CN219191896U - Hybrid drive system and vehicle - Google Patents

Abstract

The utility model belongs to the technical field of hybrid power, and relates to a hybrid power driving system and a vehicle. According to the hybrid power driving system, a plurality of driving modes can be realized by controlling the working states of the engine, the first motor and the second motor and selectively connecting or disconnecting the first connecting and disconnecting device, the second connecting and disconnecting device and the third connecting and disconnecting device, so that the hybrid power driving system is suitable for urban working conditions and small and medium-sized vehicle types, and the power performance and the economy of the whole vehicle can be considered.

Description

Hybrid drive systems and vehicles

technical field

The utility model belongs to the technical field of hybrid power, in particular to a hybrid power driving system and a vehicle.

Background technique

A vehicle's powertrain usually consists of an engine and a drive train consisting of a transmission, a differential, and drive shafts (left and right half shafts). The role of the vehicle's powertrain is to provide the vehicle with the driving force required to drive the wheels. Engines have a range of speeds and torques, and within a small range they work best, either when fuel consumption is minimized, when harmful emissions are minimized, or both. However, the actual road conditions are ever-changing, not only in the speed of the driving wheels, but also in the torque required by the driving wheels. Therefore, it is the primary task of the transmission to realize the matching of the optimal rotational speed and torque of the engine (that is, the optimal power state) and the power state of the driving wheels.

At present, there are two main types of transmissions on the market: stepped transmissions and continuously variable transmissions. Stepped transmissions are subdivided into manual and automatic. Most of them provide a limited number of discrete output and input speed ratios through different meshing arrangements of gear trains or planetary gear trains. The adjustment of the driving wheel speed between two adjacent speed ratios is realized by the speed change of the engine. A continuously variable transmission, whether mechanical, hydraulic or electromechanical, can provide an infinite number of continuously selectable speed ratios within a certain speed range. Theoretically, the speed change of the drive wheel can be done completely by the transmission. In this way, the engine can work in the optimum speed range as far as possible. At the same time, compared with the stepped transmission, the continuously variable transmission has many advantages such as smooth speed regulation and the ability to make full use of the maximum power of the engine. Therefore, continuously variable transmissions have been the focus of engineers' research for many years.

In recent years, the birth of the hybrid technology combining the engine and the electric motor has opened up a new way to realize the complete matching of the power between the engine and the driving wheels. Among the many powertrain designs, the most representative ones are series hybrid drive system and parallel hybrid drive system. In the series hybrid drive system, the internal combustion engine-generator-electric motor-shafting-driving wheels form a series power chain, and the powertrain structure is extremely simple. Among them, the generator-motor combination can be regarded as a transmission in the traditional sense. When used in conjunction with an energy storage device (such as a battery, capacitor, etc.), the transmission can also be used as an energy adjustment device to complete independent adjustments to speed and torque. The parallel hybrid drive system has two parallel independent power trains. One consists of a traditional mechanical transmission and the other consists of a motor-battery system. The mechanical transmission is responsible for regulating the speed, while the motor-battery system completes the regulation of power or torque. In order to give full play to the potential of the entire system, the mechanical transmission also needs to adopt a continuously variable speed change method.

The advantage of the series hybrid drive system is its simple structure and flexible layout. But all the power passes through the generator and the motor, so the power requirements of the motor are high, and the motor is large in size and heavy in weight. At the same time, since the energy transmission process undergoes two electromechanical and motor conversions, the efficiency of the entire drive system is low. In the parallel hybrid drive system, only part of the power passes through the motor system, so the power requirements for the motor are relatively low, and the efficiency of the drive system is high. However, the parallel hybrid drive system requires two independent subsystems, which is expensive and usually only used in mild hybrid systems.

For example, the hybrid drive system used in the Toyota Prius includes two electric motors and a planetary gear mechanism. Through reasonable control of related power sources, pure electric mode and hybrid driving mode can be realized.

However, Toyota's hybrid drive system usually has only two operating modes: pure electric mode and hybrid drive mode. Moreover, in pure electric mode and hybrid drive mode, the motor has only 1 gear to choose, making the hybrid drive system only suitable for urban working conditions and small and medium-sized vehicles. For non-urban working conditions and larger vehicles, the power and economy generally.

Utility model content

The technical problem to be solved by the utility model is: to provide a hybrid drive system and a vehicle for the existing hybrid drive system, for non-urban working conditions and relatively large vehicle models, with general power and economy problems.

In order to solve the above technical problems, on the one hand, the embodiment of the utility model provides a hybrid drive system, including an engine, a first motor, a second motor, a first planetary gear mechanism, a second planetary gear mechanism, an input shaft, and an output shaft , a first engagement and disengagement device, a second engagement and disengagement device, a third engagement and disengagement device and a differential;

The first planetary gear mechanism includes a first input element, a first output element, and a first intermediate element, and the second planetary gear mechanism includes a second input element, a second output element, and a second intermediate element; the first The motor shaft of the motor is connected to the first input element, the motor shaft of the second motor is connected to the second input element, one end of the input shaft is connected to the engine, and the other end is connected to the first output element , the first intermediate element is connected to the first stationary component, one end of the output shaft is connected to the differential, and the other end is connected to the second output element; the input shaft is coaxial with the output shaft, and the the first engagement and disengagement device is connected between the input shaft and the output shaft for selectively engaging or disengaging the input shaft and the output shaft;

the second engagement and disengagement device is connected between the second input element and the second output element for selectively engaging or disengaging the second input element and the second output element;

The third engaging and disengaging device is connected between the second intermediate element and the second stationary component, and is used for selectively engaging or disengaging the second intermediate element and the second stationary component.

Optionally, the first motor is arranged coaxially with the input shaft, the motor shaft of the first motor is a hollow shaft, the input shaft passes through the motor shaft of the first motor, and the first motor The motor shaft is coaxially connected to the first input element.

Optionally, the second motor is arranged coaxially with the output shaft, the motor shaft of the second motor is a hollow shaft, the output shaft passes through the motor shaft of the second motor, and the second motor The motor shaft is coaxially connected with the second input element.

Optionally, the motor shaft of the second motor passes through the second input element, and one end of the second engaging and disconnecting device is connected to the motor shaft of the second motor passing through the second input element to connect with the second input element through the motor shaft of the second motor.

Optionally, the hybrid drive system further includes a damping element connected between the engine and the input shaft, and the damping element is a single-mass flywheel, a dual-mass flywheel, a torsional shock absorber or a hydraulic torque converter. device.

Optionally, the first engaging and disengaging device is a clutch or a synchronizer, the second engaging and disengaging device is a clutch or a synchronizer, and the third engaging and disengaging device is a clutch, a synchronizer or a brake.

Optionally, the first planetary gear mechanism is a single planetary row composed of a first sun gear, a first planetary gear, a first planet carrier and a first ring gear;

One of the first sun gear, the first planet carrier and the first ring gear connected to the motor shaft of the first motor is the first input element, and the first sun gear, the first planet carrier and the first One of the ring gears connected to the input shaft is the first output element, the first sun gear, the first planet carrier and the first ring gear except the first input element and the first output element The outer one is the first intermediate element;

The second planetary gear mechanism is a single planetary row composed of the second sun gear, the second planetary gear, the second planet carrier and the second ring gear, and the second sun gear, the second planet carrier and the second gear The one connected to the motor shaft of the second motor is the second input element, and the one connected to the output shaft among the second sun gear, the second planet carrier and the second ring gear is the The second output element, one of the second sun gear, the second planet carrier and the second ring gear except the second input element and the second output element is the second intermediate element.

Optionally, the hybrid drive system has a pure electric drive first gear mode and a pure electric drive second gear mode;

The first engagement and disconnection device is disconnected, the second engagement and disconnection device is disconnected, the third engagement and disconnection device is engaged, the second motor is driven, the engine and the first motor are stopped, and the The above-mentioned hybrid drive system enters the first gear mode of pure electric drive;

The first engagement and disengagement device is disconnected, the second engagement and disengagement device is engaged, the third engagement and disengagement device is disengaged, the second motor is driven, the engine and the first motor are stopped, and the The above-mentioned hybrid drive system enters the 2nd gear mode of pure electric drive.

Optionally, the hybrid drive system has a series range-extending 1st gear mode and a series range-extending 2nd gear mode;

The first engagement and disengagement device is disconnected, the second engagement and disengagement device is disengaged, the third engagement and disengagement device is engaged, the second motor is driven, the engine drives the first motor to generate electricity, The hybrid drive system enters the series range-extending 1st gear mode;

The first engagement and disengagement device is disconnected, the second engagement and disengagement device is engaged, the third engagement and disengagement device is disengaged, the second motor is driven, the engine drives the first motor to generate electricity, The hybrid drive system enters into the second gear mode of series range extension.

Optionally, the hybrid drive system has a parallel hybrid 1st gear mode and a parallel hybrid 2nd gear mode;

The first coupling-disconnecting device is engaged, the second coupling-disconnecting device is disconnected, the third coupling-disconnecting device is engaged, the second motor and the engine are driven, the first motor generates power or idles, and the The above-mentioned hybrid drive system enters the parallel hybrid 1st gear mode;

The first coupling-disconnecting device is engaged, the second coupling-disconnecting device is engaged, the third coupling-disconnecting device is disconnected, the second motor and the engine are driven, the first motor generates power or idles, and the The above hybrid drive system enters the parallel hybrid 2nd gear mode.

Optionally, the hybrid drive system has an engine direct drive mode;

The first engagement and disengagement device is engaged, the second engagement and disengagement device is disengaged, the third engagement and disengagement device is disengaged, the engine is driven, the first motor is idling, and the second motor is idling , the hybrid drive system enters the engine direct drive mode.

Optionally, the hybrid drive system has a first braking energy recovery mode and a second braking energy recovery mode;

The first engagement and disconnection device is disconnected, the second engagement and disconnection device is disconnected, the third engagement and disconnection device is engaged, the engine and the first motor stop working, the second motor generates electricity, and the The hybrid drive system enters the first braking energy recovery mode;

The first engagement and disconnection device is disconnected, the second engagement and disconnection device is engaged, the third engagement and disconnection device is disconnected, the engine and the first motor stop working, the second motor generates electricity, and the The hybrid drive system enters the second braking energy recovery mode.

Optionally, the hybrid drive system has a parking power generation mode;

When the vehicle is parked, the first engagement and disconnection device is disconnected, the second motor stops working, the engine drives the first motor to generate electricity, and the hybrid drive system enters a parking power generation mode.

On the other hand, the embodiment of the present utility model also provides a vehicle, which includes the above-mentioned hybrid drive system.

The hybrid drive system and the vehicle according to the embodiment of the utility model control the working states of the engine, the first motor and the second motor, and selectively engage or disengage the first engagement and disconnection device, the second engagement and disconnection device and The third engaging and disengaging means can realize multiple driving modes. For example, pure electric drive 1st gear mode, pure electric drive 2nd gear mode, series extended range 1st gear mode, series range extended 2nd gear mode, parallel hybrid 1st gear mode, parallel hybrid 2nd gear mode and engine direct drive mode wait. Moreover, in the mode where the second electric motor participates in driving, the second electric motor can have two 2nd gears, making the hybrid drive system suitable for urban working conditions and small and medium-sized vehicles, and can take into account the power and economy of the whole vehicle.

In addition, during the mode switching process, the second motor can participate in the driving, there is no power interruption, and the driving experience is better.

In addition, the first motor can be increased in speed and torque through the first planetary gear mechanism, which can effectively reduce the volume of the first motor.

In addition, the hybrid drive system can cover HEV models and PHEV models, and the platform is better.

Description of drawings

Fig. 1 is a schematic structural diagram of a hybrid drive system provided by the first embodiment of the present invention;

Fig. 2 is a schematic structural diagram of the hybrid drive system provided by the second embodiment of the present invention.

The reference signs in the instructions are as follows:

1. Engine; 2. First motor; 3. Second motor; 4. First planetary gear mechanism; 41. First sun gear; 42. First planetary gear; 43. First planet carrier; 44. First tooth 5, the second planetary gear mechanism; 51, the second sun gear; 52, the second planetary gear; 53, the second planet carrier; 54, the second ring gear; 6, the input shaft; 7, the output shaft; 8, 9. Second engagement and disengagement device; 10. Third engagement and disengagement device; 20. Differential; 30. First stationary component; 40. Second stationary component; 50. First half shaft; 60, the second half shaft; 70, the first wheel; 80, the second wheel; 90, the damping element.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects solved by the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

The hybrid drive system provided by the embodiment of the utility model includes an engine, a first motor, a second motor, a first planetary gear mechanism, a second planetary gear mechanism, an input shaft, an output shaft, a first engagement and disconnection device, a second Engagement and disengagement device, third engagement and disengagement device and differential; the first planetary gear mechanism includes a first input element, a first output element and a first intermediate element, and the second planetary gear mechanism includes a second input element, a second output element, and a second intermediate element; the motor shaft of the first motor is connected to the first input element, the motor shaft of the second motor is connected to the second input element, and the input shaft One end of the output shaft is connected to the engine, the other end is connected to the first output element, the first intermediate element is connected to the first stationary component, one end of the output shaft is connected to the differential, and the other end is connected to the second an output member; the input shaft is coaxial with the output shaft, and the first engagement and disengagement means is connected between the input shaft and the output shaft for selectively engaging or disengaging the input shaft and the output shaft shaft; the second engagement and disengagement means is connected between the second input member and the second output member for selectively engaging or disengaging the second input member and the second output member; the first Three engaging and disengaging devices are connected between the second intermediate element and the second stationary part for selectively engaging or disengaging the second intermediate element and the second stationary part.

In some embodiments, the first stationary component is a housing of the first motor, the second stationary component is a housing of the second motor, and the housing of the first motor and the housing of the second motor are independently provided.

In some other embodiments, the housing of the first motor and the housing of the second motor are the same part, and the first stationary part and the second stationary part are a common housing of the first motor and the second motor.

In some other embodiments, the first stationary component and the second stationary component may also be other relatively stationary components on the vehicle body. The first stationary component and the second stationary component may be the same component or different components.

In some embodiments, the first motor is arranged coaxially with the input shaft, the motor shaft of the first motor is a hollow shaft, the input shaft passes through the motor shaft of the first motor, and the first motor shaft passes through the motor shaft of the first motor. A motor shaft of an electric motor is coaxially connected to the first input element.

In some embodiments, the second motor is arranged coaxially with the output shaft, the motor shaft of the second motor is a hollow shaft, the output shaft passes through the motor shaft of the second motor, and the first The motor shaft of the second motor is coaxially connected with the second input element.

In some embodiments, the motor shaft of the second motor passes through the second input element, and one end of the second engaging and disconnecting device is connected to the motor shaft of the second motor passing through the second input element. The end of the input element is connected to the second input element through the motor shaft of the second electric motor.

In some embodiments, the hybrid drive system further includes a damping element connected between the engine and the input shaft, and the damping element is a single-mass flywheel or a dual-mass flywheel.

In some other embodiments, the hybrid drive system further includes a damping element connected between the engine and the input shaft, and the damping element is a torsional shock absorber.

In some other embodiments, the hybrid drive system further includes a damping element connected between the engine and the input shaft, and the damping element is a hydraulic torque converter.

In some embodiments, the first engaging and disengaging device is a clutch or a synchronizer, the second engaging and disengaging device is a clutch or a synchronizer, and the third engaging and disengaging device is a clutch, a synchronizer or a brake.

In some embodiments, the clutch is a wet multi-plate clutch. The wet multi-plate clutch is more reliable than the dry clutch.

In some embodiments, the first planetary gear mechanism is a single planetary row formed by the first sun gear, the first planetary gear, the first planet carrier and the first ring gear; the first sun gear, the first The one of the planet carrier and the first ring gear connected to the motor shaft of the first motor is the first input element, and the first sun gear, the first planet carrier and the first ring gear are connected to the input shaft The connected one is the first output element, and one of the first sun gear, the first planet carrier and the first ring gear except the first input element and the first output element is the first intermediate Element; the second planetary gear mechanism is a single planetary row composed of the second sun gear, the second planetary gear, the second planetary carrier and the second ring gear, and the second sun gear, the second planetary carrier and the second The one of the two ring gears connected to the motor shaft of the second motor is the second input element, and the one of the second sun gear, the second planet carrier and the second ring gear connected to the output shaft is One of the second output element, the second sun gear, the second planet carrier and the second ring gear except the second input element and the second output element is the second intermediate element.

In some embodiments, the first sun gear is the first input element, the first planet carrier is the first output element, and the first ring gear is the first intermediate element.

In other embodiments, the first sun gear is the first input element, the first ring gear is the first output element, and the first planet carrier is the first intermediate element.

In some other embodiments, the first planet carrier is the first input element, the first ring gear is the first output element, and the first sun gear is the first intermediate element.

In other embodiments, the first planet carrier is the first input element, the first sun gear is the first output element, and the first ring gear is the first intermediate element.

In some other embodiments, the first ring gear is the first input element, the first sun gear is the first output element, and the first planet carrier is the first intermediate element.

In some other embodiments, the first ring gear is the first input element, the first planet carrier is the first output element, and the first sun gear is the first intermediate element.

In some embodiments, the second sun gear is the second input element, the second planet carrier is the second output element, and the second ring gear is the second intermediate element.

In some other embodiments, the second sun gear is the second input element, the second ring gear is the second output element, and the second planet carrier is the second intermediate element.

In other embodiments, the second planet carrier is the second input element, the second ring gear is the second output element, and the second sun gear is the second intermediate element.

In some other embodiments, the second planet carrier is the second input element, the second sun gear is the second output element, and the second ring gear is the second intermediate element.

In other embodiments, the second ring gear is the second input element, the second sun gear is the second output element, and the second planet carrier is the second intermediate element.

In some other embodiments, the second ring gear is the second input element, the second planet carrier is the second output element, and the second sun gear is the second intermediate element.

In some embodiments, the hybrid drive system has a pure electric drive 1st gear mode, a pure electric drive 2nd gear mode, a series extended range 1st gear mode, a series range extended 2nd gear mode, a parallel hybrid 1st gear mode, a parallel hybrid 2nd gear mode and engine direct drive mode; the first engagement and disengagement device is disconnected, the second engagement and disengagement device is disengaged, the third engagement and disengagement device is engaged, the second motor is driven, and the The engine and the first electric motor stop working, and the hybrid drive system enters into the first gear mode of pure electric drive; the first engaging and disengaging device is disengaged, the second engaging and disengaging device is engaged, and the third engaging and disengaging device is disengaged. The opening device is disconnected, the second motor is driven, the engine and the first motor stop working, and the hybrid drive system enters the pure electric driving 2nd gear mode; the first engagement and disconnection device is disconnected, and the first The second engagement and disengagement device is disconnected, the third engagement and disengagement device is engaged, the second motor is driven, the engine drives the first motor to generate electricity, and the hybrid drive system enters the first-gear mode of series extended range; The first engagement and disengagement device is disconnected, the second engagement and disengagement device is engaged, the third engagement and disengagement device is disengaged, the second motor is driven, the engine drives the first motor to generate electricity, The hybrid drive system enters the series range extended 2nd gear mode; the first engagement and disengagement device is engaged, the second engagement and disengagement device is disengaged, the third engagement and disengagement device is engaged, and the second electric motor and the engine drive, the first electric motor generates power or idles, and the hybrid drive system enters the parallel hybrid 1st gear mode; the first engaging and disengaging device is engaged, the second engaging and disengaging device is engaged, and the first The three-engagement-disengagement device is disconnected, the second motor and the engine are driven, the first motor generates power or idles, and the hybrid drive system enters the parallel hybrid 2nd gear mode; the first engagement-disconnection device is engaged, The second engagement and disconnection device is disconnected, the third engagement and disconnection device is disconnected, the engine is driven, the first motor is idling, the second motor is idling, and the hybrid drive system enters the engine direct drive mode.

In some embodiments, the hybrid drive system has a first braking energy recovery mode, a second braking energy recovery mode, and a parking power generation mode; the first engagement and disconnection device is off, and the second engagement The disconnecting device is disconnected, the third engagement and disconnection device is engaged, the engine and the first motor stop working, the second motor generates power, and the hybrid drive system enters the first braking energy recovery mode; the The first engagement and disengagement device is disconnected, the second engagement and disengagement device is engaged, the third engagement and disengagement device is disengaged, the engine and the first motor stop working, the second motor generates electricity, and the hybrid The power drive system enters the second braking energy recovery mode; when the vehicle is parked, the first engagement and disconnection device is disconnected, the second motor stops working, the engine drives the first motor to generate electricity, and the The hybrid drive system enters park-generating mode.

The hybrid drive system and the vehicle according to the embodiment of the utility model control the working states of the engine, the first motor and the second motor, and selectively engage or disengage the first engagement and disconnection device, the second engagement and disconnection device and The third engaging and disengaging means can realize multiple driving modes. For example, pure electric drive 1st gear mode, pure electric drive 2nd gear mode, series extended range 1st gear mode, series range extended 2nd gear mode, parallel hybrid 1st gear mode, parallel hybrid 2nd gear mode and engine direct drive mode wait. Moreover, in the mode where the second electric motor participates in driving, the second electric motor can have two 2nd gears, making the hybrid drive system suitable for urban working conditions and small and medium-sized vehicles, and can take into account the power and economy of the whole vehicle.

In addition, during the mode switching process, the second motor can participate in the driving, there is no power interruption, and the driving experience is better.

In addition, the first motor can be increased in speed and torque through the first planetary gear mechanism, which can effectively reduce the volume of the first motor.

In addition, the hybrid drive system can cover HEV models and PHEV models, and the platform is better.

In addition, the hybrid drive system can also realize the first braking energy recovery mode, the second braking energy recovery mode and the parking power generation mode.

The hybrid drive system provided by the embodiment of the present utility model will be described in detail below with reference to FIG. 1 and FIG. 2 .

first embodiment

As shown in Figure 1, the hybrid drive system provided by the first embodiment of the utility model includes an engine 1, a first motor 2, a second motor 3, a first planetary gear mechanism 4, a second planetary gear mechanism 5, an input shaft 6. Output shaft 7 , first engagement and disengagement device 8 , second engagement and disengagement device 9 , third engagement and disengagement device 10 and differential 20 .

The first planetary gear mechanism 4 is a single planetary row composed of the first sun gear 41, the first planet gear 42, the first planet carrier 43 and the first ring gear 44; The motor shaft 21 of the first motor 2 is connected to form the first input element, the first planet carrier 43 is connected to the input shaft 6 to form the first output element, and the first ring gear 44 is the first output element. Describe the first intermediate element.

The second planetary gear mechanism 5 is a single planetary row formed by the second sun gear 51, the second planet gear 52, the second planet carrier 53 and the second ring gear 54; The motor shaft 31 of the second motor 3 is connected to form the second input element, the second ring gear 54 is connected to the output shaft 7 to form the second output element, and the second planet carrier 53 is the second output element. Describe the second intermediate element.

One end of the input shaft 6 is connected to the engine 1 , the other end is connected to the first output element (the first planet carrier 43 ), and the first intermediate element (the first ring gear 44 ) is connected to the first stationary component 30 , one end of the output shaft 7 is connected to the differential 20, and the other end is connected to the second output element (the second ring gear 54); the input shaft 6 is coaxial with the output shaft 7, and the first An engaging and disengaging device 8 is connected between the input shaft 6 and the output shaft 7 for selectively engaging or disengaging the input shaft 6 and the output shaft 7 . That is, when the first engagement and disengagement device 8 is engaged, the input shaft 6 and the output shaft 7 are power-coupled, and when the first engagement and disengagement device 8 is disengaged, the input shaft 6 and the output shaft 7 are disengaged. open.

Both ends of the differential 20 are respectively connected to the first half shaft 50 and the second half shaft 60 , the outer end of the first half shaft 50 is connected to the first wheel 70 , and the outer end of the second half shaft 60 is connected to the second wheel 80 . One of the first wheel 70 and the second wheel 80 is a left wheel, and the other is a right wheel.

The second engagement and disengagement device 9 is connected between the second input element (the second sun gear 51) and the second output element (the second ring gear 54), for selectively engaging or disengaging the The second input element (the second sun gear 51) and the second output element (the second ring gear 54); the third engagement and disconnection device 10 is connected between the second intermediate element (the second planet carrier 43) and the second Between the two stationary components 40 , it is used to selectively engage or disconnect the second intermediate element (second planetary carrier 43 ) and the second stationary component 40 . In this way, when the second engagement and disengagement device 9 is engaged and the third engagement and disengagement device 10 is disengaged, the second planetary gear mechanism 5 rotates as a whole, and the speed ratio of the second planetary gear mechanism 5 is 1. When the second engagement and disengagement device 9 is disengaged and the third engagement and disengagement device 10 is engaged, the speed ratio of the second planetary gear mechanism 5 is not 1. That is, by controlling the engagement or disengagement of the second engagement and disengagement device 9 and the third engagement and disengagement device 10 , two different speed ratios of the second planetary gear mechanism 5 can be realized. In this way, the second motor 3 has two gears when driven.

The first stationary component 30 is the housing of the first motor 2 , the second stationary component 40 is the housing of the second motor 3 , and the housing of the first motor 2 and the housing of the second motor 3 are independently provided. Alternatively, the casing of the first motor 2 and the casing of the second motor 3 are the same part, and the first stationary part 30 and the second stationary part 40 are a common casing of the first motor 2 and the second motor 3 . Alternatively, the first stationary component 30 and the second stationary component 40 are other relatively stationary components on the vehicle body, such as the transmission case. The first stationary component 30 and the second stationary component 40 may be the same component or different components.

The first motor 2 is coaxially arranged with the input shaft 6, the motor shaft 21 of the first motor 2 is a hollow shaft, the input shaft 6 passes through the motor shaft 21 of the first motor 2, the The motor shaft 21 of the first motor 2 is coaxially connected to the first input element (the first sun gear 41 ).

The second motor 3 is coaxially arranged with the output shaft 7, the motor shaft 31 of the second motor 3 is a hollow shaft, the output shaft 7 passes through the motor shaft 31 of the second motor 3, the The motor shaft 31 of the second motor 3 is coaxially connected with the second input element (the second sun gear 51 ). In this way, the engine 1 , the first motor 2 , the second motor 3 , the first planetary gear mechanism 4 , the second planetary gear mechanism 5 , the input shaft 6 and the output shaft 7 are coaxially arranged.

The motor shaft 31 of the second motor 3 passes through the second input element (the second sun gear 51), and one end of the second engagement and disconnection device 9 is connected to the motor shaft 31 of the second motor 3. The end of the second input element (the second sun gear 51 ) passes through, so as to be connected with the second input element (the second sun gear 51 ) through the motor shaft 31 of the second motor 3 .

The hybrid drive system also includes a damping element 90 connected between the engine 1 and the input shaft 6, the damping element 90 is a single-mass flywheel, a dual-mass flywheel, a torsional shock absorber or a hydraulic torque converter device.

The first on-off device 8 is a clutch, the second on-off device 9 is a clutch, and the third on-off device 10 is a brake. The clutch can be a wet multi-plate clutch, and the wet multi-plate clutch is more reliable than the dry clutch.

Of course, a synchronizer can also be used instead of a clutch or a brake.

The hybrid drive system of the first embodiment of the utility model controls the working states of the engine 1, the first motor 2 and the second motor 3, and selectively engages or disengages the first engagement and disconnection device 8, the second engagement The disconnecting device 9 and the third engaging and disconnecting device 10 can realize a plurality of driving modes. For example, pure electric drive 1st gear mode, pure electric drive 2nd gear mode, series extended range 1st gear mode, series range extended 2nd gear mode, parallel hybrid 1st gear mode, parallel hybrid 2nd gear mode and engine direct drive mode wait. Moreover, in the driving mode in which the second motor 3 participates, the second motor 3 can have two 2nd gears, so that the hybrid drive system is suitable for urban working conditions and small and medium-sized vehicles, and can take into account the power and economy of the whole vehicle .

In addition, during the mode switching process, the second electric motor 3 can participate in driving, and there is no power interruption, so the driving experience is better. The first motor 2 can be increased in speed and torque through the first planetary gear mechanism 4 , which can effectively reduce the volume of the first motor 2 . The hybrid drive system can cover HEV models and PHEV models, and has a good platform.

For the control in each driving mode, see the following table 1:

Table 1

In Table 1, "/" means not working.

The power transmission in each driving mode is as follows:

(1) 1st gear mode of pure electric drive

The first engagement and disengagement device 8 is disconnected, the second engagement and disengagement device 9 is disengaged, the third engagement and disengagement device 10 is engaged, the second motor 3 is driven, the engine 1 and the first The motor 2 stops working, and the hybrid drive system enters the first gear mode of pure electric drive. At this time, the power transmission route is: second motor 9 - second sun gear 51 - second planetary gear 52 - second ring gear 54 - output shaft 7 - differential 20 .

(2) Pure electric drive 2nd gear mode

The first engagement and disengagement device 8 is disconnected, the second engagement and disengagement device 9 is engaged, the third engagement and disengagement device 10 is disengaged, the second motor 3 is driven, the engine 1 and the first The motor 2 stops working, and the hybrid drive system enters the pure electric drive 2nd gear mode. At this time, the power transmission route is: second motor 9 - second planetary gear mechanism 5 (whole rotation) - output shaft 7 - differential 20 .

(3) Series range extender 1 gear mode

The first engagement and disengagement device 8 is disconnected, the second engagement and disengagement device 9 is disengaged, the third engagement and disengagement device 10 is engaged, the second motor 3 is driven, and the engine 1 drives the first The motor 2 generates electricity, and the hybrid drive system enters the first gear mode of series range extension. At this time, the power transmission route is: second motor 9 - second sun gear 51 - second planetary gear 52 - second ring gear 54 - output shaft 7 - differential 20 .

(4) Series extended range 2 gear mode

The first engagement and disengagement device 8 is disconnected, the second engagement and disengagement device 9 is engaged, the third engagement and disengagement device 10 is disengaged, the second motor 3 is driven, and the engine 1 drives the first The electric motor 2 generates electricity, and the hybrid drive system enters the second gear mode of the series extended range. At this time, the power transmission route is: second motor 9 - second planetary gear mechanism 5 (whole rotation) - output shaft 7 - differential 20 .

(5) Parallel hybrid 1st gear mode

The first engagement and disengagement device 8 is engaged, the second engagement and disengagement device 9 is disengaged, the third engagement and disengagement device 10 is engaged, the second motor 3 is driven, the engine 1 is driven, the The first motor 2 generates electricity or runs idly, and the hybrid drive system enters the parallel hybrid first gear mode. At this time, there are two power transmission routes, the first one is: second motor 9-second sun gear 51-second planetary gear 52-second ring gear 54-output shaft 7-differential 20; It is: engine 1 - input shaft 6 - first engagement and disengagement device 8 - output shaft 7 - differential 20 .

(6) Parallel hybrid 2nd gear mode

The first engagement and disengagement device 8 is engaged, the second engagement and disengagement device 9 is engaged, the third engagement and disengagement device 10 is disengaged, the second motor 3 is driven, the engine 1 is driven, the The first motor 2 generates power or runs idly, and the hybrid drive system enters the parallel hybrid second gear mode. At this time, there are two power transmission routes, the first one is: second motor 9-second planetary gear mechanism 5 (integral rotation)-output shaft 7-differential 20; the second one is: engine 1-input shaft 6 - first engagement and disengagement device 8 - output shaft 7 - differential 20 .

(7) Engine direct drive mode

The first engagement and disengagement device 8 is engaged, the second engagement and disengagement device 9 is disengaged, the third engagement and disengagement device 10 is disengaged, the engine 1 is driven, and the first motor 2 is idling. The second motor 3 is idling, and the hybrid drive system enters the engine direct drive mode. At this time, the power transmission route is: engine 1 - input shaft 6 - first engagement and disengagement device 8 - output shaft 7 - differential 20 .

(8) The first braking energy recovery mode

The first engagement and disengagement device 8 is disconnected, the second engagement and disengagement device 9 is disengaged, the third engagement and disengagement device 10 is engaged, the engine 1 and the first motor 2 are stopped, and the second engagement and disengagement device 10 is engaged. The second motor 3 generates electricity, and the hybrid drive system enters the first braking energy recovery mode. At this time, the braking energy recovery route is: wheel-differential 20-output shaft 7-second ring gear 54-second planetary gear 52-second sun gear 51-second motor 3.

(9) The second braking energy recovery mode

The first engagement and disengagement device 8 is turned off, the second engagement and disengagement device 9 is engaged, the third engagement and disengagement device 10 is turned off, the engine 1 and the first motor 2 stop working, and the second engagement and disengagement device 10 is turned off. The second motor 3 generates electricity, and the hybrid drive system enters the first braking energy recovery mode. At this time, the braking energy recovery route is: wheel-differential 20-output shaft 7-second planetary gear mechanism 5 (whole rotation)-second motor 3.

(10) Parking power generation mode

The first engaging and disengaging device 8 is disconnected, the second electric motor 3 stops working, the engine 1 drives the first electric motor 2 to generate electricity, and the hybrid drive system enters the parking electric power generation mode. At this time, the power transmission route is: engine 1 - input shaft 6 - first sun gear 41 - first motor 2 .

In addition, under the mode in which the second motor 3 alone drives the vehicle (1st gear mode of pure electric drive, 2nd gear mode of pure electric drive), the disconnection of the first engagement and disconnection device 8 can cut off the connection between the engine 1 and the wheel end, reducing the Drag torque for improved transmission efficiency.

second embodiment

Fig. 2 shows the hybrid drive system provided by the second embodiment of the present utility model, which is different from the first embodiment in that the first sun gear 41 is the first input element, and the first ring gear 44 is the first output element, and the first planet carrier 43 is the first intermediate element.

The second embodiment can also realize the pure electric drive 1st gear mode, pure electric drive 2nd gear mode, series extended range 1st gear mode, series series extended range 2 gear mode, parallel hybrid 1st gear mode, and parallel hybrid drive in the first embodiment. 2nd gear mode, engine direct drive mode, first braking energy recovery mode, second braking energy recovery mode and parking power generation mode, etc. The process of realizing the above mode in the second embodiment is similar to that in the first embodiment.

In addition, the embodiment of the present utility model also provides a vehicle, which includes the hybrid drive system of the above embodiment.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (14)

1. The hybrid power driving system is characterized by comprising an engine, a first motor, a second motor, a first planetary gear mechanism, a second planetary gear mechanism, an input shaft, an output shaft, a first engagement and disengagement device, a second engagement and disengagement device, a third engagement and disengagement device and a differential mechanism;

the first planetary gear mechanism comprises a first input element, a first output element and a first intermediate element, and the second planetary gear mechanism comprises a second input element, a second output element and a second intermediate element; the motor shaft of the first motor is connected with the first input element, the motor shaft of the second motor is connected with the second input element, one end of the input shaft is connected with the engine, the other end of the input shaft is connected with the first output element, the first middle element is connected to a first static part, one end of the output shaft is connected with the differential mechanism, and the other end of the output shaft is connected with the second output element; the input shaft is coaxial with the output shaft, and the first engagement and disengagement device is connected between the input shaft and the output shaft and used for selectively engaging or disengaging the input shaft and the output shaft;

The second engagement and disengagement means is connected between the second input element and the second output element for selectively engaging or disengaging the second input element and the second output element;

the third engagement and disengagement means is connected between the second intermediate element and the second stationary member for selectively engaging or disengaging the second intermediate element from the second stationary member.

2. The hybrid drive system of claim 1, wherein the first motor is coaxially disposed with the input shaft, the motor shaft of the first motor is a hollow shaft, the input shaft passes through the motor shaft of the first motor, and the motor shaft of the first motor is coaxially connected with the first input member.

3. The hybrid drive system of claim 2, wherein the second motor is coaxially disposed with the output shaft, the motor shaft of the second motor being a hollow shaft, the output shaft passing through the motor shaft of the second motor, the motor shaft of the second motor being coaxially connected with the second input member.

4. A hybrid drive system as set forth in claim 3 wherein the motor shaft of the second motor passes through the second input member, and one end of the second engagement and disengagement means is connected to an end of the motor shaft of the second motor that passes out of the second input member to be connected to the second input member through the motor shaft of the second motor.

5. The hybrid drive system of claim 1, further comprising a damper element connected between the engine and the input shaft, the damper element being a single mass flywheel, a dual mass flywheel, a torsional damper, or a torque converter.

6. The hybrid drive system of claim 1, wherein the first engagement and disengagement device is a clutch or synchronizer, the second engagement and disengagement device is a clutch or synchronizer, and the third engagement and disengagement device is a clutch, synchronizer, or brake.

7. The hybrid drive system according to any one of claims 1-6, wherein the first planetary gear mechanism is a single row of first sun gears, first planet gears, first carrier, and first ring gears;

one of the first sun gear, the first planet carrier and the first gear ring, which is connected with a motor shaft of the first motor, is the first input element, one of the first sun gear, the first planet carrier and the first gear ring, which is connected with the input shaft, is the first output element, and one of the first sun gear, the first planet carrier and the first gear ring, which is other than the first input element and the first output element, is the first intermediate element;

The second planetary gear mechanism is a single planetary gear set comprising a second sun gear, a second planet carrier and a second gear ring, one of the second sun gear, the second planet carrier and the second gear ring, which is connected with a motor shaft of the second motor, is the second input element, one of the second sun gear, the second planet carrier and the second gear ring, which is connected with the output shaft, is the second output element, and one of the second sun gear, the second planet carrier and the second gear ring, which is not the second input element and the second output element, is the second intermediate element.

8. The hybrid drive system of claim 1, wherein the hybrid drive system has a drive-only 1 gear mode and a drive-only 2 gear mode;

the first engagement and disconnection device is disconnected, the second engagement and disconnection device is disconnected, the third engagement and disconnection device is engaged, the second motor is driven, the engine and the first motor stop working, and the hybrid power driving system enters a pure electric 1-gear mode;

the first engagement and disconnection device is disconnected, the second engagement and disconnection device is engaged, the third engagement and disconnection device is disconnected, the second motor is driven, the engine and the first motor stop working, and the hybrid power driving system enters a pure electric 2-gear mode.

9. The hybrid drive system of claim 1, wherein the hybrid drive system has a series range-extending 1-gear mode and a series range-extending 2-gear mode;

the first engagement and disengagement device is disengaged, the second engagement and disengagement device is disengaged, the third engagement and disengagement device is engaged, the second motor is driven, the engine drives the first motor to generate power, and the hybrid power driving system enters a series range-extending 1-gear mode;

the first engagement and disengagement device is disengaged, the second engagement and disengagement device is engaged, the third engagement and disengagement device is disengaged, the second motor is driven, the engine drives the first motor to generate power, and the hybrid power driving system enters a series range-extending 2-gear mode.

10. The hybrid drive system of claim 1, wherein the hybrid drive system has a parallel hybrid 1-speed mode and a parallel hybrid 2-speed mode;

the first engagement and disengagement device is engaged, the second engagement and disengagement device is disengaged, the third engagement and disengagement device is engaged, the second motor and the engine are driven, the first motor generates electricity or idles, and the hybrid power driving system enters a parallel hybrid power 1-gear mode;

The first engagement and disengagement device is engaged, the second engagement and disengagement device is engaged, the third engagement and disengagement device is disengaged, the second motor and the engine are driven, the first motor generates electricity or idles, and the hybrid power driving system enters a parallel hybrid 2-gear mode.

11. The hybrid drive system of claim 1, wherein the hybrid drive system has an engine direct drive mode;

the first engagement and disengagement device is engaged, the second engagement and disengagement device is disengaged, the third engagement and disengagement device is disengaged, the engine is driven, the first motor is idle, the second motor is idle, and the hybrid drive system enters an engine direct drive mode.

12. The hybrid drive system of claim 1, wherein the hybrid drive system has a first braking energy recovery mode and a second braking energy recovery mode;

the first engagement and disengagement device is disengaged, the second engagement and disengagement device is disengaged, the third engagement and disengagement device is engaged, the engine and the first motor stop working, the second motor generates electricity, and the hybrid power driving system enters a first braking energy recovery mode;

The first engagement and disengagement device is disengaged, the second engagement and disengagement device is engaged, the third engagement and disengagement device is disengaged, the engine and the first motor stop working, the second motor generates electricity, and the hybrid power driving system enters a second braking energy recovery mode.

13. The hybrid drive system of claim 1, wherein the hybrid drive system has a park power generation mode;

when the vehicle is parked, the first engagement and disengagement device is disengaged, the second motor stops working, the engine drives the first motor to generate electricity, and the hybrid power driving system enters a parking electricity generation mode.

14. A vehicle comprising the hybrid drive system of any one of claims 1-13.

Images