CN106427547B - Vehicle hybrid power drive system and hybrid vehicle - Google Patents

Abstract

A vehicle hybrid drive system, including engine, motor, battery, clutch system, brake system, front row planetary gear mechanism, rear row planetary gear mechanism and drive shaft, the front row planet carrier is fixedly connected with the rear row sun gear, the engine The output shaft of the rear row is fixedly connected with the rear planetary carrier, and a differential reducer is provided between the rear row planetary gear mechanism and the drive shaft, the rear ring gear is connected with the drive shaft through the differential reducer, the battery is connected with the motor, and the motor passes through the first clutch It is connected with the front row ring gear, the motor is connected with the front row sun gear through the second clutch, the motor is connected with the output shaft of the engine through the third clutch, and the brake system controls the components in the front row planetary gear mechanism and the rear row planetary gear mechanism. brake. The present invention can simultaneously adopt three clutches to realize the power switching of different working modes, has the characteristics of double clutches and can well make up for the shortage of double clutch interfaces.

Description

Vehicle hybrid drive system and hybrid vehicle

technical field

The invention relates to the technical field of hybrid vehicles, in particular to a vehicle hybrid drive system and a hybrid vehicle with the drive system.

Background technique

With the development of vehicle technology, people have put forward more and more requirements for the performance of vehicles. Because hybrid vehicles not only have good power, maneuverability, comfort and safety, but also can reduce fuel consumption and emissions, It is becoming more and more popular.

A hybrid vehicle refers to a vehicle powered by two or more drive units that can operate simultaneously, and it selects different drive units to provide power independently or jointly according to the actual driving state of the vehicle. According to the classification of power transmission routes, hybrid electric vehicles can be divided into three types: series, parallel and hybrid, among which hybrid hybrid vehicles have better performance in terms of fuel consumption and emissions. Hybrid vehicles can be divided into torque coupling type, speed coupling type, traction force coupling type and hybrid coupling type according to the power coupling mode output by the power source. The hybrid coupling type has the advantages of both torque coupling type and speed coupling type. It has great advantages in terms of fuel economy, power and smoothness of working mode switching. In the prior art, a hybrid hybrid vehicle generally needs to achieve speed coupling through planetary gears or differential reducers, and realize torque coupling through gears, magnetic fields or chain belts. When the series hybrid coupling mechanism adopts the planetary gear train scheme, at least two motors need to be provided, and the coupling between multiple power sources can be realized through multiple single clutches.

A hybrid drive device is disclosed in the patent with the publication number CN103786564A, which includes an engine, a double motor, a double row planetary gear mechanism, a clutch and a brake, the front row sun gear is provided with a brake, and the front row planet carrier It is connected to the power output end of the engine, and the front planet carrier is also connected to the first motor shaft through the first clutch, the first motor shaft is connected to the front ring gear, the front ring gear is connected to the rear planet carrier through the second clutch, and the rear sun gear It is connected with the main shaft of the second motor, and connected with the power drive shaft of the driving device through the rear ring gear, so as to drive the vehicle to travel. The invention solves the problem that the first and second motors of the parallel shaft gear transmission mechanism cannot work in the high-efficiency area at the same time by designing a double-row planetary gear mechanism and double motors, which can realize the coupling of speed and torque. In high-speed driving mode, the problem of low efficiency of the generator. However, the dual-motor mixed-connected hybrid power system has a complex structure, many parts, and long axial dimensions, which increases the difficulty of manufacturing and layout, and increases the cost.

The patent with the publication number CN 102678871A discloses a three-clutch transmission device for an electric vehicle and an electric vehicle. Three clutches are used to connect with the first gear, the second gear and the third gear respectively, and the gear position controller automatically controls the input shaft. Connecting different gears through different clutches can take into account the maximum speed and maximum gradient, and can realize power shifting. It has the advantages of short shifting time, good shifting quality, and compact structure. However, this invention has only one power input interface. Realizing the power coupling of different power sources can only be applied to pure electric vehicles or traditional vehicles.

In the existing hybrid drive system, although the single-motor structure has simple components, it cannot have the functions of speed coupling and torque coupling; while the multi-motor structure can realize the conversion of various operating modes, but the hybrid The layout and control of the drive system will become complicated. In addition, most of the multi-motor hybrid drive systems realize different working modes by controlling the separation or combination of multiple single clutches and brakes. Multiple single clutches will make the hydraulic circuit become It is complicated and cannot realize uninterrupted switching of power through cross-working, the response speed is slow, and the smoothness of mode switching is poor, which affects the quality of working mode switching.

Contents of the invention

The object of the present invention is to provide a vehicle hybrid drive system and a hybrid vehicle. The system has a simple structure, and the vehicle can switch between multiple working modes by using a single motor and matching three clutches. , the response speed is fast, and the working mode switching has better smoothness.

The invention provides a vehicle hybrid driving system, which includes an engine, a motor, a storage battery, a clutch system, a braking system, a front row planetary gear mechanism, a rear row planetary gear mechanism and a drive shaft. The front row planetary gear mechanism includes a front row Sun gear, front row planetary gear, front row ring gear and front row planet carrier, the rear row planetary gear mechanism includes rear row sun gear, rear row planetary gear, rear row ring gear and rear row planet carrier, the front row The star carrier is fixedly connected with the rear sun gear, the output shaft of the engine is fixedly connected with the rear planetary carrier, and a differential speed reducer is provided between the rear planetary gear mechanism and the drive shaft, so The rear ring gear is connected to the drive shaft through the differential reducer, the drive shaft transmits power to the wheels, the battery is connected to the motor, and the clutch system includes a first clutch, a second clutch and The third clutch, the motor is connected with the front row ring gear through the first clutch, the motor is connected with the front row sun gear through the second clutch, and the motor is connected with the front row sun gear through the third clutch The output shafts of the engines are connected, and the brake system brakes the components in the front row planetary gear mechanism and the rear row planetary gear mechanism.

Further, the braking system includes a first brake, a second brake and a third brake, the first brake is connected to the front sun gear and is used to lock the front sun gear, and the second brake It is connected with the front ring gear and used for locking the front ring gear, and the third brake is connected with the rear planet carrier and is used for locking the rear planet carrier.

Further, the engine, the motor, the first clutch, the second clutch, the third clutch, the front planetary gear mechanism and the rear planetary gear mechanism are arranged coaxially.

Further, the vehicle hybrid drive system also includes a vehicle hybrid drive system master controller, a clutch controller and a brake controller, the master controller controls the start and stop of the engine and the motor, the The clutch controller and the brake controller respectively control the combination and separation of the clutch system and the brake system.

Further, the vehicle hybrid drive system has a pure electric mode, in which the vehicle is only driven by the motor, and the vehicle has two working states, the first working state and the second working state; In the first working state, the second clutch is combined with the front sun gear, the second brake locks the front ring gear, and the third brake locks the rear planet carrier in the second working state, the first clutch is combined with the front ring gear, the first brake locks the front sun gear, and the third brake locks the rear planet carrier end.

Further, the vehicle hybrid drive system has an engine driving mode, in which the first clutch, the second clutch and the third clutch are all disengaged, the engine is started and the The motor stops, the first brake locks the front sun gear, and the second brake locks the front ring gear.

Further, the vehicle hybrid drive system has a torque coupling hybrid drive mode, in which the torque coupling hybrid drive mode, the third clutch is combined with the engine, the engine and the electric motor are both started, and the The first brake locks the front sun gear, and the second brake locks the front ring gear.

Further, the vehicle hybrid drive system has a continuously variable hybrid drive mode, in which the engine and the motor are both started, and the vehicle has a third working state and a fourth working state Two working states; in the third working state, the first clutch is combined with the front ring gear, and the first brake locks the front sun gear; in the fourth In the working state, the second clutch is combined with the front sun gear, and the second brake locks the front ring gear.

Further, the vehicle hybrid drive system has a torque coupling hybrid drive charging mode, in the torque coupling hybrid drive charging mode, the third clutch is combined with the engine, and the first brake connects the front row The sun gear is locked, the second brake locks the front ring gear, the motor works in the generator state and can convert the excess kinetic energy of the engine driving the vehicle into electrical energy and store it in the battery .

The present invention also provides a hybrid vehicle, which includes any vehicle hybrid drive system provided in the present invention.

To sum up, the hybrid drive system provided by the present invention cleverly couples the power of the engine and the motor together through the rational layout of the power coupling system, the three-clutch and the double-row planetary gear mechanism, uses a single motor and controls the power of the three-clutch and the action of the brake can realize the coupling of the speed and torque of the hybrid drive system, which reduces the complexity of the system and realizes multiple working modes. The layout is simple, the structure is compact, the weight is light, and the fuel economy of the vehicle is improved. Reduce emissions, and at the same time achieve the smoothness and optimal response of working mode switching, avoiding the problem of complex layout and high cost caused by the use of dual motors. At the same time, three clutches are used to realize power switching of different working modes, which has the characteristics of double clutches And it can well make up for the deficiency of the double clutch interface.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

FIG. 1 is a schematic structural diagram of a vehicle hybrid drive system provided by the present invention.

Detailed ways

In order to further illustrate the technical means and functions adopted by the present invention to achieve the intended invention purpose, the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

Fig. 1 is a structural schematic diagram of a vehicle hybrid drive system provided by the present invention. As shown in Fig. 1, the vehicle hybrid drive system provided by the present invention is connected to the wheels, and the drive system includes an engine 10, a motor 20, a storage battery 30, and a clutch system 40, braking system 50, front row planetary gear mechanism 60, rear row planetary gear mechanism 70 and drive shaft 80.

The front row planetary gear mechanism 60 includes the front row sun gear 61, the front row planetary gear 62, the front row ring gear 63 and the front row planet carrier 64, and the rear row planetary gear mechanism 70 includes the rear row sun gear 71, the rear row planetary gear 72, The rear ring gear 73 and the rear planet carrier 74. The front planetary carrier 64 is fixedly connected with the rear row sun gear 71, and the output shaft of the engine 10 is fixedly connected with the rear row planetary carrier 74. A differential reducer 81 is provided between the rear planetary gear mechanism 70 and the drive shaft 80, the rear ring gear 73 is connected to the differential reducer 81 through a reduction gear set (not shown), and the differential reducer 81 is connected to the drive shaft 80. Drive shaft 80 transmits power to wheels 90 .

The clutch system 40 includes a first clutch 41, a second clutch 42 and a third clutch 43. The motor 20 is connected with the front row ring gear 63 through the first clutch 41, and the motor 20 is connected with the front row sun gear 61 through the second clutch 42. 20 is connected to the output shaft of the engine 10 through the third clutch 43 . The brake system 50 brakes the components in the front row planetary gear mechanism 60 and the rear row planetary gear mechanism 70 to change the relative motion relationship of each component. The present invention controls the combination or separation of the motor 20, the front row ring gear 63, the front row sun gear 61, and the engine 10 through the clutch system 40, and the brake system 50 controls the front row planetary gear mechanism 60 and the rear row planetary gear mechanism 70. The braking of components can be accomplished by using a single motor 20 to switch between multiple working modes of the hybrid drive system.

Specifically, the engine 10 , the motor 20 , the clutch system 40 , the front row planetary gear mechanism 60 , and the rear row planetary gear mechanism 70 are coaxially arranged to facilitate power transmission and coupling between the engine 10 and the motor 20 . The braking system 50 includes a first brake 51, a second brake 52 and a third brake 53. The first brake 51 is connected to the front sun gear 61 for locking the front sun gear 61; the second brake 52 is connected to the front gear The ring 63 is connected to lock the front ring gear 63; the third brake 53 is connected to the rear planet carrier 74 to lock the rear planet carrier 74.

In order to facilitate the control of the vehicle hybrid drive system provided by the present invention, the vehicle hybrid drive system provided by the present invention also includes a hybrid drive system master controller (not shown), a clutch controller (not shown) and a braking control (not shown), the overall controller of the hybrid drive system can control the start and stop of the engine 10 and the motor 20, and the clutch controller and brake controller can control the start and stop of the clutch system 40 and the brake system 50 respectively.

In this embodiment, the engine 10 can be a gasoline or diesel engine, the motor 20 can be a permanent magnet synchronous motor with a permanent magnet in the outer winding, the clutches 41, 42, 43 can be hollow shaft multi-plate clutches, and the brakes 51, 52, 53 can be caliper disc brakes, hydraulic friction plate brakes or electromagnetic brakes, the front and rear planetary gear mechanisms 60, 70 can be high-strength, low-noise, properly modified gears, and the differential speed reducer 81 can be an open differential gear. speed reducer, the battery 30 can be a lithium-ion battery with high power density, mass ratio, high charging efficiency, and long life, the drive shaft 80 can be a high-efficiency, low-vibration constant-speed drive shaft, and the wheels 90 can be low rolling resistance High-performance tires with low wind and dryness and good handling stability.

The vehicle hybrid drive system provided by the present invention can make the power drive system have pure electric mode, engine drive mode, torque coupling hybrid drive mode, continuously variable speed hybrid drive mode, braking energy recovery mode, engine start mode, torque coupling hybrid drive mode Various working modes such as the charging mode and the parking charging mode, the working modes of the hybrid drive system provided by the present invention in each working mode will be described below.

Pure electric mode: when the vehicle is running at a lower speed or the vehicle is started, low-speed cruising, etc. to make the engine 10 work at a low-medium load, in order to avoid the engine 10 working in a low-efficiency area, the pure electric mode can be selected at this time, only through the motor 20 The vehicle is driven to travel. In this mode, the vehicle has two working states, the first working state and the second working state.

When the hybrid drive system is in the first working state, the second clutch 42 is combined with the front sun gear 61 to transmit the power of the motor 20 to the front sun gear 61, the second brake 52 is combined with the front ring gear 63, and The front ring gear 63 is locked, the third brake 53 is combined with the rear planetary carrier 74, and the rear planetary carrier 74 is locked. At this time, the power of the vehicle is transmitted to the rear sun gear 71 by the motor 20 through the front sun gear 61, the front planetary gear 62 and the front planet carrier 64, and the rear sun gear 71 transmits the power through the rear planetary gear 72. The power is transmitted to the rear ring gear 73, and the rear ring gear 73 transmits the differentially decelerated power to the drive shaft 80 through the differential speed reducer 81 to drive the vehicle.

Assuming that in the present invention, the characteristic parameter of the front row planetary gear mechanism 60 is K ₁ (that is, the ratio of the number of teeth of the front row ring gear 63 to the front row sun gear 61 is K ₁ ), according to the motion characteristics of the planet row, there is a formula:

n _S1 +K ₁ n _R1 -(1+K ₁ )n _P1 =0,,

Wherein: n _S1 is the rotational speed of the front sun gear 61 , n _R1 is the rotational speed of the front ring gear 63 , and n _P1 is the rotational speed of the front planetary carrier 64 .

Similarly, assuming that the characteristic parameter of the rear planetary gear mechanism 70 is K ₂ (that is, the ratio of the number of teeth of the rear ring gear 73 to the rear sun gear 71 is K ₂ ), according to the motion characteristics of the planetary row, there is a formula:

n _S2 +K ₂ n _R2 -(1+K ₂ )n _P2 ＝0

Wherein: n _S2 is the rotational speed of the rear sun gear 71 , n _R2 is the rotational speed of the rear ring gear 73 , and n _P2 is the rotational speed of the rear planetary carrier 74 .

In the first working state, since the rotating speeds of the front row ring gear 63 and the rear row planet carrier 74 are zero, and the rotation speeds of the front row planet carrier 64 and the rear row sun gear 71 are the same, so in the first working state, the hybrid The transmission ratio of the drive system is: (1+K ₁ )K ₂ .

When the hybrid drive system is in the second working state, the first clutch 41 is combined with the front ring gear 63 to transmit the power of the motor 20 to the front ring gear 63, the first brake 51 is combined with the front sun gear 61, and Lock the front sun gear 61, combine the third brake 53 with the rear planetary carrier 74, and lock the rear planetary carrier 74. At this time, the power of the drive system is passed by the motor 20 through the front ring gear 63, the front row The star wheel 62 and the front planetary carrier 64 are transmitted to the rear sun gear 71, and the rear sun gear 71 transmits power to the rear ring gear 73 through the rear planetary gear 72, and the rear ring gear 73 transmits the differential power to the rear ring gear 73 through the differential reducer 81. The decelerated power is transmitted to the drive shaft 80 to drive the vehicle. At this time, the transmission ratio of the hybrid drive system is

It can be seen from the above that by controlling the actions of the clutch system 40 and the brake system 50, the hybrid drive system can have different transmission ratios or gears in the pure electric mode, which can avoid adjusting the speed of the vehicle solely by adjusting the working speed of the motor 20. power, which takes into account the maximum speed and maximum gradeability of the vehicle, reducing the requirement on the capacity of the motor 20.

Engine driving mode: when the engine 10 works in the high-efficiency zone, the engine 10 alone drives the vehicle. At this time, the hybrid drive system can select the engine driving mode. In this mode, the three clutches 41, 42, 43 are all disengaged, and the engine 10 starts And the motor 20 stops, the first brake 51 is combined with the front row sun gear 61, and the front row sun gear 61 is locked, the second brake 52 is combined with the front row ring gear 63, and the front row ring gear 63 is locked, and the engine 10 The power is transmitted to the rear ring gear 73 through the rear planet carrier 74 and the rear planetary gear 72, and the rear ring gear 73 transmits the differentially decelerated power to the drive shaft 80 through the differential reducer 81. At this time, the system transmission ratio for

Torque coupling hybrid drive mode: when the hybrid drive system is in the torque coupling hybrid drive mode, the engine 10 works along the optimal working curve, and the insufficient power can be provided by the motor 20. At this time, the third clutch 43 is combined with the engine 10, and the engine 10 Both start with the motor 20, the first brake 51 is combined with the front row sun gear 61, and the front row sun gear 61 is locked, and the second brake 52 is combined with the front row ring gear 63, and the front row ring gear 63 is locked. At this time, the power of the motor 20 and the engine 10 is coupled through the third clutch 43 and then transmitted to the rear ring gear 73 through the rear planetary carrier 74 and the rear planetary gear 72, and the rear ring gear 73 reduces the differential speed through the differential reducer 81. The final power is transmitted to the drive shaft 80. At this time, the motor 20 is equivalent to ISG (Integrated Starter and Generator, integrated starter and generator), and the system transmission ratio in this mode is The torque at the input end of the differential speed reducer 81 is (Where: T _e is the torque of the engine 10, T _m is the torque of the motor 20, T _d is the torque of the input end of the differential reducer 81).

Continuously variable speed hybrid drive mode: When the vehicle speed changes greatly, the hybrid drive system can choose the continuously variable speed hybrid drive mode at this time, the engine 10 and the motor 20 are both started, and the engine 10 speed is stabilized by adjusting the motor 20 to follow the vehicle speed . In the continuously variable hybrid drive mode, the hybrid drive system has two working states, the third working state and the fourth working state.

When the hybrid drive system is in the third working state, the first clutch 41 is combined with the front ring gear 63 to transmit the power of the motor 20 to the front ring gear 63, the first brake 51 is combined with the front sun gear 61, and Lock the front sun gear 61, the power of the motor 20 is transmitted to the rear sun gear 71 through the front ring gear 63, the front planetary gear 62, and the front planetary carrier 64 in sequence, and the power of the engine 10 passes through the rear planetary carrier 74 Transmission to the rear planetary gear 72, the rear planetary gear mechanism 70 couples the rotation speed of the motor 20 and the engine 10 through the rear sun gear 71 and the rear planetary gear 72, and then transmits it to the rear ring gear 73, and the rear ring gear 73 passes The differential speed reducer 81 transmits the power after the differential deceleration to the drive shaft 80, and in this state the relationship between the rotational speed is (where n _o is the rotational speed after coupling, n _m is the rotational speed of the motor 20, and n _e is the rotational speed of the engine 10).

When the hybrid drive system is in the fourth working state, the second clutch 42 is combined with the front sun gear 61 to transmit the power of the motor 20 to the front sun gear 61, the second brake 52 is combined with the front ring gear 63, and Lock the front ring gear 63, at this time the power of the motor 20 is transmitted to the rear sun gear 71 through the front sun gear 61, the front planetary gear 62, and the front planetary carrier 64, and the power of the engine 10 is transmitted through the rear planetary carrier 74 is transmitted to the rear row planetary gear 72, and the rear row planetary gear mechanism 70 couples the rotation speed of the motor 20 and the engine 10 through the rear row sun gear 71 and the rear row planetary gear 72, and then transmits it to the rear row ring gear 73, and the rear row ring gear 73 The power after the differential deceleration is transmitted to the drive shaft 80 through the differential reducer 81. In this state, the relationship between the rotational speed is (where n _o is the rotational speed after coupling, n _m is the rotational speed of the motor 20, and n _e is the rotational speed of the engine 10).

In the third working state and the fourth working state, the driving shaft 80 has two different speeds after being coupled by the hybrid drive system, so the variation range of the rotating speed of the motor 20 can be reduced and the requirement on the motor 20 can be reduced.

Braking energy recovery mode: when the vehicle decelerates and brakes or goes downhill, the hybrid drive system can select the braking energy recovery mode. At this time, the engine 10 is cut off and the motor 20 works in the motor state, which can convert the kinetic energy of the vehicle into The electric energy is stored in the storage battery 30 . At this time, the action of the clutch and brake is the same as that in the pure electric mode, but its energy transmission path is opposite to that in the pure electric mode. In this mode, the hybrid drive system can realize two braking energy recovery paths, and the transmission ratio from the differential reducer 81 to the electric motor is: or

Engine start mode: when the vehicle is started, the hybrid drive system can select the engine start mode. At this time, the third clutch 43 is combined with the engine 10 so that the motor 20 can drive the engine 10 to realize the start of the engine 10 . Therefore, the vehicle with the hybrid drive system can use the motor 20 as a starter motor to start the engine 10 , which can save the starter motor and simplify the drive system.

Torque-coupled hybrid drive charging mode: when the vehicle is operating at a relatively low load and the SOC (State of Charge, state of charge) of the battery 30 is low, the hybrid drive system can select the torque-coupled hybrid drive charging mode, and the engine 10 works at this time On the best fuel economy curve, the third clutch 43 is combined with the engine 10, the first brake 51 is combined with the front sun gear 61, and the front sun gear 61 is locked, and the second brake 52 is combined with the front ring gear 63. And the front ring gear 63 is locked, and the motor 20 works in a generator state, which can convert excess kinetic energy of the engine 10 driving the vehicle into electric energy and store it in the storage battery 30 .

Parking charging mode: when the vehicle is parked and the power of the battery 30 is too low, in order to ensure that the SOC of the battery 30 is within a certain range, prevent the battery from being too low, and prolong the life of the battery 30, the engine 10 is required to drive the motor 20 to the battery 30 For charging, the parking charging mode can be used. At this time, the third clutch 43 is combined with the engine 10 , and each brake is separated. The engine 10 works at the best fuel economy point and drives the motor 20 to generate electricity, and stores the electric energy in the battery 30 .

When switching between working modes through the hybrid drive system, the overall controller of the hybrid drive system receives the state signal of the vehicle and makes a decision through intelligent analysis to determine the mode to switch. When the switching between the two working modes does not involve the switching between the power sources, that is, the working mode before switching and the working mode after switching are all powered by the engine 10, the motor 20 or both, only need to pass the clutch The controller and the brake controller control the corresponding clutches and brakes to switch; when the switch between the two working modes involves switching between power sources, that is, the working mode before switching is compared with the working mode after switching. When the power source is changed, it is necessary to start the switched power source while switching the clutch and brake. In this way, the switched power source can reach a certain torque when the switching is completed, and it can prevent the impact on the transmission parts caused by the insufficient response time of the power source when switching the working mode, thus realizing the switching between the working modes. The smoothness and response of switching between them are optimal.

Take the hybrid drive system as an example to switch the working mode of the vehicle from the first working state of the pure electric mode to the third working state of the continuously variable hybrid driving mode. When the working mode of the hybrid drive system is the first working state of the pure electric mode, before switching, the second clutch 42 is combined with the front sun gear 61, the second brake 52 locks the front ring gear 63, and the third The brake 53 locks the rear row planetary carrier 74, the power of the vehicle is input by the motor 20 through the front row sun gear 61, and drives the front row planetary wheel 62 to rotate, and the front row planetary wheel 62 transmits the power to the rear row through the front row planetary carrier 64 The sun gear 71 and the rear sun gear 71 transmit power to the rear ring gear 73 through the rear planetary gear 72 , and the rear ring gear 73 transmits the differentially decelerated power to the drive shaft 80 through the differential reducer 81 . The general controller of the hybrid drive system receives the SOC signal of the battery 30, the vehicle speed signal and the accelerator pedal signal, and through intelligent decision-making, issues a switch from the first working state of the pure electric mode to the third working state of the continuously variable hybrid drive mode At this time, the master controller combines the first clutch 41 with the front ring gear 63 through the clutch controller, and the second clutch 42 separates from the front sun gear 61. At the same time, the brake controller controls the first brake 51 to combine the front The sun gear 61 is locked, the second brake 52 is separated from the front ring gear 63, so that the front ring gear 63 is out of the locked state, the third brake 53 is separated from the rear planetary carrier 74, and the rear planetary carrier 74 is released from the lock In the stop state, when starting to switch, the general controller starts the engine 10 immediately, so that the engine 10 can have a certain torque when the switch is completed, and can prevent the lack of response time of the engine 10 when the working mode is switched. The impact of other vehicle components, so as to achieve the smoothness and optimal response of the working mode switching.

To sum up, the hybrid drive system provided by the present invention cleverly couples the power of the engine and the motor together through the rational layout of the power coupling system, the three-clutch and the double-row planetary gear mechanism, uses a single motor and controls the power of the three-clutch With the action of three brakes, the speed and torque coupling of the hybrid drive system can be realized, which reduces the complexity of the system and realizes multiple working modes. The layout is simple, the structure is compact, the weight is light, and the fuel economy of the vehicle is provided. It can reduce emissions, and at the same time, it can realize the smoothness and optimal response of the working mode switching, avoiding the problem of complex layout and high cost caused by the use of dual motors, and using three clutches to realize the power switching of different working modes, as well as dual clutches It has the characteristics and can well make up for the deficiency of the dual-clutch interface.

The present invention also provides a hybrid vehicle, including the vehicle hybrid drive system as described above. For other structures of the hybrid vehicle, reference may be made to the prior art, which will not be repeated here.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, may use the technical content disclosed above to make some changes or modify them into equivalent embodiments with equivalent changes, but as long as they do not depart from the technical solution of the present invention, the Technical Essence Any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solution of the present invention.

Claims (10)

1. A vehicle hybrid drive system, characterized in that: comprising engine (10), motor (20), storage battery (30), clutch system (40), braking system (50), front planetary gear mechanism (60) ), rear row planetary gear mechanism (70) and drive shaft (80), described front row planetary gear mechanism (60) includes front row sun gear (61), front row planetary gear (62), front row ring gear (63 ) and the front planetary carrier (64), the rear planetary gear mechanism (70) includes the rear sun gear (71), the rear planetary gear (72), the rear ring gear (73) and the rear planetary carrier ( 74), the front planetary carrier (64) is fixedly connected with the rear row sun gear (71), the output shaft of the engine (10) is fixedly connected with the rear row planetary carrier (74), and the rear row A differential speed reducer (81) is provided between the row planetary gear mechanism (70) and the drive shaft (80), and the rear ring gear (73) communicates with the drive shaft ( 80), the drive shaft (80) transmits power to the wheels (90), the battery (30) is connected to the motor (20), and the clutch system (40) includes a first clutch (41), The second clutch (42) and the third clutch (43), the motor (20) is connected with the front ring gear (63) through the first clutch (41), and the motor (20) is connected through the The second clutch (42) is connected with the front sun gear (61), the motor (20) is connected with the output shaft of the engine (10) through the third clutch (43), and the brake system (50) Braking components in the front row planetary gear mechanism (60) and the rear row planetary gear mechanism (70). 2. The vehicle hybrid drive system according to claim 1, characterized in that: the braking system (50) comprises a first brake (51), a second brake (52) and a third brake (53), the The first brake (51) is connected with the front sun gear (61) and used to lock the front sun gear (61), the second brake (52) is connected with the front ring gear (63) connected and used to lock the front row ring gear (63), and the third brake (53) is connected to the rear row planet carrier (74) and used to lock the rear row planet carrier (74). 3. The vehicle hybrid drive system according to claim 1, characterized in that: the engine (10), the motor (20), the first clutch (41), and the second clutch (42) , the third clutch (43), the front row planetary gear mechanism (60) and the rear row planetary gear mechanism (70) are arranged coaxially. 4. The vehicle hybrid drive system according to claim 1, characterized in that: the vehicle hybrid drive system further comprises a vehicle hybrid drive system general controller, a clutch controller and a brake controller, the total control The controller controls the start and stop of the engine (10) and the motor (20), and the clutch controller and the brake controller respectively control the clutch system (40) and the brake system (50) union and separation. 5. The vehicle hybrid drive system according to claim 2, characterized in that: the vehicle hybrid drive system has a pure electric mode, and in the pure electric mode, the vehicle is only driven by the electric motor (20) to travel , the vehicle has two working states, the first working state and the second working state; in the first working state, the second clutch (42) is combined with the front row sun gear (61), and the first The second brake (52) locks the front ring gear (63), and the third brake (53) locks the rear planet carrier (74); when in the second working state, the The first clutch (41) is combined with the front ring gear (63), the first brake (51) locks the front sun gear (61), and the third brake (53) locks the rear planetary The frame (74) is locked. 6. The vehicle hybrid drive system according to claim 2, characterized in that: the vehicle hybrid drive system has an engine (10) drive mode, and in the engine (10) drive mode, the first clutch (41), the second clutch (42) and the third clutch (43) are disengaged, the engine (10) starts and the motor (20) stops, the first brake (51) will The row sun gear (61) is locked, and the second brake (52) locks the front ring gear (63). 7. The vehicle hybrid driving system according to claim 2, characterized in that: the vehicle hybrid driving system has a torque coupling hybrid driving mode, and in the torque coupling hybrid driving mode, the third clutch (43 ) is combined with the engine (10), the engine (10) and the motor (20) are both started, the first brake (51) locks the front sun gear (61), and the first Two brakes (52) lock the front ring gear (63). 8. The vehicle hybrid driving system according to claim 2, characterized in that: the vehicle hybrid driving system has a continuously variable hybrid driving mode, and in the continuously variable hybrid driving mode, the engine (10 ) and the motor (20) are both started, and the vehicle has two working states, the third working state and the fourth working state; when in the third working state, the first clutch (41) and the front row The ring gear (63) is combined, and the first brake (51) locks the front sun gear (61); in the fourth working state, the second clutch (42) and the front The row sun gear (61) is combined, and the second brake (52) locks the front row ring gear (63). 9. The vehicle hybrid drive system according to claim 2, characterized in that: the vehicle hybrid drive system has a torque coupling hybrid drive charging mode, and in the torque coupling hybrid drive charging mode, the third clutch (43) Combined with the engine (10), the first brake (51) locks the front sun gear (61), and the second brake (52) locks the front ring gear (63 ) lock, the motor (20) works in a generator (20) state and can convert excess kinetic energy of the engine (10) driving the vehicle into electrical energy and store it in the storage battery (30). 10. A hybrid vehicle, characterized by comprising the vehicle hybrid drive system according to any one of claims 1-9.