Hybrid electric vehicle driving system and hybrid electric vehicle

Abstract

The utility model provides a hybrid electric vehicle driving system and a hybrid electric vehicle, and relates to the technical field of driving, the hybrid electric vehicle driving system is used for conveying power to a wheel assembly of a vehicle, and the driving system comprises an engine and a motor; the change gear set and the reduction gear set are arranged between the engine and the motor, and the input part of the reduction gear set is connected with the output end of the motor; the output end of the engine, the input part of the change gear set and the input part of the reduction gear set are connected through the first clutch transmission mechanism; the output part of the change gear set, the output part of the reduction gear set and the input part of the wheel assembly are connected through the second clutch transmission mechanism; the battery is electrically connected with the motor; the transmission system can realize variable-speed driving of the engine, enlarges the vehicle speed range in which the engine directly participates in driving, and simultaneously realizes full utilization of kinetic energy of the engine.

Description

TECHNICAL FIELD

[0001] The utility model belongs to drive technical field, more specifically, it relates to a kind of hybrid electric vehicle drive system and hybrid electric vehicle. BACKGROUND

[0002] Current hybrid electric vehicle product market acceptance is rapidly increasing, but the system cost of prior art scheme is too high, and it is still difficult to completely replace fuel vehicle. Compared with pure fuel vehicle, the cost of hybrid electric vehicle and plug-in hybrid electric vehicle includes battery, motor, power coupling and transmission system, fuel evaporation pollutant control system and the like. The motor cost ratio is second only to battery, and is one of the main factors affecting the vehicle cost.

[0003] The current common hybrid electric vehicle technology configuration includes three major categories of THS system of planetary gear coupling, P2 system based on large torque automatic transmission and P13 system based on double motor, and the P13 series-parallel system is the largest currently. But P13 series-parallel system has two motors, which are main motor and auxiliary motor, the main motor is the main driving motor, the auxiliary motor is the motor for generating electricity, and according to the situation, it can also be auxiliary driving, and the engine speed is too low when driving at low speed (such as below 50 kilometers per hour), and the output torque is small, so it cannot directly drive the vehicle through the reduction gear set in the P13 series-parallel system, and therefore only pure electric series driving mode can be used.

[0004] As known, the driving output torque curve of engine is completely different from that of motor, the engine has no power output at idle speed, and the engine can cover a relatively narrow speed range under fixed speed ratio, so the engine in P13 series-parallel system can only be directly connected to drive when the vehicle speed is greater than 40 kilometers per hour or even greater than 60 kilometers per hour. If the vehicle needs to be in low-speed driving state for a long time, the battery power will be depleted, so the engine can only form a generator set with the auxiliary motor to provide power for the driving motor and the battery. This process has a large efficiency loss because of the continuous conversion of kinetic energy to electric energy and then to kinetic energy. In addition, the P13 series-parallel system needs to arrange the auxiliary motor, which leads to a larger size in the axial direction of the P13 series-parallel system, and it is difficult to arrange in some vehicle models. In addition, the cost of motor manufacturing is high, which leads to the increase of the cost of the entire series-parallel system.

[0005] Therefore, the purpose of the utility model is to provide a hybrid power coupling transmission arrangement scheme which has a simpler structure than series-parallel system, can efficiently and directly drive the vehicle in a wider speed range, and has a lower design cost, so as to further reduce the manufacturing cost of hybrid electric vehicle. UTILITY MODEL CONTENTS

[0006] The utility model discloses a kind of hybrid electric vehicle drive systems and hybrid electric vehicles, to solve the problem that the existing P13 series parallel system in hybrid electric vehicle in the above background technology is arranged difficultly and the manufacturing cost is higher when vehicle low-speed travel, engine cannot directly drive vehicle, only the kinetic energy of engine is converted to electric energy and then converted to kinetic energy, efficiency loss is larger, engine kinetic energy is not fully utilized.

[0007] To achieve the above object, the utility model provides a kind of hybrid electric vehicle drive systems, for conveying power to the wheel assembly of automobile, characterized in that, the drive system includes:

[0008] Engine and motor;

[0009] Speed change gear set and reduction gear set, the speed change gear set and the reduction gear set are arranged between the engine and the motor, the input portion of the reduction gear set is connected with the output end of the motor;

[0010] First clutch transmission mechanism, the output end of the engine, the input portion of the speed change gear set and the input portion of the reduction gear set are connected by first clutch transmission mechanism;

[0011] Second clutch transmission mechanism, the output portion of the speed change gear set, the output portion of the reduction gear set and the input portion of the wheel assembly are connected by second clutch transmission mechanism;

[0012] Battery, the battery is electrically connected with the motor.

[0013] Preferably, the first clutch transmission mechanism includes input shaft and gear shifting mechanism, and the input portion of the speed change gear set and the input portion of the reduction gear set are connected with the input shaft respectively by the gear shifting mechanism.

[0014] Preferably, the first clutch transmission mechanism includes input shaft and a first clutch, and the input portion of the speed change gear set is connected with the input shaft, and the input portion of the reduction gear set and the input shaft are connected by the first clutch.

[0015] Preferably, the first clutch transmission mechanism includes input shaft and two first clutches, and the input portion of the speed change gear set and the input shaft are connected by one of the first clutches, and the input portion of the reduction gear set and the input shaft are connected by the other first clutch.

[0016] Preferably, the second clutch transmission mechanism includes output shaft and a second clutch, and the output portion of the speed change gear set is connected with the output shaft, and the output portion of the reduction gear set and the output shaft are connected by the second clutch.

[0017] Preferably, the second clutch transmission mechanism comprises an output shaft and two second clutches, the output of the variable speed gear set and the output shaft are connected through one of the second clutches, and the output of the reduction gear set and the output shaft are connected through the other second clutch.

[0018] Preferably, the variable speed gear set comprises a driving variable speed gear and a driven variable speed gear, the driving variable speed gear and the driven variable speed gear are meshed and connected, the driving variable speed gear is the input of the variable speed gear set, and the driven variable speed gear is the output of the variable speed gear set.

[0019] Preferably, the reduction gear set comprises a driving reduction gear and a driven reduction gear, the driving reduction gear and the driven reduction gear are meshed and connected, the driving reduction gear is the input of the reduction gear set, and the driven reduction gear is the output of the reduction gear set.

[0020] Preferably, when the motor is arranged on the side of the input shaft, the hybrid electric vehicle driving system further comprises a transmission gear set, and the output end of the motor and the input of the reduction gear set are connected through the transmission gear set.

[0021] A hybrid electric vehicle comprises a hybrid electric vehicle driving system.

[0022] The hybrid electric vehicle driving system has the advantages that the output end of the engine, the input of the variable speed gear set and the input of the reduction gear set are connected through the first clutch transmission mechanism, the variable speed gear set has a different transmission ratio compared with the reduction gear set, the input of the variable speed gear set can be engaged with the output end of the engine through the first clutch transmission mechanism, the output of the variable speed gear set and the output of the reduction gear set are engaged through the second clutch transmission mechanism, and the engine participates in power output through the variable speed gear set at this time.

[0023] When the hybrid electric vehicle is purely electrically driven, the first clutch transmission mechanism disconnects the transmission of the variable speed gear set and the reduction gear set and the input shaft, the first clutch transmission mechanism is in a neutral state at this time, the output end of the engine is disconnected with the input of the variable speed gear set, the output of the variable speed gear set and the output of the reduction gear set are engaged through the second clutch transmission mechanism, and the motor realizes power output through the reduction gear set.

[0024] When the hybrid vehicle is in hybrid driving, the output end of the engine is connected with the input part of the reduction gear set through the first clutch transmission mechanism, the output end of the engine is still disconnected with the input part of the variable speed gear set, the output part of the variable speed gear set and the output part of the reduction gear set are engaged through the second clutch transmission mechanism, the power of the engine and the power of the motor are simultaneously output through the reduction gear set;

[0025] When the hybrid vehicle is in hybrid driving, the output end of the engine is connected with the input part of the reduction gear set through the first clutch transmission mechanism, the output end of the engine is still disconnected with the input part of the variable speed gear set, the output part of the variable speed gear set and the output part of the reduction gear set are engaged through the second clutch transmission mechanism, the power of the engine and the power of the motor are simultaneously output through the reduction gear set;

[0026] When the hybrid vehicle is in engine-only driving, the output end of the engine is connected with the input part of the variable speed gear set through the first clutch transmission mechanism, the output part of the variable speed gear set and the output part of the reduction gear set are disconnected through the second clutch transmission mechanism, at this time, the engine drives the hybrid vehicle through the variable speed gear set;

[0027] When the hybrid vehicle is in parking state, the output end of the engine is connected with the input part of the reduction gear set through the first clutch transmission mechanism, the output part of the variable speed gear set and the output part of the reduction gear set are disconnected through the second clutch transmission mechanism, at this time, the engine and the motor form a generator set, and do not participate in the driving of the battery and other equipment on the vehicle.

[0028] The variable speed gear set of the transmission system replaces the auxiliary motor in the existing P13 series-parallel system, can directly realize the conversion of kinetic energy to kinetic energy, reduces the efficiency loss, and utilizes the switching of the first clutch transmission mechanism to compensate for the problem that the engine can participate in driving at a small speed range due to the mismatch of the engine speed, and utilizes the switching of the second clutch transmission mechanism to disconnect the driving motor transmission under suitable conditions, reduces the energy loss caused by the motor idling, realizes the full utilization of the engine kinetic energy, saves the cost, reduces the weight, and reduces the space volume.

[0029] Other features and advantages of the present application will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0030] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which like reference characters refer to like parts throughout the figures, and in which:

[0031] Figure 1 Fig. 1 shows a schematic diagram of a structure of a hybrid vehicle drive system according to an embodiment of the present application Figure 1 ;

[0032] Figure 2 Fig. 1 shows a schematic diagram of a structure of a hybrid vehicle drive system according to an embodiment of the present application Figure 2 ;

[0033] Figure 3 Fig. 1 shows a schematic diagram of a structure of a hybrid vehicle drive system according to an embodiment of the present application Figure 3 .

[0034] BRIEF DESCRIPTION OF DRAWINGS

[0035] 1, engine; 2, motor; 3, input shaft; 4, first clutch; 5, output shaft; 6, second clutch; 7, driving variable speed gear; 8, driven variable speed gear; 9, driving reduction gear; 10, driven reduction gear; 11, wheel assembly; 12, driving transmission gear; 13, driven transmission gear; 14, driving transmission gear; 15, driven transmission gear; 16, gear shifting mechanism. DETAILED DESCRIPTION

[0036] Preferred embodiments of the present application will be described in more detail below. Although the following describes preferred embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application is more thoroughly and completely conveyed to those skilled in the art, and so that the scope of the present application is fully conveyed to those skilled in the art.

[0037] As shown in Figures 1-3 , the present application provides a hybrid vehicle drive system for delivering power to a wheel assembly 14 of a vehicle, the drive system comprising:

[0038] an engine 1 and a motor 2;

[0039] a variable speed gear set and a reduction gear set, the variable speed gear set and the reduction gear set being disposed between the engine 1 and the motor 2, an input portion of the reduction gear set being connected to an output end of the motor 2;

[0040] The output end of the engine 1, the input part of the variable speed gear set and the input part of the reduction gear set are connected through the first clutch transmission mechanism;

[0041] The second clutch transmission mechanism connects the output part of the variable speed gear set, the output part of the reduction gear set and the input part of the wheel assembly 11;

[0042] The battery is electrically connected with the motor 2.

[0043] Specifically, to solve the problems of the existing P13 series-parallel system in the hybrid electric vehicle, the engine cannot directly drive the vehicle when the vehicle is running at low speed, the engine kinetic energy can only be converted into electric energy and then converted into kinetic energy, the efficiency loss is large, the engine kinetic energy cannot be fully utilized, and the P13 series-parallel system also has the problems of difficult arrangement and high manufacturing cost, the utility model provides a kind of hybrid electric vehicle drive system, the output end of the engine 1 of the drive system, the input part of the variable speed gear set and the input part of the reduction gear set are connected through the first clutch transmission mechanism, the variable speed gear set can be matched and designed according to the specific parameters of vehicle and power source, the variable speed gear set can provide two different transmission ratios for the engine 1, for example, under the condition that the transmission ratio of the variable speed gear set is greater than that of the reduction gear set, when the hybrid electric vehicle is lower than the preset speed, the input part of the variable speed gear set is engaged with the output end of the engine 1 by the first clutch transmission mechanism, and the output part of the variable speed gear set and the output part of the reduction gear set are engaged by the second clutch transmission mechanism, at this time, the engine 1 participates in power output through the variable speed gear set, and the preset speed of the drive system can be 50 kilometers per hour;

[0044] When the hybrid electric vehicle is running purely by electricity, the first clutch transmission mechanism is adjusted to disengage the variable speed gear set from the input shaft 3, and the reduction gear set is disengaged from the input shaft 3, at this time, the first clutch transmission mechanism is in neutral state, the output end of the engine 1 is disconnected from the input part of the variable speed gear set, the output part of the variable speed gear set and the output part of the reduction gear set are engaged by the second clutch transmission mechanism, and the motor 2 realizes power output through the reduction gear set;

[0045] When the hybrid electric vehicle is in hybrid power running, the output end of the engine 1 is connected with the input part of the reduction gear set through the first clutch transmission mechanism, at this time, the output end of the engine 1 is still disconnected from the input part of the variable speed gear set, the output part of the variable speed gear set and the output part of the reduction gear set are engaged by the second clutch transmission mechanism, and the power of the engine 1 and the power of the motor 2 realize power output through the reduction gear set at the same time;

[0046] When the hybrid vehicle is in the hybrid driving mode, the output end of the engine 1 is connected to the input part of the variable speed gear set through the first clutch transmission mechanism, the output end of the engine 1 is still disconnected from the input part of the reduction gear set, the output part of the variable speed gear set is engaged with the output part of the reduction gear set through the second clutch transmission mechanism, the power of the engine 1 is transmitted through the variable speed gear set, the power of the motor 2 is transmitted through the reduction gear set, and the engine 1 and the motor 2 will simultaneously realize power output;

[0047] When the hybrid vehicle is in the engine-only driving mode, the output end of the engine 1 is connected to the input part of the variable speed gear set through the first clutch transmission mechanism, the output part of the variable speed gear set is disconnected from the output part of the reduction gear set through the second clutch transmission mechanism, and the engine 1 drives the hybrid vehicle through the variable speed gear set at this time.

[0048] When the hybrid vehicle is in the parking state, the output end of the engine 1 is connected to the input part of the reduction gear set through the first clutch transmission mechanism, the output part of the variable speed gear set is disconnected from the output part of the reduction gear set through the second clutch transmission mechanism, and the engine 1 and the motor 2 form a generator set at this time, which does not participate in the driving condition to supply power to the battery and other equipment on the vehicle.

[0049] The variable speed gear set of the transmission system replaces the auxiliary motor in the existing P13 series-parallel system, can directly realize the transmission of kinetic energy to kinetic energy, reduces the loss of energy conversion efficiency, and uses the switching of the clutch transmission mechanism to make up for the problem that the engine 1 can participate in driving at a small speed range due to the mismatch of the engine 1 speed, and at the same time, the clutch transmission mechanism is used to realize the full use of the engine 1 kinetic energy, saving cost, reducing weight, and reducing space volume.

[0050] Preferably, the first clutch transmission mechanism includes an input shaft 3 and a shifting mechanism 16, and the input part of the variable speed gear set and the input part of the reduction gear set are connected to the input shaft 3 through the first shifting mechanism 16.

[0051] Specifically, the shifting mechanism 16 can disconnect or engage the input part of the variable speed gear set and the input shaft 3, or can disconnect or engage the input part of the reduction gear set and the input shaft 3, or can disconnect the input part of the variable speed gear set and the input part of the reduction gear set and the input shaft 3 at the same time.

[0052] Preferably, the first clutch transmission mechanism includes an input shaft 3 and a first clutch 4, the input part of the variable speed gear set is connected to the input shaft 3, and the input part of the reduction gear set is connected to the input shaft 3 through the first clutch 4.

[0053] Specifically, the shifting of the first clutch 4 can disconnect or connect the input of the reduction gear set and the input shaft 3.

[0054] Preferably, the embodiment 3 of the first clutch transmission mechanism: the first clutch transmission mechanism comprises an input shaft and two first clutches 4, the input of the variable speed gear set and the input shaft 3 are connected through one of the first clutches 4, and the input of the reduction gear set and the input shaft 3 are connected through the other first clutch 4.

[0055] Specifically, the shifting of one of the first clutches 4 can disconnect or connect the input of the variable speed gear set and the input shaft 3, and the shifting of the other first clutch 4 can disconnect or connect the input of the reduction gear set and the input shaft 3.

[0056] Preferably, the embodiment 1 of the second clutch transmission mechanism: the second clutch transmission mechanism comprises an output shaft 5 and one second clutch 6, the output of the variable speed gear set is connected to the output shaft 5, and the output of the reduction gear set and the output shaft 5 are connected through the second clutch 6.

[0057] Specifically, the shifting of the second clutch 6 can disconnect or connect the output of the reduction gear set and the output shaft 5.

[0058] Preferably, the embodiment 2 of the second clutch transmission mechanism: the second clutch transmission mechanism comprises an output shaft 5 and two second clutches 6, the output of the variable speed gear set and the output shaft 5 are connected through one of the second clutches 6, and the output of the reduction gear set and the output shaft 5 are connected through the other second clutch 6.

[0059] Specifically, the shifting of one of the second clutches 6 can disconnect or connect the output of the variable speed gear set and the output shaft 5, and the shifting of the other second clutch 6 can disconnect or connect the output of the reduction gear set and the output shaft 5.

[0060] Preferably, the variable speed gear set comprises a driving variable speed gear 7 and a driven variable speed gear 8, the driving variable speed gear 7 and the driven variable speed gear 8 are meshed and connected, the driving variable speed gear 7 is the input of the variable speed gear set, and the driven variable speed gear 8 is the output of the variable speed gear set.

[0061] The reduction gear set comprises a driving reduction gear 9 and a driven reduction gear 10, the driving reduction gear 9 and the driven reduction gear 10 are meshed and connected, the driving reduction gear 9 is the input of the reduction gear set, and the driven reduction gear 10 is the output of the reduction gear set.

[0062] Specifically, the driving variable speed gear 7 and the driven variable speed gear 8 can realize the power transmission between the input shaft 3 and the output shaft 5, and the driving reduction gear 9 and the driven reduction gear 10 can realize the power transmission between the motor 2 and the output shaft 5.

[0063] Preferably, the hybrid vehicle drive system further comprises a transmission gear set, the output shaft 5 is connected with the wheel assembly 11 through the transmission gear set.

[0064] Specifically, the transmission gear set is used to realize power transmission between the output shaft 5 and the wheel assembly 11.

[0065] Preferably, the transmission gear set comprises a driving transmission gear 12 and a driven transmission gear 13, the driving transmission gear 12 and the driven transmission gear 13 are meshed and connected, the driving transmission gear 12 is connected with the output shaft 5, and the driven transmission gear 13 is connected with the wheel assembly 11.

[0066] Specifically, the driving transmission gear 12 and the driven transmission gear 13 are used to realize power transmission between the input shaft 3 and the wheel assembly 11.

[0067] Preferably, when the motor is arranged on the side of the input shaft, the hybrid vehicle drive system further comprises a transmission gear set, the output end of the motor 2 is connected with the reduction gear set through the transmission gear set.

[0068] Preferably, the transmission gear set comprises a driving transmission gear 14 and a driven transmission gear 15, the driving transmission gear 14 and the driven transmission gear 15 are meshed and connected, the driving transmission gear 14 is connected with the output end of the motor 2, and the driven transmission gear 15 is connected with the driving reduction gear 9.

[0069] Specifically, the motor 2 is connected with the reduction gear set through the transmission gear set, which is beneficial to shorten the axial length of the system and facilitate the internal arrangement of the hybrid vehicle.

[0070] Preferably, the first clutch 4 and the second clutch 6 can be replaced by a synchronizer shift device, a meshing sleeve shift device or a clutch combination.

[0071] Preferably, the transmission ratio of the transmission gear set is greater than that of the reduction gear set.

[0072] Specifically, when the engine rotates at a low speed, the hybrid vehicle generally adopts a pure electric mode, in order to realize that the engine 1 directly participates in the output of kinetic energy, the transmission gear set with a transmission ratio greater than that of the reduction gear set is added, so as to avoid the problem that the engine 1 cannot drive the reduction gear set to rotate.

[0073] Preferably, the transmission ratio of the transmission gear set is less than that of the reduction gear set.

[0074] Specifically, the transmission gear set selects a technical scheme with a transmission ratio less than that of the reduction gear set, which focuses on the optimization of fuel consumption of the engine 1 under the condition of high-speed driving, and is suitable for the configuration of the vehicle power system with a relatively large power of the driving motor 2.

[0075] As Figure 1 As shown in the figure, preferably, the scheme one of the application: the first clutch transmission mechanism embodiment 1 and the second clutch transmission mechanism embodiment 1 are used as the transmission system of the application.

[0076] As Figure 2 As shown in the figure, preferably, the scheme two of the application: the first clutch transmission mechanism embodiment 3 and the second clutch transmission mechanism embodiment 1 are used as the transmission system of the application.

[0077] Specifically, the scheme two of the application compared with the scheme one of the application adopts two first clutches 4, firstly, the scheme one can be realized, the transmission path of the motor 2 driving the vehicle through the variable speed gear set can be realized, secondly, when the transmission ratio of the variable speed gear set is less than the transmission ratio of the reduction gear set, the scheme can realize the fuel consumption optimization of the engine 1 under the high speed driving condition, and is suitable for the vehicle power system configuration condition that the power of the driving motor 2 is relatively large.

[0078] As Figure 3 As shown in the figure, preferably, the scheme three of the application: the first clutch transmission mechanism embodiment 2 and the second clutch transmission mechanism embodiment 2 are used as the transmission system of the application.

[0079] Specifically, the scheme three of the application compared with the scheme two of the application adopts one first clutch 4 and two second clutches 6, and increases one transmission gear set, which has the beneficial effects of further shortening the axial length of the system, facilitating the internal arrangement, and secondly, arranging two second clutches 6, which has the same function as the scheme two, and can be flexibly designed according to the actual situation in the specific embodiment.

[0080] A hybrid electric vehicle comprises a hybrid electric vehicle drive system.

[0081] Preferably, the hybrid electric vehicle further comprises a wheel assembly 11, the wheel assembly 11 comprising a differential, a reducer and a wheel, and the transmission gear set can be the gear of the reducer.

[0082] In summary, when the hybrid electric vehicle drive system of the utility model is implemented on the hybrid electric vehicle, the power of the engine 1 can be realized to drive the hybrid electric vehicle through different gears and clutches, the speed range of the engine 1 that can directly participate in driving is expanded, and the kinetic energy of the engine 1 is fully utilized, compared with the prior art scheme, the P13 series-parallel system is optimized in a large range, one large-size, heavy-weight and high-cost auxiliary motor is reduced, a pair of variable speed gears, at least one clutch and a gear shifting mechanism are increased, and great beneficial effects are produced.

[0083] A generator relates to motor stator, motor driver, motor heat dissipation and electromagnetic system design, the current device cost is more than 3000 yuan, and the motor volume, weight is big, lead to system axial length is difficult to control, many vehicle types are difficult to arrange. The original P13 series-parallel system is optimized, and the variable speed gear set is arranged, so that the hybrid electric vehicle no longer needs the auxiliary motor, and the driving function of the auxiliary motor is replaced. The cost of a pair of variable speed gear, clutch and gear shifting mechanism is only a few hundred yuan, the axial size can be controlled within dozens of millimeters, and the weight is only a few kilograms (for example, a passenger car). Therefore, the utility model has lower cost, lighter weight and smaller size.

[0084] The above has described various embodiments of the utility model, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A hybrid vehicle drive system for delivering power to a vehicle wheel assembly, characterized by, The drive system comprises: an engine and an electric motor; a variable speed gear set and a reduction gear set, the variable speed gear set and the reduction gear set being arranged between the engine and the electric motor, an input of the reduction gear set being connected to an output of the electric motor; a first clutching mechanism, an output of the engine, an input of the variable speed gear set and an input of the reduction gear set being connected through the first clutching mechanism; a second clutching mechanism, an output of the variable speed gear set, an output of the reduction gear set and an input of the wheel assembly being connected through the second clutching mechanism; a battery, the battery being electrically connected to the electric motor.

2. The hybrid vehicle drive system according to claim 1, characterized by The first clutching mechanism comprises an input shaft and a gear shifting mechanism, the input of the variable speed gear set and the input of the reduction gear set are both connected to the input shaft through the gear shifting mechanism.

3. The hybrid vehicle drive system according to claim 1, characterized by The first clutching mechanism comprises an input shaft and a first clutch, the input of the variable speed gear set is connected to the input shaft, the input of the reduction gear set is connected to the input shaft through the first clutch.

4. The hybrid vehicle drive system according to claim 1, characterized by The first clutching mechanism comprises an input shaft and two first clutches, the input of the variable speed gear set is connected to the input shaft through one of the first clutches, the input of the reduction gear set is connected to the input shaft through the other first clutch.

5. The hybrid vehicle drive system according to claim 2 or 4, characterized by The second clutching mechanism comprises an output shaft and a second clutch, the output of the variable speed gear set is connected to the output shaft, the output of the reduction gear set is connected to the output shaft through the second clutch.

6. The hybrid vehicle drive system according to claim 3, wherein The second clutching mechanism comprises an output shaft and two second clutches, the output of the variable speed gear set is connected to the output shaft through one of the second clutches, the output of the reduction gear set is connected to the output shaft through the other second clutch.

7. The hybrid vehicle drive system according to claim 1, characterized by The variable speed gear set comprises a driving variable speed gear and a driven variable speed gear, the driving variable speed gear and the driven variable speed gear are meshed, the driving variable speed gear is the input of the variable speed gear set, the driven variable speed gear is the output of the variable speed gear set.

8. The hybrid vehicle drive system according to claim 1, characterized by, The reduction gear set comprises a driving reduction gear and a driven reduction gear, the driving reduction gear and the driven reduction gear are meshed, the driving reduction gear is the input of the reduction gear set, the driven reduction gear is the output of the reduction gear set.

9. A hybrid vehicle characterized by comprising: A hybrid vehicle drive system comprising a variable speed gear set and a reduction gear set, the variable speed gear set and the reduction gear set being arranged between an engine and an electric motor, an input of the reduction gear set being connected to an output of the electric motor, an output of the variable speed gear set, an output of the reduction gear set and an input of the wheel assembly being connected through a second clutching mechanism, an output of the engine, an input of the variable speed gear set and an input of the reduction gear set being connected through a first clutching mechanism, a battery, the battery being electrically connected to the electric motor.

Images