Four-wheel-drive hybrid electric vehicle system and four-wheel-drive hybrid electric vehicle

Abstract

The utility model provides a four-wheel-drive hybrid electric vehicle system and a four-wheel-drive hybrid electric vehicle, which are used for conveying power to two pairs of wheels of the vehicle, the two wheels of one pair of wheels are connected through a speed reduction differential mechanism, the two wheels of the other pair of wheels are connected through an electric drive axle, and the system comprises a motor and an engine, the motor and the engine are arranged at intervals; the output end of the motor is connected with the output end of the engine through the first transmission clutch mechanism; the output end of the motor is connected with the speed reduction differential mechanism through the second transmission clutch mechanism; the battery is electrically connected with the motor and the electric drive axle; according to the system, the engine, the motor connected with the engine and the pure electric drive axle form a flexibly-driven four-wheel-drive hybrid electric vehicle system, and compared with the prior art, due to the fact that one motor is omitted, the manufacturing cost is lower, the weight is lighter, and the size is smaller.

Description

TECHNICAL FIELD

[0001] The utility model belongs to power transmission technical field, more specifically, it relates to a kind of four-wheel drive hybrid electric vehicle system and four-wheel drive 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 common hybrid four-wheel drive vehicle currently generally consists of an electric drive axle and a hybrid drive system. There are mainly three categories including THS system including planetary gear coupling, P2 system based on large torque automatic transmission and P13 system based on double motor series-parallel connection. At present, the largest P13 series-parallel system is installed. However, P13 series-parallel system has two motors, because P13 series-parallel system cannot guarantee that engine can participate in driving at all vehicle speeds. If the vehicle is in low-speed driving for a long time, the vehicle must rely on electric drive, and the amount of power stored in the battery is limited, so one motor in P13 series-parallel system must work as a generator with the engine to power the electric drive system, i.e. series running mode. At this time, because two motors need to be arranged in the system, it will lead to larger axial size of four-wheel drive hybrid electric vehicle system, and will cause arrangement difficulty on some vehicle models. In addition, the manufacturing cost of motor is higher, which will increase the cost of entire four-wheel drive hybrid electric vehicle system.

[0004] Therefore, the purpose of the utility model is to provide a hybrid power coupling transmission arrangement scheme with simpler structure and lower cost than P13 series-parallel system, to further reduce the manufacturing cost of four-wheel drive hybrid electric vehicle system. UTILITY MODEL CONTENTS

[0005] The utility model aims at the existing technical deficiencies, provides a kind of four-wheel drive hybrid electric vehicle system and four-wheel drive hybrid electric vehicle to solve the problems of existing four-wheel drive hybrid electric vehicle system in the above background technology, to avoid power consumption when electric drive, two motors are arranged in the system, and arrangement difficulty will occur on some vehicle models, and the manufacturing cost is increased.

[0006] In order to achieve the above purpose, the utility model provides a kind of four-wheel drive hybrid electric vehicle system, which is used to deliver power to two pairs of vehicle wheels of automobile, two vehicle wheels of one pair of vehicle wheels are connected by reduction differential mechanism, and two vehicle wheels of another pair of vehicle wheels are connected by electric drive axle, and the system comprises:

[0007] a motor and an engine, the motor and the engine being arranged in a spaced manner;

[0008] a first transmission clutch mechanism, an output end of the motor and an output end of the engine being connected through the first transmission clutch mechanism;

[0009] a second transmission clutch mechanism, the output end of the motor and the reduction differential mechanism being connected through the second transmission clutch mechanism;

[0010] a battery, the battery being electrically connected with the motor and the electric drive axle.

[0011] Preferably, the first transmission clutch mechanism comprises:

[0012] an input shaft;

[0013] a first clutch, the input shaft and the output end of the engine being connected through the first clutch.

[0014] Preferably, the second transmission clutch mechanism comprises:

[0015] an output shaft;

[0016] a first gear set, the output shaft and the reduction differential mechanism being connected through the first gear set;

[0017] a second gear set, the second gear set being connected with the input shaft;

[0018] a second clutch, the first gear set and the second gear set being connected through the output shaft and the second clutch.

[0019] Preferably, when the motor and the engine are arranged in a spaced manner, the output end of the motor is connected with the input shaft.

[0020] Preferably, when the motor is arranged at the side of the input shaft, the first transmission clutch mechanism further comprises a third gear set, the output end of the motor and the output shaft being connected through the third gear set.

[0021] Preferably, when the motor is arranged at the side of the input shaft, the first transmission clutch mechanism further comprises a transmission gear, the output end of the motor being connected with the transmission gear, the transmission gear being meshingly connected with the second gear set.

[0022] Preferably, the first gear set comprises a first driving gear and a first driven gear, the first driving gear being connected with the output shaft, the first driven gear being connected with the reduction differential mechanism, the first driving gear and the first driven gear being meshingly connected.

[0023] Preferably, the second gear set comprises a second driving gear and a second driven gear, the second driving gear is connected with the input shaft, and the second driven gear is connected with the first driving gear through the second clutch and the output shaft.

[0024] Preferably, the third gear set comprises a third driving gear and a third driven gear, the output end of the motor is connected with the third driving gear, the input shaft is connected with the third driven gear, and the third driving gear is in meshing connection with the third driven gear.

[0025] A four-wheel drive hybrid vehicle comprises a four-wheel drive hybrid vehicle system.

[0026] The utility model provides a kind of four-wheel drive hybrid vehicle system and four-wheel drive hybrid vehicle, its beneficial effect is at: the output end of the motor of the system is connected with the output end of engine by first transmission clutch mechanism, the output end of motor is connected with reduction differential mechanism by second transmission clutch mechanism, battery is electrically connected with motor and electric drive axle, when four-wheel drive hybrid vehicle low-speed travel, and only rely on pure electric drive, electric drive axle uses the electric energy stored in battery to drive four-wheel drive hybrid vehicle travel, first transmission clutch mechanism engages, second transmission clutch mechanism separates, motor and engine generate electricity together, and with battery together power drive axle drives four-wheel drive hybrid vehicle travel, such as four-wheel drive hybrid vehicle energy consumption is greater than power generation, battery is in discharge state, such as four-wheel drive hybrid vehicle energy consumption is less than power generation, battery is in charging state, at this time in long time pure electric drive, the electric quantity of battery is not easy to be exhausted, can be supplemented in time;When parallel hybrid travel, first transmission clutch mechanism engages, second transmission clutch mechanism engages, engine directly drives four-wheel drive hybrid vehicle, motor can generate electricity or electric drive according to four-wheel drive hybrid vehicle demand and control strategy, electric drive axle can generate electricity or electric drive according to four-wheel drive hybrid vehicle demand and control strategy, the system is through an engine, an motor connected with engine plus a pure electric drive axle constitutes a kind of flexible drive four-wheel drive hybrid vehicle system, compared with prior art due to the reduction of an motor, manufacturing cost is lower, lighter and smaller.

[0027] Other features and advantages of the utility model will be described in detail in the subsequent specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0028] The above and other objects, features and advantages of the utility model will become more apparent from the following detailed description of exemplary embodiments of the utility model, taken in conjunction with the accompanying drawings in which like reference characters commonly refer to similar or related parts throughout the drawings of which, in the utility model exemplary embodiments, the same reference numerals are generally used to refer to similar components.

[0029] Figure 1Fig. 2 shows a structural schematic diagram of a second clutch of a four-wheel hybrid electric vehicle system according to an embodiment of the present application when the second clutch is arranged between the second driven gear and the output shaft and the motor shaft is opposite to the input shaft; Figure 1 ;

[0030] Figure 2 Fig. 3 shows a structural schematic diagram of a second clutch of a four-wheel hybrid electric vehicle system according to an embodiment of the present application when the second clutch is arranged between the second driven gear and the output shaft and the motor is driven by the third gear set and the input shaft;

[0031] Figure 3 Fig. 4 shows a structural schematic diagram of a second clutch of a four-wheel hybrid electric vehicle system according to an embodiment of the present application when the second clutch is arranged between the second driven gear and the output shaft and the motor is driven by the transmission gear and the second driving gear;

[0032] Figure 4 Fig. 5 shows a structural schematic diagram of a second clutch of a four-wheel hybrid electric vehicle system according to an embodiment of the present application when the second clutch is arranged between the first driving gear and the output shaft;

[0033] Figure 5 Fig. 6 shows a structural schematic diagram of a second clutch of a four-wheel hybrid electric vehicle system according to an embodiment of the present application when the second clutch is a single friction clutch.

[0034] Legend of reference signs:

[0035] 1, wheel; 2, reduction differential mechanism; 3, electric drive axle; 4, motor; 5, engine; 6, battery; 7, input shaft; 8, first clutch; 9, output shaft; 10, first gear set; 11, second gear set; 12, second clutch; 13, third gear set; 14, transmission gear. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present application will be described in more detail below. Although the preferred embodiments of the present application are described below, 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. On the contrary, these embodiments are provided so that the present application is more complete and complete, and the scope of the present application is fully conveyed to those skilled in the art.

[0037] As shown in Figure 1 and Figure 4 The present application provides a four-wheel hybrid electric vehicle system for delivering power to two pairs of wheels of a vehicle, two wheels 1 of one pair of wheels 1 are connected by a reduction differential mechanism 2, and two wheels 1 of the other pair of wheels 1 are connected by an electric drive axle 3, the system comprises:

[0038] The motor 4 and the engine 5 are arranged at intervals;

[0039] The output end of the motor 4 is connected with the output end of the engine 5 through the first transmission clutch mechanism.

[0040] The output end of the motor 4 is connected with the reduction differential mechanism 2 through the second transmission clutch mechanism.

[0041] The battery 6 is electrically connected with the motor 4 and the electric drive axle 3.

[0042] Specifically, to solve the problems of the existing four-wheel drive hybrid vehicle system, to avoid power consumption during electric driving, two motors are arranged in the system, which will cause arrangement difficulty in some vehicle models, and the manufacturing cost is increased. The utility model provides a four-wheel drive hybrid vehicle system, the output end of the motor 4 of the system is connected with the output end of the engine 5 through the first transmission clutch mechanism, the output end of the motor 4 is connected with the reduction differential mechanism 2 through the second transmission clutch mechanism, and the battery 6 is electrically connected with the motor 4 and the electric drive axle 3. When the four-wheel drive hybrid vehicle drives at low speed and only relies on pure electric driving, the electric drive axle 3 drives the four-wheel drive hybrid vehicle to run by using the electric energy stored in the battery 6, the first transmission clutch mechanism is engaged, the second transmission clutch mechanism is separated, the motor 4 generates power together with the engine 5, and the battery 6 drives the electric drive axle 3 to drive the four-wheel drive hybrid vehicle to run. If the energy consumption of the four-wheel drive hybrid vehicle is greater than the power generation, the battery 6 is in the discharging state. If the energy consumption of the four-wheel drive hybrid vehicle is less than the power generation, the battery 6 is in the charging state. At this time, during long-time pure electric driving, the electric quantity of the battery 6 is not easy to be consumed and can be supplemented in time. When the parallel hybrid drives, the first transmission clutch mechanism is engaged, the second transmission clutch mechanism is engaged, the engine 5 directly drives the four-wheel drive hybrid vehicle, the motor 4 can generate power or electrically drive according to the demand of the four-wheel drive hybrid vehicle and the control strategy, and the electric drive axle 3 can generate power or electrically drive according to the demand of the four-wheel drive hybrid vehicle and the control strategy. The system comprises one engine 5, one motor 4 connected with the engine 5 and one pure electric drive axle 3, and constitutes a flexible driving four-wheel drive hybrid vehicle system. Compared with the prior art, since one motor 4 is reduced, the manufacturing cost is lower, the weight is lighter and the volume is smaller.

[0043] Preferably, the first transmission clutch mechanism comprises:

[0044] The input shaft 7;

[0045] The first clutch 8 is connected between the input shaft 7 and the output end of the engine 5.

[0046] Specifically, when the first clutch 8 is engaged, the power of the engine 5 is input to the input shaft 7 through the first clutch 8, and when the first clutch 8 is disengaged, the engine 5 is disconnected from the input shaft 7.

[0047] Preferably, the second transmission clutch mechanism comprises:

[0048] an output shaft 9;

[0049] a first gear set 10, the output shaft 9 and the reduction differential mechanism 2 are connected through the first gear set 10;

[0050] a second gear set 11, the second gear set 11 is connected with the input shaft 7;

[0051] a second clutch 12, the first gear set 10 and the second gear set 11 are connected through the second clutch 12 and the output shaft 9.

[0052] Specifically, when the second clutch 12 is engaged, the power of the engine 5 and / or the power of the motor 4 are sequentially input to the reduction differential mechanism 2 through the input shaft 7, the second gear set 11, the output shaft 9, and the first gear set 10, and when the second clutch 12 is disengaged, the second gear set 11 is disconnected from the first gear set 10.

[0053] As shown in Figure 5 , the first clutch 8 and the second clutch 12 are each selected according to the arrangement space requirement, the operation control requirement, etc., including but not limited to dry friction clutch, wet clutch, single-plate friction clutch, multi-plate friction clutch, synchronizer clutch device, meshing sleeve clutch device, and different combinations thereof, and the operation control mode can include hydraulic, pneumatic, and electric control mechanical.

[0054] As shown in Figure 1 , preferably, when the motor 4 is arranged opposite to the engine 5, the output end of the motor 4 is connected with the input shaft 7.

[0055] As shown in Figure 2 , preferably, when the motor 4 is arranged on the side of the input shaft 7, the first transmission clutch mechanism further comprises a third gear set 13, and the output end of the motor 4 is connected with the output shaft 9 through the third gear set 13.

[0056] As shown in Figure 3 , preferably, when the motor 4 is arranged on the side of the input shaft 7, the first transmission clutch mechanism further comprises a transmission gear 14, and the output end of the motor 4 is connected with the transmission gear 14, and the transmission gear 14 is meshingly connected with the second gear set 11.

[0057] Specifically, according to the vehicle space arrangement requirement, the motor 4 can be arranged opposite to the engine 5, arranged on the side of the input shaft 7 and connected through the third gear set 13, or meshingly connected with the second gear set through the transmission gear 14.

[0058] When the motor 4 is arranged opposite to the engine 5, the output end of the motor 4 is coaxial with the input shaft 7, when the motor 4 is arranged at the side of the input shaft, the transmission is realized through the third gear set 13 or the transmission gear 14.

[0059] Preferably, the first gear set 10 comprises a first driving gear and a first driven gear, the first driving gear is connected with the output shaft 9, the first driven gear is connected with the reduction differential mechanism 2, and the first driving gear and the first driven gear are in meshing connection.

[0060] Specifically, the reduction differential mechanism 2 comprises a reduction gear and a differential, and the first gear set can be a gear in the reduction gear.

[0061] Preferably, the second gear set 11 comprises a second driving gear and a second driven gear, the second driving gear is connected with the input shaft 7, and the second driven gear is connected with the first driving gear through the second clutch 12 and the output shaft 9.

[0062] Specifically, as shown in Figure 3 , the second clutch 12 is arranged between the second driven gear and the output shaft 9, or as shown in Figure 4 , the second clutch 12 is arranged between the first driving gear and the output shaft 9, or as shown in Figure 5 , the second clutch 12 is arranged on the output shaft 9.

[0063] Preferably, the third gear set 13 comprises a third driving gear and a third driven gear, the output end of the motor 4 is connected with the third driving gear, the input shaft 7 is connected with the third driven gear, and the third driving gear and the third driven gear are in meshing connection.

[0064] Preferably, the third driven gear can be one part with the second driving gear.

[0065] Preferably, the battery is electrically connected with the motor 4 and the electric drive axle 3 through a cable.

[0066] A four-wheel drive hybrid vehicle comprises a four-wheel drive hybrid vehicle system.

[0067] Preferably, the four-wheel drive hybrid vehicle further comprises two pairs of wheels 1, the two wheels 1 of one pair of wheels 1 are connected through the reduction differential mechanism 2, the two wheels 1 of the other pair of wheels 1 are connected through the electric drive axle 3, one pair of wheels 1 is the front wheel of the four-wheel drive hybrid vehicle, and the other pair of wheels 1 is the rear wheel of the four-wheel drive hybrid vehicle.

[0068] In summary, when the four-wheel drive hybrid vehicle system of the present application is applied to the four-wheel drive hybrid vehicle, the driving functions that can be achieved are as follows:

[0069] Pure electric motor two-wheel drive: the second clutch 12 is separated, the electric drive axle 3 uses the electric energy stored in the battery 6 to drive the four-wheel drive hybrid vehicle to run;

[0070] Pure electric motor two-wheel drive: the second clutch 12 is separated, the electric drive axle 3 uses the electric energy stored in the battery 6 to drive the four-wheel drive hybrid vehicle to run;

[0071] Pure electric motor two-wheel drive: the second clutch 12 is separated, the electric drive axle 3 uses the electric energy stored in the battery 6 to drive the four-wheel drive hybrid vehicle to run;

[0072] Engine and motor parallel two-wheel drive: the electric drive axle 3 does not work, the first clutch 8 is engaged, the second clutch 12 is engaged, the motor 4 uses the electric energy stored in the battery 6 to drive the four-wheel drive hybrid vehicle to run in parallel with the engine 5; Engine and motor parallel four-wheel drive: the electric drive axle 3 uses the electric energy stored in the battery 6 to drive the four-wheel drive hybrid vehicle to run, the first clutch 8 is engaged, the second clutch 12 is engaged, the motor 4 uses the electric energy stored in the battery 6 to drive the four-wheel drive hybrid vehicle to run in parallel with the engine 5;

[0073] Engine and motor parallel two-wheel drive: the electric drive axle 3 does not work, the first clutch 8 is engaged, the second clutch 12 is engaged, the motor 4 uses the electric energy stored in the battery 6 to drive the four-wheel drive hybrid vehicle to run in parallel with the engine 5; Engine and motor parallel four-wheel drive: the electric drive axle 3 uses the electric energy stored in the battery 6 to drive the four-wheel drive hybrid vehicle to run, the first clutch 8 is engaged, the second clutch 12 is engaged, the motor 4 uses the electric energy stored in the battery 6 to drive the four-wheel drive hybrid vehicle to run in parallel with the engine 5;

[0074] Engine and motor parallel two-wheel drive: the electric drive axle 3 does not work, the first clutch 8 is engaged, the second clutch 12 is engaged, the motor 4 uses the electric energy stored in the battery 6 to drive the four-wheel drive hybrid vehicle to run in parallel with the engine 5; Engine and motor parallel four-wheel drive: the electric drive axle 3 uses the electric energy stored in the battery 6 to drive the four-wheel drive hybrid vehicle to run, the first clutch 8 is engaged, the second clutch 12 is engaged, the motor 4 uses the electric energy stored in the battery 6 to drive the four-wheel drive hybrid vehicle to run in parallel with the engine 5;

[0075] The four-wheel drive hybrid vehicle system integrates various driving functions, and different driving functions can be selected as required, when the four-wheel drive hybrid vehicle is low-speed running and only relies on pure electric driving, the electric drive axle 3 uses the electric energy stored in the battery 6 to drive the four-wheel drive hybrid vehicle to run, the first clutch 8 is engaged, the second clutch 12 is separated, the motor 4 generates electricity together with the engine 5, and together with the battery 6, the electric drive axle 3 drives the four-wheel drive hybrid vehicle to run, if the energy consumption of the four-wheel drive hybrid vehicle is greater than the power generation, the battery 6 is in a discharging state, if the energy consumption of the four-wheel drive hybrid vehicle is less than the power generation, the battery 6 is in a charging state, at this time, when the pure electric driving is long, the battery 6 is not easy to be exhausted, and can be supplemented in time, the system comprises an engine 5, a motor 4 connected with the engine 5 and a pure electric drive axle 3, and constitutes a flexible driving four-wheel drive hybrid vehicle system, compared with the prior art, since one motor 4 is reduced, the manufacturing cost is lower, the weight is lighter and the volume is smaller.

[0076] A generator involves motor stator and rotor, motor driver, motor heat dissipation and electromagnetic system design, and the current device cost is more than 3000 yuan, and the motor volume and weight are large, so that the system axial length is difficult to control, and many vehicle models are difficult to arrange. The vehicle no longer needs the motor through the clutch cooperation of the present application, and the cost of a pair of clutches is only dozens to hundreds of yuan, the axial size can be controlled within dozens of millimeters, and the weight is only a few kilograms. Therefore, the cost of the present application is lower, the weight is lighter and the volume is smaller.

[0077] The above has described various embodiments of the present application, 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 four-wheel drive hybrid vehicle system for delivering power to two pairs of wheels of a vehicle, two wheels of one pair of wheels being connected through a reduction differential mechanism, and two wheels of the other pair of wheels being connected through an electric drive axle, characterized in that, The system comprises: a motor and an engine; a first transmission clutch mechanism, an output end of the motor and an output end of the engine are connected through the first transmission clutch mechanism; a second transmission clutch mechanism, the output end of the motor and the reduction differential mechanism are connected through the second transmission clutch mechanism; a battery, the battery is electrically connected with the motor and the electric drive axle.

2. The four-wheel drive hybrid vehicle system according to claim 1, characterized by, The first transmission clutch mechanism comprises: an input shaft; a first clutch, the input shaft and the output end of the engine are connected through the first clutch.

3. The four-wheel drive hybrid vehicle system according to claim 2, wherein The second transmission clutch mechanism comprises: an output shaft; a first gear set, the output shaft and the reduction differential mechanism are connected through the first gear set; a second gear set, the second gear set is connected with the input shaft; a second clutch, the first gear set and the second gear set are connected through the second clutch and the output shaft.

4. The four-wheel drive hybrid vehicle system according to claim 3, wherein When the motor is arranged opposite to the engine, the output end of the motor is connected with the input shaft.

5. The four-wheel drive hybrid vehicle system according to claim 3, wherein When the motor is arranged on the side of the input shaft, the first transmission clutch mechanism further comprises a third gear set, the output end of the motor is connected with the output shaft through the third gear set.

6. The four-wheel drive hybrid vehicle system of claim 3, wherein, When the motor is arranged on the side of the input shaft, the first transmission clutch mechanism further comprises a transmission gear, the output end of the motor is connected with the transmission gear, and the transmission gear is meshed with the second gear set.

7. The four-wheel drive hybrid vehicle system of claim 3, wherein, The first gear set comprises a first driving gear and a first driven gear, the first driving gear is connected with the output shaft, the first driven gear is connected with the reduction differential mechanism, and the first driving gear and the first driven gear are meshed.

8. The four-wheel drive hybrid vehicle system of claim 7, wherein, The second gear set comprises a second driving gear and a second driven gear, the second driving gear is connected with the input shaft, and the second driven gear is connected with the first driving gear through the second clutch and the output shaft.

9. The four-wheel drive hybrid vehicle system of claim 5, wherein, The third gear set comprises a third driving gear and a third driven gear, the output end of the motor is connected with the third driving gear, the input shaft is connected with the third driven gear, and the third driving gear and the third driven gear are meshed.

10. A four-wheel drive hybrid vehicle characterized by comprising: A four-wheel drive hybrid vehicle system comprising any one of claims 1-9.

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