CN111114284B - Power split hybrid coupling system and vehicle - Google Patents

Abstract

The invention belongs to the field of new energy automobiles, and relates to a power split hybrid power coupling system and a vehicle, wherein the power split hybrid power coupling system comprises an engine, a generator, a driving motor, a second clutch, a third clutch, a gear shifter, a planet row, a first input shaft, an intermediate shaft, a first reduction gear pair and a second reduction gear pair, wherein the speed ratios of the first reduction gear pair and the second reduction gear pair are different; the engine is connected with a first input shaft, the first input shaft is connected with a middle shaft through a gear shifter and a second reduction gear pair, an output shaft of the generator is rotatably sleeved on the first input shaft, a sun gear of the planet row is arranged on the output shaft of the generator, the planet carrier is connected with the first input shaft, and the inner gear ring is connected with the generator through a second clutch; the inner gear ring is also connected with the intermediate shaft through a third clutch and a first reduction gear pair; the driving motor is connected with the intermediate shaft, and the intermediate shaft outputs power to the wheels; the system load is reduced, multiple driving modes can be realized, the speed ratio is adjustable, the transmission efficiency is higher, and the power performance and the economy of the whole vehicle are improved.

Description

Power split hybrid coupling system and vehicle

Technical field

The invention belongs to the field of new energy vehicles, and in particular relates to a power split hybrid coupling system and a vehicle.

Background technique

The power system includes an engine (internal combustion engine) and a transmission system consisting of a transmission, a differential and a drive shaft; its function is to provide the vehicle with the driving power required to drive the wheels. The internal combustion engine has a certain speed and torque range, and reaches the best working condition within a small range. At this time, either the fuel consumption is the smallest, the harmful emissions are the lowest, or both. However, actual road conditions vary greatly, not only in the speed of the driving wheels, but also in the torque required by the driving wheels. Therefore, it is the primary task of the transmission to achieve the optimal speed and torque of the internal combustion engine, that is, the optimal power state, and to match the power state of the drive wheels.

In recent years, the birth of motor hybrid technology has opened up new ways to achieve a complete match of power between the internal combustion engine and the power wheels. Among the many powertrain designs, the most representative ones are series hybrid systems and parallel hybrid systems. In the motor series hybrid system, the internal combustion engine, the generator, the electric motor, the shaft system and the drive wheel form a series power chain, and the powertrain structure is extremely simple. Among them, the generator-motor combination can be regarded as a transmission in the traditional sense. When used in conjunction with energy storage devices, such as batteries, capacitors, etc., the transmission can also be used as an energy regulation device to complete independent regulation of speed and torque.

The motor parallel system has two parallel independent power chains. One consists of a traditional mechanical transmission, and the other consists of a motor-battery system. The mechanical transmission is responsible for adjusting the speed, while the motor-battery system adjusts the power or torque. In order to fully utilize the potential of the entire system, the mechanical transmission also needs to adopt continuously variable speed.

The advantages of the series hybrid system are simple structure and flexible layout. However, since all the power passes through the generator and the motor, the motor has high power requirements, is large in size, and is heavy in weight. At the same time, since the energy transmission process goes through two conversions of mechanical to electrical and electrical to electrical, the efficiency of the entire system is low. In a parallel hybrid system, only part of the power passes through the motor system, so the power requirements for the motor are relatively low. The overall system efficiency is high. However, this system requires two independent subsystems and is expensive. Typically used only in weakly mixed systems.

An existing power coupling system includes an engine, a generator, a clutch, and a drive motor. The generator is coaxially connected to the engine. The clutch is arranged between the engine and the generator. The drive motor is connected to the clutch and differential through a transmission device. Speed connected. There is only one gear when the motor is driven, and the dual-motor pure electric mode cannot be realized, which will result in limited power and room for further improvement in economy. This system is only suitable for urban working conditions and small and medium-sized vehicles. For non-urban working conditions and larger vehicles, the power and economy are not very ideal.

Contents of the invention

The technical problem to be solved by the present invention is to provide a power split hybrid coupling system and vehicle in view of the insufficient power and economy of the existing power coupling system.

In order to solve the above technical problems, embodiments of the present invention provide a power split hybrid coupling system, including an engine, a generator, a drive motor, a second clutch, a third clutch, a shifter, a planetary gearbox, a first input shaft, an intermediate shaft, a first reduction gear pair and a second reduction gear pair with a speed ratio different from that of the first reduction gear pair;

The output shaft of the engine is connected to the first input shaft;

The first input shaft is connected to the intermediate shaft through the shifter and the second reduction gear pair, and the shifter is used to connect or disconnect the second reduction gear pair to the first input shaft. The effective connection between the shaft and the intermediate shaft;

The output shaft of the generator is rotatably sleeved on the first input shaft;

The planet row includes a sun gear, a planet carrier and an internal ring gear; the sun gear is located on the output shaft of the generator, the planet carrier is connected to the first input shaft, and the internal ring gear passes through the The second clutch is connected to the output shaft of the generator, and the internal ring gear is also connected to the intermediate shaft through reduction of the third clutch and the first reduction gear pair;

The drive motor is connected to the intermediate shaft;

The countershaft outputs power to the wheels.

An embodiment of the present invention provides a vehicle, including a controller and a battery connected to the controller; further including the aforementioned power split hybrid coupling system, the engine, the generator and the drive motor are connected to the controller and controlled by said controller.

In the power split hybrid coupling system and vehicle provided by the embodiment of the present invention, when the second clutch is coupled, the planetary row rotates as a whole, and when the third clutch is coupled, the torque of the inner ring gear is transmitted to the first reduction gear pair; the first reduction gear pair, and the third reduction gear pair The second reduction gear pair plays the role of decelerating and increasing flow. The first reduction gear pair and the second reduction gear pair realize two-speed deceleration of the engine or generator. Both the engine and the generator have two gears when driving, which significantly improves the efficiency of the engine or generator. It improves the power performance of the entire vehicle; by switching the working state of the third clutch and the working state of the shifter, the engine or generator can be controlled to drive the wheels in any one of the two gears, and the drive motor can drive the wheels. Achieve multiple driving modes, obtain higher transmission efficiency, and improve vehicle economy; the engine and generator share a two-speed reduction assembly, which has a simple and compact structure, reducing the number of parts, which is beneficial to reducing the system load and reducing the The size reduces the cost of the two-speed reduction assembly;

The engine and generator are connected through a planetary gearbox, the speed ratio is adjustable, and the speed ratio range is large, which can reduce the size of the generator, thereby improving the power performance of the vehicle and reducing the cost of the generator; due to the realization of dual-motor pure electric mode, it can meet the power requirements even if the drive motor is appropriately reduced, thereby further improving the power performance of the vehicle and reducing the cost of the generator drive motor;

In the hybrid mode, the planetary transmission speed can be adjusted to optimize the engine's working range and improve the engine's economic performance; in the dual-motor pure electric mode and hybrid drive mode, the drive motors participate in the drive to avoid power interruption.

Description of drawings

Figure 1 is a schematic structural diagram 1 of a power split hybrid coupling system provided by an embodiment of the present invention;

Figure 2 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 1 in single-motor pure electric mode;

Figure 3 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 1 in the first dual-motor pure electric mode;

Figure 4 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 1 in the second dual-motor pure electric mode;

Figure 5 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 1 in the third dual-motor pure electric mode;

Figure 6 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 1 in the first hybrid drive mode;

Figure 7 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 1 in the second hybrid drive mode;

Figure 8 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 1 in the third hybrid drive mode;

Figure 9 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 1 in the fourth hybrid drive mode;

Figure 10 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 1 in the first engine direct drive mode;

Figure 11 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 1 in the second engine direct drive mode;

Figure 12 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 1 in the third engine direct drive mode;

Figure 13 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 1 in the extended range mode;

Figure 14 is a schematic diagram 2 of the structure of the power split hybrid coupling system provided by the embodiment of the present invention;

Figure 15 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 14 in single motor pure electric mode;

Figure 16 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 14 in the first dual-motor pure electric mode;

Figure 17 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 14 in the second dual-motor pure electric mode;

Figure 18 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 14 in the third dual-motor pure electric mode;

Figure 19 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 14 in the first hybrid drive mode;

Figure 20 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 14 in the second hybrid drive mode;

Figure 21 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 14 in the third hybrid drive mode;

Figure 22 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 14 in the fourth hybrid drive mode;

Figure 23 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 14 in the first engine direct drive mode;

Figure 24 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 14 in the second engine direct drive mode;

Figure 25 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 14 in the third engine direct drive mode;

Figure 26 is a power transmission roadmap of the power split hybrid coupling system shown in Figure 14 in the extended range mode;

The reference symbols in this manual are as follows:

1. Engine; 2. Generator; 3. Drive motor;

4. First clutch; 5. Second clutch; 6. Third clutch; 7. Fourth clutch; 8. Fifth clutch; 9. Clutch housing; 10. Synchronizer;

11. Planet row; 111. Sun gear; 112. Planet carrier; 113. Internal ring gear;

12. The first input shaft; 13. The second input shaft;

14. Intermediate shaft;

15. First reduction gear pair; 151. First gear; 152. Second gear;

16. Second reduction gear pair; 161. Third gear; 162. Fourth gear;

17. The third reduction gear pair; 171. The fifth gear; 172. The sixth gear;

18. The fourth reduction gear pair; 181. The seventh gear;

19. The fifth reduction gear pair; 191. The eighth gear;

20. Differential; 21. Wheels.

Detailed ways

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

As shown in Figures 1 and 14, the power split hybrid coupling system provided by the embodiment of the present invention includes an engine 1, a generator 2, a drive motor 3, a second clutch 5, a third clutch 6, a shifter, and a planetary gearbox. 11. The first input shaft 12, the intermediate shaft 14, the first reduction gear pair 15 and the second reduction gear pair 16 with a speed ratio different from that of the first reduction gear pair 15;

The output shaft of the engine 1 is connected to the first input shaft 12;

The first input shaft 12 is connected to the intermediate shaft 14 through a shifter and a second reduction gear pair 16. The shifter is used to combine or disconnect the second reduction gear pair 16 from effectively connecting the first input shaft 12 and the intermediate shaft 14 ( In this application, "effective connection" refers to a connection that can realize power transmission);

The output shaft of the generator 2 is rotatably sleeved on the first input shaft 12;

The planet row 11 includes a sun gear 111, a planet carrier 112 and an internal ring gear 113; the sun gear 111 is located on the output shaft of the generator 2, the planet carrier 112 is connected to the first input shaft 12, and the internal ring gear 113 passes through the second clutch 5 Connected to the output shaft of the generator 2, the internal ring gear 113 is also decelerated and connected to the intermediate shaft 14 through the third clutch 6 and the first reduction gear pair 15;

The drive motor 3 is connected to the intermediate shaft 14;

The intermediate shaft 14 outputs power to the wheels 21 .

When in use, by combining the second clutch 5 and the third clutch 6, or combining the third clutch 6, or combining the shifter, the power of the engine 1 can be transmitted to the first input shaft 12, and the power of the first input shaft 12 then passes through the planetary system. Row 11, the third clutch 6 and the first reduction gear pair 15 are transmitted to the intermediate shaft 14, or are transmitted to the intermediate shaft 14 through the shifter and the second reduction gear pair 16. The intermediate shaft 14 outputs power to the wheels 21, thereby realizing Engine 1 directly drives wheels 21;

Combined with the second clutch 5 and the third clutch 6 or the shifter, the power of the generator 2 can be transmitted to the planetary row 11, and then the power of the planetary row 11 passes through the third clutch 6 and the first reduction gear pair 15, or again It is transmitted to the intermediate shaft 14 through the first input shaft 12, the shifter and the second reduction gear pair 16, and the intermediate shaft 14 outputs power to the wheels 21, thereby realizing the generator 2 driving the wheels 21;

The power of the drive motor 3 can be output to the wheels 21 through the intermediate shaft 14, so that the drive motor 3 can directly drive the wheels 21;

The power of the engine 1 can be transmitted to the first input shaft 12, and the power of the first input shaft 12 can be transmitted to the generator 2 through the planetary row 11, thereby driving the generator 2 to generate electricity;

When the engine 1 or generator 2 and the drive motor 3 jointly participate in driving, the intermediate shaft 14 plays the role of coupling power and transmits the coupled power to the wheels 21;

When the engine 1 and the generator 2 jointly participate in driving, the planetary row 11 (when the power is output through the first reduction gear pair 15) or the first input shaft 12 (when the power is output through the second reduction gear pair 16) serves as a coupling power. function and transmit the coupled power to the wheels 21.

In the power split hybrid coupling system provided by the embodiment of the present invention, when the second clutch 5 is engaged, the planetary row 11 rotates as a whole, and when the third clutch 6 is engaged, the torque of the inner ring gear 113 is transmitted to the first reduction gear pair 15; the first reduction gear The pair 15 and the second reduction gear pair 16 play the role of deceleration and flow increase. Through the first reduction gear pair 15 and the second reduction gear pair 16, the two-speed deceleration of the engine 1 or the generator 2 is realized. The engine 1 and the generator 2 drive It has two gears at all times, which significantly improves the power performance of the entire vehicle; by switching the working state of the third clutch 6 (combined or disconnected) and the working state of the shifter (combined or disconnected), the engine can be controlled 1 or generator 2 uses any one of the two gears to drive the wheels 21, and the drive motor 3 can drive the wheels 21, which can realize multiple driving modes, obtain higher transmission efficiency, and improve vehicle economy; engine 1 and The generator 2 shares two-speed reduction components (the first reduction gear pair 15 and the second reduction gear pair 16). The structure is simple and compact, reducing the number of parts, which is beneficial to reducing the system load, reducing the volume, and reducing the cost. The cost of the two-speed reduction assembly;

The engine 1 and the generator 2 are connected through the planetary gearbox 11, the speed ratio is adjustable, and the speed ratio range is large, which can reduce the size of the generator 2, thereby improving the power performance of the entire vehicle and reducing the cost of the generator 2; due to the The dual-motor pure electric mode can meet the power requirements even if the drive motor 3 is appropriately reduced, thereby further improving the power performance of the vehicle and reducing the cost of the generator 2 driving the motor 3;

In the hybrid mode, the speed of the planetary gearbox 11 can be adjusted to optimize the working range of the engine 1 and improve the economic performance of the engine 1; in the dual-motor pure electric mode and hybrid drive mode, the drive motor 3 participates in driving to avoid power interruption.

Due to the realization of the engine direct drive mode, the energy conversion of electromechanical and electromechanical is avoided, and the transmission efficiency is improved;

Among them, generator 2 is a motor/generator (M/G), which can be used for power generation and driving.

Specifically, the generator 2 is also used as a starter motor to start the engine 1 . If generator 2 is not driving or generating electricity, and engine 1 is driving, generator 2 starts engine 1 and then stops working; if generator 2 is driving or generating electricity, and engine 1 is driving, generator 2 starts engine 1 and keeps working. .

Specifically, the shifter can be the fourth clutch 7 or the synchronizer 10 , both of which can combine or disconnect the second reduction gear pair 16 to effectively connect the first input shaft 12 and the intermediate shaft 14 , so that the first input shaft 12 and the intermediate shaft 14 can be effectively connected. The power of the input shaft 12 is transmitted to the intermediate shaft 14 through the second reduction gear pair 16 , or the power of the first input shaft 12 is prevented from being transmitted to the intermediate shaft 14 through the second reduction gear pair 16 .

In one embodiment, as shown in FIGS. 1 and 14 , a first clutch 4 is also included. The output shaft of the engine 1 is connected to the first input shaft 12 through the first clutch 4 . By controlling the on and off of the first clutch 4, the control of whether the engine 1 participates in driving is realized; when the engine 1 is required to drive the wheels 21 or drive the generator 2 to generate electricity, just combine the first clutch 4. When the engine 1 is not required to work, The first clutch 4 is disconnected to reduce the system load and protect the engine 1 .

In one embodiment, as shown in Figures 1 and 14, regardless of whether the first clutch 4 is provided, the power split hybrid coupling system can be provided with a third reduction gear pair 17, and the first input shaft 12 can also selectively pass through The third reduction gear pair 17 is connected to the intermediate shaft 14, which can increase a gear when the engine 1 or the generator 2 is driven.

Specifically, as shown in FIG. 14 , the shifter may be a fourth clutch 7 , and the first input shaft 12 is also connected to the intermediate shaft 14 through a fifth clutch 8 and a third reduction gear pair 17 . By controlling the working state (combined or disconnected) of the fourth clutch 7 and the fifth clutch 8, one of the second reduction gear pair 16 and the third reduction gear pair 17 can be selectively connected to the first input shaft 12 and the intermediate between the shafts 14, thereby adding a gear. Both the engine 1 and the generator 2 can achieve three-speed transmission. Of course, there is no need for the engine 1 and the generator 2 to output power through the second reduction gear pair 16 or the third reduction gear pair 17. When , just disconnect the fourth clutch 7 and the fifth clutch 8 , which is easy to use and has a simple structure, which is beneficial to reducing the system load;

As shown in FIG. 1 , the shifter may be a synchronizer 10 , and the first input shaft 12 is also connected to the intermediate shaft 14 through the synchronizer 10 and the third reduction gear pair 17 for reduction. By controlling the working state of the synchronizer 10 (combined with the second reduction gear pair 16 or the third reduction gear pair 17), one of the second reduction gear pair 16 and the third reduction gear pair 17 can be selectively connected to the first input between the shaft 12 and the intermediate shaft 14, thereby adding a gear. Both the engine 1 and the generator 2 can achieve three-speed transmission. Of course, there is no need for the engine 1 and the generator 2 to pass through the second reduction gear pair 16 or the third reduction gear. When the pair 17 outputs power, the synchronizer 10 simultaneously disconnects the second reduction gear pair 16 or the third reduction gear pair 17 from the effective connection to the first input shaft 12 and the intermediate shaft 14. It is easy to use, has a simple structure, and is conducive to reducing power consumption. Small system load.

Of course, not shown in the figure, when the shifter is the fourth clutch 7, the first input shaft 12 can also be connected to the intermediate shaft 14 through the synchronizer and the third reduction gear pair 17; when the shifter is the synchronizer 10, the first input shaft 12 An input shaft 12 can also be connected to the intermediate shaft 14 through a fifth clutch and a third reduction gear pair 17 . It is possible to selectively connect one of the second reduction gear pair 16 and the third reduction gear pair 17 between the first input shaft 12 and the intermediate shaft 14, or to simultaneously disconnect the second reduction gear pair 16 and the third reduction gear pair 16. The reduction gear pair 17 effectively connects the first input shaft 12 and the intermediate shaft 14 .

In one embodiment, as shown in Figure 14, when the shifter is the fourth clutch 7, the power split hybrid coupling system also includes a second input shaft 13; the fourth clutch 7 and the fifth clutch 8 are integrated to share the same clutch. In the double clutch of the housing 9, the first input shaft 12 is connected to the clutch housing 9, the second input shaft 13 is connected to the fifth clutch 8, and the third reduction gear pair 17 reduces the speed and connects the second input shaft 13 and the intermediate shaft 14. The two reduction gear pairs 16 are rotatably arranged on the second input shaft 13 and connected with the fourth clutch 7 .

The structure and assembly are simplified, which is beneficial to reducing costs and system load. The power of the engine 1 and the generator 2 is first transmitted to the first input shaft 12, and the power on the first input shaft 12 passes through the clutch housing of the dual clutch. 9 branch. If the fourth clutch 7 is engaged, the power is transmitted to the intermediate shaft 14 through the second reduction gear pair 16. If the fifth clutch 8 is engaged, the power is transmitted to the intermediate shaft 14 through the third reduction gear pair 17. If the fourth clutch 7 If the clutch 8 and the fifth clutch 8 are both disconnected, the power will not be transmitted through the second reduction gear pair 16 or the third reduction gear pair 17 .

Of course, not shown in the figure, the fourth clutch and the fifth clutch can also be two independent single clutches provided on the first input shaft 12, or other methods that can selectively connect the second reduction gear pair 16 and the third clutch. One of the three reduction gear pairs 17 is effectively connected between the first input shaft 12 and the intermediate shaft 14 , or the second reduction gear pair 16 and the third reduction gear pair 17 are simultaneously disconnected from the first input shaft 12 and the intermediate shaft 14 effective connection structure.

In one embodiment, as shown in FIGS. 1 and 14 , the first reduction gear pair 15 includes a first gear 151 and a second gear 152 that mesh with each other; the first gear 151 is rotatably provided on the first input shaft 12 , the second gear 152 is fixed on the intermediate shaft 14 , and the internal ring gear 113 is connected to the first gear 151 through the third clutch 6 . The structure is simpler and more compact, which helps reduce the system load and increases the stability of the transmission.

In one embodiment, as shown in Figure 1, the second reduction gear pair 16 includes a third gear 161 and a fourth gear 162 that mesh with each other; wherein:

The third gear 161 is rotatably provided on the first input shaft 12, the shifter is provided on the first input shaft 12 and is used to combine with the third gear 161, and the fourth gear 162 is fixedly provided on the intermediate shaft 14; or,

The third gear 161 is fixedly mounted on the first input shaft 12 , the fourth gear 162 is rotatably mounted on the intermediate shaft 14 , and the shifter is mounted on the intermediate shaft 14 and used to couple with the fourth gear 162 .

The structure is simpler and more compact, which helps reduce the system load and increases the stability of the transmission.

In one embodiment, the third reduction gear pair 17 includes a fifth gear 171 and a sixth gear 172 that mesh with each other;

When the fifth clutch 8 is provided: the fifth gear 171 is rotatably mounted on the first input shaft 12 , the fifth clutch 8 is connected between the fifth gear 171 and the first input shaft 12 , and the sixth gear 172 is fixedly mounted on the first input shaft 12 . on the intermediate shaft 14 (as shown in Figure 14); alternatively, the fifth gear 171 is fixedly provided on the first input shaft 12, the sixth gear 172 is rotatably provided on the intermediate shaft 14, and the fifth clutch 8 is connected to the sixth Between the gear 172 and the intermediate shaft 14 (not shown).

When the shifter is a synchronizer 10 and is provided on the first input shaft 12: the fifth gear 171 is rotatably provided on the first input shaft 12, and the synchronizer 10 is also used to combine the fifth gear 171 and the sixth gear 172 Fixed on the intermediate shaft 14 (as shown in Figure 1);

When the shifter is a synchronizer 10 and is provided on the intermediate shaft 14: the fifth gear 171 is fixedly provided on the first input shaft 12, and the sixth gear 172 is rotatably provided on the intermediate shaft 14. The synchronizer 10 is also used for Combined with the sixth gear 172 (not shown).

The structure is simpler and more compact, which helps reduce the system load and increases the stability of the transmission.

Preferably, as shown in FIG. 1 , when the shifter is a synchronizer 10 , the third gear 161 and the fifth gear 171 are sleeved on the first input shaft 12 .

Preferably, as shown in FIG. 14 , when the second input shaft 13 is provided, the third gear 161 is rotatably sleeved on the second input shaft 13 (the third gear 161 is rotatably provided indirectly through the fourth clutch 7 on the first input shaft 12), the fourth gear 162 is fixed on the intermediate shaft 14, and the fifth gear 171 is fixed on the second input shaft 13 (the fifth gear 171 passes through the second input shaft 13 and the fifth clutch 8 (indirectly and rotatably provided on the first input shaft 12 ), and the sixth gear 172 is fixedly provided on the intermediate shaft 14 .

In one embodiment, as shown in Figures 1 and 14, it also includes a fourth reduction gear pair 18. The drive motor 3 is connected to the intermediate shaft 14 through the fourth reduction gear pair 18; the fourth reduction gear pair 18 plays the role of deceleration and acceleration. The role of flow.

In one embodiment, as shown in FIGS. 1 and 14 , the fourth reduction gear pair 18 includes a seventh gear 181 provided on the output shaft of the drive motor 3 and a seventh gear 181 provided on the intermediate shaft 14 and meshed with the seventh gear 181 . Fourth driven gear.

The structure is simpler and more compact, which helps reduce the system load and increases the stability of the transmission.

Wherein, the fourth driven gear can be a gear independent of the third reduction gear pair 17, the second reduction gear pair 16 and the first reduction gear pair 15; preferably the fourth driven gear is the sixth gear 172 (as shown in Figures 1 and 1 14 ), any one of the fourth gear 162 and the second gear 152 that is fixedly connected to the intermediate shaft 14 , the fourth reduction gear pair 18 and the third reduction gear pair 17 , the second reduction gear pair 16 or the first The reduction gear pair 15 shares one gear (the sixth gear 172, the fourth gear 162 or the second gear 152), which on the one hand is conducive to simplifying the structure and reducing the system load, and on the other hand is conducive to coupling the drive motor 3 with the engine 1 or power generation. The power transmitted from machine 2.

In addition, as shown in FIGS. 1 and 14 , the power split hybrid coupling system also includes a differential 20 , the intermediate shaft 14 is connected to the differential 20 , and the differential 20 drives the wheels 21 .

Preferably, as shown in FIGS. 1 and 14 , the power split hybrid coupling system also includes a fifth reduction gear pair 19 , and the intermediate shaft 14 is connected to the differential 20 through the fifth reduction gear pair 19 . The power provided by the engine 1 and the generator 2 undergoes two-stage reduction (the first reduction gear pair 15 and the fifth reduction gear pair 19, or the second reduction gear pair 16 and the fifth reduction gear pair 19, or the third reduction gear pair 17 and the fifth reduction gear pair 19) before transmitting power to the differential 20. The power provided by the drive motor 3 undergoes two-stage reduction (the fourth reduction gear pair 18 and the fifth reduction gear) before transmitting power to the differential 20. , to achieve better power matching.

More preferably, as shown in Figures 1 and 14, the fifth reduction gear pair 19 includes an eighth gear 191 and a fifth driven gear provided on the intermediate shaft 14 and meshing with the eighth gear 191;

The fifth driven gear may be a gear independent of the third reduction gear pair 17 , the second reduction gear pair 16 and the first reduction gear pair 15 ; preferably the fifth driven gear is the sixth gear 172 or the fourth gear 162 and any one of the second gears 152 (shown in Figures 1 and 14) that is fixedly connected to the intermediate shaft 14, and the fifth driven gear and the fourth driven gear are independent of each other, and the fifth reduction gear pair 19 and the The third reduction gear pair 17, the second reduction gear pair 16 or the first reduction gear pair 15 share one gear (the sixth gear 172, the fourth gear 162 or the second gear 152), which is beneficial to simplifying the structure and reducing the system load.

The following describes preferred working mode embodiments involving clutch and shifter control:

Embodiment 1

When the second clutch 5, the third clutch 6 and the shifter are provided, the power split hybrid coupling system has a single-motor pure electric mode and a dual-motor pure electric drive mode (having two gears: the second dual-motor pure electric mode and the third Three dual-motor pure electric mode), hybrid drive mode (with E-CVT mode - first hybrid drive mode, and two gears: third hybrid drive mode and fourth hybrid drive mode), engine direct drive mode (with two gears: Five working modes including second engine direct drive mode and third engine direct drive mode) and extended range mode;

Among them, the aforementioned five working modes are reflected in Table 1. C1, C2, C3 and S in Table 1 respectively represent the first clutch 4, the second clutch 5, the third clutch 6 and the shifter.

Table 1

(1) Single motor pure electric mode

The second clutch 5 is disconnected, the third clutch 6 is disconnected, and the shifter is disconnected. The engine 1 and the generator 2 do not work, and the drive motor 3 is driven to establish a single-motor pure electric mode.

(2) Second dual-motor pure electric drive mode

The second clutch 5 is combined, the third clutch 6 is disconnected, and the shifter is combined. The engine 1 does not work, and the generator 2 and the drive motor 3 are driven together to establish the second dual-motor pure electric mode.

(3) The third dual-motor pure electric drive mode

Combined with the second clutch 5 and the third clutch 6, the shifter is disconnected, the engine 1 does not work, and the generator 2 and the drive motor 3 are driven together to establish the third dual-motor pure electric mode.

(4) First hybrid drive mode

The second clutch 5 is disconnected, the third clutch 6 is combined, the shifter is disconnected, the engine 1 drives, the generator 2 generates electricity under the drive of the engine 1, and the drive motor 3 assists in driving to establish the first hybrid driving mode.

(5)Third hybrid drive mode

The second clutch 5 is combined, the third clutch 6 is disconnected, and the shifter is combined, the engine 1 drives, the generator 2 generates electricity under the drive of the engine 1, and the drive motor 3 assists in driving to establish the third hybrid driving mode.

(6) The fourth hybrid drive mode

The second clutch 5 is combined with the third clutch 6 to disconnect the shifter, the engine 1 drives, the generator 2 generates electricity under the drive of the engine 1, and the drive motor 3 drives to establish the fourth hybrid drive mode.

(7) Second engine direct drive mode

The second clutch 5 is disconnected, the third clutch 6 is disconnected, combined with the shifter, the engine 1 drives, the generator 2 and the drive motor 3 do not work, so as to establish the second engine direct drive mode.

(8) Third engine direct drive mode

The second clutch 5 is combined with the third clutch 6, the shifter is disconnected, the engine 1 drives, the generator 2 and the drive motor 3 do not work, so as to establish the third engine direct drive mode.

(9) Extended range mode

Combined with the second clutch 5, the third clutch 6 is disconnected, and the shifter is disconnected. The engine 1 drives the generator 2 to generate electricity, and the drive motor 3 drives to establish the extended range mode.

(10) Parking power generation mode

The second clutch 5 is disconnected, the third clutch 6 is disconnected, and the shifter is disconnected. The engine 1 and the generator 2 do not work. The drive motor 3 generates braking torque and generates an induced current in its winding to charge the power battery. To establish parking power generation mode;

In the first embodiment, the power transmission route and usage conditions of the power split hybrid coupling system in each driving mode are the same as the power transmission route and usage conditions of the power split hybrid coupling system in the corresponding driving mode in the second embodiment, where No need to go into details.

In addition, when the first clutch 4 is provided, as shown in Table 1, when only the engine 1 is required to participate in driving or generating electricity, the first clutch 4 can be combined, and when the engine 1 is not required to operate, the first clutch 4 can be disconnected.

For the structure of the first embodiment, reference can be made to FIG. 1 for the structure after the third reduction gear pair 17 is cancelled, and in FIG. 14 for the structure after the fifth clutch 8 and the third reduction gear pair 17 are cancelled.

Embodiment 2

When the second clutch 5, the third clutch 6 and the synchronizer 10 are provided, the power split hybrid coupling system has a single-motor pure electric mode and a dual-motor pure electric drive mode (having three gears: the first dual-motor pure electric mode, the third The second dual-motor pure electric mode and the third dual-motor pure electric mode), hybrid drive mode (with E-CVT mode-the first hybrid drive mode, and third gear: the second hybrid drive mode, the third hybrid drive mode and the fourth There are five working modes including hybrid drive mode), engine direct drive mode (with three gears: first engine direct drive mode, second engine direct drive mode and third engine direct drive mode) and extended range mode;

Among them, the aforementioned five working modes are reflected in Table 2. C1, C2, C3 and S (S2, S3) in Table 2 and Figures 2 to 13 represent the first clutch 4, the second clutch 5 and the third clutch respectively. 6 and synchronizer 10; when S2 is combined, the synchronizer 10 effectively connects the second reduction gear pair 16 between the first input shaft 12 and the intermediate shaft 14; when S3 is combined, the synchronizer 10 effectively connects the third reduction gear pair 17 Connected between the first input shaft 12 and the intermediate shaft 14 .

Table 2

The following modes illustrate the power transmission route of the power split hybrid coupling system in conjunction with Figures 2 to 13;

(1) Single motor pure electric mode

The second clutch 5 is disconnected, the third clutch 6 is disconnected, the synchronizer 10 is disconnected, the engine 1 and the generator 2 do not work, and the drive motor 3 is driven to establish a single-motor pure electric mode;

Specifically, as shown in Figure 2, the power transmission route in this drive mode is: drive motor 3->fourth reduction gear pair 18->intermediate shaft 14->fifth reduction gear pair 19->differential 20- 〉Wheel 21.

When the power battery is fully charged, the power-split hybrid coupling system can enter single-motor pure electric mode, suitable for full vehicle speed.

(2) The first dual-motor pure electric drive mode

Combined with the second clutch 5, the third clutch 6 is disconnected, the synchronizer 10 is combined with the third reduction gear pair 17, the engine 1 does not work, the generator 2 and the drive motor 3 are driven together to establish the first dual-motor pure electric mode;

Specifically, as shown in Figure 3, the power transmission route 1 in this driving mode is: generator 2 -> planetary train 11 -> first input shaft 12 -> synchronizer 10, third reduction gear pair 17 -> middle Shaft 14->fifth reduction gear pair 19->differential 20->wheel 21,

The power transmission route 2 is: drive motor 3->fourth reduction gear pair 18->intermediate shaft 14->fifth reduction gear pair 19->differential 20->wheel 21.

When the power battery is fully charged, the power split hybrid coupling system can enter the first dual-motor pure electric drive mode, suitable for full vehicle speed.

(3) Second dual-motor pure electric drive mode

The second clutch 5 is combined, the third clutch 6 is disconnected, the synchronizer 10 is combined with the second reduction gear pair 16, the engine 1 does not work, the generator 2 and the drive motor 3 are driven together to establish the second dual-motor pure electric mode;

Specifically, as shown in Figure 4, the power transmission route 1 in this driving mode is: generator 2 -> planetary train 11 -> first input shaft 12 -> synchronizer 10, second reduction gear pair 16 -> middle Shaft 14->fifth reduction gear pair 19->differential 20->wheel 21,

The power transmission route 2 is: drive motor 3->fourth reduction gear pair 18->intermediate shaft 14->fifth reduction gear pair 19->differential 20->wheel 21.

When the power battery is fully charged, the power split hybrid coupling system can enter the second dual-motor pure electric drive mode, suitable for full vehicle speed.

(4) The third dual-motor pure electric drive mode

Combine the second clutch 5 and the third clutch 6, disconnect the synchronizer 10, the engine 1 does not work, the generator 2 and the drive motor 3 drive together to establish the third dual-motor pure electric mode;

Specifically, as shown in Figure 5, the power transmission route 1 in this driving mode is: generator 2 -> planetary train 11 -> third clutch 6, first reduction gear pair 15 -> intermediate shaft 14 -> fifth Reduction gear pair 19->differential 20->wheel 21,

The power transmission route 2 is: drive motor 3->fourth reduction gear pair 18->intermediate shaft 14->fifth reduction gear pair 19->differential 20->wheel 21.

When the power battery is fully charged, the power split hybrid coupling system can enter the third dual-motor pure electric drive mode, suitable for full vehicle speed.

(6) First hybrid drive mode (E-CVT mode)

Disconnect the second clutch 5, combine with the third clutch 6, disconnect the synchronizer 10, the engine 1 drives, the generator 2 generates electricity under the drive of the engine 1, and the drive motor 3 assists in driving to establish the first hybrid driving mode;

Specifically, as shown in Figure 6, the power transmission route 1 in this driving mode is: engine 1 -> first input shaft 12 -> planetary train 11 -> third clutch 6, first reduction gear pair 15 -> middle Shaft 14->fifth reduction gear pair 19->differential 20->wheel 21,

The power transmission route 2 is: engine 1->first input shaft 12->planetary row 11->generator 2,

The power transmission route 3 is: drive motor 3->fourth reduction gear pair 18->intermediate shaft 14->fifth reduction gear pair 19->differential 20->wheel 21.

When the vehicle speed requirement is medium or low, the power split hybrid coupling system can enter the first hybrid drive mode, and the engine 1 and the drive motor 3 jointly drive the wheels 21 . At the same time, when the power battery is insufficient, the engine 1 can be used to drive the generator 2 to generate electricity for the power battery.

(7) Second hybrid drive mode

The second clutch 5 is combined, the third clutch 6 is disconnected, the synchronizer 10 is combined with the third reduction gear pair 17, the engine 1 drives, the generator 2 generates electricity under the drive of the engine 1, and the drive motor 3 assists in driving to establish the second mixture. drive mode;

Specifically, as shown in Figure 7, the power transmission route 1 in this driving mode is: engine 1->first input shaft 12->synchronizer 10, third reduction gear pair 17->intermediate shaft 14->fifth Reduction gear pair 19->differential 20->wheel 21,

The power transmission route 2 is: engine 1->first input shaft 12->planetary row 11->generator 2,

The power transmission route 3 is: drive motor 3->fourth reduction gear pair 18->intermediate shaft 14->fifth reduction gear pair 19->differential 20->wheel 21.

When the vehicle speed requirement is medium to high speed, the power split hybrid coupling system can enter the second hybrid drive mode, and the engine 1 and the drive motor 3 jointly drive the wheels 21 . At the same time, when the power battery is insufficient, the engine 1 can be used to drive the generator 2 to generate electricity for the power battery.

(8)Third hybrid drive mode

The second clutch 5 is combined, the third clutch 6 is disconnected, the synchronizer 10 is combined with the second reduction gear pair 16, the engine 1 drives, the generator 2 generates electricity under the drive of the engine 1, and the drive motor 3 assists in driving to establish the third hybrid drive mode;

Specifically, as shown in Figure 8, the power transmission route 1 in this driving mode is: engine 1->first input shaft 12->synchronizer 10, second reduction gear pair 16->intermediate shaft 14->fifth Reduction gear pair 19->differential 20->wheel 21,

The power transmission route 2 is: engine 1->first input shaft 12->planetary row 11->generator 2,

The power transmission route 3 is: drive motor 3->fourth reduction gear pair 18->intermediate shaft 14->fifth reduction gear pair 19->differential 20->wheel 21.

When the vehicle speed requirement is high, the power split hybrid coupling system can enter the third hybrid drive mode, and the engine 1 and the drive motor 3 jointly drive the wheels 21 . At the same time, when the power battery is insufficient, the engine 1 can be used to drive the generator 2 to generate electricity for the power battery.

(9)Fourth hybrid drive mode

Combine the second clutch 5 and the third clutch 6, disconnect the synchronizer 10, the engine 1 drives, the generator 2 generates electricity under the drive of the engine 1, and the drive motor 3 drives to establish the fourth hybrid drive mode;

Specifically, as shown in Figure 9, the power transmission route 1 in this driving mode is: engine 1 -> first input shaft 12 -> planetary train 11 -> third clutch 6, first reduction gear pair 15 -> middle Shaft 14->fifth reduction gear pair 19->differential 20->wheel 21,

The power transmission route 2 is: engine 1->first input shaft 12->planetary row 11->generator 2,

The power transmission route 3 is: drive motor 3->fourth reduction gear pair 18->intermediate shaft 14->fifth reduction gear pair 19->differential 20->wheel 21.

When the vehicle speed requirement is high, the power split hybrid coupling system can enter the fourth hybrid drive mode, and the engine 1 and the drive motor 3 jointly drive the wheels 21 . At the same time, when the power battery is insufficient, the engine 1 can be used to drive the generator 2 to generate electricity for the power battery.

(10) First engine direct drive mode

The second clutch 5 is disconnected, the third clutch 6 is disconnected, the synchronizer 10 is combined with the third reduction gear pair 17, the engine 1 is driven, and the generator 2 and the drive motor 3 do not work to establish the first engine direct drive mode;

Specifically, as shown in Figure 10, the power transmission route in this driving mode is: engine 1->first input shaft 12->synchronizer 10, third reduction gear pair 17->intermediate shaft 14->fifth reduction Gear pair 19->differential 20->wheel 21.

When the vehicle speed is medium to high, the power split hybrid coupling system can enter the first engine direct drive mode, and engine 1 works in the high-efficiency range, especially when the power battery is insufficient.

(11) Second engine direct drive mode

The second clutch 5 is disconnected, the third clutch 6 is disconnected, the synchronizer 10 is combined with the second reduction gear pair 16, the engine 1 is driven, and the generator 2 and the drive motor 3 do not work to establish the second engine direct drive mode;

Specifically, as shown in Figure 11, the power transmission route in this driving mode is: engine 1->first input shaft 12->synchronizer 10, second reduction gear pair 16->intermediate shaft 14->fifth reduction Gear pair 19->differential 20->wheel 21.

When the vehicle speed requires high speed, the power split hybrid coupling system can enter the second engine direct drive mode, and engine 1 works in the high-efficiency range, especially when the power battery is insufficient.

(12) Third engine direct drive mode

Combine the second clutch 5 and the third clutch 6, disconnect the synchronizer 10, the engine 1 drives, the generator 2 and the drive motor 3 do not work to establish the third engine direct drive mode;

Specifically, as shown in Figure 12, the power transmission route in this driving mode is: engine 1 -> first input shaft 12 -> planetary train 11 -> third clutch 6, first reduction gear pair 15 -> intermediate shaft 14->fifth reduction gear pair 19->differential 20->wheel 21.

When the vehicle speed requires high speed, the power split hybrid coupling system can enter the third engine direct drive mode, and engine 1 works in the high-efficiency range, especially when the power battery is insufficient.

(13) Extended range mode

Combined with the second clutch 5, the third clutch 6 is disconnected, the synchronizer 10 is disconnected, the engine 1 drives the generator 2 to generate electricity, and the drive motor 3 drives to establish the extended range mode;

Specifically, as shown in Figure 13, the power transmission route 1 in this driving mode is: engine 1->first input shaft 12->planetary row 11->generator 2,

The power transmission route 2 is: drive motor 3->fourth reduction gear pair 18->intermediate shaft 14->fifth reduction gear pair 19->differential 20->wheel 21.

When the power battery is insufficient, the power split hybrid coupling system can enter the extended range mode, suitable for medium and low speeds.

(14) Parking power generation mode

The first clutch 4 is disconnected, the second clutch 5 is disconnected, the third clutch 6 is disconnected, the synchronizer 10 is disconnected, the engine 1 and the generator 2 do not work, the drive motor 3 generates braking torque and induces induction in its windings. The current charges the power battery to establish the parking power generation mode;

When the vehicle is braking, the power-split hybrid coupling system can enter the parking power generation mode, and the driving motor 3 generates braking torque to brake the wheel 21. At the same time, the winding of the driving motor 3 will generate an induced current to charge the power battery to achieve braking. Energy recovery.

In addition, when the first clutch 4 is provided, as shown in Table 2, when only the engine 1 is required to participate in driving or generating electricity, the first clutch 4 can be combined, and when the engine 1 is not required to operate, the first clutch 4 can be disconnected.

Embodiment 3

When the second clutch 5, the third clutch 6, the fourth clutch 7 and the fifth clutch 8 are provided, the power split hybrid coupling system has a single motor pure electric mode and a dual motor pure electric drive mode (with three gears: the first dual Motor pure electric mode, second dual motor pure electric mode and third dual motor pure electric mode), hybrid drive mode (with E-CVT mode - first hybrid drive mode, and third gear: second hybrid drive mode, third Five working modes including hybrid drive mode and fourth hybrid drive mode), engine direct drive mode (with three gears: first engine direct drive mode, second engine direct drive mode and third engine direct drive mode) and extended range mode ;

Among them, the aforementioned five working modes are reflected in Table 3. C1, C2, C3, C4, and C5 in Table 3 and Figures 15 to 26 represent the first clutch 4, the second clutch 5, the third clutch 6, and the third clutch respectively. Fourth clutch 7, fifth clutch 8.

table 3

The following modes, combined with Figures 15 to 26, illustrate the power transmission route of the power split hybrid coupling system.

(1) Single motor pure electric mode

The second clutch 5 is disconnected, the third clutch 6 is disconnected, the fourth clutch 7 is disconnected, and the fifth clutch 8 is disconnected. The engine 1 and the generator 2 do not work, and the drive motor 3 is driven to establish a single-motor pure electric mode;

Specifically, as shown in Figure 15, the power transmission route in this driving mode is: drive motor 3->fourth reduction gear pair 18->intermediate shaft 14->fifth reduction gear pair 19->differential 20- 〉Wheel 21.

When the power battery is fully charged, the power-split hybrid coupling system can enter single-motor pure electric mode, suitable for full vehicle speed.

(2) The first dual-motor pure electric drive mode

Combine the second clutch 5, disconnect the third clutch 6, disconnect the fourth clutch 7, combine the fifth clutch 8, the engine 1 does not work, the generator 2 and the drive motor 3 drive together to establish the first dual-motor pure electric model;

Specifically, as shown in Figure 16, the power transmission route 1 in this driving mode is: generator 2 -> planetary train 11 -> first input shaft 12 -> fifth clutch 8, third reduction gear pair 17 -> Counter shaft 14->fifth reduction gear pair 19->differential 20->wheel 21,

The power transmission route 2 is: drive motor 3->fourth reduction gear pair 18->intermediate shaft 14->fifth reduction gear pair 19->differential 20->wheel 21.

When the power battery is fully charged, the power split hybrid coupling system can enter the first dual-motor pure electric drive mode, suitable for full vehicle speed.

(3) Second dual-motor pure electric drive mode

Combine the second clutch 5, disconnect the third clutch 6, combine the fourth clutch 7, disconnect the fifth clutch 8, the engine 1 does not work, the generator 2 and the drive motor 3 drive together to establish a second dual-motor pure electric model;

Specifically, as shown in Figure 17, the power transmission route 1 in this driving mode is: generator 2 -> planetary train 11 -> first input shaft 12 -> fourth clutch 7, second reduction gear pair 16 -> Counter shaft 14->fifth reduction gear pair 19->differential 20->wheel 21,

The power transmission route 2 is: drive motor 3->fourth reduction gear pair 18->intermediate shaft 14->fifth reduction gear pair 19->differential 20->wheel 21.

When the power battery is fully charged, the power split hybrid coupling system can enter the second dual-motor pure electric drive mode, suitable for full vehicle speed.

(4) The third dual-motor pure electric drive mode

Combine the second clutch 5, combine with the third clutch 6, disconnect the fourth clutch 7, disconnect the fifth clutch 8, the engine 1 does not work, the generator 2 and the drive motor 3 drive together to establish a third dual-motor pure electric model;

Specifically, as shown in Figure 18, the power transmission route 1 in this driving mode is: generator 2 -> planetary gearbox 11 -> third clutch 6, first reduction gear pair 15 -> intermediate shaft 14 -> fifth Reduction gear pair 19->differential 20->wheel 21,

The power transmission route 2 is: drive motor 3->fourth reduction gear pair 18->intermediate shaft 14->fifth reduction gear pair 19->differential 20->wheel 21.

When the power battery is fully charged, the power split hybrid coupling system can enter the third dual-motor pure electric drive mode, suitable for full vehicle speed.

(6) First hybrid drive mode (E-CVT mode)

The second clutch 5 is disconnected, the third clutch 6 is combined, the fourth clutch 7 is disconnected, the fifth clutch 8 is disconnected, the engine 1 drives, the generator 2 generates electricity under the drive of the engine 1, and the drive motor 3 assists in driving to establish First hybrid drive mode;

Specifically, as shown in Figure 19, the power transmission route 1 in this driving mode is: engine 1 -> first input shaft 12 -> planetary train 11 -> third clutch 6, first reduction gear pair 15 -> middle Shaft 14->fifth reduction gear pair 19->differential 20->wheel 21,

The power transmission route 2 is: engine 1->first input shaft 12->planetary row 11->generator 2,

The power transmission route 3 is: drive motor 3->fourth reduction gear pair 18->intermediate shaft 14->fifth reduction gear pair 19->differential 20->wheel 21.

When the vehicle speed requirement is medium or low, the power split hybrid coupling system can enter the first hybrid drive mode, and the engine 1 and the drive motor 3 jointly drive the wheels 21 . At the same time, when the power battery is insufficient, the engine 1 can be used to drive the generator 2 to generate electricity for the power battery.

(7) Second hybrid drive mode

Combine the second clutch 5, disconnect the third clutch 6, disconnect the fourth clutch 7, combine the fifth clutch 8, the engine 1 drives, the generator 2 generates electricity under the drive of the engine 1, and the drive motor 3 assists in driving to establish the third Two hybrid drive modes;

Specifically, as shown in Figure 20, the power transmission route 1 in this driving mode is: engine 1->first input shaft 12->fifth clutch 8, third reduction gear pair 17->intermediate shaft 14->th Five reduction gear pairs 19->differential 20->wheels 21,

The power transmission route 2 is: engine 1->first input shaft 12->planetary row 11->generator 2,

The power transmission route 3 is: drive motor 3->fourth reduction gear pair 18->intermediate shaft 14->fifth reduction gear pair 19->differential 20->wheel 21.

When the vehicle speed requirement is medium to high speed, the power split hybrid coupling system can enter the second hybrid drive mode, and the engine 1 and the drive motor 3 jointly drive the wheels 21 . At the same time, when the power battery is insufficient, the engine 1 can be used to drive the generator 2 to generate electricity for the power battery.

(8)Third hybrid drive mode

Combine the second clutch 5, disconnect the third clutch 6, combine the fourth clutch 7, disconnect the fifth clutch 8, the engine 1 drives, the generator 2 generates electricity under the drive of the engine 1, and the drive motor 3 assists in driving to establish the third Three hybrid drive modes;

Specifically, as shown in Figure 21, the power transmission route 1 in this driving mode is: engine 1 -> first input shaft 12 -> fourth clutch 7, second reduction gear pair 16 -> intermediate shaft 14 -> third Five reduction gear pairs 19->differential 20->wheels 21,

The power transmission route 2 is: engine 1->first input shaft 12->planetary row 11->generator 2,

The power transmission route 3 is: drive motor 3->fourth reduction gear pair 18->intermediate shaft 14->fifth reduction gear pair 19->differential 20->wheel 21.

When the vehicle speed requirement is high, the power split hybrid coupling system can enter the third hybrid drive mode, and the engine 1 and the drive motor 3 jointly drive the wheels 21 . At the same time, when the power battery is insufficient, the engine 1 can be used to drive the generator 2 to generate electricity for the power battery.

(9)Fourth hybrid drive mode

Combine the second clutch 5, combine with the third clutch 6, disconnect the fourth clutch 7, disconnect the fifth clutch 8, the engine 1 drives, the generator 2 generates electricity under the drive of the engine 1, and the drive motor 3 drives to establish the fourth Hybrid drive mode;

Specifically, as shown in Figure 22, the power transmission route 1 in this driving mode is: engine 1 -> first input shaft 12 -> planetary train 11 -> third clutch 6, first reduction gear pair 15 -> middle Shaft 14->fifth reduction gear pair 19->differential 20->wheel 21,

The power transmission route 2 is: engine 1->first input shaft 12->planetary row 11->generator 2,

The power transmission route 3 is: drive motor 3->fourth reduction gear pair 18->intermediate shaft 14->fifth reduction gear pair 19->differential 20->wheel 21.

When the vehicle speed requirement is high, the power split hybrid coupling system can enter the fourth hybrid drive mode, and the engine 1 and the drive motor 3 jointly drive the wheels 21 . At the same time, when the power battery is insufficient, the engine 1 can be used to drive the generator 2 to generate electricity for the power battery.

(10) First engine direct drive mode

The second clutch 5 is disconnected, the third clutch 6 is disconnected, the fourth clutch 7 is disconnected, and the fifth clutch 8 is combined, the engine 1 drives, the generator 2 and the drive motor 3 do not work to establish the first engine direct drive mode;

Specifically, as shown in Figure 23, the power transmission route in this driving mode is: engine 1 -> first input shaft 12 -> fifth clutch 8, third reduction gear pair 17 -> intermediate shaft 14 -> fifth Reduction gear pair 19->differential 20->wheel 21.

When the vehicle speed is medium to high, the power split hybrid coupling system can enter the first engine direct drive mode, and engine 1 works in the high-efficiency range, especially when the power battery is insufficient.

(11) Second engine direct drive mode

Disconnect the second clutch 5, disconnect the third clutch 6, connect the fourth clutch 7, disconnect the fifth clutch 8, the engine 1 drives, the generator 2 and the drive motor 3 do not work to establish the second engine direct drive mode;

Specifically, as shown in Figure 24, the power transmission route in this driving mode is: engine 1 -> first input shaft 12 -> fourth clutch 7, second reduction gear pair 16 -> intermediate shaft 14 -> fifth Reduction gear pair 19->differential 20->wheel 21.

When the vehicle speed requires high speed, the power split hybrid coupling system can enter the second engine direct drive mode, and engine 1 works in the high-efficiency range, especially when the power battery is insufficient.

(12) Third engine direct drive mode

Combine the second clutch 5, combine with the third clutch 6, disconnect the fourth clutch 7, disconnect the fifth clutch 8, the engine 1 drives, the generator 2 and the drive motor 3 do not work to establish the third engine direct drive mode;

Specifically, as shown in Figure 25, the power transmission route in this driving mode is: engine 1 -> first input shaft 12 -> planetary train 11 -> third clutch 6, first reduction gear pair 15 -> intermediate shaft 14->fifth reduction gear pair 19->differential 20->wheel 21.

When the vehicle speed requires high speed, the power split hybrid coupling system can enter the third engine direct drive mode, and engine 1 works in the high-efficiency range, especially when the power battery is insufficient.

(13) Extended range mode

Combine the second clutch 5, disconnect the third clutch 6, disconnect the fourth clutch 7, disconnect the fifth clutch 8, the engine 1 drives the generator 2 to generate electricity, and the drive motor 3 drives to establish the extended range mode;

Specifically, as shown in Figure 26, the power transmission route 1 in this driving mode is: engine 1->first input shaft 12->planetary row 11->generator 2,

The power transmission route 2 is: drive motor 3->fourth reduction gear pair 18->intermediate shaft 14->fifth reduction gear pair 19->differential 20->wheel 21.

When the power battery is insufficient, the power split hybrid coupling system can enter the extended range mode, suitable for medium and low speeds.

(14) Parking power generation mode

The first clutch 4 is disconnected, the second clutch 5 is disconnected, the third clutch 6 is disconnected, the fourth clutch 7 is disconnected, and the fifth clutch 8 is disconnected. The engine 1 and generator 2 do not work, and the driving motor 3 generates braking. torque and generates an induced current in its winding to charge the power battery to establish a parking power generation mode;

When the vehicle is braking, the power-split hybrid coupling system can enter the parking power generation mode, and the driving motor 3 generates braking torque to brake the wheel 21. At the same time, the winding of the driving motor 3 will generate an induced current to charge the power battery to achieve braking. Energy recovery.

In addition, when the first clutch 4 is provided, as shown in Table 3, when the engine 1 is only required to participate in driving or generating electricity, the first clutch 4 can be combined, and when the engine 1 is not required to operate, the first clutch 4 can be disconnected.

An embodiment of the present invention also provides a vehicle, including a controller and a power battery connected to the controller, and the power split hybrid coupling system described in any of the previous embodiments. The engine 1, the generator 2 and the drive motor 3 are connected to controller and controlled by the controller.

In one embodiment, the five driving modes of the power split hybrid coupling system (single motor pure electric mode, dual motor pure electric drive mode, hybrid drive mode, engine direct drive mode and Extended range mode), the control process for automatically switching between five driving modes includes the following steps:

S1. The controller determines the relationship between the battery SOC value and the first threshold, or simultaneously determines the relationship between the battery SOC value and the first threshold and the relationship between the vehicle speed and the second threshold;

S2. The controller switches the working mode of the power split hybrid coupling system according to the judgment result of step S1;

S3. During braking, the controller controls the driving motor 3 to generate braking torque and induce current in its winding to charge the power battery.

Among them, the first threshold is used to determine the level of the battery SOC value, and the second threshold is used to determine the level of the vehicle speed. This embodiment does not limit the value range of the first threshold and the second threshold, and can usually be freely determined according to the specific control strategy. Setting, under different control strategies, the values of the first threshold and the second threshold are different. After the first threshold and the second threshold are set in the controller, the controller automatically performs the judgment in step S1 and automatically switches among the five driving modes according to the judgment result in step S1.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. Inside.

Claims (8)

1. The power split hybrid power coupling system comprises an engine, a generator and a driving motor, and is characterized by further comprising a second clutch, a third clutch, a gear shifter, a planet row, a first input shaft, an intermediate shaft, a first reduction gear pair and a second reduction gear pair with a speed ratio different from that of the first reduction gear pair;

an output shaft of the engine is connected with the first input shaft;

the first input shaft is in deceleration connection with the intermediate shaft through the gear shifter and the second reduction gear pair, and the gear shifter is used for connecting or disconnecting the effective connection of the second reduction gear pair to the first input shaft and the intermediate shaft;

the output shaft of the generator is rotatably sleeved on the first input shaft;

the planet row comprises a sun gear, a planet carrier and an inner gear ring; the sun gear is arranged on an output shaft of the generator, the planet carrier is connected with the first input shaft, the annular gear is connected with the output shaft of the generator through the second clutch, and the annular gear is also in deceleration connection with the intermediate shaft through the third clutch and the first reduction gear pair;

the driving motor is connected with the intermediate shaft;

The intermediate shaft outputs power to wheels;

the engine is characterized by further comprising a first clutch, wherein an output shaft of the engine is connected with the first input shaft through the first clutch;

the power splitting hybrid power coupling system is provided with a single-motor pure electric mode, a second double-motor pure electric mode, a third double-motor pure electric mode, a first hybrid driving mode, a third hybrid driving mode, a fourth hybrid driving mode, a second engine direct driving mode, a third engine direct driving mode and a range extending mode;

disconnecting the second clutch, disconnecting the third clutch, disconnecting the gear shifter, disabling the engine and the generator, and driving the drive motor to establish the single motor electric-only mode;

disconnecting the third clutch in combination with the second clutch, disabling the engine in combination with the shifter, and driving the generator and the drive motor together to establish the second two-motor electric-only mode;

the second clutch is combined, the third clutch is combined, the gear shifter is disconnected, the engine does not work, the generator and the driving motor are driven to jointly drive, and therefore a third double-motor pure electric mode is established;

Disconnecting the second clutch, combining the third clutch, disconnecting the gear shifter, driving the engine, generating electricity by the generator under the driving of the engine, and assisting the driving motor to drive so as to establish the first hybrid driving mode;

the second clutch is combined, the third clutch is disconnected, the engine is driven by the gear shifter, the generator generates electricity under the driving of the engine, and the driving motor assists in driving so as to establish the third hybrid driving mode;

the second clutch is combined, the third clutch is combined, the gear shifter is disconnected, the engine is driven, the generator generates electricity under the driving of the engine, and the driving motor is driven to establish the fourth hybrid driving mode;

disconnecting the second clutch, disconnecting the third clutch, and in combination with the shifter, the engine is driven, the generator and the drive motor are not operated to establish the second engine direct drive mode;

disconnecting the shifter in combination with the second clutch and the third clutch, the engine being driven, the generator and the drive motor being deactivated to establish the third engine direct drive mode;

And combining the second clutch, disconnecting the third clutch, disconnecting the gear shifter, driving the generator to generate power by the engine, and driving the motor to establish the range-extending mode.

2. The power splitting hybrid coupling system of claim 1, further comprising a third reduction gear pair;

the gear shifter is a fourth clutch, the first input shaft is also in deceleration connection with the intermediate shaft through a fifth clutch and the third reduction gear pair, or

The gear shifter is a synchronizer, and the first input shaft is also in deceleration connection with the intermediate shaft through the synchronizer and the third reduction gear pair.

3. The power split hybrid coupling system of claim 2, further comprising a second input shaft when the shifter is a fourth clutch; the fourth clutch and the fifth clutch are integrated into a double clutch sharing the same clutch housing, the first input shaft is connected with the clutch housing, the second input shaft is connected with the fifth clutch, the third reduction gear pair is in reduction connection with the second input shaft and the intermediate shaft, and the second reduction gear pair is rotatably arranged on the second input shaft and connected with the fourth clutch.

4. The power splitting hybrid coupling system of claim 2, wherein the first reduction gear pair comprises a first gear and a second gear that intermesh;

the first gear is rotatably arranged on the first input shaft, the second gear is fixedly arranged on the intermediate shaft, and the inner gear ring is connected with the first gear through the third clutch;

the second reduction gear pair comprises a third gear and a fourth gear which are meshed with each other;

the third gear is rotatably arranged on the first input shaft, the gear shifter is arranged on the first input shaft and used for being combined with the third gear, and the fourth gear is fixedly arranged on the intermediate shaft; or the third gear is fixedly arranged on the first input shaft, the fourth gear is rotatably arranged on the intermediate shaft, and the gear shifter is arranged on the intermediate shaft and used for combining the fourth gear;

the third reduction gear pair comprises a fifth gear and a sixth gear which are meshed with each other;

when the fifth clutch is provided: the fifth gear is rotatably arranged on the first input shaft, the fifth clutch is connected between the fifth gear and the first input shaft, and the sixth gear is fixedly arranged on the intermediate shaft; or the fifth gear is fixedly arranged on the first input shaft, the sixth gear is rotatably arranged on the intermediate shaft, and the fifth clutch is connected between the sixth gear and the intermediate shaft;

The gear shifter is the synchronizer and is arranged on the first input shaft: the fifth gear is rotatably arranged on the first input shaft, the synchronizer is also used for combining the fifth gear, and the sixth gear is fixedly arranged on the intermediate shaft;

the gear shifter is the synchronizer and is arranged on the intermediate shaft: the fifth gear is fixedly arranged on the first input shaft, the sixth gear is rotatably arranged on the intermediate shaft, and the synchronizer is further used for combining the sixth gear.

5. The power splitting hybrid coupling system of claim 3, wherein the first reduction gear pair comprises a first gear and a second gear that intermesh; the first gear is rotatably arranged on the first input shaft, the second gear is fixedly arranged on the intermediate shaft, and the inner gear ring is connected with the first gear through the third clutch;

the second reduction gear pair comprises a third gear and a fourth gear which are meshed with each other; the third gear is rotatably arranged on the second input shaft, and the fourth gear is fixedly arranged on the intermediate shaft;

the third reduction gear pair comprises a fifth gear and a sixth gear which are meshed with each other; the fifth gear is fixedly arranged on the second input shaft, and the sixth gear is fixedly arranged on the intermediate shaft.

6. The power splitting hybrid coupling system of claim 4 or 5, further comprising a fourth reduction gear pair, the drive motor being in reduction connection with the intermediate shaft through the fourth reduction gear pair;

the fourth reduction gear pair comprises a seventh gear arranged on an output shaft of the driving motor and a fourth driven gear which is arranged on the intermediate shaft and meshed with the seventh gear;

the fourth driven gear is any one of the sixth gear, the fourth gear and the second gear, which is fixedly connected with the intermediate shaft.

7. The power-split hybrid coupling system of claim 2, wherein the power-split hybrid coupling system has a single-motor electric-only mode, a first dual-motor electric-only mode, a second dual-motor electric-only mode, a third dual-motor electric-only mode, a first hybrid drive mode, a second hybrid drive mode, a third hybrid drive mode, a fourth hybrid drive mode, a first engine direct drive mode, a second engine direct drive mode, a third engine direct drive mode, and an extended range mode;

when the shifter is a synchronizer:

Disconnecting the second clutch, disconnecting the third clutch, disconnecting the synchronizer, disabling the engine and the generator, and driving the drive motor to establish the single motor electric-only mode;

the third clutch is disconnected by combining the second clutch, the synchronizer is combined with the third reduction gear pair, the engine does not work, and the generator and the driving motor are driven to jointly drive so as to establish the first double-motor pure electric mode;

the third clutch is disconnected by combining the second clutch, the synchronizer is combined with the second reduction gear pair, the engine does not work, and the generator and the driving motor are driven to jointly drive so as to establish the second double-motor pure electric mode;

the second clutch is combined, the third clutch is combined, the synchronizer is disconnected, the engine does not work, the generator and the driving motor are driven to jointly drive, and therefore a third double-motor pure electric mode is established;

disconnecting the second clutch, combining the third clutch, disconnecting the synchronizer, driving the engine, generating electricity by the generator under the driving of the engine, and assisting the driving motor to drive so as to establish the first hybrid driving mode;

The third clutch is disconnected by combining the second clutch, the synchronizer is combined with the third reduction gear pair, the engine is driven, the generator generates electricity under the driving of the engine, and the driving motor assists in driving so as to establish the second hybrid driving mode;

the third clutch is disconnected by combining the second clutch, the synchronizer is combined with the second reduction gear pair, the engine is driven, the generator generates electricity under the driving of the engine, and the driving motor is driven in an auxiliary mode to establish the third hybrid driving mode;

the second clutch is combined, the third clutch is combined, the synchronizer is disconnected, the engine is driven, the generator generates electricity under the driving of the engine, and the driving motor is driven to establish the fourth hybrid driving mode;

disconnecting the second clutch, disconnecting the third clutch, combining the third reduction gear pair by the synchronizer, driving the engine, and disabling the generator and the driving motor to establish the first engine direct drive mode;

disconnecting the second clutch, disconnecting the third clutch, combining the synchronizer with the second reduction gear pair, driving the engine, and disabling the generator and the driving motor to establish the second engine direct drive mode;

The second clutch is combined, the third clutch is combined, the synchronizer is disconnected, the engine is driven, the generator and the driving motor are not operated, and the third engine direct-drive mode is established;

the third clutch is disconnected by combining the second clutch, the synchronizer is disconnected, the engine drives the generator to generate power, and the driving motor is driven to establish the range-extending mode;

when the shifter is a fourth clutch:

disconnecting the second clutch, disconnecting the third clutch, disconnecting the fourth clutch, disconnecting the fifth clutch, the engine and the generator are not operated, and the driving motor is driven to establish the single-motor pure electric mode;

the second clutch is combined, the third clutch is disconnected, the fourth clutch is disconnected, the fifth clutch is combined, the engine is not operated, and the generator and the driving motor are driven to jointly drive so as to establish the first double-motor pure electric mode;

the third clutch is disconnected by combining the second clutch, the fifth clutch is disconnected by combining the fourth clutch, the engine is not operated, and the generator and the driving motor are driven to jointly drive so as to establish the second double-motor pure electric mode;

Combining the second clutch, combining the third clutch, disconnecting the fourth clutch, disconnecting the fifth clutch, enabling the engine to be inoperative, and enabling the generator and the driving motor to be driven together so as to establish the third double-motor pure electric mode;

disconnecting the second clutch, combining the third clutch, disconnecting the fourth clutch, disconnecting the fifth clutch, driving the engine, generating electricity by the generator under the driving of the engine, and assisting the driving motor to drive so as to establish the first hybrid driving mode;

combining the second clutch, disconnecting the third clutch, disconnecting the fourth clutch, combining the fifth clutch, driving the engine, generating electricity by the generator under the driving of the engine, and assisting the driving motor to drive so as to establish the second hybrid driving mode;

the third clutch is disconnected by combining the second clutch, the fifth clutch is disconnected by combining the fourth clutch, the engine is driven, the generator generates electricity under the driving of the engine, and the driving motor assists in driving so as to establish the third hybrid driving mode;

Combining the second clutch, combining the third clutch, disconnecting the fourth clutch, disconnecting the fifth clutch, driving the engine, generating electricity by the generator driven by the engine, and driving the driving motor to establish the fourth hybrid driving mode;

disconnecting the second clutch, disconnecting the third clutch, disconnecting the fourth clutch, combining the fifth clutch, driving the engine, and disabling the generator and the driving motor to establish the first engine direct drive mode;

disconnecting the second clutch, disconnecting the third clutch, connecting the fourth clutch, disconnecting the fifth clutch, and the engine is driven, and the generator and the driving motor are not operated to establish the second engine direct drive mode;

combining the second clutch, combining the third clutch, disconnecting the fourth clutch, disconnecting the fifth clutch, driving the engine, and disabling the generator and the driving motor to establish the third engine direct drive mode;

and combining the second clutch, disconnecting the third clutch, disconnecting the fourth clutch, disconnecting the fifth clutch, driving the generator by the engine to generate electricity, and driving the generator by the driving motor to establish the range-extending mode.

8. A vehicle comprising a controller and a battery connected to the controller, further comprising the power splitting hybrid coupling system of any of claims 1-7, the engine, the generator, and the drive motor being connected to and controlled by the controller.