Driving system and vehicle

Abstract

The invention particularly relates to a driving system and a vehicle. The driving system comprises an engine, a differential mechanism, a first motor, a second motor, a first planet row, a second planet row, a first brake, a second brake, a clutch and an intermediate shaft transmission assembly. The first planet row comprises a first sun gear, a first planet carrier and a first inner gear ring, the first sun gear is connected with the engine, a plurality of first planet gears are arranged on the first planet carrier, the first planet gears are meshed with the first inner gear ring and the first sun gear respectively, and the first planet carrier is connected with the intermediate shaft transmission assembly; the second planet row comprises a second sun gear, a second planet carrier and a second inner gear ring, a plurality of second planet gears are arranged on the second planet carrier, the second planet gears are meshed with the second inner gear ring and the second sun gear respectively, and the second planet carrier is connected with the first brake and the clutch; the second motor is connected with the differential mechanism through the intermediate shaft transmission assembly. And good economical efficiency and dynamic property are achieved, the overall integration is high, and the structure is compact.

Description

Technical Field

[0001] The present application belongs to the field of vehicle technology, and specifically relates to a drive system and a vehicle. Background Art

[0002] In recent years, the emergence of electric motor hybrid technology has opened up new avenues for achieving perfect power matching between internal combustion engines and driven wheels. Among the numerous powertrain designs, the most representative are series hybrid and parallel hybrid systems. In a series hybrid system, an internal combustion engine, a generator, an electric motor, a shaft system, and drive wheels form a series power train, resulting in an extremely simple powertrain structure. The generator-motor combination can be considered a traditional transmission. When combined with energy storage devices such as batteries and capacitors, the transmission can also serve as an energy conditioning device, independently regulating speed and torque.

[0003] The parallel motor system has two independent, parallel powertrains. One consists of a traditional mechanical transmission, and the other comprises a motor-battery system. The mechanical transmission regulates speed, while the motor-battery system regulates power or torque. To fully realize the potential of the entire system, the mechanical transmission must also employ a continuously variable transmission.

[0004] The advantages of a series hybrid system lie in its simple structure and flexible layout. However, since all power flows through the generator and electric motor, the motors require high power, are bulky, and heavy. Furthermore, because the energy transfer process involves two stages of mechanical-to-electrical and electric-to-mechanical conversion, the overall system efficiency is low. In a parallel hybrid system, only a portion of the power flows through the electric motor system, requiring relatively low motor power. This results in high overall system efficiency. However, this system requires two independent subsystems, resulting in high costs and is generally only used in mild hybrid systems. Summary of the Invention

[0005] The purpose of this application is to provide a drive system and a vehicle with good power and economy, a high degree of overall integration and a compact structure.

[0006] A first aspect of the present application provides a drive system comprising an engine and a differential, the drive system further comprising a first motor, a second motor, a first planetary gear set, a second planetary gear set, a first brake, a second brake, a clutch, and an intermediate shaft transmission assembly, wherein the intermediate shaft transmission assembly is connected to the differential; The first planetary gear comprises a first sun gear, a first planet carrier and a first inner ring gear, the first sun gear is connected to the engine, the first planet carrier is provided with a plurality of first planetary gears, the first planetary gears are respectively engaged with the first inner ring gear and the first sun gear, and the first planet carrier is connected to the intermediate shaft transmission assembly; The second planetary gear comprises a second sun gear, a second planet carrier, and a second inner ring gear. The second planet carrier is provided with a plurality of second planetary gears, and the second planetary gears are respectively engaged with the second inner ring gear and the second sun gear. The second planet carrier is connected to the first brake and the clutch, and the second inner ring gear is connected to the first planet carrier. The first motor is connected to the second sun gear, the second brake and the clutch; The second motor is connected to the differential through the intermediate shaft transmission assembly; The first brake and the second brake are coaxially arranged, and the second brake is arranged on a side of the first brake close to the first motor.

[0007] In an exemplary embodiment of the present application, the clutch and the first brake are arranged sequentially in a radial direction, and the first brake is arranged on the outer hub side of the clutch.

[0008] In an exemplary embodiment of the present application, the outer hub of the first brake and the outer hub of the second brake are both fixed on the housing.

[0009] In an exemplary embodiment of the present application, the first ring gear and the second planet carrier are connected as a whole, the second planet carrier is connected to the inner hub of the first brake, and the second planet carrier is connected to the outer hub of the clutch.

[0010] In an exemplary embodiment of the present application, the intermediate shaft transmission assembly includes a driven gear, an intermediate shaft, a driving gear, and an output gear, the driven gear is connected to the driving gear through the intermediate shaft, and the driving gear is connected to the differential through the output gear; Wherein, the driven gear is connected to the second motor and the first planetary carrier respectively.

[0011] In an exemplary embodiment of the present application, the drive system has a pure electric mode, a power split mode, a first parallel hybrid mode, a second parallel hybrid mode, and a third parallel hybrid mode; When in the pure electric mode, the first brake, the second brake, and the clutch are all in a disengaged state, the engine and the first motor are not operating, and the second motor is operating; When in the power split mode, the first brake, the second brake, and the clutch are all in a disengaged state, and the engine, the first motor, and the second motor are all in operation; When in the first parallel hybrid mode, the first brake is in an engaged state, the second brake and the clutch are both in a disengaged state, and the engine and the second motor are both operating; When in the second parallel hybrid mode, the first brake and the clutch are both in a disengaged state, the second brake is in an engaged state, and the engine and the second motor are both in operation; When in the third parallel hybrid mode, the first brake and the second brake are both in a disengaged state, the clutch is in an engaged state, and the engine and the second motor are both operating.

[0012] In an exemplary embodiment of the present application, when in the power split mode, the second motor can be in a power generation state, and the first motor receives the electric energy transmitted by the second motor to be driven.

[0013] In an exemplary embodiment of the present application, when in the first parallel hybrid mode, the first ring gear and the second planet carrier are locked, the power of the engine is transmitted to the first planet carrier through the first sun gear, and the first planet carrier outputs the power to the differential through the intermediate shaft transmission assembly.

[0014] In an exemplary embodiment of the present application, when in the third parallel hybrid mode, the first ring gear, the second planetary carrier, and the second sun gear are fixedly connected; the power of the engine is transmitted to the first planetary carrier through the first sun gear, and the first planetary carrier outputs the power to the differential through the intermediate shaft transmission assembly.

[0015] A second aspect of the present application provides a vehicle, comprising a controller and any one of the drive systems described above, wherein the engine, the first motor and the second motor are connected to the controller and controlled by the controller.

[0016] This application has the following beneficial effects: The present application solution includes a drive system and a vehicle. This drive system has a high degree of integration, a compact structure, and multiple operating modes. It can cover hybrid electric vehicle (HEV) and plug-in hybrid electric vehicle (PHEV) models, and can achieve good power and economy under different working conditions.

[0017] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by practice of the present application.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0020] Figure 1 A schematic structural diagram of the drive system provided in Embodiment 1 or 2 of the present application is shown; Figure 2 shows a collinear diagram of the drive system provided in the first embodiment of the present application in pure electric mode; Figure 3 shows a collinear diagram of the drive system provided in the power split mode according to the first embodiment of the present application; Figure 4 shows a collinear diagram of the drive system provided in the first parallel hybrid mode according to the first embodiment of the present application; Figure 5 shows a collinear diagram of the drive system provided in the first embodiment of the present application in the second parallel hybrid mode; Figure 6 A collinear diagram of the drive system provided in the first embodiment of the present application in the third parallel hybrid mode is shown.

[0021] Description of reference numerals: 10. Drive system; 100. Engine; 110. Differential; 120. First motor; 130. Second motor; 140. First planetary gear set; 141. First sun gear; 142. First planetary carrier; 143. First internal ring gear; 150. Second planetary gear set; 151. Second sun gear; 152. Second planetary carrier; 153. Second internal ring gear; 160. First brake; 170. Second brake; 180. Clutch; 190. Intermediate shaft transmission assembly; 191. Driven gear; 192. Intermediate shaft; 193. Driving gear; 194. Output gear. DETAILED DESCRIPTION

[0022] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art.

[0023] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0024] In this application, unless otherwise specified or limited, terms such as "assembly" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0025] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner.In the following description, many specific details are provided so as to provide a full understanding of the embodiments of the present application. However, it will be appreciated by those skilled in the art that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps etc. can be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0026] Example 1 See also Figure 1 As shown, embodiment 1 provides a drive system 10, which includes an engine 100, a differential 110, a first motor 120, a second motor 130, a first planetary gear 140, a second planetary gear 150, a first brake 160, a second brake 170, a clutch 180 and an intermediate shaft transmission assembly 190, and the intermediate shaft transmission assembly 190 is connected to the differential 110.

[0027] The driving system 10 may be applied to a plug-in hybrid electric vehicle (PHEV) or a hybrid electric vehicle (HEV) that is charged by an external power source.

[0028] The first motor 120 and the second motor 130 can be motors with a power generation function. The clutch 180 can be, for example, a friction clutch 180 mechanism such as a wet clutch 180, or a meshing clutch 180 mechanism such as a dog clutch 180. The clutch 180 is, for example, hydraulically controlled to engage or release. The first brake 160 and the second brake 170 can be friction-engaging clutch 180 devices similar to the clutch 180, but are not limited thereto. Meshing clutch 180 mechanisms can also be used as brakes, and the first brake 160 and the second brake 170 can be hydraulically controlled to engage or release.

[0029] In the examples of this application, see Figure 1 As shown, the first planetary gear 140 includes a first sun gear 141, a first planetary carrier 142 and a first inner ring gear 143. The first sun gear 141 is connected to the engine 100. The first planetary carrier 142 is provided with a plurality of first planetary gears, which are respectively engaged with the first inner ring gear 143 and the first sun gear 141. The first planetary carrier 142 is connected to the intermediate shaft transmission assembly 190.

[0030] It is understood that the first planetary gear 140 can transmit the power of the engine 100 to the differential 110. The power transmission path of the engine 100 includes: engine 100 → first sun gear 141 → first planetary carrier 142 → intermediate shaft transmission assembly 190 → differential 110.

[0031] See also Figure 1 As shown, the second planetary gear 150 includes a second sun gear 151, a second planetary carrier 152 and a second inner ring gear 153. The second planetary carrier 152 is provided with a plurality of second planetary gears, which are respectively engaged with the second inner ring gear 153 and the second sun gear 151. The second planetary carrier 152 is connected to the first brake 160 and the clutch 180.

[0032] It should be noted that, see Figure 1 As shown, the first motor 120 is connected to the second sun gear 151, the second brake 170, and the clutch 180. The power of the first motor 120 can be transmitted to the second planetary gear set 150, and the first and second planetary gear sets 140 and 150 can be coupled. This decouples the engine 100's speed from the vehicle's wheels, allowing the engine 100 to be regulated via the first motor 120 to achieve optimal vehicle efficiency. The power of the engine 100 and the first motor 120 is combined in the first planetary gear set 142, and then output to the differential 110 via the intermediate shaft transmission assembly 190.

[0033] See also Figure 1As shown, the second motor 130 is connected to the differential 110 via the intermediate shaft transmission assembly 190 . That is, the second motor 130 outputs power to the differential 110 via the intermediate shaft transmission assembly 190 .

[0034] See also Figure 1 As shown, the first brake 160 and the second brake 170 are coaxially arranged, and the second brake 170 is arranged on the side of the first brake 160 close to the first motor 120. In other words, the second brake 170 is close to the first motor 120, and the first brake 160 is close to the second sun gear 151.

[0035] In addition, see Figure 1 As shown, the first brake 160 and the clutch 180 are arranged sequentially in the radial direction, and the first brake 160 is arranged on the outer hub side of the clutch 180. By adopting a stacked arrangement of the first brake 160 and the clutch 180 and sharing a common input hub, the degree of integration is high and the structure is compact.

[0036] It is worth mentioning that see Figure 1 As shown, the outer hubs of the first brake 160 and the second brake 170 are both fixed to the housing and can control the rotation of the second sun gear 151 .

[0037] See also Figure 1 As shown, the first inner ring gear 143 and the second planet carrier 152 are connected as a whole. The second planet carrier 152 is connected to the inner hub of the first brake 160, and the second planet carrier 152 is connected to the outer hub of the clutch 180. In the present application, the first inner ring gear 143 and the second planet carrier 152 are integrally formed. The first inner ring gear 143 is engaged with the gear on the side of the first planet gear away from the first sun gear 141, and the second planet carrier 152 is connected to the outer hub of the clutch 180 and the inner hub of the first brake 160.

[0038] It should be noted that the inner hub of the first brake 160 is connected to the housing. When the first brake 160 is in a braking state, it will control the second planetary carrier 152 to stop rotating, and then control the rotation of the second planetary gear and the second sun gear 151, so as to control the power input into the differential 110.

[0039] In the examples of this application, see Figure 1 As shown, the intermediate shaft transmission assembly 190 includes a driven gear 191, an intermediate shaft 192, a driving gear 193 and an output gear 194. The driven gear 191 is connected to the driving gear 193 through the intermediate shaft 192, and the driving gear 193 is connected to the differential 110 through the output gear 194. The driven gear 191 is connected to the second motor 130 and the first planetary carrier 142 respectively.

[0040] It should be noted that first planetary carrier 142 meshes with driven gear 191 via the input shaft gear, and first planetary carrier 142 and the input shaft gear are connected as a whole. In other words, first planetary carrier 142 transmits power to differential 110 through the input shaft gear, driven gear 191, intermediate shaft 192, driving gear 193, and output gear 194 in sequence.

[0041] Among them, according to the above structure, this drive system 10 has five working modes, namely pure electric mode, power split mode, first parallel hybrid mode, second parallel hybrid mode and third parallel hybrid mode. It can automatically switch between different modes according to the battery SOC (State Of Charge) value, vehicle speed and wheel-end torque demand. The battery SOC value can be understood as the remaining battery power value, that is, these five working modes can automatically switch between different modes according to the remaining battery power value, vehicle speed and wheel-end torque demand.

[0042] In the embodiment of the present application, when the drive system 10 is in pure electric mode, the first brake 160, the second brake 170 and the clutch 180 are all in a disengaged state, the engine 100 and the first motor 120 are not working, and the second motor 130 is working, so as to establish a pure electric mode. Figure 1 and Figure 2 As shown, Figure 2 In FIG. 1 , S1 represents the first sun gear 141 , S2 represents the second sun gear 151 , C1 represents the first planet carrier 142 , C2 represents the second planet carrier 152 , R1 represents the first ring gear, R2 represents the second ring gear, and OUT represents output.

[0043] In this embodiment of the present application, the first brake 160, second brake 170, and clutch 180 are all in the disengaged state, the engine 100 and first motor 120 are both inoperative, and the second motor 130 is in operation. The power generated by the second motor 130 is then transmitted via gears to the driven gear 191, intermediate shaft 192, driving gear 193, and output gear 194, which are then output to the differential 110 and applied to the wheels, thereby achieving pure electric mode. In other words, the power transmission process of the second motor 130 is as follows: Second motor 130 → gear → driven gear 191 → intermediate shaft 192 → driving gear 193 → output gear 194 → differential 110 .

[0044] It should be noted that the first motor 120 can also follow the working power of the second motor 130, and the first motor 120 can be charged.

[0045] In the embodiment of the present application, when the drive system 10 is in the power split mode, the first brake 160, the second brake 170 and the clutch 180 are all in the disengaged state, and the engine 100, the first motor 120 and the second motor 130 are all in operation to establish the power split mode. Figure 1 and Figure 3 As shown, Figure 3 In FIG. 1 , S1 represents the first sun gear 141 , S2 represents the second sun gear 151 , C1 represents the first planet carrier 142 , C2 represents the second planet carrier 152 , R1 represents the first ring gear, R2 represents the second ring gear, and OUT represents output.

[0046] In this embodiment of the present application, the first brake 160, the second brake 170, and the clutch 180 are all in the disengaged state, and the engine 100, the first motor 120, and the second motor 130 are all in the operating state. At this time, the power of the engine 100 is transmitted to the first planetary carrier 142 via the first sun gear 141, and then output to the differential 110 via the driven gear 191, the intermediate shaft 192, the driving gear 193, and the output gear 194. The power of the first motor 120 is transmitted to the second planetary carrier 152 via the second sun gear 151, and then output to the differential 110 via the first planetary carrier 142, the driven gear 191, the intermediate shaft 192, the driving gear 193, and the output gear 194. The power of the second motor 130 is transmitted to the driven gear 191, the intermediate shaft 192, the driving gear 193, and the output gear 194 in sequence, and then output to the differential 110 via the output gear 194. That is, when the drive system 10 is in the power split mode, the power transmission process of the engine 100, the first motor 120 and the second motor 130 is as follows: Engine 100 →first sun gear 141 →first planetary carrier 142 →driven gear 191 →intermediate shaft 192 →drive gear 193 →output gear 194 →differential 110 .

[0047] first motor 120 →second sun gear 151 →second planetary carrier 152 →first planetary carrier 142 →driven gear 191 →intermediate shaft 192 →driving gear 193 →output gear 194 →differential 110 .

[0048] Second motor 130 → gear → driven gear 191 → intermediate shaft 192 → driving gear 193 → output gear 194 → differential 110 .

[0049] It will be appreciated that the power of the engine 100 and the first motor 120 is coupled via the first planetary gear set 140 and the second planetary gear set 150. At this point, the speed of the engine 100 is decoupled from the wheel end, and the first motor 120 can be used to regulate the engine 100 speed to achieve optimal efficiency. The power of the engine 100 and the first motor 120 is combined with the first planetary gear set 142, and then output to the differential 110 via the driven gear 191, the intermediate shaft 192, the driving gear 193, and the output gear 194.

[0050] In addition, in order to maintain power balance, the second motor 130 can also be in a power generation state, transmitting electrical energy to the first motor 120 for driving.

[0051] In the embodiment of the present application, when the drive system 10 is in the first parallel hybrid mode, the first brake 160 is in the engaged state, the second brake 170 and the clutch 180 are both in the disengaged state, and the engine 100 and the second motor 130 are both in operation to establish the first parallel hybrid mode. Figure 1 and Figure 4 As shown, Figure 4 In FIG. 1 , S1 represents the first sun gear 141 , S2 represents the second sun gear 151 , C1 represents the first planet carrier 142 , C2 represents the second planet carrier 152 , R1 represents the first ring gear, R2 represents the second ring gear, and OUT represents output.

[0052] It is understood that this first parallel hybrid mode can be the mode when the engine 100 is in first gear, that is, this operating mode can also be called parallel hybrid mode first gear. In this operating mode, the first brake 160 is engaged, the second brake 170 is disengaged, and the clutch 180 is disengaged. At this time, due to the engagement of the first brake 160, the first ring gear 143 and the second planetary carrier 152 are locked; the power of the engine 100 is transmitted to the first planetary carrier 142 through the first sun gear 141, and then output to the differential 110 through the driven gear 191, the intermediate shaft 192, the driving gear 193, and the output gear 194. The power of the second motor 130 is transmitted to the driven gear 191, the intermediate shaft 192, the driving gear 193, and the output gear 194 in sequence, and then output to the differential 110 through the output gear 194. In other words, when the drive system 10 is in the first parallel hybrid mode, the power transmission process between the engine 100 and the second motor 130 is as follows: Engine 100 →first sun gear 141 →first planetary carrier 142 →driven gear 191 →intermediate shaft 192 →drive gear 193 →output gear 194 →differential 110 .

[0053] Second motor 130 → gear → driven gear 191 → intermediate shaft 192 → driving gear 193 → output gear 194 → differential 110 .

[0054] It should be noted that, since the engine 100 is in the first gear, the speed from the engine 100 to the wheels is relatively large.

[0055] In addition, the first engine 100 can be in a follow-up state or in a working state. When the first engine 100 is in the follow-up state, the second motor 130 can charge the first motor 120.

[0056] In the embodiment of the present application, when the drive system 10 is in the second parallel hybrid mode: the first brake 160 and the clutch 180 are both in the disengaged state, the second brake 170 is in the engaged state, and the engine 100 and the second motor 130 are both in operation to establish the second parallel hybrid mode. Figure 1 and Figure 5 As shown, Figure 5 In FIG. 1 , S1 represents the first sun gear 141 , S2 represents the second sun gear 151 , C1 represents the first planet carrier 142 , C2 represents the second planet carrier 152 , R1 represents the first ring gear, R2 represents the second ring gear, and OUT represents output.

[0057] It is understood that this second parallel hybrid mode can be the mode when the engine 100 is in 2nd gear, that is, this operating mode can also be called parallel hybrid mode 2nd gear. In this operating mode, the first brake 160 is disengaged, the second brake 170 is engaged, and the clutch 180 is disengaged. At this time, the second sun gear 151 is locked; the power of the engine 100 is transmitted to the first planetary carrier 142 through the first sun gear 141, and then output to the differential 110 through the driven gear 191, the intermediate shaft 192, the driving gear 193 and the output gear 194. The power of the second motor 130 is transmitted to the driven gear 191, the intermediate shaft 192, the driving gear 193 and the output gear 194 in sequence through the gears, and then output to the differential 110 through the output gear 194. That is to say, when the drive system 10 is in the second parallel hybrid mode, the power transmission process between the engine 100 and the second motor 130 is as follows: Engine 100 →first sun gear 141 →first planetary carrier 142 →driven gear 191 →intermediate shaft 192 →drive gear 193 →output gear 194 →differential 110 .

[0058] Second motor 130 → gear → driven gear 191 → intermediate shaft 192 → driving gear 193 → output gear 194 → differential 110 .

[0059] It should be noted that the engine 100 is in the 2nd gear.

[0060] In addition, the first engine 100 can be in a follow-up state or in a working state. When the first engine 100 is in the follow-up state, the second motor 130 can charge the first motor 120.

[0061] In the embodiment of the present application, when the drive system 10 is in the third parallel hybrid mode: the first brake 160 and the second brake 170 are both in the disengaged state, the clutch 180 is in the engaged state, and the engine 100 and the second motor 130 are both in operation to establish the third parallel hybrid mode, see Figure 1 and Figure 6 As shown, Figure 6 In FIG. 1 , S1 represents the first sun gear 141 , S2 represents the second sun gear 151 , C1 represents the first planet carrier 142 , C2 represents the second planet carrier 152 , R1 represents the first ring gear, R2 represents the second ring gear, and OUT represents output.

[0062] It can be understood that this third parallel hybrid mode can be the mode when the engine 100 is in the third gear, that is, this operating mode can also be called the parallel hybrid mode third gear. In this operating mode, the first brake 160 is disengaged, the second brake 170 is disengaged, and the clutch 180 is engaged. At this time, the first ring gear 143 and the second planetary carrier 152 are fixedly connected to the second sun gear 151; the power of the engine 100 is transmitted to the first planetary carrier 142 through the first sun gear 141, and then output to the differential 110 through the driven gear 191, the intermediate shaft 192, the driving gear 193 and the output gear 194. The power of the second motor 130 is transmitted to the driven gear 191, the intermediate shaft 192, the driving gear 193 and the output gear 194 in sequence through the gears, and then output to the differential 110 through the output gear 194. That is to say, when the drive system 10 is in the third parallel hybrid mode, the power transmission process of the engine 100 and the second motor 130 is as follows: Engine 100 →first sun gear 141 →first planetary carrier 142 →driven gear 191 →intermediate shaft 192 →drive gear 193 →output gear 194 →differential 110 .

[0063] Second motor 130 → gear → driven gear 191 → intermediate shaft 192 → driving gear 193 → output gear 194 → differential 110 .

[0064] It should be noted that, since the engine 100 is in the third gear, the speed from the engine 100 to the wheels is relatively small.

[0065] In addition, the first engine 100 can be in a follow-up state or in a working state. When the first engine 100 is in the follow-up state, the second motor 130 can charge the first motor 120.

[0066] The above-mentioned various modes are shown in the table below:

[0067] The drive system 10 adopts the above structure and has the following advantages: First, the drive system 10 has multiple operating modes including a pure electric mode, a power split mode, a first parallel hybrid mode, a second parallel hybrid mode, and a third parallel hybrid mode, and can achieve good power and economy under different working conditions.

[0068] Second, the first brake 160 and the clutch 180 are stacked and share a common input hub, resulting in a high degree of integration and a compact structure.

[0069] Third, during the switching process between different working modes, the second motor 130 participates in the driving, and there is no power interruption.

[0070] Fourth, this hybrid power coupling system can be applied to hybrid electric vehicle (HEV) and plug-in hybrid electric vehicle (PHEV) models, and has good platformization.

[0071] Example 2 The second embodiment of the present application provides a vehicle, which includes a controller and a driving system 10 described in any of the first embodiment, such as Figure 1 As shown, the engine 100 , the first motor 120 , and the second motor 130 are connected to and controlled by the controller.

[0072] In the description of this specification, the reference terms "some embodiments", "exemplarily", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0073] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and description of the present application should fall within the scope of the patent application.

Claims

1. A drive system comprising an engine and a differential, characterized in that: The drive system further includes a first motor, a second motor, a first planetary gear, a second planetary gear, a first brake, a second brake, a clutch, and an intermediate shaft transmission assembly, wherein the intermediate shaft transmission assembly is connected to the differential; The first planetary gear comprises a first sun gear, a first planet carrier and a first inner ring gear, the first sun gear is connected to the engine, the first planet carrier is provided with a plurality of first planetary gears, the first planetary gears are respectively engaged with the first inner ring gear and the first sun gear, and the first planet carrier is connected to the intermediate shaft transmission assembly; The second planetary gear comprises a second sun gear, a second planet carrier, and a second inner ring gear. The second planet carrier is provided with a plurality of second planetary gears, and the second planetary gears are respectively engaged with the second inner ring gear and the second sun gear. The second planet carrier is connected to the first brake and the clutch, and the second inner ring gear is connected to the first planet carrier. The first motor is connected to the second sun gear, the second brake and the clutch; The second motor is connected to the differential through the intermediate shaft transmission assembly; The first brake and the second brake are coaxially arranged, and the second brake is arranged on a side of the first brake close to the first motor.

2. The drive system according to claim 1, characterized in that The clutch and the first brake are sequentially arranged in a radial direction, and the first brake is arranged on an outer hub side of the clutch.

3. The drive system according to claim 1, characterized in that The outer hub of the first brake and the outer hub of the second brake are both fixed to the housing.

4. The drive system according to claim 1, characterized in that The second planet carrier is connected to the inner hub of the first brake, and the second planet carrier is connected to the outer hub of the clutch.

5. The drive system according to claim 1, characterized in that: The intermediate shaft transmission assembly includes a driven gear, an intermediate shaft, a driving gear and an output gear, the driven gear is connected to the driving gear through the intermediate shaft, and the driving gear is connected to the differential through the output gear; Wherein, the driven gear is connected to the second motor and the first planetary carrier respectively.

6. The drive system according to claim 5, characterized in that: The drive system has a pure electric mode, a power split mode, a first parallel hybrid mode, a second parallel hybrid mode, and a third parallel hybrid mode; When in the pure electric mode, the first brake, the second brake, and the clutch are all in a disengaged state, the engine and the first motor are not operating, and the second motor is operating; When in the power split mode, the first brake, the second brake, and the clutch are all in a disengaged state, and the engine, the first motor, and the second motor are all in operation; When in the first parallel hybrid mode, the first brake is in an engaged state, the second brake and the clutch are both in a disengaged state, and the engine and the second motor are both operating; When in the second parallel hybrid mode, the first brake and the clutch are both in a disengaged state, the second brake is in an engaged state, and the engine and the second motor are both in operation; When in the third parallel hybrid mode, the first brake and the second brake are both in a disengaged state, the clutch is in an engaged state, and the engine and the second motor are both operating.

7. The drive system according to claim 6, characterized in that: When in the power split mode, the second motor is in a power generation state, and the first motor receives the electric energy transmitted by the second motor to be driven.

8. The drive system according to claim 6, characterized in that When in the first parallel hybrid mode, the first ring gear and the second planet carrier are locked, the power of the engine is transmitted to the first planet carrier through the first sun gear, and the first planet carrier outputs the power to the differential through the intermediate shaft transmission assembly.

9. The drive system according to claim 6, characterized in that When in the third parallel hybrid mode, the first ring gear, the second planet carrier, and the second sun gear are fixedly connected; the power of the engine is transmitted to the first planet carrier through the first sun gear, and the first planet carrier outputs the power to the differential through the intermediate shaft transmission assembly.

10. A vehicle, characterized in that: The drive system comprises a controller and any one of claims 1 to 9, wherein the engine, the first motor and the second motor are connected to and controlled by the controller.

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