Automotive drive system

Abstract

The application discloses an automobile driving system, which comprises a driving shell assembly, a controller assembly and a transmission assembly, wherein the transmission assembly comprises an engine, a generator, a driving motor and a speed reducer; the driving shell assembly comprises a main shell, a front end cover, a rear end cover and an upper cover; the main shell comprises a controller cavity, a gear cavity, a driving motor cavity and a generator cavity; the driving motor cavity and the generator cavity are located on the same side; the gear cavity is located on the opposite side of the driving motor cavity and the generator cavity; the controller cavity is located above the generator cavity and the gear cavity; the upper cover covers the controller cavity; the rear end cover covers the rear side of the driving motor cavity and the generator cavity; the speed reducer is installed in the gear cavity; the front end cover covers the front side of the gear cavity; the engine is located outside the driving shell assembly; and the engine input shaft penetrates into the front end cover and is connected with the speed reducer. The automobile driving system is highly integrated, the overall structure is compact, and the automobile driving system occupies a small space.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, in particular to an automobile driving system. BACKGROUND

[0002] The existing hybrid automobile driving system generally includes a control module, an engine, a driving motor, a generator and a reducer, etc. Among them, the control module is the brain of the hybrid automobile, responsible for monitoring and coordinating the work of each component to ensure the efficient and smooth operation of the system. The control module adjusts the power output in real time according to the driving conditions, battery status, engine and motor performance, etc. The engine is a main power source of the hybrid automobile, and the engine is responsible for burning fuel to generate power. In some hybrid systems, the generator is driven by the engine to generate electricity to charge the battery or directly provide power to the driving motor. The driving motor uses electricity to drive the vehicle, and in hybrid automobiles, it usually works with the engine to provide additional power or completely replace the engine for driving. The reducer is usually located between the driving motor and the wheels to reduce the speed of the motor and increase the torque to drive the vehicle more efficiently.

[0003] With the development of hybrid automobiles, the integration of the driving system is increasingly required, hoping to make the vehicle structure more compact through high integration, so as to improve fuel efficiency and performance; and simplify the production and assembly process, reduce manufacturing cost. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art and provide a highly integrated automobile driving system.

[0005] The technical scheme of the present application provides an automobile driving system, which comprises a driving shell assembly, a controller assembly and a transmission assembly, wherein the transmission assembly comprises an engine, a generator, a driving motor and a reducer;

[0006] The driving shell assembly comprises a main shell, a front end cover, a rear end cover and an upper cover, the main shell comprises a controller cavity, a gear cavity, a driving motor cavity and a generator cavity, the driving motor cavity and the generator cavity are located on the same side, the gear cavity is located on the opposite side of the driving motor cavity and the generator cavity, and the controller cavity is located above the generator cavity and the gear cavity;

[0007] The controller assembly is installed in the controller cavity, and the upper cover covers the controller cavity;

[0008] The driving motor is installed in the driving motor cavity, the generator is installed in the generator cavity, and the rear end cover covers the rear side of the driving motor cavity and the generator cavity;

[0009] The reducer is installed in the gear cavity, and the front end cover covers the front side of the gear cavity;

[0010] The engine is located outside the drive housing assembly, and the engine input shaft passes through the front cover and is connected to the reducer.

[0011] Furthermore, the transmission assembly also includes a speed increaser, an electromagnetic clutch, and a direct drive gear. The speed increaser includes a speed increase bearing, a first speed increase gear, and a second speed increase gear. The speed increase bearing and the first speed increase gear are coaxially connected to the generator. The second speed increase gear is coaxially connected to the engine input shaft, the electromagnetic clutch, and the direct drive gear. The first speed increase gear meshes with the second speed increase gear.

[0012] Furthermore, an oil pump, an oil cooler, and a switching solenoid valve are installed in the main housing. The oil pump pumps oil into the oil cooler, and the oil cooler cools the oil.

[0013] The main housing also includes a distribution oil chamber, which is disposed in the main housing. The oil cooler delivers cooled oil to the distribution oil chamber. The distribution oil chamber includes a first oil chamber and a second oil chamber. The first oil chamber is connected to the drive motor chamber, and the second oil chamber is connected to the generator chamber.

[0014] The solenoid valve is located between the first oil chamber and the second oil chamber. When the solenoid valve is opened, the oil flows from the first oil chamber into the second oil chamber.

[0015] Furthermore, it also includes a drive motor oil circuit, a reduction system oil circuit, a generator oil circuit, and a speed-increasing system oil circuit. The first oil chamber is connected to the drive motor oil circuit and the reduction system oil circuit, and the second oil chamber is connected to the generator oil circuit and the speed-increasing system oil circuit.

[0016] Furthermore, the controller assembly, from top to bottom, includes a domain control board, a PDM, a capacitor, a drive motor drive board, a drive motor IGBT, an integrated water channel, a generator IGBT, and a drive control integrated board;

[0017] The capacitor and the integrated water channel are arranged side by side below the PDM, the drive motor IGBT is located above the integrated water channel, and the generator IGBT is located below the integrated water channel;

[0018] The drive motor drive board is located between the drive motor IGBT and the PDM, and the drive control integrated board is located below the generator IGBT and the capacitor.

[0019] Furthermore, the upper cover includes a small cover and a large cover, the domain control board is disposed between the small cover and the large cover, the small cover is located above the domain control board, and the large cover is located above the PDM.

[0020] Furthermore, the main housing is provided with a water-cooled inlet pipe and a water-cooled outlet pipe;

[0021] The PDM includes a PDM water channel, which is connected in series with the integrated water channel. The water-cooled inlet pipe and the water-cooled outlet pipe are connected to the PDM water channel.

[0022] Furthermore, the PDM water channel includes a capacitor cooling unit and a PDM cooling unit, which are connected in series.

[0023] Furthermore, the PDM is provided with a housing water inlet, a housing water outlet, an integrated water channel inlet, and an integrated water channel outlet. The water-cooled water inlet pipe is connected to the housing water inlet, the integrated water channel inlet is connected to the inlet of the integrated water channel, the integrated water channel outlet is connected to the outlet of the integrated water channel, and the housing water outlet is connected to the water-cooled water outlet pipe.

[0024] Furthermore, the integrated water channel includes an upper water channel and a lower water channel, wherein the upper water channel is used to cool the drive motor IGBT, and the lower water channel is used to cool the generator IGBT.

[0025] The above technical solution has the following beneficial effects:

[0026] This invention achieves a high degree of integration of the engine, generator, drive motor, reducer, controller and drive unit assembly, making the overall structure of the vehicle drive system compact and space-saving. Attached Figure Description

[0027] The disclosure of this invention will become more readily understood by referring to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings:

[0028] Figure 1 This is a perspective view of an automobile drive system according to an embodiment of the present invention;

[0029] Figure 2 This is a rear view of the vehicle drive system in one embodiment of the present invention, omitting the rear end cover;

[0030] Figure 3 This is a perspective view of the vehicle drive system in one embodiment of the present invention, omitting the rear end cover;

[0031] Figure 4This is a perspective view of an embodiment of the automobile drive system with part of the front cover omitted;

[0032] Figure 5 This is a perspective view of the transmission assembly in one embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the oil circuit system of an automobile drive system according to an embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the oil flow direction through the first oil cavity in the main shell in one embodiment of the present invention;

[0035] Figure 8 This is a partial enlarged view of the oil distribution cavity in one embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram of the inner side of the rear end cover in one embodiment of the present invention;

[0037] Figure 10 This is a schematic diagram of the outer side of the rear end cover in one embodiment of the present invention;

[0038] Figure 11 This is a perspective view of the rear end cover in one embodiment of the present invention;

[0039] Figure 12 This is a cross-sectional view of a drive motor according to an embodiment of the present invention;

[0040] Figure 13 This is a schematic diagram of the stator cooling branch of the drive motor in one embodiment of the present invention;

[0041] Figure 14 This is a partially enlarged view of the drive motor cavity in one embodiment of the present invention;

[0042] Figure 15 This is a schematic diagram of the gear cavity in one embodiment of the present invention;

[0043] Figure 16 This is a schematic diagram of the inner side of the front cover in one embodiment of the present invention;

[0044] Figure 17 This is a schematic diagram of the outer side of the front cover in one embodiment of the present invention;

[0045] Figure 18 This is a partial enlarged view of the bearing groove of the drive motor in one embodiment of the present invention;

[0046] Figure 19 This is a perspective view of the front cover in one embodiment of the present invention;

[0047] Figure 20 This is a schematic diagram of the sixth and seventh oil passages in one embodiment of the present invention;

[0048] Figure 21 This is a partial enlarged view of the differential bearing groove in one embodiment of the present invention;

[0049] Figure 22 This is a schematic diagram of the oil flow direction through the second oil cavity in the main shell in one embodiment of the present invention;

[0050] Figure 23 This is a schematic diagram of the generator oil circuit in one embodiment of the present invention;

[0051] Figure 24 This is a schematic diagram of the eighth oil passage located in the second annular oil passage in one embodiment of the present invention;

[0052] Figure 25 This is a schematic diagram of the eighth oil passage located in the main casing in one embodiment of the present invention;

[0053] Figure 26 This is a schematic diagram of the eighth oil passage located in the gear cavity in one embodiment of the present invention;

[0054] Figure 27 This is a schematic diagram of the oil pipe in the gear cavity in one embodiment of the present invention;

[0055] Figure 28 This is a schematic diagram of the ninth oil passage in the main casing in one embodiment of the present invention;

[0056] Figure 29 This is a schematic diagram of the ninth oil passage in the engine input bearing mounting position in one embodiment of the present invention;

[0057] Figure 30 This is a cross-sectional view of the engine input shaft in one embodiment of the present invention. Figure 1 ;

[0058] Figure 31 This is a cross-sectional view of the engine input shaft in one embodiment of the present invention. Figure 2 ;

[0059] Figure 32 This is an exploded view of an automobile drive system according to an embodiment of the present invention;

[0060] Figure 33 This is a perspective view of the controller assembly in one embodiment of the present invention;

[0061] Figure 34 yes Figure 33 Exploded view;

[0062] Figure 35 This is a top view of the main housing in one embodiment of the present invention;

[0063] Figure 36 This is a cross-section of the PDM in one embodiment of the present invention.Figure 1 ;

[0064] Figure 37 This is a cross-section of the PDM in one embodiment of the present invention. Figure 2 ;

[0065] Figure 38 This is a perspective view of an integrated waterway according to an embodiment of the present invention;

[0066] Figure 39 This is a longitudinal sectional view of the integrated waterway in one embodiment of the present invention;

[0067] Figure 40 This is a schematic diagram of the cooling circuit in the PDM, integrated water channel, and main housing in one embodiment of the present invention;

[0068] Figure 41 This is an exploded view of the drive assembly in another embodiment of the present invention;

[0069] Figure 42 This is a schematic diagram of the capacitor, integrated water channel, and inverter three-phase terminal block in another embodiment of the present invention.

[0070] Appendix Label Reference Table:

[0071] Drive motor 10, generator 20, reducer 30, speed increaser 40, first hollow channel 101, intermediate shaft system 301, differential 302, speed increase bearing 401, speed increase gear 402, engine input shaft 501, electromagnetic clutch 502, needle roller bearing 503, direct drive gear 504, second hollow channel 505, first branch oil passage 5051, second branch oil passage 5052;

[0072] Oil pump 1, oil cooler 2;

[0073] Drive housing assembly 70:

[0074] Main housing 3: oil distribution chamber 31, drive motor chamber 32, generator chamber 33, gear chamber 34, third oil passage 35, ninth oil passage 36, controller chamber 37, water-cooled inlet pipe 38, water-cooled outlet pipe 39, first oil chamber 311, second oil chamber 312, second oil hole 321, first annular oil passage 322, third oil hole 331, second annular oil passage 332, eighth oil passage 333, notch 340, drive motor input bearing mounting position 341, intermediate bearing mounting position 342, differential bearing mounting position 343, engine input bearing mounting position 344, generator bearing mounting position 345, drive motor return oil groove 346, oil baffle slope 347, second arc-shaped flange 348, second boss 349;

[0075] Front cover 4: Differential bearing groove 41, drive motor bearing groove 42, intermediate bearing groove 43, engine input bearing groove 44, fourth oil passage 45, fifth oil passage 46, sixth oil passage 47, seventh oil passage 48, first arc-shaped flange 49, bearing lubrication guide groove 471, first boss 490.

[0076] Rear end cover 5: First oil hole 51, first oil passage 52, second oil passage 53, drive motor cover 54, generator cover 55;

[0077] 6. Solenoid valve; 7. Oil pipe;

[0078] Top cover 9: Small cover 91, Large cover 92;

[0079] Controller assembly 60:

[0080] Domain controller board 61: Cable 611;

[0081] PDM62: Capacitor cooling unit 621, PDM cooling unit 622, housing inlet 623, housing outlet 624, integrated water channel inlet 625, integrated water channel outlet 626;

[0082] Capacitor 63: Shielding plate 631;

[0083] Drive motor drive board 64: Drive motor three-phase terminal block 641;

[0084] Drive motor IGBT65;

[0085] Integrated water channels 66: upper water channel 661, lower water channel 662, water channel inlet 663, water channel outlet 664, upper inverter three-phase terminal block 665, lower inverter three-phase terminal block 666;

[0086] Generator IGBT67;

[0087] Drive control integrated board 68: Generator three-phase terminal block 681; Detailed Implementation

[0088] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0089] It is readily understood that, based on the technical solution of this invention, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of the invention.

[0090] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0091] In some embodiments of the present invention, such as Figures 1-5 As shown, the vehicle drive system includes a drive housing assembly 70, a controller assembly 60, and a transmission assembly, which includes an engine, a generator 20, a drive motor 10, and a reducer 30.

[0092] The drive housing assembly 70 includes a main housing 3, a front end cover 4, a rear end cover 5, and an upper cover 9. The main housing 3 includes a controller cavity 37, a gear cavity 34, a drive motor cavity 32, and a generator cavity 33. The drive motor cavity 32 and the generator cavity 33 are located on the same side, the gear cavity 34 is located on the opposite side of the drive motor cavity 32 and the generator cavity 33, and the controller cavity 37 is located above the generator cavity 33 and the gear cavity 34.

[0093] The controller assembly 60 is installed in the controller cavity 37, and the upper cover 9 covers the top of the controller cavity 37;

[0094] The drive motor 10 is installed in the drive motor cavity 32, the generator 20 is installed in the generator cavity 33, and the rear end cover 5 covers the rear side of the drive motor cavity 32 and the generator cavity 33.

[0095] The reducer 30 is installed in the gear cavity 34, and the front cover 4 covers the front side of the gear cavity 34;

[0096] The engine is located outside the drive housing assembly 70, and the engine input shaft 501 passes through the front cover 4 and is connected to the reducer 30.

[0097] Specifically, such as Figure 5 As shown, the transmission mechanism of the drive assembly includes a drive motor 10 (see...) Figure 2 ), generator 20, reducer 30 and speed increaser 40. Figure 5 The drive motor 10 is omitted from the text. The drive motor 10 is actually connected to the reducer 30, and the generator 20 is connected to the speed increaser 40. The reducer 30 includes an intermediate shaft system 301 and a differential 302. The drive motor 10 transmits power to the differential 302 via the intermediate shaft system 301. The differential 302 is used to connect to external wheel axles, transmitting power to them.

[0098] like Figure 1 As shown, the rear end cover 5 is used to cover the rear side of the main housing 3. Figures 2-3As shown, the rear side of the main housing 3 includes a drive motor cavity 32 and a generator cavity 33. The drive motor cavity 32 is used to install the drive motor 10, and the generator cavity 33 is used to install the generator 20.

[0099] Figure 4 The middle image is a partial sectional view of the front cover 4, revealing part of the gear cavity 34. (See image below.) Figure 15 As shown, the front side of the main housing 3 includes a gear cavity 34, which is used to mount the reducer 30 and the speed increaser 40. Figure 16 As shown, the front cover 4 is used to cover the front side of the main housing 3.

[0100] In this embodiment, the high integration of the engine, generator, drive motor, reducer, controller and driver assembly is achieved by setting up the drive housing assembly, making the overall structure of the vehicle drive system compact and occupying little space.

[0101] Furthermore, the transmission assembly also includes a speed increaser 40, an electromagnetic clutch 502, and a direct drive gear 504. The speed increaser 40 includes a speed increase bearing 401, a first speed increase gear, and a second speed increase gear. The speed increase bearing 401 and the first speed increase gear are coaxially connected to the generator, and the second speed increase gear is coaxially connected to the engine input shaft 501, the electromagnetic clutch 502, and the direct drive gear 504. The first speed increase gear meshes with the second speed increase gear.

[0102] Specifically, such as Figure 5 As shown, the speed increaser 40 includes a speed increase bearing 401 and a speed increase gear 402. The speed increase bearing 401 and one speed increase gear 402 are coaxially connected to the generator 20, while the other speed increase gear 402 is coaxially connected to the engine input shaft 501, the electromagnetic clutch 502, and the direct drive gear 504. The two speed increase gears 402 mesh. The engine (not shown) can drive the generator 20 to generate electricity via the engine input shaft 501 and the speed increase gear 402. Additionally, the direct drive gear 504 is connected to the intermediate shaft system 301, allowing the engine to directly drive the wheel axles via the engine input shaft 501, the direct drive gear 504, the intermediate shaft system 301, and the differential 302.

[0103] Furthermore, an oil pump 1, an oil cooler 2, and a switching solenoid valve 6 are installed in the main housing. The oil pump 1 pumps oil into the oil cooler 2, and the oil cooler 2 cools the oil.

[0104] The main housing 3 also includes an oil distribution chamber 31, which is disposed in the main housing 3. The oil cooler 2 delivers the cooled oil to the oil distribution chamber 31. The oil distribution chamber 31 includes a first oil chamber 311 and a second oil chamber 312. The first oil chamber 311 is connected to the drive motor chamber 32, and the second oil chamber 312 is connected to the generator chamber 33.

[0105] The solenoid valve 6 is located between the first oil chamber 311 and the second oil chamber 312. When the solenoid valve 6 is opened, the oil flows from the first oil chamber 311 into the second oil chamber 312.

[0106] Furthermore, it also includes a drive motor oil circuit, a reduction system oil circuit, a generator oil circuit, and a speed-increasing system oil circuit. The first oil chamber 311 is connected to the drive motor oil circuit and the reduction system oil circuit, and the second oil chamber 312 is connected to the generator oil circuit and the speed-increasing system oil circuit.

[0107] Specifically, such as Figure 1 As shown, the drive assembly includes a main housing 3 and a rear end cover 5, which is located on the rear side of the main housing 3. An oil pump 1 and an oil cooler 2 are mounted on the main housing 3. The oil pump 1 is used to pump oil into the oil cooler 2, and the oil cooler 2 is used to cool the oil. The oil cooler 2 exchanges heat through water cooling.

[0108] like Figure 2 As shown, Figure 2 The rear end cover 5 is omitted. The main housing 3 has an oil distribution chamber 31, which is connected to an oil cooler 2. The oil cooler 2 delivers oil to the oil distribution chamber 31. The oil distribution chamber 31 includes a first oil chamber 311 and a second oil chamber 312. The first oil chamber 311 connects to the drive motor oil circuit and the reduction system oil circuit. Figure 2 The drive motor 10 is located on the right side of the first oil chamber 311. The drive motor oil circuit is located in the drive motor chamber 32 of the main housing 3, and the reduction system oil circuit is located in the gear chamber 34 on the front side of the main housing 3 (see...). Figure 15 The second oil chamber 312 connects the generator oil circuit and the speed-increasing system oil circuit. Figure 2 The intermediate generator 20 is located on the left side of the second oil chamber 312. The generator oil circuit is located in the generator chamber 33 of the main housing 3, and the speed-increasing system oil circuit is located in the gear chamber 34 on the front side of the main housing 3 (see...). Figure 15 )middle.

[0109] The first oil chamber 311 is not controlled by the switching solenoid valve 6. The first oil chamber 311 maintains continuous cooling and lubrication of the drive motor oil circuit and the reduction system oil circuit. Figure 7 and Figure 8 As shown, the black arrows indicate the direction of oil flow. The oil is pumped from the oil pump 1 into the oil cooler 2, then from the oil cooler 2 into the first oil chamber 311, and then from the first oil chamber 311 into the drive motor oil circuit and the reduction system oil circuit.

[0110] like Figure 22 As shown, the black arrows indicate the direction of oil flow. The oil is pumped from the oil pump 1 into the oil cooler 2, then from the oil cooler 2 into the second oil chamber 312, and then from the second oil chamber 312 into the generator oil circuit and the speed-up system oil circuit.

[0111] like Figure 2 As shown, a switching solenoid valve 6 is installed between the first oil chamber 311 and the second oil chamber 312. The switching solenoid valve 6 is used to control the on / off state between the first oil chamber 311 and the second oil chamber 312.

[0112] like Figure 6 As shown, the control current is used to control the opening and closing of the solenoid valve 6. When the solenoid valve 6 is open, oil flows from the first oil chamber 311 into the second oil chamber 312, and then into the generator oil circuit and the speed increaser system oil circuit to cool the stator of the generator 20 and the speed increaser 40. When the solenoid valve 6 is closed, the oil circuit between the first oil chamber 311 and the second oil chamber 312 is disconnected, and oil does not enter the generator oil circuit and the speed increaser system oil circuit. The closing of the solenoid valve 6 is usually in the pure electric mode of the vehicle. At this time, the generator 20 does not work, and the cooling and lubrication of the generator oil circuit and the speed increaser system oil circuit are stopped, reducing the flow resistance of the oil circuit system, reducing the working power of the oil pump, and improving the working efficiency of the lubrication and cooling system.

[0113] Furthermore, such as Figures 9-12 As shown, the drive motor oil circuit includes a drive motor rotor cooling branch, which includes a first oil hole 51, a first oil passage 52, and a second oil passage 53. The first oil hole 51, the first oil passage 52, and the second oil passage 53 are all located on the rear end cover 5. The first oil hole 51 is connected to the first oil cavity 311. One end of the first oil passage 52 is connected to the first oil hole 51. One end of the second oil passage 53 is connected to the first oil passage 52, and the other end is connected to the first hollow channel 101 of the rotor shaft of the drive motor 10.

[0114] Specifically, such as Figure 9 As shown, the rear end cover 5 includes a drive motor cover 54 and a generator cover 55. The drive motor cover 54 covers the outside of the drive motor 10 and is arranged concentrically with the drive motor 10. The generator cover 55 covers the outside of the generator 20 and is arranged concentrically with the generator 20. A first oil hole 51 is provided on the inner side of the rear end cover 5, and the first oil hole 51 communicates with the first oil chamber 311.

[0115] like Figure 10 As shown, both the first oil passage 52 and the second oil passage 53 are located inside the rear end cover 5. The first oil hole 51 is directly connected to one end of the first oil passage 52, the first oil passage 52 extends downward at an angle, and the other end of the first oil passage 52 is blocked. Figure 9 As shown, the lower end of the second oil passage 53 is connected to the first oil passage 52, and the upper end is connected to the center of the drive motor cover 54. The center of the drive motor cover 54 corresponds exactly to the rotor shaft of the drive motor 10.

[0116] like Figure 12As shown, the upper end of the second oil passage 53 is connected to the first hollow channel 101 of the rotor shaft of the drive motor 10, enabling oil to be carried into the rotor shaft of the drive motor 10. The rotor shaft has multiple radial oil holes (not shown). When the rotor shaft rotates, oil enters from the first hollow channel 101 into the radial oil holes, and then enters the rotor from the radial oil holes to cool the rotor. When the rotor rotates, it throws the oil towards the stator windings to cool them. The oil at the stator windings drips onto the rear bearing of the motor, lubricating the rear bearing. Figure 10 The black arrows in the diagram indicate the flow path of the oil.

[0117] Furthermore, such as Figure 13 As shown, the drive motor oil circuit also includes a drive motor stator cooling branch. The drive motor stator cooling branch includes a second oil hole 321 and a first annular oil channel 322. The second oil hole 321 connects the first oil cavity 311 and the first annular oil channel 322. The first annular oil channel 322 is arranged around the inner wall of the drive motor cavity 32.

[0118] The second oil hole 321 and the first annular oil channel 322 are both located inside the main housing 3. The second oil hole 321 connects the first oil cavity 311 and the first annular oil channel 322. The first annular oil channel 322 is a groove formed around the entire inner wall of the drive motor cavity 32. Oil flows from the first oil cavity 311 into the second oil hole 321, then from the second oil hole 321 into the first annular oil channel 322, and then flows around the entire inner wall of the drive motor cavity 32. The first annular oil channel 322 corresponds to the stator of the drive motor 10, so the oil flows into the stator of the drive motor 10 to cool it.

[0119] Therefore, the rotor and stator of the drive motor 10 are cooled by the rotor cooling branch and the stator cooling branch of the drive motor.

[0120] Furthermore, such as Figures 14-17 As shown, the front cover 4 includes a differential bearing groove 41, a drive motor bearing groove 42, an intermediate bearing groove 43, and an engine input bearing groove 44.

[0121] The deceleration system oil circuit includes a third oil passage 35, a fourth oil passage 45, a fifth oil passage 46, and a sixth oil passage 47. The third oil passage 35 is located in the main housing 3. One end of the third oil passage 35 is connected to the first annular oil passage 322 and extends into the gear cavity 34. The fourth oil passage 45, the fifth oil passage 46, and the sixth oil passage 47 are all arranged in the front end cover 4. The other end of the third oil passage 35 is directly connected to the fourth oil passage 45 and the fifth oil passage 46. The fourth oil passage 45 leads into the differential bearing groove 41, the fifth oil passage 46 leads into the drive motor bearing groove 42, and one end of the sixth oil passage 47 is connected to the fifth oil passage 46, while the other end leads into the engine input bearing groove 44.

[0122] Specifically, such as Figure 14 As shown, one end of the third oil passage 35 is disposed in the first annular oil passage 322, and the oil in the first annular oil passage 322 can flow into the third oil passage 35.

[0123] like Figure 15 As shown, the third oil passage 35 passes through the drive motor cavity 32, and the other end of the third oil passage 35 extends to the edge of the gear cavity 34 on the front side of the main housing 3.

[0124] like Figure 16 As shown, one end of the fourth oil passage 45 is located on the inner side of the front cover 4 and is directly connected to the other end of the third oil passage 35.

[0125] like Figure 17 As shown, the fourth oil passage 45, the fifth oil passage 46, and the sixth oil passage 47 are all located inside the front cover 4. One end of the fourth oil passage 45 overlaps with one end of the fifth oil passage 46, so the other end of the third oil passage 35 is directly connected to the fourth oil passage 45 and the fifth oil passage 46, and the fifth oil passage 46 is connected to the sixth oil passage 47. Specifically, the fourth oil passage 45 leads to the differential bearing groove 41, the fifth oil passage 46 leads to the drive motor bearing groove 42, and the sixth oil passage 47 leads to the engine input bearing groove 44. Figure 15 The black arrows indicate the direction of oil flow. The fourth oil passage 45, the fifth oil passage 46, and the sixth oil passage 47 are actually located inside the front cover 4. Only a portion of their outlines can be seen from the outer side of the front cover 4.

[0126] like Figure 19 As shown, the inner side of the front cover 4 is provided with a differential bearing groove 41, a drive motor bearing groove 42, an intermediate bearing groove 43 and an engine input bearing groove 44.

[0127] like Figure 18 As shown, the other end of the fifth oil passage 46 leads to the drive motor bearing groove 42, which can cool the bearing of the drive motor 10.

[0128] like Figure 20 As shown, the other end of the sixth oil passage 47 leads into the engine input bearing groove 44, which can cool the bearing of the engine input shaft 501. In addition, the oil outlet on the engine input bearing groove 44 of the sixth oil passage 47 is located in the upper right region, so that the oil can be sprayed to the left to cool the left half of the coil of the electromagnetic clutch 502, and can also be cooled to the right along the surface of the coil under the action of gravity.

[0129] like Figure 20 As shown, the sixth oil passage 47 is provided with a bearing lubrication guide groove 471 in a radially downward direction, which can guide oil to the bearing for lubrication.

[0130] likeFigure 21 As shown, the other end of the fourth oil passage 45 leads into the differential bearing groove 41, which can cool the bearings of the transmission 30.

[0131] Furthermore, such as Figure 19 and Figure 20 As shown, the deceleration system oil circuit also includes a seventh oil passage 48, which connects the drive motor bearing groove 42 and the intermediate bearing groove 43. The drive motor bearing groove 42 is located above the intermediate bearing groove 43.

[0132] Specifically, such as Figure 19 As shown, one end of the seventh oil passage 48 is located at the lower part of the drive motor bearing groove 42.

[0133] like Figure 20 As shown, the seventh oil passage 48 connects the drive motor bearing groove 42 and the intermediate bearing groove 43, with the other end of the seventh oil passage 48 leading into the intermediate bearing groove 43. This allows oil from the drive motor bearing groove 42 to be directed into the intermediate bearing groove 43, thus cooling the bearings of the intermediate shaft system 301.

[0134] Therefore, the arrangement of the oil circuit in the deceleration system can cool and lubricate the various bearings installed on the front cover 4.

[0135] Furthermore, such as Figures 22-23 As shown, the generator oil circuit includes a third oil hole 331 and a second annular oil passage 332. The third oil hole 331 connects the second oil cavity 312 and the second annular oil passage 332. The second annular oil passage 332 is arranged around the inner wall of the generator cavity 33.

[0136] Specifically, Figure 22 The black arrows indicate the direction of oil flow. The oil flows from the oil pump 1 into the oil cooler 2, and then from the oil cooler 2 into the first oil chamber 311. When the solenoid valve 6 is opened, the oil flows from the first oil chamber 311 into the second oil chamber 312.

[0137] like Figure 23 As shown, the third oil hole 331 connects the second oil cavity 312 and the second annular oil passage 332. The second annular oil passage 332 is a ring-shaped groove that runs around the inner wall of the generator cavity 33. The second annular oil passage 332 corresponds to the stator of the generator 20. Therefore, oil flows from the second annular oil passage 332 to the stator of the generator 20 to cool the stator.

[0138] Furthermore, such as Figures 24-27As shown, the gear cavity 34 includes a drive motor input bearing mounting position 341, an intermediate bearing mounting position 342, a differential bearing mounting position 343, an engine input bearing mounting position 344, and a generator bearing mounting position 345. A speed-increasing bearing 401 is installed at the generator bearing mounting position 345, and speed-increasing gears 402 are installed on the generator bearing mounting position 345 and the engine input bearing mounting position 344.

[0139] The speed-up system oil circuit includes an eighth oil passage 333 and an oil pipe 7. One end of the eighth oil passage 333 is connected to the second annular oil passage 332. The eighth oil passage 333 extends from the generator cavity 33 to the gear cavity 34. The other end of the eighth oil passage 333 is located above the engine input bearing mounting position 344 and is connected to the oil pipe 7. The oil pipe 7 is provided with multiple oil injection holes, which spray oil onto the gear surface of the speed-up gear 402 and the speed-up bearing 401.

[0140] Specifically, such as Figure 24 As shown, one end of the eighth oil passage 333 is connected to the second annular oil passage 332.

[0141] like Figure 25 As shown, the eighth oil passage 333 extends from the generator cavity 33 into the gear cavity 34.

[0142] like Figure 26 As shown, the other end of the eighth oil passage 333 extends out from the generator cavity 33 and is located above the engine input bearing mounting position 344.

[0143] Figure 26 The intermediate gear cavity 34 includes a drive motor input bearing mounting position 341, an intermediate bearing mounting position 342, a differential bearing mounting position 343, an engine input bearing mounting position 344, and a generator bearing mounting position 345. A speed-increasing bearing 401 is installed at the generator bearing mounting position 345, and speed-increasing gears 402 are installed on the generator bearing mounting position 345 and the engine input bearing mounting position 344.

[0144] like Figure 5 As shown, the speed-increasing bearing 401 at the generator bearing mounting position 345 is coaxially connected to the speed-increasing gear 402, and the speed-increasing gear 402 at the generator bearing mounting position 345 meshes with the speed-increasing gear 402 on the engine input bearing mounting position 344.

[0145] like Figure 27 As shown, the other end of the eighth oil passage 333 is connected to the oil pipe 7. The oil pipe 7 has multiple oil injection holes (not shown in the figure). These holes spray oil onto the gear surface of the speed-increasing gear 402 and the speed-increasing bearing 401, providing both cooling and lubrication. Therefore, the oil circuit of the speed-increasing system can effectively cool the gears and bearings of the speed-increasing unit.

[0146] Furthermore, such as Figure 26 As shown, a drive motor oil return groove 346 is also provided on one side of the intermediate bearing mounting position 342 in the gear cavity 34. The drive motor oil return groove 346 is connected to the drive motor cavity 32. An oil-blocking inclined surface 347 is provided below the drive motor oil return groove 346, and the oil-blocking inclined surface 347 extends to the bottom of the intermediate bearing mounting position 342.

[0147] Since the drive motor oil return groove 346 is connected to the drive motor cavity 32, oil flows from the drive motor cavity 32 through the drive motor oil return groove 346 into the gear cavity 34. The oil-blocking slope 347 is a straight surface located below the drive motor oil return groove 346, extending from the side wall of the gear cavity 34 to a position close to the engine input bearing mounting position 344. Oil flows from the drive motor oil return groove 346 onto the oil-blocking slope 347. Because the oil-blocking slope 347 is located below the intermediate bearing mounting position 342, when the intermediate shaft gear mounted below the intermediate bearing mounting position 342 rotates, it agitates the oil and carries it onto the tooth surface of the intermediate shaft gear, cooling and lubricating the intermediate shaft gear.

[0148] Furthermore, such as Figure 16 and Figure 26 As shown, the bottom of the gear cavity 34 is provided with an oil reservoir, which is composed of a first arc-shaped flange 49 on the front end cover 4 and a second arc-shaped flange 348 on the gear cavity 34. The oil reservoir is connected to the oil pump 1, which can pump the oil in the oil reservoir into the oil cooler 2. The upper concave surface formed by the second arc-shaped flange 348 and the first arc-shaped flange 49 can store a portion of the transmission oil to lubricate the tooth surface of the engine direct drive gear 504.

[0149] like Figure 16 As shown, the front cover 4 also has a first protrusion 490. Figure 24 As shown, the gear cavity 34 is provided with a second boss 349. The first boss 490 and the second boss 349 are both located in the oil storage cavity to reduce the volume of the oil storage cavity. This ensures that there is a sufficient liquid level for the oil pump 1 to draw oil when the oil volume is low.

[0150] like Figure 26 As shown, the second arc-shaped flange 348 has a notch 340 at one end near the differential bearing mounting position 343. The notch 340 ensures that the oil flows into the oil reservoir and returns to the oil pump 1 to achieve circulation.

[0151] Furthermore, such as Figures 28-30As shown, it also includes an engine input shaft lubrication circuit, which includes a ninth oil passage 36. The ninth oil passage 36 is directly connected to the oil pump 1. The ninth oil passage 36 enters the engine input bearing mounting position 344 of the gear cavity 34 and is connected to the second hollow channel 505 of the engine input shaft 501.

[0152] Specifically, such as Figure 28 As shown, the main housing 3 is also provided with a ninth oil passage 36, which is directly connected to the oil pump 1, bypassing the oil cooler 2 and the distribution chamber 31. One end of the ninth oil passage 36 is located on the rear side of the main housing 3, as shown in the figure. Figure 27 As shown, the other end of the ninth oil passage 36 extends to the front side of the main housing 3 and is located at the engine input bearing mounting position 344, which corresponds to the engine input shaft 501.

[0153] like Figure 30 As shown, the ninth oil passage 36 enters the second hollow channel 505 of the engine input shaft 501 from the engine input bearing mounting position 344. Oil enters the second hollow channel 505 to lubricate the bearing mounted on the engine input shaft 501.

[0154] Since the ninth oil passage 36 bypasses the oil cooler 2 and the distribution chamber 31, and enters directly from the oil pump 1 into the second hollow passage 505, the oil is not cooled and only serves a lubricating function. Furthermore, the ninth oil passage 36 is not controlled by the on / off control valve 6, thus ensuring a continuous supply of oil lubrication.

[0155] Furthermore, such as Figure 31 As shown, the electromagnetic clutch push ring of the electromagnetic clutch 502 and the needle roller bearing 503 are installed on the engine input shaft 501. The second hollow channel 505 is provided with a first branch oil passage 5051 and a second branch oil passage 5052 along the radial direction. The first branch oil passage 5051 leads to the electromagnetic clutch push ring, and the second branch oil passage 5052 leads to the needle roller bearing 503. Therefore, the electromagnetic clutch push ring and the needle roller bearing 503 can be lubricated.

[0156] In this invention, the generator oil circuit is controlled by switching a solenoid valve. When the generator is not operating, the flow resistance of the oil circuit system is reduced, the oil pump's operating power is reduced, and the efficiency of the lubrication and cooling system is improved. This invention also cools the stator and rotor of the drive motor through the drive motor oil circuit; cools the generator stator through the generator oil circuit; lubricates the bearings of the reducer through the reduction system oil circuit; and lubricates the gears and bearings of the speed increaser through the speed increase system oil circuit. Furthermore, this invention lubricates the bearings mounted on the engine input shaft and the electromagnetic clutch push ring through a ninth oil passage.

[0157] In some embodiments of the present invention, such as Figures 32-34As shown, the controller assembly, from top to bottom, includes a domain control board 61, a PDM 62, a capacitor 63, a drive motor drive board 64, a drive motor IGBT 65, an integrated water channel 66, a generator IGBT 67, and a drive control integrated board 68.

[0158] The capacitor 63 and the integrated water channel 66 are arranged side by side below the PDM62, the drive motor IGBT65 is located above the integrated water channel 66, and the generator IGBT67 is located below the integrated water channel 66.

[0159] The drive motor drive board 64 is located between the drive motor IGBT 65 and PDM 62, and the drive control integrated board 68 is located below the generator IGBT 67 and capacitor 63.

[0160] Specifically, the domain control board 61 is located above the PDM62. The domain control board 61 integrates the vehicle control unit (VCU), high-voltage battery management system (HBMS), heat pump air conditioning control (HVAC), engine compartment thermal management system (TMS), drive motor control unit (MCU), charging protocol conversion unit (EVCC), low-voltage battery management system (LBMS), drive anti-slip system (dTCS), and high-voltage reverse pre-charge function. The domain control board 61 is connected to the drive motor drive board 64 via a ribbon cable 611.

[0161] As part of the electric vehicle power bus system, PDM62 is used for power conversion, stability control, and temperature management in electric vehicle power systems.

[0162] Capacitor 63 is located below PDM62, and also on the side of drive motor drive board 64, drive motor IGBT65, integrated water channel 66 and generator IGBT67.

[0163] The drive motor drive board 64 is a separate drive board for the drive motor and is located above the drive motor IGBT 65.

[0164] The drive motor IGBT65 is located directly above the integrated water channel 66, which can cool the drive motor IGBT65.

[0165] The generator IGBT67 is located directly below the integrated water channel 66, which can simultaneously cool the generator IGBT67.

[0166] The drive control integrated board 68 is located at the bottom. The drive control integrated board 68 integrates the control functions of generator drive control, oil pump, electromagnetic clutch and switching solenoid valve.

[0167] Among them, the drive motor IGBT65 is connected to the drive motor (not shown) through the drive motor three-phase terminal 641, and the generator IGBT67 is connected to the generator (not shown) through the generator three-phase terminal 681.

[0168] In this embodiment, the domain control board 61, PDM 62, capacitor 63, drive motor drive board 64, drive motor IGBT 65, integrated water channel 66, generator IGBT 67 and drive control integrated board 68 are integrated into the controller assembly, realizing a high degree of controller integration. Furthermore, the integrated water channel 66 is located between the drive motor IGBT 65 and the generator IGBT 67, which can simultaneously cool the drive motor IGBT 65 and the generator IGBT 67, thus improving the cooling efficiency of the controller assembly.

[0169] Better, such as Figure 34 As shown, a shielding plate 631 is also provided between the capacitor 63 and the drive control integrated board 68.

[0170] Furthermore, such as Figure 34 As shown, it also includes an upper cover 9, which includes a small cover 91 and a large cover 92. The domain control board 61 is disposed between the small cover 91 and the large cover 92. The small cover 91 is located above the domain control board 61, and the large cover 92 is located above the PDM 62.

[0171] The cover 92 is located between the domain control board 61 and the PDM62. The domain control board 61 and the PDM62 share the cover 92, which can reduce the Z-axis (height direction) dimension of the controller assembly.

[0172] The area of ​​the small cover 91 is smaller than that of the large cover 92. The small cover 91 is used to cover the domain control board 61 on the large cover 92. The large cover 92 is used to connect with the main housing 3 of the drive system, so that the PDM 62, capacitor 63, drive motor drive board 64, drive motor IGBT 65, integrated water channel 66, generator IGBT 67 and drive control integrated board 68 can be installed in the main housing 3. The large cover 92 is sealed to the opening of the controller cavity 37, so that the PDM 62, capacitor 63, drive motor drive board 64, drive motor IGBT 65, integrated water channel 66, generator IGBT 67 and drive control integrated board 68 can be installed in the controller cavity 37.

[0173] Furthermore, PDM62 includes a PDM water channel, which is connected in series with an integrated water channel 66. Cooling water first enters the PDM water channel to cool the capacitor 63 and the internal components of PDM62, and then flows into the integrated water channel 66 to cool the drive motor IGBT65 and the generator IGBT67, thereby improving cooling efficiency.

[0174] Furthermore, such as Figures 38-39 As shown, the integrated water channel 66 includes an upper water channel 661 and a lower water channel 662. The upper water channel 661 is used to cool the drive motor IGBT 65, and the lower water channel 662 is used to cool the generator IGBT 67.

[0175] Specifically, such asFigure 38 As shown, the integrated water channel 66 also includes a water channel inlet 663 and a water channel outlet 664. The water channel inlet 663 is connected to the PDM water channel. Coolant flows from the water channel inlet 663 into the upper water channel 661. The upper water channel 661 is in direct contact with the drive motor IGBT 65, cooling the drive motor IGBT.

[0176] like Figure 39 As shown, coolant flows downwards from one side of the upper water channel 661 into the lower water channel 662. The lower water channel 662 is in direct contact with the generator IGBT 67, thus cooling the generator IGBT 67. The coolant finally flows back into the PDM 62 from the water channel outlet 664.

[0177] In this embodiment, the controller assembly integrates more components, with a more compact arrangement and a smaller footprint. Furthermore, the integrated cooling channel simultaneously cools both the drive motor IGBT65 and the generator IGBT67, improving cooling efficiency. The integrated cooling channel is also connected in series with the PDM cooling channel, further enhancing cooling efficiency.

[0178] Furthermore, such as Figure 40 As shown, the main housing 3 is provided with a water-cooled inlet pipe 38 and a water-cooled outlet pipe 39;

[0179] PDM62 includes a PDM water channel, which is connected in series with an integrated water channel 66. A water-cooled inlet pipe 38 and a water-cooled outlet pipe 39 are connected to the PDM water channel.

[0180] Specifically, such as Figure 35 As shown, the water-cooled inlet pipe 38 enters the housing of the controller cavity 37. Since the PDM62 is installed in the controller cavity 37, as... Figure 40 As shown, the water-cooled inlet pipe 38 is directly connected to the housing inlet 623 of the PDM water channel. The coolant flows from the water-cooled inlet pipe 38 into the PDM water channel, then from the PDM water channel into the integrated water channel 66, then from the integrated water channel 66 back into the PDM water channel, and finally from the PDM water channel into the water-cooled outlet pipe 39. The water-cooled outlet pipe 39 passes through the controller cavity 37 and into the generator cavity 33.

[0181] like Figure 2 As shown, the drive system also includes an oil cooler 2, and a water-cooled outlet pipe 39 is connected to the oil cooler 2. Since the oil cooler 2 is installed on the generator cavity 33, the water-cooled outlet pipe 39 is connected to the oil cooler 2 to continue cooling the oil cooler 2. Specifically, the oil in the oil cooler 2 is cooled, and finally the coolant flows out from the oil cooler 2 and into the vehicle's cooling system to cool the coolant.

[0182] Furthermore, such as Figure 37As shown, the PDM water channel includes a capacitor cooling unit 621 and a PDM cooling unit 622, which are connected in series.

[0183] like Figure 34 As shown, since capacitor 63 is mounted below PDM 62, capacitor cooling unit 621 contacts the upper surface of capacitor 63 to cool it. Coolant first flows into capacitor cooling unit 621 and then into PDM cooling unit 622. PDM cooling unit 622 is drawer-shaped, capable of cooling the sides and bottom of components located within it.

[0184] Furthermore, such as Figure 36 and Figure 40 As shown, the PDM62 is provided with a housing inlet 623, a housing outlet 624, an integrated water channel inlet 625, and an integrated water channel outlet 626. The water-cooled inlet pipe 38 is connected to the housing inlet 623, the integrated water channel inlet 625 is connected to the water channel inlet 663 of the integrated water channel 66, the integrated water channel outlet 626 is connected to the water channel outlet 664 of the integrated water channel 66, and the housing outlet 624 is connected to the water-cooled outlet pipe 39.

[0185] Specifically, such as Figure 36 As shown, the housing inlet 623 and the integrated water channel inlet 625 are arranged at the positions corresponding to the capacitor cooling unit 621 and the PDM cooling unit 622, and the housing outlet 624 and the integrated water channel outlet 626 are arranged on the side of the PDM cooling unit 622.

[0186] like Figure 40 As shown, the flow direction of the coolant cooling circuit is as follows: water-cooled inlet pipe 38 — housing inlet 623 — capacitor cooling unit 621 — PDM cooling unit 622 — integrated water channel inlet 625 — water channel inlet 663 — upper water channel 661 — lower water channel 662 — water channel outlet 664 — integrated water channel outlet 626 — housing outlet 624 — water-cooled outlet pipe 39.

[0187] The water-cooled outlet pipe 39 comprises three sections, extending from the inside of the controller cavity 37 to the inside of the generator cavity 33, facilitating communication with the oil cooler 2 installed on the generator cavity 33.

[0188] It should be noted that, Figure 40 The coolant is materialized to clearly represent its flow path.

[0189] In this embodiment, the cooling circuit of the drive system is connected to the cooling system of the whole vehicle. The cooling circuit is formed by the arrangement of the main housing 3, PDM62 and integrated water channel 66. All cooling circuits are located inside the main housing 3, without the need for external pipelines, making the overall structure of the drive system more compact and occupying less space.

[0190] In another embodiment of the present invention, such as Figures 41-42 As shown, capacitor 63 and integrated water channel 66 are integrally formed, making the overall structure more compact. The internal structure of capacitor 63 and integrated water channel 66 remains unchanged.

[0191] In addition, the integrated water channel 66 also integrates the upper row inverter three-phase terminal block 665 and the lower row inverter three-phase terminal block 666. Among them, the upper row inverter three-phase terminal block 665 connects the drive motor IGBT 65 and the drive motor three-phase terminal block 641, and the lower row inverter three-phase terminal block 666 connects the generator IGBT 67 and the generator three-phase terminal block 681.

[0192] The integrated capacitor 63, integrated water channel 66, and inverter three-phase terminal block have a more compact structure, making wiring connections easier.

[0193] The above description is merely the principle and preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several other modifications can be made based on the principle of the present invention, and these modifications should also be considered within the scope of protection of the present invention.

Claims

1. An automotive drive system, comprising a drive housing assembly, a controller assembly, and a transmission assembly, wherein the transmission assembly includes an engine, a generator, a drive motor, and a reducer; Its features are, The drive housing assembly includes a main housing, a front end cover, a rear end cover, and a top cover. The main housing includes a controller cavity, a gear cavity, a drive motor cavity, and a generator cavity. The drive motor cavity and the generator cavity are located on the same side, the gear cavity is located on the opposite side of the drive motor cavity and the generator cavity, and the controller cavity is located above the generator cavity and the gear cavity. The controller assembly is installed in the controller cavity, and the upper cover covers the top of the controller cavity; The drive motor is installed in the drive motor cavity, the generator is installed in the generator cavity, and the rear end cover covers the rear side of the drive motor cavity and the generator cavity; The reducer is installed in the gear cavity, and the front end cover covers the front side of the gear cavity; The engine is located outside the drive housing assembly, and the engine input shaft passes through the front cover and is connected to the reducer. The controller assembly, from top to bottom, includes a domain control board, PDM, capacitor, drive motor drive board, drive motor IGBT, integrated water channel, generator IGBT, and drive control integrated board; The capacitor and the integrated water channel are arranged side by side below the PDM, the drive motor IGBT is located above the integrated water channel, and the generator IGBT is located below the integrated water channel; The drive motor drive board is located between the drive motor IGBT and the PDM, and the drive control integrated board is located below the generator IGBT and the capacitor.

2. The vehicle drive system according to claim 1, characterized in that, The transmission assembly further includes a speed increaser, an electromagnetic clutch, and a direct drive gear. The speed increaser includes a speed increase bearing, a first speed increase gear, and a second speed increase gear. The speed increase bearing and the first speed increase gear are coaxially connected to the generator. The second speed increase gear is coaxially connected to the engine input shaft, the electromagnetic clutch, and the direct drive gear. The first speed increase gear meshes with the second speed increase gear.

3. The vehicle drive system according to claim 1, characterized in that, An oil pump, an oil cooler, and a solenoid valve are installed in the main housing. The oil pump pumps oil into the oil cooler, and the oil cooler cools the oil. The main housing also includes a distribution oil chamber, which is disposed in the main housing. The oil cooler delivers cooled oil to the distribution oil chamber. The distribution oil chamber includes a first oil chamber and a second oil chamber. The first oil chamber is connected to the drive motor chamber, and the second oil chamber is connected to the generator chamber. The solenoid valve is located between the first oil chamber and the second oil chamber. When the solenoid valve is opened, the oil flows from the first oil chamber into the second oil chamber.

4. The vehicle drive system according to claim 3, characterized in that, It also includes a drive motor oil circuit, a reduction system oil circuit, a generator oil circuit, and a speed-increasing system oil circuit. The first oil chamber is connected to the drive motor oil circuit and the reduction system oil circuit, and the second oil chamber is connected to the generator oil circuit and the speed-increasing system oil circuit.

5. The automotive drive system according to claim 1, characterized in that, The top cover includes a small cover and a large cover. The domain control board is disposed between the small cover and the large cover. The small cover is located above the domain control board, and the large cover is located above the PDM.

6. The vehicle drive system according to claim 1, characterized in that, The main housing is equipped with a water-cooled inlet pipe and a water-cooled outlet pipe; The PDM includes a PDM water channel, which is connected in series with the integrated water channel. The water-cooled inlet pipe and the water-cooled outlet pipe are connected to the PDM water channel.

7. The vehicle drive system according to claim 6, characterized in that, The PDM water channel includes a capacitor cooling unit and a PDM cooling unit, which are connected in series.

8. The vehicle drive system according to claim 6, characterized in that, The PDM is provided with a housing water inlet, a housing water outlet, an integrated water channel inlet, and an integrated water channel outlet. The water-cooled water inlet pipe is connected to the housing water inlet, the integrated water channel inlet is connected to the inlet of the integrated water channel, the integrated water channel outlet is connected to the outlet of the integrated water channel, and the housing water outlet is connected to the water-cooled water outlet pipe.

9. The vehicle drive system according to claim 1, characterized in that, The integrated water channel includes an upper water channel and a lower water channel. The upper water channel is used to cool the drive motor IGBT, and the lower water channel is used to cool the generator IGBT.

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