Hybrid drive system and vehicle

Abstract

The application provides a hybrid driving system and a vehicle. The hybrid driving system controls the operation of an engine, a first motor and a second motor, and a driven disc is selectively disconnected or combined with a driving disc to control the rotation direction of a second input shaft, so that the power of the engine and the first motor can be transmitted to a second output shaft through a first clutch and a second transmission gear set respectively, or the power of the engine and the first motor can be transmitted to the second output shaft through a first gear set, a first input shaft and a one-way clutch respectively, or the power of the second motor is directly transmitted to the second output shaft. By controlling the separate operation or common operation of the engine, the first motor and the second motor and controlling the direction of power flow, the hybrid driving system can provide multi-gear and multi-mode power driving modes.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile power systems, in particular to a hybrid power driving system and a vehicle. BACKGROUND

[0002] At present, the motor hybrid technology has been fully applied in new energy vehicles. The hybrid electric vehicle provides at least two power sources, usually an engine and a motor. The most representative hybrid driving system includes series system, parallel system and hybrid system.

[0003] The series system is usually composed of an engine and two motors, one of which is a generator and the other is a driving motor. The engine does not directly drive the vehicle, but generates electricity to the motor through the electric connection, and the motor directly drives the vehicle to run. Although the engine does not directly participate in driving, it can always work in the high efficiency area, but the system efficiency is low due to multiple energy conversions in the whole power path. In addition, since all the power is provided by the driving motor, the motor requires high weight and volume.

[0004] The parallel system can have three driving modes, namely pure electric, engine driving and hybrid driving. Moreover, the system usually only needs an engine and a motor, and the motor can act as a generator and a driving motor according to the needs. In the parallel system, the engine is used for continuous high-speed driving, and the motor is used for low-speed driving in the city. The power distribution of the power device is more reasonable, and it can run in the respective efficiency advantage area. However, the parallel system gives up the advantage of the series system, that is, the engine cannot always be in the best working state.

[0005] The hybrid system (series-parallel) combines the advantages of series system and parallel system, but the structure is more complex. SUMMARY

[0006] An object of the present application is to provide a hybrid power driving system to provide multi-gear and multi-mode power driving mode.

[0007] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0008] According to an aspect of the present application, a hybrid drive system is provided, comprising: an engine connected with a first input shaft; a first motor connected with a second input shaft; a planetary gear set connected with the first input shaft and the second input shaft respectively, so as to selectively transmit power of the engine to the second input shaft; a first clutch comprising a driving disc and a driven disc; the driving disc is connected with the second input shaft, and the driven disc is selectively disconnected or connected with the driving disc; a one-way clutch comprising a driving wheel and a driven wheel; the driving wheel is connected with a first output shaft, and the driven wheel is connected with a second output shaft, so that when the driving wheel rotates relative to the driven wheel in a preset direction, power of the first output shaft can be transmitted to the second output shaft; a second motor is drivingly connected with the second output shaft; a first transmission gear set is connected between the second input shaft and the first output shaft, so as to drive the first output shaft and the second input shaft to rotate in opposite directions; a second transmission gear set is connected between the driven disc and the second output shaft, so as to drive the second output shaft and the second input shaft to rotate in the same direction; and the second output shaft is used to output power to the outside.

[0009] In some embodiments of the present application, the planetary gear set comprises a sun gear, a ring gear arranged at an outer periphery of the sun gear, and a plurality of planet gears arranged between the sun gear and the ring gear; the planet gears mesh with the sun gear and the ring gear; the first input shaft is connected with the ring gear, and the second input shaft is connected with the sun gear.

[0010] In some embodiments of the present application, the planetary gear set further comprises a planet carrier connected with the planet gears, so as to drive the planet gears to be coupled or disconnected relative to the sun gear.

[0011] In some embodiments of the present application, the hybrid drive system further comprises a brake connected with the planet carrier, so as to selectively lock the planet carrier, so that the planet gears are coupled or disconnected relative to the sun gear.

[0012] In some embodiments of the present application, the first transmission gear set comprises a first driving gear fixed on the second input shaft, and a first driven gear fixed on the first output shaft; the first driven gear meshes with the first driving gear.

[0013] In some embodiments of the present application, the second transmission gear set comprises a second driving gear connected with the driven disc, a second driven gear fixed on the second output shaft, and an idler gear; the idler gear is arranged between the second driving gear and the second driven gear, and meshes with the second driving gear and the second driven gear.

[0014] In some embodiments of the present application, a third driving gear is connected to the motor shaft of the second motor, and a third driven gear engaged with the third driving gear is connected to the second output shaft.

[0015] In some embodiments of the present application, the hybrid drive system has a single motor first gear mode, a single motor second gear mode, and a single motor third gear mode; when in the single motor first gear mode, the engine and the second motor are not working, the first motor is working, and the driven disc and the driving disc are disconnected; the power of the first motor is sequentially transmitted to the second input shaft, the first transmission gear set, the first output shaft, the one-way clutch, and the second output shaft; in the single motor first gear mode, the speed ratio between the first motor and the second output shaft is S1; when in the single motor second gear mode, the engine and the first motor are not working, the second motor is working, and the driven disc and the driving disc are disconnected; the power of the second motor is transmitted to the second output shaft; in the single motor second gear mode, the speed ratio between the second motor and the second output shaft is S2; when in the single motor third gear mode, the engine and the second motor are not working, the first motor is working, and the driven disc and the driving disc are connected; the power of the first motor is sequentially transmitted to the second input shaft, the second transmission gear set, and the second output shaft; in the single motor third gear mode, the speed ratio between the first motor and the second output shaft is S3; wherein S1 is greater than S2 which is greater than S3.

[0016] In some embodiments of the present application, the hybrid drive system further comprises an intermediate shaft and a differential arranged on the intermediate shaft; a driving reduction gear is fixed on the first output shaft, and a driven reduction gear is connected to the differential; the driving reduction gear and the driven reduction gear are engaged; the intermediate shaft is used for transmitting power to the tire.

[0017] According to another aspect of the present application, the present application provides a vehicle comprising the above hybrid drive system and a tire, wherein the second output shaft is drivingly connected to the tire.

[0018] From the above technical solution, the present application at least has the following advantages and positive effects:

[0019] In the application, the first transmission gear set is arranged between the second input shaft and the first output shaft, so that the second input shaft can drive the first output shaft to rotate. The driving disc of the first clutch is connected to the second input shaft, and the second transmission gear set is arranged between the driving disc and the driven disc of the first clutch and the second output shaft, so that the second input shaft can drive the second output shaft to rotate after the driving disc and the driven disc are combined. The driving wheel of the one-way clutch is connected to the first output shaft, and the driven wheel is connected to the second output shaft, so that the power of the first output shaft can be transmitted to the second output shaft when the driving wheel rotates relative to the driven wheel in a preset direction.

[0020] The working of the engine, the first motor and the second motor is controlled, the driven disc can be selectively disconnected or combined with the driving disc to control the rotation direction of the second input shaft, so that the power of the engine and the first motor can be transmitted to the second output shaft through the first clutch and the second transmission gear set respectively, or the power of the engine and the first motor can be transmitted to the second output shaft through the first gear set, the first input shaft and the one-way clutch respectively, or the power of the second motor is directly transmitted to the second output shaft. By controlling the separate working or common working of the engine, the first motor and the second motor, and controlling the direction of power flow, the hybrid power driving system can provide multi-gear and multi-mode power driving modes. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural diagram of the hybrid power driving system of the application.

[0022] Figure 2 is a power transmission schematic diagram of the hybrid power driving system in single motor one-gear electric mode.

[0023] Figure 3 is a power transmission schematic diagram of the hybrid power driving system in single motor two-gear electric mode.

[0024] Figure 4 is a power transmission schematic diagram of the hybrid power driving system in single motor three-gear electric mode.

[0025] Figure 5 is a power transmission schematic diagram of the hybrid power driving system in double motor one-gear electric mode.

[0026] Figure 6 is a power transmission schematic diagram of the hybrid power driving system in double motor two-gear electric mode.

[0027] Figure 7 is a power transmission schematic diagram of the hybrid power driving system in engine direct drive mode.

[0028] Figure 8 is a power transmission schematic diagram of the hybrid power driving system in parallel hybrid one-level mode.

[0029] Figure 9 is a power transmission schematic diagram in parallel hybrid two-stage mode of the hybrid power drive system.

[0030] Figure 10 is a power transmission schematic diagram in extended range mode of the hybrid power drive system.

[0031] Figure 11 is a power transmission schematic diagram in brake power generation mode of the hybrid power drive system.

[0032] The reference signs are explained as follows: 100, engine; 110, first motor; 120, second motor; 121, third driving gear; 122, third driven gear; 124, motor shaft; 210, planetary gear set; 211, sun gear; 212, ring gear; 213, planet gear; 214, planet carrier; 220, first clutch; 221, driving disc; 222, driven disc; 230, one-way clutch; 240, brake; 310, first input shaft; 320, second input shaft; 410, first output shaft; 420, second output shaft; 510, first transmission gear set; 511, first driving gear; 512, first driven gear; 520, second transmission gear set; 521, second driving gear; 522, second driven gear; 523, idler gear; 600, intermediate shaft; 610, differential; 620, driving reduction gear; 630, driven reduction gear; 900, tire. DETAILED DESCRIPTION

[0033] The typical embodiments embodying the features and advantages of the present application are set forth in the specification and illustrated in the drawings. It is to be understood that the application can assume various alternative shapes and embodiments, all of which are intended to be within the scope of the present application. The description and drawings set forth in the specification and drawings are to be construed in a manner that provides support for the application as defined by the appended claims.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0035] Figure 1 is a structural diagram of the hybrid drive system of the present application.

[0036] For the convenience of description and understanding, the state shown in Figure 1 The left and right directions in the figure are the left and right directions.

[0037] Referring to Figure 1 The embodiment provides a hybrid drive system for use on a vehicle for providing power to the rotation of a tire 900. The hybrid drive system includes an engine 100, a first motor 110, a second motor 120, a planetary gear set 210, a first clutch 220, a one-way clutch 230, a first input shaft 310, a second input shaft 320, a first output shaft 410, a second output shaft 420, a first transmission gear set 510, and a second transmission gear set 520.

[0038] The planetary gear set 210 includes a sun gear 211, a ring gear 212 disposed on the outer periphery of the sun gear 211, and a planet gear 213 disposed between the sun gear 211 and the ring gear 212; the planet gear 213 engages the sun gear 211 and the ring gear 212; the first input shaft 310 is connected to the ring gear 212, and the second input shaft 320 is connected to the sun gear 211. The planetary gear set 210 is provided for transmitting power on the first input shaft 310 to the second input shaft 320.

[0039] The planetary gear set 210 further comprises a planet carrier 214, which is connected to the planet gears 213 to selectively couple or decouple the planet gears 213 relative to the sun gear 211. The coupling of the planet gears 213 and the sun gear 211 enables the power on the first input shaft 310 to be transmitted to the second input shaft 320. The decoupling of the planet gears 213 and the sun gear 211 breaks the power transmission between the first input shaft 310 and the second input shaft 320.

[0040] In the embodiment, the planet gears 213 are selectively coupled or decoupled relative to the sun gear 211. In some embodiments, the planet gears 213 are selectively coupled or decoupled relative to the ring gear 212. In other embodiments, the planet gears 213 are selectively coupled or decoupled relative to both the sun gear 211 and the ring gear 212.

[0041] In the embodiment, the hybrid drive system further comprises a brake 240, which is connected to the planet carrier 214 to selectively lock the planet carrier 214 so that the planet gears 213 are coupled or decoupled relative to the sun gear 211. In particular, when the brake 240 is used to lock the planet carrier 214, the planet gears 213 are fixed in position so that the power transmission between the sun gear 211 and the ring gear 212 is enabled.

[0042] The first clutch 220 comprises a driving disc 221 and a driven disc 222, which is selectively coupled or decoupled relative to the driving disc 221 so that the power on the driving disc 221 is transmitted to the driven disc 222.

[0043] The one-way clutch 230 comprises a driving wheel and a driven wheel. When the driving wheel rotates relative to the driven wheel in a predetermined direction, the driving wheel rotates the driven wheel so that the power of the driving wheel is transmitted to the driven wheel. In particular, the power of the driving wheel is transmitted to the driven wheel regardless of whether the driven wheel rotates or not when the driving wheel rotates relative to the driven wheel in the predetermined direction. The driving wheel and the driven wheel are decoupled when the driven wheel rotates relative to the driving wheel in the predetermined direction.

[0044] The engine 100 is connected to the first input shaft 310 to transmit the power of the engine 100 to the first input shaft 310. In the embodiment, the engine 100 and the first input shaft 310 are connected together by bolts. In some embodiments, the output shaft of the engine 100 is the first input shaft 310.

[0045] The planetary gear set 210 is connected to the first input shaft 310 and the second input shaft 320 to selectively transmit the power of the engine 100 to the second input shaft 320. The first input shaft 310 and the second input shaft 320 are located at opposite sides of the planetary gear set 210.

[0046] In this embodiment, the ring gear 212 of the planetary gear set 210 and the first input shaft 310 are connected together by a clearance fit. The sun gear 211 of the planetary gear set 210 and the second input shaft 320 are connected together by an interference fit.

[0047] When the brake 240 is operated and the engine 100 is operated, the power of the engine 100 can be transmitted to the second input shaft 320 through the first input shaft 310 and the planetary gear set 210.

[0048] The first motor 110 is connected to the second input shaft 320, and the first motor 110 and the second input shaft 320 are connected in transmission. In this embodiment, the sun gear 211 is connected to one end of the second input shaft 320, and the rotor of the first motor 110 is connected to the second input shaft 320 by an interference fit.

[0049] The driving wheel of the one-way clutch 230 is connected to the first output shaft 410, and the driven wheel is connected to the second output shaft 420, so that when the first input shaft 310 rotates relative to the second output shaft 420 in a predetermined direction, the power on the first output shaft 410 can be transmitted to the second output shaft 420. The driving wheel of the one-way clutch 230 is connected to the first output shaft 410 by an interference fit. The driven wheel of the one-way clutch 230 is connected to the second output shaft 420 by an interference fit.

[0050] The first transmission gear set 510 is connected between the second input shaft 320 and the first output shaft 410 for driving the first output shaft 410 and the second input shaft 320 to rotate towards each other. In this embodiment, the first transmission gear set 510 includes a first driving gear 511 fixed to the second input shaft 320 and a first driven gear 512 fixed to the first output shaft 410; the first driven gear 512 and the first driving gear 511 are engaged, so that the second input shaft 320 can drive the first output shaft 410 to rotate, and the second input shaft 320 and the first output shaft 410 rotate towards each other. The first driving gear 511 and the second input shaft 320 are connected by an interference fit, and the first driven gear 512 and the first output shaft 410 are connected by an interference fit.

[0051] The driving disc 221 of the first clutch 220 is connected to the second input shaft 320, and the driven disc 222 can be selectively disconnected or combined with the driving disc 221. In this embodiment, the second transmission gear set 520 is connected between the driven disc 222 and the second output shaft 420 for driving the second output shaft 420 and the second input shaft 320 to rotate in the same direction. The driving disc 221 of the first clutch 220 is sleeved on the outer periphery of the second input shaft 320 and connected to the second input shaft 320 by an interference fit.

[0052] In this embodiment, the second transmission gear set 520 includes a second driving gear 521 connected to the driven plate 222, a second driven gear 522 fixed on the second output shaft 420, and an idler gear 523; the idler gear 523 is disposed between the second driving gear 521 and the second driven gear 522, and engages with the second driving gear 521 and the second driven gear 522. The second driving gear 521 is connected together with the driven plate 222 of the first clutch 220 through a spline interference fit, and the second driving gear 521 is sleeved on the second input shaft 320 through a bearing. The idler gear 523 is sleeved on an idler shaft through a bearing.

[0053] The second motor 120 is drivingly connected to the second output shaft 420, so that power can be transmitted between the second motor 120 and the second output shaft 420. In this embodiment, a third driving gear 121 is connected to the motor shaft 124 of the second motor 120, and a third driven gear 122 that engages with the third driving gear 121 is connected to the second output shaft 420. The motor shaft 124 of the second motor 120 and the third driving gear 121 are connected together through a spline interference fit. The rotor of the second motor 120 and the motor shaft 124 are press-fitted together through a spline interference fit.

[0054] In some embodiments, the second motor 120 is directly connected to the second output shaft 420.

[0055] In this embodiment, the hybrid power drive system further includes an intermediate shaft 600 and a differential 610 disposed on the intermediate shaft 600; a driving reduction gear 620 is fixed on the first output shaft 410, and a driven reduction gear 630 is connected to the differential 610; the driving reduction gear 620 and the driven reduction gear 630 engage with each other; the intermediate shaft 600 is used to transmit power to the tire 900.

[0056] According to the property of the one-way clutch 230 that transmits torque in one direction, when the driving wheel of the one-way clutch 230 rotates counterclockwise relative to the driven wheel from the perspective of the engine 100, the one-way clutch 230 is in the engaged state; on the contrary, when the driving wheel of the one-way clutch 230 rotates clockwise relative to the driven wheel, the one-way clutch 230 is in the disengaged state. In addition, according to the property of the one-way clutch 230, when the rotational speed of the driven wheel of the one-way clutch 230 around a predetermined direction is greater than the rotational speed of the driving wheel of the one-way clutch 230 around the predetermined direction, the clutch is also in the disengaged state.

[0057] In the application, the first transmission gear set 510 is arranged between the second input shaft 320 and the first output shaft 410, so that the second input shaft 320 can drive the first output shaft 410 to rotate. The driving disc 221 of the first clutch 220 is connected to the second input shaft 320, and the second transmission gear set 520 is arranged between the driving disc 221 and the driven disc 222 of the first clutch 220 and the second output shaft 420, so that when the driving disc 221 and the driven disc 222 are combined, the second input shaft 320 can drive the second output shaft 420 to rotate. The driving wheel of the one-way clutch 230 is connected to the first output shaft 410, and the driven wheel is connected to the second output shaft 420, so that when the driving wheel rotates relative to the driven wheel in a preset direction, the power of the first output shaft 410 can be transmitted to the second output shaft 420.

[0058] The working of the engine 100, the first motor 110 and the second motor 120 is controlled, the driven disc 222 can be selectively disconnected or combined with the driving disc 221, so as to control the rotation direction of the second input shaft 320, so that the power of the engine 100 and the first motor 110 can be transmitted to the second output shaft 420 through the first clutch 220 and the second transmission gear set 520 respectively, or the power of the engine 100 and the first motor 110 can be transmitted to the second output shaft 420 through the first gear set, the first input shaft 310 and the one-way clutch 230 respectively, or the power of the second motor 120 can be directly transmitted to the second output shaft 420. By controlling the separate working or common working of the engine 100, the first motor 110 and the second motor 120, and controlling the direction of power flow, the hybrid power driving system can provide multi-gear and multi-mode power driving modes.

[0059] It should be noted that the first motor 110 and the second motor 120 are both motor generators.

[0060] In the application, by controlling the separate working or common working of the engine 100, the first motor 110 and the second motor 120, and controlling the direction of power flow, the hybrid power driving system has the following single motor one-gear electric mode, single motor two-gear electric mode, single motor three-gear electric mode, range-extending electric mode, engine 100 direct drive mode, parallel hybrid one-level mode, parallel hybrid two-level mode, double motor one-gear electric mode, double motor two-gear electric mode and brake power generation mode.

[0061] Figure 2 It is a schematic diagram of power transmission in the single motor one-gear electric mode of the hybrid power driving system.

[0062] Referring to Figure 2 , Figure 2The power transmission direction is shown by the arrow in the figure. In the single-motor first-gear electric mode, the engine 100 and the second motor 120 are not working, and the first motor 110 is working. The brake 240 is not working, and the driven disc 222 and the driving disc 221 are disconnected. The first motor 110 drives the driving wheel of the one-way clutch to rotate in the preset direction, and drives the driven wheel to rotate.

[0063] The power transmission has a path, and the power transmission direction is in sequence of the first motor 110, the second input shaft 320, the first transmission gear set 510, the first output shaft 410, the one-way clutch 230, the second output shaft 420, the driving reduction gear 620, the driven reduction gear 630, the differential 610 and the intermediate shaft 600, and is transmitted to the tire 900 through the intermediate shaft 600.

[0064] At this time, from the engine 100 side, the first motor 110 rotates clockwise, the first output shaft 410 rotates counterclockwise together with the driving wheel of the one-way clutch 230, and the one-way clutch 230 is in the combined state, so that the power output can be realized. When the vehicle is running at low speed, medium speed, medium-high speed, the system can drive in the single-motor first-gear driving mode.

[0065] It should be noted that in the single-motor first-gear electric mode, the speed ratio between the first motor 110 and the second output shaft 420 is S1.

[0066] Figure 3 is a schematic diagram of power transmission in the single-motor second-gear electric mode of the hybrid power driving system.

[0067] Referring to Figure 3 , Figure 3 The power transmission direction is shown by the arrow in the figure. In the single-motor second-gear electric mode, the engine 100 and the first motor 110 are not working, and the second motor 120 is working. The brake 240 is not working, and the driven disc 222 and the driving disc 221 are disconnected.

[0068] The power transmission has a path, and the power transmission direction is in sequence of the second motor 120, the second output shaft 420, the driving reduction gear 620, the driven reduction gear 630, the differential 610 and the intermediate shaft 600, and is transmitted to the tire 900 through the intermediate shaft 600.

[0069] When the vehicle is running at full speed, the system can drive in the single-motor second-gear driving mode. When the vehicle is running at medium speed and high speed, the single-motor second-gear driving mode is used, which can reduce the driving speed of the second motor 120, so that the second motor 120 is in a higher efficient driving interval.

[0070] In the single-motor second-gear mode, the speed ratio between the second motor 120 and the second output shaft 420 is S2; S2 is less than S1.

[0071] When the vehicle is in single motor first gear electric mode, the second motor 120 rotates along with the first motor 110, the one-way clutch 230 is in the engaged state, the power is transmitted from the driving wheel of the one-way clutch 230 to the driven wheel of the one-way clutch 230, and the rotating speeds are the same. When it is needed to switch from single motor first gear electric mode to single motor second gear driving mode, the second motor 120 is started and the rotating speed of the second motor 120 is controlled to be higher than that of the first motor 110, so that the rotating speed of the driven wheel of the one-way clutch 230 is higher than that of the driving wheel of the one-way clutch 230, the one-way clutch 230 is in the disengaged state, and the vehicle enters single motor second gear electric mode, driven by the second motor 120, and the first motor 110 is out of work. The whole gear shifting process has power transmission to the vehicle end all the time, and there is no power interruption at all.

[0072] Figure 4 is a schematic diagram of power transmission in single motor third gear electric mode of the hybrid power driving system.

[0073] Referring to Figure 4 , Figure 4 The power transmission direction is shown by the arrow direction in the figure. In single motor third gear electric mode, the engine 100 and the second motor 120 are not working, the first motor 110 is working, the brake 240 is not working, and the driving disc 221 and the driven disc 222 are engaged. The one-way clutch 230 is not working.

[0074] The power transmission has a path, and the power transmission direction is in sequence of the first motor 110, the second input shaft 320, the second transmission gear set 520, the second output shaft 420, the driving reduction gear 620, the driven reduction gear 630, the differential 610, and the intermediate shaft 600, and is transmitted to the tire 900 through the intermediate shaft 600.

[0075] At this time, from the side of the engine 100, the first motor 110 rotates counterclockwise, the first output shaft 410 rotates clockwise along with the driving wheel of the one-way clutch 230, and the second output shaft 420 rotates counterclockwise along with the driven wheel of the one-way clutch 230. According to the principle of the one-way clutch 230 described above, the one-way clutch 230 is in the disengaged state. When the vehicle is in high-speed driving, the system can drive in single motor third gear mode.

[0076] In single motor third gear mode, the speed ratio between the first motor 110 and the second output shaft 420 is S3; S3 is less than S2.

[0077] When the vehicle is in single motor two-gear electric mode, the first motor 110 rotates with the second motor 120 driving at this time, the one-way clutch 230 is in the disengaged state, when it is needed to switch from single motor two-gear electric mode to single motor three-gear drive mode, the driving disc 221 and the driven disc 222 of the first clutch 220 are combined through the brake 240, the first motor 110 is started and the rotating speed of the first motor 110 is controlled, the one-way clutch 230 is in the disengaged state, at this time, the single motor three-gear electric mode is entered, the first motor 110 drives, and the second motor 120 is in the non-working state. The whole shifting process always has power transmission to the vehicle end, and there is no power interruption at all.

[0078] Figure 5 is a schematic diagram of power transmission in the hybrid power driving system in the double motor one-gear electric mode.

[0079] Referring to Figure 5 , Figure 5 The power transmission direction is shown by the arrow direction in the figure, in the double motor one-gear electric mode, the engine 100 does not work, the first motor 110 and the second motor 120 work, and the brake 240 does not work. The driving disc of the one-way clutch rotates in the preset direction, driving the driven disc to rotate.

[0080] The power transmission has two paths, the first power transmission direction is first motor 110, second input shaft 320, first transmission gear set 510, first output shaft 410, one-way clutch 230, second output shaft 420, driving reduction gear 620, driven reduction gear 630, differential 610 and intermediate shaft 600 in turn, and is transmitted to tire 900 through intermediate shaft 600.

[0081] The second power transmission direction is second motor 120, second output shaft 420, driving reduction gear 620, driven reduction gear 630, differential 610 and intermediate shaft 600 in turn, and is transmitted to tire 900 through intermediate shaft 600.

[0082] At this time, from the engine 100 side, the first motor 110 and the second motor 120 rotate clockwise, the driving disc of the one-way clutch 230 and the driven disc of the one-way clutch 230 rotate counterclockwise, and the rotating speeds are the same, so that the power can be coupled and transmitted. When the vehicle is in low-speed acceleration driving (providing more power), the system can drive in the double motor one-gear electric mode.

[0083] Figure 6 is a schematic diagram of power transmission in the hybrid power driving system in the double motor two-gear electric mode.

[0084] Referring to Figure 6 , Figure 6The power transmission direction is shown by the arrow in the figure. In the two-motor two-gear electric mode, the engine 100 is not working, the first motor 110 and the second motor 120 are working, the brake 240 is not working, and the driving disc 221 and the driven disc 222 are combined. The one-way clutch 230 is not working.

[0085] The power transmission has two paths. The first power transmission direction is the first motor 110, the second input shaft 320, the second transmission gear set 520, the second output shaft 420, the driving reduction gear 620, the driven reduction gear 630, the differential 610, and the intermediate shaft 600 in turn, and is transmitted to the tire 900 through the intermediate shaft 600.

[0086] The second power transmission direction is the second motor 120, the second output shaft 420, the driving reduction gear 620, the driven reduction gear 630, the differential 610, and the intermediate shaft 600 in turn, and is transmitted to the tire 900 through the intermediate shaft 600.

[0087] At this time, from the engine 100 side, the first motor 110 rotates counterclockwise, the second motor 120 rotates clockwise, the driving wheel of the one-way clutch 230 rotates clockwise, the driven wheel of the one-way clutch 230 rotates counterclockwise, and the one-way clutch 230 is in a separated state. The two power transmission paths are coupled at the driven wheel of the one-way clutch 230. When the vehicle is in a high-speed sudden acceleration driving, the system can drive in the two-motor two-gear electric mode.

[0088] Figure 7 is a schematic diagram of power transmission of the hybrid power driving system in the engine direct drive mode.

[0089] Referring to Figure 7 , Figure 7 The power transmission direction is shown by the arrow in the figure. In the engine 100 direct drive mode, the engine 100 is working, the first motor 110 and the second motor 120 are not working, the brake 240 is working, and the driving disc 221 and the driven disc 222 are combined. The one-way clutch 230 is not working.

[0090] The power transmission has one path. The power transmission direction is the engine 100, the first input shaft 310, the planetary gear set 210, the second input shaft 320, the second transmission gear set 520, the second output shaft 420, the driving reduction gear 620, the driven reduction gear 630, the differential 610, and the intermediate shaft 600 in turn, and is transmitted to the tire 900 through the intermediate shaft 600.

[0091] At this time, from the engine 100 side, the engine 100 is clockwise rotation, through the planetary row 210 of the speed and the change of direction, the second input shaft 320 together with the first driving gear 511 counterclockwise rotation; the first output shaft 410 together with the driving wheel of the one-way clutch 230 clockwise rotation, the second output shaft 420 together with the driven wheel of the one-way clutch 230 counterclockwise rotation, according to the foregoing setting, the one-way clutch 230 is in the separation state. When the vehicle is in the medium speed, high speed driving, the system can be driven in the engine 100 direct drive mode.

[0092] Figure 8 is a schematic diagram of power transmission in the parallel hybrid two-stage mode of the hybrid power drive system.

[0093] Referring to Figure 8 , Figure 8 The power transmission direction is shown by the arrow direction in the figure, in the parallel hybrid two-stage mode, the engine 100 and the second motor 120 work, the first motor 110 does not work, the brake 240 works, the driving disc 221 and the driven disc 222 are combined. The one-way clutch 230 does not work.

[0094] The power transmission has two paths, the first power transmission direction is in turn the engine 100, the first input shaft 310, the planetary row 210, the second input shaft 320, the second transmission gear set 520, the second output shaft 420, the driving reduction gear 620, the driven reduction gear 630, the differential 610 and the intermediate shaft 600, and is transmitted to the tire 900 through the intermediate shaft 600.

[0095] The second power transmission direction is in turn the second motor 120, the second output shaft 420, the driving reduction gear 620, the driven reduction gear 630, the differential 610 and the intermediate shaft 600, and is transmitted to the tire 900 through the intermediate shaft 600.

[0096] At this time, from the engine 100 side, the second motor 120 is clockwise rotation, the engine 100 is clockwise rotation, through the planetary row 210 of the speed and the change of direction, the second input shaft 320 together with the first driving gear 511 counterclockwise rotation; the driving wheel of the one-way clutch 230 is clockwise rotation, the driven wheel of the one-way clutch 230 is counterclockwise rotation, the one-way clutch 230 is in the separation state. When the vehicle is in the low speed, medium speed, medium speed, the system can be driven in the parallel hybrid two-stage mode.

[0097] Figure 9 is a schematic diagram of power transmission in the parallel hybrid two-stage mode of the hybrid power drive system.

[0098] Referring to Figure 9 , Figure 9The power transmission direction is shown by the arrow in the figure. In the parallel hybrid two-stage mode, the engine 100 and the first motor 110 work, the second motor 120 does not work, the brake 240 works, and the driving disc 221 and the driven disc 222 are combined. The one-way clutch 230 does not work.

[0099] The power transmission has two paths. The first power transmission direction is in sequence the engine 100, the first input shaft 310, the planetary gear set 210, the second input shaft 320, the second transmission gear set 520, the second output shaft 420, the driving reduction gear 620, the driven reduction gear 630, the differential 610, and the intermediate shaft 600, and is transmitted to the tire 900 through the intermediate shaft 600.

[0100] The second power transmission direction is in sequence the first motor 110, the second input shaft 320, the second transmission gear set 520, the second output shaft 420, the driving reduction gear 620, the driven reduction gear 630, the differential 610, and the intermediate shaft 600, and is transmitted to the tire 900 through the intermediate shaft 600.

[0101] At this time, from the engine 100 side, the first motor 110 rotates counterclockwise, the engine 100 rotates clockwise, and after the speed increase and change of direction of the planetary gear set 210, the second input shaft 320 rotates counterclockwise together with the first driving gear 511; the driving wheel of the one-way clutch 230 rotates clockwise, the driven wheel of the one-way clutch 230 rotates counterclockwise, and the one-way clutch 230 is in a separated state. When the vehicle is in high-speed rapid acceleration driving, the system can drive in the parallel hybrid two-stage mode.

[0102] Figure 10 is a schematic diagram of power transmission in the range extending mode of the hybrid power drive system.

[0103] Referring to Figure 10 , Figure 10 The power transmission direction is shown by the arrow in the figure. In the parallel hybrid two-stage mode, the engine 100 and the first motor 110 work, the second motor 120 does not work, the brake 240 works, and the driving disc 221 and the driven disc 222 are combined. The one-way clutch 230 does not work.

[0104] The power transmission has two paths. The first power transmission direction is in sequence the engine 100, the first input shaft 310, the planetary gear set 210, the second input shaft 320, the second transmission gear set 520, the second output shaft 420, the driving reduction gear 620, the driven reduction gear 630, the differential 610, and the intermediate shaft 600, and is transmitted to the tire 900 through the intermediate shaft 600.

[0105] At this time, the second motor 120 rotates counterclockwise from the engine 100 side, the engine 100 rotates clockwise, and the second input shaft 320 rotates counterclockwise together with the first driving gear 511 through the speed increase and the reversing of the planetary gear set 210; the driving wheel of the one-way clutch 230 rotates clockwise, the driven wheel of the one-way clutch 230 rotates counterclockwise, and the one-way clutch 230 is in the disengaged state.

[0106] Figure 11 is a schematic diagram of power transmission in the braking power generation mode of the hybrid drive system.

[0107] Referring to Figure 11 , Figure 11 The power transmission direction is shown by the arrow direction in the figure, in the braking power generation mode, the engine 100 and the first motor 110 do not work, the brake 240 does not work, the driving disc 221 and the driven disc 222 are disconnected. The one-way clutch 230 does not work, and the power in the vehicle braking is transmitted from the tire 900 end to the second motor 120 for power generation.

[0108] In the present application, through different power transmission directions, the driving mode of three gears of a single motor can be realized, the first transmission gear set 510 and the second transmission gear set 520 have different speed ratios, and through reasonable speed ratio relationship, the use of the motor can be effectively adjusted according to the demand, and the efficiency is improved.

[0109] The switching of the three gears of the single motor is realized by the two motors, the first clutch 220 and the one-way clutch 230. The single motor first gear is set to the output of the first motor 110, and the speed ratio is large. The single motor second gear is set to the output of the second motor 120, and the speed ratio is relatively small. The single motor third gear is set to the output of the first motor 110, and the speed ratio is the smallest. At the same time, the driving wheel of the one-way clutch 230 is connected with the first motor 110, and the driven end is directly connected with the second motor 120 and the wheel end. According to the property of the one-way clutch 230, when the speed of the driven end is greater than that of the driving end, the one-way clutch 230 is in the disengaged state, so that the power interruption in the gear shifting process can be realized.

[0110] According to the property of the one-way clutch 230, at high vehicle speed, the speed decoupling of the wheel end and the first motor 110 can be realized, and the high speed requirement of the first motor 110 can be reduced. In addition, since the speed ratio of the single motor second gear is relatively small, when the vehicle speed is very high, the speed of the second motor 120 will not be very high. Such a setting can realize the high speed demand of the vehicle.

[0111] In the high speed stage, the hybrid drive of the engine 100, the second motor 120 or the first motor 110 can still be realized, and the power demand of the vehicle in the high speed stage can be met.

[0112] While the application has been described with reference to several exemplary embodiments, it is to be understood that the use of other words or terminologies used herein is intended to convey a practical and conceptual understanding of the present application to others skilled in the art. As such, it is submitted that the foregoing description and examples have been apparent in terms of their structures and functions, and are susceptible to various changes without departing from the spirit or essence thereof. Consequently, it is respected that all equivalent variations and modifications are intended to be included within the scope of the appended claims and their equivalents.

Claims

1. A hybrid power drive system, characterized in that, include: An engine, which is connected to a first input shaft; The first motor is connected to the second input shaft; A planetary gear set, which connects the first input shaft and the second input shaft respectively, so as to selectively transmit the power of the engine to the second input shaft; The first clutch includes a driving plate and a driven plate; The driving disk is connected to the second input shaft, and the driven disk can selectively disconnect from or connect to the driving disk; A one-way clutch includes a driving wheel and a driven wheel; the driving wheel is connected to a first output shaft, and the driven wheel is connected to a second output shaft, so that when the driving wheel rotates relative to the driven wheel about a preset direction, the power of the first output shaft can be transmitted to the second output shaft; The second motor is connected to the second output shaft via a drive mechanism. A first transmission gear set is connected between the second input shaft and the first output shaft to drive the first output shaft and the second input shaft to rotate in opposite directions; The second transmission gear set is connected between the driven disc and the second output shaft to drive the second output shaft and the second input shaft to rotate in the same direction; The second output shaft is used to output power outward.

2. The hybrid drive system according to claim 1, characterized in that, The planetary gear set includes a sun gear, a ring gear disposed on the outer periphery of the sun gear, and planet gears disposed between the sun gear and the ring gear; the planet gears mesh with the sun gear and the ring gear; the first input shaft is connected to the ring gear, and the second input shaft is connected to the sun gear.

3. The hybrid drive system according to claim 2, characterized in that, The planetary gear set also includes a planet carrier that connects to the planetary gears, enabling the planetary gears to couple or disconnect relative to the sun gear.

4. The hybrid drive system according to claim 3, characterized in that, The hybrid drive system also includes a brake connected to the planet carrier to selectively lock the planet carrier, thereby coupling and disconnecting the planet gears relative to the sun gear.

5. The hybrid drive system according to claim 1, characterized in that, The first transmission gear set includes a first driving gear fixed on the second input shaft and a first driven gear fixed on the first output shaft; the first driven gear and the first driving gear mesh.

6. The hybrid drive system according to claim 1, characterized in that, The second transmission gear set includes a second driving gear connected to the driven disc, a second driven gear fixed on the second output shaft, and an idler gear; the idler gear is disposed between the second driving gear and the second driven gear, and the idler gear meshes with the second driving gear and the second driven gear.

7. The hybrid drive system according to claim 1, characterized in that, The second motor has a third driving gear connected to its motor shaft, and the second output shaft has a third driven gear that meshes with the third driving gear.

8. The hybrid drive system according to claim 1, characterized in that, The hybrid drive system has a single-motor first-gear mode, a single-motor second-gear mode, and a single-motor third-gear mode. When in single-motor first-gear mode, the engine and the second motor are not working, the first motor is working, and the driven plate and the driving plate are disconnected; the power of the first motor is sequentially transmitted to the second input shaft, the first transmission gear set, the first output shaft, the one-way clutch, and the second output shaft; in single-motor first-gear mode, the speed ratio between the first motor and the second output shaft is S1; When in single-motor second-gear mode, the engine and the first motor are not working, the second motor is working, and the driven plate and the driving plate are disconnected. The power of the second motor is transmitted to the second output shaft; in the single motor two-speed mode, the speed ratio between the second motor and the second output shaft is S2; When in single-motor three-speed mode, the engine and the second motor are not working, the first motor is working, and the driven plate and the driving plate are engaged; the power of the first motor is sequentially transmitted to the second input shaft, the second transmission gear set, and the second output shaft; in single-motor three-speed mode, the speed ratio between the first motor and the second output shaft is S3; Among them, S1 is greater than S2, which is greater than S3.

9. The hybrid drive system according to claim 1, characterized in that, The hybrid drive system also includes an intermediate shaft and a differential mounted on the intermediate shaft; a driving reduction gear is fixed on the first output shaft, and a driven reduction gear is connected to the differential; the driving reduction gear and the driven reduction gear mesh; the intermediate shaft is used to transmit power to the tires.

10. A vehicle, characterized in that, The system includes a hybrid drive system as described in any one of claims 1 to 9 and a tire, wherein the second output shaft is driven to the tire.

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