A hybrid power system, a control method for a hybrid power system, and an automobile

Abstract

This application relates to the field of power transmission technology, and particularly to a hybrid power system, a control method for a hybrid power system, and an automobile. The hybrid power system includes a planetary gear train, a first output shaft, an engine, an electric motor, a second output shaft, a first clutch unit, a front differential, a second clutch unit, and a rear differential. The planetary gear train includes a sun gear, planetary gears, a ring gear, and a planet carrier. The sun gear, planetary gears, and ring gear mesh sequentially. The planet carrier drives the planetary gears and the first output shaft. The engine is driven by the ring gear. The electric motor is driven by the sun gear. The second output shaft is driven by the ring gear. The first clutch unit connects the first output shaft and the front differential. The second clutch unit connects the second output shaft and the rear differential. The hybrid power system provided by this application simplifies the structure and reduces production costs.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power transmission, in particular to a hybrid power system, a control method of the hybrid power system and an automobile. BACKGROUND

[0002] An automobile is a common means of transportation, which generally generates power through wheel rotation to realize the function of transporting goods and carrying passengers.

[0003] The automobile generally includes a power source, a transmission mechanism and wheels. The power generated by the power source is transmitted to the wheels after being integrated by the transmission mechanism.

[0004] In the related art, in order to adapt to complex road conditions, each wheel of the automobile can generally receive different power, thereby improving adaptability. This results in a relatively complex structure of the transmission mechanism and a high cost. SUMMARY

[0005] In view of this, the present application provides a hybrid power system, a control method of the hybrid power system and an automobile to simplify the structure and reduce the production cost.

[0006] Specifically, the technical scheme includes the following:

[0007] A first aspect of the present application provides a hybrid power system, which includes a planetary gear train, a first output shaft, an engine, a motor, a second output shaft, a first clutch unit, a front wheel differential, a second clutch unit and a rear wheel differential, wherein

[0008] The planetary gear train includes a sun gear, a planet gear, a ring gear and a planet carrier, the sun gear, the planet gear and the ring gear are sequentially engaged, and the planet carrier is drivingly connected to the planet gear and the first output shaft;

[0009] The engine is drivingly connected to the ring gear;

[0010] The motor is drivingly connected to the sun gear;

[0011] The second output shaft is drivingly connected to the ring gear;

[0012] The first clutch unit connects the first output shaft and the front wheel differential;

[0013] The second clutch unit connects the second output shaft and the rear wheel differential.

[0014] Optionally, the hybrid power system includes a transmission shaft, one end of the transmission shaft is drivingly connected to the motor, and the other end of the transmission shaft is drivingly connected to the sun gear.

[0015] Optionally, the hybrid power system comprises an extension part, the extension part is drivingly connected with the ring gear and the second output shaft, and the ring gear and the second output shaft are spaced apart along a radial direction of the second output shaft.

[0016] Optionally, the extension part comprises a first sprocket, a second sprocket and a transmission chain, the first sprocket is drivingly connected with the ring gear, the second sprocket is drivingly connected with the second output shaft, and the transmission chain is wrapped around outer sides of the first sprocket and the second sprocket.

[0017] Optionally, the planetary gear system comprises a transmission cylinder, the transmission cylinder is located on a side opposite to the ring gear relative to the carrier, and the transmission cylinder is drivingly connected with the ring gear, the first sprocket is sleeved on an outer side of the transmission cylinder and drivingly connected with the transmission cylinder, and the transmission shaft passes through a hollow part of the transmission cylinder.

[0018] Optionally, the hybrid power system comprises a torsional damper, the engine comprises an input shaft, the torsional damper is sleeved on the input shaft, and the input shaft is drivingly connected with the transmission cylinder.

[0019] Optionally, the hybrid power system comprises a first input gear, the planetary gear system comprises a first output gear, the first input gear is sleeved on the input shaft and drivingly connected with the input shaft, and the first output gear is fixed on the transmission cylinder, the first input gear is in mesh with the first output gear.

[0020] Optionally, the planetary gear system comprises a second input gear, the second input gear is drivingly connected with the carrier, the first output shaft has a second output gear, and the second input gear is in mesh with the second output gear.

[0021] A second aspect of the present application provides a control method of a hybrid power system, the control method of the hybrid power system is applied to the hybrid power system as described in the above technical solution, and the control method comprises:

[0022] controlling the engine, the motor, the planetary gear system, the first clutch unit and the second clutch unit, so that the hybrid power system can enter any one of a pure electric mode, a first engine-only driving mode, a second engine-only driving mode, a third engine-only driving mode, a hybrid driving mode, a driving charging mode and a regenerative braking mode.

[0023] In the pure electric mode, the ring gear is locked, the engine is turned off, the motor works in a driving state, the first clutch unit is engaged, and the second clutch unit is disconnected.

[0024] In the second engine-only drive mode, the sun gear is locked, the engine is working, the motor is turned off, the first clutch unit is disconnected, and the second clutch unit is connected.

[0025] In the second engine-only drive mode, the sun gear is locked, the engine is working, the motor is turned off, the first clutch unit is disconnected, and the second clutch unit is connected.

[0026] In the third engine-only drive mode, the sun gear is locked, the engine is working, the motor is turned off, the first clutch unit is connected, and the second clutch unit is connected.

[0027] In the hybrid drive mode, the planet carrier is locked, the engine is working, the motor is working in a driving state, the first clutch unit is disconnected, and the second clutch unit is connected.

[0028] In the hybrid drive mode, the planet carrier is locked, the engine is working, the motor is working in a driving state, the first clutch unit is disconnected, and the second clutch unit is connected.

[0029] In the regenerative braking mode, the engine is turned off, the motor is working in a power generation state, the first clutch unit is connected, and the second clutch unit is disconnected.

[0030] The second aspect of the present application provides an automobile, which comprises the hybrid power system as described in the above technical solution.

[0031] The technical solution provided by the embodiments of the present application has at least the following beneficial effects: the engine and the motor can output power as a power source. The planetary gear train can receive power from the engine and the motor. The planetary gear train can simultaneously output different powers to the first output shaft and the second output shaft through the ring gear and the planet carrier. The first clutch unit and the second clutch unit are beneficial to the power output by the first output shaft to the front differential and the power output by the second output shaft to the rear differential, and thus the hybrid power system can realize four-wheel drive.

[0032] In summary, the hybrid power system of the present application realizes timely four-wheel drive by using the planetary gear train transmission, and omits components such as a transfer device specially used for distributing power, thereby simplifying the overall structure and reducing production costs. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0034] Figure 1 A structural schematic diagram of a hybrid power system provided by an embodiment of the present application;

[0035] Figure 2 A power transmission diagram of a first hybrid power system provided by an embodiment of the present application;

[0036] Figure 3 A power transmission diagram of a second hybrid power system provided by an embodiment of the present application;

[0037] Figure 4 A power transmission diagram of a third hybrid power system provided by an embodiment of the present application;

[0038] Figure 5 A power transmission diagram of a fourth hybrid power system provided by an embodiment of the present application;

[0039] Figure 6 A power transmission diagram of a fifth hybrid power system provided by an embodiment of the present application;

[0040] Figure 7 A power transmission diagram of a sixth hybrid power system provided by an embodiment of the present application;

[0041] Figure 8 A power transmission diagram of a seventh hybrid power system provided by an embodiment of the present application.

[0042] The reference signs in the drawings respectively represent:

[0043] 1, planetary gear train; 11, sun gear; 12, planet gear; 13, ring gear; 14, planet carrier; 15, transmission cylinder; 16, first output gear; 17, second input gear;

[0044] 2, first output shaft; 21, second output gear;

[0045] 3, engine; 31, input shaft; 32, first input gear;

[0046] 4, motor;

[0047] 5, second output shaft;

[0048] 6, first clutch unit;

[0049] 7, front differential;

[0050] 8. The second clutch unit;

[0051] 9. The rear wheel differential;

[0052] 101. The propeller shaft;

[0053] 102. The extension; 1021. The first sprocket; 1022. The second sprocket; 1023. The transmission chain;

[0054] 103. The torsion damper.

[0055] The specific embodiments of the present application have been shown in the above-described drawings, and will be described in more detail hereinafter. These drawings and detailed description are not intended to limit the scope of the present application concept in any way, but to illustrate the present application concept to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0057] The orientation terms such as "upper", "lower", "side", etc. involved in the embodiments of the present application are generally based on the relative relationship of the orientation shown in the drawings, and these orientation terms are only used to more clearly describe the structure and the relationship between the structures, and are not intended to describe absolute orientation. When the product is placed in different attitudes, the orientation may change, for example, "upper" and "lower" may be interchanged. Figure 1

[0058] Unless otherwise defined, all the technical terms used in the embodiments of the present application have the same meaning as commonly understood by those skilled in the art.

[0059] In order to make the technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the drawings.

[0060] The first aspect of the present application provides a hybrid system, as shown in Figure 1 The hybrid system includes a planetary gear set 1, a first output shaft 2, an engine 3, a motor 4, a second output shaft 5, a first clutch unit 6, a front wheel differential 7, a second clutch unit 8, and a rear wheel differential 9, wherein,

[0061] ​The planetary gear train 1 comprises a sun gear 11, a planet gear 12, a ring gear 13 and a planet carrier 14, the sun gear 11, the planet gear 12 and the ring gear 13 are sequentially engaged, and the planet carrier 14 is drivingly connected with the planet gear 12 and the first output shaft 2.

[0062] The engine 3 is drivingly connected with the ring gear 13.

[0063] The motor 4 is drivingly connected with the sun gear 11.

[0064] The second output shaft 5 is drivingly connected with the ring gear 13.

[0065] The first clutch unit 6 connects the first output shaft 2 and the front differential 7.

[0066] The second clutch unit 8 connects the second output shaft 5 and the rear differential 9.

[0067] It can be understood that the engine 3 and the motor 4 can output power as a power source. The planetary gear train 1 can receive power from the engine 3 and the motor 4. The planetary gear train 1 can output different powers to the first output shaft 2 and the second output shaft 5 through the ring gear 13 and the planet carrier 14. The first clutch unit 6 and the second clutch unit 8 are arranged to facilitate the power output by the first output shaft 2 to the front differential 7 and the power output by the second output shaft 5 to the rear differential 9 to be independent of each other, which facilitates the four-wheel drive of the hybrid power system.

[0068] In the embodiment, the first output shaft 2 can drive the front differential 7 to rotate, so that the two front wheels located in the front differential 7 are affected by the power distribution of the differential and the condition of the road surface, so that the rotational speeds of the two front wheels are different, and the power distribution is realized.

[0069] In the embodiment, when the first clutch unit 6 is combined, the first output shaft 2 can drive the front differential 7 to rotate, thereby realizing power distribution; when the first clutch unit 6 is disconnected, the first output shaft 2 cannot drive the front differential 7 to rotate, which is conducive to the planetary gear train 1 driving the rear differential 9 alone.

[0070] In the embodiment, the second output shaft 5 can drive the rear differential 9 to rotate, so that the two rear wheels located in the rear differential 9 are affected by the power distribution of the differential and the condition of the road surface, so that the rotational speeds of the two rear wheels are different, and the power distribution is realized.

[0071] In the embodiment, the first clutch unit 6 can be one of an electromagnetic clutch, a friction clutch or a hydraulic clutch.

[0072] In the embodiment, the second clutch unit 8 can be one of an electromagnetic clutch, a friction clutch or a hydraulic clutch.

[0073] In this embodiment, when the second clutch unit 8 is engaged, the second output shaft 5 can drive the rear wheel differential 9 to rotate, thereby achieving power distribution; when the second clutch unit 8 is disengaged, the second output shaft 5 cannot drive the rear wheel differential 9 to rotate, which is beneficial for the planetary gear train 1 to drive the front wheel differential 7 independently.

[0074] In this application, the engine 3 generally outputs power through the crankshaft, which can drive the gear ring 13 to rotate to achieve power transmission.

[0075] In this application, the motor 4 is connected to the sun gear 11 via a transmission. The motor 4 can directly drive the sun gear 11 to rotate, or it can drive the sun gear 11 to rotate through the speed reduction and torque amplification effect of the intermediate component, thus achieving the transmission connection.

[0076] In this embodiment, the second output shaft 5 can be connected to the gear ring 13 through meshing to form a transmission connection.

[0077] In the embodiments of this application, the number of planetary gears 12 can be 2, 3 or 4, or other numbers, so as to be able to transmit power between the sun gear 11 and the ring gear 13.

[0078] In this embodiment, the planetary gear 12 and the planet carrier 14 can be connected by a key to achieve a transmission connection.

[0079] In this embodiment, the hybrid power system has seven operating modes, specifically including:

[0080] 1. Pure electric mode

[0081] In the current mode, gear ring 13 is locked, engine 3 is off, motor 4 is in drive mode, first clutch unit 6 is engaged, and second clutch unit 8 is disengaged.

[0082] like Figure 2 As shown, the power transmission path is as follows: the motor 4 generates power and transmits it to the sun gear 11. The sun gear 11 drives the planetary carrier 14 to rotate and transmits it to the first output shaft 2. The first output shaft 2 drives the front wheel differential 7 to rotate.

[0083] The current mode is suitable for various low-speed operating situations such as vehicle start-up and driving in congested areas.

[0084] 2. One of the three engine-only drive modes:

[0085] In the current mode, the sun gear 11 is locked, the engine 3 is running, the motor 4 is off, the first clutch unit 6 is engaged, and the second clutch unit 8 is disengaged.

[0086] like Figure 3As shown, the power transmission path is: the power generated by the engine 3 is transmitted to the ring gear 13, the ring gear 13 rotates by driving the planet carrier 14, and the power is transmitted to the first output shaft 2, and the first output shaft 2 drives the front differential 7 to rotate.

[0087] At this time, the vehicle is in the front two-wheel drive state.

[0088] 3, the second engine 3 single drive mode

[0089] In the current mode, the sun gear 11 is locked, the engine 3 is working, the motor 4 is closed, the first clutch unit 6 is disconnected, and the second clutch unit 8 is connected.

[0090] As shown, Figure 4 the power transmission path is: the power generated by the engine 3 is transmitted to the ring gear 13, the ring gear 13 rotates by driving the second output shaft 5, and the power is transmitted to the second output shaft 5, and the second output shaft 5 drives the rear differential 9 to rotate.

[0091] At this time, the vehicle is in the rear two-wheel drive state.

[0092] 4, the third engine 3 single drive mode

[0093] In the current mode, the sun gear 11 is locked, the engine 3 is working, the motor 4 is closed, the first clutch unit 6 is connected, and the second clutch unit 8 is connected.

[0094] As shown, Figure 5 the power transmission path has two paths:

[0095] a, the power generated by the engine 3 is transmitted to the ring gear 13, the ring gear 13 rotates by driving the planet carrier 14, and the power is transmitted to the first output shaft 2, and the first output shaft 2 drives the front differential 7 to rotate.

[0096] b, the power generated by the engine 3 is transmitted to the ring gear 13, the ring gear 13 rotates by driving the second output shaft 5, and the power is transmitted to the second output shaft 5, and the second output shaft 5 drives the rear differential 9 to rotate.

[0097] 5, hybrid drive mode

[0098] In the current mode, the planet carrier 14 is locked, the engine 3 is working, the motor 4 is working in the driving state, the first clutch unit 6 is disconnected, and the second clutch unit 8 is connected.

[0099] As shown, Figure 6 the power output path has two paths:

[0100] a, the power generated by the motor 4 is transmitted to the sun gear 11, the sun gear 11 rotates by driving the ring gear 13, and the power is transmitted to the second output shaft 5, and the second output shaft 5 drives the rear differential 9 to rotate.

[0101] b. The power generated by the engine 3 drives the ring gear 13 to rotate, and the ring gear 13 transmits the power to the second output shaft 5, and the second output shaft 5 drives the rear differential 9 to rotate.

[0102] At this time, the vehicle is in the rear-wheel two-wheel drive state.

[0103] 6. Driving mode

[0104] In the current mode, the planet carrier 14 is locked, the engine 3 is working, the motor 4 is working in the power generation state, the first clutch unit 6 is disconnected, and the second clutch unit 8 is connected.

[0105] As shown in the figure, there are two power transmission paths: Figure 7 a. The power generated by the engine 3 drives the ring gear 13 to rotate, and the ring gear 13 transmits the power to the second output shaft 5, and the second output shaft 5 drives the rear differential 9 to rotate.

[0106] b. The power generated by the engine 3 drives the ring gear 13 to rotate, and the ring gear 13 transmits the power to the sun gear 11, and the sun gear 11 drives the motor 4 to work to generate electricity.

[0107] At this time, the vehicle is in the rear-wheel two-wheel drive state, and the motor 4 is reversely driven to generate electricity.

[0108] 7. Regenerative braking mode

[0109] The ring gear 13 is locked, the engine 3 is turned off, the motor 4 is working in the power generation state, the first clutch unit 6 is connected, and the second clutch unit 8 is disconnected.

[0110] As shown in the figure, the power transmission path is: the front differential 7 drives the planet carrier 14 to rotate, and the planet carrier 14 transmits the power to the motor 4 through the sun gear 11, and the motor 4 works to generate electricity.

[0111] Figure 8 At this time, the motor 4 is reversely driven to generate electricity, and the kinetic energy of the front differential 7 is converted into electrical energy and fed back to the vehicle-mounted energy storage battery.

[0112] In summary, the hybrid power system of the present application utilizes the planetary gear train 1 transmission and realizes timely four-wheel drive, and also omits the special power distribution components such as the split device, thereby simplifying the overall structure and reducing the production cost.

[0113] In some embodiments of the present application, as shown in the figure, the hybrid power system comprises a transmission shaft 101, one end of the transmission shaft 101 is connected in transmission with the motor 4, and the other end of the transmission shaft 101 is connected in transmission with the sun gear 11.

[0114] In some embodiments of the present application, as shown in the figure, the hybrid power system comprises a transmission shaft 101, one end of the transmission shaft 101 is connected in transmission with the motor 4, and the other end of the transmission shaft 101 is connected in transmission with the sun gear 11. Figure 1

[0115] ​​It can be understood that one end of the transmission shaft 101 is in transmission connection with the motor 4, and the other end of the transmission shaft 101 is in transmission connection with the sun gear 11, which is conducive to driving the motor 4 to rotate by the sun gear 11 through the transmission shaft 101, and is also conducive to driving the sun gear 11 to rotate by the motor 4 through the transmission shaft 101, so that power transmission can be realized. At the same time, the transmission shaft 101 is also conducive to forming a relatively far distance between the motor 4 and the sun gear 11, so as to reduce the interference with the components of the planetary gear train 1.

[0116] In the embodiment of the application, the transmission shaft 101 and the sun gear 11 can be in transmission connection through key connection, welding or the like.

[0117] In the embodiment of the application, the transmission shaft 101 and the motor 4 can be in transmission connection through gear meshing.

[0118] In some embodiments of the application, as shown in Figure 1 The hybrid power system includes an extension part 102, the extension part 102 is in transmission connection with the ring gear 13 and the second output shaft 5, and the ring gear 13 and the second output shaft 5 are spaced apart along the radial direction of the second output shaft 5.

[0119] It can be understood that since the front differential 7 and the rear differential 9 are relatively far apart, and the first output shaft 2 and the second output shaft 5 need to be in transmission connection with the planetary gear train 1 at the same time, arranging the extension part 102 is conducive to extending the transmission path of the ring gear 13 and the second output shaft 5, so that the planetary gear train 1 can be in transmission with the first output shaft 2 and the second output shaft 5 at the same time without using a large volume structure.

[0120] In the embodiment of the application, the ring gear 13 can drive the extension part 102 to rotate, so that the extension part 102 drives the second output shaft 5 to rotate, so as to realize transmission.

[0121] In some embodiments of the application, as shown in Figure 1 The extension part 102 includes a first sprocket 1021, a second sprocket 1022 and a transmission chain 1023, the first sprocket 1021 is in transmission connection with the ring gear 13, the second sprocket 1022 is in transmission connection with the second output shaft 5, and the transmission chain 1023 covers the outer side of the first sprocket 1021 and the outer side of the second sprocket 1022.

[0122] It can be understood that the first sprocket 1021 can be driven by the ring gear 13 to rotate, and the rotating first sprocket 1021 drives the second sprocket 1022 to rotate through the transmission chain 1023, so as to realize power transmission.

[0123] In the embodiment of the application, the first sprocket 1021 and the ring gear 13 can be in transmission connection through key connection, welding or the like.

[0124] In the embodiment of the present application, the second sprocket 1022 can be connected in transmission with the second output shaft 5 by means of key connection, welding, etc.

[0125] In the embodiment of the present application, the transmission chain 1023 can be chain type or steel belt type.

[0126] In the embodiment of the present application, the number of teeth of the first sprocket 1021 is greater than that of the second sprocket 1022, so that the effect of speed reduction and torque increase can be achieved, which is conducive to increasing the torque of the power transmitted by the transmission cylinder 15 to the second output shaft 5.

[0127] In some embodiments of the present application, as shown in Figure 1 The planetary gear train 1 includes a transmission cylinder 15, which is located on the side opposite to the ring gear 13 and the carrier 14, and is connected in transmission with the ring gear 13. The first sprocket 1021 is sleeved on the outside of the transmission cylinder 15 and is connected in transmission with the transmission cylinder 15. The transmission shaft 101 passes through the hollow part of the transmission cylinder 15.

[0128] It can be understood that the transmission cylinder 15 can transmit power from the ring gear 13 and the engine 3, and can also support the transmission shaft 101, which is conducive to the rotation of the transmission shaft 101 to transmit power. The transmission cylinder 15 is located on the side opposite to the ring gear 13 and the carrier 14, which can reduce the interference between the transmission cylinder 15 and the carrier 14 or other components of the planetary gear train 1.

[0129] In the embodiment of the present application, the transmission cylinder 15 and the ring gear 13 can be connected in transmission by welding or other methods, or can be connected in transmission by an integral molding process.

[0130] In the embodiment of the present application, the transmission shaft 101 and the transmission cylinder 15 can be connected by a bearing, so that the transmission shaft 101 and the transmission cylinder 15 can rotate relatively.

[0131] In some embodiments of the present application, as shown in Figure 1 The hybrid power system includes a torsional damper 103, the engine 3 includes an input shaft 31, and the torsional damper 103 is sleeved on the input shaft 31. The input shaft 31 is connected in transmission with the transmission cylinder 15.

[0132] It can be understood that the torsional damper 103 can reduce the vibration generated by the engine 3 during operation, which is conducive to maintaining a relatively stable working state of the input shaft 31.

[0133] In some embodiments of the present application, as shown in Figure 1As shown in the figure, the hybrid system comprises a first input gear 32, the planetary gear train 1 comprises a first output gear 16, the first input gear 32 is sleeved on the input shaft 31 and is in transmission connection with the input shaft 31, the first output gear 16 is fixed on the transmission cylinder 15, and the first input gear 32 is in meshing connection with the first output gear 16.

[0134] It can be understood that the first input gear 32 can be driven to rotate by the input shaft 31, the rotating first input gear 32 drives the first output gear 16 to rotate, and further drives the transmission cylinder 15 to rotate, so as to realize power transmission.

[0135] In the embodiment of the application, the first output gear 16 can be fixed on the transmission cylinder 15 by means of key connection, welding or the like.

[0136] In the embodiment of the application, the number of teeth of the first input gear 32 is less than the number of teeth of the first output gear 16, so that the effect of speed reduction and torque increase can be realized, which is beneficial to increasing the torque of the power transmitted by the engine 3 to the transmission cylinder 15.

[0137] In some embodiments of the application, the first output shaft 2 is collinear with the second output shaft 5.

[0138] It can be understood that the first output shaft 2 and the second output shaft 5 are arranged in a collinear manner, so as to be beneficial to improving the stability of the power output by the first output shaft 2 to the front wheels and the power output by the second output shaft 5 to the rear wheels.

[0139] In some embodiments of the application, as shown in the figure, Figure 1 the first output shaft 2 is parallel to the second output shaft 5.

[0140] In some embodiments of the application, as shown in the figure, Figure 1 the planetary gear train 1 comprises a second input gear 17, the second input gear 17 is in transmission connection with the planet carrier 14, the first output shaft 2 has a second output gear 21, and the second input gear 17 is in meshing connection with the second output gear 21.

[0141] It can be understood that the planet carrier 14 can drive the second input gear 17 to rotate, the second input gear 17 can drive the first output shaft 2 to rotate through the second output gear 21, so as to realize power transmission.

[0142] In the embodiment of the application, the planet carrier 14 and the second input gear 17 can be in transmission connection by means of key connection, welding or the like.

[0143] In the embodiment of the application, the first output shaft 2 and the second output gear 21 can be in transmission connection by means of key connection, welding or the like.

[0144] The second aspect of the present application provides a control method of a hybrid power system, the control method comprising:

[0145] controlling the engine, the motor, the planetary gear train, the first clutch unit and the second clutch unit to enable the hybrid power system to enter any one of a pure electric mode, an engine-only drive mode one, an engine-only drive mode two, an engine-only drive mode three, a hybrid drive mode, a vehicle charging mode and a regenerative braking mode, wherein

[0146] In the pure electric mode, the ring gear is locked, the engine is turned off, the motor operates in a driving state, the first clutch unit is engaged, and the second clutch unit is disengaged.

[0147] In the engine-only drive mode one, the sun gear is locked, the engine operates, the motor is turned off, the first clutch unit is engaged, and the second clutch unit is disengaged.

[0148] In the engine-only drive mode two, the sun gear is locked, the engine operates, the motor is turned off, the first clutch unit is disengaged, and the second clutch unit is engaged.

[0149] In the engine-only drive mode three, the sun gear is locked, the engine operates, the motor is turned off, the first clutch unit is engaged, and the second clutch unit is engaged.

[0150] In the hybrid drive mode, the carrier is locked, the engine operates, the motor operates in a driving state, the first clutch unit is disengaged, and the second clutch unit is engaged.

[0151] In the vehicle charging mode, the carrier is locked, the engine operates, the motor operates in a power generation state, the first clutch unit is disengaged, and the second clutch unit is engaged.

[0152] In the regenerative braking mode, the engine is turned off, the motor operates in a power generation state, the first clutch unit is engaged, and the second clutch unit is disengaged.

[0153] It can be understood that, due to the hybrid power system of the above-mentioned embodiment, the automobile of the present application has the same technical effects as the above-mentioned embodiment, which will not be repeated here.

[0154] In the pure electric mode, the ring gear 13 is locked, the engine 3 is turned off, the motor 4 operates in a driving state, the first clutch unit 6 is engaged, and the second clutch unit 8 is disengaged. As shown in FIG. 1, the sun gear 2 is locked, the carrier 5 is locked, and the motor 4 operates in a driving state. Figure 2As shown, the power transmission path is: the motor 4 generates power, and transmits to the sun gear 11, the sun gear 11 drives the planet carrier 14 to rotate, and transmits to the first output shaft 2, the first output shaft 2 drives the front wheel differential 7 to rotate. The current mode is suitable for vehicle starting, congested road driving and other low-speed running occasions.

[0155] In the second engine 3 driving mode, the sun gear 11 is locked, the engine 3 works, the motor 4 is closed, the first clutch unit 6 is disconnected, and the second clutch unit 8 is connected. As shown, Figure 3 As shown, the power transmission path is: the power generated by the engine 3 is transmitted to the ring gear 13, the ring gear 13 drives the planet carrier 14 to rotate, and transmits the power to the first output shaft 2, the first output shaft 2 drives the front wheel differential 7 to rotate. At this time, the vehicle is in the front two-wheel drive state.

[0156] In the second engine 3 driving mode, the sun gear 11 is locked, the engine 3 works, the motor 4 is closed, the first clutch unit 6 is disconnected, and the second clutch unit 8 is connected. As shown, Figure 4 As shown, the power transmission path is: the power generated by the engine 3 is transmitted to the ring gear 13, the ring gear 13 drives the planet carrier 14 to rotate, and transmits the power to the first output shaft 2, the first output shaft 2 drives the front wheel differential 7 to rotate. At this time, the vehicle is in the front two-wheel drive state.

[0157] In the third engine 3 driving mode, the sun gear 11 is locked, the engine 3 works, the motor 4 is closed, the first clutch unit 6 is connected, and the second clutch unit 8 is connected. As shown, Figure 5 As shown, the power transmission path has two paths: a, the power generated by the engine 3 is transmitted to the ring gear 13, the ring gear 13 drives the planet carrier 14 to rotate, and transmits the power to the first output shaft 2, the first output shaft 2 drives the front wheel differential 7 to rotate. b, the power generated by the engine 3 is transmitted to the ring gear 13, the ring gear 13 drives the second output shaft 5 to rotate, and transmits the power to the second output shaft 5, the second output shaft 5 drives the rear wheel differential 9 to rotate.

[0158] In the hybrid driving mode, the planet carrier 14 is locked, the engine 3 works, the motor 4 works in the driving state, the first clutch unit 6 is disconnected, and the second clutch unit 8 is connected. As shown, Figure 6 As shown, the power output path has two paths: a, the power generated by the motor 4 is transmitted to the sun gear 11, the sun gear 11 drives the ring gear 13 to rotate, and transmits the power to the second output shaft 5, the second output shaft 5 drives the rear wheel differential 9 to rotate. b, the power generated by the engine 3 drives the ring gear 13 to rotate, the ring gear 13 transmits the power to the second output shaft 5, and the second output shaft 5 drives the rear wheel differential 9 to rotate. At this time, the vehicle is in the rear two-wheel drive state.

[0159] In the embodiment of the application, in the driving mode, the planet carrier 14 is locked, the engine 3 works, the motor 4 works in the state of generating electricity, the first clutch unit 6 is disconnected, and the second clutch unit 8 is connected. As shown in the figure, there are two power transmission paths: a, the power generated by the engine 3 drives the gear ring 13 to rotate, the gear ring 13 transmits the power to the second output shaft 5, and the second output shaft 5 drives the rear differential 9 to rotate. b, the power generated by the engine 3 drives the gear ring 13 to rotate, the gear ring 13 transmits the power to the sun gear 11, and the sun gear 11 drives the generator 4 to work to generate electricity. At this time, the vehicle is in the rear-wheel two-drive state, and the motor 4 is reversely dragged to generate electricity. Figure 7

[0160] In the embodiment of the application, in the regenerative braking mode, the gear ring 13 is locked, the engine 3 is closed, the motor 4 works in the state of generating electricity, the first clutch unit 6 is connected, and the second clutch unit 8 is disconnected. As shown in the figure, the power transmission path is: the front differential 7 drives the planet carrier 14 to rotate, the planet carrier 14 transmits the power to the motor 4 through the sun gear 11, and the motor 4 works to generate electricity. At this time, the motor 4 is reversely dragged to generate electricity, and the kinetic energy of the front differential 7 is converted into electric energy and fed back to the vehicle-mounted energy storage battery. Figure 8

[0161] The third aspect of the application provides an automobile, which comprises the hybrid power system of the above-mentioned embodiment.

[0162] It can be understood that, due to the control method of the hybrid power system of the above-mentioned embodiment, the automobile of the application has the same technical effects as the above-mentioned embodiment, which will not be described here.

[0163] In the embodiment of the application, the front wheels are installed on both sides of the front differential, and the rear wheels are installed on both sides of the rear differential.

[0164] In the embodiment of the application, the real-time slip rates of the front wheels and the rear wheels can be used to determine the states of the first output shaft and the second output shaft, so as to select the appropriate working mode. In this way, the conversion of the above-mentioned seven working modes can be realized, so as to improve the passability of the vehicle.

[0165] When the front wheels slip, the vehicle can enter the engine-only driving mode or the hybrid driving mode, so as to realize the purpose of vehicle escape. Similarly, when the rear wheels slip, the vehicle can also realize the purpose of vehicle escape through the switching of the running mode.

[0166] In the application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. The term "a plurality of" refers to two or more, unless otherwise explicitly limited.

[0167] ​​Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the application cover any and all variations of the application that come within the scope of the

[0168] It is understood that the application is not limited to the precise construction herein disclosed and shown in the drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the claims that follow.

Claims

1. A hybrid system characterized by comprising: The hybrid system comprises a planetary gear train (1), a first output shaft (2), an engine (3), an electric motor (4), a second output shaft (5), a first clutch unit (6), a front differential (7), a second clutch unit (8) and a rear differential (9), wherein, The planetary gear train (1) comprises a sun gear (11), a planet gear (12), a ring gear (13) and a planet carrier (14), the sun gear (11), the planet gear (12) and the ring gear (13) are in meshing sequence, and the planet carrier (14) is drivingly connected with the planet gear (12) and the first output shaft (2); The engine (3) is drivingly connected with the ring gear (13); The electric motor (4) is drivingly connected with the sun gear (11); The second output shaft (5) is drivingly connected with the ring gear (13); The first clutch unit (6) connects the first output shaft (2) and the front differential (7); The second clutch unit (8) connects the second output shaft (5) and the rear differential (9); The hybrid system comprises a transmission shaft (101), one end of the transmission shaft (101) is drivingly connected with the electric motor (4), and the other end of the transmission shaft (101) is drivingly connected with the sun gear (11); The hybrid system comprises an extension part (102), the extension part (102) drivingly connects the ring gear (13) and the second output shaft (5), and the ring gear (13) and the second output shaft (5) are spaced apart along the radial direction of the second output shaft (5); The extension part (102) comprises a first sprocket (1021), a second sprocket (1022) and a transmission chain (1023), the first sprocket (1021) is drivingly connected with the ring gear (13), the second sprocket (1022) is drivingly connected with the second output shaft (5), and the transmission chain (1023) covers the outer sides of the first sprocket (1021) and the second sprocket (1022); The planetary gear train (1) comprises a transmission cylinder (15), the transmission cylinder (15) is located on the side opposite to the planet carrier (14) of the ring gear (13) and is drivingly connected with the ring gear (13), the first sprocket (1021) is sleeved on the outer side of the transmission cylinder (15) and is drivingly connected with the transmission cylinder (15), and the transmission shaft (101) passes through the hollow part of the transmission cylinder (15); The hybrid system comprises a torsional vibration damper (103), the engine (3) comprises an input shaft (31), the torsional vibration damper (103) is sleeved on the input shaft (31), and the input shaft (31) is drivingly connected with the transmission cylinder (15); The hybrid system comprises a first input gear (32), the planetary gear train (1) comprises a first output gear (16), the first input gear (32) is sleeved on the input shaft (31) and is in transmission connection with the input shaft (31), the first output gear (16) is fixed on the transmission cylinder (15), and the first input gear (32) is in meshing connection with the first output gear (16).

2. The hybrid system according to claim 1, characterized by The planetary gear train (1) comprises a second input gear (17), the second input gear (17) is in transmission connection with the planet carrier (14), the first output shaft (2) has a second output gear (21), and the second input gear (17) is in meshing connection with the second output gear (21).

3. A control method of a hybrid system characterized by comprising: The control method of the hybrid system is applied to the hybrid system according to any one of claims 1 to 2, and the control method comprises: controlling the engine (3), the motor (4), the planetary gear train (1), the first clutch unit (6) and the second clutch unit (8) to enable the hybrid system to enter any one of a pure electric mode, an engine (3) only driving mode one, an engine (3) only driving mode two, an engine (3) only driving mode three, a hybrid driving mode, a driving charging mode and a regenerative braking mode, wherein in the pure electric mode, the ring gear (13) is locked, the engine (3) is turned off, the motor (4) works in a driving state, the first clutch unit (6) is combined, and the second clutch unit (8) is disconnected; in the engine (3) only driving mode one, the sun gear (11) is locked, the engine (3) works, the motor (4) is turned off, the first clutch unit (6) is combined, and the second clutch unit (8) is disconnected; in the engine (3) only driving mode two, the sun gear (11) is locked, the engine (3) works, the motor (4) is turned off, the first clutch unit (6) is disconnected, and the second clutch unit (8) is combined; in the engine (3) only driving mode three, the sun gear (11) is locked, the engine (3) works, the motor (4) is turned off, the first clutch unit (6) is combined, and the second clutch unit (8) is combined; in the hybrid driving mode, the planet carrier (14) is locked, the engine (3) works, the motor (4) works in a driving state, the first clutch unit (6) is disconnected, and the second clutch unit (8) is combined; in the driving charging mode, the planet carrier (14) is locked, the engine (3) works, the motor (4) works in a power generation state, the first clutch unit (6) is disconnected, and the second clutch unit (8) is combined; in the regenerative braking mode, the engine (3) is turned off, the motor (4) works in a power generation state, the first clutch unit (6) is combined, and the second clutch unit (8) is disconnected.

4. An automobile characterized by comprising: The automobile comprises the control method of the hybrid system according to claim 3.

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