Vehicle transmission and hybrid power system

Abstract

The invention relates to the technical field of vehicles, in particular to a vehicle transmission and a hybrid power system.The vehicle transmission comprises a differential gear device, the differential gear device comprises a first component, a second component and a third component which are in transmission connection, the differential gear device is a planetary gear set, and the planetary gear set comprises a sun gear, a planet carrier and a gear ring; the first part is one of a planet carrier and a sun gear, the second part is the other one of the planet carrier and the sun gear, the third part is a gear ring, the first part is connected with an engine, and the third part is connected with an output shaft; the first torque transmission mechanism is configured to enable the second component to be in selective transmission connection with the first motor, and the first torque transmission mechanism is further configured to enable the engine to be in selective transmission connection with the first motor; and the second torque transmission mechanism is configured to selectively connect the engine with the output shaft in a transmission manner. According to the invention, the vehicle can meet the performance required in different working modes.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle technology, and in particular to a vehicle transmission and a hybrid power system. Background Art

[0002] The sales of hybrid vehicles are increasing rapidly in the market due to their high fuel efficiency and good maneuverability. Hybrid vehicles have a hybrid power system, which usually includes an electric motor and a hybrid transmission (DHT). The choice of the hybrid system has a profound positive impact on the performance characteristics of the vehicle.

[0003] According to the number of motors, hybrid systems can be roughly divided into single motor type, dual motor type and multi-motor type, among which dual motor type is becoming more and more common. One motor is used as a drive motor to drive the vehicle, and the other motor is used as a generator to convert the engine's mechanical energy into electrical energy to charge the vehicle battery, and the battery's power is supplied to the drive motor. During the operation of the vehicle, when the battery SOC is low, the engine can run in parallel with the drive motor, charging the battery through the generator and / or directly providing energy to the drive motor.

[0004] Therefore, the engine can operate within its most efficient operating range, thereby achieving the best fuel economy state. In addition, when the drive motor is insufficient due to low battery SOC or close to the physical limit, the engine can also be used to directly provide driving force to the wheels. Since the drive motor can compensate for torque during the gear shifting process, the number of gears in the hybrid transmission can be greatly reduced, thereby reducing the weight, complexity and cost of the transmission system. However, due to the greatly reduced number of gears in the hybrid power transmission, the engine cannot be used at very low vehicle speeds and is usually driven only by the drive motor. Under conditions requiring a large amount of continuous driving energy, especially under high load, trailer use, high road slope conditions, etc., the battery SOC is very low under these conditions, and the performance is limited if only the drive motor is driven, or the engine can be used for driving, but due to the gear limitations of the hybrid transmission, the performance is not as good as the drive motor, and it gives customers a feeling of reduced performance. Summary of the invention

[0005] In order to solve the above technical problems, the present disclosure provides a vehicle transmission and a hybrid power system, so that the vehicle can meet the performance required in different working modes.

[0006] In a first aspect, an embodiment of the present disclosure provides a vehicle transmission, comprising: a differential gear device, the differential gear device comprising a first component, a second component and a third component that are transmission-connected, the differential gear device being a planetary gear set, the planetary gear set comprising a sun gear, a planet carrier and a ring gear; the first component being one of the planet carrier and the sun gear, the second component being the other of the planet carrier and the sun gear, the third component being the ring gear, the first component being connected to the engine, and the third component being connected to the output shaft; a first torque transmission mechanism, the first torque transmission mechanism being configured to selectively transmission-connect the second component to the first motor, and the first torque transmission mechanism being further configured to selectively transmission-connect the engine to the first motor; a second torque transmission mechanism, the second torque transmission mechanism being configured to selectively transmission-connect the engine to the output shaft.

[0007] In some embodiments, the vehicle transmission also includes a first gear set and a second gear set; the first torque transmission mechanism is configured to selectively transmit the first motor to the second component by combining with the first gear set, and the first gear set is connected to the second component, and the first torque transmission mechanism is also configured to selectively transmit the engine to the first motor by combining with the second gear set, and the second gear set is connected to the first component.

[0008] In some embodiments, the vehicle transmission also includes a third gear set, a fourth gear set and a fifth gear set; the second torque transmission mechanism is configured to selectively connect the engine to the output shaft by combining with the third gear set, and the third gear set is connected to the first component; the fourth gear set is connected between the second motor and the output shaft; the fifth gear set is connected between the third component and the output shaft.

[0009] In some embodiments, the vehicle transmission also includes a first gear set, a second gear set, a third gear set, a fourth gear set, a fifth gear set, a first transmission shaft, a second transmission shaft, a third transmission shaft and a fourth transmission shaft; the first transmission shaft is connected to the first motor and the first torque transmission mechanism, the first gear set is selectively connected to the first transmission shaft through the first torque transmission mechanism, the first gear set is connected to the second component, the second gear set is selectively connected to the first transmission shaft through the first torque transmission mechanism, and the second gear set is connected to the second transmission shaft; the second transmission shaft is connected to the engine and the first component, and the third gear set is connected to the second transmission shaft; the third transmission shaft is connected to the second torque transmission mechanism and the third gear set, and the third transmission shaft is selectively connected to the output shaft through the second torque transmission mechanism; the output shaft is connected to the fifth gear set, the fifth gear set is connected to the third component, the output shaft is connected to the fourth gear set, the fourth gear set is connected to the fourth transmission shaft, and the fourth transmission shaft is connected to the second motor.

[0010] In a second aspect, the present disclosure further provides a hybrid power system, including an engine, a first motor, a second motor and a transmission, wherein the transmission is a vehicle transmission provided by the present disclosure.

[0011] In some embodiments, the hybrid power system realizes different working modes by controlling the switching of the working states of the first torque transmitting mechanism and the second torque transmitting mechanism, and the working modes include a high load mode, a series mode and a parallel mode.

[0012] In some embodiments, in the high load mode, the first torque transmission mechanism controls the second component to be connected to the first motor, the first torque transmission mechanism controls the engine to be disconnected from the first motor, and the second torque transmission mechanism controls the engine to be disconnected from the output shaft.

[0013] In some embodiments, the high load mode includes a low speed high load mode and a high speed high load mode;

[0014] In the low speed and high load mode, the first motor rotates forward;

[0015] In the high speed and high load mode, the first motor rotates in the negative direction.

[0016] In some embodiments, in the series mode, the first torque transmission mechanism controls the second component to be disconnected from the first motor, the first torque transmission mechanism controls the engine to be connected to the first motor, and the second torque transmission mechanism controls the engine to be disconnected from the output shaft.

[0017] In some embodiments, in the parallel mode, the first torque transmission mechanism controls the second component to be disconnected from the first motor, the first torque transmission mechanism controls the engine to be disconnected from the first motor, and the second torque transmission mechanism controls the engine to be connected to the output shaft.

[0018] Compared with the prior art, the technical solution provided by the present invention has the following advantages:

[0019] The vehicle transmission provided by the present disclosure can realize the performance required by the vehicle in different working modes through the differential gear device, the first torque transmission mechanism and the second torque transmission mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 is a schematic diagram of a hybrid power system with a vehicle transmission provided by the present disclosure;

[0023] Figure 2 is a schematic diagram of another hybrid power system structure with a vehicle transmission provided by the present disclosure;

[0024] Figure 3 yes Figure 2 A schematic diagram of a hybrid power system with a vehicle transmission;

[0025] Figure 4 is a structural schematic diagram of another hybrid power system with a vehicle transmission provided by the present disclosure;

[0026] Figure 5 is a schematic diagram of another hybrid power system with a vehicle transmission provided by the present disclosure;

[0027] Figure 6 is a schematic diagram of an operation of a vehicle having a hybrid power system provided by the present disclosure in a low speed and high load mode;

[0028] Figure 7 is a schematic diagram of an operation of a vehicle having a hybrid power system provided by the present disclosure in a high-speed and high-load mode;

[0029] Figure 8 is a schematic diagram of an operation of a vehicle having a hybrid power system provided by the present disclosure in a series mode;

[0030] Fig. 9 It is a schematic diagram of the operation of a vehicle having the hybrid power system provided by the present invention in a parallel mode. DETAILED DESCRIPTION

[0031] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0033] Figure 1 is a schematic diagram of a hybrid power system with a vehicle transmission provided by the present disclosure, with reference to Figure 1 , this embodiment provides a vehicle transmission, the vehicle transmission comprising:

[0034] The differential gear device 10 includes a first component 11, a second component 12, and a third component 13 that are transmission-connected. The differential gear device 10 is a planetary gear set, and the planetary gear set includes a sun gear S, a planet carrier C, and a ring gear R. The first component 11 is one of the planet carrier C and the sun gear S, the second component 12 is the other of the planet carrier C and the sun gear S, and the third component 13 is the ring gear R. The first component 11 is connected to the engine Engine, and the third component 13 is connected to the output shaft 70.

[0035] A first torque transmission mechanism 20 , the first torque transmission mechanism 20 is configured to selectively transmit and connect the second component 12 with the first motor MG1 , and the first torque transmission mechanism 20 is also configured to selectively transmit and connect the engine Engine with the first motor MG1 ;

[0036] The second torque transmitting mechanism 30 is configured to selectively transmit and connect the engine Engine to the output shaft 70 .

[0037] Specifically, the present embodiment provides a vehicle transmission, which includes a differential gear device 10, a first torque transmission mechanism 20, and a second torque transmission mechanism 30. The differential gear device 10 includes a first component 11, a second component 12, and a third component 13. The first component C is connected to the engine Engine, and the third component R is connected to the output shaft 70. The differential gear device 10 can be a planetary gear set, the first component 11 is one of the planet carrier C and the sun gear S, the second component 12 is the other of the planet carrier C and the sun gear S, and the third component 13 is the ring gear R. That is, when the first component 11 is the planet carrier C, the second component 12 is the sun gear S, and when the first component 11 is the sun gear S, the second component 12 is the planet carrier C.

[0038] The first torque transmission mechanism 20 is configured to selectively transmit and connect the second component 12 with the first motor MG1, and the first torque transmission mechanism 20 is also configured to selectively transmit and connect the engine Engine with the first motor MG1, that is, the second component 12 can be controlled to be disconnected or connected with the first motor MG1 by the first torque transmission mechanism 20, and the engine Engine can be controlled to be disconnected or connected with the first motor MG1 by the first torque transmission mechanism 20. The second torque transmission mechanism 30 is configured to selectively transmit and connect the engine Engine with the output shaft 70, that is, the engine Engine can be controlled to be disconnected or connected with the output shaft 70 by the second torque transmission mechanism 30. Therefore, the vehicle can meet the performance required in different working modes through the differential gear device 10, the first torque transmission mechanism 20 and the second torque transmission mechanism 30.

[0039] Optionally, the first motor MG1 and the second motor MG2 are both connected to a battery. The first motor MG1 and the second motor MG2 both have the functions of generating electricity and motoring.

[0040] Optionally, the first torque transmission mechanism 20 and the second torque transmission mechanism 30 may be clutches. Thus, the second component 12 and the first motor MG1 may be connected or disconnected through the first torque transmission mechanism 20, and the engine Engine may be connected or disconnected through the first torque transmission mechanism 20 and the first motor MG1 may be connected or disconnected through the first torque transmission mechanism 20. Thus, the engine Engine may be connected or disconnected through the second torque transmission mechanism 30 and the output shaft 70. Optionally, the first torque transmission mechanism 20 and the second torque transmission mechanism 30 may be dog clutches.

[0041] Figure 2 is a schematic diagram of another hybrid power system with a vehicle transmission provided by the present disclosure, Figure 3 yes Figure 2 A schematic diagram of a hybrid power system with a vehicle transmission, see Figure 2 and Figure 3 , in some optional embodiments, the vehicle transmission further includes a first gear set 40 and a second gear set 50;

[0042] The first torque transmission mechanism 20 is configured to selectively transmit and connect the first motor MG1 to the second component 12 by combining with the first gear set 40, the first gear set 40 is connected to the second component 12, and the first torque transmission mechanism 20 is also configured to selectively transmit and connect the engine Engine to the first motor MG1 by combining with the second gear set 50, the second gear set 50 is connected to the first component 11. That is, the first gear set 40 can be disconnected or connected to the first motor MG1 by the first torque transmission mechanism 20, and the second gear set 50 can be disconnected or connected to the first motor MG1 by the first torque transmission mechanism 20.

[0043] refer to Figure 2 and Figure 3 In some optional embodiments, the first gear set 40 includes a first gear 41 and a second gear 42 connected to each other, and the first torque transmission mechanism 20 is configured to selectively transmit and connect the first gear 41 to the first motor MG1, and the second gear 42 to the second component 12. That is, the first gear 41 can be disconnected or connected to the first motor MG1 through the first torque transmission mechanism 20, thereby realizing the disconnection or connection of the first gear set 40 to the first motor MG1 through the first torque transmission mechanism 20. The gear ratio of the first gear set 40 is the ratio of the number of gears of the first gear 41 to the number of gears of the second gear 42.

[0044] refer to Figure 2 and Figure 3 In some optional embodiments, the second gear set 50 includes a third gear 51 and a fourth gear 52 connected to each other, and the first torque transmission mechanism 20 is configured to selectively transmit the third gear 51 to the first motor MG1, and the fourth gear 52 is connected to the first component 11. That is, the third gear 51 can be disconnected or connected to the first motor MG1 through the first torque transmission mechanism 20, thereby realizing the disconnection or connection of the second gear set 50 to the first motor MG1 through the first torque transmission mechanism 20. The gear ratio of the second gear set 50 is the ratio of the number of gears of the third gear 51 to the number of gears of the fourth gear 52.

[0045] Figure 2 exemplarily shows that the first component 11 of the vehicle transmission is a planet carrier C, and the second component 12 is a sun gear S. In other embodiments of the present disclosure, reference Figure 4 , Figure 4 This is another schematic diagram of the structure of a hybrid power system with a vehicle transmission provided by the present disclosure. The first component 11 in the vehicle transmission can also be a sun gear S. In this case, the second component 12 is a planet carrier C.

[0046] Figure 5 is a schematic diagram of another hybrid power system with a vehicle transmission provided by the present disclosure, with reference to Figure 5 , in some embodiments, the vehicle transmission further includes a sixth gear set 100;

[0047] The first torque transmission mechanism 20 is configured to selectively drive-connect the first motor MG1 to the second member 12 by combining with the sixth gear set 100 , and the first torque transmission mechanism 20 is also configured to selectively drive-connect the engine Engine to the first motor MG1 by combining with the sixth gear set 100 .

[0048] That is, the sixth gear set 100 can be disconnected or connected with the second component 12 through the first torque transmitting mechanism 20 , and the sixth gear set 100 can be disconnected or connected with the engine Engine through the first torque transmitting mechanism 20 .

[0049] refer to Figure 2 and Figure 3 , in some optional embodiments, the vehicle transmission further includes a third gear set 60, a fourth gear set 80 and a fifth gear set 90;

[0050] The second torque transmission mechanism 30 is configured to selectively drive-connect the engine Engine to the output shaft 70 by combining with the third gear set 60 , and the third gear set 60 is connected to the first member 11 ;

[0051] The fourth gear set 80 is connected between the second motor MG2 and the output shaft 70;

[0052] The fifth gear set 90 is connected between the third member 13 and the output shaft 70 .

[0053] refer to Figure 2 and Figure 3 In some optional embodiments, the third gear set 60 includes a fourth gear 52 and a fifth gear 61 connected to each other, and the second torque transmission mechanism 30 is configured to selectively transmit and connect the fifth gear 61 to the output shaft 70. That is, the fifth gear 61 can be disconnected or connected to the output shaft 70 through the second torque transmission mechanism 30, thereby realizing the disconnection or connection of the third gear set 60 to the output shaft 70 through the second torque transmission mechanism 30.

[0054] refer to Figure 2 and Figure 3 In some optional embodiments, the fifth gear set 90 includes a sixth gear 91 and a seventh gear 92 connected to each other, the sixth gear 91 is connected to the third component 13, and the seventh gear 92 is connected to the output shaft 70.

[0055] Continue to refer Figure 2 and Figure 3 In some optional embodiments, the vehicle transmission further includes a first gear set 40, a second gear set 50, a third gear set 60, a fourth gear set 80, a fifth gear set 90, a first transmission shaft 111, a second transmission shaft 112, a third transmission shaft 113 and a fourth transmission shaft 114;

[0056] The first transmission shaft 111 is connected to the first motor MG1 and the first torque transmission mechanism 20, the first gear set 40 is selectively connected to the first transmission shaft 111 through the first torque transmission mechanism 20, the first gear set 40 is connected to the second component 12, the second gear set 50 is selectively connected to the first transmission shaft 111 through the first torque transmission mechanism 20, and the second gear set 50 is connected to the second transmission shaft 112;

[0057] The second transmission shaft 112 is connected to the engine Engine and the first component 11, and the third gear set 60 is connected to the second transmission shaft 112;

[0058] The third transmission shaft 113 is connected to the second torque transmission mechanism 30 and the third gear set 60 , and the third transmission shaft 113 is selectively transmission-connected to the output shaft 70 through the second torque transmission mechanism 30 ;

[0059] The output shaft 70 is connected to the fifth gear set 90 , the fifth gear set 90 is connected to the third member 13 , the output shaft 70 is connected to the fourth gear set 80 , the fourth gear set 80 is connected to the fourth transmission shaft 114 , and the fourth transmission shaft 114 is connected to the second motor MG2 .

[0060] Specifically, the first transmission shaft 111 is connected to the first motor MG1 and the first torque transmission mechanism 20, the first gear set 40 is selectively connected to the first transmission shaft 111 through the first torque transmission mechanism 20, the first gear set 40 is connected to the second component 12, and the first torque transmission mechanism 20 can control the selective transmission connection between the first gear set 40 and the first transmission shaft 111, so that the first torque transmission mechanism 20 can control the selective transmission connection between the second component 12 and the first motor MG1.

[0061] The first transmission shaft 111 is connected to the first motor MG1 and the first torque transmission mechanism 20, the second gear set 50 is selectively connected to the first transmission shaft 111 through the first torque transmission mechanism 20, the second gear set 50 is connected to the second transmission shaft 112, and the second transmission shaft 112 is connected to the engine Engine. The first torque transmission mechanism 20 can control the second gear set 50 to be selectively connected to the first transmission shaft 111, so that the first torque transmission mechanism 20 can control the engine Engine to be selectively connected to the first motor MG1.

[0062] The second transmission shaft 112 is connected to the engine Engine and the first component 11, the third gear set 60 is connected to the second transmission shaft 112, the third transmission shaft 113 is connected to the second torque transmission mechanism 30 and the third gear set 60, the third transmission shaft 113 is selectively connected to the output shaft 70 through the second torque transmission mechanism 30, the second torque transmission mechanism 30 can control the selective transmission connection between the third transmission shaft 113 and the output shaft 70, so that the second torque transmission mechanism 30 can control the selective transmission connection between the engine Engine and the output shaft 70.

[0063] refer to Figure 2 and Figure 3 Optionally, the output shaft 70 is connected to the output gear, the output gear is connected to the drive shaft, and the drive shaft is connected to the wheels, thereby realizing the driving of the vehicle.

[0064] It should be noted that Figure 1 , Figure 3 and Figure 5 Several configurations of the gear sets in the vehicle transmission are shown by way of example. In other embodiments of the present disclosure, the gear sets in the vehicle transmission may also be configured in other ways, and the gear ratios of the gear sets may be configured as required, which will not be described in detail in the present disclosure.

[0065] Continue to refer Figure 1 The present disclosure also provides a hybrid power system, including an engine Engine, a first motor MG1, a second motor MG2 and a transmission, wherein the transmission is a vehicle transmission provided by the present disclosure.

[0066] Specifically, the present disclosure further provides a hybrid power system, including an engine Engine, a first motor MG1, a second motor MG2, and a transmission, wherein the transmission is a vehicle transmission provided by the present disclosure.

[0067] The vehicle transmission includes a differential gear device 10, a first torque transmission mechanism 20 and a second torque transmission mechanism 30. The differential gear device 10 includes a first component 11, a second component 12 and a third component 13. The first component C is connected to the engine Engine, and the third component R is connected to the output shaft 70. The differential gear device 10 can be a planetary gear set, the first component 11 is one of the planet carrier C and the sun gear S, the second component 12 is the other of the planet carrier C and the sun gear S, and the third component 13 is the ring gear R. That is, when the first component 11 is the planet carrier C, the second component 12 is the sun gear S, and when the first component 11 is the sun gear S, the second component 12 is the planet carrier C.

[0068] The first torque transmission mechanism 20 is configured to selectively transmit and connect the second component 12 with the first motor MG1, and the first torque transmission mechanism 20 is also configured to selectively transmit and connect the engine Engine with the first motor MG1, that is, the second component 12 can be controlled to be disconnected or connected with the first motor MG1 by the first torque transmission mechanism 20, and the engine Engine can be controlled to be disconnected or connected with the first motor MG1 by the first torque transmission mechanism 20. The second torque transmission mechanism 30 is configured to selectively transmit and connect the engine Engine with the output shaft 70, that is, the engine Engine can be controlled to be disconnected or connected with the output shaft 70 by the second torque transmission mechanism 30. Therefore, the vehicle can meet the performance required in different working modes through the differential gear device 10, the first torque transmission mechanism 20 and the second torque transmission mechanism 30.

[0069] Continue to refer Figure 1 The hybrid system realizes different working modes by controlling the switching of the working states of the first torque transmission mechanism 20 and the second torque transmission mechanism 30 , and the working modes include a high load mode, a series mode and a parallel mode.

[0070] Specifically, the first torque transmission mechanism 20 can be used to control the second component 12 to be disconnected from or connected to the first motor MG1, and the first torque transmission mechanism 20 can be used to control the engine Engine to be disconnected from or connected to the first motor MG1, and the second torque transmission mechanism 30 can be used to control the engine Engine to be disconnected from or connected to the output shaft 70. Different working modes can be achieved by controlling the switching of the working states of the first torque transmission mechanism 20 and the second torque transmission mechanism 30, and the working modes include high load mode, series mode and parallel mode, and the vehicle can meet the performance required in different working modes.

[0071] Figure 6 is a schematic diagram of an operation of a vehicle having a hybrid power system provided by the present disclosure in a low speed and high load mode, Figure 7 is a schematic diagram of an operation of a vehicle having a hybrid power system provided by the present disclosure in a high-speed and high-load mode, Figure 8 is a schematic diagram of an operation of a vehicle having a hybrid power system provided by the present disclosure in a series mode, Fig. 9 is a schematic diagram of an operation of a vehicle having a hybrid power system provided by the present disclosure in a parallel mode, with reference to Figure 6-Figure 9 The working mode of the vehicle can be expressed in a variety of working modes according to the combination of the differential gear device 10, the first torque transmission mechanism 20 and the second torque transmission mechanism 30 in the vehicle transmission. The working mode of the vehicle may include a low speed high load mode, a high speed high load mode, a series mode and a parallel mode. Figure 6-Figure 9 The arrows in the middle correspond to the direction of power flow.

[0072] Hereinafter, a method according to an exemplary embodiment of the present invention will be described. Figure 6-Figure 9 working mode.

[0073] refer to Figure 6 and Figure 7 In some optional embodiments, in the high load mode, the first torque transmission mechanism 20 controls the second component 12 to be connected to the first motor MG1, and the first torque transmission mechanism 20 controls the engine Engine to be disconnected from the first motor MG1, and the second torque transmission mechanism 30 controls the engine Engine to be disconnected from the output shaft 70. At this time, part of the power of the engine Engine is converted into electrical energy, and the rest of the power of the engine Engine is transmitted to the output shaft 70. In this mode, the power flow can generate a higher continuous drive shaft torque, and when necessary, the engine Engine can continuously output the maximum power in a wider vehicle speed range, so as to meet the high load requirements of the vehicle without affecting the normal driving of the vehicle.

[0074] refer to Figure 6 and Figure 7 , in some embodiments, the high load mode includes a low speed high load mode and a high speed high load mode;

[0075] In the low speed and high load mode, the first motor MG1 rotates forward;

[0076] In the high speed and high load mode, the first motor MG1 rotates in reverse.

[0077] Specifically, refer to Figure 6 In the low-speed and high-load mode, the first motor MG1 rotates forward, part of the power of the engine Engine is converted into electrical energy through the first motor MG1, and the rest of the power of the engine Engine is transmitted to the output shaft 70. In this mode, the power flow can generate a higher continuous drive shaft torque when the vehicle speed is low. When necessary, the engine Engine can continuously output the maximum power in a wider range of low vehicle speeds, thereby meeting the high load requirements of the vehicle at low speeds without affecting the normal driving of the vehicle.

[0078] refer to Figure 7 In the high-speed and high-load mode, the first motor MG1 rotates in reverse, part of the power of the engine Engine is converted into electrical energy through the second motor MG2, and the rest of the power of the engine Engine is transmitted to the output shaft 70. In this mode, the power flow can generate a higher continuous drive shaft torque when the vehicle speed is high. When necessary, the engine Engine can continuously output the maximum power in a wider range of vehicle high speeds, thereby meeting the high-load requirements of the vehicle at high speeds without affecting the normal driving of the vehicle.

[0079] It should be noted that the low-speed and high-load mode can be selected when the vehicle speed is less than the first speed, and the high-speed and high-load mode can be selected when the vehicle speed is greater than or equal to the first speed, wherein the first speed can be set according to the specific test results of the vehicle, and the present disclosure does not make specific limitations on this.

[0080] refer to Figure 8 In some embodiments, in the series mode, the first torque transmission mechanism 20 controls the second component 12 to be disconnected from the first motor MG1, and the first torque transmission mechanism 20 controls the engine Engine to be connected to the first motor MG1, and the second torque transmission mechanism 30 controls the engine Engine to be disconnected from the output shaft 70. When the vehicle transmission includes a first gear set 40, a third gear set 60, and a fifth gear set 90, the first torque transmission mechanism 20 is further configured to selectively drive the first gear set 40 to the first motor MG1, the first gear set 40 is connected to the second component 12, the second torque transmission mechanism 30 is configured to selectively drive the third gear set 60 to the output shaft 70, the third gear set 60 is connected to the first component 11, and the fifth gear set 90 is connected between the third component 13 and the output shaft 70, at this time, the first gear set 40, the third gear set 60, and the fifth gear set 90 are idle. At this time, the power of the engine Engine is converted into electrical energy through the first motor MG1, and then transmitted to the second motor MG2, and finally transmitted to the output shaft 70. In this mode, the drive shaft torque and engine power can meet normal driving needs.

[0081] refer to Fig. 9 In some embodiments, in the parallel mode, the first torque transmission mechanism 20 controls the second component 12 to be disconnected from the first motor MG1, and the first torque transmission mechanism 20 controls the engine Engine to be disconnected from the first motor MG1, and the second torque transmission mechanism 30 controls the engine Engine to be connected to the output shaft 70. When the vehicle transmission includes a first gear set 40, a second gear set 50, and a fifth gear set 90, the first torque transmission mechanism 20 is configured to selectively drive the first gear set 40 to the first motor MG1, the first gear set 40 is connected to the second component 12, the first torque transmission mechanism 20 is further configured to selectively drive the second gear set 50 to the first motor MG1, the second gear set 50 is connected to the engine Engine, and the fifth gear set 90 is connected between the third component 13 and the output shaft 70, at this time, the first gear set 40, the second gear set 50, and the fifth gear set 90 are idle. At this time, the power of the engine Engine is directly transmitted to the output shaft 70. In this mode, the engine generates the continuous average power required for driving, and the second motor MG2 responds to the dynamic fluctuations that occur during driving. This mode has higher efficiency when driving on the highway.

[0082] The vehicle transmission in the hybrid system provided by the embodiment of the present disclosure can achieve the performance required by the vehicle in different working modes through the differential gear device 10, the first torque transmission mechanism 20 and the second torque transmission mechanism 30.

[0083] The above description is only a preferred embodiment of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of disclosure involved in the present disclosure is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present disclosure (but not limited to) by each other to form a technical solution.

[0084] In addition, although each operation is described in a specific order, this should not be understood as requiring these operations to be performed in the specific order shown or in a sequential order. Under certain circumstances, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present disclosure. Some features described in the context of a separate embodiment can also be implemented in a single embodiment in combination. On the contrary, the various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination mode.

[0085] Although the subject matter has been described in language specific to structural features and / or methodological logical actions, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. On the contrary, the specific features and actions described above are merely example forms of implementing the claims.

[0086] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vehicle transmission, characterized in that: include: A differential gear device, the differential gear device comprising a first component, a second component and a third component which are transmission-connected, the differential gear device is a planetary gear set, the planetary gear set comprises a sun gear, a planet carrier and a ring gear; the first component is one of the planet carrier and the sun gear, the second component is the other of the planet carrier and the sun gear, the third component is the ring gear, the first component is connected to an engine, and the third component is connected to an output shaft; a first torque transmission mechanism, the first torque transmission mechanism being configured to selectively transmission-connect the second member with the first motor, and the first torque transmission mechanism being further configured to selectively transmission-connect the engine with the first motor; A second torque transmitting mechanism is configured to selectively drive connect the engine with the output shaft.

2. The vehicle transmission according to claim 1, characterized in that: The vehicle transmission also includes a first gear set and a second gear set; The first torque transmission mechanism is configured to selectively transmit the first motor to the second component by combining with the first gear set, the first gear set is connected to the second component, and the first torque transmission mechanism is also configured to selectively transmit the engine to the first motor by combining with the second gear set, the second gear set is connected to the first component.

3. The vehicle transmission according to claim 1, characterized in that: The vehicle transmission also includes a third gear set, a fourth gear set, and a fifth gear set; The second torque transmission mechanism is configured to selectively drive connect the engine with the output shaft by engaging with the third gear set, the third gear set being connected with the first member; The fourth gear set is connected between the second motor and the output shaft; The fifth gear set is connected between the third member and the output shaft.

4. The vehicle transmission according to claim 1, characterized in that: The vehicle transmission also includes a first gear set, a second gear set, a third gear set, a fourth gear set, a fifth gear set, a first transmission shaft, a second transmission shaft, a third transmission shaft, and a fourth transmission shaft; The first transmission shaft is connected to the first motor and the first torque transmission mechanism, the first gear set is selectively connected to the first transmission shaft through the first torque transmission mechanism, the first gear set is connected to the second component, the second gear set is selectively connected to the first transmission shaft through the first torque transmission mechanism, and the second gear set is connected to the second transmission shaft; The second transmission shaft is connected to the engine and the first component, and the third gear set is connected to the second transmission shaft; The third transmission shaft is connected with the second torque transmission mechanism and the third gear set, and the third transmission shaft is selectively transmission-connected with the output shaft through the second torque transmission mechanism; The output shaft is connected to the fifth gear set, the fifth gear set is connected to the third component, the output shaft is connected to the fourth gear set, the fourth gear set is connected to the fourth transmission shaft, and the fourth transmission shaft is connected to the second motor.

5. A hybrid power system, characterized in that: It comprises an engine, a first motor, a second motor and a transmission, wherein the transmission is the vehicle transmission according to any one of claims 1-4.

6. The hybrid power system according to claim 5, characterized in that: The hybrid power system realizes different working modes by controlling the switching of the working states of the first torque transmission mechanism and the second torque transmission mechanism, and the working modes include a high load mode, a series mode and a parallel mode.

7. The hybrid power system according to claim 6, characterized in that: In the high load mode, the first torque transmission mechanism controls the second component to be connected to the first motor, the first torque transmission mechanism controls the engine to be disconnected from the first motor, and the second torque transmission mechanism controls the engine to be disconnected from the output shaft.

8. The hybrid power system according to claim 7, characterized in that: The high load mode includes a low speed high load mode and a high speed high load mode; In the low speed and high load mode, the first motor rotates forward; In the high speed and high load mode, the first motor rotates in the negative direction.

9. The hybrid power system according to claim 6, characterized in that: In the series mode, the first torque transmission mechanism controls the second component to be disconnected from the first motor, the first torque transmission mechanism controls the engine to be connected to the first motor, and the second torque transmission mechanism controls the engine to be disconnected from the output shaft.

10. The hybrid power system according to claim 6, characterized in that: In the parallel mode, the first torque transmission mechanism controls the second component to be disconnected from the first motor, the first torque transmission mechanism controls the engine to be disconnected from the first motor, and the second torque transmission mechanism controls the engine to be connected to the output shaft.

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