Vehicle transmission and hybrid system

Abstract

The present disclosure relates to the technical field of vehicles, and particularly relates to a vehicle transmission and hybrid power system, comprising: a differential gear device, the differential gear device comprising a first component, a second component and a third component in driving connection, 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 one of the planet carrier and the sun gear, and the third component being the ring gear; the first component being connected with an engine, and the third component being connected with an output shaft; a first torque transmission mechanism, the first torque transmission mechanism being configured to selectively drivingly connect the second component with a first motor, and the first torque transmission mechanism being further configured to selectively drivingly connect the engine with the first motor; and a second torque transmission mechanism, the second torque transmission mechanism being configured to selectively drivingly connect the engine with the output shaft. The present disclosure can realize that the vehicle meets the required performance in different working modes.

Description

TECHNICAL FIELD

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

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

[0003] According to the number of electric motors, the hybrid power system can be roughly divided into single motor type, double motor type and multi motor type, and the double motor type is becoming more and more common. One electric motor is used as a drive motor to drive the vehicle, and the other electric motor is used as a generator to convert the mechanical energy of the engine into electrical energy to charge the vehicle battery, and the battery supplies power to the drive motor. During the operation of the vehicle, when the battery SOC is low, the engine can operate in parallel with the drive motor, and the battery is charged through the generator and / or the drive motor is directly supplied with energy.

[0004] Therefore, the engine can operate in its most efficient operating range, thereby achieving the best fuel economy state. In addition, when the drive motor is insufficient in energy 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 perform torque compensation during gear shifting, the number of gears of the hybrid transmission can be greatly reduced, thereby reducing the weight, complexity and cost of the transmission system. However, due to the great reduction in the number of gears of the hybrid transmission, the engine cannot be used at very low vehicle speeds, and is usually driven only by the drive motor, and under conditions requiring a large amount of continuous driving energy, especially under high load, trailer use, high road slope working conditions, etc., the SOC of the battery is very low, and the performance of the drive motor is limited, or the engine can be used for driving, but due to the limitation of the gear position of the hybrid transmission, the performance is not as good as that of the drive motor, and the customer feels a decrease in performance. SUMMARY

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

[0006] In a first aspect, embodiments of the present disclosure provide a vehicle transmission, comprising: a differential gear device, the differential gear device comprising a first component, a second component and a third component connected in transmission, 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 an engine, the third component being connected to an output shaft; a first torque transmission mechanism, the first torque transmission mechanism being configured to selectively connect the second component and a first motor in transmission, and the first torque transmission mechanism being further configured to selectively connect the engine and the first motor in transmission; a second torque transmission mechanism, the second torque transmission mechanism being configured to selectively connect the engine and the output shaft in transmission.

[0007] In some embodiments, the vehicle transmission further comprises a first gear set and a second gear set; the first torque transmission mechanism is configured to selectively connect the first motor and the second component in transmission by combining with the first gear set, the first gear set being connected to the second component, and the first torque transmission mechanism is further configured to selectively connect the engine and the first motor in transmission by combining with the second gear set, the second gear set being connected to the first component.

[0008] In some embodiments, the vehicle transmission further comprises 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 and the output shaft in transmission by combining with the third gear set, the third gear set being connected to the first component; the fourth gear set being connected between a second motor and the output shaft; the fifth gear set being connected between the third component and the output shaft.

[0009] In some embodiments, the vehicle transmission further comprises 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 being connected to the first motor and the first torque transmission mechanism, the first gear set being selectively connected to the first transmission shaft in transmission by the first torque transmission mechanism, the first gear set being connected to the second component, the second gear set being selectively connected to the first transmission shaft in transmission by the first torque transmission mechanism, the second gear set being connected to the second transmission shaft; the second transmission shaft being connected to the engine and the first component, the third gear set being connected to the second transmission shaft; the third transmission shaft being connected to the second torque transmission mechanism and the third gear set, the third transmission shaft being selectively connected to the output shaft in transmission by the second torque transmission mechanism; the output shaft being connected to the fifth gear set, the fifth gear set being connected to the third component, the output shaft being connected to the fourth gear set, the fourth gear set being connected to the fourth transmission shaft, the fourth transmission shaft being connected to the second motor.

[0010] In a second aspect, the present disclosure provides a hybrid power system, comprising an engine, a first motor, a second motor and a transmission, wherein the transmission is the 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 transmission mechanism and the second torque transmission mechanism, the working modes including 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 with the first motor, and the first torque transmission mechanism controls the engine to be disconnected with the first motor, and the second torque transmission mechanism controls the engine to be disconnected with 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 high-load mode, the first motor rotates in the forward direction.

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

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

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

[0018] The technical solution provided by the present disclosure has the following advantages compared with the prior art:

[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 DRAWINGS

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

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

[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 with a vehicle transmission provided by the present disclosure;

[0024] Figure 3 is Figure 2 is a schematic diagram of a hybrid power system with a vehicle transmission provided by the present disclosure;

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

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

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

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

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

[0030] Figure 9 is a schematic diagram of a vehicle with a hybrid power system provided by the present disclosure in a parallel mode. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0032] In the following description, many specific details are set forth in order to fully understand the present disclosure, but the present disclosure can also be implemented in other different ways from those described herein; obviously, the embodiments in the specification are only some embodiments of the present disclosure, not all embodiments.

[0033] Figure 1 is a schematic diagram of a hybrid system with a vehicle transmission according to an embodiment of the present disclosure, referring to Figure 1 The embodiment provides a vehicle transmission, which comprises:

[0034] The differential gear device 10 comprises a first component 11, a second component 12 and a third component 13 which are connected in transmission, and the differential gear device 10 is a planetary gear set comprising 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 with the engine Engine, and the third component 13 is connected with the output shaft 70.

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

[0036] The second torque transmission mechanism 30 is configured to selectively connect the engine Engine with the output shaft 70 in transmission.

[0037] Specifically, the embodiment provides a vehicle transmission, which comprises a differential gear device 10, a first torque transmission mechanism 20 and a second torque transmission mechanism 30. The differential gear device 10 comprises a first component 11, a second component 12 and a third component 13. The first component C is connected with the engine Engine, and the third component R is connected with 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 connect the second component 12 with the first motor MGl, and the first torque transmission mechanism 20 is also configured to selectively connect the engine Engine with the first motor MGl, i.e. the second component 12 and the first motor MGl can be disconnected or connected by the first torque transmission mechanism 20, and the engine Engine and the first motor MGl can be disconnected or connected by the first torque transmission mechanism 20. The second torque transmission mechanism 30 is configured to selectively connect the engine Engine with the output shaft 70, i.e. the engine Engine and the output shaft 70 are disconnected or connected by the second torque transmission mechanism 30. Thus, the differential gear device 10, the first torque transmission mechanism 20 and the second torque transmission mechanism 30 can realize the performance required by the vehicle in different working modes.

[0039] Optionally, the first motor MGl and the second motor MG2 are connected with the battery. The first motor MGl and the second motor MG2 both have the functions of generating electricity and driving electricity.

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

[0041] Figure 2 is another structure schematic diagram of a hybrid power system with a vehicle transmission provided by the present disclosure, Figure 3 is Figure 2 is a principle schematic diagram of the hybrid power system with the vehicle transmission, referring to Figure 2 and Figure 3 In some optional embodiments, the vehicle transmission further comprises a first gear set 40 and a second gear set 50.

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

[0043] Referring to Figure 2 and Figure 3 In some alternative embodiments, the first gear set 40 comprises a first gear 41 and a second gear 42 connected in series, the first torque transmission mechanism 20 is configured to selectively connect the first gear 41 with the first motor MG1 and the second gear 42 with the first component 12. That is, the first gear set 40 can be disconnected or connected with 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] Referring to Figure 2 and Figure 3 In some alternative embodiments, the second gear set 50 comprises a third gear 51 and a fourth gear 52 connected in series, the first torque transmission mechanism 20 is configured to selectively connect the third gear 51 with the first motor MG1 and the fourth gear 52 with the first component 11. That is, the second gear set 50 can be disconnected or connected with 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 The first component 11 is a carrier C and the second component 12 is a sun gear S in the vehicle transmission as shown in the example in Figure 4 , Figure 4 is another schematic diagram of a hybrid power system structure provided by the present disclosure, in which the first component 11 in the vehicle transmission can also be a sun gear S, and in this case, the second component 12 is a carrier C.

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

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

[0048] That is, the sixth gear set 100 can be controlled to be disconnected or connected with the second member 12 by the first torque transmission mechanism 20, and the sixth gear set 100 can be controlled to be disconnected or connected with the engine Engine by the first torque transmission mechanism 20.

[0049] Referring to Figure 2 and Figure 3 In some alternative embodiments, the vehicle transmission further comprises 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 drivingly connect the engine Engine with the output shaft 70 by engaging with the third gear set 60, which is connected with 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] Referring to Figure 2 and Figure 3 In some alternative embodiments, the third gear set 60 comprises a fourth gear 52 and a fifth gear 61 connected with each other, and the second torque transmission mechanism 30 is configured to selectively drivingly connect the fifth gear 61 with the output shaft 70. That is, the fifth gear 61 can be disconnected or connected with the output shaft 70 by the second torque transmission mechanism 30, so as to disconnect or connect the third gear set 60 with the output shaft 70 by the second torque transmission mechanism 30.

[0054] Referring to Figure 2 and Figure 3 In some alternative embodiments, the fifth gear set 90 comprises a sixth gear 91 and a seventh gear 92 connected with each other, the sixth gear 91 is connected with the third member 13, and the seventh gear 92 is connected with the output shaft 70.

[0055] Continuing to refer to Figure 2 and Figure 3 In some alternative embodiments, the vehicle transmission further comprises 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 drive shaft 111, a second drive shaft 112, a third drive shaft 113, and a fourth drive shaft 114;

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

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

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

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

[0060] Specifically, the first transmission shaft 111 is connected with the first motor MG1 and the first torque transmission mechanism 20, the first gear set 40 is selectively connected with the first transmission shaft 111 through the first torque transmission mechanism 20, the first gear set 40 is connected with 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 with the first motor MG1 and the first torque transmission mechanism 20, the second gear set 50 is selectively connected with the first transmission shaft 111 through the first torque transmission mechanism 20, the second gear set 50 is connected with the second transmission shaft 112, the second transmission shaft 112 is connected with the engine Engine, and the first torque transmission mechanism 20 can control the selective transmission connection between the second gear set 50 and the first transmission shaft 111, so that the first torque transmission mechanism 20 can control the selective transmission connection between the engine Engine and the first motor MG1.

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

[0063] With reference to Figure 2 and Figure 3 Optionally, the output shaft 70 is connected with an output gear. The output gear is connected with a drive shaft. The drive shaft is connected with a wheel, so as to realize the driving of the vehicle.

[0064] It should be noted that, Figure 1 、 Figure 3 and Figure 5 The above examples show several setting modes of the gear sets in the vehicle transmission. In other embodiments of the present disclosure, the gear sets in the vehicle transmission can also adopt other setting modes. The gear ratios of the gear sets can be set according to requirements. The present disclosure will not be described here in detail.

[0065] With reference to Figure 1 , the present disclosure also provides a hybrid system, which comprises an engine Engine, a first motor MG1, a second motor MG2 and a transmission. The transmission is the vehicle transmission provided by the present disclosure.

[0066] Specifically, the present disclosure also provides a hybrid system, which comprises an engine Engine, a first motor MG1, a second motor MG2 and a transmission. The transmission is the vehicle transmission provided by the present disclosure.

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

[0068] The first torque transfer mechanism 20 is configured to selectively connect the second member 12 with the first motor MGl and the first torque transfer mechanism 20 is also configured to selectively connect the engine Engine with the first motor MGl, i.e. the second member 12 can be disconnected or connected with the first motor MGl by the first torque transfer mechanism 20 and the engine Engine can be disconnected or connected with the first motor MGl by the first torque transfer mechanism 20. The second torque transfer mechanism 30 is configured to selectively connect the engine Engine with the output shaft 70, i.e. the engine Engine can be disconnected or connected with the output shaft 70 by the second torque transfer mechanism 30. Thus, the vehicle can achieve the required performance in different working modes by the differential gear device 10, the first torque transfer mechanism 20 and the second torque transfer mechanism 30.

[0069] With reference to the accompanying drawings, the hybrid power system provided by the present disclosure will be described in detail. Figure 1 The hybrid power system achieves different working modes by controlling the switching of the working states of the first torque transfer mechanism 20 and the second torque transfer mechanism 30, the working modes include high load mode, series mode and parallel mode.

[0070] Specifically, the second member 12 can be disconnected or connected with the first motor MGl by the first torque transfer mechanism 20 and the engine Engine can be disconnected or connected with the first motor MGl by the first torque transfer mechanism 20, the engine Engine can be disconnected or connected with the output shaft 70 by the second torque transfer mechanism 30, i.e. the hybrid power system achieves different working modes by controlling the switching of the working states of the first torque transfer mechanism 20 and the second torque transfer mechanism 30, the working modes include high load mode, series mode and parallel mode, and the vehicle can achieve the required performance in different working modes.

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

[0072] Hereinafter, the working mode of the exemplary embodiment according to the present application will be described. Figures 6-9

[0073] Referring 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 with the first motor MGl, and the first torque transmission mechanism 20 controls the engine Engine to be disconnected with the first motor MGl, and the second torque transmission mechanism 30 controls the engine Engine to be disconnected with the output shaft 70. At this time, part of the power of the engine Engine is converted into electric energy, and the rest of the power of the engine Engine is all transmitted to the output shaft 70. In this mode, the power flow can generate a higher continuous drive shaft torque, and when needed, the engine Engine can continuously output the maximum power in a wider vehicle speed range, so as to meet the high load demand of the vehicle without affecting the normal driving of the vehicle.

[0074] Referring 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 high load mode, the first motor MGl is rotated in the forward direction;

[0076] In the high-speed high load mode, the first motor MGl is rotated in the reverse direction.

[0077] Specifically, referring to Figure 6 In the low-speed high load mode, the first motor MGl is rotated in the forward direction, and part of the power of the engine Engine is converted into electric energy through the first motor MGl, and the rest of the power of the engine Engine is all 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, and when needed, the engine Engine can continuously output the maximum power in a wider vehicle low speed range, so as to meet the high load demand of the vehicle at low speed without affecting the normal driving of the vehicle.

[0078] Referring to Figure 7 In the high-speed high load mode, the first motor MGl is rotated in the reverse direction, and part of the power of the engine Engine is converted into electric energy through the second motor MG2, and the rest of the power of the engine Engine is all 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, and when needed, the engine Engine can continuously output the maximum power in a wider vehicle high speed range, so as to meet the high load demand of the vehicle at high speed without affecting the normal driving of the vehicle.

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

[0080] With reference 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 MGl, and the first torque transmission mechanism 20 controls the engine Engine to be connected to the first motor MGl, and the second torque transmission mechanism 30 controls the engine Engine to be disconnected from the output shaft 70. When the vehicle transmission includes the first gear set 40, the third gear set 60, and the fifth gear set 90, the first torque transmission mechanism 20 is further configured to selectively drivingly connect the first gear set 40 to the first motor MGl, the first gear set 40 being connected to the second component 12, the second torque transmission mechanism 30 is configured to selectively drivingly connect the third gear set 60 to the output shaft 70, the third gear set 60 being connected to the first component 11, and the fifth gear set 90 being 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 idling. At this time, the power of the engine Engine is converted into electrical energy by the first motor MGl, and then transmitted to the second motor MG2, and finally transmitted to the output shaft 70. In this mode, the drive shaft torque and the engine power can meet the normal driving demand.

[0081] With reference to Figure 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 MGl, and the first torque transmission mechanism 20 controls the engine Engine to be disconnected from the first motor MGl, and the second torque transmission mechanism 30 controls the engine Engine to be connected to the output shaft 70. When the vehicle transmission includes the first gear set 40, the second gear set 50, and the fifth gear set 90, the first torque transmission mechanism 20 is configured to selectively drivingly connect the first gear set 40 to the first motor MGl, the first gear set 40 being connected to the second component 12, the first torque transmission mechanism 20 is further configured to selectively drivingly connect the second gear set 50 to the first motor MGl, the second gear set 50 being connected to the engine Engine, and the fifth gear set 90 being 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 idling. At this time, the power of the engine Engine is directly transmitted to the output shaft 70. In this mode, the engine Engine generates continuous average power required for driving, and the second motor MG2 responds to dynamic fluctuations occurring during driving, and this mode has high efficiency when driving on the highway.

[0082] The hybrid power system provided by the embodiments of the present disclosure can realize 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 merely that of the preferred embodiments of the present disclosure and the explanation of the principles of the technology applied. It should be understood by those skilled in the art that the disclosed range of the present disclosure is not limited to the technical solutions formed by the specific combinations of the technical features described above, and should also cover other technical solutions formed by any combinations of the technical features described above or their equivalent features without departing from the disclosed concept. For example, the technical solutions formed by the mutual replacement of the above-described features and the technical features disclosed in the present disclosure (but not limited to) having similar functions.

[0084] In addition, although each operation is described in a particular order, this should not be understood as requiring the operations to be performed in the specific order shown or in a sequential order. In certain circumstances, multitasking and parallel processing can be advantageous. Similarly, although several implementation details are included in the above discussion, these should not be interpreted as limiting the scope of the present disclosure. Certain features described in the context of separate embodiments can also be combined in a single embodiment. Conversely, various features described in the context of a single embodiment can also be separated and implemented in multiple embodiments.

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

[0086] The above description is merely that of the specific embodiments of the present disclosure, enabling those skilled in the art to 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 can 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 these 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 by, Comprising: a differential gear device, the differential gear device comprising a first component, a second component and a third component connected in transmission, 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 with an engine, the third component being connected with an output shaft; a first torque transmission mechanism, the first torque transmission mechanism being configured to selectively connect the second component with a first motor in transmission, and the first torque transmission mechanism being further configured to selectively connect the engine with the first motor in transmission; a second torque transmission mechanism, the second torque transmission mechanism being configured to selectively connect the engine with the output shaft in transmission.

2. The vehicle transmission of claim 1, wherein: the vehicle transmission further comprises a first gear set and a second gear set; the first torque transmission mechanism is configured to selectively connect the first motor with the second component in transmission through combination with the first gear set, the first gear set being connected with the second component, and the first torque transmission mechanism is further configured to selectively connect the engine with the first motor in transmission through combination with the second gear set, the second gear set being connected with the first component.

3. The vehicle transmission of claim 1, wherein: the vehicle transmission further comprises 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 with the output shaft in transmission through combination with the third gear set, the third gear set being connected with the first component; the fourth gear set is connected between a second motor and the output shaft; the fifth gear set is connected between the third component and the output shaft.

4. The vehicle transmission of claim 1, wherein: the vehicle transmission further comprises 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 with the first motor and the first torque transmission mechanism, the first gear set is selectively connected with the first transmission shaft in transmission through the first torque transmission mechanism, the first gear set is connected with the second component, the second gear set is selectively connected with the first transmission shaft in transmission through the first torque transmission mechanism, the second gear set is connected with the second transmission shaft; the second transmission shaft is connected with the engine and the first component, the third gear set is connected with the second transmission shaft; the third transmission shaft is connected with the second torque transmission mechanism and the third gear set, the third transmission shaft is selectively connected with the output shaft in transmission through the second torque transmission mechanism; The output shaft is connected with the fifth gear set, the fifth gear set is connected with the third component, the output shaft is connected with the fourth gear set, the fourth gear set is connected with the fourth transmission shaft, and the fourth transmission shaft is connected with the second motor.

5. A hybrid system characterized by comprising: The vehicle 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 system according to claim 5, characterized by The hybrid 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 system according to claim 6, wherein, in the high-load mode, the first torque transmission mechanism controls the second component to be connected with 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 system according to claim 7, wherein, the high-load mode includes a low-speed high-load mode and a high-speed high-load mode; in the low-speed high-load mode, the first motor rotates in the forward direction; in the high-speed high-load mode, the first motor rotates in the reverse direction.

9. The hybrid system according to claim 6, wherein, 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 with the first motor, and the second torque transmission mechanism controls the engine to be disconnected from the output shaft.

10. The hybrid system according to claim 6, wherein, 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 with the output shaft.

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