New energy hybrid power driving system

Abstract

The utility model discloses a new energy hybrid power driving system which comprises an engine, a driving motor, a hydraulic torque converter, an input shaft, a motor shaft, an intermediate shaft, an output shaft, a first gear, a second gear, a third gear, a fourth gear, a main clutch and a transmission assembly. The input shaft, the motor shaft, the intermediate shaft and the output shaft are arranged in a rotating mode, the engine is connected with the hydraulic torque converter, the hydraulic torque converter is connected with the input shaft, the driving motor is connected with the motor shaft, the first gear is connected to the input shaft, and the second gear is connected to the output shaft. The intermediate shaft is sleeved with the second gear in an empty mode, and the first gear is meshed with the second gear. The driving motor can be suitable for the working condition of long-time low-speed large-torque driving, the load of the driving motor under the long-time low-speed large-torque working condition can be reduced, the heating value of the driving motor can be reduced, the driving motor is prevented from being damaged, and the reliability and the service life of the driving motor are prevented from being influenced.

Description

Technical Field

[0001] The utility model relates to a new energy hybrid power driving system. Background Art

[0002] At present, in the mainstream hybrid drive systems on the market, the engine, drive motor and generator will switch to different modes according to different vehicle usage scenarios, road conditions and vehicle speeds, such as pure electric mode, series mode, parallel mode and parking power generation mode.

[0003] In the existing hybrid drive system, when the vehicle speed is low or just starting, a large torque is required to drive the vehicle. At this time, if the engine is started, the idle speed of the engine is about 850rpm and the engine is not working in the high-efficiency zone. If the engine and the wheel end are directly connected for driving at low speed, the engine will be suffocated due to the excessive speed ratio. Since the drive motor has the characteristics of fast response and high instantaneous torque burst, new energy vehicles usually adopt pure electric or series mode when the vehicle speed is low or just starting, so that the drive motor alone provides driving force to drive the vehicle, and the engine and generator do not participate in the drive. However, the above-mentioned hybrid drive system cannot meet the working conditions of long-term low-speed and high-torque driving. For example, if the vehicle is in a low-speed climbing condition for a long time, the drive motor alone drives the vehicle due to the low speed. The drive motor is in a high-torque and high-load operation state for a long time, which will greatly increase the heat generation, and then damage the drive motor, resulting in the reliability of the drive motor being damaged and the life of the drive motor being reduced. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a new energy hybrid power drive system, which can be suitable for long-term low-speed and high-torque driving conditions, can reduce the load of the drive motor under long-term low-speed and high-torque conditions, and thus can reduce the heat generated by the drive motor, avoid damage to the drive motor, and avoid affecting the reliability and life of the drive motor.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a new energy hybrid power drive system, which includes an engine, a drive motor, a torque converter, an input shaft, a motor shaft, an intermediate shaft, an output shaft, a first gear, a second gear, a third gear, a fourth gear, a main clutch and a transmission assembly;

[0006] The input shaft, the motor shaft, the intermediate shaft and the output shaft are respectively rotatably arranged;

[0007] The engine is connected to the torque converter, and the torque converter is connected to the input shaft;

[0008] The driving motor is connected to the motor shaft;

[0009] The first gear is connected to the input shaft, the second gear is loosely mounted on the intermediate shaft, and the first gear is meshed with the second gear;

[0010] The third gear is connected to the motor shaft, the fourth gear is connected to the intermediate shaft, and the third gear is meshed with the fourth gear;

[0011] The second gear is connected to the fourth gear or the intermediate shaft through the main clutch;

[0012] The intermediate shaft is drivingly connected to the output shaft through the transmission assembly.

[0013] Furthermore, the new energy hybrid power drive system also includes a generator and a generator shaft;

[0014] The power generation shaft is rotatably arranged, and the power generation shaft is drivingly connected to the input shaft;

[0015] The generator is connected to the power generation shaft.

[0016] Furthermore, a fifth gear is connected to the generator shaft, and the fifth gear is meshed with the first gear to achieve transmission connection between the generator shaft and the input shaft.

[0017] Furthermore, the generator is connected to the generator shaft via a spline.

[0018] Furthermore, the driving motor is connected to the motor shaft via a spline.

[0019] Furthermore, the transmission assembly includes a sixth gear and a seventh gear, the sixth gear is connected to the intermediate shaft, the seventh gear is connected to the output shaft, and the sixth gear is meshed with the seventh gear.

[0020] Furthermore, the new energy hybrid power drive system also includes an oil pump and a transmission shaft;

[0021] The transmission shaft is rotatably arranged and drivingly connected to the input shaft;

[0022] The transmission shaft is connected to the oil pump.

[0023] Furthermore, the new energy hybrid power driving system also includes an eighth gear and a ninth gear, the eighth gear is connected to the input shaft, the ninth gear is connected to the transmission shaft, and the eighth gear is meshed with the ninth gear.

[0024] Furthermore, the main clutch is a wet clutch.

[0025] After adopting the above technical solution, the torque converter includes a pump impeller, a turbine, a locking clutch, a stator and a housing. The torque converter is filled with automatic transmission oil. When the engine rotates, it drives the pump impeller to rotate, thereby forcing the automatic transmission oil to form a strong liquid flow to flow out of the pump impeller, and then drives the turbine to rotate through the liquid flow, and then drives the output shaft to rotate through the turbine. When the locking clutch is engaged, the torque converter works in a coupling locking state, and when the locking clutch is disengaged, the torque converter works in a torque conversion state.

[0026] When the vehicle is running under the condition of long-term low speed and high torque, the engine and the drive motor are both started, the main clutch is engaged, and the torque converter is operated in the torque conversion state. The torque converter in the torque conversion state can multiply the torque from the engine and output it to the input shaft. At this time, the torque output by the drive motor is transmitted to the wheel end through the motor shaft, the third gear, the fourth gear, the intermediate shaft, the transmission assembly and the output shaft in sequence, thereby driving the vehicle; the torque output by the engine is multiplied by the torque converter and output to the input shaft, and then transmitted to the wheel end through the first gear, the second gear, the main clutch, the fourth gear, the intermediate shaft, the transmission assembly and the output shaft in sequence, thereby driving the vehicle. At this time, the engine and the drive motor can jointly provide torque to drive the vehicle, and the torque of the engine is also enhanced by the torque converter, so that the workload under the condition of long-term low speed and high torque can be shared with the drive motor, thereby reducing the heat generated by the drive motor, avoiding damage to the drive motor, and avoiding affecting the reliability and life of the drive motor, so it is more suitable for the condition of long-term low speed and high torque driving.

[0027] In addition, the torque is transmitted through the automatic transmission oil in the torque converter, so there is no rigid connection between the engine and the input shaft, but the torque of the engine is multiplied and transmitted to the input shaft through the automatic transmission oil as a medium, so the engine will not be choked even at low speeds. Furthermore, when the vehicle speed is high, the torque converter switches to the coupling lock state, at which time the torque converter only transmits the torque of the engine without increasing the torque, so it does not affect the high-speed performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the new energy hybrid power drive system of the utility model;

[0029] Figure 2 It is a curve diagram of torque and vehicle speed when the new energy hybrid power driving system of the utility model drives the vehicle to start when the battery power is sufficient;

[0030] Figure 3 The utility model is a curve diagram of torque and vehicle speed when the new energy hybrid power drive system drives the vehicle to start when the battery power is insufficient. DETAILED DESCRIPTION

[0031] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0032] like Figure 1 As shown, a new energy hybrid power drive system includes an engine 1, a drive motor 2, a torque converter 3, an input shaft 4, a motor shaft 5, an intermediate shaft 6, an output shaft 7, a first gear 8, a second gear 9, a third gear 10, a fourth gear 11, a main clutch 12 and a transmission assembly;

[0033] The input shaft 4, the motor shaft 5, the intermediate shaft 6 and the output shaft 7 are respectively rotatably arranged;

[0034] The engine 1 is connected to the hydraulic torque converter 3, and the hydraulic torque converter 3 is connected to the input shaft 4;

[0035] The driving motor 2 is connected to the motor shaft 5;

[0036] The first gear 8 is connected to the input shaft 4, the second gear 9 is loosely mounted on the intermediate shaft 6, and the first gear 8 is meshed with the second gear 9;

[0037] The third gear 10 is connected to the motor shaft 5, the fourth gear 11 is connected to the intermediate shaft 6, and the third gear 10 is meshed with the fourth gear 11;

[0038] The second gear 9 is connected to the fourth gear 11 or the intermediate shaft 6 through the main clutch 12;

[0039] The intermediate shaft 6 is transmission-connected to the output shaft 7 through the transmission assembly, and the output shaft 7 is connected to the wheel end.

[0040] Specifically, the torque converter 3 includes a pump impeller, a turbine, a locking clutch, a stator and a housing. The torque converter 3 contains automatic transmission oil ATF. When the engine 1 rotates, it drives the pump impeller to rotate, thereby forcing the automatic transmission oil to form a strong liquid flow to flow out of the pump impeller, and then drives the turbine to rotate through the liquid flow, and then drives the output shaft 7 to rotate through the turbine. When the locking clutch is engaged, the torque converter 3 works in a coupling locking state, and when the locking clutch is disengaged, the torque converter 3 works in a torque conversion state.

[0041] When the vehicle is running under the condition of low speed and high torque for a long time, the engine 1 and the drive motor 2 are both started, the main clutch 12 is engaged, and the torque converter 3 is operated in the torque conversion state. The torque converter 3 in the torque conversion state can multiply the torque from the engine 1 and output it to the input shaft 4. At this time, the torque output by the drive motor 2 is transmitted to the wheel end through the motor shaft 5, the third gear 10, the fourth gear 11, the intermediate shaft 6, the transmission assembly and the output shaft 7 in sequence, thereby driving the vehicle; the torque output by the engine 1 is multiplied by the torque converter 3 and output to the input shaft 4, and then transmitted to the wheel end through the first gear 8, the second gear 9, the main clutch 12, the fourth gear 11, the intermediate shaft 6, the transmission assembly and the output shaft 7 in sequence, thereby driving the vehicle. At this time, the engine 1 and the drive motor 2 can jointly provide torque to drive the vehicle, and the torque of the engine 1 is also enhanced by the torque converter 3, so it can share the workload of the drive motor 2 under long-term low-speed and high-torque conditions, thereby reducing the heat generated by the drive motor 2, avoiding damage to the drive motor 2, and avoiding affecting the reliability and life of the drive motor 2. Therefore, it is more suitable for long-term low-speed and high-torque driving conditions.

[0042] Furthermore, the torque is transmitted through the automatic transmission oil in the torque converter 3, so there is no rigid connection between the engine 1 and the input shaft 4, but the torque of the engine 1 is multiplied and transmitted to the input shaft 4 through the automatic transmission oil as a medium, so the engine 1 will not be suffocated even at low speed. Furthermore, when the vehicle speed is high, the torque converter 3 switches to the coupling lock state, at which time the torque converter 3 only transmits the torque of the engine 1 without increasing the torque, so it does not affect the high-speed performance. Among them, the specific structure of the torque converter 3 is the existing technology.

[0043] like Figure 1 As shown, the new energy hybrid power drive system may further include a generator 13 and a generator shaft 14;

[0044] The power generation shaft 14 is rotatably arranged, and the power generation shaft 14 is drivingly connected to the input shaft 4;

[0045] The generator 13 is connected to the power generation shaft 14 .

[0046] like Figure 1 As shown, a fifth gear 15 is connected to the generator shaft 14, and the fifth gear 15 is meshed with the first gear 8 to make the generator shaft 14 transmission-connected to the input shaft 4; specifically, the engine 1 drives the generator 13 to work through the torque converter 3, the input shaft 4, the first gear 8, the fifth gear 15 and the generator shaft 14 in sequence.

[0047] In this embodiment, the generator 13 is connected to the generator shaft 14 via a spline, and the drive motor 2 is connected to the motor shaft 5 via a spline.

[0048] like Figure 1 As shown, the transmission assembly may include a sixth gear 16 and a seventh gear 17 , wherein the sixth gear 16 is connected to the intermediate shaft 6 , and the seventh gear 17 is connected to the output shaft 7 , and the sixth gear 16 is meshed with the seventh gear 17 .

[0049] like Figure 1 As shown, the new energy hybrid power drive system may further include an oil pump 18 and a transmission shaft 19;

[0050] The transmission shaft 19 is rotatably arranged and is transmission-connected to the input shaft 4;

[0051] The transmission shaft 19 is connected to the oil pump 18 .

[0052] like Figure 1 As shown, the new energy hybrid drive system can also include an eighth gear 20 and a ninth gear 21, the eighth gear 20 is connected to the input shaft 4, the ninth gear 21 is connected to the transmission shaft 19, and the eighth gear 20 is meshed with the ninth gear 21, so that the engine 1 drives the oil pump 18 to work through the torque converter 3, the input shaft 4, the eighth gear 20, the ninth gear 21 and the transmission shaft 19 in sequence.

[0053] In this embodiment, the main clutch 12 may be a wet clutch.

[0054] Specifically, Figure 2 This is a curve diagram of torque and vehicle speed when the new energy hybrid drive system of the embodiment of the present application drives the vehicle to start when the battery power is sufficient. Figure 2 The solid line in the middle represents the situation in which the drive motor 2 is driven alone without the torque converter 3 in the original structure, and the engine 1 and the generator 13 do not participate in the driving; the dotted line represents the situation in which the torque converter 3 is added in the embodiment of the present application, and the vehicle starts directly into the parallel state and the torque of the engine 1 is increased by the torque converter 3. It can be seen that the torque output capacity after adding the torque converter 3 is stronger than the torque output capacity of the original structure.

[0055] Specifically, Figure 3 This is a curve diagram of torque and vehicle speed when the new energy hybrid drive system of the embodiment of the present application drives the vehicle to start when the battery power is insufficient. Figure 3The solid line in the middle represents the situation in which the drive motor 2 is driven alone without the addition of the torque converter 3 in the original structure, and the engine 1 and the generator 13 do not participate in the driving; the dotted line represents the situation in which after the torque converter 3 is added in the embodiment of the present application, the engine 1 drives the generator 13 to generate electricity and the drive motor 2 drives the vehicle due to insufficient battery power. It can be seen that the solid line overlaps with the dotted line, so at this time, the torque output capacity after the addition of the torque converter 3 is basically consistent with the torque output capacity of the original structure.

[0056] In summary, the torque converter 3 includes a pump impeller, a turbine, a locking clutch, a stator and a housing. The torque converter 3 is filled with automatic transmission oil. When the engine 1 rotates, it drives the pump impeller to rotate, thereby forcing the automatic transmission oil to form a strong liquid flow to flow out of the pump impeller, and then drives the turbine to rotate through the liquid flow, and then drives the output shaft 7 to rotate through the turbine. When the locking clutch is engaged, the torque converter 3 works in a coupling locking state, and when the locking clutch is disengaged, the torque converter 3 works in a torque conversion state.

[0057] When the vehicle is running under the condition of low speed and high torque for a long time, the engine 1 and the drive motor 2 are both started, the main clutch 12 is engaged, and the torque converter 3 is operated in the torque conversion state. The torque converter 3 in the torque conversion state can multiply the torque from the engine 1 and output it to the input shaft 4. At this time, the torque output by the drive motor 2 is transmitted to the wheel end through the motor shaft 5, the third gear 10, the fourth gear 11, the intermediate shaft 6, the transmission assembly and the output shaft 7 in sequence, thereby driving the vehicle; the torque output by the engine 1 is multiplied by the torque converter 3 and output to the input shaft 4, and then transmitted to the wheel end through the first gear 8, the second gear 9, the main clutch 12, the fourth gear 11, the intermediate shaft 6, the transmission assembly and the output shaft 7 in sequence, thereby driving the vehicle. At this time, the engine 1 and the drive motor 2 can jointly provide torque to drive the vehicle, and the torque of the engine 1 is also enhanced by the torque converter 3, so it can share the workload of the drive motor 2 under long-term low-speed and high-torque conditions, thereby reducing the heat generated by the drive motor 2, avoiding damage to the drive motor 2, and avoiding affecting the reliability and life of the drive motor 2. Therefore, it is more suitable for long-term low-speed and high-torque driving conditions.

[0058] Furthermore, the torque is transmitted through the automatic transmission oil in the torque converter 3, so there is no rigid connection between the engine 1 and the input shaft 4, but the torque of the engine 1 is multiplied and transmitted to the input shaft 4 through the automatic transmission oil as a medium, so the engine 1 will not be choked even at low speeds. Furthermore, when the vehicle speed is high, the torque converter 3 switches to a coupling lock state, at which time the torque converter 3 only transmits the torque of the engine 1 without increasing the torque, so it does not affect the high-speed performance.

[0059] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new energy hybrid power drive system, characterized in that: It comprises an engine (1), a drive motor (2), a hydraulic torque converter (3), an input shaft (4), a motor shaft (5), an intermediate shaft (6), an output shaft (7), a first gear (8), a second gear (9), a third gear (10), a fourth gear (11), a main clutch (12) and a transmission assembly; The input shaft (4), the motor shaft (5), the intermediate shaft (6) and the output shaft (7) are respectively rotatably arranged; The engine (1) is connected to the hydraulic torque converter (3), and the hydraulic torque converter (3) is connected to the input shaft (4); The driving motor (2) is connected to the motor shaft (5); The first gear (8) is connected to the input shaft (4), the second gear (9) is loosely mounted on the intermediate shaft (6), and the first gear (8) is meshed with the second gear (9); The third gear (10) is connected to the motor shaft (5), the fourth gear (11) is connected to the intermediate shaft (6), and the third gear (10) is meshed with the fourth gear (11); The second gear (9) is connected to the fourth gear (11) or the intermediate shaft (6) through the main clutch (12); The intermediate shaft (6) is transmission-connected to the output shaft (7) via the transmission assembly.

2. The new energy hybrid power drive system according to claim 1, characterized in that: It also includes a generator (13) and a generator shaft (14); The power generation shaft (14) is rotatably arranged, and the power generation shaft (14) is drivingly connected to the input shaft (4); The generator (13) is connected to the power generation shaft (14).

3. The new energy hybrid power drive system according to claim 2, characterized in that: The generator shaft (14) is connected to a fifth gear (15), and the fifth gear (15) is meshed with the first gear (8) to enable the generator shaft (14) to be transmission-connected to the input shaft (4).

4. The new energy hybrid power drive system according to claim 2, characterized in that: The generator (13) is connected to the generator shaft (14) via a spline.

5. The new energy hybrid power drive system according to claim 1, characterized in that: The driving motor (2) is connected to the motor shaft (5) via a spline.

6. The new energy hybrid power drive system according to claim 1, characterized in that: The transmission assembly comprises a sixth gear (16) and a seventh gear (17), wherein the sixth gear (16) is connected to the intermediate shaft (6), and the seventh gear (17) is connected to the output shaft (7), and the sixth gear (16) is meshed with the seventh gear (17).

7. The new energy hybrid power drive system according to claim 1, characterized in that: It also includes an oil pump (18) and a transmission shaft (19); The transmission shaft (19) is rotatably arranged and is transmission-connected to the input shaft (4); The transmission shaft (19) is connected to the oil pump (18).

8. The new energy hybrid power drive system according to claim 7, characterized in that: It also includes an eighth gear (20) and a ninth gear (21), wherein the eighth gear (20) is connected to the input shaft (4), and the ninth gear (21) is connected to the transmission shaft (19), and the eighth gear (20) is meshed with the ninth gear (21).

9. The new energy hybrid power drive system according to claim 1, characterized in that: The main clutch (12) is a wet clutch.

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