CN109986951A - Powertrain and Vehicles - Google Patents

Abstract

The present disclosure relates to a power drive system and a vehicle. The power drive system includes an engine; a transmission including a dual clutch and a planetary gear mechanism, an output shaft of the engine is connected to an input end of the dual clutch, and a first output shaft of the dual clutch is connected to the dual clutch The first moving part of the planetary gear mechanism, the second output shaft of the dual clutch is connected to the second moving part of the planetary gear mechanism, the first moving part or the second moving part or the third moving part of the planetary gear mechanism The component is used as the output end of the transmission; the output part is used to transmit the power output by the transmission to drive the vehicle.

Description

Powertrain and Vehicles

technical field

The present disclosure relates to a power drive system and a vehicle.

Background technique

In today's world, human beings are faced with two major challenges, energy shortage and environmental degradation. Traditional automobiles are increasingly plagued by the oil crisis. Energy conservation and environmental protection have gradually become the development theme of the automobile industry. In recent years, hybrid vehicles with two different power sources to reduce fuel consumption and emissions have been developed and applied, and put into commercial production to the market.

The hybrid drive system is generally composed of an engine, a generator, an electric motor, a power source, etc. The engine and the power source jointly provide power for the vehicle, which results in a complex structure, a large space occupation, and a high cost.

SUMMARY OF THE INVENTION

The purpose of the present disclosure is to provide a power drive system with a simple structure.

In order to achieve the above object, the present disclosure provides a power drive system, the system includes an engine; a transmission, the transmission includes a dual clutch and a planetary gear mechanism, the output shaft of the engine is connected to the input end of the dual clutch, the The first output shaft of the dual clutch is connected to the first moving member of the planetary gear mechanism, the second output shaft of the dual clutch is connected to the second moving member of the planetary gear mechanism, the first moving member of the planetary gear mechanism The moving part or the second moving part or the third moving part is used as the output end of the transmission; the output part is used for transmitting the power output by the transmission to drive the vehicle.

Optionally, the system further includes a first motor that generates electricity driven by the engine.

Optionally, the power shaft of the first motor is connected to the first output shaft or the second output shaft of the dual clutch, or the power shaft of the first motor is connected to the first output shaft or the second output shaft of the dual clutch. Two output shafts are integrally formed.

Optionally, the output shaft of the engine is connected to one end of the power shaft of the first motor, and the other end of the power shaft of the first motor is connected to the input end of the dual clutch.

Optionally, the system further includes a second motor, and the output part is further configured to output power from the second motor to drive the vehicle.

Optionally, the system further includes a first transmission gear, a second transmission gear and an output shaft, the output end of the transmission is connected to the first transmission gear, and the second transmission gear is mounted on the output shaft and meshed with the first transmission gear, the output part is used for outputting the power from the output shaft to drive the vehicle.

Optionally, the first transmission gear is mounted on the power shaft of the second motor.

Optionally, the system further includes a clutch, and the output end of the transmission is connected with the power shaft of the second motor through the clutch.

Optionally, the first moving part or the second moving part is used as the output end of the transmission, and the transmission further comprises a braking device, and the braking device is used for releasably braking the third moving part .

Optionally, the first moving part is a sun gear, the second moving part is a planet carrier, the third moving part is a ring gear, and the second moving part serves as an output end of the transmission.

Optionally, a first output shaft of the dual clutch is idle on a second output shaft, the second output shaft passes through the sun gear to be connected to the planet carrier, and the sun gear is idle over the on the second output shaft.

In the present disclosure, through the combination of the dual clutch and the planetary gear mechanism, the engine can realize two-speed power drive, the structure is simple, and the operation is convenient.

The present disclosure also provides a vehicle including the power drive system as described above.

Other features and advantages of the present disclosure will be described in detail in the detailed description that follows.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification, and together with the following detailed description, are used to explain the present disclosure, but not to limit the present disclosure. In the attached image:

FIG. 1 is a schematic structural diagram of a transmission according to an embodiment of the present disclosure;

2 is a schematic schematic diagram of a power drive system according to a first embodiment of the present disclosure;

3 is a schematic schematic diagram of a power drive system according to a second embodiment of the present disclosure;

FIG. 4 is a schematic schematic diagram of a power drive system according to a third embodiment of the present disclosure.

Detailed ways

The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure, but not to limit the present disclosure.

According to an aspect of the present disclosure, there is provided a transmission, as shown in FIG. 1 , which includes a dual clutch 4 and a planetary gear mechanism. The dual clutch 4 has an input end 41 , a first output shaft 42 and a second output shaft 43 . The planetary gear mechanism includes a first moving part S1, a second moving part S2 and a third moving part S3. The first output shaft 42 of the dual clutch 4 is connected to the first moving member S1, the second output shaft 43 of the dual clutch 4 is connected to the second moving member S2, and the input end 41 of the dual clutch 4 can be used as the input end of the transmission. Any one of the moving part S1 , the second moving part S2 and the third moving part S3 can serve as the output end of the transmission.

The input end 41 of the dual clutch 4 may be the housing of the dual clutch 4, and the dual clutch 4 further includes two driven discs, and the first output shaft 42 of the dual clutch 4 may be connected with one of the driven discs through a key. The dual clutch 4 The second output shaft 43 can be connected with another driven plate through a key. Generally, the housing of the dual clutch 4 may be disconnected from the two driven discs, that is, the input end 41 is disconnected from both the first output shaft 42 and the second output shaft 43 . When one of the driven disks needs to be engaged, the casing can be controlled to engage with the corresponding driven disk to rotate synchronously, and the driven disk drives the corresponding output shaft to rotate synchronously, that is, the input end 41 is connected to the first output shaft 42 and the second output shaft One of the two output shafts 43 is drive-connected, so that the power from the input end 41 can be output through one of the first output shaft 42 and the second output shaft 43 .

It should be understood that the specific engagement state of the dual clutch 4 is affected by the control strategy. For those skilled in the art, the control strategy can be adaptively set according to the actual required transmission mode, so that the input end 41 and the two output All shafts are disconnected and the input 41 is drive-connected to one of the two output shafts to switch between modes.

In order to make the structure of the transmission more compact and to facilitate the arrangement on the whole vehicle, as shown in FIG.

In the present disclosure, through the combination of the dual clutch 4 and the planetary gear mechanism, a two-speed transmission with simple structure and convenient operation can be obtained.

In the case where the first moving member S1 of the planetary gear mechanism is used as the output end of the transmission, when the input end 41 of the dual clutch 4 is connected to the first output shaft 42 and disconnected from the second output shaft 43, the input The power input from the terminal 41 is directly transmitted to the first moving member S1 of the planetary gear mechanism through the first output shaft 42 of the dual clutch 4; when the input terminal 41 of the dual clutch 4 is connected to the second output shaft 43 and to the first output shaft 42 When disconnected, the power input from the input end 41 of the dual clutch 4 is sequentially transmitted to the first moving member S1 of the planetary gear mechanism through the second output shaft 43 of the dual clutch 4 and the second moving member S2 of the planetary gear mechanism. It can be seen that in the above two states, the power transmission paths in the transmission are different, and the transmission ratios are different, so the transmission can have two gears.

In the case where the second moving member S2 of the planetary gear mechanism is used as the output end of the transmission, when the input end 41 of the dual clutch 4 is connected to the first output shaft 42 and disconnected from the second output shaft 43, the input end 41 from the dual clutch 4 The power input from the terminal 41 is sequentially transmitted to the second moving member S2 of the planetary gear mechanism through the first output shaft 42 of the dual clutch 4 and the first moving member S1 of the planetary gear mechanism; when the input terminal 41 of the dual clutch 4 and the second output When the shaft 43 is connected and disconnected from the first output shaft 42 , the power input from the input end 41 of the dual clutch 4 is directly transmitted to the second moving member S2 of the planetary gear mechanism through the second output shaft 43 of the dual clutch 4 . It can be seen that in the above two states, the power transmission paths in the transmission are different, and the transmission ratios are different, so the transmission can have two gears.

With the third moving member S3 of the planetary gear mechanism as the output end of the transmission, when the input end 41 of the dual clutch 4 is connected to the first output shaft 42 and disconnected from the second output shaft 43, the input from the dual clutch 4 The power input from the terminal 41 is sequentially transmitted to the third moving member S3 of the planetary gear mechanism through the first output shaft 42 of the dual clutch 4 and the first moving member S1 of the planetary gear mechanism; when the input terminal 41 of the dual clutch 4 and the second output When the shaft 43 is connected and disconnected from the first output shaft 42, the power input from the input end 41 of the dual clutch 4 is sequentially transmitted to the planetary gear through the second output shaft 43 of the dual clutch 4 and the second moving member S2 of the planetary gear mechanism. The third moving part of the mechanism S3. It can be seen that in the above two states, the power transmission paths in the transmission are different, and the transmission ratios are different, so the transmission can have two gears.

Further, in order to make the transmission have a fixed transmission ratio when the input end 41 of the dual clutch 4 is connected to the second output shaft 43 and disconnected from the first output shaft 42, in one embodiment, as shown in FIG. 1 , The transmission may also comprise braking means 5 for releasably braking the third moving member S3 of the planetary gear mechanism. In this case, the first moving part S1 or the second moving part S2 can serve as the output end of the transmission.

Taking the second moving part S2 of the planetary gear mechanism as the output end of the transmission as an example, when the input end 41 of the dual clutch 4 is connected to the first output shaft 42 and disconnected from the second output shaft 43, the braking device 5 will The third moving part S3 of the gear mechanism is braked, and the third moving part S3 is fixed. The power input from the input end 41 of the dual clutch 4 passes through the first output shaft 42 of the dual clutch 4 and the first moving part S1 of the planetary gear mechanism in sequence. It is transmitted to the second moving member S2 of the planetary gear mechanism. At this time, the transmission ratio between the input end 41 of the dual clutch 4 and the second moving member S2 of the planetary gear mechanism is the first moving member S1 and the second moving member S2. When the input end 41 of the dual clutch 4 is connected to the second output shaft 43 and disconnected from the first output shaft 42, the braking device 5 releases the third moving part S3 of the planetary gear mechanism, and the third The moving part S3 is free, and the power input from the input end 41 of the dual clutch 4 is directly transmitted to the second moving part S2 of the planetary gear mechanism through the second output shaft 43 of the dual clutch 4. At this time, the input end 41 of the dual clutch 4 The transmission ratio with the second moving part S2 of the planetary gear mechanism is 1, and the entire planetary gear mechanism rotates as a whole.

The first moving element S1 , the second moving element S2 , and the third moving element S3 may be any one of the sun gear, the planet carrier, and the ring gear of the planetary gear mechanism, respectively. In the embodiment shown in FIG. 1 , the first moving element S1 is the sun gear, the second moving element S2 is the planet carrier, the third moving element S3 is the ring gear, and the second moving element S2 is the output end of the transmission. In this case, in order to facilitate the arrangement, the first output shaft 42 of the dual clutch 4 is idle on the second output shaft 43, and the second output shaft 43 passes through the sun gear to be connected to the planet carrier, the The sun gear is loosely sleeved on the second output shaft 43 .

In other possible implementations, the first moving member S1 may be a sun gear, the second moving member S2 may be a ring gear, and the third moving member S3 may be a planet carrier; The second moving part S2 can be a sun gear, and the third moving part S3 can be a ring gear; or, the first moving part S1 can be a planet carrier, the second moving part S2 can be a ring gear, and the third moving part S3 can be a sun gear; Alternatively, the first moving part S1 can be a ring gear, the second moving part S2 can be a sun gear, and the third moving part S3 can be a planet carrier; or, the first moving part S1 can be a ring gear, and the second moving part S2 can be It is a planet carrier, and the third moving part S3 can be a sun gear.

According to another aspect of the present disclosure, there is provided a power drive system, as shown in FIG. 2 , the system includes an engine 1 , a transmission as described above, and an output. The output shaft of the engine 1 is connected to the input end 41 of the dual clutch 4, and the output part is used to transmit the power output by the transmission to drive the vehicle.

Further, the power drive system may also include a first transmission gear 7, a second transmission gear 8 and an output shaft 9, the first transmission gear 7 is connected to the output end of the transmission, and the second transmission gear 8 is mounted on the output shaft 9 and is connected to the output shaft 9. The first transmission gear 7 meshes with each other, and the output shaft 9 rotates synchronously with the second transmission gear 8 . In this case, the output portion may be used to transmit the power output from the output shaft 9 to drive the vehicle.

For example, the output portion may include the output gear 10 , or may include the output gear 10 and the differential 12 . The output gear 10 is mounted on the output shaft 9 and rotates synchronously with the output shaft 9 , and the output gear 10 meshes with the final reduction gear 11 of the differential 12 . The function of the differential 12 is to make the left and right wheels roll at different angular velocities when the vehicle is turning or driving on an uneven road, so as to ensure pure rolling motion between the wheels on both sides and the ground. A final reduction gear 11 is provided on the differential 12 , and the final reduction gear 11 may be arranged on the housing of the differential 12 , for example.

In the second embodiment shown in FIG. 3 , the power drive system may further include a first motor 2 , which can generate electricity driven by the engine 1 , and can also be used as a motor to output power to drive the vehicle. The first electric machine 2 can be coupled into the power drive system in a number of ways.

In the second embodiment shown in FIG. 3 , the power shaft of the first electric machine 2 is connected with the first output shaft 42 of the dual clutch 4 or formed integrally with the first output shaft 42 .

In the third embodiment shown in FIG. 4 , the engine 1 is connected to the input end 41 of the double clutch 4 via the first electric machine 2 . Specifically, the output shaft of the engine 1 is connected to one end of the first motor 2 , and the other end of the first motor 2 is connected to the first output shaft 42 of the dual clutch 4 . In this case, the first motor 2 can also realize two-speed power output.

The power drive system may further include a second electric motor 3 , which can be used as an electric motor to drive the vehicle, and can also generate electricity driven by the engine 1 .

The second electric machine 3 may be coupled to the power drive system in any suitable manner. In the embodiment shown in FIGS. 3 and 4 , the power shaft of the second motor 3 is connected with the first transmission gear 7 . More specifically, the power shaft of the second motor 3 is connected to the output end of the transmission, and the first transmission gear 7 is mounted on the power shaft of the second motor 3 and rotates synchronously with the power shaft of the second motor 3 . In this case, a clutch 6 can be provided between the power shaft of the second motor 3 and the output end of the transmission, so that the power shaft of the second motor 3 and the output end of the transmission are connected through the clutch 6 . When the second motor 3 drives the vehicle alone, the clutch 6 can be controlled to disengage, so as to disengage the engine 1 and the transmission from the power shaft of the second motor 3, thereby reducing the load and improving the work efficiency.

The power drive system of the second embodiment of the present disclosure may have the following working modes:

1. Single-motor pure electric drive mode, the second motor 3 drives the vehicle alone, and the power transmission route is: second motor 3—first transmission gear 7—second transmission gear 8—output shaft 9—output gear 10—differential 12.

2. Dual-motor pure electric drive mode, the first motor 2 motor and the second motor 3 drive the vehicle together, there are two power routes, route 1: second motor 3 - first transmission gear 7 - second transmission gear 8 - output Shaft 9 - output gear 10 - differential 12; route 2: first motor 2 - sun gear - planet carrier - first transmission gear 7 - second transmission gear 8 - output shaft 9 - output gear 10 - differential 12 .

3. Single-motor drive mode for engine extended-range power generation, the first motor 2 only generates electricity, and the second motor 3 drives. There are two power transmission routes. The power generation route: engine 1—double clutch 4—planet carrier—sun gear—first motor 2; Driving route: the second motor 3—the first transmission gear 7—the second transmission gear 8—the output shaft 9—the output gear 10—the differential 12.

4. Engine low-speed extended-range driving mode, engine 1 drives the vehicle and drives the first motor 2 and the second motor 3 to generate electricity. There are three power transmission routes. The driving route is: engine 1—double clutch 4—sun gear—planet carrier—first Transmission gear 7 - second transmission gear 8 - output shaft 9 - output gear 10 - differential 12; power generation route: engine 1 - double clutch 4 - first motor 2; power generation route 2: engine 1 - double clutch 4 - sun Wheel - planet carrier - second motor 3.

5. Engine medium and low speed range extension drive mode, engine 1 drives the vehicle and drives the first motor 2 to generate electricity. There are two power transmission routes. The driving route is: engine 1—double clutch 4—sun gear—planet carrier—first transmission gear 7 - second transmission gear 8 - output shaft 9 - output gear 10 - differential 12; power generation route: engine 1 - double clutch 4 - first motor 2.

6. Engine direct drive mode 1. Engine 1 directly drives the vehicle, and the power transmission route is: engine 1—double clutch 4—first transmission gear 7—second transmission gear 8—output shaft 9—output gear 10—differential 12 .

7. Engine direct drive mode 2, engine 1 directly drives the vehicle, and the power transmission route is: engine 1—double clutch 4—sun gear—planet carrier—first transmission gear 7—second transmission gear 8—output shaft 9—output gear 10—Differential 12.

8. Engine range extension drive mode, the engine 1 and the second motor 3 drive the vehicle and drive the first motor 2 to generate electricity, there are three power transmission routes, the engine drive route: engine 1 - double clutch 4 - first transmission gear 7 - second Transmission gear 8 - output shaft 9 - output gear 10 - differential 12; second motor 3 driving route: second motor 3 - first transmission gear 7 - second transmission gear 8 - output shaft 9 - output gear 10 - differential Speed 12; power generation route: engine 1—double clutch 4—planet carrier—sun gear—first motor 2.

Nine, engine and single motor drive mode, engine 1 and second motor 3 jointly drive the vehicle, there are two power transmission routes, the engine drive route: engine 1—double clutch 4—first transmission gear 7—second transmission gear 8— Output shaft 9 - output gear 10 - differential 12; second motor 3 driving route: second motor 3 - first transmission gear 7 - second transmission gear 8 - output shaft 9 - output gear 10 - differential 12.

10. Engine and dual motor drive mode, engine 1, first motor 2 and second motor 3 drive the vehicle together, there are three power transmission routes, the engine drive route: engine 1 - dual clutch 4 - first transmission gear 7 - second Transmission gear 8 - output shaft 9 - output gear 10 - differential 12; second motor drive route: second motor 3 - first transmission gear 7 - second transmission gear 8 - output shaft 9 - output gear 10 - differential 12; the driving route of the first motor 2: the first motor 2—the sun gear—the planet carrier—the first transmission gear 7—the second transmission gear 8—the output shaft 9—the output gear 10—the differential 12.

11. In the deceleration power generation mode, the wheels drive the second motor 3 to generate electricity. The power transmission route is: differential 12 - output gear 10 - output shaft 9 - second transmission gear 8 - first transmission gear 7 - second motor 3.

In the present disclosure, by skillfully combining the dual clutch 4 and the planetary gear mechanism, a two-speed transmission with simple structure and convenient operation can be obtained. Since the transmission can provide two gears, the speed and torque of the engine 1 can be adjusted to a certain extent, and the working efficiency of the engine 1 can be improved.

In the present disclosure, the gear shift of the transmission is realized by the dual clutch 4, which can allow the engagement process of one driven plate to overlap with the disengagement process of the other driven plate during the shift switching, thereby avoiding the need for The instantaneous interruption of torque transmission ensures the smoothness of the shifting process and the running of the vehicle. Compared with synchronizers with more complex mechanical structures, dual clutches have great advantages in terms of smoothness and reliability.

The preferred embodiments of the present disclosure have been described above in detail with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above-mentioned embodiments. Various simple modifications can be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure. These simple modifications all fall within the protection scope of the present disclosure.

In addition, it should be noted that each specific technical feature described in the above-mentioned specific implementation manner may be combined in any suitable manner under the circumstance that there is no contradiction. In order to avoid unnecessary repetition, various possible combinations are not described in the present disclosure.

In addition, the various embodiments of the present disclosure can also be arbitrarily combined, as long as they do not violate the spirit of the present disclosure, they should also be regarded as the contents disclosed in the present disclosure.

Claims (12)

1. a power drive system, is characterized in that, comprises: engine (1); A transmission comprising a dual clutch (4) and a planetary gear mechanism, the output shaft (9) of the engine (1) is connected to the input end (41) of the dual clutch (4), the dual clutch (4) ) of the first output shaft (42) is connected to the first moving member (S1) of the planetary gear mechanism, and the second output shaft (43) of the dual clutch (4) is connected to the second output shaft (43) of the planetary gear mechanism a moving part (S2), the first moving part (S1) or the second moving part (S2) or the third moving part (S3) of the planetary gear mechanism is used as the output end of the transmission; The output part is used for transmitting the power output by the transmission to drive the vehicle. 2. The system according to claim 1, characterized in that, the system further comprises a first motor (2), and the first motor (2) is driven by the engine (1) to generate electricity. 3. The system according to claim 2, characterized in that the power shaft of the first electric machine (2) is connected to the first output shaft (42) or the second output shaft (43) of the dual clutch (4) ), or the power shaft of the first motor (2) is integrally formed with the first output shaft (42) or the second output shaft (43) of the dual clutch (4). 4. The system according to claim 2, wherein the output shaft (9) of the engine (1) is connected to one end of the power shaft of the first motor (2), and the first motor (2) The other end of the power shaft of ) is connected with the input end (41) of the double clutch (4). 5. The system according to claim 1, characterized in that the system further comprises a second motor (3), and the output part is further used to output power from the second motor (3) to drive the vehicle. 6. The system according to claim 5, characterized in that the system further comprises a first transmission gear (7), a second transmission gear (8) and an output shaft (9), the output of the transmission being connected to The first transmission gear (7) and the second transmission gear (8) are mounted on the output shaft (9) and mesh with the first transmission gear (7), and the output part is used to output the The power of the output shaft (9) is used to drive the vehicle. 7. The system according to claim 6, wherein the first transmission gear (7) is mounted on the power shaft of the second motor (3). 8. The system according to claim 6, characterized in that the system further comprises a clutch (6) through which the output end of the transmission and the power shaft of the second motor (3) pass through the clutch (6) connect. 9. The system according to any one of claims 1-8, characterized in that, the first moving part (S1) or the second moving part (S2) is used as the output end of the transmission, and the transmission also A braking device (5) is included for releasably braking the third moving member (S3). 10. The system according to claim 1, wherein the first moving part (S1) is a sun gear, the second moving part (S2) is a planet carrier, and the third moving part (S3) It is a ring gear, and the second moving part (S2) is used as the output end of the transmission. 11. The system according to claim 10, characterized in that the first output shaft (42) of the dual clutch (4) is hollowly sleeved on the second output shaft (43), and the second output shaft (43) ) passes through the sun gear to be connected to the planet carrier, the sun gear is idle on the second output shaft (43). 12. A vehicle comprising a power drive system according to any one of claims 1-11.