CN216374157U

CN216374157U - Power transmission system and vehicle with same

Info

Publication number: CN216374157U
Application number: CN202122635831.4U
Authority: CN
Inventors: 陈小江; 唐子威; 唐海锋; 郭建伟
Original assignee: If Technology Co Ltd
Current assignee: If Technology Co Ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-04-26
Anticipated expiration: 2031-10-29

Abstract

The utility model discloses a power transmission system and a vehicle with the same, wherein the power transmission system comprises: the engine is provided with a first power input shaft, the first motor generator is provided with a second power input shaft, and the second motor generator is provided with a third power input shaft; planetary gear mechanism, transmission includes: the connecting shaft is linked with the output end of the planetary gear mechanism; the intermediate shaft is linked with the third power input shaft and selectively linked with the connecting shaft; and the output shaft is selectively linked with the connecting shaft and/or the intermediate shaft. The power transmission system can realize the series-parallel hybrid of multiple power sources, and the vehicle can realize different driving function requirements under different driving working conditions, thereby reducing the energy consumption and emission of the whole vehicle and improving the driving experience. The utility model also provides a vehicle with the power transmission system.

Description

Power transmission system and vehicle with same

Technical Field

The utility model relates to the field of vehicles, in particular to a power transmission system and a vehicle with the same.

Background

In the related technology, the power-split hybrid power driving system adopting a coupling framework of a planetary gear and double electric generators is widely applied in the field of passenger vehicles and is limited by the driving capability of single-gear power splitting, and for larger vehicle types with high load demands, the single-gear input power splitting hybrid system has great limitation, the power and torque parameter matching of the double electric generators needs to be greatly improved to improve the traction capacity of the vehicle, so that the cost of an assembly system cannot be avoided. For commercial vehicle types which often need heavy load and even overload requirements, the single-gear power-division hybrid assembly system can cause the fuel consumption of the vehicle to be increased and the fuel economy of the vehicle to be deteriorated. In the field of light commercial vehicles, hybrid power mainly adopts a parallel hybrid structure of a single electric generator, the fuel saving effect of a hybrid system under urban working conditions is obviously lower than that of a power shunt and series-parallel hybrid system of a double electric generator, but the continuous climbing power and the fuel economy under high speed of the hybrid system are better.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, one object of the present invention is to provide a power transmission system, which can realize hybrid of multiple power sources, and the vehicle can realize different driving function requirements under different driving conditions, thereby reducing the energy consumption and emission of the entire vehicle, and improving the driving experience. The utility model also provides a vehicle with the power transmission system.

The power transmission system according to the embodiment of the utility model includes: the engine is provided with a first power input shaft, the first motor generator is provided with a second power input shaft, and the second motor generator is provided with a third power input shaft; a planetary gear mechanism provided with a sun gear, a carrier, and a ring gear that are fitted to each other, the first power input shaft and the second power input shaft being linked with any two of the sun gear, the carrier, and the ring gear, respectively, and another one of the sun gear, the carrier, and the ring gear being configured as an output end of the planetary gear mechanism; a transmission, the transmission comprising: the connecting shaft is linked with the output end of the planetary gear mechanism; an intermediate shaft in linkage with the third power input shaft and selectively in linkage with the connecting shaft; an output shaft selectively coupled to the connecting shaft and/or the intermediate shaft.

According to the power transmission system, power coupling of three power sources can be achieved, power of the engine and the first motor generator can be coupled through the connecting shaft, gear shifting output is conducted through the transmission device, the connecting shaft, the intermediate shaft and the output shaft are arranged in the transmission device, the intermediate shaft is linked with the third power input shaft, and power can be transmitted to the output shaft, so that the power transmission system can achieve different linkage modes of the three power sources, and meanwhile multi-gear transmission of the coupled power can be achieved.

According to an embodiment of the utility model, the second power input shaft is arranged parallel to the first power input shaft.

According to one embodiment of the utility model, the third power input shaft is arranged parallel to the intermediate shaft.

According to one embodiment of the utility model, the first power input shaft is connected to the planet carrier and the second power input shaft is linked to the sun gear.

According to one embodiment of the utility model, a power input driving gear is sleeved on the connecting shaft, and the power input driving gear is selectively engaged with the connecting shaft and linked with the intermediate shaft.

According to one embodiment of the present invention, the connecting shaft is provided with a first shifting device for selectively engaging the power input driving gear with the connecting shaft or engaging the connecting shaft with the output shaft.

According to one embodiment of the utility model, a countershaft input gear is provided on the countershaft, the countershaft input gear meshing with the power input drive gear; an output shaft input gear which can be selectively jointed with the output shaft is sleeved on the output shaft, an intermediate shaft output gear is further arranged on the intermediate shaft, and the intermediate shaft output gear is meshed with the output shaft input gear.

According to one embodiment of the utility model, the countershaft output gears and the output shaft input gears are configured in a one-to-one correspondence in pairs.

According to one embodiment of the utility model, the output shaft input gear comprises: an output shaft first input gear and an output shaft second input gear; the countershaft output gear includes: an intermediate shaft first output gear and an intermediate shaft second output gear; the output shaft first input gear and the output shaft second input gear are correspondingly meshed with the intermediate shaft first output gear and the intermediate shaft second output gear.

The vehicle according to the present invention is briefly described below.

According to the utility model, the vehicle is provided with the power transmission system in any one of the embodiments, and the vehicle is provided with the power transmission system in any one of the embodiments, so that the vehicle can realize the hybrid combination of multiple power sources, and simultaneously can realize different power modes of the vehicle.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of a powertrain system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a power transmission system having a sub-transmission case according to an embodiment of the present invention.

Reference numerals:

an engine 1; a first motor generator 2; a second motor generator 3;

a planetary gear mechanism 4; a sun gear 41; a carrier 42; a ring gear 43;

a first power input shaft 10; a second power input shaft 20; a third power input shaft 30;

the first shifting device k 1; the second shifting device k 2;

a first motor generator output gear 21; a first motor-generator input gear 22; the second motor generator output gear 31 a;

a third gear transmission 100; a power input drive gear 31; a sun gear connecting shaft 20 a; a connecting shaft 40; an intermediate shaft 50; an intermediate shaft input gear 51; countershaft first output gear 52 a; countershaft second output gear 52 b;

an output shaft 60; output shaft first input gear 62 a; the output shaft second input gear 62 b;

the sub-transmission mechanism 200;

the subtransmission input shaft 60 a; a sub-transmission output gear 61; range shifter k 3;

an auxiliary transmission intermediate shaft 70; an auxiliary change countershaft input gear 70 a; an auxiliary change countershaft output gear 70 b;

a range output shaft 80; the range output shaft inputs gear 82.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

A power transmission system for a vehicle according to an embodiment of the present invention will be described with reference to fig. 1 to 2.

The power transmission system according to the present invention includes an engine 1, a first motor generator 2, a second motor generator 3, and a planetary gear mechanism 4, the engine 1 is provided with a first power input shaft 10, the first motor generator 2 is provided with a second power input shaft 20, the second motor generator 3 is provided with a third power input shaft 30, a sun gear 41, a carrier 42, and a ring gear 43 that are fitted to each other are provided in the planetary gear mechanism 4, the first power input shaft 10 and the second power input shaft 20 are respectively linked with any two of the sun gear 41, the carrier 42, and the ring gear 43, and the other one of the sun gear 41, the carrier 42, and the ring gear 43 is configured as an output end of the planetary gear mechanism 4.

The power transmission system further comprises a transmission device 100, the transmission device 100 is provided with a connecting shaft 40, an intermediate shaft 50 and an output shaft 60, the connecting shaft 40 is linked with the output end of the gear ring 43 of the planetary gear mechanism 4, the intermediate shaft 50 is linked with the third power input shaft 30 and is selectively linked with the connecting shaft 40, and the output shaft 60 is selectively linked with the connecting shaft 40 and/or the intermediate shaft 50.

According to the power transmission system of the utility model, power coupling of three power sources can be realized, power of the engine 1 and the first motor generator 2 can be coupled with the connecting shaft 40, and gear shifting output is carried out through the transmission device 100, the transmission device 100 is provided with the connecting shaft 40, the intermediate shaft 50 and the output shaft 60, the intermediate shaft 50 is linked with the third power input shaft 30, and power can be transmitted to the output shaft 60, so that the power transmission system can realize different linkage modes of the three power sources and can realize multi-gear transmission of the coupled power.

According to the power transmission system for the vehicle, the planetary gear mechanism 4 is utilized to couple the power of the engine 1 and the power of the first motor generator 2 so as to realize hybrid power or speed regulation of the first motor generator 2 so as to keep the engine at the optimal rotating speed and reduce the oil consumption of the power transmission system, the second motor generator 3 can be in power coupling at the connecting shaft 40 so as to generate power or supplement power, and the transmission device 100 can realize gear shifting of the power transmission mechanism and switching of different power modes, so that the power transmission system can realize different linkage modes of three power sources, and provide an electric mode and a multi-input split-parallel-series hybrid mode.

According to one embodiment of the utility model, a second power input shaft 20 is arranged in parallel with said first power input shaft 10. The second power input shaft 20 and the first power input shaft 10 are arranged in parallel, so that the space in the power transmission system in the radial direction can be fully utilized, the arrangement and the arrangement of the first motor generator 2 are convenient, the connection between the first motor generator 2 and the sun gear 41 is simpler and more convenient, the assembly and the maintenance between the first motor generator 2 and the engine 1 are more convenient, and the cost of the power transmission system is reduced.

According to one embodiment of the utility model, the first power input shaft 10 is connected to the planet carrier 42 and the second power input shaft 20 is coupled to the sun gear 41. The second power input shaft 20 is provided with a first motor generator output gear 21, the power transmission system includes a first motor generator input gear 22 connected with a sun gear 41, the sun gear 41 and the first motor generator input gear 22 are configured as a duplicate gear and are sleeved on the periphery of the first power input shaft 10, and the first motor generator output gear 21 is engaged with the first motor generator input gear 22.

The first power input shaft 10 is linked with the planet carrier 42 to input the power of the engine 1 into the power transmission system, the second power input shaft 20 is linked with the sun gear 41, the first motor generator 2 performs speed regulation and shunting on the power of the engine 1 through the planetary gear mechanism 4, and the mechanical output power of the power coupling of the engine 1 and the second motor generator 2 is output through the output end of the gear ring 43 of the planetary gear mechanism 4.

According to one embodiment of the utility model, the third power input shaft 30 and the intermediate shaft 50 are arranged in parallel, so that the space in the power transmission system in the radial direction is fully utilized, the power transmission between the third power input shaft 30 and the intermediate shaft 50 is realized in a parallel shaft arrangement mode, the cost is low, the reliability is good, no empty sleeve shaft is required to be arranged, the component generalization degree is high, the manufacturing difficulty is low, and the maintenance is convenient.

According to an embodiment of the present invention, a power input driving gear 31 is sleeved on the connecting shaft 40, the power input driving gear 31 is selectively engaged with the connecting shaft 40 and is linked with the intermediate shaft 50, the power input driving gear 31 can transmit the power generated by coupling the engine 1 and the first motor generator 2 to the intermediate shaft 50, and the power coupling of the second motor generator 3 with other power is realized on the intermediate shaft 50. In some cases, since the power input driving gear 31 is freely sleeved on the connecting shaft, the connection between the intermediate shaft 50 and the planetary gear mechanism is disconnected under the condition that the second motor generator 3 is driven alone, and the output alone of the second motor generator 3 is realized.

According to one embodiment of the present invention, the connecting shaft 40 is provided with a first shifting device k1 for selectively engaging the power input driving gear 31 with the connecting shaft 40 or engaging the connecting shaft 40 with the output shaft 60. Different power modes in the powertrain can be achieved by providing the first shifting device k1, and three modes of neutral, engaging the power input drive gear with the connecting shaft 40, and engaging the connecting shaft 40 with the output shaft 60 are possible at the first shifting device k 1.

The intermediate shaft 50 is provided with an intermediate shaft input gear 51 and an intermediate shaft 50 output gear, and the intermediate shaft input gear 51 is meshed with the power input driving gear 31 so as to realize the linkage of the power input driving gear 31 and the intermediate shaft 50; the third power input shaft 30 is provided with a second motor generator output gear 31a directly meshed with the counter shaft input gear 51. the third power input shaft 30 is linked with the counter shaft 50, thereby transmitting the power of the second motor generator 3 to the counter shaft 50; an output shaft input gear which can be selectively jointed with the output shaft 60 is sleeved on the output shaft 60, a middle shaft output gear is further arranged on the middle shaft 50, the middle shaft output gear is meshed with the output shaft input gear so as to transmit power in the middle to the output shaft 60, and the rotating speed of the output shaft 60 is changed through the transmission ratio between the middle shaft output gear and the output shaft input gear, so that the power transmission system can be adjusted to be in a proper power interval.

According to one embodiment of the utility model, the output gears of the intermediate shafts and the input gears of the output shafts are constructed into a plurality of pairs in one-to-one correspondence, and the plurality of pairs of the output gears of the intermediate shafts and the input gears of the output shafts can realize different transmission ratios, so that the adjustable interval of the power transmission system is enriched, and the power transmission system can be suitable for different road conditions.

According to one embodiment of the present invention, the output shaft input gear comprises an output shaft first input gear 62a and an output shaft second input gear 62b, the intermediate shaft 50 comprises an intermediate shaft first output gear 52a and an intermediate shaft second output gear 52b, the output shaft first input gear 62a is correspondingly engaged with the intermediate shaft first output gear 52a, the output shaft second input gear 62b is correspondingly engaged with the intermediate shaft second output gear 52b, the gear ratio of the two pairs of gears is different, and the output shaft 60 can be selectively engaged with the output shaft first input gear 62a or the output shaft second input gear 62b to transmit the power of the intermediate shaft 50 to the output shaft 60.

As shown in fig. 1 and 2, according to an embodiment of the present invention, the intermediate shaft 50 is configured as a single intermediate shaft or a plurality of intermediate shafts, which are sequentially arranged around the circumference of the output shaft 60.

Further, a second shift device k2 is provided on the output shaft 60, the second shift device k2 selectively engages one of the output shaft first output gear 62a or the output shaft second output gear 62b with the output shaft 60, and adjustment of the gear ratio in the transmission 100 is achieved by the second shift device k 2.

A power transmission system according to the present application will be described below according to one embodiment of the present invention.

A hybrid system including an engine 1, a first motor generator 2, a second motor generator 3, a planetary gear mechanism 4, a first shift device k1, a second shift device k2, and a vertically disposed three-speed reduction gear mechanism; the power of the first motor generator 2 is connected with a sun gear 41 of the planetary gear mechanism 4, the power input of the engine 1 is directly connected with a planet carrier 42 of the planetary gear mechanism 4, the first motor generator 2 and the power input of the engine 1 are in stepless speed regulation power division linkage through the planetary gear mechanism 4, the engine 1, the first motor generator 2 and the second motor generator 3 are in linkage through a longitudinally-arranged three-gear speed reduction gear mechanism, and the mechanical linkage power of the engine 1 and the first motor generator 2 can be transmitted or disconnected from transmission according to the three-gear speed ratio after entering the three-gear speed reduction gear mechanism; the two gear shifting devices can selectively realize different linkage modes of the three power sources under the control of the control device, and provide an electric mode and a three-gear input shunting and parallel-serial hybrid mode.

The operating state of the power transmission system according to the present application is shown in the following table.

The power output path of the power transmission system according to the present invention.

First gear of engine: the first power input shaft 10 → the carrier 42 → the ring gear 43 → the connecting shaft 40 → the power input driving gear 31 → the counter shaft input gear 51 → the counter shaft 50 → the counter shaft first output gear 52a → the output shaft first input gear 62a → the output shaft 60;

second gear of the engine: the first power input shaft 10 → the carrier 42 → the ring gear 43 → the connecting shaft 40 → the power input driving gear 31 → the intermediate shaft input gear 51 → the intermediate shaft 50 → the intermediate shaft second output gear 52b → the output shaft second input gear 62b → the output shaft 60;

third gear of the engine: the first power input shaft 10 → the carrier 42 → the ring gear 43 → the connecting shaft 40 → the output shaft 60;

second motor generator first gear: third power input shaft 30 → second motor generator output gear 31a → intermediate shaft input gear 51 → intermediate shaft 50 → intermediate shaft first output gear 52a → output shaft first input gear 62a → output shaft 60;

second gear of the second motor generator: third power input shaft 30 → second motor generator output gear 31a → intermediate shaft input gear 51 → intermediate shaft 50 → intermediate shaft second output gear 52b → output shaft second input gear 62b → output shaft 60;

the power transmission system is in a pure electric mode, the charging state of a vehicle-mounted power battery is sufficient, the first motor generator 2 and the engine 1 are stopped, the first gear shifting device k1 is in a neutral gear, the second gear shifting device k2 enables one of the first input gear 62a of the output shaft and the second input gear 62b of the output shaft to be connected with the output shaft 60, and the second motor generator 3 is in pure electric driving and can cover the full-speed range of the whole vehicle.

The first gear shift device k1 is in neutral, and the engine 1, the first motor generator 2, and the planetary gear mechanism 4 are all in stationary stop without generating any extra loss.

The power transmission system is in a 1-gear power splitting eCTV 1 mode, a first gear shifting device k1 connects the connecting shaft 40 with the power input driving gear 31, and a second gear shifting device k2 connects the output shaft 60 with the output shaft first input gear 62 a; the first motor generator 2 works in a closed loop speed regulation mode, and the rotating speed of the engine 1 can be regulated to any required rotating speed by regulating the rotating speed of the first motor generator 2 according to the vehicle speed, so that the electronic stepless speed regulation control of the engine 1 is realized. The engine 1 applies torque, part of power of the engine 1 is output through a mechanical transmission path, the mechanical transmission path of the torque of the engine 1 is output according to a fixed speed ratio of 1 gear, and the rest part of power of the engine 1 is generated through the first motor generator 2 and charges a vehicle-mounted power battery or is directly driven and output by the second motor generator 3.

When the first motor generator 2 operates at the positive rotating speed, the power split of the first motor generator 2 is negative, namely part of power of the engine 1 is converted into electric energy, and a vehicle-mounted power battery is charged or part of the electric energy is supplied to the second motor generator 3 for driving; the speed of the first motor generator 2 is regulated to zero speed, the split power of the first motor generator 2 is zero, and all power of the engine 1 is output through a mechanical transmission path.

When the powertrain is in the 2-speed power split eCVT2 mode, the first shifter k1 engages the connecting shaft 40 with the power input driving gear 31, and the second shifter k2 engages the output shaft 60 with the output shaft second input gear 62 b; the first motor generator 2 works in a closed loop speed regulation and flow division mode, and partial power of the engine 1 is output according to a fixed 2-gear speed ratio: the power is input into the two-step speed reduction two-gear speed ratio from the driving gear 31 to the second input gear 62b of the output shaft, and the rest part of the power of the engine 1 is electrically and mechanically converted by the first motor generator 2 to charge the vehicle-mounted power battery or is partially and directly provided for the second motor generator 3 to output the power.

The driveline is in 3-speed power split eCVT3 mode, the first gear shift device k1 directly connects the connecting shaft 40 with the output shaft 60; the first motor generator 2 works in a closed-loop speed-regulating shunting mode, part of power of the engine 1 is output according to a fixed gear speed ratio, the rest part of power of the engine 1 is electrically and mechanically converted through the first motor generator 2 to charge a vehicle-mounted power battery or partially and directly provide electric energy for driving the second motor generator 3, the first motor generator 2 can realize steady shunting of the engine 1 and balance torque, and the power of the second motor generator 3 is transmitted to the output shaft 60 or a neutral gear to stop according to a first gear or second gear fixed speed ratio. Under the high-speed cruising mode, the speed of first motor generator 2 can be adjusted to near zero rotational speed, and the power of shunting of first motor generator 2 to engine 1 power is nearly zero, except that first motor generator 2 is for keeping the small loss of shunting balanced torque, engine 1 power almost all directly exports to the wheel through mechanical transmission path, realizes the high-efficient output of engine 1 power output. And the second motor generator 3 can be out of gear and stopped, so that the high-efficiency direct-drive effect of the engine 1 under the condition of medium-high speed cruising is realized.

When the power transmission system is switched between the pure electric drive mode and the power splitting eCTV mode, the second motor generator 3 keeps 1-gear power output under the first-gear pure electric drive mode, the engine 1 is stopped statically, the first motor generator 2 regulates speed, and the rotating speed of the connecting shaft 40 is synchronous with the power input driving gear 31; after the first motor generator 2 is unloaded, the first shifting device k1 connects the connecting shaft 40 with the power input driving gear 31; the first motor generator 2 regulates the speed to quickly start the engine 1 to a required speed, and the engine 1 is ignited and loaded, so that the 1-gear pure electric EV1 is smoothly switched to a power splitting eCTV 1 mode. Likewise, a shift of the 2-gear electric-only EV2 into power-split eCVT2 mode may be implemented.

On the contrary, in the eCTV 1 mode, the power output of the second motor generator in the 1-gear is kept, the engine 1 is unloaded, the first motor generator 2 exits the speed regulation mode, and the first gear shifting device k1 enters the neutral gear, so that the 1-gear power splitting eCTV 1 mode is smoothly switched to the 1-gear pure electric drive EV 1. Similarly, a smooth shift of the 2-gear power split eCVT2 mode to the 2-gear electric-only drive EV2 may be achieved.

The mode is switched from the 1-gear eCTT 1 mode to the eCTT 2 mode, the second motor generator 3 is required to keep 1-gear pure electric drive, the engine 1 and the first motor generator 2 are unloaded, the first gear shifting device k1 is switched to connect the output shaft 60 with the connecting shaft 40, the first motor generator 2 is used for speed regulation and shunting of the engine 1, after the mode enters the 3-gear power shunting eCTT 3 mode, the engine 1 is kept driven, the second motor generator 3 is unloaded, the second gear shifting device k2 is switched to enter the 2-gear, the output shaft 60 is connected with the output shaft second input gear 62b, and the second motor generator 3 is driven in the 2-gear; then the engine 1 and the first motor generator 2 are unloaded, the first gear shifting device k1 switches to connect the connecting shaft 40 with the power input driving gear 31, the first motor generator 2 is used for speed regulation and shunting, the engine 1 is loaded, and therefore the eCTV 1 is smoothly switched to enter the eCTV 3 and then enter the eCTV 2; conversely, a smooth shift of the eCTV 2 into the eCTV 3 and then into the eCTV 1, and the 3-gear power split eCTV 3 mode is always used as an intermediate shift link for achieving the smooth shift.

According to the power transmission system, the connection between the engine 1 and the transmission system is simplified, a clutch of a traditional gearbox is not needed, the reliability of the hybrid system is greatly improved, and after-sales service cost brought by the clutch is eliminated. The mass flywheel connecting the engine 1 with the gearbox can be simplified and only a shock absorber is required.

The method is suitable for light commercial vehicles, power-split stepless speed regulation control of three gears is provided, and direct-drive virtual gear driving of the engine 1 with three fixed speed ratios can be realized as long as the speed regulation of the first motor generator 2 is kept near zero rotating speed.

The second motor generator 3 provides two-gear drive, and the torque demand of the second motor generator 3 is reduced, which is favorable for reducing the volume and cost of the second motor generator 3. In addition, the second motor generator 3 can be out of gear and stopped in a 3-gear power split eCTV 3 mode, all related gear transmission mechanisms linked with the second motor generator 3 are static, and only the engine 1, the first motor generator 2, the planetary gear mechanism 4, the connecting shaft 40 and the output shaft 60 are linked, so that the loss of a transmission system is reduced, and the hybrid system is favorable for providing a high-efficiency direct driving function of the engine 1 for medium-high speed driving. The hybrid system can be suitable for urban congestion working conditions and also suitable for medium-high speed continuous driving working conditions. Particularly, due to the eCCT driving mode of 3 gears, the traction driving capability can be greatly improved, so that overload and heavy-load driving of the light commercial vehicle can be met.

According to an embodiment of the present invention, the power transmission system further includes a sub-transmission mechanism 200, the sub-transmission mechanism 200 including a sub-transmission input shaft 60a, the sub-transmission input shaft 60a being connected with the output shaft 60; a sub-transmission output gear 61 is provided on the sub-transmission input shaft 60 a; the sub-shift intermediate shaft 70 and a sub-shift intermediate shaft input gear 70a provided on the sub-shift intermediate shaft 70, the sub-shift intermediate shaft input gear 70a meshing with the sub-shift output gear 61, the sub-shift intermediate shaft 70 further having a sub-shift intermediate shaft output gear 70b, the sub-shift transmission mechanism 200 further including a sub-shift output shaft 80, the sub-shift output shaft 80 being provided with a sub-shift output shaft input gear 82 meshing with the sub-shift intermediate shaft output gear 70 b. A third shift device k3 is provided on the range output shaft 80, and the third shift device k3 selectively engages the range input shaft 60a with the range output shaft 80 or the range output shaft input gear 82 with the range output shaft 80. The auxiliary transmission mechanism 200 can realize the amplification of two times of transmission speed ratio, and not only realizes the 6-gear power division of a power transmission system and the virtual direct drive function of the 6-gear engine 1.

The vehicle according to the present invention is briefly described below.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.

In the description of the present invention, "a plurality" means two or more.

In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.

In the description of the utility model, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A powertrain system for a vehicle, comprising:

the engine is provided with a first power input shaft, the first motor generator is provided with a second power input shaft, and the second motor generator is provided with a third power input shaft;

a planetary gear mechanism provided with a sun gear, a carrier, and a ring gear that are fitted to each other, the first power input shaft and the second power input shaft being linked with any two of the sun gear, the carrier, and the ring gear, respectively, and another one of the sun gear, the carrier, and the ring gear being configured as an output end of the planetary gear mechanism;

a transmission, the transmission comprising:

the connecting shaft is linked with the output end of the planetary gear mechanism;

an intermediate shaft in linkage with the third power input shaft and selectively in linkage with the connecting shaft;

an output shaft selectively coupled to the connecting shaft and/or the intermediate shaft.

2. The powertrain system for a vehicle according to claim 1, wherein the second power input shaft is arranged in parallel with the first power input shaft.

3. The powertrain system for a vehicle according to claim 2, wherein the third power input shaft is arranged in parallel with the intermediate shaft.

4. The drivetrain for a vehicle according to claim 3, wherein the first power input shaft is connected to the planet carrier and the second power input shaft is linked to the sun gear.

5. The drivetrain of claim 4, wherein a power input drive gear is idler mounted on the connecting shaft, the power input drive gear selectively engageable with the connecting shaft and operatively coupled to the intermediate shaft.

6. The powertrain system for a vehicle according to claim 5, wherein a first shifting device selectively engaging the power input driving gear with the connecting shaft or the connecting shaft with the output shaft is provided on the connecting shaft.

7. The powertrain system for a vehicle according to claim 6, wherein a countershaft input gear is provided on the countershaft, the countershaft input gear being in meshing engagement with the power input drive gear; an output shaft input gear which can be selectively jointed with the output shaft is sleeved on the output shaft, an intermediate shaft output gear is further arranged on the intermediate shaft, and the intermediate shaft output gear is meshed with the output shaft input gear.

8. The powertrain system for a vehicle of claim 7, wherein the countershaft output gears and the output shaft input gears are configured in a one-to-one correspondence of multiple pairs.

9. The powertrain system for a vehicle of claim 8, wherein the output shaft input gear comprises: an output shaft first input gear and an output shaft second input gear; the countershaft output gear includes: an intermediate shaft first output gear and an intermediate shaft second output gear; the output shaft first input gear and the output shaft second input gear are correspondingly meshed with the intermediate shaft first output gear and the intermediate shaft second output gear.

10. A vehicle characterized by comprising the power transmission system according to any one of claims 1 to 9.