CN210706869U

CN210706869U - Transmission for hybrid vehicle

Info

Publication number: CN210706869U
Application number: CN201921371416.9U
Authority: CN
Inventors: 韩军伟; 钟发平; 张彤; 徐世锋; 张静; 孙哲浩; 庞雷保
Original assignee: Corun Hybrid Power Technology Co Ltd
Current assignee: Jiangxi Dingsheng New Material Technology Co ltd
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2020-06-09
Anticipated expiration: 2029-08-22

Abstract

The utility model provides a transmission device for a hybrid vehicle, a motor shaft of a small motor is respectively connected with one side of a first clutch and a gear ring of a single planet row, the other side of the first clutch is connected with an output shaft of an engine, a planet carrier of the single planet row is connected with one side of a third clutch, a sun gear of the single planet row is respectively connected with one side of a second clutch and one side of a brake, the other side of the second clutch is connected with the gear ring of the single planet row, the other side of the brake is fixed on a gearbox shell, the other side of the third clutch is connected with an intermediate gear, a reduction pinion is connected with a reduction gear wheel through a connecting shaft to form a reduction gear pair, the reduction gear wheel is meshed with a driving gear of a large motor, the driving gear of the large motor is connected with a motor shaft of a large motor, the reduction pinion is respectively meshed with the intermediate gear and, the differential transmits power to the wheels. The utility model discloses simple structure realizes the platformization and uses, has with low costs advantage.

Description

Transmission for hybrid vehicle

Technical Field

The present invention relates to a transmission for a vehicle, and more particularly to a transmission for a hybrid vehicle.

Background

The shortage of petroleum, environmental pollution and climate warming are common challenges facing the global automobile industry, the development of new energy automobiles becomes a trend, and the new energy automobiles will certainly become a hotspot for the development of the 21 st century automobile industry. In the existing new energy automobile, a hybrid power system which is mature in technology becomes a feasible technical scheme for solving the problems of automobile energy consumption and environmental pollution at the present stage, a core power transmission device of the existing new energy automobile also becomes a key point of the current research and development, and the transmission device can meet the power requirement of the hybrid power automobile and reduce certain manufacturing cost at the same time by researching the components of the transmission device and the connection relation and layout among the components.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple structure is compact, realize that the platformization is used, have the transmission for hybrid vehicle of lower cost advantage.

The method is realized by the following scheme:

a transmission device for a hybrid vehicle comprises an engine, a small motor EM1, a large motor EM2, a differential, a brake B1, a first clutch C0, a second clutch C1, a third clutch C2, a single-row planetary gear, a reduction pinion and a reduction gear wheel, wherein a motor shaft of the small motor EM1 is respectively connected with one side of the first clutch C0 and a gear ring of the single-row planetary gear, the other side of the first clutch C0 is connected with an output shaft of the engine, a planet carrier of the single-row planetary gear is connected with one side of the third clutch C2, a sun gear of the single-row planetary gear is respectively connected with one side of the second clutch C1 and one side of the brake B1, the other side of the second clutch C1 is connected with the gear ring of the single-row planetary gear, the other side of the brake B1 is fixed on a gearbox shell, the other side of the reduction clutch C2 is connected with an intermediate gear wheel, and the pinion is connected with the reduction gear wheel through a connecting shaft to form a reduction gear pair, the reduction gear wheel is meshed with a large motor driving gear, the large motor driving gear is connected with a motor shaft of a large motor EM2, the reduction pinion is respectively meshed with a middle gear and a main reduction gear on a differential, and the differential transmits power to wheels.

Further, the engine, the first clutch C0, the small electric machine EM1, the second clutch C1, the brake B1, the third clutch C2 and the large electric machine EM2 are coaxially arranged in sequence.

Further, the first clutch C0, the second clutch C1, the third clutch C2 and the brake B1 all adopt a plurality of wet friction plates.

As known in the art, a single planetary row generally includes a sun gear, a planetary gear, a planet carrier, and a ring gear, the planetary gear is mounted on the planet carrier, and the planetary gear is engaged with the sun gear and the ring gear respectively.

The utility model discloses a transmission for hybrid vehicle, simple structure, compactness are a technical scheme of platformization, have following advantage:

1. when the vehicle runs in the electric-only mode, the electric-only driving mode of the large motor EM2 can be realized through the opening control of the first clutch C0, the second clutch C1, the third clutch C2 and the brake B1;

2. when the vehicle stops, a stable-speed power generation mode can be realized by closing the first clutch C0, and the mechanical energy of the engine ICE is converted into electric energy through the small motor EM1 and stored in the battery pack, so that the transmission device of the utility model can realize a range extending function during driving;

3. when the vehicle runs in a hybrid power mode, the engine can be coupled with the large motor and the small motor by opening or closing the first clutch C0, the second clutch C1, the third clutch C2 and the brake B1, and finally the power is output to the differential and is transmitted to wheels to drive the vehicle to run;

4. the utility model discloses transmission has with low costs advantage, can improve the efficiency of economizing on fuel, can be applied to degree of depth hybrid system simultaneously and insert electric hybrid system, is a platformized drive scheme.

Drawings

Fig. 1 is a schematic configuration diagram of a transmission device for a hybrid vehicle in embodiment 1.

Detailed Description

The embodiment is only for illustrating one implementation of the present invention, and is not to be taken as a limiting illustration of the protection scope of the present invention.

Example 1

A transmission device for a hybrid vehicle is disclosed, as shown in FIG. 1, and comprises an engine ICE, a small electric machine EM1, a large electric machine EM2, a differential 1, a brake B1, a first clutch C0, a second clutch C1, a third clutch C2, a single planet row PGS, a reduction pinion 2 and a reduction bull gear 3, wherein the first clutch C0, the second clutch C1, the third clutch C2 and the brake B1 all adopt a plurality of wet friction plates, the single planet row PGS comprises a sun gear S, planet gears P, a planet carrier PC and a gear ring R, the planet gears P are arranged on the planet carrier PC, the planet gears P are respectively meshed with the sun gear S and the gear ring R, a motor shaft of the small electric machine EM1 is respectively connected with one side of the first clutch C0, the gear ring R of the single planet carrier row PGS, the other side of the first clutch C0 is connected with an output shaft of the engine ICE, the planet carrier PC of the single planet carrier PGS is connected with one side of the third clutch C2, the sun gear S of the single planet row PGS is respectively connected with one side of a second clutch C1 and one side of a brake B1, the other side of the second clutch C1 is connected with a gear ring R of the single planet row PGS, the other side of the brake B1 is fixed on a gearbox shell 5, the other side of a third clutch C2 is connected with an intermediate gear 6, a reduction pinion 2 is connected with a reduction gear 3 through a connecting shaft 7 to form a reduction gear pair 4, the reduction gear 3 is meshed with a large motor driving gear 8, the large motor driving gear 8 is connected with a motor shaft of a large motor EM2, the reduction pinion 2 is respectively meshed with the intermediate gear 6 and a main reduction gear 9 on a differential 1, and the differential 1 transmits power to wheels 10; the engine ICE, the first clutch C0, the small motor EM1, the second clutch C1, the brake B1, the third clutch C2 and the large motor EM2 are coaxially arranged in sequence.

The mechanical energy of the engine ICE is converted into electric energy through the small motor EM1 and stored in the battery pack by closing the first clutch C0, so that the electric energy is continuously provided for the large motor EM2, and the engine ICE can be always in the most efficient range in the power generation process of the small motor EM1, so that the oil saving performance of the transmission device is improved. The large motor EM2 can directly transmit power to wheels through a differential after speed reduction and torque increase of a reduction gear pair.

The utility model discloses a power coupling device constitute for solitary single planet row PGS, and the moment of torsion of two power supply inputs of engine ICE, small motor EM1 is exported after the coupling of single planet row PGS. During actual driving of the vehicle, the combined use of the power sources and the shifting elements (clutches, brakes) results in a plurality of different operating modes. The operation in the electric-only drive and the hybrid drive will be described below, and the control relationship between the respective operation modes and the shift elements is shown in table 1, where good represents the open state and ● represents the closed state.

TABLE 1 control relationship between the various operating modes of the transmission and the shifting elements

Mode of operation	B1	C0	C1	C2
					EV-1	〇	〇	〇	〇
EV-2	●	〇	〇	●
					EV-3	〇	〇	●	●
HEV-1	●	●	〇	●
					HEV-2	〇	●	〇	●
HEV-3	〇	●	●	●
					HEV-4	〇	●	〇	〇

In the pure electric mode, the first clutch C0, the second clutch C1, the third clutch C2 and the brake B1 are controlled to be opened, the large motor EM2 is adopted for independent driving, the large motor EM2 directly transmits power to wheels through a speed reduction gear pair, and the mode is defined as a first-gear pure electric driving mode, namely a fixed transmission ratio pure electric mode EV-1.

The first clutch C0 and the second clutch C1 are opened and the brake B1 and the third clutch C2 are closed, simultaneously driven with the small electric machine EM1 and the large electric machine EM2, which is defined as a second gear electric only drive mode EV-2. In this drive mode, the transmission is able to output a large drive torque.

The brake B1 and the first clutch C0 are opened, and the second clutch C1 and the third clutch C2 are closed, and the small electric machine EM1 and the large electric machine EM2 are simultaneously driven, and the mode is defined as a third-gear electric-only driving mode EV-3.

In the hybrid state, the second clutch C1 is controlled to be opened, the brake B1, the first clutch C0 and the third clutch C2 are controlled to be closed, the engine ICE and the large electric machine EM2 are jointly driven, and a large torque can be output in the fixed gear ratio mode, which is defined as a first-gear hybrid driving mode HEV-1, and the mode can be used in the vehicle hill-climbing starting situation and the like as a large torque driving mode in the hybrid mode.

When the vehicle speed is high, the brake B1 and the second clutch C1 are controlled to be opened, the first clutch C0 and the third clutch C2 are controlled to be closed, the engine ICE and the large electric machine EM2 are jointly driven, a high rotating speed can be output in the mode, meanwhile, the small electric machine EM1 can participate in the work, and the mode is defined as a second gear hybrid power driving mode HEV-2. This mode is used as a high rotational speed drive mode in the hybrid mode at a high vehicle speed.

In the hybrid driving mode, the brake B1 is controlled to be opened, the first clutch C0, the second clutch C1 and the third clutch C2 are controlled to be closed, the engine ICE is adopted to drive together with the large electric machine EM2, and the small electric machine EM1 can also participate in the operation, and the mode is defined as a third-gear hybrid driving mode HEV-3. This mode is used as a high rotational speed drive mode in the hybrid mode at a high vehicle speed.

In the hybrid drive mode, the brake B1, the second clutch C1 and the third clutch C2 are controlled to be opened, and the first clutch C0 is controlled to be closed, so that the range extending function can be realized, and the mode is defined as a fourth-gear hybrid drive mode HEV-4. The mode adopts a large motor EM2 to drive independently, the large motor EM2 directly transmits power to wheels through a differential gear pair, and meanwhile, an engine ICE outputs power to directly drive a small motor EM1 to generate power and store the power into a battery pack.

Claims

1. A transmission for a hybrid vehicle, characterized in that: the hybrid power transmission device comprises an engine, a small motor (EM1), a large motor (EM2), a differential, a brake (B1), a first clutch (C0), a second clutch (C1), a third clutch (C2), a single planet row, a reduction pinion and a reduction gear wheel, wherein a motor shaft of the small motor (EM1) is respectively connected with one side of the first clutch (C0) and a gear ring of the single planet row, the other side of the first clutch (C0) is connected with an output shaft of the engine, a planet carrier of the single planet row is connected with one side of the third clutch (C2), a sun gear of the single planet row is respectively connected with one side of the second clutch (C1) and one side of the brake (B1), the other side of the second clutch (C1) is connected with the gear ring of the single planet row, the other side of the brake (B1) is fixed on a speed change box shell, and the other side of the third clutch (C2) is connected with an intermediate gear, the reduction pinion is connected with the reduction gear wheel through a connecting shaft to form a reduction gear pair, the reduction gear wheel is meshed with a large motor driving gear, the large motor driving gear is connected with a motor shaft of a large motor (EM2), the reduction pinion is respectively meshed with a middle gear and a main reduction gear on a differential, and the differential transmits power to wheels.

2. The transmission for a hybrid vehicle according to claim 1, characterized in that: the engine, the first clutch (C0), the small motor (EM1), the second clutch (C1), the brake (B1), the third clutch (C2) and the large motor (EM2) are sequentially and coaxially arranged.

3. The transmission for a hybrid vehicle according to claim 1 or 2, characterized in that: the first clutch (C0), the second clutch (C1), the third clutch (C2) and the brake (B1) are all multi-plate wet friction plates.