CN102941801A - Drive device of hybrid car - Google Patents

Abstract

The invention discloses a drive device of a hybrid car. The drive device comprises a mechanical power output device, a first motor and a second motor. The drive device of the hybrid car further comprises a planet gear structure provided with a sun gear, a planet gear frame installed with a planet gear and an outer gear ring; one end of a motor shaft of the first motor is connected with an output shaft of the mechanical power output device while the other end of the motor shaft of the first motor is connected with the planet gear frame of the planet gear structure via a first clutch; the second motor is connected with a total output shaft which is fixedly connected with the sun gear and provided with an output gear via a second clutch; and a brake for locking the outer gear ring and a third clutch for locking or unlocking the sun gear and the outer gear ring are arranged on the planet gear structure. Through the integration of the mechanical power output device and motors by the planet gear structure, the drive device of the hybrid car can realize a plurality of working modes, has a simple structure and is suitable for hybrid cars so that the cost is reduced.

Description

Hybrid drive

technical field

The invention belongs to the field of vehicles, and relates to a driving device, in particular to a hybrid electric vehicle driving device.

Background technique

Hybrid vehicle adopts mechanical power and electric energy to drive, and it can combine the advantages of both, improve the fuel economy of vehicle, reduce emission and fuel consumption. The driving device of the existing hybrid electric vehicle can be driven separately by mechanical power or electric energy, or both can be jointly driven, and the braking can also be converted into electric energy for storage when braking. Due to the fact that most of the current domestic hybrid vehicles are improved designs on the original models, the structure of the driving device is complicated, the layout is not compact, and the cost is high. Moreover, the driving devices of the existing hybrid vehicles have fewer working modes and cannot be flexibly operated. Switch to suit different working conditions.

Contents of the invention

The technical problem to be solved by the present invention is to provide a driving device for a hybrid electric vehicle, which can switch multiple working modes between electric power and mechanical power, and has a simple structure and low cost.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A driving device for a hybrid electric vehicle, comprising a mechanical power output device, a first motor, a second motor, and a planetary gear structure having a sun gear, a planetary gear carrier on which a planetary gear is installed, and an outer ring gear;

One end of the motor shaft of the first motor is connected to the output shaft of the mechanical power output device, and the other end is connected to the planetary gear frame of the planetary gear structure through the first clutch;

The second motor is connected to the total output shaft fixedly connected to the sun gear and provided with the output gear through the second clutch, and the planetary gear structure is provided with a brake for locking the outer ring gear and connecting the sun gear and the outer gear. Phase-to-phase locking or unlocking of the third clutch.

As a limitation of the present invention, the mechanical power output device is an engine.

As a limitation of the present invention, a reduction gear set is provided between the total output shaft and the differential of the hybrid vehicle.

As a further limitation of the present invention, the reduction gear set is a two-stage reduction gear set.

Due to the adoption of the above-mentioned technical solution, the technical progress achieved by the present invention compared with the prior art lies in that the hybrid vehicle drive device provided by the present invention integrates the mechanical power output device and the motor through the planetary gear structure, and can Multiple working modes are realized, the structure is simple, and the cost is low.

The invention is suitable for hybrid vehicles to reduce costs.

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

In the figure: 1-engine, 2-first motor, 3-first clutch, 4-second motor, 5-second clutch, 6-sun gear, 7-planetary gear carrier, 8-outer ring gear, 9- Brake, 10-the third clutch, 11-differential, 12-total output shaft, 13-output gear.

Detailed ways

Example

As shown in FIG. 1 , this embodiment discloses a driving device for a hybrid electric vehicle, which includes a mechanical power output device, a first motor 2 and a second motor 4 , and a planetary gear structure.

The mechanical power output device adopts the engine 1 used in automobiles. The motor shaft of the first motor 2 is in the form of two ends extending out, one end of which is connected to the output shaft of the engine 1, and the other end is connected to the planetary shaft through the first clutch 3. The planetary carrier 7 of the wheel structure is connected. When the first clutch 3 is in the combined state, the motor shaft of the first motor 2 is fixed with the planetary wheel carrier 7, and can transmit power to the planetary wheel carrier 7. When the first clutch 3 is in the disengaged state, the planetary wheel carrier 7 and the planetary wheel carrier The first motor 2 is disconnected.

The sun gear 6 of the planetary gear structure is fixedly connected with the total output shaft 12 as a whole, an output gear 13 is arranged on the total output shaft 12 for power output, and the second motor 4 is connected to the total output shaft 12 through the second clutch 5 Above, when the second clutch 5 is engaged, the second motor 4 can directly output power to the total output shaft 12 . A brake 9 is also arranged on the planetary gear structure, and the brake 9 can lock the outer ring gear 8 of the planetary gear structure so that it cannot rotate. A third clutch 10 is arranged between the sun gear 6 and the outer ring gear 8. When the third clutch 10 is combined, the sun gear 6 and the outer ring gear 8 can be locked together. When the third clutch 10 is in an open state, the sun gear 10 Wheel 6 and external ring gear 8 can move freely. The total output shaft 12 is used to provide power to the differential 11 of the hybrid vehicle, and a two-stage reduction gear set is arranged between the differential 11 and the total output shaft 12 to increase torque.

The driving device of the hybrid electric vehicle adopts such a configuration form, so that the vehicle can switch between various working modes under the control strategy preset by the ECU, so as to achieve the purpose of saving fuel and improving driving experience.

It can adopt seven working modes, which are described as follows:

(1) High-speed engine driving mode

Combine the first clutch 3 and the brake 9. At this time, the engine 1 is in the working state, and the power is transmitted from the engine 1 and the first motor 2 to the planetary carrier 7 through the first clutch 3. At this time, the sun gear 6 rotates at a high speed. Drive total output shaft 12 and carry out high-speed rotation.

(2) Engine low-speed driving mode

Combining the first clutch 3 and the third clutch 10, the engine 1 is in the working state, and the power is transmitted from the engine 1 and the first motor 2 to the planetary gear carrier 7 through the first clutch 3. At this time, the sun gear 6 rotates at a low speed, driving The total output shaft 12 rotates at a low speed.

(3) Pure electric drive mode

The second clutch 5 is engaged, and the second motor 4 is in the working state. At this moment, the power is transmitted from the second motor 4 to the total output shaft 12 through the second clutch 5 .

(4) Extended range mode

Combining the second clutch 5, the engine 1 drives the first motor 2 to generate electricity, part of the electric energy is sent to the second motor 4 for driving, and part of it is stored in the battery.

(5) Hybrid drive high speed mode

Combining the first clutch 3 , the second clutch 5 and the brake 9 , the engine 1 and the motor 2 work simultaneously to output power to the total output shaft 12 .

(6) Hybrid drive low speed mode

Combining the first clutch 3 , the second clutch 5 and the third clutch 10 , the engine 1 and the motor 2 work simultaneously to output power to the total output shaft 12 .

(7) Braking capacity recovery mode

When the second clutch 5 is combined, when braking or going downhill, the total output shaft 12 drives the second motor 4 to generate electricity and store electric energy in the battery.

The above several working modes are automatically switched according to the preset control strategy under the control of the ECU, and can be automatically switched to the best working mode according to the road conditions and the running status of the vehicle, so as to achieve the best fuel saving purpose.

Claims (4)

1. A drive unit for a hybrid electric vehicle, comprising a mechanical power take-off, a first motor and a second motor, characterized in that: It also includes a planetary gear structure with a sun gear, a planetary gear carrier on which the planetary gears are mounted, and an outer ring gear; One end of the motor shaft of the first motor is connected to the output shaft of the mechanical power output device, and the other end is connected to the planetary gear frame of the planetary gear structure through the first clutch; The second motor is connected to the total output shaft fixedly connected to the sun gear and provided with the output gear through the second clutch, and the planetary gear structure is provided with a brake for locking the outer ring gear and connecting the sun gear and the outer gear. Phase-to-phase locking or unlocking of the third clutch. 2. The driving device for a hybrid electric vehicle according to claim 1, wherein the mechanical power output device is an engine. 3. The driving device for a hybrid electric vehicle according to claim 1 or 2, characterized in that: a reduction gear set is provided between the total output shaft and the differential of the hybrid electric vehicle. 4. The hybrid electric vehicle driving device according to claim 3, wherein the reduction gear set is a two-stage reduction gear set.

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