CN201437325U - hybrid drive system - Google Patents

Abstract

The utility model provides a hybrid drive system, which belongs to the technical field of hybrid power. It solves the problem that the existing hybrid drive system is not only complex in structure, but also relatively high in implementation cost. The hybrid drive system includes an engine, a first motor and a second motor capable of converting electrical energy and mechanical energy, and the motor shaft one of the first motor, the motor shaft two of the second motor and the output shaft of the engine are on the same straight line , the output shaft of the engine is fixedly connected with the motor shaft 1, and a clutch mechanism is set between the motor shaft 1 and the motor shaft 2 to control the connection or disconnection of the motor shaft 1 and the motor shaft 2, and the hybrid drive system outputs power from the motor shaft 2 , a storage battery is electrically connected between the first motor and the second motor. The hybrid driving system has a simple structure, is easy to implement, and can realize industrialization.

Description

hybrid drive system

technical field

The utility model belongs to the technical field of hybrid power, and relates to a driving system of hybrid power.

Background technique

Due to the environmental pollution and energy consumption of fuel-powered vehicles, electric vehicles and hybrid vehicles have become one of the hot spots in the development of the automotive field.

There are mainly three structural forms of the power system of the current hybrid electric vehicle, one is the "parallel mode" in which the engine is the main power and the electric motor is the auxiliary power. The other is the "series and parallel mode" in which only electric motors are used to drive at low speeds, and the engine and electric motors are driven together when the speed increases. There is also a "tandem mode" of electric vehicles driven only by electric motors.

Among them, the second "series and parallel connection method" only relies on the electric motor to drive when starting and low speed. When the speed increases, the engine and the electric motor share the power efficiently. This method requires power sharing devices and generators. Currently, The commonly used power sharing device is a planetary gear mechanism.

A kind of hybrid electric vehicle drive system as disclosed in the Chinese patent, its publication number is CN101204920A, and this system comprises the engine and motor that provide power for transmission device, is used for receiving the generator of engine power generation, and is electrically connected between generator and The power supply between the electric machines, wherein the system also includes a dual clutch connected between the engine and the generator and transmission for selectively transferring power from the engine to the generator or transmission. When the vehicle is running at low speed, the dual clutch is controlled so that the power of the engine is transmitted to the generator to generate electricity, and the motor receives electric energy and outputs mechanical energy to the transmission to drive the vehicle, thereby realizing the serial drive of the hybrid vehicle. When the vehicle is running at high speed, the double clutch is controlled so that the power of the engine is directly transmitted to the transmission device to drive the vehicle. The system also includes a planetary gear mechanism. When the vehicle needs more power such as accelerating or climbing, the power of the engine can be distributed through the planetary gear mechanism, so that part of the power is transmitted to the transmission and the other part is transmitted to the generator. Generate electricity, store the generated electric energy in the power supply and supply power to the motor from the power supply, so that the motor can transmit kinetic energy to the transmission device. In this case, although the hybrid drive mode of the vehicle can be realized simply, the structure is complicated and the implementation cost is relatively high due to the addition of a planetary gear mechanism for power sharing.

Contents of the invention

The purpose of this utility model is to solve the above-mentioned problems existing in the existing hybrid power, and propose a hybrid power drive system that can realize power sharing without a planetary gear mechanism and realize the dual drive mode of pure electric drive and hybrid drive. It has the advantages of simple structure and easy implementation.

The purpose of the utility model can be achieved through the following technical solutions: a hybrid drive system, the system includes a motor and a first motor and a second motor that can convert electrical energy and mechanical energy, it is characterized in that the first motor The motor shaft one of the second motor, the motor shaft two of the second motor and the output shaft of the engine are on the same straight line, the output shaft of the engine is connected with the motor shaft one, and there is a control motor shaft one A clutch mechanism connected or disconnected from the second motor shaft, the hybrid drive system outputs power from the second motor shaft, and a storage battery is electrically connected between the first motor and the second motor.

When the vehicle is running with a low load and the energy of the battery is sufficient, the clutch mechanism disconnects the motor shaft 1 from the motor shaft 2, the second motor works, and the motor shaft 2 outputs power to the transmission gear, which drives the vehicle to run by the transmission gear and reducer, and the engine With the first motor not working, the vehicle can be driven in a purely electric state.

When the vehicle is running with a low load and the energy of the storage battery is lower than a certain limit value, the first motor starts the engine. Once the engine works, the first motor will turn from the electric state to the power generation state quickly, and the engine will drive the first electric motor to generate electricity to charge the vehicle battery, and the clutch mechanism will still be disconnected. At this time, the engine drives the first motor to generate electricity to charge the battery, and the battery provides electric energy to the second motor, so that the power, the first motor, the battery, and the whole hybrid drive of the second motor are connected in series. In this process, the first motor is used as a motor to start the engine in the early stage, and is used as a generator in the later stage, and the second motor is used as a motor.

When the vehicle is driving at high speed or climbing a slope, the output power of the second motor is insufficient, and the clutch mechanism is controlled to connect the first motor shaft and the second motor shaft, and the output shaft of the engine drives the first motor shaft and the second motor shaft to rotate synchronously, and the power generated by the engine can be fully Directly drive the vehicle or distribute the power to the generator to generate electricity and drive the vehicle to meet the different power requirements of the vehicle.

In the above hybrid drive system, the clutch mechanism is a clutch.

When the clutch is disengaged, the electric energy output by the first electric motor is stored in the storage battery, and the electric energy is supplied to the second electric motor by the storage battery. The first motor shaft and the second motor shaft are on the same axis. When the clutch is engaged, the first motor shaft and the second motor shaft are connected to rotate synchronously, and the engine, the first motor and the second motor work synchronously.

In the above hybrid drive system, the first motor and the second motor are the same. The first motor and the second motor are the same and can realize mutual conversion, and both have the same power. When the first motor generates electricity, the second motor drives the second motor shaft to rotate.

In the above-mentioned hybrid drive system, the clutch includes a driving part and a driven part oppositely arranged, the driving part is connected to the first motor shaft, and the driven part is connected to the second motor shaft.

Compared with the prior art, the engine of the hybrid drive system drives the motor shaft one to rotate to control the driving of the vehicle, and utilizes the clutch relationship between the motor shaft one and the motor shaft two to realize the power distribution of the engine, and the structure is simple , easy to implement, and can realize industrialization.

Description of drawings

FIG. 1 is a schematic structural diagram of the hybrid drive system.

In the figure, 1, engine; 1a, output shaft; 2, first motor; 3, second motor; 4, clutch; 41, driving part 42, driven part; 5, motor shaft one; 6, motor shaft two; 7. Battery; 8. Transmission gear; 9. Reducer.

Detailed ways

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

As shown in Figure 1, this hybrid power drive system comprises engine 1 and same first motor 2 and second motor 3, motor shaft one 5 of first motor 2, motor shaft two 6 of second motor 3 and engine 1 The three shafts of the output shaft 1a are concentric, and the output shaft 1a is fixedly connected with the motor shaft one 5 . A normally open clutch 4 is arranged between the first motor shaft 5 and the second motor shaft 6, the combination and disconnection of the controllable motor shaft one 5 and the second motor shaft 6, the first motor 2 and the second motor 3 are electrically connected with Battery 7. The clutch 4 includes a driving part 41 and a driven part 42 oppositely arranged, the driving part 41 is connected with the first motor shaft 5 , and the driven part 42 is connected with the second motor shaft 6 .

When the vehicle runs with a low load and the energy of the storage battery 7 is sufficient, the active part 41 and the driven part 42 are separated, and the first motor shaft 5 is disconnected from the second motor shaft 6 . The second motor 3 works, the output power of the motor shaft 2 drives the transmission gear 8 connected with the motor shaft 2 to move, and the transmission gear 8 and the speed reducer 9 drive the wheels to rotate, and the engine 1 and the first motor 2 do not work, so as to realize the vehicle pure Driving in electric state.

When the vehicle is running with a low load and the energy of the storage battery 7 is lower than a certain limit, the first motor 2 starts the engine 1 . Once the engine 1 works, the first motor 2 will turn from the electric state to the power generation state quickly, and the output shaft of the engine 1 will drive the motor shaft to rotate, and the first motor 2 will generate electricity to charge the battery 7 of the vehicle. Motor shaft two 6 is still disconnected. The power generated by the engine 1 is transmitted to the first motor 2 for power generation, and the generated electric energy is stored in the battery 7, and then the battery 7 supplies power to the second motor 3, and the second motor 3 receives electric energy and outputs mechanical energy to the transmission gear 8 to drive the vehicle . In this way, the engine 1 , the first motor 2 , the storage battery 7 , and the second motor 3 are connected in series to drive the hybrid power. In this process, the first motor 2 is used as a motor in the early stage, and used as a generator in the later stage, and the second motor 3 is used as a motor.

When the vehicle is running at high speed or climbing a slope, the output power of the second motor 3 is insufficient, the driving part 41 and the driven part 42 are sucked together, and the first motor shaft 5 and the second motor shaft 6 are connected together to rotate synchronously. The engine 1 , the first motor 2 and the second motor 3 work synchronously to drive the vehicle to meet the high power requirement of the vehicle. Part of the power output by the engine 1 from the output shaft is supplied to the first motor 2 to generate electricity, and part of it is transmitted to the motor shaft 2 6 through the driving member 41 and the driven member 42 for driving the vehicle. The power of the first motor 2 and the second motor 3 are the same, so that the first motor shaft 5 and the second motor shaft 6 which are respectively connected by the two motors can smoothly realize synchronous rotation.

When the power generated by the engine 1 was just the same as the required power for the vehicle, the power generated by the engine 1 was all transmitted to the motor shaft 2 6 to drive the vehicle, and the first motor 2 and the second motor 3 realized idling.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Claims (4)

1. hybrid electric drive system, this system comprises driving engine (1) and can carry out electric energy and first motor (2) and second motor (3) of mechanical energy conversion, it is characterized in that, the motor shaft one (5) of described first motor (2), three axles of output shaft (1a) of the motor shaft two (6) of second motor (3) and driving engine (1) are on the same straight line, the output shaft (1a) of driving engine (1) is connected with motor shaft one (5), being provided with control motor shaft one (5) between motor shaft one (5) and the motor shaft two (6) is connected or open circuited engaging and disengaging gear with motor shaft two (6), described hybrid electric drive system is gone up outputting power from motor shaft two (6), is electrically connected with storage battery (7) between first motor (2) and second motor (3).

2. hybrid electric drive system according to claim 1 is characterized in that, described engaging and disengaging gear is power-transfer clutch (4).

3. hybrid electric drive system according to claim 1 and 2 is characterized in that, described first motor (2) is identical with second motor (3).

4. hybrid electric drive system according to claim 2, it is characterized in that, described power-transfer clutch (4) comprises the driving link (41) and the driven member (42) of phase opposite disposed, and described driving link (41) is connected with motor shaft one (5), and driven member (42) is connected with motor shaft two (6).

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