CN102717722A - Auxiliary power unit for electric vehicle - Google Patents

Abstract

The invention proposes an auxiliary power unit for electric vehicles, which belongs to the technical field of electric vehicles, and includes an engine, a driven disk assembly, a pressure plate and a generator; the pressure plate presses the driven disk assembly on the flywheel of the engine to generate electricity The motor is mechanically connected with the driven disk assembly, and converts the mechanical energy of the engine transmitted by the driven disk assembly into electrical energy output. The invention provides an auxiliary power source for pure electric vehicles, which can significantly increase the mileage of electric vehicles and effectively limit the increase of vehicle costs; the engine always works in power generation mode, and the engine is optimized to improve efficiency and reduce emission, and the present invention uses a driven plate assembly in the power system, which reduces the vibration in the power transmission process, avoids the resonance of the auxiliary power unit transmission system, eases the impact, reduces noise, and improves the life of the auxiliary power unit.

Description

Auxiliary power unit for electric vehicle

technical field

The invention belongs to the technical field of electric vehicles and relates to an auxiliary power device for electric vehicles, in particular to an auxiliary power device for electric vehicles using a torsional shock absorber.

Background technique

With the development of the traditional automobile industry, oil resources are becoming increasingly scarce and air quality is deteriorating. In this situation, electric vehicles with obvious energy-saving and environmental protection advantages have become a hot spot in the development of major automobile manufacturers and scientific research institutions in recent years. Electric vehicles are considered to be one of the effective ways to solve the problem of energy shortage and environmental pollution.

At present, the main problems facing the development of electric vehicles: First, the driving range is short. On the one hand, due to the limitation of battery technology, the driving range of most pure electric vehicles is only about 100 kilometers; on the other hand, the construction of charging infrastructure is still far from perfect, which greatly restricts the promotion and use of pure electric vehicles. Second, the cost of electric vehicles is high, and the most important factor affecting the cost is the battery. To increase the driving range of pure electric vehicles, batteries with high performance and capacity must be used, and the cost of electric vehicles will further increase. In this way, there is a contradiction between the mileage and cost, and increasing the mileage will increase the cost, so the range-extended electric vehicle comes into being. By adding a set of auxiliary power devices to the pure electric vehicle, it can effectively extend the continuation of the pure electric vehicle. Driving mileage, while effectively limiting the increase in cost, and the auxiliary power unit has become another research hotspot in the field of electric vehicles. At present, small piston engines are mostly used in auxiliary power units, and the power output of piston engines fluctuates periodically due to the reciprocating motion of the piston. System resonance or premature fatigue failure.

Contents of the invention

Aiming at the problems existing in the prior art, the present invention proposes an auxiliary power unit for electric vehicles. By installing an auxiliary power unit in a pure electric vehicle, the mileage of the vehicle can be effectively extended, and the cost of the whole vehicle will not increase too much. It is conducive to the popularization and use of electric vehicles.

The invention proposes an auxiliary power unit for an electric vehicle, including an engine, a driven disk assembly, a pressure plate and a generator; the pressure plate presses the driven disk assembly on the flywheel of the engine, and the generator and the driven disk assembly Into a mechanical connection, the mechanical energy of the engine transmitted by the driven disc assembly is converted into electrical energy output.

The advantages of the present invention are:

1. An auxiliary power unit for electric vehicles provided by the present invention provides an auxiliary power source for pure electric vehicles, which can significantly increase the driving range of electric vehicles and effectively limit the increase in vehicle costs;

2. In the auxiliary power unit for electric vehicles provided by the present invention, the engine always works in the power generation condition, and the engine is optimized to improve efficiency and reduce emissions.

3. In the auxiliary power unit for electric vehicles provided by the present invention, a driven disc assembly is used in the power system, which reduces the vibration in the power transmission process, avoids the resonance of the auxiliary power unit transmission system, eases the impact, and reduces Noise, improve the life of the auxiliary power unit.

4. The driven plate assembly of the auxiliary power unit for electric vehicles provided by the present invention is equivalent to the driven plate assembly of the traditional automobile dry clutch, and the pressure plate is only the friction transmission of the driven plate assembly. It provides positive pressure and has a simple structure, which can greatly shorten the development cycle and reduce system development costs.

5. The auxiliary power unit for electric vehicles provided by the present invention can also solve the cooling and heating problems of electric vehicles, and can be used in emergency power supply occasions.

Description of drawings

Fig. 1: A schematic structural view of an auxiliary power unit for an electric vehicle proposed by the present invention.

In the figure: 1-engine; 2-engine flywheel; 3-pressure plate; 4-driven disc assembly; 5-generator.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings.

The present invention provides an auxiliary power device for an electric vehicle, as shown in FIG. 1 , which mainly includes an engine 1 , a pressure plate 3 , a driven plate assembly 4 and a generator 5 .

The engine 1 is a traditional internal combustion engine, such as a gasoline engine, a diesel engine or other fuel engines, which is the main power source of the auxiliary power unit for electric vehicles, and is mechanically connected with the driven plate assembly 4 and the pressure plate 3 .

The driven plate assembly 4 transmits the power of the engine through friction, alleviates impact, avoids resonance, and is mechanically connected with the pressure plate 3 and the generator 5 . Described driven disc assembly 4 is equivalently adopted traditional automobile dry clutch driven disc assembly, and all parts are existing mature parts, and production technology, equipment, mold etc. are all existing mature, therefore, can be extremely Greatly shorten the development cycle of the auxiliary power unit and reduce the development cost.

The driven disk assembly 4 is the same as the traditional automobile dry clutch driven disk assembly, which contains a torsional vibration damping component, which has the function of torsional vibration damping, reduces the vibration in the power transmission process, and can avoid the transmission of the auxiliary power unit. The resonance of the system alleviates the impact, reduces the noise, and improves the life of the auxiliary power unit.

The pressure plate 3 compresses the driven plate assembly 4 on the engine flywheel 2 of the engine 1, so that a positive pressure acts on the friction plate of the driven plate assembly 2, therefore, the function of the pressure plate 3 and The structures are relatively simple and can be obtained by various mechanical processing methods.

The generator 5 is mechanically connected with the driven disk assembly 4, and converts the mechanical energy of the engine 1 transmitted by the driven disk assembly 4 into electrical energy for output.

The invention provides an auxiliary power unit for an electric vehicle. The engine 1 is a traditional internal combustion engine, which converts the chemical energy of the fuel into mechanical energy output. Since the pressure plate 3 compresses the driven disk assembly 4 on the engine flywheel 2 of the engine 1, And there is a relatively large friction coefficient between the driven plate assembly 4 and the engine flywheel 1 and the pressure plate 3 of the engine 1, so that the mechanical energy output by the engine 1 is transmitted to the driven plate assembly 4, and then through the driven plate assembly After the vibration is reduced by 4, it is transmitted to the generator 5, and the mechanical energy output by the engine 1 is converted into electrical energy output through the generator 5, and the electrical energy can be used to drive the electric vehicle.

The invention provides an auxiliary power device for electric vehicles, which can be used in extended-range electric vehicles. It only needs to connect the output line of the generator to the motor controller through cables, and there is no mechanical connection with the wheels. According to the arrangement of components, the installation arrangement is carried out, so the installation arrangement is flexible.

Claims (5)

1. a used for electric vehicle auxiliary power unit is characterized in that: comprise driving engine, clutch drived disk assy, platen and electrical generator; Platen is pressed on clutch drived disk assy on the flywheel of driving engine, and electrical generator and clutch drived disk assy mechanical connection can convert the Engine Mechanical of clutch drived disk assy transmission into electric energy output.

2. a kind of used for electric vehicle auxiliary power unit according to claim 1 is characterized in that: described driving engine is a combustion engine.

3. a kind of used for electric vehicle auxiliary power unit according to claim 1 is characterized in that: described driving engine is spark ignition engine, diesel engine or other engine fuels.

4. a kind of used for electric vehicle auxiliary power unit according to claim 1 is characterized in that: described clutch drived disk assy adopting by equivalent dry type clutch clutch drived disk assy.

5. a kind of used for electric vehicle auxiliary power unit according to claim 1, it is characterized in that: described clutch drived disk assy contains the torsion damping parts, has the effect of torsion damping.

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