Hybrid power vehicle and cooling system and method thereof

Abstract

The invention discloses a cooling system of the hybrid power vehicle. The hybrid power vehicle comprises an engine and a driving motor. The cooling system comprises an engine cooling circuit for cooling the engine and a motor cooling circuit for cooling the driving motor. A heat exchanger is connected between the engine cooling circuit and the motor cooling circuit. The heat generated by the engine is transmitted through the engine cooling circuit to the motor cooling circuit by means of the heat exchanger. The invention further discloses the hybrid power vehicle and a cooling method of the hybrid power vehicle. Compared with the prior art, the heat generated by the engine is transmitted through the engine cooling circuit to the motor cooling circuit, the temperature of the engine system is lowered, a cooler can be shared, the space requirement for a front end module is low, the layout position of the heat exchanger is flexible, and cost is lower compared with a cooler.

Description

technical field [0001] The present invention relates to the field of hybrid vehicles, in particular to a hybrid vehicle and a cooling system and method thereof. Background technique [0002] At present, with the continuous tightening of national fuel consumption and emission regulations, more and more OEMs are devoted to the development of electric vehicles. For electric vehicles, their short cruising range has become one of the shortcomings of electric vehicles. For this reason, small range extenders (small engines) have appeared to extend the cruising range of electric vehicles. The range extender engine has the advantages of small size, compact structure, low power and easy installation. When the battery energy is insufficient, the engine works to generate electricity, thereby extending the cruising range of the car, and has developed into one of the branches of hybrid vehicles. [0003] Although the range extender engine solves the problem of the short cruising range of...

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Problems solved by technology

[0003] Although the range extender engine solves the problem of the short cruising range of electric vehicles, due to the increase of the engine, it is necessary to increase the cooling system to cool it.

For pure electric vehicles, the cooling module itself is more complicated, including the air conditioning system, motor cooling circuit, and battery cooling system, resulting in a large front-end cooling module and crowded space, and there is not enough space for the range extender engine to dissipate heat. If the engine cooling circuit is added, the design will be difficult and the cost will be high

And because the radiator must be arranged in the cooling module at the front end of the engine room, the arrangement space is small, and when the small range extender is arranged in the trunk, the distance from the front-end module is longer, the pipeline connection is longer, and the length of the engine inlet and outlet pipes is increased. Not conducive to layout

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