Method for controlling rotary speed of cooling fan of vehicle and hybrid car

Abstract

The invention relates to the technical field of vehicles and discloses a method for controlling rotary speed of a cooling fan of a vehicle. The method comprises the following steps: detecting the working state of an air conditioning system in real time; determining the rotary speed V1 of the cooling fan needed by the air conditioning system; detecting the temperature of a heat management subsystem of each vehicle; calculating the rotary speed V2 of the cooling fan corresponding to the temperature of the heat management subsystem of each vehicle when the air conditioning system is under the working state; and comparing the rotary speeds V1 and V2 of the cooling fan, and adopting the maximum value of the two values as the rotary speed V, and controlling the cooling fan of the vehicle to work at the rotary speed V. With the adoption of the method for controlling rotary speed of the cooling fan of the vehicle, the heat for each heat dispassion system of the vehicle can be fully emitted, the temperature of some heat dispassion system can be prevented from being too low, the rotary speed of the cooling fan of the vehicle can be can adjusted according to the needs of the heat dispassion system of the vehicle, and the condition that each heat dispassion system is under the best working state is ensured. The invention further provides a hybrid car.

Description

technical field [0001] The present invention relates to the technical field of vehicles, and in particular, to a method for controlling the rotational speed of a cooling fan of a vehicle. The present invention also relates to a hybrid vehicle cooled by the above-mentioned vehicle cooling fan rotational speed control method. Background technique [0002] Vehicles, especially hybrid vehicles, will generate a lot of heat during operation. For example, the air conditioning system will generate a certain amount of heat during operation, and the engine cooling system, electric drive unit, power electronic mold case / electronic drive unit, battery, etc. The management subsystem generates a lot of heat during the working process. In order to ensure the normal operation of the above systems, a vehicle cooling fan is usually used to cool and dissipate the above systems. [0003] The cooling temperature produced by the vehicle cooling fan depends on the rotational speed of the vehicle ...

AI Technical Summary

Problems solved by technology

In the prior art, the cooling fan of the vehicle is always at the same speed state, and at the initial stage of vehicle operation, the heat dissipation of each heat dissipation system is small, and after the vehicle has been running for a long time, the heat dissipation of each heat dissipation system is relatively large, resulting in the temperature of the vehicle's outlet air being high during operation. Too low, the temperature is too high after long-term operation, and the temperature of the cooling parts is too low or too high, which is not conducive to the normal operation of the vehicle

[0004] Especially for hybrid vehicles, in the pure electric drive mode, the coolant in the engine circulation system is cooled too much. When the user wants to change from the pure electric drive mode to the engine drive mode, it takes a long time and consumes a lot of power

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