Engine cooling method and engine cooling system device for hybrid electric buses

Abstract

Disclosed are an engine cooling method and an engine cooling system device for hybrid electric buses. According to the method, electronic fans are used to cool an engine; engine outgoing water temperature and engine incoming gas temperature are controlled precisely in real time through the hierarchical logic control of the electronic fans. In the hierarchical logic control of the electronic fans, two electronic fan sets, namely a first electronic fan set and a second electronic fan set, are used; a bus controller outputs a control signal group to control start and stop of the first electronic fan set; the bus controller outputs a second control signal group to control start and stop of the second electronic fan set. The hierarchical control of the electronic fans is characterized in that the first electronic fan set is started in a delayed manner and stopped with priority, and the second electronic fan set is started with priority and stopped in a delayed manner. The engine cooling method and the engine cooling system device for hybrid electric buses have the advantages that radiating performance of the engine can be optimized, the service lives of the electronic fans can be prolonged, the auxiliary heating function is provided for the stage IV postprocessing system and the emission of harmful gases such as nitric oxide from the engine is reduced.

Description

technical field [0001] The invention relates to an engine cooling method and a system device, in particular to an engine cooling method and a system device of a hybrid electric passenger car; it is mainly used for engine cooling of a hybrid electric passenger car. Background technique [0002] Engine cooling system is a very important part of traditional bus and hybrid bus, which directly affects the service performance and life of the engine. [0003] At present, the main technology of the engine cooling system is to use the fan transmission mechanism of the intermediate transition wheel, and use the belt drive to drive the fan to rotate to achieve the purpose of heat dissipation; Precise and effective control will waste 5% to 12% of the power of the engine, and the fan noise is relatively loud. Especially the electronic fan that adopts now is exposed in the engine compartment, under the situation that the ventilation effect of the engine compartment is not good, the high ...

AI Technical Summary

Problems solved by technology

[0011] The problem to be solved by the present invention is: the cooling efficiency of the existing engine technology is not high enough, and the fan cannot be accurately and effectively controlled according to the change of the engine water temperature or air temperature, and if no deicing measures are taken in winter, it will affect the Insufficient comprehensive emission performance of the engine, a hybrid bus engine cooling method and cooling system device with high cooling efficiency and effective prevention of cooling system freezing in winter are proposed

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