Method for controlling engine to be automatically stopped or started based on comfort of vehicle-mounted air conditioner

Abstract

The invention provides a method for controlling an engine to be automatically stopped or started. The method comprises the following steps of judging that whether the engine is applicable to be automatically stopped at present or not based on an allowable scope of stop or start; under the circumstance of a judging result 'Applicable', allowing the engine to be automatically stopped, and under the circumstance of a judging result 'Inapplicable', prohibiting the engine from being automatically stopped. According to the method for controlling the engine to be automatically stopped or started disclosed by the invention, the cost is lower; moreover, while the comfort of a vehicle-mounted air conditioner is improved, the chance of exerting the stopping or starting function of the engine is added.

Description

technical field [0001] The present invention relates to a method for controlling the automatic stop and start of an engine, more particularly, to a method for controlling the automatic stop and start of an engine based on the comfort of a vehicle air conditioner. Background technique [0002] At present, with the increasing development and popularization of vehicles, it is becoming more and more important to save fuel consumption through automatic engine stop and start technology. [0003] The existing engine automatic stop and start control method automatically cuts off the fuel supply of the engine when the vehicle stops, stops the engine to save the fuel consumption of the engine at idle speed, and automatically starts the engine when the vehicle is ready to start to provide the power required for driving the vehicle. [0004] However, since the engine is also the cooling source and heating source of the vehicle air conditioner, the automatic stop and start of the engine ...

AI Technical Summary

Problems solved by technology

[0005] However, the above scheme has the following problems: (1) For the first method, because the cost of the electric air conditioner is relatively high, it is not suitable for use on low- and middle-grade vehicles; (2) For the second method, since it is only applicable to the automatic air conditioner with the cabin temperature sensor installed, it is not suitable for the manual air conditioner without the cabin temperature sensor. Applicable, in addition, the difference between the actual temperature in the cabin and the temperature set by the driver is not known to the occupants, which leads to poor comfort experience for the occupants, that is, they feel that the stop-start system works sometimes and sometimes does not; (3) For the third method, since the A / C signal only represents the cooling function of the air conditioner, this solution does not consider the impact of automatic shutdown on the heating of the air conditioner. In addition, under normal circumstances, short-term shutdown will not affect the vehicle. Air-conditioning comfort, and this scheme prohibits such a short-term shutdown, so it reduces the chance of the stop-start function working

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