Power consumption control method for vehicle air conditioning

Abstract

The invention relates to a power consumption control method of a vehicle air conditioning; wherein, the dynamic load change for the running of a vehicle air conditioning system is transferred to an engine management system ECU by a pressure sensor; the engine management system ECU corrects the air inlet amount of the engine and reduces the oil spray amount according to the load change of the air conditioning system, thereby achieving the goal of precisely controlling the output power of the engine and an air-fuel ratio.

Description

technical field [0001] The invention relates to the field of an automobile air-conditioning system in which an engine drives a compressor, in particular to the power consumed by the engine during the operation of the automobile air-conditioning system and a logic control method for the engine ECU. Background technique [0002] At present, the international crude oil price has been rising, and the pressure on the fuel consumption of automobiles is increasing. The economy and environmental protection of automobiles are increasingly the focus of automobile development, and the operation of automobile air conditioners is an important reason for the increase in fuel consumption of automobiles. The current engine The ECU only starts the compressor according to the request signal of the A / C switch of the air conditioner (if other conditions of the engine permit), and at the same time, the engine ECU gives a torque compensation signal to increase the fuel injection quantity, thereby ...

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Problems solved by technology

[0002] At present, the international crude oil price has been rising, and the pressure on the fuel consumption of automobiles is increasing. The economy and environmental protection of automobiles are increasingly the focus of automobile development, and the operation of automobile air conditioners is an important reason for the increase in fuel consumption of automobiles. The current engine The ECU only starts the compressor according to the request signal of the A / C switch of the air conditioner (if other conditions of the engine permit), and at the same time, the engine ECU gives a torque compensation signal to increase the fuel injection quantity, thereby increasing the output power of the engine to drive the compression engine (the fuel injection amount increased by this compensation signal is constant, as long as the compressor is turned on, it will not change with the load of the air conditioner system), especially in the idling condition, because the engine ECU cannot know the current load of the air conditioner system, only A maximum value can be given during system calibration (usually need to increase the speed by 100~150rpm) to avoid flameout

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