Methanol automobile self-adaptive starting method based on automatic fuel recognition

Abstract

The invention discloses a methanol automobile self-adaptive starting method based on automatic fuel recognition. The method is characterized in that a vehicle methanol fuel type and air inlet pipe temperature are obtained through automatic acquisition, so that the injection quantity of a fuel injector is automatically adjusted. The method comprises the following steps that staring adjustment is conducted, specifically, a single-chip microcomputer judges the methanol fuel type according to a dielectric constant sensor, determines the starting mode of an engine according to the air inlet temperature of the engine and initializes an original oil injection control signal; and self-adaptive adjustment is conducted, specifically, after staring adjustment, the single-chip microcomputer adjusts the original fuel injection control signal in a self-adaptive mode according to the detected methanol fuel type and the frequency of the original fuel injection control signal, and a fuel injector drive circuit adjusts the injection amount of the fuel injector according to the adjusted fuel injection control signal. According to the method, the environment temperature and the methanol fuel type can be automatically recognized, then the fuel injection pulse width needed by engine starting is automatically judged according to the environment temperature and the methanol fuel type, and the rotating speed during engine starting is automatically adjusted to idling rotating speed.

Description

technical field [0001] The invention relates to an adaptive starting method for a methanol automobile based on automatic fuel identification, and belongs to the technical field of automobile fuel injection control. Background technique [0002] At present, some provinces in my country respond to the call of the state to actively develop methanol vehicles, and promote and sell corresponding models of methanol fuel in light of local actual conditions. However, there is currently no fuel injection method on the market that can automatically identify the fuel type and automatically adjust the fuel injection quantity so that the combustion air-fuel ratio remains within a certain range. After the existing fuel injection system is added with different methanol fuels, it often needs to adjust the parameters of the ECU several times, which has obvious geographical limitations and has always restricted the promotion of methanol vehicles. Contents of the invention [0003] The objec...

AI Technical Summary

Problems solved by technology

After the existing fuel injection system is added with different methanol fuels, it often needs to adjust the parameters of the ECU several times, which has obvious geographical limitations and has always restricted the promotion of methanol vehicles.

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