Control method and device for dual-fuel engine and vehicle with same

Abstract

The invention provides a method and device for controlling a dual-fuel engine and an automobile with the device. The method comprises the steps that before injection of a gasoline gas inlet channel, the rotating speed and torque needed for the engine are acquired, and the proportionality coefficient of gasoline entering a gas cylinder is determined according to the rotating speed and the torque; the gas inlet amount in the gas inlet channel is acquired, and the precipitation proportionality coefficient of the gasoline precipitated in the gas inlet channel is determined according to the gas inlet amount and the rotating speed; the evaporation coefficient of the gasoline precipitated in the gas inlet channel is determined according to the gas inlet amount and the rotating speed; and the basic gasoline injection amount is determined according to the rotating speed and the torque, and the basic gasoline injection amount is corrected according to the proportionality coefficient, the precipitation proportionality coefficient and the evaporation coefficient of the gasoline entering the gas cylinder is corrected so as to determine the actual gasoline injection amount. According to the method for controlling the dual-fuel engine, the problem that the engine is short of power in the automobile acceleration process due to poor following performance of gasoline is solved, the injection atomization efficiency of the gasoline gas inlet channel of the engine is improved, and meanwhile gasoline consumption and the waste gas discharge amount of the engine are reduced.

Description

technical field [0001] The invention relates to the technical field of automobile manufacturing, in particular to a dual-fuel engine control method and device and an automobile with the device. Background technique [0002] Traditional engines are mainly divided into gasoline engines and diesel engines. The advantage of gasoline engines is that the emissions of NOx (nitrogen oxides, mainly including nitrogen monoxide NO and nitrogen dioxide NO2) and Soot (soluble organic matter) are low, but the ignition method Determines the poor fuel economy of gasoline engines. Diesel engines use compression combustion to ensure good fuel economy, but the corresponding NOX and Soot emissions are relatively high. [0003] At present, dual-fuel engines usually use gasoline to be injected from the intake port, and diesel is injected in the cylinder to ignite the gasoline injected into the intake port. This injection method has a great impact on the fuel consumption of the dual-fuel engine a...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention aims to propose a dual-fuel engine control method to solve the technical problem of insufficient power caused by poor gasoline followability of the dual-fuel engine during vehicle acceleration

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