A fuel supply system and control method for a compression ignition methanol engine

Abstract

The invention relates to a compression ignition methanol engine fuel supply system and its control method, mainly related to the field of methanol engine supply system, and its main feature is that the system effectively eliminates the cooling effect of the methanol fuel by the circulating flow of the methanol fuel and the fuel cooler The air resistance problem in the methanol engine fuel supply system, especially the air resistance problem at the oil control valve of the high-pressure oil pump of the engine, and the oil supply pressure and fuel temperature of the system can be adjusted in the fuel cycle. The present invention realizes the circulation flow of methanol fuel in the methanol engine fuel supply system by adding an electric oil delivery pump, a fuel cooler, and a throttle valve to the engine fuel supply system, and controls the throttle valve and the cooling fan through the electronic control unit ECU The control of the working state effectively reduces the accumulation and evaporation of methanol fuel in the fuel supply pipeline and ensures the normal fuel supply of the methanol engine.

Description

technical field [0001] The invention mainly relates to the field of engine supply systems, in particular to a compression ignition type methanol engine fuel supply system and a control method thereof. Background technique [0002] With the increasingly prominent problem of lack of oil resources, the traditional engine using fossil fuels also has an energy crisis, and the continuous expansion of environmental problems in recent years has put forward higher requirements for the performance of the engine in various aspects such as emissions, making the traditional engine The transformation of engine technology is imminent. On the one hand, the innovation and transformation of traditional engines is to innovate engine technology, improve engine thermal efficiency and emission performance, etc., on the other hand, to seek cleaner engine fuels to replace fossil fuels. Only by making breakthroughs and innovations can we solve the severe challenges we are currently facing. [0003]...

AI Technical Summary

Problems solved by technology

[0003] In the past few years, with the continuous development and innovation of engine technology, alternative fuels for automobiles have become abundant. Through testing a variety of alternative fuels can be used in automobile engines such as reformulated gasoline, ethanol, biodiesel, natural gas methanol, hydrogen Among them, methanol is a recognized clean energy, which has excellent characteristics such as fast combustion rate, good anti-knock performance, low pollution and no smoke exhaust. In automobiles, and research in this field has also made great progress, methanol vehicles have also achieved road running, but after all, they are modified on traditional engines, and there are still many problems, such as the low boiling points of methanol and dimethyl ether, It is easy to evaporate and form air resistance in the oil pipe or air intake, hindering the supply of fuel, etc.

[0004] In order to promote the application of clean fuels in engines, it is urgent to improve the adaptability of engines, such as the proposal of dual-fuel engines, but the fuel mixing method has limited room for improving engine performance, and alcohol fuels are not compatible with diesel oil. The innovative transformation of its fuel supply system enables it to realize the conversion of clean alternative fuels, thereby alleviating the energy crisis and environmental problems, and expanding the application range for other fuels

Images