Compression ignition type methanol engine fuel supply system and control method thereof

Abstract

The invention relates to a compression ignition type methanol engine fuel supply system and a control method thereof, and mainly relates to the field of methanol engine supply systems. The methanol engine fuel supply system is mainly characterized in that the problem of air resistance in the methanol engine fuel supply system, especially the problem of air resistance at an oil control valve of an engine high-pressure oil pump, is effectively solved through circular flowing of methanol fuel and the cooling effect of a fuel cooler on the methanol fuel, and the oil supply pressure and the fuel temperature of the system can be adjusted in the fuel circulation. According to the methanol engine fuel supply system, an electric fuel delivery pump, a fuel cooler, a throttling valve and the like are additionally arranged in the engine fuel supply system, circulating flow of methanol fuel in the methanol engine fuel supply system is achieved, and the working states of the throttling valve and a cooling fan are controlled through an ECU, so that accumulation and evaporation of methanol fuel in a fuel supply pipeline are effectively reduced, and normal fuel supply of a methanol engine is guaranteed.

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 increasing shortage of oil resources, the traditional engines using fossil fuels have also experienced an energy crisis, and the continuous expansion of environmental problems in recent years has put forward higher requirements for the performance of the engine's emissions and other aspects, making the traditional Engine technology transformation is imminent. Traditional engine innovation and transformation is to innovate engine technology, improve engine thermal efficiency and emission performance, etc. On the other hand, it is to seek cleaner engine fuels to replace fossil fuels. Any aspect needs to be improved in engine technology. Only by making breakthroughs and innovations can we solve the severe test we are currently facing. [000...

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

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