Control method for power system of dimethyl ether/hydrogen internal combustion engine

Abstract

The invention provides a power system of a dimethyl ether / hydrogen internal combustion engine and a control method for the power system of the dimethyl ether / hydrogen internal combustion engine, belonging to the fields of energy saving and the use of alternative fuels of the internal combustion engine. The power system comprises a dimethyl ether gas supply device and a hydrogen gas supply device, wherein dimethyl ether is reformed to produce hydrogen by the waste heat of the tail gas. The power system also comprises a dimethyl ether tank and a hydrogen tank, a tail gas waste heat reforming device, a blended fuel control unit and a dimethyl ether reformer controller, and input signals such as a crank angle signal, a cooling water temperature signal, a gas inlet temperature and pressure signal, and output signals such as a dimethyl ether jetting signal and a hydrogen jetting signal, an igniting module signal, an idle speed motor control signal, and a tail gas waste heat reforming device control signal. According to the invention, the discharging performance and the combustion performance of a spark ignition engine can be improved and increased due to dimethyl ether and hydrogen, and hydrogen is produced by reforming dimethyl ether, so that the use cost can be reduced, and the compensation of hydrogen can be realized. The device is simple in design structure, easy to install, and lower in cost, and the system is further good in adaptability and expansibility, wide in market prospect, and better in economic benefit.

Description

technical field [0001] The invention provides a control method of a dimethyl ether / hydrogen internal combustion engine power system, specifically relates to a fuel supply, reforming utilization, combustion control and operation mode of an internal combustion engine, and belongs to the field of internal combustion engine energy saving and utilization of alternative fuels. Background technique [0002] Due to problems such as environmental pollution and energy shortage, improving the emission and performance of vehicle engines has become the concern and research focus of related industries. There are many objective problems in the operation of traditional ignition gasoline engines, and many new technologies adopted in order to reduce emissions and improve performance have caused new problems such as increased costs and manufacturing difficulties. Using gaseous fuel as fuel for internal combustion engines can not only solve the problem of energy shortage, but also reduce the pr...

AI Technical Summary

Problems solved by technology

First of all, for traditional spark-ignited gasoline engines, due to the insufficient evaporation of fuel and the formation of oil film after the oil-air mixture enters the combustion chamber, insufficient combustion and high emissions are caused; secondly, when the engine is in cold start and idling conditions, due to low speed , poor intake fluidity and other reasons also cause problems such as uneven mixing of oil and gas, a large amount of residual exhaust gas in the combustion chamber, and insufficient combustion of the mixture; finally, traditional engines will increase the amount of fuel injection to improve the smooth start of the engine, which will lead to high emissions. and high fuel consumption

However, simply using new energy such as hydrogen as the main energy source of the engine will cause the performance of the engine to fail to meet the requirements due to the physical and chemical characteristics of the fuel itself or require a large degree of adjustment to the engine.

In addition, new energy sources such as hydrogen have also caused a substantial increase in costs due to their complex preparation, storage and transportation processes.

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