Dimethyl ether engine efficient, ultra-low emission combustion system

Abstract

The dimethyl ether engine high-efficiency ultralow-discharge combustion system belongs to the field of internal combustion engine. The invented DME storage tank is connected with low-pressure fuel conveying pump by means of liquid outlet valve, the output of the low-pressure fuel conveying pump is connected with intensified fuel-spraying pump via one end of T-junctor and fuel filter, the outlet of intensified fuel-spraying pump is connected with ultramultinozzle fuel-spraying device via high-pressure fuel pipe, said ultramultinozzle fuel-spraying device is set on the cylinder cover of engine and is matched with combustion chamber, the outlet of waste gas recirculation control valve is connected with inlet of waste gas recirculation cooling device, and its inlet is connected with dischargetube.

Description

technical field [0001] The invention relates to a dimethyl ether engine combustion system, in particular to a dimethyl ether engine high-efficiency and ultra-low emission combustion system, which belongs to the field of internal combustion engines. Background technique [0002] As the vehicle engine with the highest thermal efficiency, the compression ignition engine has been highly valued by people. After several generations of hard work, the traditional combustion system has been developed relatively well. However, in recent years, the shortage of oil resources in the world, the sharp fluctuation of oil prices and the increasingly stringent emission regulations of various countries have brought new challenges to the research on alternative fuels and low-emission combustion of diesel engines. The dimethyl ether fuel that can be produced from coal, natural gas, and biomass is a new alternative fuel for automobiles that has emerged in recent years. Dimethyl ether is gaseous...

AI Technical Summary

Problems solved by technology

Through the retrieval of existing technology, find document: "Engine Performance and Exhaust Characteristics ofDirect-injection Diesel Engine Operated with DME", SAE972973, S.Kajitani, Ibaraki University (engine performance when direct-injection diesel engine burns dimethyl ether and emission characteristics, American Society of Automotive Engineers paper, number: SAE Paper 972973), this paper introduces the combustion system and fuel injection system of the original engine when the direct injection diesel engine uses dimethyl ether as fuel, and the fuel injection system is mainly made by Bosch Type plunger type fuel injection pump and 4-hole fuel injection nozzle; because dimethyl ether has a low boiling point and is easy to vaporize, it will cause air resistance in the fuel injection system and make the engine unable to run normally. pressurization to ensure that the dimethyl ether fuel in the fuel injection system is liquid, this method is not suitable for the application of actual motor vehicles

In addition, the in-cylinder spray combustion method adopted by this technology has nitrogen oxides (NO X ) high emissions, equivalent to the level of the original diesel engine, so it is necessary to take effective measures to further reduce the NOX emissions of dimethyl ether engines, so that the emission performance of dimethyl ether engines can meet the increasingly stringent emission regulations

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