Dimethyl ether fuel hypermulti orifice forced injection system

Abstract

The present invention relates to a dimethylether fuel ultramultinozzle intensified spray system. The DME storage tank is connected with low-pressure fuel conveying pump via liquid outlet value, the outlet of the low-pressure fuel conveying pump is connected with intensified fuel-spraying pump through one end of T-junctor via fuel filter, an other end of T-junctor is connected with pressure-storing device on which the pressure gauge is mounted, the outlet of intensified fuel-spraying pump is connected with ultramultinozzle fuel-spraying device through high-pressure fuel pipe. Besides, said system also contains other several components of locking cap, needle valve, regulating nut, pressure-regulating spring, non-return valve and pressure control valve, etc. Said system can make engine obtain high efficiency and ultralow discharge.

Description

technical field [0001] The invention relates to a dimethyl ether fuel injection system, in particular to a dimethyl ether fuel super multi-hole enhanced injection system, which belongs to the field of internal combustion engines. Background technique [0002] In the existing technology, it is found through literature search that the research report SAE Paper972973 "Engine Performance and Exhaust Characteristics of Direct-injection Diesel Engine Operated with DME" by S.Kajitani et al. and emission characteristics, American Society of Automotive Engineers paper, number SAE Paper972973)", this paper introduces a direct injection diesel engine, the direct injection diesel engine adopts a conventional fuel injection system, the system consists of a nitrogen pressurized fuel tank, Bosch type injection Composed of oil pump, 4-hole injector, etc. Because dimethyl ether has a low boiling point and is easy to vaporize, it will cause air resistance in the fuel injection system and mak...

AI Technical Summary

Problems solved by technology

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. In order to make the dimethyl ether fuel in the fuel injection system liquid, a high-pressure nitrogen cylinder is used to pressurize the dimethyl ether in the low-pressure pipeline. , this method can only be used in the laboratory and is not suitable for application to actual motor vehicles

In addition, the calorific value of dimethyl ether fuel is low. To make the engine produce the same power, the injection quantity of dimethyl ether fuel will be 1.9 times that of diesel. This paper uses a conventional fuel injection pump, and the fuel injection rate is not high. A 4-hole fuel injector is used. , it is difficult for the fuel to form a highly diffused spray that is evenly distributed to the combustion chamber, and a uniform gas mixture cannot be formed. In addition, the flow section of the nozzle hole is not large, which increases the combustion duration of the engine. The combustion process of dimethyl ether belongs to the typical partial premixing and partial diffusion combustion way, resulting in nitrogen oxides (NO x ) higher

Images