Boosting pump for dimethyl ether vehicle

Abstract

The invention relates to a boosting device, particularly discloses a boosting pump for a dimethyl ether vehicle. The boosting pump comprises a pump body, a plunger and an oil chamber are arranged in an inner cavity of the pump body, a motor driving the plunger to move is arranged above the pump body, a dimethyl ether gaseous-phase return pipe, a dimethyl ether outlet and a dimethyl liquid-phase ether inlet are arranged on one sidewall of the pump body from top to bottom, the tail end of the plunger is arranged correspondingly to the dimethyl ether outlet, and engine oil is sealed in the oil chamber. The boosting pump for the dimethyl ether vehicle is simple in structure and low in manufacturing difficulty, so that cost is low and industrialized popularization is facilitated. Meanwhile, via single-plunger mode and engine oil sealing, boosting requirements are met, and the defect that the dimethyl ether is corrosive and hard to seal is overcome.

Description

technical field [0001] The invention relates to a booster device, in particular to a booster pump for dimethyl ether vehicles. Background technique [0002] Dimethyl ether has the characteristics of low boiling point, low volumetric calorific value and low viscosity. Compression ignition combustion under high compression ratio has the same thermal efficiency as diesel engine. At the same time, the molecular formula of dimethyl ether does not contain c-c bond, which can realize smokeless combustion , therefore, dimethyl ether as a fuel for compression ignition engines can achieve clean combustion and is an excellent green energy source. [0003] In the application of dimethyl ether-natural gas hybrid engine, the gasification pressure of solid dimethyl ether will increase with the increase of temperature, so a booster pump should be installed so that the pressure at the inlet of the high-pressure pump will not drop Under the saturated vapor pressure of dimethyl ether, so as t...

AI Technical Summary

Problems solved by technology

The above method has high technical requirements for the booster pump using dimethyl ether booster, so the manufacture of the booster pump is difficult and expensive, which hinders the practical application of this method

Furthermore, due to the characteristics of low viscosity of dimethyl ether, corrosion to rubber, self-pressure, liquid when the pressure is high, gas when the pressure is low, and the saturation pressure of the liquid changes with the change of temperature, even if it meets the requirements of supercharging Requirements, sealing is also a problem, so the general booster pump cannot meet the boosting requirements for it

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