Optimization and Improvement of an Internal Combustion Engine Fuel Injection System Based on Flash Boiling Spray

Abstract

The invention discloses optimization and improvement of a fuel injection system of an internal combustion engine based on flash boiling spray. The key technical point of the optimization and improvement is that the fuel injection system includes an oil nozzle body; a heat exchanger and a switch are arranged on the oil nozzle body; one end of the switch is connected with a power source, and the heat exchanger is connected to the other end of the switch; an earthing end of the heat exchanger is earthed. Through improving fuel temperature in the nozzle, the optimization and improvement of the fuel injection system of the internal combustion engine based on flash boiling spray can increase the bubble concentration of fluid fuel in the nozzle; and thereby, the goal of flash boiling spray is realized.

Description

technical field [0001] The invention relates to an internal combustion engine fuel injection system, in particular to an optimization and improvement of an internal combustion engine fuel injection system based on flash boiling spray. Background technique [0002] In order to improve the efficiency of internal combustion engines, such as improving the geometry of the combustion chamber, optimizing the fuel supply system, and exploring new combustion methods, etc., among them, improving the atomization characteristics can increase the contact area between fuel and air, so as to achieve rapid and uniform mixing of fuel and air in the cylinder The purpose is to be an effective means to achieve high efficiency and low emission of internal combustion engines. [0003] When the fuel pressure drops below the saturation pressure, bubbles will be generated, and when this gas-liquid two-phase fluid is injected from the nozzle into the low-pressure combustion chamber environment, a lar...

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Problems solved by technology

[0003] When the fuel pressure drops below the saturation pressure, bubbles will be generated, and when this gas-liquid two-phase fluid is injected from the nozzle into the low-pressure combustion chamber environment, a large number of bubbles will be generated and grow continuously, leading to burst and produce The flash boiling spray phenomenon, the pressure swirl nozzle that appears now improves the atomization effect to a certain extent, it is based on the theoretical basis of the three-dimensional rotating flow of the two-phase flow field, and the atomization effect is improved, but for the influence Insufficient consideration of external factors of atomization characteristics, such as temperature changes, lead to instability of atomization characteristics, which is not conducive to the mixing of fuel and air, resulting in little improvement in the efficiency of internal combustion engines

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