EGR gas-assisted aviation kerosene injection system

Abstract

The invention relates to an EGR gas-assisted aviation kerosene injection system. The EGR gas-assisted aviation kerosene injection system comprises an EGR system, a gas-assisted oil injector, an oil supply system and an ECU control system, wherein the gas-assisted oil injector comprises an injection nozzle, a gas nozzle, a mixing cavity, an oil injection electromagnetic valve, a gas injection electromagnetic valve and a gas inlet. The EGR gas-assisted aviation kerosene injection system is characterized in that the EGR system is connected to the gas-assisted oil injector through a gas path pipeline; the mixing cavity is communicated with the gas inlet; and compressed EGR gas treated by the EGR system is fed into the mixing cavity through the gas inlet. According to the EGR gas-assisted aviation kerosene injection system, the good aviation kerosene atomization effect is finally achieved, knocking is effectively restrained, and the engine performance is improved.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to an EGR gas (exhaust gas recirculation) auxiliary aviation kerosene injection system. Background technique [0002] Air-assisted injection is used to improve fuel atomization. It was mainly used in two-stroke gasoline engines in the early days. It can reduce the charge loss during the scavenging process of two-stroke gasoline engines, improve its fuel economy and reduce hydrocarbon emissions. Its advantages are reflected in that fuel injection and fuel metering are performed separately to ensure the accuracy and stability of fuel injection quantity under high temperature conditions; the power and fuel economy of the engine are improved through air-assisted injection. The air-assisted in-cylinder direct injection system can achieve small atomization particle size, low penetration, narrow spray cone angle, and good fuel spray quality [0003] The current light-d...

AI Technical Summary

Problems solved by technology

However, due to the poor atomization effect of aviation kerosene, the combustion characteristics have changed greatly compared with gasoline, especially the slow flame propagation speed, which makes it difficult to start the engine cold, and the spark plug is easy to flood the cylinder and deposit carbon.

In addition, due to the low octane number of aviation kerosene and poor antiknock performance, it is very easy to cause knocking in the cylinder, seriously affecting the normal operation and service life of the engine, and restricting the power and economical deterioration of the engine.

[0004] The atomization of aviation kerosene is difficult, and the atomization state of the fuel directly determines the formation process of the mixed gas. In order to solve the atomization problem of aviation kerosene, and there is still a large room for improvement in improving the atomization effect by using conventional air-assisted devices, At the same time, it cannot achieve the effect of suppressing knocking, and a separate strategy is needed to suppress knocking

Images