Double injection gasoline lean burning engine with porous oil nozzle

Abstract

The invention provides a double injection gasoline lean burning engine with a porous oil nozzle. According to the double injection gasoline lean burning engine, the crankshaft position data, cam shaftposition data, air intake flow and cooling water temperature of the engine are collected; the rotating speed of the engine is calculated according to the crankshaft position data and the cam shaft position data; a prestored data sheet is inquired according to the rotating speed of the engine, the air intake flow and the cooling water temperature, and ideal burning parameters of the current work condition are obtained; the ideal burning parameters are converted into the engine control quantity; current actual burning parameters are calculated according to a cylinder pressure signal of an engine air cylinder; and the engine control quantity is corrected according to the actual burning parameters and the ideal burning parameters. By optimizing the injection moment of air inlet channel injection and a direct injection system, the injection pulse width and the proportion, feedback control over the burning phase and the burning rate is achieved, and therefore layered lean burning achieves ultralow emissions proportionable with homogeneous charge ignition burning, and the engine has the full load range work capacity.

Description

Technical field [0001] The present invention relates to the technical field of engines, in particular to a dual-injection gasoline lean-burn engine with a porous injector. Background technique [0002] With the gradual implementation of National VI emission regulations, the increasing depletion of petroleum resources and the impact of new energy vehicles, major auto companies and research institutions are looking for effective ways to reduce engine emissions while maintaining their original power. The combustion mode of traditional gasoline engines is premixed combustion: that is, the fuel and air are fully mixed before ignition starts, the amount of air entering the cylinder is controlled by the opening of the throttle valve and the engine speed, and the intake port nozzle or the in-cylinder nozzle passes the calculated air Fuel with a flow rate around the theoretical air-fuel ratio. Based on the explosive characteristics of gasoline, the compression ratio of traditional gasoli...

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Problems solved by technology

[0003] After searching the existing technical literature, it is found that among the patented technologies of dual-injection engines, Chinese patent application number CN200680008764.9, patent name: dual-injector fuel injection engine, provides a dual-injection engine model, and proposes The idea of ​​injecting fuel into the intake port and the cylinder separately, but the model is based on the v-type machine, and the parameters such as the position and angle of the injector are difficult to directly transfer to the in-line machine. At the same time, the patented technology does not Mention the problems related to lean burn, so it is impossible to fundamentally change the combustion mode of gasoline engines

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