Multi-hole oil spraying nozzle dual-spraying ethanol-added gasoline lean-burn engine

Abstract

The invention provides a multi-hole oil spraying nozzle dual-spraying ethanol-added gasoline lean-burn engine. The multi-hole oil spraying nozzle dual-spraying ethanol-added gasoline lean-burn engineis characterized in that the working procedure comprises the steps that crankshaft position data, camshaft position data, an inlet air flow and cooling water temperature of the engine are acquired; the rotation speed of the engine is calculated according to the crankshaft position data and the camshaft position data; a prestored data base is inquired according to the rotation speed of the engine,the inlet air flow and the cooling water temperature, so that an ideal combustion parameter of a current working condition is obtained; the ideal combustion parameter is converted into an engine control variable; a current actual combustion parameter is calculated according to a cylinder pressure signal of an engine air cylinder; and the engine control variable is corrected according to the actualcombustion parameter and the ideal combustion parameter. By optimizing the spraying time, the spraying pulse width and the ratio of inlet air path spraying and direct-spraying system, feedback control on the combustion phase positions and the combustion rate is realized, so that the separation-layer lean combustion has the same ultra-low emission as homogeneity charge ignition combustion, and theengine has full-load range working capability.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a lean-burn engine with dual-injection ethanol gasoline of multi-hole fuel injectors. Background technique [0002] With the gradual implementation of the National VI emission regulations, the depletion of petroleum resources and the impact of new energy vehicles, major automobile companies and research institutions are looking for effective ways to reduce engine emissions while maintaining the original power. The combustion mode of the traditional gasoline engine is premixed combustion: that is, the fuel and the air are fully mixed before the ignition is started, and the amount of air entering the cylinder is controlled by the throttle opening and the engine speed. The flow rate injects fuel near the stoichiometric air-fuel ratio. Due to the explosive characteristics of gasoline, the compression ratio of traditional gasoline engines is much lower than that of diesel engines, ge...

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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 The problem related to lean burn is mentioned, so the combustion mode of gasoline engine cannot be fundamentally changed, and the patent still uses gasoline as fuel, which cannot directly solve the problem of energy depletion

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