Method for restraining supercharge gasoline engine super detonation through double-fuel injection

Abstract

The invention relates to the technical field of internal combustion engines, in particular to a method for restraining the supercharge gasoline engine super detonation through double-fuel injection. According to the method for restraining the supercharge gasoline engine super detonation through double-fuel injection, gasoline is injected in an intake channel of an engine, alcohol fuel is injected in a combustion chamber one or more times, the alcohol fuel with high latent heat of vaporization is injected in intake stroke and can lower the intake temperature, the charging quantity coefficient is increased, and the dynamic property is improved; due to the compression stroke injection, the temperature of mixed gas at a compression terminal can be reduced, and premature combustion is effectively restrained; injection is conducted in the combustion process, fuel layered mixed gas can be formed, and the spreading route of detonation waves is cut off; the super detonation of a supercharge small-displacement gasoline engine can be effectively restrained through one or more times of injection, and an important support is provided for energy conservation and emission reduction of the engine. Meanwhile, only a set of intake channel injection nozzle needs to be additionally added to an existing supercharge gasoline engine, cost is low, upgrading of an existing engine product technology is forcefully supported, and the industrial prospect is good.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to a method for suppressing super knocking of a supercharged gasoline engine by dual fuel injection. Background technique [0002] The automobile industry is an important part of my country's economic structure, and most passenger cars use gasoline engines as their power source. Compared with traditional engines, direct-injection supercharged downsizing engines have great potential for energy saving and emission reduction. In the past ten years, they have made great progress and are becoming the main energy-saving way for engines. However, with the supercharging and small displacement technology, the engine is prone to an abnormal combustion phenomenon that is extremely harmful to the engine and has not been fully understood so far—super knocking. Volkswagen calls it Unwanted pre-ignition [1] , called Mega Knock by AVL [2] , which IFP researchers call pre-igni...

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Problems solved by technology

[0011] The purpose of the present invention is to provide a method for suppressing super-knock of a super-knock of a super-knock of a super-knock of a super-knock of a super-knock of a super-knock of a super-knock of a super-knock of a super-knock of a super-knock in order to overcome the super-knock of a super-knock of a super-knock of a super-knock of a super-knock that the super-knock takes place in order to overcome

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