Spark plug trigger type homogeneous compression ignition engine

Abstract

The invention provides a spark plug trigger type homogeneous compression ignition engine. The spark plug trigger type homogeneous compression ignition engine is characterized in that: as the compression ratio of an engine is very low and the gas mixture in a cylinder cannot be burned by means of compression of a piston, the special points of the park plug trigger type homogeneous compression ignition engine are that a combustion chamber and a supercharging airway are added in a cylinder cover of the engine; the combustion chamber is equipped with an auxiliary oil nozzle and a spark plug; and in the middle and later periods of a compression stroke, as the main and auxiliary oil nozzles successively spray oil to the cylinder and the combustion chamber, and then the spark plug is ignited, the combustion volume of the fuel oil in the combustion chamber is rapidly expanded so as to compress the gas in the supercharging airway into the cylinder to enable the pressure and temperature in the cylinder to rise rapidly so as to trigger the homogeneous gas mixture in the cylinder to be compressed and burst into flames. The spark plug trigger type homogeneous compression ignition engine has the advantages that the engine is easy to control; the spark plug is used to indirectly trigger the homogeneous gas mixture in the cylinder to be compressed and then burst into flames, instead of directly igniting the gas mixture in the cylinder, so that the igniting time of the engine can be accurately controlled.

Description

technical field [0001] The invention is a spark plug triggered homogeneous compression ignition engine, which is characterized in that the compression ratio of the engine itself is very low, and the mixture in the cylinder cannot be combusted by the compression of the piston. Combustion chamber and pressurized air passage, the combustion chamber is equipped with sub-injectors and spark plugs. In the middle and late stages of the compression stroke, the main and sub-injectors spray fuel to the cylinder and the combustion chamber successively. The spark plug ignites, and the fuel combustion volume in the combustion chamber is rapid. Expansion, presses the gas in the pressurized air passage into the cylinder, so that the pressure and temperature in the cylinder rise sharply, triggering the compression and ignition of the homogeneous mixture in the cylinder. The advantage is that the engine control is simple. The spark plug indirectly triggers the compression and combustion of the...

AI Technical Summary

Problems solved by technology

[0002] At present, automobile emission regulations are becoming more and more stringent. Europe has begun to implement the Euro VI standard, and China is about to implement the National VI standard. In order to meet the stringent emission regulations, there are two solutions. The first solution is to increase exhaust after-treatment. Add a three-way catalytic converter and a particulate filter to the exhaust pipe, and the exhaust emission can meet the Euro VI standard, but the engine manufacturing cost and fuel consumption will increase a lot. The second solution is to optimize the engine technology to reduce the emission of harmful substances, starting from the source of the emission To solve the emission problem, major OEMs are currently investing heavily in research and development of new environmentally friendly engines. Homogeneous compression ignition engines (HCCI engines) can greatly reduce NOx and PM, but problems such as prone to knocking and low engine load have not been able to Solution, immature technology has prevented HCCI engines from being mass-produced. If HCCI engines can solve the problems of knocking and low load, it will completely solve the problem of engine emission pollution from the source, and only need simple exhaust after-treatment to meet Euro VI requirements. Emission Standards

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