Sparking plug ignition-type premixing compression ignition system of internal combustion engine

Abstract

The invention discloses a sparking plug ignition-type premixing compression ignition system of an internal combustion engine, and belongs to the technical field of combustion of internal combustion engines. According to the premixing compression ignition system, a high-energy sparking plug is adopted for igniting diesel oil or igniting mixtures of the diesel oil and other fuels, wherein the dieseloil or the mixtures serve as the fuels for premixing and are jetted out in a gas feeding process or a compression process to generate premixing gas in a combustion chamber. By adopting an effective compression ratio under which the premixing gas cannot be ignited, the premixing gas in a cylinder cannot burn spontaneously; by using the high-energy sparking plug for ignition close to a compressionupper limit point, the mixed gas nearby the sparking plug is ignited to make the temperature and the pressure in the cylinder quickly rise, the other remaining premixing gas in the cylinder satisfiesthe conditions for spontaneous combustion, large-scale multi-point spontaneous combustion happens, and fast combustion of the premixing gas is achieved. By adopting a high expansion ratio, the heat efficiency is further improved.

Description

technical field [0001] The invention relates to a spark plug ignition type internal combustion engine premixed compression ignition system, which belongs to the technical field of internal combustion engine combustion. technical background [0002] The traditional diesel engine belongs to the diffusion combustion of heterogeneous mixing, and there are two main contradictions of economy and emission, soot emission and NOx emission; while the traditional gasoline engine has low thermal efficiency. For this reason, since the 1980s, in order to improve combustion and reduce emissions, the concept of premixed compression ignition has entered people's field of vision. However, premixed compression firing phase control has not been resolved. Contents of the invention [0003] In order to effectively control the premixed compression ignition phase of the internal combustion engine, the fuel that is easy to compress and ignite can be used to ignite the fuel that is suitable for ig...

AI Technical Summary

Problems solved by technology

The present invention is based on the idea that when a high-energy spark plug ignites diesel oil, or ignites a mixture of diesel oil and other fuels, the temperature and pressure in the cylinder rise, and the pre-mixed gas compresses and ignites in a large range, it provides a spark plug-ignited pre-mixed compression ignition system for an internal combustion engine, which solves the problem of pre-mixed compression ignition Ignition phase control problem of mixed compression ignition for efficient and clean premixed compression ignition of internal combustion engines

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