Internal combustion engine

Abstract

The invention relates to an internal combustion engine. Each air cylinder of the internal combustion engine comprises two air inlet passages, an air discharge passage, an oil sprayer and a spark plug, wherein the two air inlet passages are communicated with a combustion chamber of the air cylinder, the air discharge passage is communicated with the combustion chamber of the air cylinder, the oil sprayer sprays oil to the air inlet passages to be mixed with the air for forming combustible mixed gas, and the spark plug is used for ignition. The fuel oil concentration of the combustible mixed gas in the air inlet passage near the spark plug side during the oil spraying is higher than the fuel oil concentration of the combustible mixed gas in the other air inlet passage. The internal combustion engine has the advantages that the concentration of the combustible mixed gas at the side near the spark plug is high, so the stable combustible mixed gas delamination is formed in the combustion chamber of the air cylinder.

Description

Technical field [0001] The invention relates to an internal combustion engine, in particular to an internal combustion engine with a stratified combustible mixture. Background technique [0002] At present, the well-known port-injected gasoline internal combustion engine is mainly homogeneous combustion, that is, the concentration of the mixture entering the cylinder is uniform, and the port design is symmetrical port design, that is, the shape of the two intake ports is the same; and the injector adopts Symmetrical arrangement, the axis of the injector coincides with the symmetry planes of the two intake ports. This traditional design scheme is to produce a consistent intake volume and a uniform mixture in the two intake ducts. [0003] The spark plugs on the three-valve cylinder head are usually arranged asymmetrically (outside the cylinder axis), while the injectors are arranged symmetrically. The airflow entering the cylinder through the two intake ports is not completely con...

AI Technical Summary

Problems solved by technology

Due to the manufacturing error of the intake port, the airflow entering the cylinder through the two intake ports is not exactly the same, and because the axis position of the injector will not completely coincide with the symmetrical plane of the air port, the fuel injected by the injector will also be in the same position. The distribution of the two intake ports will not be completely equal. These two errors cause a large difference in the concentration of the mixture entering the cylinder through the two intake ports.

When such manufacturing differences cause the mixture gas in the area near the spark plug of the three-valve internal combustion engine to be relatively thin, it is easy to cause problems such as difficulty in starting the internal combustion engine, unstable combustion, poor emissions, and high fuel consumption.

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