Gasoline Engine Composite Spherical Combustion Chamber Cylinder Head and Its Gasoline Engine

Abstract

The invention discloses a composite spherical combustion chamber cylinder head for a gasoline engine and the gasoline engine. The composite spherical combustion chamber cylinder head comprises a cylinder head body and an air inlet channel, an exhaust channel and a spark plug installation hole which are formed on the cylinder head body, wherein a radiating fin is arranged on the outer surface of the cylinder head body; a combustion chamber surface is formed on the inner side of the cylinder head body and has a composite spherical surface structure; a spherical surface I, a smooth curved surface and a spherical surface II are formed on the cylinder head body from bottom to top in turn, and the radius of the spherical surface II is greater than that of the spherical surface I; and smooth transition is formed between the spherical surface I and the spherical surface II by the smooth curved surface. In the composite spherical combustion chamber cylinder head, combustion gas is easy to mix, and entered gas flow can be subjected to resistance in different directions, so that fuel oil mixed gas can form better turbulent flow, the combustion is fuller, and the power of the gasoline engine is improved effectively; and taking the gasoline engine of which the maximum power (the revolving speed is 3,060 revolutions per minute rpm) is 7.5 kW as an example, the power can be improved to 8.1 kW, and the emission is reduced from 8.0 to 6.0 g / kW.h, so the gasoline engine meets and exceeds the standard of 8g / kW.h at the environmental protection agency 3 (EPA) stage.

Description

technical field [0001] The invention relates to a power machine component and its application, in particular to a gasoline engine component and its application. Background technique [0002] A gasoline engine is a power machine that uses gasoline as fuel. It is composed of cylinder, crank linkage mechanism, gas distribution system, oil supply system, lubrication system and ignition system; the cylinder head is provided with intake passage and exhaust passage, and forms the combustion chamber surface together with the cylinder, so it belongs to gasoline engine more important parts. Gasoline is burned as a mixture of fuel and air in the combustion chamber to generate a large amount of heat, which is used as driving energy. The parameters of the combustion chamber are the necessary conditions to ensure the efficient operation of the gasoline engine. [0003] In the prior art, the combustion chamber surface of the cylinder head generally adopts a wedge-shaped structure, which...

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Problems solved by technology

[0003] In the prior art, the combustion chamber surface of the cylinder head generally adopts a wedge-shaped structure, which has a relatively large surface volume ratio, but this structure is beneficial to the installation of other auxiliary structures, such as valve components; if the structure of the combustion chamber surface is changed, it will affect the intake, Arrangement of exhaust valve assembly

The existing intake and exhaust valve assembly structures cannot be applied to the installation of combustion chambers with different structures, otherwise there will be problems of loose closing, inaccurate and unsmooth movement, which will affect the normal operation of the gasoline engine

In order to solve the above problems, a spherical combustion chamber structure has appeared, which has a smaller surface-to-volume ratio and has a better impact on the performance of gasoline engines; however, due to the smooth surface of the spherical combustion chamber, it is not conducive to the mixing of combustion gases, and in order to adapt to The installation of the valve will cause a sudden change in shape on the surface of the combustion chamber, which will affect the mixing, intake and exhaust, so that the advantages of the spherical combustion chamber will not be fully utilized

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