Cylinder head of small general gasoline engine and its gasoline engine

Abstract

A small general gasoline engine cylinder head comprises a cylinder head main body (1), and an intake passage (9), an exhaust passage (5) and a spark plug mounting hole (8) that are disposed at the cylinder head main body (1). A combustion chamber surface (7) is formed on an inner side of the cylinder head main body (1). The combustion chamber surface (7) is an arch-shaped smooth curved surface. The cylinder head main body (1) is provided with an intake valve (11) corresponding to the intake passage (9), and an exhaust valve (4) corresponding to the exhaust passage (5). The intake valve (11) is inclined from bottom to top towards the intake passage (9). The exhaust valve (4) is inclined from bottom to top towards the exhaust passage (5). The included angle between the axis of the intake valve (11) and the axis of the exhaust valve (4) is 24±5°. Also disclosed is a gasoline engine having the cylinder head. Parameters of the combustion chamber, parameters of the intake valve, and parameters of the exhaust valve fit each other, thereby improving the operational efficiency of the gasoline engine, conserving the fuel, and reducing the emission.

Description

technical field [0001] The invention relates to a general power engine part and its application, in particular to a general gasoline engine part and its application. Background technique [0002] General-purpose gasoline engine refers to a reciprocating piston gasoline engine that has a wide range of applications except for vehicles and aviation. Generally, it is a small general-purpose gasoline engine with a power of less than 20kW. It has strong versatility. cheap price. General-purpose gasoline engines are used as one of the power sources to drive general-purpose machinery, including agricultural and forestry plant protection machinery, garden machinery, generator sets, construction machinery, etc. A general-purpose 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 exha...

AI Technical Summary

Problems solved by technology

For small general-purpose gasoline engines, light and flexible structure, low manufacturing cost and low use cost are the advantages they should have in occupying the market, while the use of external purification methods such as catalytic converters will obviously increase the cost of gasoline engines for small and medium-sized gasoline engines. Losing the competitive advantage in the market, at the same time, it will lead to an increase in volume and weight, and lose the advantages of lightness and flexibility; and, for the external purification method of the catalytic converter, it will not improve the combustion efficiency of the engine itself, which is a passive treatment Exhaust gas does not achieve the purpose of saving or rational use of energy, and it will also cause a relatively large increase in use costs and maintenance costs

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