Engine cylinder cover and assembling method thereof

Abstract

The invention discloses an engine cylinder cover. The engine cylinder cover comprises a cylinder cover body and a pre-combustion chamber insert arranged on the cylinder cover body; a first pre-combustion chamber cavity is formed in the cylinder cover body; a second pre-combustion chamber cavity and an injection channel communicated with the second pre-combustion chamber cavity and a main combustion chamber of an engine are formed in the pre-combustion chamber insert; the injection channel is located between the second pre-combustion chamber cavity and the main combustion chamber; and the first pre-combustion chamber cavity communicates with the second pre-combustion chamber cavity to form a spherical vortex combustion chamber. According to the engine cylinder cover disclosed by the invention, the scavenging performance of a compression ignition type two-stroke piston engine can be improved so as to reduce the coefficient of residual waste gas in a pre-combustion chamber, fresh air and fuel injected into the pre-combustion chamber can be fully mixed to form fuel gas mixed gas close to the stoichiometric ratio, and the ignition reliability of the pre-combustion chamber is improved; and therefore, the dynamic property and economical efficiency of the engine are improved. The invention further discloses an assembling method of the engine cylinder cover.

Description

technical field [0001] The invention belongs to the technical field of aero-engines, in particular, the invention relates to an engine cylinder head and an assembly method thereof. Background technique [0002] The two-stroke engine is widely used in chain saws and mobile small motors due to its simple structure, fewer parts, less moving parts, less mechanical loss, low manufacturing cost, high power-to-weight ratio, and more work times than four-stroke engines. Generator sets, etc. In order to enhance the competitiveness of products in the market, two-stroke engines are constantly upgrading their technologies in terms of fuel economy, compliance with emission regulations, and convenient performance. Small two-stroke piston engines can be divided into ignition type and compression ignition type according to the ignition method of combustible mixture in the combustion system. For small two-stroke piston engines used in the aviation field, due to the consideration of fuel un...

AI Technical Summary

Problems solved by technology

The cross-sectional size, shape and inclination angle of the inclined channel not only affect the smooth discharge of exhaust gas in the pre-combustion chamber during the scavenging phase, but also affect the engine compression ratio and the landing point of the pre-combustion chamber flame in the main combustion chamber, thereby affecting the engine power and economy. sex

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