Air inlet valve capable of producing inlet air swirls and provided with spiral groove, and internal combustion engine

Abstract

The invention discloses an air inlet valve capable of producing inlet air swirls and provided with a spiral groove, and an internal combustion engine, and belongs to the field of valve timing mechanisms and air inlet systems of internal combustion engines. The air inlet valve comprises a valve rod and a valve collar. A plurality of arc-shaped flow guide plates capable of enabling inlet air flow to form swirls are arranged on the back surface of the valve collar, and the bending directions of the flow guide plates are the same. According to the air inlet valve capable of producing the inlet air swirls and provided with the spiral groove, the spiral groove is formed between the flow guide plates and the valve collar, strong inlet air swirls can be produced when the air inlet valve is in a small lift mode, and the air inlet resistance is small when the air inlet valve is in a large lift mode, and the air inlet valve is particularly suitable for improving the fuel evaporation, blending and combustion performance of a gasoline engine with a low-medium load.

Description

technical field [0001] The invention relates to the field of an air distribution mechanism and an intake system of an internal combustion engine, in particular to an intake valve with a spiral groove for generating an intake vortex and an internal combustion engine. Background technique [0002] The internal combustion engine improves its economy, power and emission performance by organizing the intake swirl. There are usually three ways to generate intake vortex: tangential air passage, spiral air passage and intake valve with air guide screen. The shape of the tangential air channel is simple, but the intake resistance is large and the vortex is relatively small; the vortex intensity of the spiral air channel is relatively high, but the shape of the intake channel is complex; the tangential air channel and the spiral air channel generate air intake through the shape of the air channel. vortex. When the intake valve lift is small, the vortex generated by the tangential ai...

AI Technical Summary

Problems solved by technology

However, the intake valve with air guide screen has the following disadvantages: (1) the air intake resistance is very large; (2) in order to ensure the strength of the eddy current, a valve anti-rotation mechanism needs to be installed; (3) the air guide screen is added to make the valve disc rigidity Uniform, large deformation, easy to partial wear of the valve, unfavorable for sealing

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