Engine valve mechanism and engine

Abstract

The invention discloses an engine valve mechanism and an engine. The engine valve mechanism comprises a valve assembly, a rocker arm assembly which is in transmission matched with the valve assembly,and a driving assembly for driving the rocker arm assembly; the rocker arm assembly comprises a rocker arm shaft and rocker arms which are installed on the rocker arm shaft in a swinging mode in the circumferential direction, and the rocker arms are axially and slidably arranged in the axial direction of the rocker arm shaft in a limitable mode; and in the production assembling and market maintenance processes, the valve gasket replacement part disassembling quantity can be effectively decreased, assembling beats are decreased, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of engines, in particular to an engine valve mechanism and an engine. Background technique [0002] When the engine is running, the valve will expand due to the increase in temperature. If there is no gap or the gap is too small between the valve and its transmission parts in the cold state, then in the hot state, the thermal expansion of the valve and its transmission parts will inevitably cause the valve to close tightly, causing the engine to leak during the compression stroke and power stroke. gas, so that the power is reduced, and it is even difficult to start in severe cases. In order to eliminate this phenomenon, usually when the engine is assembled in a cold state, a certain gap is left in the valve and its transmission mechanism to compensate for the expansion of the valve after being heated; and in the prior art, the valve gap adjustment adopts valve screw adjustment and There are two ways to adjust the va...

AI Technical Summary

Problems solved by technology

If there is no gap or the gap is too small between the valve and its transmission parts in the cold state, then in the hot state, the thermal expansion of the valve and its transmission parts will inevitably cause the valve to close tightly, causing the engine to leak during the compression stroke and power stroke. Gas, so that the power is reduced, and it is even difficult to start in severe cases

In order to eliminate this phenomenon, usually when the engine is assembled in a cold state, a certain gap is left in the valve and its transmission mechanism to compensate for the expansion of the valve after being heated; and in the prior art, the valve gap adjustment adopts valve screw adjustment and There are two ways to adjust the valve gasket; the valve gasket adjustment method has the advantages of wear resistance and is widely used; however, when replacing the valve gasket, too many parts need to be disassembled and the replacement operation is cumbersome, resulting in low efficiency , especially in mass production. In the production process, a valve clearance must be selected for confirmation, and then the valve rocker shaft and valve rocker assembly must be removed, and then a suitable valve gasket should be selected for replacement, and the valve rocker assembly and valve assembly must be reinstalled. Valve rocker shaft, long assembly cycle

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