Leaf valve or leaf valve assembly

Abstract

A reed valve or reed valve assembly that has a structure that can withstand excessive pressure even with a thin reed and has high followability. This reed valve (20) includes a plate-shaped support base plate (21) with a valve hole (22) extending through the plate thickness direction in a central portion, and one surface of the support base plate (21) covering the valve hole (22). And a plate-shaped, flexible reed (24) is fixedly arranged at one end in the length direction. Furthermore, the support base plate (21) has a center line extending along the length direction in the valve hole (22) and connecting the valve hole (22). 22) Reinforcing ribs (27) whose interior is divided into two spaces (22a, 22b). Furthermore, the surface of the reed valve (27) facing the reed (24) is located on approximately the same plane as the surface of the support base plate (21) on which the reed (24) is mounted, or within the valve hole (22). , close to the reed (24).

Description

technical field [0001] The present invention relates to reed valves or reed valve assemblies suitable for supplying air to the intake system or exhaust system of an internal combustion engine (engine), and in particular to reed valves for supplying secondary air to the exhaust port of an engine or reed valve assembly. Background technique [0002] An engine secondary air supply device for restricting exhaust gas to supply the air of the air filter to the exhaust hole to reburn the unburned components contained in the exhaust gas. At this time, a reed valve is provided in the middle of the secondary air supply device so that the air from the air filter is supplied to the exhaust hole and the exhaust gas from the exhaust hole does not flow into the air filter . Therefore, air is supplied from the air cleaner to the exhaust port by utilizing the pressure difference above and below the reed valve generated at the exhaust port by the fluctuation of the exhaust gas. That is, wh...

AI Technical Summary

Problems solved by technology

[0005] However, in the case of the reed valve with the above-mentioned structure, when the pressure on the side of the exhaust hole is suddenly shifted from the state of low pressure to the state of high pressure, excessive pressure may be applied to the reed, and it is necessary to It is necessary to make the plate thickness thicker, but on the other hand, from the viewpoint of improving the followability of the reed valve, it is necessary to make the plate thickness thinner, and there is a problem of how to satisfy both requirements at the same time.

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