Engine exhaust system sealing gasket

Abstract

The invention discloses an engine exhaust system sealing gasket, and relates to the technical field of internal combustion engines. The sealing gasket is provided with an exhaust hole in a penetratingmode and bolt installing holes; the sealing gasket comprises a first layer gasket, a limiting layer gasket and a second layer gasket which are overlapped from top to bottom, the first layer gasket and the second layer gasket are provided with inwards concave arc-shaped sealing ribs abutting against the inwards concave bottom, and the sealing ribs surround the exhaust hole; the limiting layer gasket is arranged on the outer sides of the inwards concave arc-shaped sealing ribs; and bolt installing holes are formed in the zones, making contact with the first layer gasket and the second layer gasket, of the limiting layer gasket. Through the engine exhaust system sealing gasket provided by the invention, the problem of gasket ablation caused by high temperature or air leakage caused by gasketsealing rib fatigue failure is solved, and the risk that a sealing surface is pressed to be concave due to the fact that the surface pressure of the portions of the sealing ribs is too high, and airleakage is caused can be reduced.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to an engine exhaust system sealing gasket. Background technique [0002] The exhaust system is an important part of the engine. With the continuous upgrading of engine emissions, when the engine is working, the temperature of the high-temperature exhaust gas discharged from the combustion chamber is getting higher and higher. The high-temperature gas first enters the exhaust manifold through the exhaust port of the cylinder head, and then It enters the supercharger, and finally passes through the exhaust pipe after the supercharger vortex, and enters the atmosphere after being treated by the catalytic muffler. In order to ensure the normal operation and safety of the engine, and prevent the leaked high-temperature gas from damaging other parts of the engine and the high temperature from causing harm to the human body, the connection parts of the exhaust system m...

AI Technical Summary

Problems solved by technology

[0010] Aiming at the problems existing in the prior art, the present invention provides an engine exhaust system sealing gasket, which not only solves the problem of air leakage caused by gasket ablation caused by high temperature or fatigue failure of the gasket sealing rib, but also reduces the surface area of ​​the sealing rib. The risk of air leakage due to the sealing surface being dented due to excessive pressure

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