Thermal insulation cushion block for mounting exhaust manifold

Abstract

The invention relates to the technical field of vehicles, and in particular, discloses a thermal insulation cushion block for mounting an exhaust manifold. The thermal insulation cushion block comprises a high-temperature resisting thermal insulation cushion block; and a through hole is formed in a main body of the thermal insulation cushion block, and is used for penetrating through a stud for connecting the exhaust manifold with a cylinder cover. In actual application, the thermal insulation cushion block is arranged between the exhaust manifold and a nut for pressing the exhaust manifold, so that the exhaust manifold is separated and spaced from the nut, that is, the two cannot be directly contacted; and compared with the prior art, the thermal insulation cushion block can effectively achieve a thermal insulation effect to prevent looseness of the nut for pressing the exhaust manifold due to excessive temperature so as to cause the air leakage phenomenon.

Description

[0001] technical field [0002] The invention relates to the technical field of automobiles, in particular to a heat insulating pad for installing an exhaust manifold. Background technique [0003] The exhaust manifold has a branch pipeline, which is connected to the engine cylinder head, and can collect the exhaust gas of each cylinder and guide it into the exhaust manifold, such as figure 1 and 2 As shown, on the connecting flange 1b at the intake port of each branch manifold 1a of the exhaust manifold 1, mounting holes for studs are spaced apart along the circumferential direction, and the end faces of the exhaust ports of each cylinder of the cylinder head 2 Correspondingly, there are internal threaded holes on the top. During actual installation, the mounting surface of the connecting flange 1b is fitted to the end surface of the exhaust port of the cylinder head 2, and a sealing gasket ( figure 1 , 2 not shown), so that one end of the stud 3 passes through the mountin...

AI Technical Summary

Problems solved by technology

[0004] from Figure 1-2 It can be seen from the figure that after the actual installation of the exhaust manifold 1 is completed, the nut 4 is in direct contact with the connecting flange 1b on the exhaust manifold 1. Now, with the improvement of the engine performance, the exhaust temperature of the engine is getting higher and higher. High, when the engine is working, especially the supercharged engine, the temperature of the exhaust manifold is very high, sometimes even exceeding the working temperature range of the nut 4, which will cause the nut 4 to loosen and fail, which will inevitably cause air leakage at the sealing gasket

Aiming at the failure of nut 4 due to high temperature, the current general method is to rely on imported, high-temperature-resistant stud 3 and nut 4, but this will undoubtedly increase the production cost, and the purchase cycle is longer

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