Stainless steel exhaust manifold of quadruple cylinder engine

Abstract

A stainless steel exhaust manifold of a quadruple cylinder engine comprises a gas inlet flange, a first exhaust branch pipe, a second exhaust branch pipe, a third exhaust branch pipe, a fourth exhaust branch pipe, a master exhaust pipe, a connection pipe, a reinforced support, a gas outlet flange and an oxygen sensor installation nut; the gas inlet ends of the first exhaust branch pipe, the second exhaust branch pipe, the third exhaust branch pipe and the fourth exhaust branch pipe are connected with the gas inlet flange; the gas outlet ends of the first exhaust branch pipe, the second exhaust branch pipe, the third exhaust branch pipe and the fourth exhaust branch pipe are connected with the master exhaust pipe; the connection pipe is connected with the gas outlet end of the master exhaust pipe; the gas outlet flange is connected with the gas outlet end of the connection pipe; the oxygen sensor installation nut is installed on the connection pipe and is communicated with the connection pipe; the reinforced support is connected between the gas inlet flange and the connection pipe. The stainless steel exhaust manifold of the quadruple cylinder engine is reasonable in design and simple in structure, installation convenience is fully considered, and high assembly efficiency is achieved. Meanwhile, few invested dies are needed by early development, the cost is low, development expenses of products are reduced greatly, and the development cycle of products is shortened.

Description

technical field [0001] The invention relates to an engine exhaust device, in particular to a stainless steel exhaust manifold for a four-cylinder engine. Background technique [0002] There are four exhaust outlets on the cylinder head of the four-cylinder engine of the car. The exhaust gas from all the exhaust outlets is collected into one pipeline by installing the exhaust manifold, and then undergoes the oxidation-reduction reaction of the catalytic converter, and at the same time passes through the muffler of the muffler. , the exhaust gas is vented to the atmosphere. [0003] At present, the main structure of most exhaust manifolds is a bent pipe manifold with a circular pipe cross section, and the parts are stamped manifolds welded after stamping and forming of steel plates. [0004] For the stamped manifold, the mold must be opened in the early development and production of the prototype, which requires a lot of cost. If the performance cannot meet the expected goal,...

AI Technical Summary

Problems solved by technology

[0006] Since the exhaust temperature of the engine is as high as 900°C, and accompanied by the vibration of the engine, the manifold works under the harsh conditions of high temperature, high pressure and high vibration, and there is a risk of cracking in weak places, which will eventually cause failure forms such as manifold leakage and fracture.

[0007] In a more serious situation, the leaked high-temperature gas may cause some combustibles in the engine compartment to reach the ignition point, which may lead to a fire in the engine compartment

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