Multi-segment type exhaust pipe structure

Abstract

The invention discloses a multi-segment type exhaust pipe structure. The multi-segment type exhaust pipe structure comprises tail-end exhaust pipes located at the two sides of an array. Multiple middle exhaust pipes are arranged between the two tail-end exhaust pipes. One or more pressurization exhaust pipes are further arranged between the two tail-end exhaust pipes. A pressurizer gas outlet is formed in the wall face of each pressurization exhaust pipe. Each pressurization exhaust pipe is arranged between every two adjacent middle exhaust pipes. The tail-end exhaust pipes, the middle exhaust pipes and the pressurization exhaust pipes are connected with one another through metal corrugated pipes. According to the multi-segment type exhaust pipe structure, the exhaust pipes are connected into a whole by welding the metal corrugated pipes; complete sealing is achieved at connection positions of the exhaust pipes; inter-pipe leakage of the exhaust pipes is completely eradicated; the metal corrugated pipes can extend and contract freely; the influence of thermal deformation of the exhaust pipes is eliminated; and damage to exhaust pipe gaskets is reduced, and thus the service life of each exhaust pipe gasket is prolonged.

Description

technical field [0001] The invention belongs to the technical field of engines, in particular to a multi-stage engine exhaust pipe structure. Background technique [0002] With the strengthening of engines and technology upgrades, the exhaust temperature, braking power and exhaust back pressure of commercial vehicle engines continue to increase, and the sealing performance of engine exhaust systems is facing the challenge of high temperature and high pressure. At present, most of the existing upright 6-cylinder commercial vehicle engine exhaust pipelines adopt a three-section structure, and the joints of the sections are sealed with a metal sealing ring and a ring groove. Sealing, and under high temperature and high pressure working conditions, its sealing performance is relatively poor. During the cold start of the engine, the blow-by phenomenon is more serious. Especially for medium-duty and heavy-duty commercial vehicle diesel engines, when the application of engine bra...

AI Technical Summary

Problems solved by technology

At the same time, by adopting a multi-stage exhaust pipe structure, each exhaust manifold is completely separated, which effectively solves the problem of large deformation of the exhaust pipe, reduces the extrusion effect on the exhaust pipe gasket, and can prolong the exhaust time. Service life of pipe gasket

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