Air inlet connecting structure of post-stage silencer

Abstract

The invention discloses an air inlet connecting structure of a post-stage silencer. The air inlet connecting structure comprises a post-stage silencer barrel, an inner assembly, a flange connector, a first air inlet pipe, a second air inlet pipe and a driving valve, and the inner assembly is located in the post-stage silencer barrel. A first turned-over opening and a second turned-over opening which are through are formed in the peripheral wall of one side of the post-stage silencer barrel, and one end of the second air inlet pipe is inserted into the post-stage silencer barrel through the second turned-over opening. One end of the first air inlet pipe is inserted into the post-stage silencer barrel through the first turned-over opening and is fixedly connected with the inner assembly. The other ends of the first air inlet pipe and the second air inlet pipe are fixedly connected with the flange connector. The driving valve is fixedly connected with the first air inlet pipe. Reinforcing devices are further arranged on the peripheries of the first turned-over opening and the second turned-over opening. A steel wire liner is arranged at the sleeving position of the first air inlet pipe and the inner assembly in a matched mode. According to the air inlet connecting structure of the post-stage silencer, under the condition that the silencing performance of the post-stage silencer is met, the manufacturing difficulty and the manufacturing cost are greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of automobile exhaust post-treatment, and in particular relates to an intake connection structure of a post-stage muffler. Background technique [0002] In the automobile industry, the rear muffler is one of the necessary components in the automobile exhaust system. The structure and quality of the rear muffler play an important role in reducing the exhaust noise of the engine. [0003] At present, OEMs have put forward more stringent requirements on the noise reduction performance of the rear stage muffler, and at the same time have strict control on the cost of the muffler. The OEM hopes to develop a multi-mode muffler, and the muffler body hopes to be rolled to meet the cost. The rolled muffler package is used, usually the inner components of the muffler are pressed into the muffler package, the air inlet is connected with a transition pipe and the inner components of the muffler to form a ridge, and the...

AI Technical Summary

Problems solved by technology

The intake pipe controlled by the active valve needs to be connected with the main structural pipeline of the muffler and ensure a certain degree of sealing, which makes manufacturability difficult and high manufacturing cost

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