JPH0389922U

JPH0389922U -

Info

Publication number: JPH0389922U
Application number: JP15128689U
Authority: JP
Priority date: 1989-12-28
Filing date: 1989-12-28
Publication date: 1991-09-12

Description

[Brief explanation of drawings]

第１図は第１実施例の排気管を示す要部の断面
図、第２図は排気管の外観図、第３図は排気管の
作動説明図、第４図は２実施例の排気管を示す要
部の断面図、第５図は排気管の作動説明図、第６
図は従来技術の説明図、第７図は排気バリ音の音
圧波形と排気脈動流の流速変化の関係を示す図で
ある。１……フロント排気管、２……排気マニホール
ド、３……プリマフラ、４……一方向バルブ。 Figure 1 is a sectional view of the main parts of the exhaust pipe of the first embodiment, Figure 2 is an external view of the exhaust pipe, Figure 3 is an explanatory diagram of the operation of the exhaust pipe, and Figure 4 is the exhaust pipe of the second embodiment. Fig. 5 is an explanatory diagram of the operation of the exhaust pipe, Fig. 6 is a sectional view of the main part showing
The figure is an explanatory diagram of the prior art, and FIG. 7 is a diagram showing the relationship between the sound pressure waveform of exhaust burr noise and the flow velocity change of the exhaust pulsating flow. 1...Front exhaust pipe, 2...Exhaust manifold, 3...Primary muffler, 4...One-way valve.

Claims

[Scope of Claim for Utility Model Registration] In an exhaust system in which an exhaust pipe extends from the engine installed in a car, a system is installed at the upstream position of the exhaust pipe that is operated by the flow of exhaust pulsating flow, and that discharges exhaust gas from the engine of the exhaust pulsating flow. An exhaust pipe characterized in that it is provided with a one-way valve that allows a flow in a positive direction to an outlet and restricts a flow in a negative direction from an exhaust discharge port to an engine.