JPS61190414U

JPS61190414U -

Info

Publication number: JPS61190414U
Application number: JP7481285U
Authority: JP
Priority date: 1985-05-20
Filing date: 1985-05-20
Publication date: 1986-11-27

Description

[Brief explanation of the drawing]

第１図は本考案の実施例に係るプリマフラの構
成図、第２図はエンジン回転数が低い場合の本実
施例のプリマフラの使用状態説明図、第３図はエ
ンジン回転数が高い場合の本実施例のプリマフラ
の使用状態説明図、第４図は従来におけるプリマ
フラを示す図である。１……プリマフラ、２……孔、３……導入内管
、３ａ……導入内管の端部、４……導出外管、５
……開閉弁、６……駆動部。 Fig. 1 is a configuration diagram of a pre-muffler according to an embodiment of the present invention, Fig. 2 is an explanatory diagram of the usage state of the pre-muffler of this embodiment when the engine speed is low, and Fig. 3 is a diagram showing how the pre-muffler is used when the engine speed is high. FIG. 4, which is an explanatory diagram of the usage state of the pre-muffler according to the embodiment, is a diagram showing a conventional pre-muffler. 1...Primary muffler, 2...hole, 3...introduction inner pipe, 3a...end of introduction inner pipe, 4...outlet outer pipe, 5
...Opening/closing valve, 6...Drive unit.

Claims

[Claims for Utility Model Registration] (1) An introduction inner pipe in which a plurality of holes are bored;
A pre-muffler comprising an outer lead-out pipe that surrounds the inner lead-in pipe, and an on-off valve that is provided at the end of the inner lead-in pipe and opens and closes depending on the operating speed. (2) The plurality of holes in the inner introduction pipe are bored in the vicinity where the inner introduction pipe penetrates the end of the outer lead-out pipe, and the plurality of holes and the on-off valve allow the inner introduction pipe to become a branch pipe. 1. A primal muffler according to claim (1) of the utility model registration, characterized in that: (3) Utility model registration claim No. 1 characterized in that the on-off valve is in a closed state when the engine speed is low.
Primarily muffler described in (1). (4) Utility model registration claim No. 1 characterized in that the on-off valve is in an open state when the engine speed is high.
Primarily muffler described in (1).