JPH0462319U

JPH0462319U -

Info

Publication number: JPH0462319U
Application number: JP10261090U
Authority: JP
Priority date: 1990-09-29
Filing date: 1990-09-29
Publication date: 1992-05-28

Description

[Brief explanation of the drawing]

第１図は本考案の実施例を示し、縦型空冷側弁
式エンジンに付設したマフラカバー部分の一部切
り欠き縦断面図、第２図は第１図の部分拡大図で
ある。第３図は従来の実施例を示し第１図に相当
する図である。１……エンジン、２……マフラ本体、３……冷
却風通風空間、４……マフラカバー、５……排気
口、６……冷却風出口、７……アウタパイプ、８
……インナパイプ、９……内側壁、１０……外側
壁、１１……通風間隙、１２……外気導入室、１
３……外気導入孔。 FIG. 1 shows an embodiment of the present invention, and is a partially cutaway vertical sectional view of a muffler cover attached to a vertical air-cooled side valve type engine, and FIG. 2 is a partially enlarged view of FIG. 1. FIG. 3 shows a conventional embodiment and is a diagram corresponding to FIG. 1. 1...Engine, 2...Muffler body, 3...Cooling air ventilation space, 4...Muffler cover, 5...Exhaust port, 6...Cooling air outlet, 7...Outer pipe, 8
... Inner pipe, 9 ... Inner wall, 10 ... Outer wall, 11 ... Ventilation gap, 12 ... Outside air introduction chamber, 1
3...Outside air introduction hole.

Claims

[Claims for Utility Model Registration] The outer periphery of the muffler body 2 attached to the engine 1 is covered with a muffler cover 4, and a cooling air ventilation space 3 is formed between the muffler body 2 and the muffler cover 4. In an engine muffler in which the exhaust port 5 and the cooling air outlet 6 of the muffler cover 4 are arranged coaxially, an outside air introduction chamber 1 is provided in the exhaust port forming part in the muffler body 2.
2, and the outer wall 1 of this outside air introduction chamber 12
A cooling ventilation ventilation space 3 is created by providing an outside air introduction hole 13 in 0.
The inner pipe 8 is arranged to penetrate through the inner wall 9 of the outer air introduction chamber 12, and the outer pipe 7 is arranged to pass through the outer wall 10 of the outer air introduction chamber 12. The inner pipe 8 and the outer pipe 7 are positioned coaxially with the outer end of the inner pipe 8 protruding into the inner end of the outer pipe 7, and between the inner circumferential surface of the outer pipe 7 and the outer circumferential surface of the inner pipe 8. This muffler for an engine is characterized in that a ventilation gap 11 is formed and the outer end of the outer pipe 7 faces the cooling air outlet 6 within the muffler cover 4.