JPS63123722U

JPS63123722U -

Info

Publication number: JPS63123722U
Application number: JP1480487U
Authority: JP
Priority date: 1987-02-03
Filing date: 1987-02-03
Publication date: 1988-08-11
Anticipated expiration: 2002-02-03
Also published as: JPH051622Y2

Description

[Brief explanation of the drawing]

第１図から第３図は本考案の第１実施例を示し
ており、第１図は船外機を一部破断して示した側
面図、第２図は主要部を示す拡大断面図、第３図
は第２図の矢視拡大図、第４図及び第５図は本
考案の第２実施例を示しており、第４図は第３図
と同様の拡大図、第５図は第４図の―線に沿
う断面図、第６図から第８図は本考案の第３実施
例を示しており、第６図は主要部を示す拡大断面
図、第７図は第６図の矢視拡大図、第８図は第
７図の―線に沿う断面図である。１……船外機、２……エンジン、３……オイル
パン、１１……排気膨張空間、１２……ケーシン
グ、１９……排気膨張室、１９ａ……排気導入孔
、２１……排気通路。 1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a partially cutaway side view of the outboard motor, FIG. 2 is an enlarged sectional view showing the main parts, Fig. 3 is an enlarged view of Fig. 2 in the direction of the arrows, Figs. 4 and 5 show a second embodiment of the present invention, Fig. 4 is an enlarged view similar to Fig. 3, and Fig. 5 is an enlarged view of Fig. 2. FIG. 4 is a sectional view taken along line -, and FIGS. 6 to 8 show a third embodiment of the present invention, FIG. 6 is an enlarged sectional view showing the main parts, and FIG. FIG. 8 is a cross-sectional view taken along line - in FIG. 7. 1... Outboard motor, 2... Engine, 3... Oil pan, 11... Exhaust expansion space, 12... Casing, 19... Exhaust expansion chamber, 19a... Exhaust introduction hole, 21... Exhaust passage.

Claims

[Scope of Claim for Utility Model Registration] 1. An idling engine exhaust system for an outboard motor that has an oil pan at the bottom of the engine and discharges engine exhaust into the water through an exhaust expansion space in a casing during cruising, which has an exhaust introduction hole. The oil pan is characterized in that an exhaust expansion chamber is provided at the bottom of the oil pan, and an exhaust passage is provided for discharging the exhaust gas introduced into the exhaust expansion chamber from the exhaust introduction hole into the atmosphere outside the casing. Outboard motor exhaust system. 2. The oil pan has an outer surface forming side wall portion forming a part of the outer surface of the casing, and the exhaust passage is formed within the outer surface forming side wall portion,
The outboard motor according to claim 1, wherein the outboard motor is a communication passage having an inlet opening into the exhaust expansion chamber and an outlet communicating with the inlet and opening to the outside. exhaust system.