JPS61145835U

JPS61145835U -

Info

Publication number: JPS61145835U
Application number: JP2891985U
Authority: JP
Priority date: 1985-02-28
Filing date: 1985-02-28
Publication date: 1986-09-09

Description

[Brief explanation of drawings]

第１図は、本考案の一実施例に係る低騒音エン
ジンの正面図、第２図は、従来のエンジスの正面
図、第３図は、エンジンの騒音発生のメカニズム
を説明する説明図、第４図は、第３図のジヤーナ
ル軸受部の拡大縦断面図である。１，２……カムシヤフトプーリ、３……クラン
クシヤフトタイミングプーリ、４……タイミング
ベルト、６……サブクランクシヤフトタイミング
プーリ、７……クランクシヤフト、８，９……（
カムシヤフト）、８……吸気側カムシヤフト、９
……排気側カムシヤフト、１０……低騒音エンジ
ン、３２……サブアイドルプーリ、３３……Ｖベ
ルト（ベルト）。 FIG. 1 is a front view of a low-noise engine according to an embodiment of the present invention, FIG. 2 is a front view of a conventional engine, and FIG. 3 is an explanatory diagram illustrating the mechanism of engine noise generation. FIG. 4 is an enlarged longitudinal sectional view of the journal bearing portion of FIG. 3. 1, 2...Camshaft pulley, 3...Crankshaft timing pulley, 4...Timing belt, 6...Sub crankshaft timing pulley, 7...Crankshaft, 8, 9...(
camshaft), 8...Intake side camshaft, 9
...Exhaust side camshaft, 10...Low noise engine, 32...Sub idle pulley, 33...V belt (belt).

Claims

[Scope of utility model registration request]

A crankshaft timing pulley and a sub-crankshaft timing pulley are attached to the tip of the crankshaft, and a timing belt is wound between the camshaft pulley attached to the tip of the camshaft and the crankshaft timing pulley. A sub-idle pulley is provided in a direction substantially opposite to the direction in which the tension of the timing belt applies to the crankshaft, and a belt is provided between the sub-idle pulley and the sub-crankshaft timing pulley. A low-noise engine characterized in that the belt is wound around the timing belt, and the tension of the timing belt is approximately equal to the tension of the timing belt.