JPS61147343U

JPS61147343U -

Info

Publication number: JPS61147343U
Application number: JP3047385U
Authority: JP
Priority date: 1985-03-04
Filing date: 1985-03-04
Publication date: 1986-09-11

Description

[Brief explanation of the drawing]

第１図は、本考案の一実施例に係る低騒音エン
ジンの側面図、第２図は、第１図において矢印Ｃ
方向から見た第１のタイミングプーリと第２のタ
イミングプーリとの側面図、第３図は、従来のエ
ンジンの側面図、第４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５図は、第４
図のジヤーナル軸受部の拡大縦断面図、第６図は
、本出願人が以前に出願した本考案と同一の技術
的課題を達成するための低騒音エンジン（但し、
未公知）の側面図である。１，２……カムシヤフトプーリ、３……クラン
クプーリ、４……タイミングベルト、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、１３……ピスト
ン、２９……シリンダブロツク、３１……第１の
タイミングプーリ、３２……第２のタイミングプ
ーリ、３４……サブタイミングベルト。 FIG. 1 is a side view of a low-noise engine according to an embodiment of the present invention, and FIG. 2 is an arrow C in FIG.
3 is a side view of a conventional engine; FIG. 4 is an explanatory diagram illustrating the mechanism of engine noise generation; Figure 5 shows the fourth
FIG. 6 is an enlarged longitudinal cross-sectional view of the journal bearing shown in FIG.
FIG. 1, 2...Camshaft pulley, 3...Crank pulley, 4...Timing belt, 7...Crankshaft, 8, 9...(Camshaft), 8
... Intake side camshaft, 9 ... Exhaust side camshaft, 10 ... Low noise engine, 13 ... Piston, 29 ... Cylinder block, 31 ... First timing pulley, 32 ... Second timing pulley, 34 ...Sub timing belt.

Claims

[Scope of utility model registration request]

A crank pulley is attached to the tip of the crankshaft, and a first crank pulley is attached to the cylinder block.
A timing pulley and a second timing pulley are provided, the first timing pulley and the second timing pulley are integrally connected and rotatable relative to the cylinder block, and the camshaft A timing belt is wound between the camshaft pulley attached to the tip of the crankshaft pulley and the first timing pulley, and a sub-timing belt is wound between the crank pulley and the second timing pulley. A low-noise engine characterized in that the direction of the force exerted by the tension of the sub-timing belt on the crankshaft is substantially opposite to the direction of the top dead center of the piston.