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박중철(Joong Cheul Park),조점석(Jum Seok Cho),송전영(Jeon Young Song) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
Crankshaft damper pulley bolt is to fix sprocket, sensing blade, damper pulley and air conditioner pulley to the crankshaft. If preload of crankshaft damper pulley bolt is reduced by some reasons, then the bolt occurs loosening, finally engine hesitation and acceleration inferiority occur by slip between crankshaft and sensing blade. Crankshaft damper pulley bolt is under torsional loading condition because of revolution resistance of the each auxiliary pulley caused by acceleration and deceleration of the crankshaft. This study investigates mechanism of reducing preload and loosening factor of crankshaft damper pulley bolt.