コンロッド／クランク軸／エンジンブロックと達成したピストンスラップ解析法の研究

摘要

This paper presents the analytical method to evaluate the impact force induced by piston slap considering the dynamic effect of motion and vibration of piston, connecting rod, crank shaft and engine block. The inertia force of connecting rod in vertical, horizontal and rotational direction are taken into consideration and the effects of these inertia forces on the piston impact force and main bearing impact force of crank shaft are discussed comparing with the conventional simulation method in which the inertia force of connecting rod is idealized as the added mass to the piston and crank pin. The difference of the wave form of piston slap force is recognized between the present method and the conventional method. Moreover, influences of motion and vibration of piston and connecting rod upon the crank shaft vibration and main bearing impact force are examined. The effect of the coupled vibration is seen in the wave form of the torsional vibration of the crank shaft and main bearing impact force in the horizontal direction.%エンジ鯛却倣力，クランク軸こよる主軸受衝撃力とピストンがライナに衝突するピストンスラップであるといとオしてレヽる.輪こピストンスラッフ1こ関してはエンジ欄こも大きな影響を及ぼすので，その低減を目指してこれまで多くの研究がおこなわれてきた.著者らはピストン単体の並進と回転運軌　スカート敵欄脈ライナの弾性振動を考慮した解析法を開発し~((1))，それらを用いてピストンピンオフセットの影響やピストン熱変形形状の違いによるピストンスラップカの変化などを検討した~((2)).