Piston Pin Noise Analysis of Press Fit Type Piston (Semi-floating System) (Third Report)

― Optimizing of Piston Form by using CAE ―

Abstract

In this research, it is a goal to reduce the piston pin noise for the press fit type as same level as full floating type. It is clear from the mechanism analysis of the pin noise that an oil film flow inside a pin boss is an important factor for pin noise reduction. It is also clear by using oil film simulation that pin noise is extremely highly correlated with peak radial acceleration of the pin behavior. The pin noise of press fit type is reduced to the same level as full floating type by applying pin boss form to which evaluation parameter becomes the optimal to a piston.