Study of Piston Pin Noise of Semi-Floating System Honda R&D Company, Limited

Format:

Conference/Event

Author/Creator:

Kondo, Kondo, author.

Contributor:

Ohbayashi, Hisayuki

Conference Name:

SAE 2012 World Congress & Exhibition (2012-04-24 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2012

Summary:

This paper summarizes the piston pin noise mechanism and show the way to reduce noise level of semi-floating system. A mechanism of piston pin noise of semi-floating system was clarified by measurement of piston and piston pin behavior and visualization of engine oil mist around piston and piston pin. Piston and piston pin behavior was measured by accelerometer and eddy current type gap sensor with linkage system at the actual engine running condition. Engine oil behavior was visualized and measured its flow vector by Particle Tracking Velocimetry (PTV). For PTV, engine oil mist particle image was taken by high speed camera with fiber scope attached to linkage system. From themeasurement, it was cleared that engine oil doesn't reach to piston hole from undersurface of piston land and come rushing out from piston broach via groove. The result shows that lacking of engine oil between piston and piston pin makes noise larger. This is the key point of clarification of piston pin noise mechanism and countermeasure for piston. Finally, semi-floating piston pin noise level was reached to almost same as full-floating system by application of oil flow control shape for piston

Notes:

Vendor supplied data

Publisher Number:

2012-01-0889

Access Restriction:

Restricted for use by site license