Roller-Tappets have been adopted on the valve train systems of OHV type diesel engines, due to their low friction losses. When a roller-tappet is actuated by the cam, it moves upwards and downwards in the guide with a slight skew motion. This motion affects the life of cam and tappets. The purpose of this study was, therefore, to establish the skew estimation method. The skew motion was measured under the engine motoring condition, and its calculation based on the assumed mechanism was carried out. The calculated skew motion showed good agreement with the measured.
A Study on the Measurement and Estimation Method of Skew Motion of Roller-Tappets in an OHV Type DI Diesel Engine
Sae Technical Papers
Powertrain & Fluid Systems Conference and Exhibition ; 2006
2006-10-16
Conference paper
English
Automotive engineering | 2006
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