Wear Characteristics of a Roller Follower Variable Valve Timing System

952100

09/01/1995

Event
International Off-Highway & Powerplant Congress & Exposition
Authors Abstract
Content
This study investigates the wear characteristics of a variable valve timing (VVT) system used to vary the phasing of the inlet valve events on a medium speed marine diesel engine.
The running-in properties of critical components within the system are examined.
The effect of surface finish and surface hardness upon wear is examined. It was found that in order to prevent excessive wear between the roller and tappet follower then the roller should be harder than the tappet. Tappet and roller hardness values of 60 and 70 Rockwell Hardness ā€˜Cā€™ (HRC) respectively were found to be satisfactory.
Meta TagsDetails
DOI
https://doi.org/10.4271/952100
Pages
8
Citation
Leonard, H., Stone, C., and Donaldson, C., "Wear Characteristics of a Roller Follower Variable Valve Timing System," SAE Technical Paper 952100, 1995, https://doi.org/10.4271/952100.
Additional Details
Publisher
Published
Sep 1, 1995
Product Code
952100
Content Type
Technical Paper
Language
English