Ceramic materials such as silicon nitride and sialon are known for their excellent wear-resistance and scuffing-resistance even under high contact pressure and poor lubrication1. However, ceramic materials, which have excellent sliding properties, are not widely adopted for valve train components, at present. A main reason for this is their high cost. A ceramic cam follower, newly developed by utilizing the direct brazing technology, has the following features and can be produced at the lowest cost: Ceramic cam followers manufactured by the direct brazing were evaluated using a heat cycle tester and a cam motoring tester which could apply repeated impacts, to verify reliability and durability. Neither cracks nor break-away problems occurred after these endurance tests.This paper describes the direct brazing technology for the ceramic cam followers, which were first adopted for the mass-produced engines in 1993.
Development of an Inexpensive, Highly Wear-Resistant Ceramic Cam Follower - Part 2 Brazing Technology
Sae Technical Papers
International Pacific Conference On Automotive Engineering ; 1993
1993-11-01
Conference paper
English
Ceramics , Heat treatment , Steel , Joining , Valve trains
Automotive engineering | 1993
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