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Application of Ceramics to the Sliding Seat of Valve Bridge
Published October 21, 1997 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Spring Conference
For use in the valve train, using an OHV (over head valve) configuration, of a 4 valve diesel engine for trucks and buses; we developed a valve bridge, a component of a valve train, with a ceramic head that is made of silicon nitride (Si3N4) in contact with a rocker arm in order to reduce cost and improve wear resistance for further diesel engine emissions regulations.
In order to evaluate the effect of this valve bridge, RIG tests and durability tests on actual engines were carried out.