Tappet in an internal combustion engine and a method of manufact

Details Tappet in an internal combustion engine and a method of manufact Tappet in an internal combustion engine and a method of manufact

1996-05-03

1997-03-11

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

Tappet

123 9048, 74569, F01L 114

Patent

active

056091281

ABSTRACT:
A tappet in a direct acting type valve operating mechanism of an internal combustion engine comprises a top wall and a cylindrical portion. The upper and lower surfaces of the top wall contacts a rotary cam and the end of a stem of an engine valve respectively. A hard metal layer is formed at the upper and lower surfaces of the top wall to increase strength thereof, thereby increasing wear resistance and durability of the tappet.

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