Valve tappet actuated by a cam of an internal combustion engine

Details Valve tappet actuated by a cam of an internal combustion engine Valve tappet actuated by a cam of an internal combustion engine

1999-11-09

2000-05-23

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

Tappet

123 9051, F01L 125

Patent

active

06065435&

ABSTRACT:
A valve tappet actuated by a cam of an internal combustion engine comprises a cup (1) having a hollow cylindrical skirt (2) and a cup bottom (3) which closes the skirt (2) at one end. On an outer surface, the skirt (2) comprises a peripheral groove (4), and on an inner surface, at least one bead (5). Concentrically arranged within the cup (1) is an inner element (6) whose casing (9) bears against the bead (5, 21). A hydraulic valve clearance compensation element (10) is guided for axial displacement in the inner element (6). To simplify the manufacturing of this valve tappet, it is proposed that the cup (1) is hardened in a heat treatment process, and the inner element (5) is unhardened.

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patent: 5664530 (1997-09-01), Ammon et al.
patent: 5673662 (1997-10-01), Rigamonti
patent: 5870985 (1999-02-01), Bretting

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