Low mass direct acting hydraulic valve lifter

Details Low mass direct acting hydraulic valve lifter Low mass direct acting hydraulic valve lifter

1992-11-17

1993-07-27

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

Tappet

123 9051, 74569, F01L 124

Patent

active

052303080

ABSTRACT:
A direct acting hydraulic valve lifter features in a preferred embodiment a follower assembled with a thin wall metal shell and a light plastic baffle to support a lash adjusting hydraulic element assembly. An inlet riser chamber has sufficient cross section to minimize oil flow restriction in cold oil conditions. Dead space between the shell and baffle is filled with a strong lightweight foam to support and retain the baffle and displace oil for low mass.

REFERENCES:
patent: 4745888 (1988-05-01), Kapp
patent: 4782799 (1988-11-01), Goppelt et al.
patent: 4787347 (1988-11-01), Schaeffler
patent: 4867114 (1989-09-01), Schaeffler
patent: 5119774 (1992-06-01), Krieg et al.

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