Hydraulic valve play equalization element

Details Hydraulic valve play equalization element Hydraulic valve play equalization element

1993-02-03

1994-03-22

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

Tappet

123 9055, 74569, F01L 124

Patent

active

052954609

ABSTRACT:
A hydraulic valve play equalization element for the valve drive of an internal combustion engine is disclosed. The equalization element comprises an inner tappet and an outer tappet arranged to move relative to one another in the axial direction. The outside tappet is formed by an essentially cup-shaped housing with a level bottom and the inside tappet and the outside tappet delimit an oil-filled storage space which is sealed towards the outside and which can change in volume. A displacement element to equalize volume changes is enclosed in the storage space. The outside tappet is formed by an essentially tube-shaped mantle of thermoplastic material, which has slide surfaces radially inside and outside. The mantle is closed off with a fluid seal, by a disk structured as an expeller, in the direction of a cam shaft that is used. The inside slide surface encloses the inside tappet, resting against its circumference, and forming a fluid seal.

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patent: 5159907 (1992-11-01), Budde

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