Direct acting hydraulic tappet

Details Direct acting hydraulic tappet Direct acting hydraulic tappet

1993-06-17

1994-06-14

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

Tappet

123 9055, 74569, 2988843, F01L 124

Patent

active

053200748

ABSTRACT:
A direct acting hydraulic tappet including a one piece body shell having an outer cylinder, an inner cylinder and a plurality of integral axially extending webs that connect the outer cylinder and the inner cylinder. A cam face member is attached to one end of the body. An oil hole extends from the outer surface of the outer cylinder through one of the webs to an inner surface of the inner cylinder. The hydraulic lash compensating unit is positioned in the inner cylinder. The body shell is made from an extruded length of aluminum and is preferably coated with a Teflon impregnated anodized coating. The cam face is made of steel, cast iron or ceramic and is attached to the one end of the body shell by electromagnetic deformation or by the use of adhesive.

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G. Maas, D. Schmidt, W. Speil, "Performance of Hydraulic Lash Adjusters with Regard to Valve Train Noise at Cold Starts and Short Term Start" 1990 -SAE Technical Paper Series Mar. 1990.

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