Internal-combustion engines – Poppet valve operating mechanism – Tappet
Patent
1986-11-10
1988-08-09
Wolfe, Jr., Willis R.
Internal-combustion engines
Poppet valve operating mechanism
Tappet
123 9056, F01L 124
Patent
active
047621001
ABSTRACT:
A self-contained lash adjuster includes a generally cup-shaped follower having an end face and a lash adjuster cartridge assembly positioned within the follower. The cartridge assembly includes a body positioned against the follower end face and a reciprocally movable plunger within the body. There is a high pressure chamber between the plunger and the body, a plunger passage opening into the high pressure chamber and a check valve which controls fluid flow through the plunger passage. The plunger has an open end spaced from the high pressure chamber and there is a valve stem pad closing the plunger open end. An annular expandable seal member defines a reservoir about the cartridge assembly and is fastened at one end to the body and at the other end to the plunger. The seal member extends in part between the plunger and the valve stem pad. The plunger has openings therein in communication with the reservoir.
REFERENCES:
patent: 2874684 (1959-02-01), Thompson
patent: 3521608 (1970-07-01), Scheibe
patent: 4397271 (1983-08-01), Garder
patent: 4590899 (1986-05-01), Kowal et al.
patent: 4624225 (1986-11-01), Kowal
patent: 4649875 (1987-03-01), Mirone et al.
Macy M.
Stanadyne Inc.
Wolfe, Jr. Willis R.
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