Internal-combustion engines – Poppet valve operating mechanism – Tappet
Patent
1990-01-31
1990-08-28
Okonsky, David A.
Internal-combustion engines
Poppet valve operating mechanism
Tappet
F01L 124
Patent
active
049516191
ABSTRACT:
A self-adjusting hydraulic valve tappet arranged in a guide bore of a cylinder head of an internal combustion engine and against one end face of which a control cam abuts and which on the other side bears against the end of a valve stem with its second end face, the valve tappet comprising a cup-shaped housing consisting of a hollow cylindrical wall closed at one end by a bottom against which the control cam abuts from outside and which is provided with a cylindrical guide sleeve concentric with the hollow cylindrical wall and extending at one end towards the bottom and at the other into the center of a disk member which with its outer periphery merges into the hollow cylindrical wall of the housing whereby between the hollow cylindrical wall and the cylindrical guide sleeve an annular oil reservoir supplied with oil through a bore leading to the out-side is defined, the actual hydraulic clearance compensation element being guided longitudinally displaceably in the guide sleeve and formed by an inner piston and an outer piston engaging over this.
REFERENCES:
patent: 4465038 (1984-08-01), Speil
patent: 4590898 (1986-05-01), Buente et al.
patent: 4635593 (1987-01-01), Kodama
patent: 4648360 (1987-03-01), Schaeffler
patent: 4688525 (1987-08-01), Nakamura
patent: 4721076 (1988-01-01), Goppelt et al.
patent: 4779583 (1988-10-01), Laffter et al.
patent: 4825823 (1989-05-01), Schaeffler
patent: 4876997 (1989-10-01), Zorn et al.
INA Walzlager Schaeffler KG
Lo Weilun
Okonsky David A.
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