Internal-combustion engines – Poppet valve operating mechanism – Tappet
Patent
1991-08-07
1992-06-02
Cross, E. Rollins
Internal-combustion engines
Poppet valve operating mechanism
Tappet
123 9052, 74569, F01L 114, F01L 124
Patent
active
051177870
ABSTRACT:
A self-adjusting hydraulic valve tappet arranged in a guide bore of a cylinder head of an internal combustion engine and comprising a cup-shaped housing which surrounds a hollow cylindrical wall which is closed at one end by a bottom against which a control cam bears on the outside, the housing comprising a cylindrical guide sleeve which is concentric with the hollow cylindrical wall and which at its end facing away from the bottom opens into the center of a disc member which at its outer periphery merges into the hollow cylindrical wall of the housing, the actual hydraulic clearance compensation element being guided longitudinally displaceably in the guide sleeve and an annular oil reservoir being defined by the hollow cylindrical wall, the cylindrical guide sleeve, the bottom and the disc member and supplied with oil from the lubricating oil circuit of the internal combustion engine via a bore arranged in the hollow cylindrical wall, the annular oil reservoir being provided with an air vent bore in one of its delimiting walls, characterized in that at one point of a wall delimiting the oil reservoir and which is in sliding contact with an adjacent structural component at least during the phase in which the base circle of the control cam bears against the bottom of the valve tappet, a bore is provided which opens into the sliding gap defined by these components.
REFERENCES:
patent: 4688525 (1987-08-01), Nakamura
patent: 4787347 (1988-11-01), Schaeffler
patent: 4800851 (1989-01-01), Hertrich et al.
patent: 4867114 (1989-09-01), Schaeffler
patent: 4945871 (1990-08-01), Tsuruta
patent: 4976230 (1990-12-01), Voigt
patent: 5018488 (1991-05-01), Randle
Cross E. Rollins
INA Walzlager Schaeffler KG
Lo Weilun
LandOfFree
Self-adjusting hydraulic valve tappet does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Self-adjusting hydraulic valve tappet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-adjusting hydraulic valve tappet will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2222459