Internal-combustion engines – Poppet valve operating mechanism – Tappet
Patent
1998-09-11
2000-03-07
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
Tappet
123 905, F01L 124, F01L 114
Patent
active
06032631&
ABSTRACT:
In a tappet (1) of a valve train of an internal combustion engine, the leakage of hydraulic medium occurring between its reception bore (6) and skirt (2) is to be reduced. To achieve this, the tappet (1) of the invention comprises an anti-rotation device (22) and, at the same time, a supply of hydraulic medium from a supply gallery (21) to an annular oil reservoir (17) is effected directly, i.e. annular grooves and other oil deflecting measures are dispensed with. An aperture (19) in the skirt (2) for the supply of hydraulic medium can, at the same time, be advantageously arranged in a bottom-proximate region thereof.
REFERENCES:
patent: 4648360 (1987-03-01), Schaeffler
patent: 4747376 (1988-05-01), Speil et al.
patent: 4756282 (1988-07-01), Kunz et al.
patent: 5188068 (1993-02-01), Geterman et al.
patent: 5450826 (1995-09-01), Speil
patent: 5636604 (1997-06-01), Speil
patent: 5651335 (1997-07-01), Elendt et al.
Patent Abstracts of Japan, vol. 12, No. 212 (4 pgs) 63-16112, Jan. 1988.
Haas Michael
Speil Walter
Ina Walzlager Schaeffler OHG
Lo Weilun
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