Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1991-03-04
1992-05-05
Cross, E. Rollins
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9017, 123 9031, 474110, 474111, F01L 134, F01L 104
Patent
active
051098130
ABSTRACT:
An arrangement and method for the hydraulic tensioning and adjusting of a camshaft chain drive has a chain which winds around both camshafts. Together with its tensioning arrangement, the chain is shifted into its transverse direction. The load end of the chain is thus lengthened, and the loose end of the chain is shortened, or vice versa. Engine oil can be used as the hydraulic fluid. The fluid pressure rises with the rotational engine speed and is used either directly or by way of a control slide valve for adjustment of the tensioning arrangement.
REFERENCES:
patent: 3888217 (1975-06-01), Hisserich
patent: 4484543 (1984-11-01), Maxey
patent: 4685429 (1987-08-01), Oyaizu
patent: 4726331 (1988-02-01), Oyaizu
patent: 4862845 (1989-09-01), Butterfield et al.
patent: 4872426 (1989-10-01), Sapienza
Fiedler Olaf
Trzmiel Alfred
Weyandt Johannes
Cross E. Rollins
Dr. Ing. h.c.F. Porsche AG
Hydraulik-Ring GmbH
Lo Weilun
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