Internal-combustion engines – Poppet valve operating mechanism – Hydraulic system
Patent
1989-02-17
1989-12-26
Wolfe, Willis R.
Internal-combustion engines
Poppet valve operating mechanism
Hydraulic system
123 9016, F01L 112, F01L 124, F02D 1302
Patent
active
048890847
ABSTRACT:
A hydraulic valve control device for internal combustion engines having a magnetic valve for controlling the opening and closing time of an inlet or outlet valve in which the fluid pressed out of the stroke transmission chamber by the engine valve springs is stored in a reservoir chamber integrated with the magnetic valve; the reservoir chamber, by displacing the valve member backward, functions as a reservoir piston in the opening direction. A spring acting upon the valve member in the closing direction of the magnetic valve presses the fluid back into the stroke transmission chamber, which now is expanding one again. The magnetic valve communicates with the stroke transmission chamber through the shortest possible fluid conduit.
REFERENCES:
patent: 4278233 (1981-07-01), Zurner et al.
patent: 4466390 (1984-08-01), Babitzka et al.
patent: 4671221 (1987-06-01), Geringer et al.
patent: 4674451 (1987-06-01), Rembold et al.
patent: 4696265 (1987-09-01), Nohira
patent: 4765288 (1988-08-01), Linder et al.
Greigg Edwin E.
Lo Weilun
Robert & Bosch GmbH
Wolfe Willis R.
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