Valve drive device

Details Valve drive device Valve drive device

1994-01-21

1994-11-15

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

123 9013, 123 9015, F01L 902

Patent

active

053638166

ABSTRACT:
A hydraulic valve drive device for intake/exhaust valves of an internal combustion engine using an oil pump similar to a distributor type injection pump. A plunger rotates and engages in reciprocating motion to pressurize hydraulic fluid taken into a pressure chamber and opens to discharge the same into a hydraulic cylinder of a specific intake/exhaust valve in register with the passage. The intake/exhaust valve maintains its valve lift to continue remaining open when the supply of the hydraulic fluid is stopped, but closes when the plunger rotates so that the passage is communicated with a relief channel and the relief valve opens.

REFERENCES:
patent: 3361121 (1968-01-01), Schott
patent: 4174687 (1979-11-01), Fuhrmann
patent: 4821689 (1989-04-01), Tittizer et al.
patent: 4898129 (1990-02-01), Junghans
patent: 5197419 (1993-03-01), Dingess
patent: 5209453 (1993-05-01), Aota et al.

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