Internal-combustion engines – Poppet valve operating mechanism – Hydraulic system
Patent
1996-12-16
2000-05-30
Michalsky, Gerald A.
Internal-combustion engines
Poppet valve operating mechanism
Hydraulic system
137 1, 251 3001, 251 636, F16K 31122
Patent
active
060679468
ABSTRACT:
A system and a method for hydraulic actuation of poppet valves. The poppet valve is opened by application of hydraulic pressure to a piston, and is closed by action of a mechanical spring. Hydraulic pressure comes from either a high pressure source of a low pressure source, the low pressure source being higher than ambient pressure. Application of hydraulic pressure is made by a pressure control device based upon signals received from an electronic controller. Hydraulic pressure is applied in a way that minimizes the power required to actuate the valve by making use of valve inertia.
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Bunker Byron J.
Ghuman Amarjit S.
Janssen John M.
Radovanovic Rod
Cummins Engine Company, Inc.
Michalsky Gerald A.
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