Hydraulic valve actuator for reciprocating engine

Details Hydraulic valve actuator for reciprocating engine Hydraulic valve actuator for reciprocating engine

2007-01-16

2007-01-16

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

C123S090130, C123S090110, C251S012000, C251S129010

Reexamination Certificate

active

10521739

ABSTRACT:
A hydraulic valve actuator for reciprocating engine includes at least a hydraulic cylinder (3) for opening at least one valve (2) via at least one valve opening selector (11) with at least one hydraulic positive displacement pump (4) whereof the hydraulic fluid supplied at the output can be forced into a high pressure circuit (10) by at least one pump outlet closure (8), the valve (2) capable of being maintained opened by an opening non-return valve (24), then of being reseated by a valve closing selector (25) which directs the hydraulic fluid contained in the hydraulic cylinder (3) in the hydraulic positive displacement pump (4) input by co-operating with a pump input non-return valve (26).

REFERENCES:
patent: 4531706 (1985-07-01), Weiger et al.
patent: 5255641 (1993-10-01), Schechter
patent: 5713331 (1998-02-01), Eisenbacher et al.
patent: 6857403 (2005-02-01), Diehl et al.
patent: 42 32 573 (1993-04-01), None

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