Hydraulically actuated valve system

Details Hydraulically actuated valve system Hydraulically actuated valve system

1994-08-04

1996-07-02

Dolinar, Andrew M.

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

123 9015, 123 9022, 123 9049, F01L 902

Patent

active

055311920

ABSTRACT:
The design and construction of current electronically-controlled hydraulically-actuated engine valve systems are currently still being tested for dependability. The electronics control various activities including actuation velocity and, therefore, can include complicated components. The present invention overcomes this and other problems by providing a valve actuation system including an electronically-controlled hydraulically-actuated plunger for actuating an engine valve. Hydraulic means are utilized for reducing the plunger velocity thereby controlling the valve lift and the valve seating as the valve approaches the open and closed positions. The hydraulic means reduces the need for a complicated electronic control unit, therefore, improving the feasibility and dependability of the present invention.

REFERENCES:
patent: 4930464 (1990-06-01), Letsche
patent: 5255641 (1993-10-01), Schechter
patent: 5275136 (1994-01-01), Schechter et al.
U.S. patent application, application No. 08/092,373, filed Jul. 15, 1993, "Recuperative Engine Valve System and Method of Operation", J. R. Weber.
U.S. patent application, application No. 08/244,338, filed Nov. 29, 1991, "Engine Valve Seating Velocity Hydraulic Snubber", J. R. Weber.

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