Apparatus for controlling inlet of exhaust valves

Details Apparatus for controlling inlet of exhaust valves Apparatus for controlling inlet of exhaust valves

1989-09-05

1990-09-18

Dolinar, Andrew M.

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

251 3001, 251 33, F01L 100

Patent

active

049570757

ABSTRACT:
A hydraulic system for controlling the operation of the intake or exhaust valves of an internal combustion engine. For each valve there is a sealed hydraulic chamber with one plunger driven by a rotating cam to a camshaft and another plunger for actuating the valve. A single solenoid valve is connected by a separate passage having a check valve to each of a plurality of hydraulic chambers. The single solenoid valve can be opened during the actuation of any one of the valves to cause rapid closing of the valve by draining the hydraulic oil from the hydraulic chamber without causing premature actuation of another valve or effecting the subsequent operation of other valves after closing of the single solenoid valve.

REFERENCES:
patent: 873822 (1907-12-01), Wolfe
patent: 2543652 (1951-02-01), Weymouth
patent: 3188047 (1965-06-01), Criffield
patent: 4462566 (1984-07-01), French
patent: 4615306 (1986-10-01), Wakeman

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