Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1993-09-16
1994-11-08
Cross, E. Rollins
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123198F, F01L 134, F02D 1306
Patent
active
053617347
ABSTRACT:
In a valve control device for an engine having a fuel supply means arranged in a suction passage, a valve arranged in an intake or exhaust passage, and a cam for driving the valve to open and close via a lifter, the lifter comprises a body which slides in a bore of a cylinder head of the engine, a cylinder arranged in the body and forming a sliding passage perpendicularly to an axial direction of the valve, a spool which is transferred between a first position and a second position in the sliding passage by hydraulic pressure, a slider arranged in the spool and having a driving force transmitting portion and a cavity portion, and a spring which holds the spool at the first position, and a stop valve is arranged between the fuel supply means and the valve in the suction passage in order to close the suction passage when the spool is at the first position. When the spool is held at the second position, the driving force of the cam is transmitted to the valve only via the body and the driving force transmitting portion of the slider, and never transmitted to the spool. Thus, a stabilized change-over operation of the valve control device is achieved.
REFERENCES:
patent: 4667636 (1987-05-01), Oishi et al.
patent: 4770137 (1988-09-01), Okabe et al.
patent: 5163389 (1992-11-01), Fujikawa et al.
patent: 5247913 (1993-09-01), Manolis
Aisin Seiki Kabushiki Kaisha
Cross E. Rollins
Lo Weilun
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