Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1978-06-14
1980-05-20
Lazarus, Ira S.
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9017, 123 9027, 123198F, F01L 134, F02D 1306
Patent
active
042033977
ABSTRACT:
An engine valve control mechanism for varying the amount of opening and/or timing of a cylinder valve in a valve gear train of a multi-cylinder, internal combustion engine having an overhead camshaft which actuates the valve via a rocker arm pivotally bridged between the valve stem and a hydraulic lash adjuster. In one engine embodiment of the invention, the valve gear train portion for each intake valve is provided with a valve control mechanism of the invention by providing a camshaft having a high lift lobe and two low lift lobes for actuating the valve and by providing a valve rocker arm including a rigid link defining a first cam follower for following the low lift lobes and a second cam follower pivotally connected to the rigid link for following the high lift lobe. A latch, carried by the rigid link, is operative in a first position to prevent pivotal movement of the second follower relative to the rigid link, whereby the valve is actuated by the high lift lobe, and operative in a second position to allow such pivotal movement, whereby the valve is actuated by the low lift lobes. The latch is operated by a solenoid supported by the lash adjuster. In a second embodiment of the invention, the low lift lobes are removed, whereby the valves are disabled when the latch is in the second position.
REFERENCES:
patent: 2266077 (1941-12-01), Roan
patent: 2443999 (1948-06-01), Wright
patent: 2934052 (1966-04-01), Longenecker
patent: 3277874 (1966-10-01), Wagner
patent: 3422803 (1969-01-01), Stivender
patent: 3641988 (1972-02-01), Torazza et al.
patent: 3964455 (1976-06-01), Brown
patent: 4151817 (1979-05-01), Muellen
Eaton Corporation
Lazarus Ira S.
McCloskey R. J.
Rulon P.
Wood D.
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