Variable valve timing arrangement with automatic valve clearance

Details Variable valve timing arrangement with automatic valve clearance Variable valve timing arrangement with automatic valve clearance

1982-03-09

1984-03-27

Lazarus, Ira S.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9027, 123 9046, F01L 134

Patent

active

044387369

ABSTRACT:
A variable valve timing system has a lever pivoted at one end on a piston reciprocally disposed in a cylinder and the other end in engagement with a poppet valve. A first cam cooperates with a second bell crank lever like cam which is eccentrically mounted on a rotatable shaft. Rotation of this shaft moves the second cam toward or away from the engine proper to vary the movement of the lever with which the second cam cooperates. The piston is biased out of the cylinder by a spring and maintained in position by hydraulic fluid introduced into the cylinder through a one way flow arrangement.

REFERENCES:
patent: 3413965 (1968-12-01), Gavasso
patent: 3618574 (1971-11-01), Miller
patent: 4151817 (1979-05-01), Mueller
patent: 4205634 (1980-06-01), Tourtelot, Jr.
patent: 4285310 (1981-08-01), Takizawa et al.

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