Variable intake valve
OwnerNelson A. Blish, Ronald L. Chichesterinventors
Life of this patent
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Abstract
An internal combustion engine (10) with intake valve (26) that may be kept open for a variable amount of time during the combustion cycle depending on operating conditions of the engine. Cam (22) rotates approximately 45.degree. clockwise to depress poppet (26) moving the intake valve to the open position. Cam (22) is held in the open position by lip (25) on seat (23) of the poppet valve. A step motor is used to rotate cam ( 22 ) to an open or closed position. The step motor may be deenergized while the poppet valve is in the open or shut position. In another embodiment the amount the valve is opened may be varied.
Claims7
A poppet valve operating mechanism for an internal combustion engine comprising:
- a poppet valve;
- a cam having a raised portion for depressing and opening said poppet valve;
- a holding means, on a cam follower which contacts said poppet valve, interacting with said cam to maintain said poppet valve in one of two stable positions;
- and
- a stepper motor for rotating said cam wherein said poppet valve may be maintained in at least one of an open position and a shut position without maintaining said motor energized.
Dependencies are inferred from the claim text.