Variable intake valve

Details Variable intake valve Variable intake valve

1993-06-01

1994-07-26

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

Electrical system

123 9016, 123 9017, 123 9031, F01L 104

Patent

active

053319311

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.

REFERENCES:
patent: 4870930 (1989-10-01), Yagi
patent: 4917056 (1990-04-01), Yagi et al.
patent: 5140955 (1992-08-01), Sono et al.
patent: 5161494 (1992-11-01), Brown, Jr.

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