Internal combustion engine valve lift and cam duration control s

Details Internal combustion engine valve lift and cam duration control s Internal combustion engine valve lift and cam duration control s

1986-01-26

1987-02-17

Lazarus, Ira S.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9043, 123 9044, F01L 118

Patent

active

046431411

ABSTRACT:
A mechanism for varying the lift, timing and duration of a valve member associated with an internal combustion engine comprising an elongated rocker arm having a first pivot end and a second end forming a valve member actuating free end, a pair of eccentric members forming a first eccentric member and a second eccentric member collectively defining a pivot axis within a circular opening for the rocker arm, the first eccentric member comprising a shaft having cylindrical end portions journaled for rotation about a shaft axis and an eccentric cylindrical portion located within the opening of the rocker arm, and the second eccentric member comprising a tubular sleeve rotatably supported on the surface of the shaft and concentric with a second eccentric axis spaced from the shaft axis, the second eccentric member rotating relative to the first eccentric member to provide a pivot axis for the rocker arm which is formed by the collective angular position of the first and second eccentric members.

REFERENCES:
patent: 1234855 (1917-07-01), Barthel
patent: 1936653 (1933-11-01), Almen
patent: 2260983 (1941-10-01), Walker
patent: 2266077 (1941-12-01), Roan
patent: 2412457 (1946-12-01), Harrison
patent: 2698611 (1955-01-01), Knudsen
patent: 2772667 (1956-12-01), Nallinger
patent: 2997991 (1961-08-01), Roan
patent: 3367312 (1968-02-01), Jonsson
patent: 3413965 (1968-12-01), Gauasso
patent: 3641988 (1972-02-01), Tarazza et al.

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