Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1986-06-30
1988-02-09
Myhre, Charles J.
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9017, 123 9025, 123 9034, 123 9045, F01L 134
Patent
active
047235152
ABSTRACT:
The operating mechanism for opening and closing the valve of an internal combustion engine includes a single generally L-shaped rocker arm having a vertical leg formed with a cam follower surface that is engaged by a cam unit mounted on the engine's camshaft. The rocker arm also includes a horizontal leg having an adjustable eccentric device carried at its free end that is engageable with the upper end of the valve member for determining the amount of valve lash. The rocker arm is mounted on a shiftable axis provided by a lever arm, one end of the lever arm being pivotal about a fixed axis. The vertical leg of the rocker arm is raised and lowered so as to present various follower portions on the vertical leg to the cam unit as it rotates. The cam unit includes a pair of flanking cams, both of which may have identical profiles or profiles that differ from each other in order to achieve desired valve opening and closing patterns. At least one flanking cam has ramp portions which are angularly oriented with other ramp portions associated with the lobe on the central cam assigned the primary responsibility of opening and closing the valve.
REFERENCES:
patent: 2410660 (1946-11-01), Howard
patent: 2791206 (1957-05-01), Engemann
patent: 2880712 (1959-04-01), Roan
patent: 4261307 (1981-04-01), Oldberg
patent: 4469056 (1984-09-01), Tourtelot, Jr. et al.
Investment Rarities Incorporated
Myhre Charles J.
Neils Peggy A.
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