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US 5,501,186 AGranted
Engine valve control mechanism
AssigneeUnisia Jecs Corporation
InventorsSeinosuke Hara, Akira Hidaka, Yoshihiko Yamada
Life of this patent
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Abstract
An engine valve control mechanism is disclosed in which the eccentricity of an intermediate member can be varied by a pivotable support and a valve lift of a cylinder valve is varied in response to the varying eccentricity such that a reduced valve lift is produced during operation with the intermediate member held eccentric with a driving shaft which drives, via the intermediate member, a cam which actuates the valve.
Claims7
An engine valve control mechanism, comprising:
- a cylinder valve;
- a driving shaft rotatable about a shaft axis;
- a cam rotatable relative to said driving shaft to actuate said cylinder valve;
- a support;
- an intermediate member supported in said support for rotation about an axis;
- a first coupling between said driving shaft and said intermediate member at a first position spaced from said shaft axis;
- a second coupling between said intermediate member and said cam at a second position angularly spaced from said first position with respect to said shaft axis,
- said first and second couplings being so spaced from said shaft axis that they are at varying distances from said axis of said intermediate member during operation, each of said first and second couplings having a movable connection to permit the variation in its distance from said axis of said intermediate member;
- means for varying an eccentricity of said intermediate member which is the relative position of said axis of said intermediate member to said shaft axis;
- and
- means responsive to the varying eccentricity of said intermediate member for varying a valve lift of said cylinder valve.
8 more elements
Dependencies are inferred from the claim text.