Method and apparatus for setting valve lift within a cylinder
AssigneeDelphi Technologies, Inc.
InventorRonald J. Pierik
Life of this patent
Estimating the term…
Abstract
A variable valve actuating (VVA) mechanism includes a frame member and a rocker. The rocker includes a first end and a second end, with the first end being pivotally coupled to the frame. A link includes a first end and a second end. A first pin pivotally couples the first end of the link to the second end of the rocker. A second pin pivotally couples an output cam to the second end of the link. At least one of the first and second pins is an eccentric pin.
Claims19
A variable valve actuating (VVA) mechanism, comprising:
- a frame member configured for being pivoted relative to a central axis that is at least one of substantially parallel relative to and coaxial with a central axis of an input shaft;
- a rocker having a first end and a second end, said first end pivotally coupled to said frame;
- a link having a first end and a second end;
- a first pin pivotally coupling said first end of said link to said second end of said rocker;
- an output cam;
- a second pin pivotally coupling said output cam to said second end of said link;
- wherein at least one of said first and second pins is an eccentric pin.
A method for setting the lift of a first valve relative to a second valve of an engine cylinder, at least said first valve being actuated by a variable valve actuating (VVA) mechanism, said method comprising:
- ascertaining the maximum lift of the second valve;
- determining the maximum lift of the first valve;
- and
- pivoting an eccentric pin of the VVA mechanism to thereby pivot an output cam thereof from a base angular orientation to an adjusted base angular orientation, thereby one of increasing and decreasing the lift imparted to the first valve by the VVA mechanism.
An internal combustion engine, said engine having at least one cylinder, at least four valves operably associated with said cylinder, said engine comprising:
- a variable valve actuating mechanism actuating at least one of said valves, said variable valve mechanism including:
- a frame member configured for being pivoted relative to a central axis that is one of substantially parallel relative to and coaxial with a central axis of a camshaft of said engine;
- a rocker having a first end and a second end, said first end pivotally coupled to said frame;
- a link having a first end and a second end;
- a first pin pivotally coupling said first end of said link to said second end of said rocker;
- an output cam;
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- a second pin pivotally coupling said output cam to said second end of said link;
- wherein at least one of said first and second pins is an eccentric pin.
Dependencies are inferred from the claim text.