The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 30, 2010
Filed:
Sep. 28, 2007
Jongmin Lee, Pittsford, NY (US);
Jeffrey D. Rohe, Caledonia, NY (US);
Edward S. Suh, Rochester, NY (US);
Michael B. Knauf, Rochester, NY (US);
Jongmin Lee, Pittsford, NY (US);
Jeffrey D. Rohe, Caledonia, NY (US);
Edward S. Suh, Rochester, NY (US);
Michael B. Knauf, Rochester, NY (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
A continuously variable valve duration system including a rocker assembly acted upon by two off-spaced camshafts for selectively varying the closing point of a valve in an internal combustion engine. An opening camshaft is rotatably driven by the engine crankshaft and controls at least the opening and point of the valve through a rocker assembly disposed on a fixed pivot shaft. A closing camshaft, rotatably connected to the opening intake camshaft through a cam phaser, is poised to take over control of the valve closing event through the same rocker assembly. By changing the rotational phase of the closing camshaft relative to the opening camshaft via the cam phaser, the valve closing event can be either retarded or advanced so as to override the opening camshaft and thus selectively vary the valve event duration.