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:
Jan. 15, 2008
Filed:
Mar. 15, 2006
Christopher J. Pluta, Ithaca, NY (US);
Roger P. Butterfield, Trumansburg, NY (US);
Christopher J. Pluta, Ithaca, NY (US);
Roger P. Butterfield, Trumansburg, NY (US);
BorgWarner Inc., Auburn Hills, MI (US);
Abstract
A variable cam timing phaser including a housing, a rotor coaxially located within the housing, a phase control valve, a switching valve, and a passage connecting the first advance and retard chambers. The housing and the rotor define at least two chambers, a first chamber separated by a first vane into the first advance and retard chambers, and a second chamber separated by a second vane into the second advance and retard chambers. The switching valve has a first position in which fluid may flow freely between the passage connecting the first advance and retard chambers and fluid flow from the phase control valve to the first advance and first retard chambers is blocked. In the second position, the passage connecting the first advance and retard chambers is blocked and fluid may flow freely between the phase control valve and the first advance and first retard chambers.