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:
Jul. 24, 2001
Filed:
Jun. 13, 2000
Roger T. Simpson, Ithaca, NY (US);
Frank R. Smith, Cortland, NY (US);
BorgWarner Inc., Troy, MI (US);
Abstract
An internal combustion engine includes a camshaft (,) and hub (,) secured to the camshaft (,) for rotation therewith, where a housing (,) circumscribes the hub (,) and is rotatable with the hub (,) and the camshaft (,), and is further oscillatable with respect to the hub (,) and camshaft (,). Driving vanes (,) are radially inwardly disposed in the housing (,) and cooperate with the hub (,), while driven vanes (,) are radially outwardly disposed in the hub (,) to cooperate with the housing (,) and also circumferentially alternate with the driving vanes (,) to define circumferentially alternating advance and retard chambers (,A/,R). A configuration for controlling the oscillation of the housing (,)relative to the hub (,) includes an electronic engine control unit (,), and an advancing control valve (,) that is responsive to the electronic engine control unit (,)and that regulates engine oil pressure to and from the advance chambers(,A). A retarding control valve (,) responsive to the electronic engine control unit (,) regulates engine oil pressure to and from the retard chambers (,R). An advancing passage (,) communicates engine oil pressure between the advancing control valve (,) and the advance chambers (,A), while a retarding passage (,) communicates engine oil pressure between the retarding control valve (,) and the retard chambers(,R).