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:
Aug. 09, 1988
Filed:
Dec. 29, 1986
Applicant:
Inventor:
Steven F Baker, Bellevue, OH (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01L / ;
U.S. Cl.
CPC ...
123 9031 ; 123 9017 ;
Abstract
An internal combustion engine, or the like, includes a camshaft drive providing hydraulically variable cam timing utilizing computer control of a hydraulic dump and fill coupling which varies the retardation of a spring driven member connected with the camshaft. The camshaft phase relation is read by the computer and adjusted in relation to engine speed according to a preprogrammed phase relationship.