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:
Dec. 25, 2001
Filed:
Jun. 29, 1999
Applicant:
Inventors:
Hartmut Voss, Wimsheim, DE;
Joachin Grunberger, Sachsenheim, DE;
Assignee:
Dr. Ing. h.c.F. Porsche AG, Weissach, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01L 1/300 ;
U.S. Cl.
CPC ...
F01L 1/300 ;
Abstract
An engine is operated with two groups of cylinders, one of which groups is constantly powered and a second of said groups is selectively operated by cutting it in and out. The second group of cylinders is cut in and out by switching the valve lift of the associated charge-changing valves. The valve lift of the constantly operated cylinder group is also independently variable so that in both operating states of the second cylinder group, consumption-optimized valve lifts can be set for the first cylinder group.