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. 21, 1999
Filed:
Jul. 10, 1997
Applicant:
Inventor:
Dietmar Schwarzenthal, Ditzingen, DE;
Assignee:
Dr. Ing h.c.F. Porsche AG, Weissach, DE;
Primary Examiner:
Int. Cl.
CPC ...
G06G / ;
U.S. Cl.
CPC ...
701102 ; 701 29 ;
Abstract
The invention relates to a method and a device for monitoring the position of a variable valve control. In order to monitor the position of a variable valve control in which the construction expense is reduced, it is proposed to perform a cylinder-specific analysis of the nonuniformity of the rotational speed of the crankshaft and from this to determine the operating state of the valve control, possibly for each cylinder individually.