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:
Jun. 27, 2006
Filed:
Nov. 15, 2004
Torsten Keller, Bobenthal, DE;
Sinan Yilman, Pluederhausen, DE;
Boris Koehler, Vaihingen/Enz, DE;
Christian Schuler, Bietigheim-Bissingen, DE;
Torsten Keller, Bobenthal, DE;
Sinan Yilman, Pluederhausen, DE;
Boris Koehler, Vaihingen/Enz, DE;
Christian Schuler, Bietigheim-Bissingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method for operating an internal combustion engine, in which an erroneous lift of an intake valve of a cylinder is directly determined. The lift of an intake valve of at least one cylinder of the internal combustion engine is diagnosed. A value for a specific cylinder which is representative of the air/fuel ratio in the respective cylinder is determined in an exhaust system branch of the internal combustion engine. At least one such value is compared to a predefined value. An erroneous lift of the intake valve is diagnosed as a function of the deviation of this at least one value from the predefined value.