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. 13, 2013
Filed:
Dec. 17, 2009
Guido Porten, Vaihingen/Enz, DE;
LU Chen, Bietigheim-Bissingen, DE;
Marc Schott, Moeglingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A device, a method, a computer program and a computer program product for diagnosing an internal combustion engine (), in which a first cylinder () includes a combustion chamber (), a fuel quantity and a fresh air quantity being supplied to the combustion chamber () for combustion; a torque contribution (D), generated by the combustion, of the first cylinder () in a first operating mode (B) of the internal combustion engine () being a function of the fresh air quantity supplied, and in a second operating mode (B) of the internal combustion engine () being essentially a function of the fuel quantity, wherein a first variable (L) characterizing a smooth running of the internal combustion engine () in the first operating mode (B) is ascertained, a second variable (L) characterizing the smooth running of the internal combustion engine () in the second operating mode is ascertained, the first variable (L) is compared to the second variable (L), a diagnosis of the internal combustion engine () is made as a function of the result of the comparison.