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:
Jul. 29, 2003
Filed:
Aug. 13, 2001
Applicant:
Inventors:
Assignee:
Siemens Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M 1/500 ;
U.S. Cl.
CPC ...
G01M 1/500 ;
Abstract
Method for the testing of the exhaust gas recirculation system of an internal combustion engine that returns exhaust gas at an exhaust gas recirculation rate from the exhaust line to the intake line, in which a specific adjustment of the exhaust gas recirculation rate is set, the NOx concentration in the exhaust gas is measured and in the absence of a differential concentration varying as a function of the adjustment of the exhaust gas recirculation rate, a defect of the exhaust gas recirculation system is diagnosed.