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:
Oct. 22, 2013
Filed:
Sep. 10, 2009
Joris Fokkelman, Tegernheim, DE;
Joris Fokkelman, Tegernheim, DE;
Continental Automotive GmbH, Hannover, DE;
Abstract
In a method for checking the seal of a reducing agent injector of an SCR exhaust gas aftertreatment system of an internal combustion engine comprising at least one reducing agent tank, a reducing agent pump, a reducing agent injector and an NOx sensor connected downstream from the SCR catalytic converter, the following steps are carried out: a) Generation and/or detection of a release state of the SCR system in which no reducing agent is stored in the SCR catalytic converter; b) Determining a setpoint NOx value in the exhaust gas; c) Starting the seal check with a closed reducing agent injector by increasing the reducing agent pressure; d) Detecting the NOx signal at the NOx sensor, and a) Evaluating the NOx signal.