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:
Jan. 17, 2012
Filed:
Nov. 05, 2009
Joachim Konrad, Weil der Stadt, DE;
Yi Liu, Northville, MI (US);
Emmanuel Routier, Stuttgart, DE;
Kevin Sisken, Saline, MI (US);
Patrick Wolf, Gaeufelden, DE;
Peter Schimmelpfennig, Erlangen, DE;
Joachim Konrad, Weil der Stadt, DE;
Yi Liu, Northville, MI (US);
Emmanuel Routier, Stuttgart, DE;
Kevin Sisken, Saline, MI (US);
Patrick Wolf, Gaeufelden, DE;
Peter Schimmelpfennig, Erlangen, DE;
Daimler AG, Stuttgart, DE;
Conti Temic microelectronic GmbH, Nuremberg, DE;
Abstract
In a method for the diagnostics of an internal combustion engine exhaust gas system that includes a particle filter, first and second sets of value vectors are determined, each including associated values for absolute pressure upstream and downstream of the particle filter, a differential pressure determined from the values of the absolute pressure, an exhaust gas volume flow through the particle filter, and a temperature of the exhaust gas volume flow. After a temperature-standardization of the pressure values, characteristics for dependence of the pressure values are generated from temperature-standardized values of the first set of value vectors and possibly stored as reference characteristics. By comparing temperature-standardized values for the absolute pressure on the inlet and outlet sides of the particle filter and the differential pressure of the second set of value vectors with reference characteristics, flow anomalies can be determined in the exhaust gas system.