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. 05, 2007
Filed:
May. 20, 2003
Tillmann Braun, Berglen, DE;
Tillmann Braun, Berglen, DE;
DaimlerChrysler AG, Stuttgart, DE;
Abstract
A method for monitoring a vehicle exhaust system may include (1) measuring exhaust-gas temperature at an outlet side of an exhaust pipe section which is intended to accommodate a component with a purifying activity, (2) measuring exhaust-gas temperature at an inlet side of the exhaust pipe section, and (3) comparing a time curve of the outlet-side temperature with a time curve of the inlet-side temperature, wherein the comparison comprises determining a time derivative of the outlet-side temperature or of the inlet-side temperature. Alternatively, the method may include (1) measuring exhaust-gas temperature at an outlet side of an exhaust pipe section which is intended to accommodate a component with a purifying activity, (2) determining a calculated value for the exhaust-gas temperature at the outlet side based on at least one of the heat-storing and fluid-dynamic action of the component, and (3) comparing a time curve of the measured outlet-side temperature with a time curve of the calculated value.