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:
Feb. 23, 2010
Filed:
Jan. 10, 2006
Andreas Pfaeffle, Wuestenrot, DE;
Johannes Schaller, Vaihingen An Der Enz, DE;
Wolfram Veigel, Hessigheim, DE;
Cord Scharsack, Weil Im Schönbuch, DE;
Rudi Drefs, Friolzheim, DE;
Viktor Pauli, Stuttgart, DE;
Thomas Eh Walter, Karlsruhe, DE;
Andreas Pfaeffle, Wuestenrot, DE;
Johannes Schaller, Vaihingen An Der Enz, DE;
Wolfram Veigel, Hessigheim, DE;
Cord Scharsack, Weil Im Schönbuch, DE;
Rudi Drefs, Friolzheim, DE;
Viktor Pauli, Stuttgart, DE;
Thomas Eh Walter, Karlsruhe, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method is provided for operating an internal combustion engine in whose exhaust-gas region an exhaust-gas treatment device is situated, and in which a reagent is introduced into the exhaust-gas region of the internal combustion engine. in addition, a device is provided for implementing the method. The reagent pressure occurring between a reagent safety valve and a reagent dosing valve, disposed directly in the exhaust-gas region is recorded during different states of the reagent safety valve and/or the reagent dosing valve and compared to at least one threshold value. If the threshold is exceeded, a fault signal is provided. This may offer high safety which may be of particular importance when fuel is used as reagent.