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. 16, 2015
Filed:
Sep. 28, 2010
Andreas Eckert, Renningen-Malmsheim, DE;
Herbert Schoemig, Stuttgart, DE;
Tobias Pfister, Stuttgart, DE;
Andreas Eckert, Renningen-Malmsheim, DE;
Herbert Schoemig, Stuttgart, DE;
Tobias Pfister, Stuttgart, DE;
ROBERT BOSCH GMBH, Stuttgart, DE;
Abstract
The present invention relates to a method for operating an exhaust gas aftertreatment apparatus () of an internal combustion engine (), which comprises an oxidation catalytic converter (), an SCR catalytic converter () and a first temperature sensor () disposed in the direction of flow downstream of the oxidation catalytic converter () and upstream of the SCR catalytic converter (), an exhaust gas atmosphere capable of exothermal reaction in said oxidation catalytic converter () being generated by the metering of hydrocarbons into the exhaust gas () upstream of said oxidation catalytic converter () during a heating operation. The method is thereby characterized in that a first numerical measurement value of a nominal value of a hydrocarbon conversion in said oxidation catalytic converter () is formed, in that a second numerical measurement value of an actual value of the hydrocarbon conversion in said oxidation catalytic converter () is determined as a function of the signals of the first temperature sensor (), in that the second numerical measurement value is compared with the first numerical measurement value and in that the metering of the hydrocarbons is reduced if said second numerical measurement value is smaller than said first numerical measurement value. An independent claim relates to a control device set up for carrying out the method.