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:
Sep. 30, 2003
Filed:
Feb. 28, 2001
Roland Stahl, Freiberg, DE;
Rainer Strohmaier, Stuttgart, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A device and a method for detecting ammonia, especially for detecting an NH slip emission in a catalytic converter arrangement, a gas, especially an exhaust gas of a lean-mixture-driven internal combustion engine, being supplied to an SCR catalytic converter via a first gas supply device, and ammonia being supplied via a second gas supply device. The device includes a first arrangement, especially an oxidation catalytic converter, which prior to the supplying of the gas to the SCR catalytic converter, initially at least substantially oxidizes the oxidizable gas components contained in the gas. Emerging gas from the SCR catalytic converter is analyzed by a second arrangement, especially a gas sensor, with respect to the oxidizable components contained in it. The gas sensor may detect oxidizable gas components, including in a non-selective manner, and is connected via a processing unit and a control unit to a dosing system, which regulates the supply of ammonia.