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. 06, 2006
Filed:
Aug. 31, 2002
Tilman Wolfram Beutel, Neshanic Station, NJ (US);
John Lawrence Calabrese, Summit, NJ (US);
Tilman Wolfram Beutel, Neshanic Station, NJ (US);
John Lawrence Calabrese, Summit, NJ (US);
Engelhard Corporation, Iselin, NJ (US);
Abstract
An NOx emission system for diesel powered vehicles has a 'Y' exhaust system with an NOx adsorber catalyst in each leg and an oxidation catalyst in the combined leg. One bank of cylinders sends exhaust gases to one of the 'Y' legs while a second bank of cylinders send exhaust gases to the other “Y” leg. Composition of the exhaust gases in each leg is independently controlled by the engine's ECU so that exhaust gases in one leg are rich for regenerating the NOx adsorber catalyst in that leg while exhaust gas composition in the other leg is lean so that the combined gas stream is always lean and reductant slip is oxidized in the oxidation catalyst.