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:
Mar. 05, 2013
Filed:
Nov. 09, 2006
Valerie Marie Renee Houel, Royston, GB;
Raj Rao Rajaram, Slough, GB;
Athanasios Tsolakis, Bromsgrove, GB;
Valerie Marie Renee Houel, Royston, GB;
Raj Rao Rajaram, Slough, GB;
Athanasios Tsolakis, Bromsgrove, GB;
Johnson Matthey Public Limited Company, London, GB;
Abstract
The present invention relates to a method of reducing coking over a Ag/AlOhydrocarbon selective catalytic reduction catalyst in an exhaust stream of a lean burn internal combustion engine, the exhaust stream including hydrocarbon and NO. The method includes controlling the hydrocarbon to molar NOratio of the exhaust stream so as to be within certain limits at certain temperatures. An exhaust system for a lean burn engine suited to the above method, and a lean burn internal combustion engine, or a vehicle or stationary power source including such an exhaust system are also included.