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:
Nov. 12, 2002
Filed:
Jul. 09, 1999
Todd Howard Ballinger, Audubon, PA (US);
Christopher John Bennett, Exton, PA (US);
Barry John Cooper, Radnor, PA (US);
David Scott Lafyatis, Malvern, PA (US);
Johnson Matthey Public Limited Company, London, GB;
Abstract
Engine exhaust gas emissions are cleaned up using apparatus comprising an electrical heater, a first catalyst for oxidizing CO and H , and a hydrocarbon oxidation catalyst (which may be the same as the first catalyst). Engine management initiates electrical heating upon start-up of the engine, and ensures that there is sufficient CO and H and sufficient additional air supplied to the exhaust system, to provide chemical energy in the form of exotherm, whereby the hydrocarbon oxidation catalyst is speeded in reaching light-off temperature.