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:
Oct. 29, 2002
Filed:
Feb. 22, 2000
Michiel Jacques van Nieuwstadt, Ann Arbor, MI (US);
Ching-Hsong George Wu, Farmington Hills, MI (US);
Ford Global Technologies, Inc., Dearborn, MI (US);
Abstract
A method is disclosed for controlling the delivery of compressed air and a reductant for oxides of nitrogen to a mixer from which the air/reductant mixture flows through a nozzle and into an exhaust gas created by a combustion engine. A control signal provided to an air compressor is varied as the exhaust gas pressure changes to maintain a predetermined differential pressure across the nozzle. The desired flow rate of reductant into the exhaust gas is calculated based upon the engine speed, engine load, catalyst temperature, and gas space velocity flowing through the catalyst. A reductant control signal, based upon the calculated reductant flow rate, is provided to a metering pump that delivers the reductant into the mixer. Calculations of the reductant control signal take into account the air pressure that the reductant pump sees inside the mixer.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile