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. 23, 2015
Filed:
Jul. 12, 2012
James W. Girard, Vienna, AT;
Giovanni Cavataio, Dearborn, MI (US);
Christine Kay Lambert, Dearborn, MI (US);
Rachel Alison Snow, Belleville, MI (US);
James W. Girard, Vienna, AT;
Giovanni Cavataio, Dearborn, MI (US);
Christine Kay Lambert, Dearborn, MI (US);
Rachel Alison Snow, Belleville, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A system and method for NOx reduction is described, with a catalytic unit including a first zeolite catalyst with a first NOx conversion performance in a first temperature range and a second NOx conversion performance, lower than said first NOx conversion performance, in a second temperature range. The catalytic unit also comprises a second zeolite catalyst with a third NOx conversion performance, lower than said first NOx conversion performance, in the first temperature range and a fourth NOx conversion performance, higher than said second and third NOx conversion performances in the second temperature range, said first temperature range being higher than said second temperature range. The system further includes a controller configured to adjust an amount of reducing agent added to the NOx reducing system responsive to a temperature of the catalytic unit.