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. 26, 2021
Filed:
May. 30, 2019
Toyota Motor Engineering & Manufacturing North America, Inc., Plano, TX (US);
Torin C. Peck, Ann Arbor, MI (US);
Krishna Gunugunuri, Canton, MI (US);
Charles Alexander Roberts, Farmington Hills, MI (US);
Toyota Motor Engineering & Manufacturing North America, Inc., Plano, TX (US);
Abstract
Passive NOadsorption (PNA) compositions have a formula Pd—NiFeOwherein Pd represents a palladium component, such as palladium oxide, that is adsorbed on surfaces of the nickel ferrite. Such compositions can be synthesized by wet impregnation of nickel ferrite with a palladium salt, and exhibit efficient NOadsorption at low temperature, with NOdesorption occurring predominantly at high temperature. Two-stage NOabatement catalysts, effective under engine cold start conditions, include a PNA composition upstream from an NOconversion catalyst.