Ford Global Technolgoies, LLC

Yisun Cheng

Giovanni Cavataio

Haren S Gandhi

Robert Henry Hammerle

John Vito Cavataio

Christine Kay Lambert

Carolyn Parks Hubbard

Michael James Uhrich

Eva Thanasiu

Karen Marie Adams

Yinyan Huang

Andrew Gregory Getsoian

Jason Wu

Natalie Roxas

Jeffrey Scott Hepburn

Douglas Allen Dobson

Clifford Norman Montreuil

Mira Bumbaroska

A catalytic converter system having oxygen storage materials is disclosed and methods for determining whether to reactivate oxygen storage materials and monitoring failure events of the oxygen storage materials are also disclosed.

Accelerated catalyst reactivation control strategy for gasoline vehicle emissions system in conjunction with N2 selective catalyst to minimize NOX remake

An automotive catalytic converter includes a three-way catalyst having Rh as the only precious metal configured as a front zone and a three-way catalyst having a mixture of Rh and Pd, Pt, or both configured as a rear zone, such that an exhaust gas from an internal combustion engine passes through the front zone before passing through the rear zone to minimize sulfur poisoning of the catalytic converter.

Catalyst for automotive emissions control

This catalyst system simultaneously removes ammonia and enhances net NOx conversion by placing an NH-SCR catalyst formulation downstream of a lean NOx trap. By doing so, the NH-SCR catalyst adsorbs the ammonia from the upstream lean NOx trap generated during the rich pulses. The stored ammonia then reacts with the NOx emitted from the upstream lean NOx trap-enhancing the net NOx conversion rate significantly, while depleting the stored ammonia. By combining the lean NOx trap with the NH-SCR catalyst, the system allows for the reduction or elimination of NHand NOx slip, reduction in NOx spikes and thus an improved net NOx conversion during lean and rich operation.

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A method for controlling emissions from an engine includes reducing trapped nitrogen oxides to ammonia on an LNT catalyst while concurrently oxidizing soot accumulated on the LNT catalyst, and, flowing the ammonia so formed to an SCR catalyst.

Reduction of particulate, NOx, and ammonia emissions

According to at least one aspect of the present invention, a urea-resistant catalytic unit is provided. In at least one embodiment, the catalytic unit includes a catalyst having a catalyst surface, and a urea-resistant coating in contact with at least a portion of the catalyst surface, wherein the urea-resistant coating effectively reduces urea-induced deactivation of the catalyst. In at least another embodiment, the urea-resistant coating includes at least one oxide from the group consisting of titanium oxide, tungsten oxide, zirconium oxide, molybdenum oxide, aluminum oxide, silicon dioxide, sulfur oxide, niobium oxide, molybdenum oxide, yttrium oxide, nickel oxide, cobalt oxide, and combinations thereof.

Urea-resistant catalytic units and methods of using the same

This catalyst system simultaneously removes ammonia and enhances net NO, conversion by placing an NH-SCR catalyst formulation downstream of a lean NOtrap. By doing so, the NH-SCR catalyst adsorbs the ammonia from the upstream lean NOtrap generated during the rich pulses. The stored ammonia then reacts with the NOemitted from the upstream lean NOtrap&#x2014;enhancing the net NOconversion rate significantly, while depleting the stored ammonia. By combining the lean NOtrap with the NH-SCR catalyst, the system allows for the reduction or elimination of NHand NOslip, reduction in NOspikes and thus an improved net NOconversion during lean and rich operation.

An exemplary emission treatment system for reducing gases from the exhaust of an engine includes an exhaust passage for transporting the exhaust from the engine. A selective catalytic reduction (SCR) catalyst is disposed within the passage, and an oxidation catalyst is disposed in the passage upstream of the SCR catalyst. The oxidation catalyst has noble metal, with at least 90 wt. % of the metal comprising palladium (Pd).

This catalyst system simultaneously removes ammonia and enhances net NOx conversion by placing an NH&#x2014;SCR catalyst formulation downstream of a lean NOx trap. By doing so, the NH&#x2014;SCR catalyst adsorbs the ammonia from the upstream lean NOx trap generated during the rich pulses. The stored ammonia then reacts with the NOx emitted from the upstream lean NOx trap-enhancing the net NOx conversion rate significantly, while depleting the stored ammonia. By combining the lean NOx trap with the NH&#x2014;SCR catalyst, the system allows for the reduction or elimination of NHand NOx slip, reduction in NOx spikes and thus an improved net NOx conversion during lean and rich operation.

This catalyst system simultaneously removes ammonia and enhances net NOconversion by placing an NH&#x2014;SCR catalyst formulation downstream of a lean NOtrap. By doing so, the NH&#x2014;SCR catalyst adsorbs the ammonia from the upstream lean NOtrap generated during the rich pulses. The stored ammonia then reacts with the NOemitted from the upstream lean NOtrap&#x2014;enhancing the net NOconversion rate significantly, while depleting the stored ammonia. By combining the lean NOtrap with the NH&#x2014;SCR catalyst, the system allows for the reduction or elimination of NHand NOslip, reduction in NOspikes and thus an improved net NOconversion during lean and rich operation.

This catalyst system simultaneously removes ammonia and enhances net NOx conversion by placing an NH-SCR catalyst formulation downstream of a lean NOx trap. By doing so, the NH-SCR catalyst adsorbs the ammonia from the upstream lean NOx trap generated during the rich pulses. The stored ammonia then reacts with the NOx emitted from the upstream lean NOx trap&#x2014;enhancing the net NOx conversion rate significantly, while depleting the stored ammonia. By combining the lean NOx trap with the NH-SCR catalyst, the system allows for the reduction or elimination of NHand NOx slip, reduction in NOx spikes and thus an improved net NOx conversion during lean and rich operation.

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Ann Arbor, MI, United States of America

Yisun Cheng