Ford Motor Company Limited

Ford Global Technolgoies, LLC

Haren S Gandhi

William L Watkins

Mohinder S Chattha

Mordecai Shelef

Robert Henry Hammerle

Yisun Cheng

John Vito Cavataio

Henryk K Stepien

Hung-Wen Jen

Joseph T Kummer

Jun (John) Li

Clifford N Montreuil

Ronald Gene Hurley

Karen M Adams

Hsien C Yao

Jeffrey Scott Hepburn

Robert Walter McCabe

Douglas Allen Dobson

Eva Thanasiu

George Wade Graham

Carolyn Parks Hubbard

James E Riley

Thomas E Bazil

Eugene C Su

Hans P Creutz

William R Adam

Chaitanya Kumar Narula

Joseph Robert Theis

Albert Nazipovich Chigapov

William Lewis Henderson Watkins

Thomas J Korniski

Andrew Anthony Adamczyk, Jr

Albert Nazipovich Shigapov

Scott Christopher Williams

Hsin C Yao

Paul P Wynblatt

Mario G Meneghel

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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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.

A catalyst system for use with an internal combustion engine to provide emissions reductions under lean and stoichiometric operating conditions. The catalyst system comprises a first catalyst comprised of a newly developed Perovskite-based formulation having an ABOcrystal structure designed to bring the precious metal and NOx trapping elements close together. The first catalyst acts primarily to maximize the reduction of emissions under lean operating conditions. The catalyst system also comprises a second catalyst comprised of precious metals which acts primarily to maximize the reduction of emissions under stoichiometric conditions.

Perovskite catalyst system for lean burn engines

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.

A catalyst system to provide emission reductions under lean and stoichiometric conditions. The catalyst system comprises a forward catalyst having a first cerium-free zone including oxides of aluminum, alkali metals and alkaline earth metals and precious metals and a second zone with a lower loading of precious metals, oxides of aluminum, alkali metals or alkaline earth metals. This forward catalyst stores NOx emissions under lean conditions for subsequent reduction and converts HC, CO and NOx during stoichiometric operation. The second downstream catalyst includes precious metals, reduces emissions under stoichiometric conditions, and stores any residual NOx emitted from the first catalyst for subsequent reduction. In another embodiment, a forward catalyst has top and bottom layers designed to reduce emissions under lean conditions. In this embodiment, a second downstream catalyst is used to reduce emissions under stoichiometric conditions. In yet another catalyst, multiple zones are created within a single catalyst.

Catalyst system for lean burn engines

The present invention involves an exhaust gas catalyst and method of manufacturing same. The invention provides for a cost-effective material which lowers the cold-start emissions from the exhaust of vehicles. The invention is a passive system which accelerates the light-off temperature of catalyst in a cost-effective fashion. The invention includes a method of manufacturing an exhaust gas catalyst capable of lowering cold-start emissions including the steps of providing an oxide mixture having praseodymium and cerium, doping about 0&#x2013;10% weight zirconium and about 0&#x2013;10% weight yttrium to the oxide mixture, adding about 0&#x2013;2% weight metal including palladium, platinum, or rhodium to the oxide mixture, mixing gamma aluminum to the oxide mixture for washcoating and washcoating the oxide mixture onto a monolithic substrate.

Exhaust gas catalyst and method of manufacturing same

An exhaust gas catalyst and method of manufacturing same. The invention provides for a cost-effective material which lowers the cold-start emissions from the exhaust of vehicles. The invention is a passive system which accelerates the light-off temperature of catalyst in a cost-effective fashion. The invention includes a method of manufacturing an exhaust gas catalyst capable of lowering cold-start emissions including the steps of providing an oxide mixture having praseodymium and cerium, doping about 0-10% weight zirconium and about 0-10% weight yttrium to the oxide mixture, adding about 0-2% weight metal including palladium, platinum, or rhodium to the oxide mixture, mixing gamma aluminum to the oxide mixture for washcoating and washcoating the oxide mixture onto a monolithic substrate.

A lean-NO,catalyst having a sol-gel processed membrane. The sol-gel processed membrane is loaded with a transition metal. Methods are also disclosed for loading a transition metal on the membrane and reducing emissions in an exhaust stream to provide a NO,reduction system which can operate in a broad range of operating conditions.

Sol-gel alumina membrane for lean NOx catalysts and method of making same

A catalytic converter having a first highly loaded palladium or trimetal catalytic element containing palladium of relatively large particle size closely coupled to the engine exhaust manifold, followed by one or more second catalytic elements having high oxygen storage capacity to provide protection against warmed-up engine emissions break through, is efficient in reducing cold-start emissions through early catalyst light-off. The catalytic converter is advantageously used in conjunction with an engine strategy employing oscillative spark retard during warm up to further reduce catalyst light-off and transient spark advance dampening to eliminate spiking of HC and CO during engine transients. When employed in conjunction with secondary air injection, the engine EEC is programmed to delay air injection for a period following cold-start sufficient to assure that catalyst light-off is rapidly attained.

Closely coupled exhaust catalyst system and engine strategy associated

The invention is a nitrogen oxide trap comprising a porous support; and catalysts consisting of manganese and potassium loaded on the porous support. The trap may be used in an internal combustion engine exhaust gas catalyst system. During lean-burn operation of the engine the trap sorbs nitrogen oxides and releases the nitrogen oxides during decreased oxygen concentration in the exhaust gas.

Potassium/manganese nitrogen oxide traps for lean-burn engine operation

The invention is a nitrogen oxide trap separate catalyst phases. One of the phases is platinum on a porous support and another is alkali metal or elements and alkaline earth elements on another porous support. The phases may be provided as an intimate mixture or as layers in the trap. The trap may be used in an internal combustion engine exhaust gas catalyst system. During lean-burn operation of the engine the trap adsorbs nitrogen oxides and releases the nitrogen oxides during decreased oxygen concentration in the exhaust gas.

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Farmington Hills, MI, United States of America

Haren S Gandhi