Ford Global Technolgoies, LLC

Lifeng Xu

Robert Walter McCabe

Jeffrey Scott Hepburn

Gang Guo

Giovanni Cavataio

Jialin Yang

Diana D Brehob

George Wade Graham

John W Hoard

Karen Marie Adams

Shane Elwart

Allan J Lippa

Jason Aaron Lupescu

Carolyn Parks Hubbard

Richard Eugene Baker

Williams Lewis Henderson Watkins

Eric Matthew Kurtz

William Charles Ruona

Robert Henry Hammerle

Hungwen Jen

Ching-Hsong George Wu

Harendra S Gandhi

Justin Anthony Ura

Clifford Norman Montreuil

William Lewis Henderson Watkins

Manish Sharma

Rachael Jean Harrington

A hydrocarbon and NOx catalyst trap includes a three-way catalyst, and a zeolite layer adjacent to the three-way catalyst and including alumina and silica arranged to form a repeating skeletal frame that defines cavities including active metal active sites for hydrocarbon and NOx trapping such that individual atoms of the active metal are bound to the frame within the cavities via oxygen atoms.

Hydrocarbon and nitrogen oxides catalyst trap

A catalytic converter includes a hydrocarbon catalyst trap including BEA zeolite configured to adsorb iso-octane at ambient temperatures and desorb iso-octane at temperatures between 150&#xb0; C. and 170&#xb0; C., and active metal supercage impregnated USY zeolite configured to adsorb and coke iso-octane at temperatures greater than 150&#xb0; C.

Catalyst trap

A hydrocarbon trap catalyst and method of forming the same are disclosed. The method may include introducing copper into a zeolite at 10% to 75% of an ion-exchange level of the zeolite, introducing at least one of nickel and manganese into a zeolite at 50% to 100% total of an ion-exchange level of the zeolite, and applying a three-way catalyst layer. The copper and nickel and/or manganese may be introduced into a single zeolite or the copper may be introduced into a first zeolite layer and the nickel and/or manganese may be introduced into a second zeolite layer. If copper and another metal are introduced into the same zeolite, copper may be introduced first. The disclosed trap catalyst may increase the release temperature of hydrocarbons such as ethanol, propylene and toluene, and thus reduce vehicle cold start tailpipe emissions.

Use of transition metals to reduce cold start emissions

A low-temperature catalyst is provided for reducing cold-start hydrocarbon emissions. The catalyst comprises a platinum group metal impregnated onto an oxygen storage material. The catalyst may be used alone or may be included in a hydrocarbon trap containing a hydrocarbon adsorption material therein. The catalyst/hydrocarbon trap is positioned in the exhaust system of a vehicle downstream from a close-coupled catalyst such that the exhaust temperature at the catalyst location does not exceed 850&#xb0; C. during normal vehicle operation and when combined with a hydrocarbon adsorption material in a trap, the exhaust temperature does not exceed 700&#xb0; C.

Low temperature catalyst/hydrocarbon trap

A reverse flow hydrocarbon trap is provided that improves the conversion of hydrocarbons present in the exhaust gases of a vehicle to more environmentally benign compounds during cold engine starts. The trap includes a substrate having at least one exhaust gas passage therethrough, with the walls of the exhaust gas passage including a hydrocarbon trapping material and an oxidative catalyst. The substrate includes an inlet for hot exhaust gas from a vehicle engine and an outlet for the exhaust gas and further includes an inlet channel, an outlet channel, and an intermediate channel through which exhaust gas flows. The intermediate channel is oriented such that the flow of exhaust gas through the exhaust gas passage is reversed from the direction of flow in the inlet and outlet channels to improve the performance of the hydrocarbon trap.

Reverse flow hydrocarbon trap

A method is provided for controlling regeneration of an SCR catalyst. The method includes coordinating the regeneration duration and temperature (e.g., longer/shorter regenerations and/or lower/higher temperatures) to the urea deposit loading. In this way, improved regeneration may be achieved due to the particular nature of urea deposits on SCR catalysts.

Vehicle-based strategy for removing urea deposits from an SCR catalyst

The reduction of a NOx trap upon engine shutdown is disclosed. One disclosed embodiment comprises adjusting a timing of creating a reductive environment in the exhaust conduit upstream of the lean NOx trap based upon the determined engine stop position. The creation of a reductive environment in the exhaust conduit upstream of the lean NOx trap may help to at least partially reactivate the lean NOx trap during engine shutoff.

Reduction of NOx trap at engine shutoff

A diesel exhaust aftertreatment system and method are provided. The system includes a lean NOtrap for reducing NOand a transition metal-exchanged zeolite booster catalyst positioned downstream from the lean NOtrap for further reducing NO. The lean NOtrap includes a NOadsorbent material and one or more platinum group metals, and has a platinum group metal loading of less than about 90 g/ft. The aftertreatment system provides high NOconversion over a broad temperature range without the use of ammonia as a major reductant.

Exhaust aftertreatment system and method of treating exhaust gas

A method of regenerating a particulate filter utilizes two temperature levels, with the first, lower, level removing stored hydrocarbons and urea from an SCR catalyst. The second, higher, level then follows for filter regeneration. Because the regeneration occurs after the SCR catalyst has been purged of hydrocarbons and urea, for example, the temperature experienced by the SCR catalyst during regeneration is reduced. In this way, SCR degradation may be reduced.

Multi-stage regeneration of particulate filter

A system and method may be provided for operating a system having an engine with an emission control system, the emission control system including a lean NOx trap and a particulate filter, where after lean exhaust gas air-fuel ratio regeneration of the particulate filter at an elevated regeneration temperature, a rich or intermittently rich exhaust air-fuel ratio is provided for a duration lasting until LNT temperature falls to a minimum threshold, where said rich or intermittently rich operation reactivates catalysts in the LNT and reverses deactivation caused by the elevated temperature lean operation associated with previous particulate filter regeneration.

Particulate filter regeneration and NOx catalyst re-activation

An exhaust aftertreatment system for an internal combustion engine is disclosed which mitigates deleterious poisoning of a catalytic converter or exhaust gas oxygen sensor by phosphorus containing species.

System for minimizing the impact of poisoning of automotive exhaust aftertreatment systems

A system and method is disclosed for operating an internal combustion engine disposed in a hybrid vehicle, in which engine operation is selected to provide secondary vehicular functions, such as cabin heating, cabin cooling, and exhaust aftertreatment of exhaust components.

Control strategy for an internal combustion engine in a hybrid vehicle

A method for controlling torque in an internal combustion engine to cause an increase in temperature in an exhaust aftertreatment device is disclosed. One group cylinders feed exhaust gases to one exhaust aftertreatment device and another group of cylinders feed exhaust gases to another exhaust aftertreatment device. By operating the groups of cylinders at different operating conditions, the desired temperature in one of the exhaust aftertreatment devices can be achieved while also providing driver demanded torque.

Growing community of inventors

Farmington Hills, MI, United States of America

Lifeng Xu