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| Number | Title | Issue Date |
| 7240482 | System for minimizing the impact of poisoning of automotive exhaust aftertreatment systems 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. ... | 07/10/2007 |
| 7030054 | PGM-free washcoats for catalyzed diesel particulate filter applications The present invention provides new platinum group metal (“PGM”) free catalytic compositions that comprise silver and/or cobalt stabilized ceria. These compositions facilitate soot oxidation during the regeneration of diesel particulate filters (DPF) thereby repl... | 04/18/2006 |
| 6951098 | Method and system for controlling temperature of an internal combustion engine exhaust gas aftertreatment device 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 exh... | 10/04/2005 |
| 6928359 | High efficiency conversion of nitrogen oxides in an exhaust aftertreatment device at low temperature A system and method for delivering reductant to a lean NOx catalyst receiving exhaust gases from an internal combustion engine operating at a lean air-fuel ratio in disclosed. Reductant supply is based on an amount of reductant stored within the catalyst. Furthermor... | 08/09/2005 |
| 6813884 | Method of treating diesel exhaust gases A diesel exhaust treatment system and method of oxidizing NO to NO2 at low temperatures are provided. The system utilizes a platinum catalyst on a zirconia-stabilized silica support which oxidizes NO in the exhaust gas to NO2 and uses the NO | 11/09/2004 |
| 6810660 | System for minimizing the impact of poisoning of automotive exhaust aftertreatment systems 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. ... | 11/02/2004 |
| 6742326 | High efficiency conversion of nitrogen oxides in an exhaust aftertreatment device at low temperature A system and method for providing operating conditions that provide higher efficiency NOx reduction in a lean NOx catalyst coupled to a lean-burning internal combustion engine. A catalyst containing reductant is caused to attain a temperature greater than 300° C. A... | 06/01/2004 |
| 6698191 | High efficiency conversion of nitrogen oxides in an exhaust aftertreatment device at low temperature A system and method for providing reductant to a lean NOx catalyst, when the temperature in the lean NOx catalyst is greater than 300° C., is disclosed. After the reductant is supplied under these conditions, the NOx conversion efficiency of the lean NOx... | 03/02/2004 |
| 6423293 | Oxygen storage material for automotive catalysts and process of using The invention is a mixed oxide oxygen storage material useful as a catalyst or catalyst washcoat. The mixed oxide is praseodymium oxide loaded onto a support of either cerium oxide or cerium-zirconium oxide. The praseodymium oxide is loaded on the support... | 07/23/2002 |
| 6187709 | Palladium catalyst pre-oxidation to reduce light-off temperature The invention is a method for preconditioning a palladium containing automotive catalyst by subjecting the catalyst to oxidation by means of an oxidizing gas containing at least 0.85% oxygen at a temperature of at least 450° C. preferably for at least 15... | 02/13/2001 |
| 6139814 | Thermally stable, high-surface-area metal oxides made by organic templating The invention is a method for producing a metal oxide product by steps including absorbing a liquid solution of metal oxide precursors onto crystalline or microcrystalline, porous structured organic material capable of being combusted at elevated temperat... | 10/31/2000 |
| 6052989 | Emission control system for internal combustion engines An emission control system is disclosed having an emission regulating system which includes an exhaust gas sensor positioned between a light-off catalyst and conditioning catalyst to provide more robust emissions.... | 04/25/2000 |
