| Patent application number | Description | Published |
|---|
| 20080202096 | Particulate regeneration and engine control system - A particulate regeneration system for an engine is disclosed. The particulate regeneration system may have a particulate filter configured to remove particulate matter from a flow of engine exhaust, and a diesel oxidation catalyst located upstream of the particulate filter to facilitate oxidation of the trapped particulate matter. The particulate regeneration system may further have a regeneration device located upstream of the diesel oxidation catalyst and configured to selectively heat the exhaust above an oxidation temperature of the trapped particulate matter, and a selective catalytic reduction device located downstream of the particulate filter to remove NOx from the engine exhaust. The particulate regeneration system may also have a controller in communication with the regeneration device and the engine. The controller may be configured to modify engine operation in response to initiation of a regeneration event. | 08-28-2008 |
| 20080202097 | Engine exhaust treatment system - An engine exhaust treatment system is provided. The system may include a catalyst-based device including a catalyst configured to reduce an amount of NO | 08-28-2008 |
| 20080295494 | Multi-engine system with on-board ammonia production - A power system is provided having a first power source including at least one engine configured to combust a first air/fuel mixture and produce a first exhaust stream. The system also has a first exhaust passageway fluidly connected to the first power source and configured to receive the first exhaust stream. In addition, the system has a second power source including at least one engine configured to combust a second fuel/air mixture and produce a second exhaust stream. Furthermore, the system has a second exhaust passageway fluidly connected to the second power source and configured to receive the second exhaust stream. The system further has a first catalyst disposed within the first exhaust passageway to convert at least a portion of the first exhaust stream to ammonia | 12-04-2008 |
| 20080295499 | Exhaust system utilizing a low-temperature oxidation catalyst - An exhaust treatment system is provided having a first exhaust passageway fluidly connected to an engine. A particulate filter and a selective catalytic reduction catalyst are situated within the first exhaust passageway. In addition, the system has a first oxidation catalyst located within the first exhaust passageway upstream of the particulate filter and the selective catalytic reduction catalyst. The system also has a second exhaust passageway fluidly connected to the first exhaust passageway upstream and downstream of the first oxidation catalyst. The exhaust treatment system further has a sensor configured to sense a parameter indicative of an exhaust gas temperature. Furthermore, the system has a controller configured to direct exhaust gas through the first oxidation catalyst when the exhaust gas temperature is below a threshold temperature and direct the exhaust gas through the second exhaust passageway when the exhaust gas temperature is above the threshold temperature. | 12-04-2008 |
| 20080302093 | MULTI-ENGINE SYSTEM WITH ON-BOARD AMMONIA PRODUCTION - A power system is provided having a first power source including at least one engine configured to combust a first air/fuel mixture and produce a first exhaust stream. The fuel of the first air/fuel mixture may be liquefied petroleum gas. The system also has a first exhaust passageway fluidly connected to the first power source and configured to receive the first exhaust stream. In addition, the system has a second power source including at least one engine configured to combust a second fuel/air mixture and produce a second exhaust stream. Furthermore, the system has a second exhaust passageway fluidly connected to the second power source and configured to receive the second exhaust stream. The system further has a first catalyst disposed within the first exhaust passageway to convert at least a portion of the first exhaust stream to ammonia | 12-11-2008 |
| 20090056320 | Exhaust system having catalytically active particulate filter - A catalyst is disclosed. The catalyst contains a ternary nitride and at least one of gold, osmium, iridium, palladium, rhodium, rhenium, ruthenium, or cesium. The catalyst may be used for a particulate filter in an engine exhaust treatment system. | 03-05-2009 |
| 20090107119 | Method and system of thermal management in an exhaust system - A method for treating a flow of exhaust from an engine includes injecting reductant into the flow of exhaust with an injector disposed upstream from a catalytic device. The injector and the catalytic device are disposed in an exhaust system for the engine. The method also includes passing the flow of exhaust through the catalytic device, sensing a characteristic of at least one of the exhaust system and the engine, monitoring the sensed characteristic to recognize a condition associated with a formation of a decomposition material formed from the reductant, and controlling an operation of at least one of the engine and the exhaust system to increase a temperature in the exhaust system in response to the recognized condition. | 04-30-2009 |
| 20090194741 | Exhaust system having a carbon oxide catalyst - A catalytic filter system is disclosed. The catalytic filter system contains a catalyst including a ternary nitride and at least one of gold, osmium, iridium, palladium, rhodium, rhenium, ruthenium, or cesium. The catalytic filter system may further include an energy source situated to impart energy to the catalyst. | 08-06-2009 |
| 20090277159 | Selective Catalytic Reduction Using Controlled Catalytic Deactivation - An exhaust treatment control system includes a controller configured to determine a value representative of a NO | 11-12-2009 |
| 20100083638 | Exhaust system having sulfur removing device - An exhaust system for an engine is disclosed. The exhaust system may include a passageway configured to receive exhaust from the engine, and a recirculation circuit. The recirculation circuit is configured to recirculate exhaust from the passageway back into the engine. The exhaust system may also include an SO | 04-08-2010 |
| 20100101221 | CATALYSTS, SYSTEMS, AND METHODS FOR REDUCING NOx IN AN EXHAUST GAS - Catalysts, systems, and methods disclosed herein provide for reduced NO | 04-29-2010 |
| 20100139257 | SYSTEM AND METHOD FOR TREATING EXHAUST GASES - Systems and methods for treating exhaust gases are described. The disclosed systems and/or methods for treating exhaust gases could be used with any power plant, engine, hydrocarbon burning system, other NO | 06-10-2010 |
| 20110099996 | EXHAUST AFTERTREATMENT SYSTEM - An exhaust aftertreatment system for an engine is disclosed. The exhaust aftertreatment system including a first exhaust passage, an SCR catalyst disposed in the first exhaust passage, a second exhaust passage parallel with the first exhaust passage and fluidly coupled to the first exhaust passage upstream of the SCR catalyst and a container disposed in the second exhaust passage, the container configured to hold a volume of urea and to direct exhaust from the second exhaust passage through the volume of urea in the container. | 05-05-2011 |
