Patent application number | Description | Published |
20100064662 | DIESEL CATALYST SYSTEM - A selective catalytic reduction system for reducing nitric oxides emission levels from a compression ignition engine includes a first reductant injector located upstream a first catalyst including a selective catalytic reduction coating. A second reductant injector is located downstream the first catalyst; and a second catalyst is placed downstream the second reductant injector and includes a selective catalytic reduction coating. | 03-18-2010 |
20100139249 | EXHAUST GAS AFTER TREATMENT SYSTEM - An exhaust gas after treatment system includes a diesel particulate filter unit (DPFU) provided downstream of a diesel engine, a selective catalytic reduction (SCR) arrangement provided in fluid communication with said DPFU, a first injector for feeding reducing agent into the exhaust gas provided downstream of said DPFU and upstream of said SCR, at least one NOx sensor provided downstream of said SCR for providing at least one NOx signal to a NOx coordinator, at least one temp sensor provided upstream and/or downstream of said SCR for providing at least one temp signal to said NOx coordinator, wherein said NOx coordinator is provided for switching said diesel engine into a high NOx mode or a low NOx mode depending on the values of the at least one NOx signal and the at least one temp signal. | 06-10-2010 |
20120059572 | METHOD FOR CONTROLLING AN EXHAUST GAS TEMPERATURE - A method is provided for controlling an exhaust gas temperature of an engine of a vehicle during interruption of fuel supply to the engine, wherein the engine drives a driveline of the vehicle. The method involves alternating between two or more operational modes, wherein at least one of the operational modes maintains a higher exhaust temperature than the one or more other operational modes. | 03-08-2012 |
20120060477 | OPERATING METHOD FOR AN EXHAUST AFTERTREATMENT SYSTEM AND EXHAUST AFTERTREATMENT SYSTEM - An operating method of an exhaust gas aftertreatment system including at least a particulate filter for retaining soot from the exhaust gas of an engine and a deNOx catalytic converter for reducing nitrogen oxide in the exhaust gas of the engine is provided. Operation regimes of the particulate filter and of the deNOx catalytic converter are synchronized with respect to each other for performing regeneration of the particulate filter while the catalytic converter provides a nitrogen oxide conversion efficiency above a predetermined limit. | 03-15-2012 |