About 11 results
https://drivepatents.com/patents/962223 · 1 Apr 2015
An exhaust gas purification system (1, 1A) for removing particulate matters and nitrogen oxides in the exhaust gas (G) of an internal combustion engine (10) is formed by disposing a previous-stage oxidation catalyst device (21), an ammonia-based solution f...
https://drivepatents.com/patents/1002075 · 30 May 2012
A method is provided for regenerating a LNT (13) in a diesel engine (9) exhaust aftertreatment system (7). Typically, the aftertreatment system (7) comprises a fuel reformer (12), a LNT (13), and a SCR catalyst (14) in that order. Over the course of the re...
https://drivepatents.com/patents/1003277 · 18 Apr 2012
The method involves estimating balance pressure at the level of a pressure sensor (20) based on external temperature, where the sensor is placed between a reagent tank (16) and a dosing unit (18) i.e. electrovalve, that injects reagent in exhaust gas in op...
https://drivepatents.com/patents/1015714 · 16 Feb 2011
The method involves heating fuel e.g. alcohol such as glycol, to an ignition temperature by oxidation catalytic conversion of a soot layer (3b) that is collected in a wall-flow particle filter. Exhaust gas is passed through a surface of a flow channel (3c)...
https://drivepatents.com/patents/1067361 · 17 May 2006
To provide, in an exhaust gas purification system of an internal combustion engine that reduces NOx occluded in a NOx catalyst by decreasing a quantity of an exhaust gas flowing through an occlusion reduction type NOx catalyst and supplying a reducing agen...
https://drivepatents.com/patents/1071548 · 28 Dec 2005
An exhaust gas purification device of an internal combustion engine arranging a catalyst suitable for reduction of NOx in exhaust gas by ammonia in the presence of excess oxygen in an engine exhaust passage, said device comprising: feeding means for feedin...
https://drivepatents.com/patents/1071904 · 14 Dec 2005
An exhaust gas purification device of an internal combustion engine arranging a catalyst (22) suitable for reduction of NOx in exhaust gas by ammonia in the presence of excess oxygen in an engine exhaust passage, said device comprising: feeding means (31,3...
https://drivepatents.com/patents/1072076 · 7 Dec 2005
An exhaust gas purification device of an internal combustion engine arranging a catalyst (22) suitable for reduction of NOx in exhaust gas by ammonia in the presence of excess oxygen in an engine exhaust passage (21), said device comprising: feeding means ...
https://drivepatents.com/patents/1086065 · 23 Jun 2004
An exhaust emission control apparatus for an internal combustion engine is capable of suppressing a nasty smell due to the hydrogen sulfide generated upon recovery from SOx poisoning. The exhaust emission control apparatus includes an NOx storage-reduction...
https://drivepatents.com/patents/1089676 · 11 Feb 2004
A method and system for freeze protecting liquid NOx reductants in which a liquid NOx reductant carried onboard a vehicle that could be exposed to cold weather conditions is heated by existing thermal energy generated by compressing the fuel used to power ...