About 104 results
https://drivepatents.com/patents/1067749 · 3 May 2006
The present invention relates to an engine exhaust gas cleaning method and system, which can effectively reduce emission amounts of particular components, such as NOx, contained in exhaust gas by adding an additive, such as urea water or light oil, into an...
https://drivepatents.com/patents/1068724 · 29 Mar 2006
There is provided an apparatus that estimates the NOx adsorption amount, comprising a NOx trap catalyst (22) that is disposed in an exhaust passage (20) of an engine, for adsorbing NOx in exhaust gases during lean operation and releasing and reducing the a...
https://drivepatents.com/patents/1070119 · 8 Feb 2006
An operating process for a combustion engine (10) that determines the loading of soot particles in the exhaust comprises measuring the conductance between electrodes in a particle sensor (16) in the exhaust gas stream (12) and periodically heating the sens...
https://drivepatents.com/patents/1073469 · 5 Oct 2005
An electronic control unit (6) of a diesel engine controls an operating state of the engine to a first operating state, in which particulate matters are easily generated, when inspection of a particulate filter regeneration system is performed. Thus, a par...
https://drivepatents.com/patents/1074305 · 14 Sep 2005
The invention relates to a diagnostic apparatus for diagnosing a deterioration state of a catalyst (40) in an engine (2), comprising: a memory for storing a preset criterion value and a predetermined range for a state variable of the engine (2) that correl...
https://drivepatents.com/patents/1074959 · 17 Aug 2005
Device for determining the loading state of a particle filter (1) of a combustion engine has a measurement arrangement comprising a coil-type conductor structure (4) that surrounds at least a partial volume of the particle filter. The measurement arrangeme...
https://drivepatents.com/patents/1077868 · 11 May 2005
In an exhaust passage (2) of an engine (1), there are provided an upstream side NOx storage reduction catalyst (7a); a downstream side NOx storage reduction catalyst (7b); an upstream side NOx sensor (29a) and a downstream side NOx sensor (29b) each of whi...
https://drivepatents.com/patents/1081263 · 29 Dec 2004
Nitrogen oxide purification system has a direct reduced-type nitrogen oxide catalyst arranged in an exhaust-gas passage so a catalyst component reduces nitrogen oxide to nitrogen when the oxygen concentration in engine exhaust gas is high. The catalyst com...
https://drivepatents.com/patents/1081138 · 29 Dec 2004
The method involves catalytically converting a hydrocarbon mass flow contained in exhaust gas in an exhaust gas re-treatment system, determining the maximum convertible mass flow at a current operating point depending on the state of the re-treatment syste...
https://drivepatents.com/patents/1082845 · 27 Oct 2004
Method for regenerating a storage catalyst (3) for an IC engine (1) comprises determining the degree of regeneration immediately after the regeneration process has been carried out.