About 31 results
https://drivepatents.com/patents/1093181 · 17 Sep 2003
An exhaust emission control device has operating condition detecting means (66) for detecting an operating condition of an engine, fuel control means (64) for controlling fuel supply into a combustion chamber of the engine on the basis of an output of the ...
https://drivepatents.com/patents/1096861 · 16 Apr 2003
A method for controlling an engine exhaust gas system includes the steps of detecting an air-fuel ratio of exhaust gas discharged from an internal engine by an oxygen sensor, controlling the exhaust gas to near the stoichiometric air-fuel ratio by a closed...
https://drivepatents.com/patents/1097574 · 12 Mar 2003
A catalytic emission control apparatus of an internal combustion engine (1) that has an engine stop mode of stopping the internal combustion engine (1) during a run of a vehicle utilizes an oxygen absorption-storage action of an emission control catalyst (...
https://drivepatents.com/patents/1099338 · 8 Jan 2003
Method of monitoring the adsorptive capacity of a NOX adsorber of an internal combustion engine, comprising the following steps: 1) identification of O2 moles released from the adsorber during rich pulse regeneration, 2) calculation of NO2 moles released d...
https://drivepatents.com/patents/1100414 · 13 Nov 2002
A high-temperature NOx trap for trapping NOx in a lean condition in a high temperature range is so located as to trap NOx released from a low-temperature NOx trap for trapping NOx in the lean exhaust condition in a low temperature range. A sensor is provid...
https://drivepatents.com/patents/1102749 · 7 Aug 2002
The liquid auxiliary dosing system includes a determining arrangement (38) for determining an operating variable in the operating of the dosing pump unit (14), characterizing and adjusting this. A comparison-judgment unit (42,44) is provided for comparing ...
https://drivepatents.com/patents/1105651 · 3 Apr 2002
Process for regulating a nitrogen oxides absorber catalyst (3) in an I.C. engine (1) comprises using a nitrogen oxides-sensitive measuring device (4) arranged in the direction of the exhaust gas stream behind the catalyst, and a control unit (5). The nitro...
https://drivepatents.com/patents/1106582 · 20 Feb 2002
The engine has a mixture formation device for heat-controlled/ heat-regulated alternate production of fat exhaust gas in a first cylinder group (2), and lean exhaust gas in a second group (3). Each group has a separate exhaust pipe (4,5) with a catalyst (6...
https://drivepatents.com/patents/1109399 · 17 Oct 2001
A device for detecting deterioration of a NOx absorbent arranged in the exhaust passage of an engine. An O2 sensor generating a current proportional to the air-fuel ratio is arranged in the exhaust passage downstream of the NOx absorbent. When the amount o...
https://drivepatents.com/patents/1111924 · 4 Jul 2001
An exhaust purification device of an engine having an exhaust passage, comprising: a NOx absorbent (18) arranged in the exhaust passage (17); air-fuel ratio control means (20) for controlling the air-fuel ratio of the exhaust gas flowing into the NOx absor...