About 43 results
https://drivepatents.com/patents/1105851 · 20 Mar 2002
A process for controlling nitrogen oxide (NOx) regeneration in a NOx storage catalyst, located in the exhaust gas of a lean burn combustion engine, comprises establishing the catalyst damage and then controlling the flow of a reducing agent during regenera...
https://drivepatents.com/patents/1107048 · 23 Jan 2002
An exhaust emission control system for an internal combustion engine, having a catalyst provided in an exhaust system of the engine for purifying exhaust gases, and a NOx removing device provided downstream of the catalyst for absorbing NOx contained in th...
https://drivepatents.com/patents/1108222 · 28 Nov 2001
A forced stoichiometric combustion is executed every time a cumulative travel distance of a vehicle increases by a distance, thereby creating an opportunity to determine an air-fuel ratio value in a region in which a rich spike control is performed. Theref...
https://drivepatents.com/patents/1109577 · 4 Oct 2001
Process for purifying IC engine exhaust gases comprises terminating a NOx regeneration depending on one of the NOx storage catalysts (3, 4); and measuring a condition parameter value characteristic for the termination of the NOx regeneration. An Independen...
https://drivepatents.com/patents/1110131 · 19 Sep 2001
A method and system for controlling the operation of "lean-burn" internal combustion engines determines a current rate of vehicle NOx emissions, and determines a threshold value for permissible vehicle NOx emissions based on at least one current value for ...
https://drivepatents.com/patents/1110122 · 19 Sep 2001
An engine control system for managing lean operation of an internal combustion engine coupled to a lean NOx trap (72) uses an indication of vehicle activity. A target amount of tailpipe emission per distance is adjusted based on the vehicle activity indica...
https://drivepatents.com/patents/1110100 · 19 Sep 2001
An engine control system for managing lean NOx trap decontamination uses associated fuel economy impacts to determine when decontamination is enabled. In particular, a maximum achievable benefit provided by lean operation with a decontaminated NOx trap (72...
https://drivepatents.com/patents/1110093 · 19 Sep 2001
An engine control system of an internal combustion engine coupled to a NOx trap (72) uses a measured air-fuel ratio downstream of the NOx trap (72) to control engine air-fuel ratio. The measured air-fuel is only used for feedback when it indicates a value ...
https://drivepatents.com/patents/1110079 · 19 Sep 2001
An engine control system for managing lean NOx trap decontamination uses associated fuel economy impacts to determine when decontamination is enabled. In particular, a maximum achievable benefit provided by lean operation with a decontaminated NOx trap, a ...
https://drivepatents.com/patents/1110351 · 12 Sep 2001
A method of minimising torque disturbances in an internal combustion engine (13) for a vehicle having a lean NOx trap (53) that is periodically purged. The method includes the steps of generating feedforward values of first engine characteristics as a func...