| 摘要 |
A method of scheduling the regeneration of a lean NOx trap is provided in which purging of the lean NOx trap is based on a need to minimise the emission of NOx from a tailpipe of a vehicle. This is accomplished by using the relationship between NOx emissions from the tailpipe, and the engine running time or distance travelled. This way it is possible to predict the amount of time the engine can run, or the distance the car can travel between purge events that will minimise the amount of tailpipe NOx being produced by the engine. Therefore, regeneration, or purging, of the NOx trap can be scheduled for either when the engine has been running for a certain amount of time, or the car has travelled a certain distance.. |
