METHOD OF PRE-EMPTIVELY REGENERATING A LEAN NOX TRAP

摘要

A method of predicting the future use of a vehicle or an engine of the vehicle is used to evaluate whether NOx slippage from a lean NOx trap is likely to occur during a current drive cycle and also for scheduling when favorable conditions are likely to exist to purge the lean NOx trap before the slippage of NOx from the lean NOx trap is expected to occur.

主权项

1. A method of pre-emptively regenerating a lean NOx trap arranged to receive exhaust gas from a lean burn engine of a vehicle, the method comprising using a prediction of future operation of the vehicle to estimate a probability of NOx slippage from the lean NOx trap during the current drive cycle, and, if NOx slippage is expected to occur in the current drive cycle, use the prediction of future operation of the vehicle to infer whether there are any forthcoming opportunities to regenerate the lean NOx trap in a favorable manner before the slippage is predicted to occur and, if such favorable opportunities exist, schedule the regeneration of the lean NOx trap for the next favorable opportunity.