Exhaust gas treating installation controlling method for e.g. oil engine of motor vehicle, involves controlling reformer with reformate setting rate based on space coefficient and calculated reformate rate

摘要

The method involves introducing a reformate from a reformer e.g. water vapor reformer, with an exhaust gas in upstream of a nitrogen oxide trap (3) for obtaining a preset setting temperature of heated gas in upstream of a particle filter (4) to regenerate the filter. A calculated reformate rate is determined based on the temperature. A space coefficient is determined based on a difference between the temperature and a temperature (Tmes) measured in upstream of the filter. The reformer is controlled with a reformate setting rate (Qref-cons) based on the coefficient and the reformate rate.