Patent ID: 7267991
Filing Date: 2007-09-11
Classification: B01D,F01N,F02D,G01N,Y02A,Y02T,Y10T

Abstract:
1. Method for estimating sulfur content in fuel of an internal combustion engine ( 1 ) equipped with at least one cylinder ( 2 ) and at least one catalyser ( 11 ), said catalyser ( 11 ) being capable of storing a quantity of sulfur and NO x groups and being subjected to a regeneration process to remove NO x groups when efficiency (I) of the catalyser ( 11 ) falls outside an acceptable range, the method providing a determination of a percentage (S) of sulfur present in fuel supplied during a specific measurement time interval by dividing a quantity (SO xstored ) of sulfur stored in the catalyser ( 11 ) during the measurement time interval by a product of a fixed conversion constant (K SOx ) and a mass of fuel (m fuel ) supplied to the cylinder ( 2 ) in the measurement time interval, comprising the steps of estimating a first quantity (NO estimating a second quantity (NO estimating said quantity (SO obtaining each said quantity (NO