Catalytic nitrogen oxide trapping device desulphurizing system for e.g. diesel engine of motor vehicle, has control unit for triggering desulphurizing phase of catalytic nitrogen oxide trapping device based on desulphurizing criteria

摘要

#CMT# #/CMT# The system has an electronic control unit (5) for triggering a desulphurizing phase of a catalytic nitrogen oxide trapping device (1) based on desulphurizing criteria, where the criteria is a ratio between estimated quantity of fuel and estimated mass of sulfur oxide that is desorbed during the desulphurizing phase. The fuel quantity and sulfur oxide mass are estimated based on an average operating point of an internal combustion engine (3) and predetermined desulphurizing efficiency. #CMT# : #/CMT# An independent claim is also included for a method for desulphurizing a catalytic nitrogen oxide trapping device. #CMT#USE : #/CMT# System for desulphurizing a catalytic nitrogen oxide trapping device placed in an exhaust line of an internal combustion engine e.g. diesel engine, of a motor vehicle. #CMT#ADVANTAGE : #/CMT# The desulphurizing system optimizes the desulphurizing phase of the trapping device in an inexpensive manner, limits over consumption of the fuel during the desulphurizing phase, and prevents the dilution of fuel in lubricating oil of the engine. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view of a catalytic nitrogen oxide trapping device desulphurizing system. `(Drawing includes non-English language text)` 1 : Catalytic nitrogen oxide trapping device 2 : Exhaust line 3 : Internal combustion engine 4 : Motor vehicle 5 : Electronic control unit.