Nitrogen oxide treating method for vehicle's spark ignition engine, involve combinely controlling increase of reticulated gas flow, decrease of intake gas flow, fuel injection and ignition offset when release of foot from pedal is detected

摘要

#CMT# #/CMT# The method involves combinely controlling an increase of reticulated gas flow, a decrease of intake gas flow, fuel e.g. petrol, injection and offset of ignition during detection of release of a foot from an acceleration pedal of a vehicle. The control is determined by using a pre-established mapping that is a function of a speed of the vehicle and rate of an internal combustion engine of the vehicle. #CMT#USE : #/CMT# Method for treating nitrogen oxide in an exhaust gas of an internal combustion engine i.e. spark ignition engine, of a vehicle by using an electronic computer. #CMT#ADVANTAGE : #/CMT# The method combinely controls the increase of the reticulated gas flow, the decrease of the intake gas flow, the fuel injection and the offset of ignition, thus controlling the richness and temperature of the exhaust gas of the engine during deceleration phase of the vehicle, and hence reducing the quantity of precious metal in a catalytic phase treating the nitrogen oxide. The mapping eliminates the need for a temperature sensor and a richness probe in a nitrogen oxide depollution system for treating the nitrogen oxide. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view of an internal combustion engine and an electronic computer implementing nitrogen oxide treating method. 1 : Intake duct 7 : Fuel injectors 9 : Exhaust duct 10 : Nitrogen oxide depollution system 12 : Exhaust gas recirculation valve 14 : Electronic computer.