EXHAUST EMISSION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

PROBLEM TO BE SOLVED: To avoid deterioration in exhaust property by precisely predicting NOx desorption quantity in a NOx trap catalyst during rich spike control and appropriately controlling the supply quantity of a reducing agent used for desorption of NOx.SOLUTION: During a period of time when a...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
1. Verfasser:	HOSAKA YUICHI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION STEAM ENGINES TRANSPORTING WEAPONS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To avoid deterioration in exhaust property by precisely predicting NOx desorption quantity in a NOx trap catalyst during rich spike control and appropriately controlling the supply quantity of a reducing agent used for desorption of NOx.SOLUTION: During a period of time when a reducing agent dominates the desorption of NOx and a NOx desorption rate (NOx desorption quantity) is substantially fixed immediately after rich spike control, exhaust λ is fixed at a predetermined value and supply of the reduction agent is controlled. During the following time period when adsorption/desorption of NOx is dominated according to Langmuir adsorption equation and the NOx desorption rate is reduced, the exhaust λ is made variable according to the NOx desorption rate and supply of the reduction agent is controlled.