PROCEDE DE DETERMINATION DE LA DUREE D'OUVERTURE D'UN ORIFICE

The invention relates to a method for determining the duration (t2-t-i) for which an orifice (27) separating two spaces (28, 29) containing a fluid at different pressures is open. According to the invention, the pressure (P) in one of said spaces is measured as a function of time (t) and the variati...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	DUBOIS VINCENT, LALLIARD ERIC, MASSOT GUILLAUME
Format:	Patent
Sprache:	fre
Schlagworte:	BLASTING 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 LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING STEAM ENGINES WEAPONS
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	The invention relates to a method for determining the duration (t2-t-i) for which an orifice (27) separating two spaces (28, 29) containing a fluid at different pressures is open. According to the invention, the pressure (P) in one of said spaces is measured as a function of time (t) and the variations in a characteristic stemming from the pressure measurement are determined, said opening time being determined on the basis of said variations in said characteristic, which may be the derivative or the acceleration of the pressure. The method is more particularly applicable to controlling the quantity of reducing agent, such as gaseous ammonia, injected into a catalytic system of the SCR type.