Method for determining the dew point in an exhaust line and apparatus for determinig the dew point in an exhaust line

A method is provided for determining the dew-point in an exhaust of an internal combustion engine. A stored value S is compared with a dew point threshold, whereby the stored value is calculated based on the quantity of the injected fuel, on the engine' s speed. If the quantity of injected fuel...

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Bibliographische Detailangaben
Hauptverfasser:	D'INTINO, MAURA, ROVATTI, GIOVANNI, DE FAZIO, TOMMASO
Format:	Patent
Sprache:	eng ; fre ; ger
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 STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	A method is provided for determining the dew-point in an exhaust of an internal combustion engine. A stored value S is compared with a dew point threshold, whereby the stored value is calculated based on the quantity of the injected fuel, on the engine' s speed. If the quantity of injected fuel is below a first quantity threshold Q1, the stored value S is decreased. S is also decreased if the engine speed is below a first second speed threshold n1 and the quantity of injected fuel is below a second quantity threshold Q2. If, the fuel quantity is equal to or higher than the second quantity threshold Q2, S is increased. It is also increased if the fuel quantity is at least as large as the first quantity threshold and the speed is at least as large as the speed threshold.