TECHNIQUES FOR THAWING A REDUCTANT INJECTOR AND A REDUCTANT TANK PRIOR TO AN INJECTION ATTEMPT

A method includes determining, at a controller having one or more processors, whether an ambient temperature is less than a predetermined temperature indicative of frozen reductant in an exhaust system of an engine. The method includes determining an injector thaw period for a reductant injector in...

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Bibliographische Detailangaben
Hauptverfasser:	AXE, Bryan D, FAIED, Louai A
Format:	Patent
Sprache:	eng ; fre ; ger
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
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Beschreibung
Zusammenfassung:	A method includes determining, at a controller having one or more processors, whether an ambient temperature is less than a predetermined temperature indicative of frozen reductant in an exhaust system of an engine. The method includes determining an injector thaw period for a reductant injector in the exhaust system when the ambient temperature is less than the predetermined temperature. The method includes determining a tank thaw period for a reductant tank associated with the exhaust system, the reductant tank being configured to supply reductant to the reductant injector. The method also includes controlling (i) a heater to heat the reductant tank for the tank thaw period and (ii) a current provided to the reductant injector for the injector thaw period, such that the tank thaw period and the injector thaw period end at a same time.