METHOD FOR DETECTING HEATER CORE ISOLATION VALVE STATUS

Methods and systems are provided for a vehicle coolant circuit. In one example, the coolant circuit includes a heater core isolation valve (HCIV) where a status of the HCIV may be diagnosed by intrusively activating a positive temperature coefficient heater in a cooling loop in which the HCIV is arr...

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Bibliographische Detailangaben
Hauptverfasser:	Jentz, Robert Roy, Vilson, Athira, Kalivarapu, Sridhar, Meissner, Herbert Thomas, Rejeti, Sitaram
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDEDFOR ELSEWHERE AUXILIARY DRIVES FOR VEHICLES BLASTING CHECKING-DEVICES COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES COOLING OF INTERNAL-COMBUSTION ENGINES COOLING OF MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL GENERATING RANDOM NUMBERS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INSTRUMENTATION OR DASHBOARDS FOR VEHICLES LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICS REGISTERING OR INDICATING THE WORKING OF MACHINES STEAM ENGINES SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF TIME OR ATTENDANCE REGISTERS TRANSPORTING VEHICLES IN GENERAL VOTING OR LOTTERY APPARATUS WEAPONS
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Beschreibung
Zusammenfassung:	Methods and systems are provided for a vehicle coolant circuit. In one example, the coolant circuit includes a heater core isolation valve (HCIV) where a status of the HCIV may be diagnosed by intrusively activating a positive temperature coefficient heater in a cooling loop in which the HCIV is arranged. A response of coolant temperature to heater activation may be used to determine a position of the HCIV.