A METHOD AND SYSTEM FOR DIAGNOSING AT LEAST ONE PRESSURE RELIEF VALVE OF A LIQUEFIED GAS FUEL SYSTEM FOR A VEHICLE

The present invention relates to a method for diagnosing at least one pressure relief valve of a liquefied gas fuel system (A) for a vehicle. Said fuel system (A) has tank (10) for providing fuel to the engine of the vehicle, and at least one pressure relief valve (22, 24) set to open at a predeterm...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	GRALDE, Marcus, FORSLUND, Anders
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACTUATING-FLOATS 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 AUXILIARY DRIVES FOR VEHICLES BLASTING COCKS COMBUSTION ENGINES DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED,LIQUEFIED, OR SOLIDIFIED GASES FIXED-CAPACITY GAS-HOLDERS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INSTRUMENTATION OR DASHBOARDS FOR VEHICLES LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS STORING OF DISTRIBUTING GASES OR LIQUIDS SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF TAPS THERMAL INSULATION IN GENERAL TRANSPORTING VALVES VEHICLES IN GENERAL VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED ORSOLIDIFIED GASES WEAPONS
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Beschreibung
Zusammenfassung:	The present invention relates to a method for diagnosing at least one pressure relief valve of a liquefied gas fuel system (A) for a vehicle. Said fuel system (A) has tank (10) for providing fuel to the engine of the vehicle, and at least one pressure relief valve (22, 24) set to open at a predetermined pressure for evacuating evaporated gas. The method comprises the steps of: connecting a temporary pressure relief valve (22T, 24T) to said at least one pressure relief valve (22, 24), said temporary pressure relief valve being set to open at a pressure above said predetermined pressure; increasing the pressure in the tank to a pressure above said set pressure; determining if said at least one pressure relief valve opens (22, 24); if said at least one pressure relief valve opens, determine at what pressure said at least one pressure relief valve opens; and, based on the determinations of if said at least one pressure relief valve opens, and if said at least one pressure relief valve opens, at what pressure said at least one pressure relief valve opens, performing a diagnosing of the functionality of said at least one pressure relief valve. The present invention also relates to a system for diagnosing at least one pressure relief valve of a liquefied gas fuel system. The present invention also relates to a vehicle.