Methods and apparatuses for diagnosing leaks in a compressed natural gas delivery system

Methods and systems for detecting a leak in a compressed natural gas (CNG) delivery system of a vehicle are disclosed. According to some embodiments the method includes determining a first amount of CNG in a CNG tank of the vehicle, the first amount corresponding to a first time, and determining a s...

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Bibliographische Detailangaben
Hauptverfasser:	COTTRELL MICHAEL, NAIDU SRINI
Format:	Patent
Sprache:	eng
Schlagworte:	ALARM SYSTEMS ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING ORSUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES INGENERAL BLASTING BOTTLES, JARS OR SIMILAR CONTAINERS CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OFBOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOTOTHERWISE PROVIDED FOR CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL CONTROLLING COMBUSTION ENGINES CONVEYING FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED,LIQUEFIED, OR SOLIDIFIED GASES FIXED-CAPACITY GAS-HOLDERS FUNNELS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HANDLING THIN OR FILAMENTARY MATERIAL HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INTERNAL-COMBUSTION PISTON ENGINES LIGHTING LIQUID HANDLING MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGINGARTICLES OR MATERIALS MEASURING MECHANICAL ENGINEERING OPENING, CLOSING ORDER TELEGRAPHS PACKING PERFORMING OPERATIONS PHYSICS SIGNALLING SIGNALLING OR CALLING SYSTEMS STORING STORING OF DISTRIBUTING GASES OR LIQUIDS SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TESTING TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR TRANSPORTING UNPACKING VEHICLES IN GENERAL VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED ORSOLIDIFIED GASES WEAPONS
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Beschreibung
Zusammenfassung:	Methods and systems for detecting a leak in a compressed natural gas (CNG) delivery system of a vehicle are disclosed. According to some embodiments the method includes determining a first amount of CNG in a CNG tank of the vehicle, the first amount corresponding to a first time, and determining a second amount of CNG in the CNG tank at a second time, the second time being subsequent to the first time. The method further includes determining an expected CNG consumption of the vehicle during a period of time, the period of time beginning at the first time and ending at the second time. The method also includes determining an actual CNG consumption during the period of time based on the first amount of CNG and the second amount of CNG, and comparing the actual CNG consumption and the expected CNG consumption to determine whether a leak has occurred.