F - Mech Eng,Light,Heat,Weapons – 17 – C
Patent
F - Mech Eng,Light,Heat,Weapons
17
C
F17C 5/06 (2006.01) F17C 5/00 (2006.01) F17C 13/02 (2006.01)
Patent
CA 2112458
2112458 9300264 PCTABS00019 A supply plenum and valve body assembly (40) connected to a source of compressed natural gas (CNG) selectively turns on the flow of CNG through either a first sonic nozzle (52) or a second sonic nozzle (54) and out through respective dispensing hose assemblies (28, 30). A pressure transducer (96), a supply plenum temperature transducer (118), and an ambient temperature transducer (91) measure the stagnation pressure and temperature of the CNG and the ambient temperature, respectively. A pressure transducer (92) fluidically connected to the vehicle tank via the dispensing hose assembly monitors the pressure of the CNG in the vehicle tank. An electronic control system (13) connected to the pressure and temperature transducers and to the supply plenum and control valve assembly (40) calculates a vehicle tank cut-off pressure based on the ambient temperature and on the pressure rating of the vehicle tank that has been pre-programmed into the electronic control system (13), calculates the volume of the vehicle tank and the additional mass of CNG required to increase the tank pressure to the cut-off pressure, and automatically turns off the CNG flow when the additional mass has been dispensed into the vehicle tank. The electronic control system (13) also determines the amount of CNG dispensed through the sonic nozzles (52, 54).
Custer Randal L.
Lopez John T.
Magin James A.
Miller Charles E.
Waers John F.
Natural Fuels Corporation
Smart & Biggar
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