Gas fuel supply piping system

• Main Author: OTAKA, AKIFUMI
• Format: Patent
• Language: English; French; German
• Published: 27.01.1999
• Edition: 6
• Subjects: 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; COMBUSTION ENGINES; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED,LIQUEFIED, OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; 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; TRANSPORTING; VEHICLES IN GENERAL; VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED ORSOLIDIFIED GASES; WEAPONS

The leakage inspection for a compressed natural gas (CNG) supply piping system where a filling passage 4 and a supplying passage 5 are provided in a valve body 3 which serves as a block of a CNG fuel container. The filling passage 4 and the supplying passage are provided with a manual stop valves 13 and 7. A solenoid valve 8 is disposed at an open end of the supplying passage 8. A CNG filling inlet 10 is provided at an outer end of a filling conduit 9 communicated to the filling passage 4. A conduit 12 extending to an engine is provided with an inspection gas inlet 14. For the leakage inspection, the stop valves 7 and 13 are closed and an inspection gas is introduced from a leakage inspection gas inlet 14 and the filling inlet 10. It is examined by measuring a pressure change in the conduits 9 and 12 whether or not a leakage is occurs.