초록 ▼

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

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 to determine whether or not a leakage problem is occurring.

대표청구항 ▼

[ What is claimed is:] [1.] A gas fuel supply piping system having a filling conduit for filling a fuel container with a gas fuel for an engine and a supplying conduit for supplying the gas fuel from the fuel container to the engine, comprising:a block member serving as a plug of the fuel container;

[ What is claimed is:] [1.] A gas fuel supply piping system having a filling conduit for filling a fuel container with a gas fuel for an engine and a supplying conduit for supplying the gas fuel from the fuel container to the engine, comprising:a block member serving as a plug of the fuel container;a filling passage formed in the block member, the filling passage communicating the filling conduit to the fuel container;a supplying passage formed in the block member, the supplying passage communicating the supplying conduit to the fuel container;a filling passage stop valve for closing the filling passage, the filling passage stop valve being provided in the filling passage;a supplying passage stop valve for closing the supplying passage, the supplying passage stop valve being provided in the supplying passage;a gas filling inlet provided on an outward end of the filling conduit; anda leakage inspection gas filling inlet provided on the supplying conduit.