| abstract |
The hydrogen filling system includes: an accumulator for hydrogen gas; a piping that connects the accumulator to the hydrogen tank of the vehicle; a flow control valve, a pressure sensor, and a flow sensor, which are provided in this piping; and, the site ECU, It operates a flow control valve under specific filling conditions and controls the flow of hydrogen through the piping. The gas filling method uses this hydrogen filling system to fill the hydrogen tank with hydrogen from the accumulator, and includes the following steps: after starting the filling of the hydrogen, using the detection value of the pressure sensor when the flow rate of the hydrogen in the pipe decreases, from the Here, the value of the pressure loss coefficient related to the pressure loss caused by the piping is calculated; and the filling condition is changed to a condition defined based on the value of the pressure loss coefficient, and the hydrogen gas is continuously filled. |