| 摘要 |
<p>Provided is a gaseous fuel supply device that can estimate the amount of deposited impurities in a fuel filter. On a fuel supply line (14) that supplies an internal combustion engine (16) with compressed natural gas (CNG) that is stored in a fuel tank (12), the fuel vapour supply device (10) is provided with a regulator (22) that regulates fuel pressure, and a fuel filter (24) that is downstream of the regulator (22) and removes impurities from the fuel vapour. Also provided are a pressure sensor (26) that is downstream of the fuel filter (24) and detects fuel pressure, and a deposition amount estimation device (28) that estimates the amount of deposited impurities in the fuel filter (24) on the basis of the pressure detected by the pressure sensor (26). The deposition amount estimation device (28) determines whether or not the time to replace the fuel filter (24) has arrived on the basis of the pressure detected by the pressure sensor (26) and a threshold corresponding to the upper limit of the deposition amount.</p> |
