| 摘要 |
PROBLEM TO BE SOLVED: To provide an evaporative fuel treatment device including a failure detector for a pressure sensor detecting the internal pressure of a fuel tank, capable of detecting a failure of the pressure sensor at an early stage by always detecting breaking or short-circuit of a sensor circuit as one of failure patterns of the pressure sensor.SOLUTION: An evaporative fuel treatment device configured to cause a canister 21 to adsorb an evaporative fuel in a fuel tank 15 and to draw in the adsorbed evaporative fuel in an engine 11, and including a pressure sensor 26 detecting an internal pressure of the fuel tank 15, comprises pressure-sensor-failure determination means determining that a failure occurs to the pressure sensor 26 if a change per unit time in the pressure detected by the pressure sensor 26 is equal to or greater than a first predetermined value that is greater than a maximum value of possible pressure changes of the fuel tank 15. |
