Fuel tank system

摘要

A fuel tank system includes an ECU receiving an open signal Sa of a fuel supply SW. The ECU has a main control unit controlling a power unit of a vehicle, a main relay control circuit turning off a main relay when IGSW for causing the power unit to start or stop is turned off, SOAK time measurement circuit measuring an input time and no input time, the input time being a time during which the open signal Sa is continuously inputted to the ECU while the IGSW is off, the no input time being a time during which the open signal Sa is not inputted to the ECU while the IGSW is off with the fuel supply SW on, and a failure determination unit determining that the fuel supply SW has an abnormality when SOAK time is longer than a failure determination time.

主权项

1. A fuel tank system, comprising:
a fuel tank storing fuel; a lid member closing a fuel supply port of the fuel tank; a fuel supply switch for opening the lid member and outputting an open signal when the fuel supply switch is on; and a controller controlling and allowing the lid member to be opened based on the open signal outputted from the fuel supply switch, wherein the controller includes:
a main control unit controlling a power unit of a vehicle,a switching control unit interrupting an electric connection between an electric power supply and the main control unit when an ignition switch is turned off, the ignition switch operating to start and stop the power unit of the vehicle,a first timer measuring an input time period and no input time period while the ignition switch is off, the input time period being a time period during which the open signal is continuously inputted to the controller, the no input time period being a time period during which the open signal is not inputted to the controller while the fuel supply switch is on, anda failure determination unit determining that the fuel supply switch has a failure when a measured time period by the first timer is longer than a first threshold time period.