Abstract: A solenoid valve diagnostic apparatus includes a plurality of solenoid valves that open or close an entrance/exit opening of a fuel tank, a current sensor that measures an operating current of the solenoid valves, and a controller that diagnoses whether the solenoid valves fail, based on the operating current measured by the current sensor.

Abstract: In one aspect, an apparatus and a method for monitoring a hydrogen storage system of a vehicle to always monitor the hydrogen storage system of the vehicle are provided. The apparatus comprises a first temperature sensor that measures an internal temperature of a hydrogen tank, a second temperature sensor that measures an outdoor temperature, a comparator that determines whether a hydrogen leak occurs based on the result of comparing the internal temperature with the outdoor temperature and outputs a wake-up signal, and a controller that performs failure diagnosis of a hydrogen storage system, when receiving the wake-up signal.

Abstract: In one aspect, disclosed are a hydrogen leak sensing device and method for a fuel cell vehicle. The device comprises a processor configured to control a valve of a hydrogen tank, wherein the processor may calculate a state of fuel (SOF) of the hydrogen tank when the valve is closed and a SOF of the hydrogen tank when the valve is opened, and determine whether hydrogen leak has occurred based on the calculated SOFs.

Abstract: A solenoid valve diagnostic apparatus includes a plurality of solenoid valves that open or close an entrance/exit opening of a fuel tank, a current sensor that measures an operating current of the solenoid valves, and a controller that diagnoses whether the solenoid valves fail, based on the operating current measured by the current sensor.