Vehicle body inclination controller and failure determination device for vehicle body inclination controller

A failure determination device for a vehicle body inclination controller,

• the vehicle body inclination controller comprising:
• an air spring that is arranged at a position for supporting a vehicle body and that supports the vehicle body based on a pressure of air stored in the air spring;
• an air reservoir that stores high-pressure air pressurized to a pressure higher than the pressure of the air stored in the air spring and supplies the high-pressure air to the air spring;
• valve devices each of which includes a supply valve that controls supply of the high-pressure air from the air reservoir to the air spring and an exhaust valve that controls exhaust of the air stored in the air spring from the air spring to an outside, the valve devices being arranged in parallel in a path for supplying the high-pressure air from the air reservoir to the air spring and a path for exhausting the stored air from the air spring to the outside;
• a valve driver that outputs a signal to the supply valve for controlling the supply of the high-pressure air and a signal to the exhaust valve for controlling the exhaust of the stored air;
• and
• an acquisition section that acquires supply control information which is information on a value relating to supply control of the high-pressure air in the supply valve and exhaust control information which is information on a value relating to exhaust control of the stored air in the exhaust valve,
• the failure determination device comprising:
• a communication section that receives the supply control information and the exhaust control information acquired by the acquisition section;
• and
• a determination section that compares, with a predetermined threshold, at least one of a value of a ratio between the supply control information of the supply valve and the exhaust control information of the exhaust valve in the same valve device, a value of a ratio between pieces of the supply control information of the supply valves of different valve devices, or a value of a ratio between pieces of the exhaust control information of the exhaust valves of different valve devices, and determines that a failure occurs in the same valve device or at least one of the different valve devices when the value of the ratio exceeds the predetermined threshold.