Suspension system
View Patent ↗The invention detects at least either one of a supply fault and a ground fault distinctively from a disconnection. A compressor relay 22 is placed between a battery 21 and an air compressor module 5 . The compressor relay 22 controls the drive and stop of the air compressor module 5 . A compressor driver 26 outputs a drive signal to the compressor relay 22 . A ground-side voltage monitor 28 detects the drive voltage of the compressor relay 22 . A pressure sensor 17 detects air pressure in a discharge side of the air compressor module 5 . A microcomputer 30 of a controller 25 detects a ground fault and a disconnection of the drive signal of the compressor 22 distinctively from each other on the basis of a voltage value Vg detected by the ground-side voltage monitor 28 and a pressure valve P detected by the pressure sensor 17.
1. A suspension system comprising:
a battery installed in a vehicle;
a fluid power pump operated by being powered by the battery;
a relay configured to connect the battery and the fluid power pump;
fluid power suspension bodies mounted on a plurality of wheels of the vehicle;
supply/exhaust valves placed between the fluid power pump and the respective fluid power suspension bodies;
an exhaust valve configured to discharge a working fluid in a discharge side of the fluid power pump;
a pressure detection device configured to detect pressure of the working fluid in the discharge side of the fluid power pump;
a relay driving device configured to output a drive signal to the relay;
a voltage detection device configured to detect drive voltage of the relay;
a vehicle behavior detection device configured to detect behavior of the vehicle; and
a control device,
wherein the control device includes a failure determination device configured to detect at least either one of a supply fault and a ground fault of the drive signal of the relay distinctively from a disconnection on the basis of a voltage value detected by the voltage detection device and a pressure value detected by the pressure detection device.
2. The suspension system of claim 1 ,
wherein the relay driving device and the voltage detection device are connected to a downstream side of the relay, and
wherein the failure determination device is configured to detect a disconnection and a ground fault of the drive signal of the relay distinctively from each other.
3. The suspension system of claim 1 ,
wherein the relay driving device and the voltage detection device are connected to an upstream side of the relay, and
wherein the failure determination device is configured to detect a disconnection and a supply fault of the drive signal of the relay distinctively from each other.
4. The suspension system of claim 1 ,
wherein the control device is configured to implement control for lowering vehicle height of the vehicle when a disconnection is detected by the failure determination device.
5. The suspension system of claim 1 ,
wherein the failure determination device is configured to reduce the pressure value of the discharge side of the fluid power pump before starting control for distinguishing between a ground fault and a disconnection of the drive signal of the relay.