Suspension controller and suspension apparatus

A suspension controller for controlling a damping force of a suspension of a vehicle by controlling a current from a power supply to a solenoid of a shock absorber of the suspension,

• wherein the suspension controller is configured to:
• set a target current value;
• set a current limitation value;
• detect a current value of a first current supplied to the solenoid that is configured to control the damping force of the shock absorber of the suspension;
• set a duty ratio based on the target current value, based on the current limitation value, and based on the detected current value;
• supply the solenoid with a second current that corresponds to the duty ratio and to a power supply voltage;
• and
• change the current limitation value based on the duty ratio,
• wherein the current limitation value is an upper limit value that is supplied to the solenoid, and
• wherein when a relationship between the duty ratio and the current value no longer satisfies a predetermined first relationship, the suspension controller is configured to decrease the current limitation value on a stepwise basis with respect to time.