Patent ID: 8727453

Claim:
A hydraulic pressure control apparatus comprising: an electromagnetic valve which has: (a) a valve body configured with an elastic member, to force the valve body to one side; and (b) a coil configured to drive the valve body to the other side, on the basis of a command current value; and at least one of a hardware processor and circuitry, configured to effect: a hydraulic pressure control section to apply an initial command current value to drive the electromagnetic valve during testing, to control an opening or closing of the electromagnetic valve using the initial command current value; a current detection section to detect a value of a current passing through the coil, during a driving of the electromagnetic valve using the initial command current value; and a command current value correction section to utilize the current passing through the coil to detect a change of an inductance of the coil when the valve body moves from the one side to the other side or from the other side to the one side through the current detection section for the opening or closing of the electromagnetic valve, and to correct the initial command current value to the command current value using the detected inductance change, to reduce an offset variation of the opening or closing of the electromagnetic valve from a predetermined reference opening or closing of a predetermined reference electromagnetic valve.