A power steering pump comprises a housing that includes a bore, a fluid
discharge port that supplies pumped fluid into the bore, and a fluid
bypass port for recycling excess fluid to the pumping elements. The pump
outlet is at one end of the bore. A flow control valve is slideably
received in the bore and regulate the size of the inlet to the fluid
bypass port. The pump includes a solenoid assembly that has a plunger
that is operatively connected to the flow control valve through the
second end of the bore opposite the pump outlet. By adjusting the
magnitude of the current to the electromagnetic coil of the solenoid
assembly, the position of the flow control valve is varied to increase or
decrease fluid flow to the fluid bypass port and thereby regulate the
output from the pump.