System for controlling an electric oil pump

摘要

A system for accurately and reliably controlling an electric oil pump includes a control portion adapted to control rotation speed of the motor of the electric oil pump, a regulator valve including a valve body provided with a plurality of ports, a valve spool inserted in the valve body and an elastic member adapted to apply elastic force to the valve spool, and a switch mounted on one side of the valve body including first and second contact points, wherein the control portion increases the rotation speed of the motor when the switch is on and maintains the rotation speed of the motor when the switch is off.

主权项

1. A system for controlling an electric oil pump driven by a motor, comprising:
a control portion adapted to control a rotation speed of the motor of the electric oil pump; a regulator valve comprising a valve body provided with a plurality of ports, a valve spool inserted in the valve body, and an elastic member adapted to apply an elastic force toward one side of the valve spool; and a switch mounted on one side of the valve body, the switch comprising a first contact point that is movable relative to the valve body and a second contact point that is fixed on the one side of the valve body, and the switch transferring information to the control portion on whether the first and second contact points are in contact or not, wherein the regulator valve converts a hydraulic pressure received from the electric oil pump into an operating pressure and supplies the operating pressure, and the valve spool receives at least a portion of the operating pressure as a first control pressure and is movable in the valve body by a resultant force of the first control pressure and the elastic force, and the first and second contact points contact each other such that the control portion maintains the rotation speed of the motor when a force generated by the first control pressure is larger than or equal to the elastic force by a first predetermined value.