Electrically driven hydraulic pump actuator

An electrically driven linear motion device for a fixed displacement variable delivery pump comprising:

• a body;
• a piston slidably disposed in said body;
• a sleeve disposed about said piston;
• a field coil disposed within said body;
• an armature moveably disposed within said body;
• and
• a linkage connecting said armature to said sleeve and moving said sleeve relative to said piston in response to movement of said armature.

A fluid delivery system comprising:

• a fixed displacement variable delivery pump having a piston, a sleeve disposed about said piston and a high pressure outlet;
• a linear motion device connected to said sleeve and being actuatable to move said sleeve relative to said piston, said linear motion device being electrically driven;
• a high pressure rail connected to said high pressure outlet;
• a fluid pressure sensor connected to said high pressure common rail and being adapted to deliver a pressure signal responsive to said fluid pressure in said rail being at a predetermined value;
• and
• an electronic control module being connected to said electrically driven linear motion device and said fluid pressure sensor, said electronic control module being adapted to deliver a drive signal to said electrically driven linear motion device in response to reviewing said fluid pressure signal.