Hydraulic system having a variable delivery pump

Details Hydraulic system having a variable delivery pump Hydraulic system having a variable delivery pump

1999-11-04

2000-12-19

Thorpe, Timothy S.

Pumps

Condition responsive control of drive transmission or pump...

Having condition responsive pumped fluid control

417298, 417273, F02M 4702

Patent

active

06162022&

ABSTRACT:
A variable delivery liquid pump system includes a housing defining an inlet, an outlet and a plunger bore. A rotating shaft includes a cam that defines a fixed displacement distance with each rotation of the shaft. A plunger is slidably positioned in the plunger bore. A supply of liquid at a supply pressure is attached to the inlet by a supply passage. An output control mechanism includes an electronically-controlled flow restriction valve positioned in the supply passage. The plunger retracts less than the fixed displacement distance of the cam during each rotation of the shaft when the flow restriction valve is at least partially closed. The variable delivery pump is particularly suited for use in a hydraulically-actuated fuel injection system.

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