Hydraulically-actuated system having a variable delivery fixed d

Details Hydraulically-actuated system having a variable delivery fixed d Hydraulically-actuated system having a variable delivery fixed d

1998-03-11

2000-03-14

Moulis, Thomas N.

Internal-combustion engines

Charge forming device

Fuel injection system

123506, 417269, F02M 3704

Patent

active

060358289

ABSTRACT:
A hydraulically-actuated system includes a fixed displacement pump with a plurality of parallel disposed pistons that reciprocate in a pump housing that defines a high pressure area and a low pressure area. A control valve is attached to the pump housing and moveable between a first position in which the pistons displace fluid in a first proportion between the high pressure area and the low pressure area, and a second position in which the pistons displace fluid in a second proportion between the high pressure area and the low pressure area. A high pressure common rail is connected to the high pressure area of the pump. At least one hydraulically-actuated device is connected to the high pressure rail. A source of low pressure fluid is connected to the low pressure area of the pump. An electronic control module is in communication with and capable of controlling the position of the control valve.

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