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System and Method for Controlling a Hydraulic System

  • US 20040164609A1
  • Filed: 06/20/2003
  • Published: 08/26/2004
  • Est. Priority Date: 02/26/2003
  • Status: Active Grant
First Claim
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1. A method for controlling a hydraulic system including a valve having a small orifice and a large orifice comprising:

  • generating a first pressure difference across the valve;

    bleeding off a small amount of a fluid at an upstream side of the valve thereby generating a pressure difference less than the first pressure difference at an onset of a pressure build across the valve; and

    opening the large orifice of the valve in response to said reduced pressure difference thereby preventing a high pressure difference across the valve and generating a maximum control pressure gradient.

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