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Liquid Dosing Arrangement

  • US 20080077079A1
  • Filed: 12/21/2004
  • Published: 03/27/2008
  • Est. Priority Date: 12/21/2004
  • Status: Abandoned Application
First Claim
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1. A liquid dosing arrangement, comprising:

  • a liquid supply system comprising a first pressure sensor that measures a first pressure p1;

    a liquid delivery system comprising a second pressure sensor that measures a second pressure p2; and

    an injection valve between the liquid supply system and the liquid delivery system comprising a restricting member through which said liquid flows, and a pulsed opening and closing valve mechanism that operates said restricting member with opening pulses having frequency fo and width to, wherein the pressure drop Δ

    p over the injection valve (2) is Δ

    p=p1

    p2;

    with the pressure drop Δ

    p, and the dimensions (b, d1) of the restricting member in the injection valve making the velocity ν

    of the liquid flowing through the restricting member sufficiently high to make the flow Φ

    of liquid through the liquid delivery system essentially independent of the viscosity of the liquid.

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