Method of measuring a property of entrained gas in a hydraulic fluid and fluid-working machine
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United States of America Patent
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Nov 28, 2017
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app pub date -
Feb 23, 2011
filing date -
Feb 23, 2010
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Abstract
A method of measuring a property of entrained gas in a hydraulic liquid received by a working chamber of a fluid working motor, wherein the said property is determined from the period of time elapsing between the closure of a first valve to isolate the working chamber and the passive opening of a second valve to bring the working chamber into fluid communication with a manifold. The property may, for example, be related to the concentration of entrained gas in the received hydraulic liquid or the compressibility or bulk modulus of the received hydraulic fluid.
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