METHOD AND APPARATUS FOR MEASURING VOLUME

申请公布号：WO1983002321(A1)

申请号：US1982001677

申请日期：1982.11.29

申请公布日期：1983.07.07

摘要：<p>A method and apparatus for measuring the volume of a chamber in a part, such as the combustion chamber (14) of an internal combustion engine cylinder head (10) by, comparing the test chamber with a reference chamber (24) of known volume, wherein the reference chamber is exposed to the part (10) containing the test chamber so that ambient variables are minimized, and accurately controlled quantities of a gas are injected into each chamber and the difference in pressures in the chambers read as a function of test chamber volume, and thereafter the rate of change of pressure differences in the chambers is read as a function of chamber leakage and the volume measurement discarded if the rate of change exceeds a determined value.</p>

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