Sensor arrangement for an integrated pressure management apparatus
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United States of America Patent
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Mar 23, 2004
Grant Date -
Jan 2, 2003
app pub date -
Jun 29, 2001
filing date -
Jun 29, 2001
priority date (Note) -
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Abstract
A sensor arrangement and a method of verificating leaks in a fuel system including an integrated pressure management apparatus. The sensor arrangement comprises a chamber having an interior volume varying in response to fluid pressure in the chamber, a first switch, and a second switch. The chamber includes a diaphragm that is displaceable between a first configuration in response to fluid pressure above a first pressure level, a second configuration in response to fluid pressure below the first pressure level but above a second pressure level, and a third configuration in response to fluid pressure below the second pressure level. The third pressure level being lower than the second pressure level, and the second pressure level being lower than the first pressure level. The first switch is actuated by the diaphragm in the second configuration. And the second switch is actuated by the diaphragm in the third configuration.
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