Apparatus and method for controlling and prevention of venting of gaseous fuel to atmosphere from a vehicle tank at completion of a fuelling process
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United States of America Patent
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Nov 28, 2000
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N/A
app pub date -
Apr 7, 1999
filing date -
Apr 7, 1999
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Abstract
In a gaseous fuelling system for motor vehicles, the residual gas in the fill lines is depressurized in a controlled manner to prevent gas 'blow back' from the vehicle tank. Methods for blow back detection and prevention in direct and indirect fill procedures are provided.
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