Temperature correction method and subsystem for automotive...

Details Temperature correction method and subsystem for automotive... Temperature correction method and subsystem for automotive...

2007-03-27

2007-03-27

Williams, Hezron (Department: 2856)

Measuring and testing

With fluid pressure

Leakage

C702S051000

Reexamination Certificate

active

09165772

ABSTRACT:
A method and sensor or sensor subsystem permit improved evaporative leak detection in an automotive fuel system. The sensor or sensor subsystem computes temperature-compensated pressure values, thereby eliminating or reducing false positive or other adverse results triggered by temperature changes in the fuel tank. The temperature-compensated pressure measurement is then available for drawing an inference regarding the existence of a leak with reduced or eliminated false detection arising as a result of temperature fluctuations.

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“Correcting Pressure Change Leak Test Data for Changes in Temperature”, Nondestructive Testing Handbook, vol. 1, Leak Testing, Robert C. Mc.Master (Editor), 1984, pp. 218-222.

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