Temperature correction method and subsystem for automotive...

G - Physics – 01 – M

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G01M 3/32 (2006.01) F02M 25/08 (2006.01)

Patent

CA 2304468

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.

L'invention concerne un procédé et un capteur ou sous-système capteur permettant d'améliorer la détection de fuites par évaporation dans un système d'alimentation en carburant. Le capteur ou sous-système capteur calcule les valeurs de la pression à compensation de température, ce qui a pour effet d'éliminer ou réduire des résultats positifs faux ou d'autres résultats indésirables provoqués par les variations de température dans le réservoir de carburant. La mesure de la pression à compensation de température permet ensuite de tirer une inférence liée à l'existence d'une fuite. Ainsi, on peut réduire ou éliminer toute erreur de détection due aux variations de température.

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