Device and method for recalibrating an exhaust gas mass flow sensor
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United States of America Patent
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Nov 1, 2016
Grant Date -
Aug 13, 2015
app pub date -
Jul 16, 2013
filing date -
Sep 7, 2012
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Abstract
A device for recalibrating an exhaust gas mass flow sensor includes a first sensor, a second sensor, and a control unit. The first sensor comprises a heating element and a first temperature measuring element. The second sensor comprises a second temperature measuring element. The control unit controls a temperature signal produced at the heating element and comprises a first and second characteristic map. The first characteristic map plots an exhaust gas mass flow as a function of a heat dissipation of the heating element. A correction factor can be determined from the second characteristic map based on the temperature signal produced at the heating element and measured by the first temperature measuring element and based on a temperature signal measured via the heating element at the second temperature measuring element. The correction facture corrects a measured heat dissipation of the unit heating element to a corrected exhaust gas mass flow.
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