Device and method for recalibrating an exhaust gas mass flow sensor

摘要

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.

主权项

1. A device for recalibrating an exhaust gas mass flow sensor, the device comprising:
a first sensor unit comprising a first sensor unit heating element and at least one first sensor unit temperature measuring element; a second sensor unit comprising a second sensor unit temperature measuring element; and a control unit configured to control a temperature signal produced at the first sensor unit heating element, the control unit comprising, a first characteristic map in which an exhaust gas mass flow is plotted as a function of a heat dissipation of the first sensor unit heating element, and a second characteristic map from which a correction factor can be determined based on the temperature signal produced at the first sensor unit heating element and measured by the at least one first sensor unit temperature measuring element and based on a temperature signal measured via the first sensor unit heating element at the second sensor unit temperature measuring element, wherein, the correction facture is used to correct a measured heat dissipation of the first sensor unit heating element to a corrected exhaust gas mass flow.