DEVICE FOR DETERMINING A GAS MASS FLOW RATE, AND METHOD FOR RE-CALIBRATING SUCH A DEVICE

申请公布号：: WO2013135405(A1)
申请号：: WO2013EP51086
申请日期：: 2013.01.22
申请公布日期：: 2013.09.19
申请人：: PIERBURG GMBH
发明人：: WUEBBEKE, KARL;BAUMEISTER, LARS;KAMARYS, DIRK;SCHRAMMEK, MANFRED
分类号：: G01F25/00;G01F1/684;G01F1/692
主分类号：: G01F25/00
摘要：: Devices for determining a gas mass flow rate, which comprise two sensor units with a first sensor unit (20) provided with at least one first temperature measuring element (40; 42) and a first heating element (44), and a second sensor unit (22) provided with a second temperature measuring element (36) and a second heating element (50), and a control unit (52), by means of which the at least one temperature measuring element (40; 42) can be adjusted to controlled excess temperatures, are known. In order to obtain correct measurement values despite the occurrence of deposits that cannot be burned off, the control unit (52) is interconnected with the heating element (50) such that the heating element (50) of the second sensor unit (22) can be adjusted to a controlled excess temperature.