| 摘要 |
A gas measuring system, having a measurement sensor ( 1 ) which records an exhaust gas from an internal combustion engine and has an outer electrode ( 6 ), which is exposed to the exhaust gas to be measured, a first measuring cell ( 4 ), a second measuring cell ( 8 ) that is connected to the first measuring cell ( 4 ), and in which a measuring electrode ( 10 ) is arranged, and a reference electrode ( 11 ) that is exposed to the ambient air. The measuring cells ( 4, 8 ) are located in a solid electrolyte ( 2 ), and all the electrodes ( 10, 11 ) are in contact with the solid electrolyte. A circuit which in a first pump flow (Ip 0 ) pumps oxygen ions between the first measuring cell ( 4 ) and the outer electrode ( 6 ), in a second pump flow (Ip 1 ) pumps oxygen ions between the second measuring cell ( 8 ) and the outer electrode ( 6 ), and in a third pump flow (Ip 2 ) pumps oxygen ions between the measuring electrode ( 10 ) and the outer electrode ( 6 ), and which comprises a control unit (C) which records Nernst voltages between the measuring cells ( 4, 8 ) and a reference electrode ( 11 ).
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