Method for operating a sensor element
First Claim
1. A method for operating a sensor element (10) for determining at least one gas component of a gas, in particular of an exhaust gas of a combustion engine, comprising a measured gas space (35), introduced into the sensor element (10), that is in communication with the gas located outside the sensor element (10), a first electrode (31) and a second electrode (32) being provided in the measured gas space (35) on an oxygen-ion-conducting solid electrolyte (21), and a third electrode (33) being provided outside the measured gas space (35), and oxygen being pumpable by application of a voltage between the second electrode (32) and the third electrode (33), wherein at least one predefined first time interval is provided;
- and a lower voltage is applied between the second and the third electrode (32, 33) in the first time interval than outside the first time interval.
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Accused Products
Abstract
A method for operating a sensor element (10) for determining at least one gas component of a gas, in particular of an exhaust gas of a combustion engine, is proposed. A measured gas space (35) that is in communication with the gas located outside the sensor element (10) is introduced into the sensor element (10). A first electrode (31) and a second electrode (32) are provided in the measured gas space (35) on an oxygen-ion-conducting solid electrolyte (21), and a third electrode (33) is provided outside the measured gas space (35). The second electrode (32) is electrically connected by the solid electrolyte (21) to the third electrode (33), so that oxygen is pumpable by application of a voltage between the second electrode (32) and the third electrode (33). A lower voltage is present between the second and the third electrode (32, 33) in a first time interval than outside the first time interval, so that under constant external conditions, the oxygen partial pressure in the measured gas space (35) is greater, at least when averaged over the durations, during a first time interval than during a second time interval.
14 Citations
30 Claims
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1. A method for operating a sensor element (10) for determining at least one gas component of a gas, in particular of an exhaust gas of a combustion engine, comprising a measured gas space (35), introduced into the sensor element (10), that is in communication with the gas located outside the sensor element (10), a first electrode (31) and a second electrode (32) being provided in the measured gas space (35) on an oxygen-ion-conducting solid electrolyte (21), and a third electrode (33) being provided outside the measured gas space (35), and oxygen being pumpable by application of a voltage between the second electrode (32) and the third electrode (33), wherein at least one predefined first time interval is provided;
- and a lower voltage is applied between the second and the third electrode (32, 33) in the first time interval than outside the first time interval.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
Specification