US 12,345,215 B2
Exhaust-gas sensor for an internal combustion engine
Christian Heidtkamp, Munich (DE); David Wieland, Munich (DE); and Johannes Bentner, Munich (DE)
Assigned to VITESCO TECHNOLOGIES GMBH, Regensburg (DE)
Appl. No. 18/709,943
Filed by Vitesco Technologies GmbH, Regensburg (DE)
PCT Filed Nov. 7, 2022, PCT No. PCT/EP2022/081005
§ 371(c)(1), (2) Date May 14, 2024,
PCT Pub. No. WO2023/083757, PCT Pub. Date May 19, 2023.
Claims priority of application No. 10 2021 212 821.1 (DE), filed on Nov. 15, 2021.
Prior Publication US 2025/0012227 A1, Jan. 9, 2025
Int. Cl. F02D 41/14 (2006.01); G01N 27/419 (2006.01); G01N 33/00 (2006.01); F02D 41/28 (2006.01)
CPC F02D 41/146 (2013.01) [F02D 41/1493 (2013.01); G01N 27/419 (2013.01); G01N 33/0037 (2013.01); F02D 2041/281 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method for operating an exhaust gas sensor with a main body arranged in an exhaust gas system of an internal combustion engine, a pump cavity in the main body and housing a pump electrode, a measuring cavity in the main body connected to the pump cavity and housing a measuring electrode, and a reference cavity in the main body connected to ambient air and housing a reference electrode, the method comprising:
discharging oxygen from the measuring cavity by applying a measurement current to the measuring electrode so a measurement voltage between the measuring electrode and the reference electrode is kept at a predetermined first setpoint value;
discharging oxygen from the pump cavity by applying a pump current to the pump electrode so an electrode voltage between the pump electrode and the reference electrode is kept at a predetermined second setpoint value;
determining a nitrogen oxide value based at least in part on a value of the measurement current; and
adapting at least one of the first setpoint value for the measurement voltage based on the determined nitrogen oxide value or the second setpoint value for the electrode voltage based on the determined nitrogen oxide value.