US 11,940,350 B2
Method and device for diagnosing at least one exhaust gas sensor of an internal combustion engine disposed in an exhaust duct
Bernd Kraewer, Winnenden (DE); Magnus Labbe, Moeglingen (DE); Maik Unverricht, Rutesheim (DE); and Simon Fass, Denkendorf (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on Oct. 25, 2022, as Appl. No. 17/972,917.
Claims priority of application No. 10 2021 212 025.3 (DE), filed on Oct. 26, 2021.
Prior Publication US 2023/0129835 A1, Apr. 27, 2023
Int. Cl. G01M 15/02 (2006.01); F02D 41/14 (2006.01); F02D 41/22 (2006.01)
CPC G01M 15/02 (2013.01) [F02D 41/1461 (2013.01); F02D 41/1463 (2013.01); F02D 41/222 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for diagnosing at least one exhaust gas sensor (22;24;26) of an internal combustion engine (10), the at least one exhaust gas sensor (22;24;26) disposed in an exhaust duct (21), the method comprising:
introducing ambient air (12) into the exhaust duct (21) by means of a device (27), when an operating state is present in which the internal combustion engine (10) does not produce an exhaust gas mass flow, and
subsequently diagnosing, via an electronic control device, the at least one exhaust gas sensor (22;24;26) disposed in the exhaust duct (21).