Method for diagnosing exhaust gas probes and/or catalytic converters
AssigneeDr. Ing. h.c. F. Porsche Aktiengesellschaft
InventorsThomas Keller, Rainer Dostert
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Abstract
New operating phases of internal combustion engines, such as coasting in which the internal combustion engine is decoupled from the rest of the drive section, continuously decrease the number of phases in which there is an overrun mode of an internal combustion engine in which diagnoses of catalytic converters and exhaust gas probes are carried out. Also, a method wherein the diagnosis of the at least one exhaust gas probe and/or the at least one catalytic converter carried out during the coasting mode and, in particular, when the cylinder bank is switched off.
Claims19
A method for diagnosing exhaust gas probes and/or catalytic converters having at least one catalytic converter which is arranged in an exhaust gas duct of an internal combustion engine and an exhaust gas probe which is arranged in the exhaust gas duct, the function of which exhaust gas probe is checked, wherein the diagnosis of the at least one exhaust gas probe and/or of the at least one catalytic converter is carried out during the coasting mode.
Dependencies are inferred from the claim text.