| 摘要 |
The invention relates to a method for operating an internal combustion engine (2) comprising an exhaust gas purification unit (1), wherein the exhaust gas purification unit (1) comprises one catalytic converter (4) through which an exhaust gas flow of the internal combustion engine (2) can flow and a first lambda probe (5) arranged upstream the catalytic converter (4) in the exhaust gas flow and a second lambda probe (6) arranged downstream the catalytic converter (4) in the exhaust gas flow. According to the invention an oxygen filling state of an oxygen storage of the catalytic converter (4) is determined on the basis of a first lambda signal provided by the first lambda probe (5) and an offset value (&Dgr;λ), and is set to a first value corresponding to an empty oxygen storage by a second lambda signal provided by the second lambda probe (6) when a lambda signal lower threshold is undercut and/or set to a corresponding second value by the second lambda signal corresponding to a full oxygen reservoir when a lambda signal upper threshold is exceeded and directly afterwards regulated during at least one indicative time period to a full oxygen reservoir, wherein at the end of the indicative time period the offset value (&Dgr;λ) is adapted on the basis of the second lambda signal. The invention further relates to an internal combustion engine (2). |
