METHOD AND DEVICE FOR DETERMINING THE OXYGEN STORAGE CAPACITY OF THE EXHAUST GAS CATALYTIC CONVERTER OF AN INTERNAL COMBUSTION ENGINE, AND METHOD AND DEVICE FOR DETERMINING A DYNAMIC TIME DURATION FOR EXHAUST GAS PROBES OF AN INTERNAL COMBUSTION ENGINE

摘要

According to the present invention, the exhaust gas catalytic converter has sufficient oxygen until the catalytic converter is saturated at least in front of the exhaust gas probe. The predefined first excess air / fuel ratio LAM1_SP is set in the combustion chamber of the cylinder. The first oxygen storage capacity value OSC1 is determined as a function of the measurement signal MS of the exhaust gas probe and the predefined first excess air / fuel ratio LAM1_SP. The exhaust gas catalytic converter has sufficient oxygen until the catalytic converter is saturated. A predefined second excess air / fuel ratio LAM2_SP is set in the combustion chamber of the cylinder. The second oxygen storage capacity value OSC2 is determined as a function of the measurement signal of the exhaust gas probe and the predefined second excess air / fuel ratio LAM2_SP. The corrected oxygen storage capacity value OSC_COR is determined as a function of the first and second oxygen storage capacity values OSC1, OSC2.