METHOD FOR IDENTIFYING REACTIVE GAS CONSTITUENTS IN THE EXHAUST GAS OF AN INTERNAL COMBUSTION ENGINE

摘要

The invention relates to a method for identifying reactive gas constituents in the exhaust gas of an internal combustion engine having a number of cylinders, involving the following steps: detecting the temporal progression of at least one characteristic engine operating parameter, which cyclically fluctuates according to the firing order of the cylinders, during at least one first window of time; differentiating the progression of the characteristic engine operating parameter according to the involved cylinders; detecting the temporal progression of the temperature or of the thermal radiation on at least one exhaust subsequent treatment device, which is formed by a catalytic converter, during at least one second window of time correlated with the first window of time; determining whether the temporal progression of the temperature has at least one temperature peak; assigning the point in time of the occurrence of the temperature peak to a point in time of causation in the temporal progression of the characteristic engine parameter, and; assigning the point in time of causation of the temperature peak to at least one causing cylinder.