Andreas Holzeder

Verfahren zum Betreiben eines Abgasnachbehandlungssystems mit wenigstens einer ersten SCR-Einrichtung und wenigstens einer zweiten SCR-Einrichtung

SCR CATALYST SYSTEM AND METHOD FOR THE OPERATION THEREOF

SCR-Katalysatorsystem und Verfahren zu seinem Betrieb

Method for diagnosing selective catalytic reduction-catalyst system for reducing nitrogen oxides in exhaust gas of e.g. diesel engine of motor car, involves determining aging state of catalyzer from difference between sensor signals

Method for checking cross-sensitivity of ammonia of nitrogen oxide sensor in SCR catalyst system of diesel engine, involves determining nitrogen oxide concentration in exhaust gas between catalysts from nitrogen oxide model

Method for checking nitrogen oxide sensor in SCR catalyst system, involves introducing reducing agent into exhaust line upstream of catalyst for checking nitrogen oxide sensor, and avoiding ammonia slippage from catalyst

Method for checking SCR catalysts in exhaust gas system of internal combustion engine of motor car, involves altering size of ammonia sensor to output signal to ammonium cross-sensitive sensor, which is attenuated below threshold level

METHOD FOR OPERATING AN EXHAUST GAS AFTERTREATMENT SYSTEM WITH AT LEAST ONE FIRST SCR DEVICE AND AT LEAST ONE SECOND SCR DEVICE

Method for determining nitrogen oxide concentration in exhaust flow path of diesel engine of motor car, involves determining nitrogen oxide concentration depending on nitrogen oxide sensor signal and modeled value

Method for checking cross sensitivity of ammonia in SCR catalyst system of diesel engine of motor car, involves recognizing fault of nitrogen oxide sensor in predetermined period according to increase in temperature of catalyst