Process for controlling an exhaust gas purification system of IC engine comprises controlling an operating parameter of the engine and/or at least one instrument of the exhaust gas

摘要

Process for controlling exhaust gas purification system in IC engine (10) comprises acquiring signal dependent on concentration of components with measuring device (22) sensitive to sulfur-containing components; determining concentration of component(s) in exhaust gas from signal; and controlling operating parameter of engine and/or instrument(s) of exhaust gas purification system depending on concentration of sulfur-containing component. An Independent claim is also included for a device for controlling an exhaust gas purification system of an IC engine. Preferred Features: The sulfur-containing component is sulfur dioxide and/or hydrogen sulfide. The signal depending on the sulfur-containing component is acquired upstream of an instrument of the exhaust gas purification system. The measuring device is arranged in an exhaust gas tract (12) or in a by-pass (24) of the tract. A thermostat (26) is assigned to the bypass.