Exhaust gas treatment systems for exhaust gas devices of internal combustion engines, and methods for operating such exhaust gas treatment systems.

摘要

PROBLEM TO BE SOLVED: To provide an exhaust gas treatment system capable of improved adaptation of an internal combustion engine to various operating conditions. An exhaust gas treatment system for an exhaust gas device of an internal combustion engine includes a plurality of SCR catalyst units 32,34,36 connected in parallel to each other, and SCR catalyst units 32,34,36 connected in parallel to each other. At least one of the SCR catalyst units 32,34,36 can be selectively opened and blocked due to the passage by the exhaust gas. [Selection diagram] Fig. 1