Patent ID: 8245499

Claim:
A system for increasing a temperature of an exhaust gas of an internal combustion engine, comprising: at least one exhaust gas aftertreatment device coupled downstream of the engine; an exhaust gas recirculation system comprising: an exhaust gas recirculation valve; an exhaust gas recirculation line coupling the exhaust to an intake of the engine; and a regulating system for controlling an exhaust gas back-pressure coupled in the exhaust gas downstream of the exhaust gas recirculation line; and a control device for increasing said exhaust gas back-pressure while maintaining a substantially constant exhaust gas recirculation rate, said control device increasing a fuel injection quantity into a combustion chamber of the engine during a main injection event, wherein said control device defers said main injection event to a later time if a required exhaust gas temperature is not achieved, and wherein said regulating system comprises: a flap valve integrated into an engine exhaust tract; and a bypass tract for bypassing the area of the flap valve, said bypass tract having a bypass valve incorporated in it, wherein the degrees of opening of the exhaust gas recirculation valve, the flap valve and the bypass valve are jointly controlled so that a desired exhaust gas back-pressure setting and a desired exhaust gas recirculation rate setting are achieved.