Patent ID: 8091339

Claim:
A method for operating an air-compressing fuel-injection internal combustion engine having an exhaust gas post-treatment system that includes a particle filter and a nitrogen oxide reduction catalytic converter, wherein said method includes provisions for a plurality of internal combustion engine operating settings, with respective predefined values for predefined internal combustion engine operating parameters, said method comprising: when the internal combustion engine is warming up, setting a heating operating setting; wherein, when the internal combustion engine is in a warmed-up state, setting a basic operating setting; and when the temperature in the exhaust gas post-treatment system exceeds a predefinable first threshold value, changing from the heating operating setting to the basic operating setting; when the internal combustion engine is in the warmed-up state, at least a third operating setting, with an exhaust gas recirculation rate that is reduced compared to the basic operating setting, can be set, in addition to the basic operating setting; and when the heating operating setting is active and the temperature in the exhaust gas post-treatment system exceeds a predefinable second threshold value, a separate fuel post-injection is activated.