Auto-ignition and suitable for HCCI operation internal combustion engine and method for operating such an internal combustion engine

摘要

The invention relates to a self-igniting internal combustion engine (1) with an exhaust gas recirculation (11), an intake system (2) for supplying the internal combustion engine (1) with charge air and a Abgasabführsystem (3) for discharging the exhaust gases, at least also according to a first operating mode by Raumzündverfahren (HCCI mode) is operable. It is intended to provide a self-igniting internal combustion engine of the type mentioned, which is improved in terms of operation in the HCCI mode, in particular with regard to the exhaust gas aftertreatment or with regard to the pollutant emissions. This is achieved by a self-igniting internal combustion engine, which is characterized in that for after-treatment of the exhaust gas in the stoichiometric first mode of operation, a three-way catalyst (7) in the Abgasabführsystem (3) is provided which reduces nitrogen oxides and oxidized unburned hydrocarbons and carbon monoxide.