Charged spark-ignition internal combustion engine with exhaust aftertreatment and method for operating such an internal combustion engine

摘要

The invention relates to a spark-ignited three-cylinder in-line engine (10), in the each cylinder (1) has at least one inlet opening (2a, 2b) and at least two outlet openings (4a, 4b), an exhaust-gas turbocharger (8) is provided which comprises a turbine (8a) arranged in the exhaust-gas removal system (5) and a compressor (8b) arranged in the intake system (3), - The exhaust pipes (5a, 5b) of the outlet openings (4a, 4b) form two groups, each group comprises at least one exhaust pipe (5a, 5b) of each cylinder (1) and the exhaust pipes (5a, 5b) of each group to one Merge the entire exhaust line (6a, 6b), - The first total exhaust line (6a) of a first group in the turbine (8a) opens, and - The second total exhaust line (6b) of a second group in the intake system (3) opens upstream of the compressor (8b). It is an internal combustion engine (10) are provided, which is improved in terms of exhaust aftertreatment. This object is achieved by an internal combustion engine (10), which is characterized in that - means (13) are provided, with which a discharge of exhaust gas via the first overall exhaust line (6a) can be prevented, and - A blow-off line (7) is provided, which branches off from the exhaust manifold of the second group and downstream of the turbine (8a) in the Abgasabführsystem (5) opens, wherein in the blow-off line (7) is provided a memory (12) for unburned hydrocarbons.