Internal combustion engine e.g. charged internal combustion engine, comprises one cylinder with reciprocating piston and two intake valves per cylinder as well as roof-shaped combustion chamber cover area in cylinder head

摘要

Internal combustion engine, e.g. a charged internal combustion engine, comprises one cylinder with a reciprocating piston and two intake valves per cylinder as well as a roof-shaped combustion chamber cover area (8) in the cylinder head (1). The intake ducts (2) extending to the intake valves generate a tumble flow in the combustion chamber (5). The main directions of flow of the partial flows that are sucked into the combustion chamber through the intake valves respectively enclosing an acute angle (f) together with a longitudinal plane is determined by the cylinder axes of a cylinder bank. The inventive internal combustion engine further comprises at least one discharge duct (3) per cylinder. In order to reduce fuel consumption, the tumble rate ranges between 1.2 and 2, preferably between 1.4 and 1.9. Independent claims are also included for the following: (1) Method for operating internal-combustion engine; (2) Internal-Combustion engine with turbocharger; (3) Method for describing an internal-combustion engine; (4) Turbocharger; and (5) Cylinder head.