Charged spark-ignition internal combustion engine with knock control and method for operating such an internal combustion engine

摘要

A supercharged spark-ignition internal combustion engine with - at least one cylinder head with at least one cylinder, each cylinder having at least two inlet openings for supplying charge air and at least one outlet opening for discharging the exhaust gases, - at least one throttle valve disposed in the intake system, - at least one exhaust gas turbocharger, and - A knock control, which provides a necessary to avoid knock Zündspätverstellung Δignition as an output signal and provides, in which - at least two at least partially variable valve trains are provided with at least two valves which are movable between a valve closed position and a valve open position to the at least two To open or obstruct inlet openings of the at least one cylinder, with valve spring means to bias the valves in the direction of valve closing position, and with at least two actuators to the valves en open against the biasing force of the valve spring means, each actuator comprises a arranged on a camshaft cam, which is engageable with at least one cam follower element in circumferential cam, whereby the associated valve is actuated, and the cams of the at least two actuators of the at least two at least partially variable valve trains are rotatable relative to each other, and - each cylinder has a geometric compression ratio εgeo ≥ 11.