Abstract: A cylinder head for an internal combustion engine is provided, whereby the cylinder head has a cylinder head gasket region for closing a combustion chamber with a diameter. The cylinder head includes the following: a. two intake holes for receiving one intake valve each; b. two outlet holes for receiving one outlet valve each; and c. a spark plug sleeve hole for receiving a spark plug sleeve. The at least one intake hole of the two intake holes has a diameter between 34.0% and 36.6% of the diameter of the combustion chamber, preferably a diameter between 34.5% and 35.9% of the diameter of the combustion chamber, and particularly preferably a diameter between 34.8% and 35.5% of the diameter of the combustion chamber. The at least one outlet hole has a diameter that, in relation to the diameter of the combustion chamber, is at least 1% smaller than the diameter of the intake holes.

Abstract: To enable testing of a starter motor on a test bench with an electrical dynamometer as a replacement for a real combustion engine, a simulation unit (20) is used in which a mathematical model of the combustion engine is implemented, and the simulation unit (20) determines a new load setpoint (ns, Ts) using the mathematical model from measured actual values (?i, ni, Ti) of the operation of the electrical dynamometer (3) at every scanning time point of a regulation, which new load setpoint (ns, Ts) is fed to the regulator (21) of the electrical dynamometer.

Abstract: To enable testing of a starter motor on a test beach with an electrical dynamometer as a replacement for the real combustion engine, a simulation unit (20) is provided in which a mathematical model of the combustion engine is implemented, and the simulation unit (20) determines a new load setpoint (ns, Ts) using the mathematical model from measured actual values (?i, ni, Ti) of the operation of the electrical dynamometer (3) at every scanning time point of the regulation, which new load setpoint (ns, Ts) is fed to the regulator (21).