Control unit and method for operating a hybrid drive

A controller for a hybrid drive which includes an internal combustion engine and an electric machine, wherein the internal combustion engine includes adjustment devices that deactivate an opening actuation of inlet valves and outlet valves, the controller comprising:

• a processor programmed to execute instructions;
• and
• a memory coupled to the processor and having the instructions stored therein, wherein the instructions are configured to cause the processor to:
• cause the adjustment devices to deactivate the opening actuation of the inlet valves and the outlet valves based on a determination that the internal combustion engine is non-activated, the internal combustion engine is connected to the electric machine via a closed clutch, and a specified condition of purely electric driving of the hybrid drive is present;
• wherein the controller provides fully variable valve stroke control on an inlet side and simple deactivation of a valve drive by a first switching actuator system on an outlet side;
• and
• wherein the controller is configured such that the inlet valves and the outlet valves are kept closed in a deactivated state only in a case in which a rotational speed of the internal combustion engine has not undershot a minimum rotational speed limit for self-sustained operation.