Abstract: A method for monitoring an actuator device of a reciprocating piston engine, wherein the actuator device is designed to actuate, particularly reversibly displace, a sliding cam device of the reciprocating piston engine, particularly substantially parallel to a camshaft of the reciprocating piston engine, with the steps S1 Feeding of actuation energy to the actuator device, whereupon the actuator device undergoes a first state change, S2 Monitoring of the actuator device and detection of a second state change of the actuator device, S3 Determining of a first angle of rotation ? of a camshaft or of the camshaft of the reciprocating piston engine on the basis of the second state change.

Abstract: A method for assessing the status of an electromechanical actuator device is disclosed. The actuator device is provided for actuating control element apparatuses in an internal combustion engine for a motor vehicle. This actuator device has an activation apparatus and a stator apparatus as well as at least one electrical coil apparatus. The actuator device can be changed over from a first operating state into a second operating state. During the changeover, activation power is fed to the coil apparatus by a control line apparatus. In the method, the activation power is fed to the actuator device, the feeding of the activation power is reduced, and the control line apparatus is monitored and an actuator assessment characteristic variable is determined from the data acquired in the process. Furthermore, the actuator assessment characteristic variable is assessed by a comparison variable which is based on the fed-in activation power.

Abstract: A method for monitoring an actuator device of a reciprocating piston engine, wherein the actuator device is designed to actuate, particularly reversibly displace, a sliding cam device of the reciprocating piston engine, particularly substantially parallel to a camshaft of the reciprocating piston engine, with the steps S1 Feeding of actuation energy to the actuator device, whereupon the actuator device undergoes a first state change, S2 Monitoring of the actuator device and detection of a second state change of the actuator device, S3 Determining of a first angle of rotation ? of a camshaft or of the cam shaft of the reciprocating piston engine on the basis of the second state change.

Abstract: Method for assessing the status of an electromechanical actuator device. The actuator device is provided, in particular, for actuating control element apparatuses in an internal combustion engine for a motor vehicle. This actuator device has an activation apparatus and a stator apparatus as well as at least one electrical coil apparatus 1. The actuator device can be changed over from a first operating state into a second operating state. During the changeover from this first operating state into this second operating state, activation power 2 is fed to the coil apparatus 1 by means of a control line apparatus. In a first method step, the activation power is fed to the actuator device. In a second method step, the feeding of the activation power is reduced, in particular interrupted. In a third method step, the control line apparatus is monitored and an actuator assessment characteristic variable is determined from the data acquired in the process.