CONTROL UNIT AND METHOD FOR MONITORING THE FUNCTION OF AN ELECTROMAGNETIC ACTUATOR

摘要

The invention relates to a method and to a control unit for monitoring the function of an electromagnetic actuator, for example, a control valve which can be blocked. A magnetic core which is arranged in the electromagnetic actuator can be moved by supplying current to an electric coil. In one step of the method, a current flowing through the coil which temporally varies is measured. In a further step, a temporal evaluation section of the path of the measured current is selected, in which the current changes from a section initial current value to a section end current value. The temporal evaluation section has a certain duration. An evaluation product is formed from factors which comprise at least the section initial current value and the section end current value as well as the duration of the section. According to the invention, an error function of the actuator is detected by comparing the evaluation product with an evaluation product limit.