Robert Boschgmbh

Ingo Mueller-Vogt

Thomas Meier

Rupert Fackler

Willi Kuehn

Ewald Stuible

Christian Klein

Christian Schwientek

Bernd Gussmann

A transmission control module includes a printed circuit board. The circuit board has conductor tracks routed on at least one layer of the circuit board and configured to electrically connect a carrier substrate to electrical components. The circuit board has an inner conductor track layer arranged between two insulating layers. A first outer insulating layer, at least on a first side of the circuit board, has a recess. Surfaces of conductor track sections of conductor tracks of the at least one inner conductor track layer are arranged at the bottom of the recess. The carrier substrate is inserted into the recess and makes electrical contact with the surfaces of the conductor track sections. The recess is filled with a moulding compound which covers at least the carrier substrate and the conductor track sections to protect the carrier substrate and the conductor track sections from transmission fluid.

Transmission control module

A method for regulating the current through an electromagnetic actuator. The actuator, a first switch and a current-measuring circuit form a series circuit. A free-wheeling diode is parallel-connected to the actuator. The first switch is closed and opened by a control and a pulse generator using a PWM signal (PWM=pulse width modulation) in such a way that the current flowing through the actuator and measured by the current-measuring circuit is regulated to a setpoint value (SW). The time duration of one on and off switching cycle of the PWM signal is altered, and a so-called dither function in the form of a low-frequency oscillation is superimposed on the PWM signal.

Method for regulating the current through an electromagnetic actuator

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Unterriexingen, Germany

Ingo Mueller-Vogt