Robert Boschgmbh

Other

Rolf Mack

Stefan Koch

Christian Meyer

Ingo Drewe

Joerg Aschoff

Dieter Fornoff

Michael Schindler

Oliver Amendt

An electronically commutatable motor, in particular for a fluid pump, includes excitation windings that may be connected to and disconnected from a DC supply voltage via semiconductor switches that are controlled by control signals of a commutation device. Additional closed- and/or open-loop control of the output of the motor, is obtained with a temperature protection system in that the control signals of the commutation device are clocked by pulse width modulatable output signals of a PWM generator and in that the pulse width ratio of the output signals of the PWM generator may additionally be modified as a function of the output signal of the temperature sensor.

Electronically commutable motor, in particular, for a liquid pump

The invention is based on a device for actuating a clutch ( ), in particular for motor-vehicle drives, having an electronically controllable clutch servo unit ( ) that comprises an electric motor ( ) and a reduction actuator gear ( ) having two gear elements arranged coaxially in relation to each other ( and/or and/or ) that are interconnected with each other in terms of propulsion via a thread ( ) and that are displaced axially in relation to each other when they rotate relative to one another, whereby one of the gear elements ( ) is immobilized axially in a housing ( ) of the clutch servo unit, and the actuating motion of the other gear element ( ) is transferred to a throwout bearing ( ) of a clutch disk. It is proposed that the gear element ( ) that is axially displaceable relative to the housing ( ) is interconnected via a longitudinal guide ( ) with a rotor ( ) or a motor shaft ( ) of the electric motor ( ) in a fashion that is torsion-resistant but axially displaceable, and acts on the throwout bearing ( ) via an actuator ( ).

Device for operating a clutch

A motor vehicle with an automated clutch in its drive train has a clutch control device for controlling the automated clutch and at least a further control device. The clutch control device and the further control device can be activated by means of an activation element which, when the ignition is switched on, sends an ignition signal V to the clutch control device and to the further control device. The clutch control device is or remains activated if at least one of the ignition signal V and an activity signal of the further control device is present.

Device for authorizing an unrestricted operating mode of a vehicle control device in the event of a failure of the ignition signal

The electric motor drive includes an electric motor (,); an end stage (,) for triggering the electric motor; a trigger circuit (,) for pulse-width-modulated triggering of the end stage, which is associated with the end stage (,) and which includes an overload stage (,) for detecting an overload on the electrical motor according to a temperature of the electric motor and a device for obtaining a temperature from a pulse-width-modulation signal (,) generated by the trigger circuit (,). A preferred embodiment includes a device for integrating a differential power (P,) equal to an instantaneous power (P,) minus an equipment specific limit power (P,) in predetermined time intervals to obtain an integrated power (P,). The motor is turned on or off by comparison of the integrated power with various limiting values.

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Sinzheim, Germany

Rolf Mack