Method for driving actuators
AssigneeRobert Bosch GmbH
InventorsHermann Gaessler, Juergen Schiemann
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Abstract
A method for driving a plurality of actuators having an output stage having multiple channels, by way of whose channels boost currents are conveyed to the actuators. In this method, a check is made as to whether rising edges of multiple boost currents are present simultaneously (rising edge collision). Upon the identification of simultaneously present rising edges, at least one of the boost currents is conveyed in time-offset fashion to the associated actuator.
Claims12
A method for driving a plurality of actuators comprising an output stage having multiple channels, by way of whose channels boost currents are each conveyed to an associated actuator comprising:
- checking as to whether rising edges of multiple boost currents are present simultaneously;
- upon identifying simultaneously present rising edges, conveying at least one of the boost currents in time-offset fashion to the associated actuator;
- and
- checking as to whether simultaneous conveyance of a plurality of boost currents results in an impermissible load on a device;
- wherein time-offset conveyance of boost currents to the associated actuators only if a defined load limit is exceeded by the simultaneous conveyance of the plurality of boost currents.
A method for driving a plurality of actuators comprising an output stage having multiple channels, by way of whose channels boost currents are each conveyed to an associated actuator comprising:
- checking as to whether rising edges of multiple boost currents are present simultaneously;
- upon identifying simultaneously present rising edges, conveying at least one of the boost currents in time-offset fashion to the associated actuator;
- checking as to whether simultaneous conveyance of a plurality of boost currents results in an impermissible load on a device,
- wherein time-offset conveyance of boost currents to the associated actuators only if a defined load limit is exceeded by the simultaneous conveyance of the plurality of boost currents;
- defining a load limit;
- and
- prior to the conveyance of the boost currents to the actuators, checking as to whether the defined load limit will be exceeded;
- wherein the conveyance of boost currents to the actuators is accomplished in equalized or time-offset fashion in such a way that the defined load limit is not exceeded.
A method for driving a plurality of actuators comprising an output stage having multiple channels, by way of whose channels boost currents are each conveyed to an associated actuator comprising:
- checking as to whether rising edges of multiple boost currents are present simultaneously;
- and
- upon identifying simultaneously present rising edges, conveying at least one of the boost currents in time-offset fashion to the associated actuator, wherein a sum of the boost currents conveyed simultaneously in a definable time interval is dimensioned in such a way that a definable limit value of the total current is not exceeded.
Dependencies are inferred from the claim text.