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AssigneeWebasto Karosseriesysteme GmbH
InventorsUlrich Henschel, Claus Vordermaier
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An actuation device for motor vehicle parts that are movable by an electric motor, in particular for window regulators and sliding roofs that are driven by a reversible electric motor. This actuation device has a setpoint value device for the desired position of the movable part, an incremental actual-value device for producing a signal corresponding to the actual position of the movable part, an absolute actual value device which emits first and second signals that are positionally fixed relative to the incremental actual-value device, and a microprocessor to compare the setpoint and actual value signals and to perform control and regulation programs. The signal emitted by the absolute actual-value device changes only at predetermined position values and the absolute actual-value device has position zones which are separated from one another by these position values that can be predetermined. The first and last position zones are each defined by a first or second end position of the movable part. The absolute actual-value device has at least five separate position zones and emits the first signal in the first and last position zone, and the first and last position zone are wider than all other position zones in which the absolute actual value device emits the first signal.
Actuation device for motor vehicle parts which are movable by a reversible electric motor, comprising a setpoint value device for setting a setpoint value which corresponds to a desired position of a movable part, an first actual-value means for producing an actual value signal which corresponds to the actual position of the movable part at each of a series of incremental positions along a path of movement of the movable part, a second actual-value means for emitting a first signal and a second signal which are positionally fixed relative to the signal of the first actual-value means and which change only at predetermined positions which separate predetermined position zones, a first and last position of which correspond to a first and second end position of the movable part and between which an intermediate zone containing a home position for return movement of the movable part from said end positions is located, and a microprocessor means for comparing the setpoint value and the actual value signal and for performing control and regulation programs wherein:
Dependencies are inferred from the claim text.