Electricity: motive power systems – Plural diverse motor controls – Motor-reversing
Patent
1991-11-07
1993-09-14
Ro, Bentsu
Electricity: motive power systems
Plural diverse motor controls
Motor-reversing
318 10, 318466, E05F 1516
Patent
active
052452581
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
The invention relates to a power window unit. The prior art includes electrically powered power window units for raising and lowering the windows of a motor vehicle; these electrically powered power window units are suitable for installation in the doors of motor vehicles and have either an electric motor connected to a transmission or a geared motor as the drive unit, which can be connected to the motor vehicle battery via a switch.
The window, which is mounted in the vehicle door and can be raised or lowered by an electrically powered power window unit, is fastened at its lower edge to a guide carriage slide which can be moved up or down along a profiled rail by means of an closed cable loop, for example. The cable loop goes around a cable drum, which can, for example, be driven by a worm gear transmission by the electric motor in a compact drive unit, which includes the cable drum in addition to the worm gear transmission and the electric motor and is fastened to the supporting surfaces on the inside of the vehicle door or a base plate as well as to the profiled rail.
As an alternative, the drive unit can be used to operate a cross arm window lifter.
Because different forces are necessary to raise and lower the window, the drive unit has an electronic control and regulating system, which is connected to an operating switch, and can also be equipped with a speed sensor. Depending on the position and way the operating switch is used, the window is completely raised, completely lowered or held in a desired intermediate position, whereby the electronic control and regulating system ensures a smooth raising or lowering procedure.
A configuration of the prior art for an electrically powered power window unit and an electronic control and regulating system in a motor vehicle door is schematically illustrated in FIG. 1.
The drive unit for this configuration of the prior art consists of a geared motor 2 with an electric motor 21 and a connected transmission 22, which is connected by means not shown here to the cable loop for raising and lowering the window. The rotor shaft 23 is mechanically coupled to a speed sensor 3, which is connected via a conducting cable to the electronic control and regulating system 4 located in a separate housing. The electronic control and regulating system 4 is connected to the power supply of the electric motor 21 via a line 41 and a plug-in contact 24. A line 42 leads to the operating switch in the interior of the vehicle via a plug connector as well as to the motor vehicle battery 45 via a line 44.
As seen in the configuration diagrammed schematically in FIG. 1, the drive unit 2 and the electronic control and regulating system 4 are in separate housings, which must be essentially impervious to moisture; i.e. water vapor which develops must be able to leave the system while liquid. Rain water in particular must not be able to enter through the membrane. Between the separate housings, several cable connections are necessary, for the power supply of the electric motor 21, and for speed measurement for the connection between speed sensor 3 and the electronic control and regulating system 4. The plug-in contacts 24, 43, like the housing to hold the drive unit 2 and the electronic control and regulating system 4 must be impervious to moisture in order to prevent short circuits.
The separate placement of the drive unit 2 and the electronic regulating system 4 thus requires high assembly costs and substantial expenditures for cable connections between the two housings as well as the configuration of moisture tight plugs and jacks. There is a risk that mistakes will be made during establishment of the cable connections between the two housings which results in high overall costs for the installation of the electrically powered power window unit.
An additional problem is that the cables 40, 41, 42 between the separate housings to hold the electronic control and regulating system on one hand and the drive unit on the other hand in the vehicle door move when there is a high degre
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patent: 4459518 (1984-07-01), Chevallier
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patent: 4857812 (1989-08-01), Mochizuki et al.
patent: 4922171 (1990-05-01), Ohi
Becker Herbert
Brandt Carsten
Freisleben Bernd
Jurgens Gerhard
Kurzendorfer Reiner
Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft
Ro Bentsu
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