Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Patent
1983-11-07
1985-05-07
Pellinen, A. D.
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
361170, 180271, H02G 300
Patent
active
045160341
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a circuit for operating a displaceable component in a motor vehicle, in particular a motor vehicle window with at least one motor which is connected to a voltage source by means of an operating switch in conjunction with a relay contact.
In the known circuits of this type, i.e. for the electrical actuation of a motor vehicle window, the relay coil is disposed in a circuit which is closed when the ignition switch is turned on. Thereafter, the window can be opened or closed by actuating the operating switch, while during the time the ignition is turned off the window cannot be operated. This is advantageous in that the windows cannot be opened by children who are not supervised by the driver, but it is disadvantageous in that the driver can actuate the window only after the ignition has been switched on. If one notices, after leaving the car, that one or more windows have not been closed, one must again insert the ignition key and switch on the ignition before the window can be closed. The circuit can be changed in such a manner that the windows can be actuated even when the door is open, by providing a door contact switch which closes the circuit of the relay coil when the door is open. However, the danger exists with such an arrangement that the battery discharges overnight due to the power consumption of the relay coil, if one accidentally forgets to close the door. Furthermore, the relay coil would be constantly energized as long as the ignition is switched on, which very often results in an undesirable heat generation and a high power consumption. Finally the legal regulations in many countries forbids the actuation of the windows after the ignition, has been turned off after opening the driver door or after the opening and reclosing of the driver door.
OBJECTS AND SUMMARY OF THE INVENTION
It is therefore an object of the invention to provide a circuit which, on the one hand, permits an opening or closing of a motor vehicle window or another displaceable component, for example, a sliding roof, while the vehicle door is open or, depending on the legal regulations, until the opening of the driver door or while the driver door is open until the reclosing thereof while the ignition is turned off, but which, on the other hand, requires only such a low closed-circuit power consumption that even if the door is accidentally left open the battery will not be discharged and whereby an undesired heat generation and a high energy consumption is eliminated, while the ignition switch is on.
According to the invention, the circuit of the relay coil is closed only when either the ignition had been turned on or if a door contact had been actuated and while an operating switch is simultaneously switched on. Without actuating the operating switch a closed circuit current of less than 1 mA flows and when using CMOS-components with only a few microamps so that no discernible heat development can occur, whereby the power consumption is at minimum and whereby a discharge of the battery is prevented even in a circuit with door contact closed when the driver door is opened.
DESCRIPTION OF THE DRAWINGS
FIG. 1 shows an embodiment of the invention; and
FIG. 2 shows a second embodiment of the invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
In FIG. 1, M1 and M2 designate the motors of two motor vehicle windows in FIG. 1, wherein these motors are designed to either close or open an associated window depending on the direction of their rotation when an operating switch S1 or S2 is actuated. For the sake of simplicity, the switches S1 and S2 are illustrated as simple disconnecting switches, although in practice double-throw switches are used because of the necessity of reversing the poles of the motors. The operating switches S1 and S2 are disposed in series with a relay contact R which is connected to the positive pole of the vehicle battery. When the relay contact R is closed, motor M2 may be turned on by actuating switch S1 and motor M2 is turned on by activa
REFERENCES:
patent: 3997869 (1976-12-01), Mayer
patent: 4373149 (1983-02-01), Coste
patent: 4375610 (1980-03-01), Nagaoka et al.
Audi NSU Auto Union A.G.
Deboer Todd E.
Pellinen A. D.
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