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AssigneeRobert Bosch GmbH
InventorsReinhard Gantenbein, Herbert Arnold
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A control circuit arrangement for controlling the after-running of an operating device in a motor vehicle is described, with which after shutting off the ignition the operating device is provided with voltage for a certain time interval by an associated voltage regulator and a switching means including a transistor. The shut off of the voltage provided to the operating device occurs by changing the input potential of the voltage regulator. Otherwise without the arrangement of the invention an external or internal relay is needed to switch off the voltage. In various embodiment the potential change at the control input of the voltage regulator can be controlled by electronic hardware devices or by a microprocessor under the control of software.
In a control circuit means for controlling the after-running of an operating device in a motor vehicle, said motor vehicle being provided with an ignition circuit and a battery, said control circuit means comprising a voltage regulator having a control input connected with a terminal of the ignition circuit, said voltage regulator providing a supply voltage of the operating device, the improvement comprising means for changing a potential at the control input of the voltage regulator to end the after-running of the operating device occurring after opening the ignition circuit, the means for changing the potential at the control input of the voltage regulator includes a source of potential of the motor vehicle and at least one resistor connecting electrically the source of potential and the control input so that a duration of the after-running depends on a control signal of the operating device, the source of potential is the motor vehicle power supply and the resistor connecting the power supply and the control input is selected so that the voltage regulator is kept in the turned on state, and means for switching off the after-running of the operating device includes a transistor (T1) having an emitter, collector and a base and wherein the base of the transistor (T1) is connected electrically to receive the control signal of the operating device to terminate the after-running by shifting the transistor (T1) into a blocking state.
In a control circuit means for controlling the after-running of an operating device in a motor vehicle, said motor vehicle being provided with an ignition circuit and a battery, said control circuit means comprising a voltage regulator having a control input connected with a terminal of the ignition circuit, said voltage regulator providing a supply voltage of the operating device, the improvement comprising means for changing a potential at the control input of the voltage regulator to end the after-running of the operating device occurring after opening the ignition circuit, the means for changing the potential at the control input of the voltage regulator including a source of potential of the motor vehicle and at least one resistor connecting electrically the source of potential and the control input so that a duration of the after-running depends on a control signal of the operating device;
Dependencies are inferred from the claim text.