Motor Vehicle Supply System Comprising a Voltage Transformer
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Abstract
The present invention relates to a motor vehicle electrical system, comprising a generator, a battery, a starter and a high-capacity capacitor for storing electric energy for the starting process of a motor vehicle engine. The electrical system further comprises a voltage transformer and an interrupter which are connected in parallel between the capacitor and the battery and are controlled for preparing a starting process of the motor vehicle engine in such a way that the voltage transformer transforms the voltage of the battery into a larger voltage and the interrupter interrupts the electrical connection between the battery and the capacitor.
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Citations
39 Claims
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1-19. -19. (canceled)
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20. A motor vehicle electrical system, comprising:
- a generator, a battery, a starter and a high-capacity capacitor for storing electric energy for the starting process of a motor vehicle engine, a voltage transformer and an interrupter which are connected in parallel between the capacitor and the battery and which are controlled for preparing a starting process of the motor vehicle engine in such a way that the voltage transformer transforms the voltage (UBatt) of the battery into a larger voltage and the interrupter interrupts the electrical connection between the battery and the capacitor.
- View Dependent Claims (21, 22, 23, 24, 25, 26, 28, 29, 30)
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27. A motor vehicle electrical system according to claim 27, wherein the control unit activates the voltage transformer and opens the interrupter upon the detection of the ignition key position “
- ignition ON”
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- ignition ON”
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31. A method for starting a motor vehicle engine with a motor vehicle electrical system, comprising a generator, a battery, a starter and a high-capacity capacitor for storing electric energy for the starting process of the motor vehicle engine, the method comprising:
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detecting an imminent starting process during which the motor vehicle engine is put into operation by means of the starter, charging the high-capacity capacitor, wherein an electrical connection between the battery and the high-capacity capacitor is interrupted, and the voltage (UBatt) of the battery is transformed by a voltage transformer into a higher voltage, and supplying the starter with energy from the high-capacity capacitor for starting the motor vehicle engine. - View Dependent Claims (32, 33, 35, 36, 37, 38, 39)
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Specification