Voltage maintenance system

Electrical transmission or interconnection systems – Vehicle mounted systems

Patent

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Details

1231793, 307 23, 440 1, 440 85, B60L 100, H02J 734, F02N 1700, B63H 2122

Patent

active

052218619

ABSTRACT:
A voltage maintenance system is provided for an engine-driven vehicle having a primary battery, a starter that is energized by the primary battery, an ignition switch for selectively and momentarily activating the starter to start the engine and one or more electrical accessories that are electrically connected to and energized by the primary battery during normal operation of the vehicle. The voltage maintenance system includes a secondary battery. The system senses activation and subsequent de-activation of the starter each time the engine is started. A switching circuit is provided for electrically connecting the secondary battery to the electrical accessories and electrically isolating the primary battery from the electrical accessories such that the secondary battery energizes the electrical accessories each time activation of the starter is sensed. The switching circuit also electrically disconnects the secondary battery from the electrical accessories and electrically reconnects the primary battery to the electrical accessories when the starter is subsequently deactivated.

REFERENCES:
patent: 2729750 (1956-01-01), Draper et al.
patent: 3340402 (1967-09-01), Curtis
patent: 3753001 (1973-08-01), Hiroshima et al.
patent: 4127782 (1978-11-01), Omura et al.
patent: 4489242 (1984-12-01), Worst
patent: 4754730 (1988-07-01), Campagna
patent: 4780618 (1988-10-01), Wareman et al.
patent: 5136179 (1992-08-01), Kanno

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