B - Operations – Transporting – 60 – R
Patent
B - Operations, Transporting
60
R
B60R 16/04 (2006.01) B60L 1/02 (2006.01) B60L 3/00 (2006.01)
Patent
CA 2413560
An automotive electric power unit is provided to reduce the occurrence of electromagnetic noise caused by change in magnetic fields when the current dropps to zero when an ignition switch is being switched off. When the ignition switch is switched off, an input voltage to an ON/OFF control terminal of a DC/DC converter gently decreases through a potential difference between terminals of a motor driving load connected thereto. Accordingly, a control device, for which a detecting voltage is set relatively high, first detects an OFF state of the ignition switch and disconnects power loads such as a cooling fan, air conditioner, and defroster from the DC/DC converter by regulating relays. Then, the DC/DC converter, for which a detecting voltage is set lower than the detecting voltage for the control device, detects the OFF state of the ignition switch and stops stepping down the voltage so that a charging current for a battery of the load current thereof is shut off.
Furukawa Katsuhiko
Nakamura Yuuichi
Urushihara Keisuke
Honda Giken Kogyo Kabushiki Kaisha
Marks & Clerk
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