Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Reexamination Certificate
2006-05-30
2006-05-30
Deberadinis, Robert L. (Department: 2836)
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
Reexamination Certificate
active
07053500
ABSTRACT:
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.
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patent: 6677725 (2004-01-01), Tamai et al.
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Canadian Patent Office Communication dated Feb. 18, 2004 in corresponding Application No. 2,413,560.
Furukawa Katsuhiko
Nakamura Yuuichi
Urushihara Keisuke
Deberadinis Robert L.
Honda Giken Kogyo Kabushiki Kaisha
Westerman, Hattori, Daniels & Adrian , LLP.
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