Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle subsystem or accessory control
Reexamination Certificate
2005-05-24
2005-05-24
Black, Thomas G. (Department: 3663)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle subsystem or accessory control
C701S035000, C701S114000, C180S197000, C340S616000, C123S406470, C123S478000
Reexamination Certificate
active
06898499
ABSTRACT:
A control system enables a considerable decrease in electric power consumption of backup power, leading to effective prevention of a dead battery, while data in each control unit which need be maintained even after power is turned off is properly maintained. An ECU has a first transmitter to transmit data which need be maintained to an ECU for storage when a change in position of an IGSW connected to a battery to the off position is detected, and a power supply cutoff circuit to cut off the power supply to the other ECUs after the completion of the transmission of data to the ECU for storage by the first transmitter, wherein the ECU for storage has a first storage controller to store the data transmitted from the other ECUs in RAM, and a power switching circuit to detect the change of the IGSW to the off position and switch the power of the ECU for storage to the backup power.
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JP 05-060953 translation of claim 1.
Arita Hiroshi
Kimura Shuuji
Black Thomas G.
Fujitsu Ten Limited
Mancho Ronnie
Wenderoth , Lind & Ponack, L.L.P.
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