Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle subsystem or accessory control
Patent
1998-06-30
2000-02-29
Chin, Gary
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle subsystem or accessory control
701 43, 180443, 180446, B26D 504
Patent
active
060320915
ABSTRACT:
An electric power steering apparatus having a control unit for controlling a motor for applying an assist torque to a steering system on the basis of a steering torque of the steering system. The control unit has a drive signal fading part for generating a drive current signal on the basis of a deviation signal expressing the deviation between a target current set in correspondence with a steering torque and a detected motor current detected by a motor current detector and gradually decreasing a drive current value with time to zero when a fadeout request signal is supplied to it. Thus in an electric power steering apparatus constructed to gradually decrease a steering assist force being supplied from a motor when an ignition switch is turned off, even if an error arises in a detected motor current value as a result of a fall in the voltage of a battery power supply, the steering assist force can be decreased correctly.
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patent: 5912539 (1999-06-01), Sugitani et al.
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patent: 5927430 (1999-07-01), Mukai et al.
Mukai Yoshinobu
Noro Yoshiki
Chin Gary
Honda Giken Kogyo Kabushiki Kaisha
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