Motor vehicles – Steering gear – With electric power assist
Reexamination Certificate
2006-03-17
2009-11-03
Morris, Lesley D (Department: 3611)
Motor vehicles
Steering gear
With electric power assist
C180S443000
Reexamination Certificate
active
07610990
ABSTRACT:
An on-vehicle motor control device includes a power switching circuit disposed on a circuit board to supply current from a battery to a motor, a microcomputer disposed on the same circuit board that controls the power switching circuit in a PWM control mode to minimize the difference between the current supplied to the motor and a preset current. The microcomputer decreases the preset current when the battery voltage is higher than an upper limit or when both the battery voltage and the voltage of the ignition key signal are higher than respective upper limits.
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Office Action dated Jul. 16, 2009 issued in corresponding Japanese Application No. 2005-099211 and an at least partial English translation thereof.
DENSO Corporation
Knutson Jacob
Morris Lesley D
Nixon & Vanderhye P.C.
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