Motor vehicles – Steering gear – With electric power assist
Reexamination Certificate
2009-05-04
2011-11-08
Boehler, Anne Marie (Department: 3611)
Motor vehicles
Steering gear
With electric power assist
C180S443000
Reexamination Certificate
active
08051945
ABSTRACT:
An electric power steering system for a vehicle includes a motor for providing assistance in turning the wheels of the vehicle. The motor is electrically connected to a controller. The controller includes a power device, such as a power transistor, electrically connected to the motor to variably provide electric power to the motor as needed. The controller also includes a gate drive device electrically connected to the power device for regulating operation the power device. A shutdown mechanism is electrically connected between the gate drive device and a power input. In the event of a fault, the shutdown mechanism isolates electrical power from the gate drive device. This prevents the power device from providing electric power to the power steering motor.
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European Search Report and Office Action dated Sep. 3, 2009 for European Application No. 09160172.4.
Collier-Hallman Steven J.
Shafer Daniel W.
Boehler Anne Marie
Cantor & Colburn LLP
Nexteer (Beijing) Technology Co., Ltd.
Stabley Michael
LandOfFree
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