Method for controlling an electric power steering system

Details Method for controlling an electric power steering system Method for controlling an electric power steering system

2008-07-15

2008-07-15

Morris, Lesley D. (Department: 3611)

Motor vehicles

Steering gear

With electric power assist

C701S041000, C701S042000

Reexamination Certificate

active

07398854

ABSTRACT:
A method for controlling an electrical power steering system for a vehicle includes an electrical servomotor, a steering device for entering a reference value (θS) of a steering angle into a control andlor regulation device, a moment sensor and an angle sensor for the steering device, a device for estimating the moment (Mv) at the steering device and an angle sensor for determining the angle (θA) of a power take-off of the electrical servomotor. In order to control the electrical power steering system, which makes a non-critical behavior possible in the event of a malfunction or failure of a moment sensor at the steering device, provisions are made so that an offset value (Δθ) is constantly formed from the reference value (δS) of the steering angle and the actual value θIof the steering angle, and a virtual moment (Mv) of the steering device is determined on the basis of the offset value (Δθ) and is used to control the electrical servomotor.

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patent: 2003112648 (2003-04-01), None

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