Steering control system

Details Steering control system Steering control system

2006-07-12

2009-06-02

Dickson, Paul N (Department: 3611)

Motor vehicles

Steering gear

With electric power assist

C180S443000, C180S444000, C701S041000, C701S042000, C701S043000

Reexamination Certificate

active

07540351

ABSTRACT:
A steering control system includes a steering wheel and a steering shaft with upper and lower shaft portions. Steering shaft torque of the lower shaft portion corresponds to torque transmitted to the upper shaft portion, and steering shaft torque steers vehicle wheels. A steering torque detector is included for detecting steering torque. An assist force generating device generates assist forces according to a control signal to thereby generate torque in the lower shaft portion. A controller is included for outputting the control signal based upon the steering torque. A vehicle speed detector detects speed of the vehicle, and an environment information detector detects environment information. A basic assist amount is set according to the vehicle speed and the steering torque, and a torque correction amount is determined based upon the environment information. Additionally, the assist force is determined based upon the basic assist amount and the torque correction amount.

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