Road load insensitive electric power steering system

Details Road load insensitive electric power steering system Road load insensitive electric power steering system

B - Operations, Transporting

62

D

342/32

B62D 5/04 (2006.01)

Patent

CA 1216345

ROAD LOAD INSENSITIVE ELECTRIC POWER STEERING SYSTEM Abstract of the Disclosure The torque gain of an electric motor assisted power steering system is modified as a function of the estimated level of road load fric- tion such that the relationship between the operator exerted steering torque and the resulting rate of steer is substantially insensitive to a reduction in the level of road load. The road load is esti- mated as a function of the operator exerted steering torque, the torque assist provided by the electric motor, and the resulting steer rate.

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