An electric power steering system, comprising: a steering wheel in operable communication
with a mechanical linkage; a steering shaft in operable communication with the
mechanical linkage, and in operable communication with at least one road wheel;
a first transmission in operable communication with the steering shaft; a unidirectional
electric motor in operable communication with the first transmission; wherein the
electric power steering system is configured such that when the steering wheel
is turned in a first direction, the motor's power is transmitted in the first direction
to the steering shaft, and when the steering wheel is turned in a second direction,
the motor's power is transmitted in the second direction to the steering shaft.
A method for providing power assist for an electric power steering system, the
method comprising: rotating a first body in a first direction with a unidirectional
motor; rotating a second body in a second direction with the unidirectional motor;
providing a power assist from the first body when a steering wheel is turned in
a first direction; and providing a power assist from the second body when a steering
wheel is turned in a second direction.