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Which advantage does electric power steering offer?

  • A.It consumes power only when assistance is required
  • B.A greater assistance force, which allows a heavier vehicle to be steered with a smaller effort at the wheel
  • C.Better feel
  • D.Simpler construction, since the motor replaces the pump, the reservoir, the pipework and the control valve entirely

Answer: A

The motor draws current only while the driver is steering, saving perhaps three per cent of fuel compared with a continuously driven pump. It also allows the assistance to be varied electronically and enables lane keeping and parking assistance. Feel is generally considered inferior. Tracing the requirement back to the physical constraint that produces it makes the answer follow. Working the distinction through on a single concrete case fixes it more firmly than any rule of thumb.

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