Power Assisted Steering System with an Auxiliary Electric Pump

  • US 20090194361A1
  • Filed: 12/21/2005
  • Published: 08/06/2009
  • Est. Priority Date: 12/21/2005
  • Status: Active Grant
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First Claim
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1. A method for implementing a downsized mechanical engine-driven power steering assistance device for a truck, comprising:

  • providing a mechanical engine-driven power steering assistance device which is sized so as to provide less than a required power to a power steering unit at idle speeds;

    providing an electric power steering assistance device that is adapted to concurrently provide a supplementary assistance to assistance from said mechanical engine-driven power steering assistance device at idle speeds, such that together said mechanical engine-driven power steering assistance device and said electric power steering assistance device provide a necessary power steering assistance to the power steering unit at idle; and

    providing a controller to control the electric power steering assistance device such that at higher engine speeds, the electric power steering assistance device provides a reduced supplementary assistance to the assistance from said mechanical engine-driven power steering assistance device.

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