Power steering apparatus

  • US 20060237256A1
  • Filed: 04/10/2006
  • Published: 10/26/2006
  • Est. Priority Date: 04/11/2005
  • Status: Active Grant
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First Claim
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1. A power steering apparatus comprising:

  • a hydraulic power cylinder including first and second fluid pressure chambers to assist a steering mechanism;

    a reversible pump including first and second outlets to supply a hydraulic pressure to the power cylinder;

    a first fluid passage connecting the first outlet of the reversible pump with the first pressure chamber of the power cylinder;

    a second fluid passage connecting the second outlet of the reversible pump with the second pressure chamber of the power cylinder, a motor to drive the reversible pump in one of forward and reverse directions;

    a steering load sensing section to ascertain a steering load of the steering mechanism; and

    a motor controlling section to control the motor in accordance with the steering load;

    wherein the first and second fluid passages are made substantially equal in pressure loss to each other.

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