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Transmission and constant speed accessory drive

  • US 20060154775A1
  • Filed: 02/14/2006
  • Published: 07/13/2006
  • Est. Priority Date: 02/18/2004
  • Status: Active Grant
First Claim
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1. A method of operating a belt drive accessory system comprising the steps of:

  • transmitting a torque with a first endless member from a driver member to a planetary ball transmission input;

    coaxially aligning the planetary ball transmission input with a planetary ball transmission output;

    transmitting a torque by a second endless member from the planetary ball transmission output to a driven accessory;

    selecting a speed ratio of the planetary ball transmission according to a driver member rotational speed, thereby operating the driven accessory at a substantially constant speed at a point of substantially maximum efficiency over a drive member rotational speed range; and

    frictionally locking the speed ratio of the planetary ball transmission when a drive member speed is constant.

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