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Front-and-rear wheel drive vehicle

  • US 6,349,782 B1
  • Filed: 05/11/2000
  • Issued: 02/26/2002
  • Est. Priority Date: 05/12/1999
  • Status: Expired due to Term
First Claim
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1. A front-and-rear wheel drive vehicle, comprising:

  • an engine driving at least one of a pair of front wheels and rear wheels;

    a field-control motor driving the other pair of front wheels and rear wheels;

    a speed sensor detecting rotating speed of the other pair of wheels; and

    a control unit controlling field current of said motor based on the detected rotating speed, and wherein the control unit uses the detected rotating speed to indirectly detect a motor rotation number of the field-control motor.

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