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For a four-wheel-drive vehicle

  • US 6,606,549 B1
  • Filed: 09/08/2000
  • Issued: 08/12/2003
  • Est. Priority Date: 09/08/1999
  • Status: Expired due to Fees
First Claim
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1. A drive-force distribution controller for a four-wheel-drive vehicle in which drive force produced by a prime mover is transmitted directly to front or rear wheels and is transmitted to the remaining wheels via a torque distribution clutch, and the engagement force of the torque distribution clutch is controlled in accordance with traveling conditions of the vehicle, the drive-force distribution controller comprising:

  • a calculation unit for calculating variation per unit time in rotational speed difference between the front wheels and the rear wheels; and

    a control unit for controlling the engagement force such that the engagement force increases as the variation per unit time in the rotational speed difference increases.

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