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Driving-torque distribution control system for four-wheel drive vehicles

  • US 5,740,877 A
  • Filed: 12/21/1995
  • Issued: 04/21/1998
  • Est. Priority Date: 12/26/1994
  • Status: Expired due to Term
First Claim
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1. A driving-torque distribution control system for a four-wheel drive vehicle, comprising:

  • a transfer having a transfer clutch for variably adjusting a torque distribution between front and rear drive wheels;

    sensor means for detecting an amount of shift of wheel-load from one of left and right wheels included in said secondary drive wheels to another;

    weighting means responsive to said amount of shift of wheel-load for setting a weighting coefficient to a lower speed of rotational speeds of said left and right wheels included in said secondary drive wheels;

    means for calculating a simple mean of rotational speeds of primary drive wheels, and for calculating a weighted mean of rotational speeds of said secondary drive wheels based on said weighting coefficient; and

    means for controlling said transfer clutch in accordance with said torque distribution based on a difference between said simple mean and said weighted mean.

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