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Slip-controlled brake system for all-wheel driven automotive vehicle

  • US 4,746,173 A
  • Filed: 10/02/1986
  • Issued: 05/24/1988
  • Est. Priority Date: 10/02/1985
  • Status: Expired due to Term
First Claim
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1. A slip-controlled brake system for an all-wheel driven automotive vehicle having front and rear axles and having vehicle wheels and wheel brakes and being equipped with differential locks, said system comprising, in combination:

  • a plurality of electrically actuated brake pressure modulators respectively coupled to said wheel brakes for reducing braking pressure in response to slip control signals;

    a plurality of sensors respectively coupled to said wheels for providing signals indicative of wheel rotational behavior;

    means coupled to said sensors for providing an output signal indicative of said wheel rotational behavior;

    means responsive to said output signal for applying a first set of slip control signals to the modulators associated with the wheels of said front axle;

    means responsive to said output signal for applying a second set of slip control signals to the modulators associated with the wheels of said rear axle; and

    ,wherein said second set of slip control signals modulates the braking pressure reduction at the rear wheel at a control rate which is less than the control rate of said first set of slip control signals means for continuously engaging said differential lock while providing said slip control signals.

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