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Four wheel drive vehicle with antilock brake device and associated method operation

  • US 4,765,433 A
  • Filed: 11/04/1986
  • Issued: 08/23/1988
  • Est. Priority Date: 11/06/1985
  • Status: Expired due to Fees
First Claim
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1. An antilock brake device for a four wheel drive vehicle having front and rear axles, left and right wheels on each axle with brakes associated with each wheel, a power unit drivingly connected to one of said axles, the other axle being coupled for drive together with said one axle, a hydraulic braking system for controlling the hydraulic pressure applied to the brakes, and antilock control means coupled to said braking system for controlling the hydraulic braking pressure to reduce the pressure when a wheel is about to be locked, said antilock control means comprising a front wheel control section for controlling the brakes of the front wheels and a rear wheel control section for controlling the brakes of the rear wheels, and means included in said front and rear wheel control sections for keeping the hydraulic braking pressure reduced up to the completion of a braking operation, when any of the wheels is about to be locked.

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