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US 6,189,643 B1Granted
Differential limiting control apparatus for four wheel drive vehicle
AssigneeFuji Jukogyo Kabushiki Kaisha
InventorsAkira Takahashi, Yutaka Hiwatashi
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AssigneeFuji Jukogyo Kabushiki Kaisha
InventorsAkira Takahashi, Yutaka Hiwatashi
Estimating the term…
When an accelerator pedal is released, or when a brake pedal is depressed and if braking force is lower than a reference braking force corresponding to a braking force immediately before causing a wheel lock, differential limiting force of a center differential is set to a predetermined value so as to retain an under-steer condition while engine brake is applied. When the brake pedal is depressed and if braking force is higher than the reference braking force, differential limiting force of the center differential is set to zero so as to assist an anti-lock brake system. Further, the reference braking force can be determined according to a road friction coefficient, a grade of road, a lateral acceleration and the like. Further, the predetermined value of the differential limiting force may be a constant value or may be a value corresponding to a front-to-rear weight distribution ratio.
A differential limiting control apparatus for a four-wheel drive vehicle having a center differential for distributing torque from an engine to the wheels of the vehicle, the control apparatus comprising:
A method of controlling a differential limiting force of a four-wheel drive vehicle having a center differential for distributing torque from an engine to the wheels of the vehicle, the method comprising:
Dependencies are inferred from the claim text.