B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
303/73
B60T 8/34 (2006.01) B60T 8/175 (2006.01) B60T 8/48 (2006.01) B60T 11/34 (2006.01) B60T 13/16 (2006.01)
Patent
CA 1184956
-39- METHOD AND APPARATUS FOR CONTROLLING WHEEL SLIP ON DIFFERENTIALLY-DRIVEN WHEELS Abstract A standard motor vehicle having a pair of driving wheels powered by a drive shaft through a differential can experience difficulties when one of the two differentially driven wheels loses traction. The differential directs all of the power to the wheel that is slipping and the wheel with traction remains stationary. Various anti-spin devices have been developed but these often produce an abrupt transfer of all of the driving power to the wheel having traction. The anti-spin apparatus of this invention overcomes this problem and includes an electrical control circuit and sensors for generating a slip signal representing the speed difference between the wheels. The apparatus further includes a modulated hydraulic reducing valve for actuating the brake on the faster rotating wheel and a hydraulic modulating control valve connected to the reducing valve and actuated by the slip signal. The reducing valve is modulated to proportionally vary the braking force applied to the faster rotating wheel in accordance with the difference in rotational speeds between the wheels.
368273
Bullard David E.
Myers Allen D.
Caterpillar Tractor Co.
Kirby Eades Gale Baker
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