Torque split control apparatus

Details Torque split control apparatus Torque split control apparatus

1993-05-20

1995-10-24

Chin, Gary

Boots, shoes, and leggings

180197, 180233, B60K 17348

Patent

active

054615682

ABSTRACT:
A torque split control apparatus for use with 4WD type vehicle. The drive from the engine is transmitted to the primary drive wheels of the vehicle and to the secondary drive wheels of the vehicle through a torque distributing clutch capable of varying a torque transmitted to the secondary drive wheels. A wheel speed difference between speeds of rotation of the primary and secondary drive wheels, a vehicle speed and a difference between the diameters of the tires of the primary and secondary drive wheels are sensed. A dead zone is calculated as a function of tire diameter difference and vehicle speed. The calculated dead zone increases as the sensed tire diameter difference increases and as the sensed vehicle speed increases. The calculated dead zone is subtracted from the calculated wheel speed difference to correct the wheel speed difference. The corrected wheel speed difference is used to calculate a torque. A smaller one of the calculated torque and a maximum torque is selected. The torque distributing clutch is controlled to transmit the selected torque to the secondary drive wheels.

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