Four wheel drive transfer case controller compatible with a spar

Details Four wheel drive transfer case controller compatible with a spar Four wheel drive transfer case controller compatible with a spar

1997-06-06

2000-04-04

Cuchlinski, Jr., William A.

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Control of power distribution between vehicle axis or wheels

701 74, 701 79, 701 89, 180197, 180233, 180248, G06F 700

Patent

active

060472316

ABSTRACT:
A method of monitoring the relative effective diameters of the tires and compensating therefor in a vehicle which includes a front driveshaft for transferring motive power to a front set of wheels and a rear driveshaft for transferring motive power to a rear set of wheels, each of the wheels having an effective diameter. Front and rear driveshaft values indicative of the rotational speed of each driveshaft are generated. A difference value indicative of a difference between said front and rear driveshaft values is then generated. A low pass filtered value is generated according to the relationship of Y.sub.1p =(1-.beta.)*U(k)+.beta.*Y.sub.1p (k-1). The low pass filtered value is monitored for a predetermined period of time to determine if one of the wheels has a smaller effective diameter than the other wheels.

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