Back to results
US 5,702,164 AGranted
Traction control through cross-axes oscillation control
AssigneeFord Global Technologies, LLC
InventorsMinh N. Tran, Davorin D. Hrovat
Life of this patent
Estimating the term…
Abstract
This invention uses cross-axis oscillation control of braking for traction control systems. Changing the amount of braking on each side of the vehicle reduces total wheel slip in a well-controlled, smooth and highly effective manner.
Claims1
A traction control system for a vehicle having an engine, brakes and a powertrain, said system providing additional traction by providing control of the brakes by alternately braking the driving wheels a different amount in a manner so as to reduce the total amount of wheel slip, comprising the steps of:
- determining if a first driving wheel is spinning;
- increasing braking of said first driving wheel;
- determining if a second driving wheel is spinning above a predetermined amount;
- if yes, increasing braking of said second driving wheel for a predetermined pulse duration and completely reducing braking of said first driving wheel;
- setting a predetermined second wheel slip trigger level;
- setting a first flag if one wheel is spinning;
- setting a second flag if the second wheel slip is above the trigger level;
- determining if a slip error in the second wheel, expressed as a difference between the second wheel speed and a reference wheel speed, is decreasing below a predetermined level or if the predetermined pulse duration for increased braking of the second driving wheel has expired;
- and
- resetting said first and second flags.
7 more elements
Dependencies are inferred from the claim text.