Boots – shoes – and leggings
Patent
1995-07-10
1997-07-15
Chen, Gary
Boots, shoes, and leggings
364424058, 364426011, 364426037, 180197, 180410, 180422, 280 911, B62D 600
Patent
active
056489030
ABSTRACT:
A four wheel steering strategy determines when the rear tire longitudinal slip becomes greater than the front tire longitudinal slip, either due to braking or acceleration, such that the rear tire slip angles must be increased to maintain vehicle balance with respect to the level of understeer/oversteer. The out-of-phase rear steering angle is reduced or the in-phase rear steering angle is increased to increase the rear tire slip angles and thereby correct vehicle balance. Three embodiments are disclosed which use estimated tire longitudinal slips, wheel speeds, and engine throttle information, respectively. The required inputs for the various embodiments can be obtained from independent sensors or preferably are available from other vehicle systems such as an anti-lock braking system, a traction control system or an engine management system. Advantageously, the present invention operates without requiring expensive sensors such as yaw sensors which are currently not feasible for mass market use.
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Chen Gary
Dixon Richard D.
Ford Global Technologies Inc.
May Roger L.
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