Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Indication or control of braking – acceleration – or deceleration
Patent
1998-08-06
2000-07-25
Nguyen, Tan
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Indication or control of braking, acceleration, or deceleration
701 69, 701 80, 180197, B60K 1734
Patent
active
060946148
ABSTRACT:
In a four wheel drive vehicle, a driving force distribution control apparatus estimates a road friction coefficient and controls a transfer clutch of a center differential based on the estimated road friction coefficient so that a driving force distribution on the rear wheel side becomes larger as the estimated road friction coefficient becomes small. An initial value of the road friction coefficient is established to be a low value such as 0.3 when a wiper switch is turned on, an outside air temperature is low, a traction control apparatus operates, an anti-lock brake control apparatus operates, a braking force control apparatus operates, a slip detecting apparatus detects a slip and a transmission control unit outputs a signal and is established to be an intermediate value such as 0.5 when an initial start judgment section judges an initial start of the engine after a long period of stop.
REFERENCES:
patent: 5365439 (1994-11-01), Momose et al.
patent: 5742917 (1998-04-01), Matsuno
patent: 6023649 (2000-02-01), Matsuura et al.
Farber Martin A.
Fuji Jukogyo Kabushiki Kaisha
Nguyen Tan
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