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AssigneeFuji Jukogyo Kabushiki Kaisha
InventorYutaka Hiwatashi
Estimating the term…
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.
A driving force distribution control system of a four wheel drive vehicle having an engine, a transmission, a center differential with a variable capacity transfer clutch for varying a driving force distribution between front and rear wheel sides by varying an engaging torque of said transfer clutch, comprising:
A road friction coefficient estimating apparatus for a motor vehicle having an engine and a transmission, comprising:
Dependencies are inferred from the claim text.