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AssigneeToyota Jidosha Kabushiki Kaisha
InventorsYutaka Taga, Seitoku Kubo, Yuji Kashihara, Kunio Morisawa, Mitsuru Takada, Yasunari Nakamura
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In a four wheel drive power transmission system for a vehicle, a power distribution device receives rotational power from an engine and provides rotational power to the combination of the front wheels and also to the combination of the rear wheels, and is controllable either to provide differential action between the front wheels combination and the rear wheels combination, or for this differential action to be at least partially inhibited by torque transmission. This slippage control device includes: a subsystem which estimates the torque being input to the power distribution device for four wheel drive from the transmission mechanism; and a subsystem which provides differential action inhibition of the power distribution device according to the thus estimated value of the torque being input to it from the transmission mechanism. The method of operation of this device is also described.
For a four wheel drive power transmission system for a vehicle with two front wheels, two rear wheels, a transmission mechanism, and an engine, comprising a power distribution device for four wheel drive which receives rotational power from said engine via said transmission mechanism and which provides said rotational power to the combination of the front wheels of said vehicle and also to the combination of the rear wheels of said vehicle, said power distribution device for four wheel drive comprising a means for providing differential action between said combination of said front wheels of said vehicle and said combination of said rear wheels of said vehicle, and a means for selectively inhibiting its said differential action by providing torque transmission capacity:
For a four wheel drive power transmission system for a vehicle with two front wheels, two rear wheels, a transmission mechanism, and an engine, comprising a power distribution device for four wheel drive which receives rotational power from said engine via said transmission mechanism and which provides said rotational power to the combination of the front wheels of said vehicle and also to the combination of the rear wheels of said vehicle, said power distribution device for four wheel drive comprising a means for providing differential action between said combination of said front wheels of said vehicle and said combination of said rear wheels of said vehicle, and a means for selectively inhibiting its said differential action by providing torque transmission capacity;
Dependencies are inferred from the claim text.