Device and method for controlling distribution of drive force of four-wheel drive car
AssigneeJtekt Corporation
InventorsTsuyoshi Murakami, Ryohei Shigeta
Life of this patent
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Abstract
A driving force distribution control apparatus and driving force distribution control method for a four-wheel drive vehicle which can quickly increase torque distribution to sub-drive wheels after a transmission has been shifted down. According to the apparatus and method, when it is determined that the transmission has been shifted down, an ECU controls a coupling capable of changing the torque distribution to the front wheels and rear wheels such that the torque distribution to the front wheels and rear wheels approaches a uniform state.
Claims10
A driving force distribution control apparatus for a four-wheel drive vehicle which has an engine, front wheels and rear wheels to be driven by torque generated by said engine, a coupling capable of changing torque distribution to the front wheels and rear wheels, and a transmission, the driving force distribution control apparatus comprising:
- a controller which controls said coupling in such a way that the torque distribution to said front wheels and rear wheels approaches a uniform state when having determined that said transmission has been shifted down.
A driving force distribution control method for a four-wheel drive vehicle which has an engine, front wheels and rear wheels to be driven by torque generated by said engine, a coupling capable of changing torque distribution to the front wheels and rear wheels, and a transmission, the driving force distribution control method comprising:
- determining whether or not said transmission has been shifted down;
- and
- controlling said coupling in such a way that the torque distribution to said front wheels and rear wheels approaches a uniform state when it is determined that said transmission has been shifted down.
Dependencies are inferred from the claim text.