Driving force control apparatus for four-wheel drive vehicle

Details Driving force control apparatus for four-wheel drive vehicle Driving force control apparatus for four-wheel drive vehicle

2005-08-19

2008-10-14

Winner, Tony H. (Department: 3611)

Motor vehicles

Having four wheels driven

With differential means for driving two wheel sets at...

C701S090000

Reexamination Certificate

active

07434647

ABSTRACT:
A driving force control apparatus for a four-wheel drive vehicle is provided for stably launching the vehicle irrespective of whichever condition of a road surface and whether or not a road is gradient. In the driving force control apparatus for a four-wheel drive vehicle configured to transmit a driving force of a prime mover directly to a left and a right main driving wheel and to a left and a right sub-driving wheel through a clutch, rotational speed sensors detect the rotational speed of the respective main driving wheels and sub-driving wheels, a 2/4 WD•ECU sets a fastening force of the clutch in accordance with a difference between the detected rotational speeds of the main driving wheels and the sub-driving wheels, determines that the four-wheel drive vehicle is in a slip stop state when at least one of the detected rotational speeds of the wheels is equal to or lower than a predetermined rotational speed, and corrects the clutch for the set fastening force when it determines that the four-wheel drive vehicle is in the slip stop state.

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patent: 1 142 745 (2001-10-01), None
patent: 1 375 231 (2004-01-01), None

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