Fluid-pressure and analogous brake systems – Speed-controlled – And traction control
Reexamination Certificate
2005-02-08
2005-02-08
Graham, Matthew C. (Department: 3683)
Fluid-pressure and analogous brake systems
Speed-controlled
And traction control
C303S196000
Reexamination Certificate
active
06851766
ABSTRACT:
A traction control apparatus for a vehicle sets an allowable slip ratio to a constant value that is rather great, when the shift position of a sub-transmission is in “H4”, or the shift position of the sub-transmission is in “L4” and the difference between the maximum value and the minimum value among wheel speeds of each driving wheel is less than a wheel speed difference threshold value. On the other hand, when the shift position of the sub-transmission is in “L4” and the difference is not less than the wheel speed difference threshold value, the traction control apparatus for the vehicle of the present invention sets the allowable slip ratio to a constant value that is smaller than the above-mentioned constant value. In case where the slip ratio of each driving wheel exceeds the allowable slip ratio set as described above, predetermined braking force is exerted on each driving wheel so as to place the slip ratio of each driving wheel within the allowable slip ratio.
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Ishikawa Toshimi
Murakami Zensaku
Yamada Noritaka
Advics Co., Ltd.
Burns Doane Swecker & Mathis L.L.P.
Graham Matthew C.
Toyota Jidosha & Kabushiki Kaisha
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