Slip control apparatus for a four wheel drive vehicle
First Claim
1. A slip control apparatus for a four wheel drive vehicle in which each of wheels consisting of left-hand front and right-hand front wheels and left-hand and right-hand rear wheels is driven, comprising:
- slippage detecting means for detecting a slippage amount on pavement for each of the wheels;
brake means for applying a braking force individually to each of the wheels;
output adjusting means for adjusting output of an engine for driving the wheels;
judgment means for judging a combination of two slipping wheels out of four wheels, which are detected by the slippage detecting means as slipping in a degree of slippage above a given value; and
control means for reducing torque for driving the two slipping wheels in accordance with one of control modes on the basis of a judgment result by the judgment means, a control mode being preset so as to operate which means out of the brake means and the output adjusting means in association with the combination of the two slipping wheels.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is a four wheel drive vehicle with four wheels drivable, which is provided with a first slip control apparatus for reducing a driving force to the wheels by operating a brake mounted on each of the wheels and with a second slip control apparatus for reducing a driving force to the wheels by reducing the engine output. Operation of only the first slip control apparatus or both the first and second slip control apparatuses is selectively carried out in accordance with the number of wheels which are detected to be slipping in an amount greater than a given degree of slippage. Particularly when such slipping wheels are two, the slip control is conducted by operating only the first slip control apparatus or both the first and second slip control apparatuses in accordance with control modes predetermined on the basis of six combinations in which such two slipping wheels out of the four wheels are combined with each other.
43 Citations
30 Claims
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1. A slip control apparatus for a four wheel drive vehicle in which each of wheels consisting of left-hand front and right-hand front wheels and left-hand and right-hand rear wheels is driven, comprising:
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slippage detecting means for detecting a slippage amount on pavement for each of the wheels; brake means for applying a braking force individually to each of the wheels; output adjusting means for adjusting output of an engine for driving the wheels; judgment means for judging a combination of two slipping wheels out of four wheels, which are detected by the slippage detecting means as slipping in a degree of slippage above a given value; and control means for reducing torque for driving the two slipping wheels in accordance with one of control modes on the basis of a judgment result by the judgment means, a control mode being preset so as to operate which means out of the brake means and the output adjusting means in association with the combination of the two slipping wheels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A slip control apparatus for a four wheel drive vehicle in which each of wheels consisting of left-hand front and right-hand front wheels and left-hand and right-hand rear wheels is driven, comprising:
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slippage detecting means for detecting a magnitude of slippage on pavement for each of the wheels, which is greater than a given degree of slippage; brake means for applying a braking force individually to each of the wheels; output adjusting means for adjusting output of an engine for driving the wheels; and control means for reducing a driving torque acting upon a slipping wheel on the basis of one of control modes predetermined so as to operate the brake means or the output adjusting means in accordance with the number of the slipping wheel or wheels which is or are detected by the slippage detecting means as slipping in a degree of slippage greater than the given value. - View Dependent Claims (30)
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Specification