Motion control device of vehicle
First Claim
1. A vehicle motion control device provided with braking force controlling means that exerts on each wheel of the vehicle braking force for producing a yawing moment on the vehicle in the direction opposite to the turning direction when the vehicle is in the turning state and an excessive rolling angle is tend to occur on the vehicle body, comprising:
- inflation pressure obtaining means for respectively obtaining a tire inflation pressure of each wheel, wherein the braking force controlling means controls the braking force exerted on each wheel such that, in the case where at least one of the tire inflation pressures of the wheels at the outer side of the turning direction is lower than a corresponding tire inflation pressure reduction judging reference value, the yawing moment that is exerted, as a result of the braking force being exerted on each wheel, on the vehicle in a direction opposite to the turning direction is increased compared to the case where all of the tire inflation pressures of the wheels at the outer side of the turning direction are not less than each of corresponding tire inflation pressure reduction judging reference values, when the braking force is exerted on each wheel.
1 Assignment
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Accused Products
Abstract
A control of a vehicle motion control device 10 is as follows during an oversteer restraining control. Specifically, when tire inflation pressure is appropriate, the device sets braking force exerted on each of front and rear wheels at the outer side of the turning direction so as to be reference braking forces Ff1 and Fr1, that are generated when an absolute value of a lateral acceleration deviation ΔGy is not less than a reference value a1 and that respectively increase up to an upper limit value ff and upper limit value fr in accordance with the increase in the absolute value of the lateral acceleration deviation ΔGy. On the other hand, when a tire inflation pressure of one of the front and rear wheels at the outer side of the turning direction is lowered, the device sets the braking force, such that the braking force starts to be generated from when the absolute value of the lateral acceleration deviation ΔGy is smaller than the reference value a1 by an amount in accordance with the reduction in the tire inflation pressure and that the upper limit value of the braking force with respect to the wheel whose tire inflation pressure is lowered is decreased by an amount in accordance with the reduction in the tire inflation pressure and that the upper limit value of the braking force with respect to the wheel that is not the wheel whose tire inflation pressure is lowered is increased by an amount in accordance with the reduction in the tire inflation pressure.
21 Citations
5 Claims
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1. A vehicle motion control device provided with braking force controlling means that exerts on each wheel of the vehicle braking force for producing a yawing moment on the vehicle in the direction opposite to the turning direction when the vehicle is in the turning state and an excessive rolling angle is tend to occur on the vehicle body, comprising:
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inflation pressure obtaining means for respectively obtaining a tire inflation pressure of each wheel, wherein the braking force controlling means controls the braking force exerted on each wheel such that, in the case where at least one of the tire inflation pressures of the wheels at the outer side of the turning direction is lower than a corresponding tire inflation pressure reduction judging reference value, the yawing moment that is exerted, as a result of the braking force being exerted on each wheel, on the vehicle in a direction opposite to the turning direction is increased compared to the case where all of the tire inflation pressures of the wheels at the outer side of the turning direction are not less than each of corresponding tire inflation pressure reduction judging reference values, when the braking force is exerted on each wheel. - View Dependent Claims (2, 3, 4, 5)
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Specification