Vehicle steering control device
First Claim
1. A device for controlling a steering characteristic of a vehicle, the vehicle having a vehicle body, at least one pair of left and right wheels including at least one pair of left and right steered wheels, a steering wheel and a steering apparatus operated based upon a motion of the steering wheel and a control of the device, so as to enhance an effect of suppressing a change in a behavior of the vehicle body due to a difference between driving and braking forces on the left and right wheels, wherein:
- the device makes an amount of controlling the steering characteristic smaller as an index indicating an amount of a shift of vertical loads between the left and right wheels is increased; and
in the vehicle, a traction control is executed in which a braking force of a driven wheel of the wheels is controlled when either of acceleration slips on the driven wheels is excessive;
the steering characteristic is controlled so as to enhance an effect of suppressing a change in a behavior of the vehicle due to a difference between driving forces on the left and right wheels; and
the difference between the driving forces on the left and right wheels are estimated based upon a difference between the braking forces on the left and right driven wheels under the traction control for either of the driven wheels.
1 Assignment
0 Petitions
Accused Products
Abstract
A new and novel device for controlling a steering characteristic of a vehicle such as automobile so as to enhance an effect of suppressing a change in a behavior of the vehicle body due to a difference between driving and braking forces on the left and right wheels is characterized in that the device makes an amount of controlling the steering characteristic smaller as an index indicating an amount of a shift of vertical loads between the left and right wheels is increased. The steering characteristic is modified through controlling steering assist torque or a steering angle of the steered wheels. The steering assist by the steering control device is fully effective when the vehicle is running on a straight road having surfaces of different frictional coefficients while less effective on a curved road having a uniform frictional surface, preventing undesirable and unexpected modification of the steering characteristic during turning of the vehicle.
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Citations
11 Claims
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1. A device for controlling a steering characteristic of a vehicle, the vehicle having a vehicle body, at least one pair of left and right wheels including at least one pair of left and right steered wheels, a steering wheel and a steering apparatus operated based upon a motion of the steering wheel and a control of the device, so as to enhance an effect of suppressing a change in a behavior of the vehicle body due to a difference between driving and braking forces on the left and right wheels, wherein:
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the device makes an amount of controlling the steering characteristic smaller as an index indicating an amount of a shift of vertical loads between the left and right wheels is increased; and in the vehicle, a traction control is executed in which a braking force of a driven wheel of the wheels is controlled when either of acceleration slips on the driven wheels is excessive;
the steering characteristic is controlled so as to enhance an effect of suppressing a change in a behavior of the vehicle due to a difference between driving forces on the left and right wheels; and
the difference between the driving forces on the left and right wheels are estimated based upon a difference between the braking forces on the left and right driven wheels under the traction control for either of the driven wheels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A device for controlling a steering characteristic of a vehicle, the vehicle having a vehicle body, at least one pair of left and right wheels including at least one pair of left and right steered wheels, a steering wheel and a steering apparatus operated based upon a motion of the steering wheel and a control of the device, so as to enhance an effect of suppressing a change in a behavior of the vehicle body due to a difference between driving and braking forces on the left and right wheels, wherein:
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the device makes an amount of controlling the steering characteristic smaller as an index indicating an amount of a degree of turning of the vehicle is increase; and in the vehicle, a traction control is executed in which a braking force of a driven wheel of the wheels is controlled when either of acceleration slips on the driven wheels is excessive;
the steering characteristic is controlled so as to enhance an effect of suppressing a change in a behavior of the vehicle due to a difference between driving forces on the left and right wheels; and
the difference between the driving forces on the left and right wheels are estimated based upon a difference between the braking forces on the left and right driven wheels under the traction control for either of the driven wheels.
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Specification