Motor-driven steering controller and automobile anti-skid controller
First Claim
1. An electric power steering assist controlling apparatus for a vehicle, comprising:
- a steering torque controlling unit controlling an electric power assisted steering motor to control a steering torque on a steering wheel depending on an operator'"'"'s steering operation to reduce an operator'"'"'s power required to operate the steering wheel; and
an assist steering torque providing unit for providing a counter-steering assist steering torque which assists an operator'"'"'s counter-steering operation on the steering wheel for the steering torque controlling unit in the counter-steering direction when a difference in braking force between right and left wheels is generated during braking of the vehicle;
wherein the assist steering torque providing unit sets an upper limit of the counter-steering assist steering torque so that the operator can override steering operation.
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Accused Products
Abstract
A motor-driven steering controller for controlling a steering wheel of a vehicle. The controller includes a steering torque controlling unit, a braking force estimating unit, a right and left braking force difference estimating unit and an assist steering torque providing unit. The steering torque controlling unit controls a steering torque on the steering wheel depending on a steering operation. The braking force estimating unit estimates braking forces to be imposed on wheels of the vehicle. The right and left braking force difference estimating unit estimates difference between the braking forces to be imposed on the right and left wheels each estimated by the braking forces estimating unit. The assist steering torque providing unit provides an assist steering torque for the steering torque controlling unit on the basis of the difference in braking force between right and left wheels estimated by the right and left braking force difference estimating unit.
23 Citations
27 Claims
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1. An electric power steering assist controlling apparatus for a vehicle, comprising:
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a steering torque controlling unit controlling an electric power assisted steering motor to control a steering torque on a steering wheel depending on an operator'"'"'s steering operation to reduce an operator'"'"'s power required to operate the steering wheel; and an assist steering torque providing unit for providing a counter-steering assist steering torque which assists an operator'"'"'s counter-steering operation on the steering wheel for the steering torque controlling unit in the counter-steering direction when a difference in braking force between right and left wheels is generated during braking of the vehicle; wherein the assist steering torque providing unit sets an upper limit of the counter-steering assist steering torque so that the operator can override steering operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electric power steering assist controlling apparatus for a vehicle, comprising:
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a steering torque controlling unit controlling an electric power assisted steering motor to control a steering torque on a steering wheel depending on an operator'"'"'s steering operation to reduce an operator'"'"'s power required to operate the steering wheel; and an assist steering torque providing unit for providing a counter-steering assist steering torque which assists an operator'"'"'s counter-steering operation on the steering wheel for the steering torque controlling unit in the counter-steering direction when a difference in braking force between right and left wheels is generated during braking of the vehicle; wherein the assist steering torque providing unit prohibits providing the counter-steering assist steering torque if the difference in braking force between right and left wheels is generated by load shift between right and left wheels due to a turning of the vehicle. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An anti-skid controller in a vehicle including an electric power steering assist controlling apparatus comprising a steering torque controlling unit controlling an electric power assisted steering motor to control a steering torque on a steering wheel depending on an operator'"'"'s steering operation to reduce an operator'"'"'s power required to operate the steering wheel;
- and an assist steering torque providing unit for providing a counter-steering assist steering torque which assists an operator'"'"'s counter-steering operation on the steering wheel for the steering torque controlling unit in the counter-steering direction when a difference in braking force between right and left wheels is generated during braking of the vehicle, the anti-skid controller comprising;
a control parameter setting unit for setting a first control parameter for restraining the braking force on a higher road frictional coefficient side where braking force can be afforded to reduce a yaw moment that induces vehicle stability when provision of the counter-steering assist steering torque by the assist steering torque providing unit is not effected, and for setting a second control parameter different from the first control parameter for utilizing the braking force on the higher road frictional coefficient side to reduce the braking distance when provision of the counter-steering assist steering torque by assist steering torque providing unit is effected; and a braking force controlling unit for controlling the braking forces to be imposed on the wheels depending on the first control parameter set by the control parameter setting unit and the second control parameter set by the control parameter setting unit. - View Dependent Claims (23, 24, 25, 26, 27)
- and an assist steering torque providing unit for providing a counter-steering assist steering torque which assists an operator'"'"'s counter-steering operation on the steering wheel for the steering torque controlling unit in the counter-steering direction when a difference in braking force between right and left wheels is generated during braking of the vehicle, the anti-skid controller comprising;
Specification