Lane keep control for vehicle
First Claim
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1. A lane keeping apparatus comprising:
- an automatic steering section comprising a steering actuator to bring an actual wheel steer angle of a controlled vehicle to a target wheel steer angle calculated for lane keeping; and
a steering characteristic adjusting section to adjust a steering characteristic of the controlled vehicle, in the case of an automatic steering mode of the automatic steering section, in a first direction to improve a yawing response of the controlled vehicle or in a second direction to improve a running stability of the controlled vehicle in accordance with a steering amount of the automatic steering section, wherein the steering characteristic adjusting section is configured to adjust the steering characteristic of the controlled vehicle in the case of the automatic steering mode of the automatic steering section, in the first direction to improve the yawing response of the controlled vehicle when the steering amount of the controlled vehicle is increased and in the second direction to improve the running stability of the controlled vehicle when the steering amount of the controlled vehicle is decreased.
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Abstract
A vehicle includes a first actuating system having an automatic steering actuator to bring the front wheel steer angle to a calculated target front wheel steer angle for lane keeping, and a second actuating system such as a front and rear roll stiffness distribution control system, a front and rear driving force distribution control system, a rear wheel steering system, and a differential limiting force control system. By controlling the second actuating system in accordance with the automatic steering operation, a control unit adjusts the steering characteristic of the vehicle in a direction to improve the yawing response or in a direction to improve the running stability.
90 Citations
23 Claims
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1. A lane keeping apparatus comprising:
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an automatic steering section comprising a steering actuator to bring an actual wheel steer angle of a controlled vehicle to a target wheel steer angle calculated for lane keeping; and
a steering characteristic adjusting section to adjust a steering characteristic of the controlled vehicle, in the case of an automatic steering mode of the automatic steering section, in a first direction to improve a yawing response of the controlled vehicle or in a second direction to improve a running stability of the controlled vehicle in accordance with a steering amount of the automatic steering section, wherein the steering characteristic adjusting section is configured to adjust the steering characteristic of the controlled vehicle in the case of the automatic steering mode of the automatic steering section, in the first direction to improve the yawing response of the controlled vehicle when the steering amount of the controlled vehicle is increased and in the second direction to improve the running stability of the controlled vehicle when the steering amount of the controlled vehicle is decreased. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A lane keeping apparatus comprising:
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automatic steering means for calculating a target wheel steer angle for lane keeping and for varying a first manipulated variable to bring an actual wheel steer angle of a controlled vehicle to the target wheel steer angle; and
steering characteristic adjusting means for adjusting a steering characteristic of the controlled vehicle in the case of an automatic steering mode of the automatic steering means, by varying a second manipulated variable affecting the steering characteristic of the vehicle, in accordance with a parameter representing a steering amount of the automatic steering means in one of a first direction to improve a yawing response of the controlled vehicle and a second direction to improve a running stability of the controlled vehicle in dependence on the steering amount, the second manipulated variable being a manipulated variable distinct from the first manipulated variable. - View Dependent Claims (19)
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20. A lane keep control method comprising:
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calculating a target wheel steer angle to achieve an automatic steering control for lane keeping;
determining a modification quantity to adjust a steering characteristic of the controlled vehicle in accordance with a parameter representing a steering amount of the automatic steering control; and
controlling an actual wheel steer angle of the controlled vehicle by varying a first manipulated variable so as to bring the actual wheel steer angle to the target wheel steer angle, and adjusting the steering characteristic of the controlled vehicle, by modifying a second manipulated variable affecting the steering characteristic of the vehicle, in accordance with the modification quantity in one of a first direction to improve a yawing response of the controlled vehicle and a second direction to improve a running stability of the controlled vehicle. - View Dependent Claims (21)
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22. A vehicle comprising:
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a first actuating system comprising a lane keeping automatic steering actuator to vary a first manipulated variable to bring an actual wheel steer angle of the vehicle to a target wheel steer angle calculated for lane keeping;
a second actuating system to vary a second manipulated variable affecting a steering characteristic of the vehicle; and
a control unit to adjust the steering characteristic of the vehicle by modifying the second manipulated variable in accordance with a steering amount of the first actuating system. - View Dependent Claims (23)
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Specification