Lane-keep control system and method for vehicle
First Claim
1. A lane-keep control system comprising:
- a traveling condition detector that detects a traveling condition of a vehicle; and
a controller including;
a steering intention detecting section configured to detect whether a driver has an intention to steer the vehicle;
a first steering torque control section configured to control, when the driver has no intention to steer the vehicle, a steering torque according to the traveling condition so that the vehicle keeps a predetermined position between lane markings of a traveling lane; and
a second steering torque control section configured to control, when the driver has an intention to steer the vehicle, a steering torque according to the traveling condition so that a steering operation of the driver is readily reflected in steering of the vehicle;
further comprising a steering angle sensor configured to detect an actual steering angle, wherein the controller further includes a target steering angle calculating section that calculates a target steering angle necessary for the vehicle to keep the predetermined position between the lane markings, wherein the first steering torque control section is configured to control the steering torque such that the actual steering angle coincides with the target steering angle, and the second steering torque control section is configured to control the steering torque according to a steering angle deviation, wherein the steering angle deviation is a difference between the target steering angle and the actual steering angle;
wherein the second steering torque control section is configured to control a steering torque control amount for increasing the steering torque such that the steering torque control amount increases with an increase of the steering angle deviation, wherein a rate of increase of the steering torque control amount decreases with an increase of the steering angle deviation.
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Accused Products
Abstract
A lane-keep control system includes a traveling condition detector and a controller. The controller includes a steering intention detecting section that detects whether a driver has an intention to steer a vehicle, a first steering torque control section that controls, when the driver has no intention to steer the vehicle, a steering torque according to the traveling condition so that the vehicle keeps a predetermined position between lane markings of a lane, and a second steering torque control section that controls, when the driver has an intention to steer the vehicle, the steering torque according to the traveling condition so that a steering operation of the driver is readily reflected on steering of the vehicle. A lane-keep control method is also provided.
22 Citations
16 Claims
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1. A lane-keep control system comprising:
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a traveling condition detector that detects a traveling condition of a vehicle; and a controller including; a steering intention detecting section configured to detect whether a driver has an intention to steer the vehicle; a first steering torque control section configured to control, when the driver has no intention to steer the vehicle, a steering torque according to the traveling condition so that the vehicle keeps a predetermined position between lane markings of a traveling lane; and a second steering torque control section configured to control, when the driver has an intention to steer the vehicle, a steering torque according to the traveling condition so that a steering operation of the driver is readily reflected in steering of the vehicle; further comprising a steering angle sensor configured to detect an actual steering angle, wherein the controller further includes a target steering angle calculating section that calculates a target steering angle necessary for the vehicle to keep the predetermined position between the lane markings, wherein the first steering torque control section is configured to control the steering torque such that the actual steering angle coincides with the target steering angle, and the second steering torque control section is configured to control the steering torque according to a steering angle deviation, wherein the steering angle deviation is a difference between the target steering angle and the actual steering angle; wherein the second steering torque control section is configured to control a steering torque control amount for increasing the steering torque such that the steering torque control amount increases with an increase of the steering angle deviation, wherein a rate of increase of the steering torque control amount decreases with an increase of the steering angle deviation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A lane-keep control system comprising:
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a traveling condition detecting means for detecting a traveling condition of a vehicle; a steering intention detecting means for detecting whether a driver has an intention to steer the vehicle; a first steering torque control means for controlling, when the driver has no intention to steer the vehicle, a steering torque according to the traveling condition so that the vehicle keeps a predetermined position between lane markings of a traveling lane; a second steering torque control means for controlling, when the driver has an intention to steer the vehicle, a steering torque according to the traveling condition so that a steering operation of the driver is readily reflected in steering of the vehicle; and a steering angle sensing means for detecting an actual steering angle, wherein the system further includes a target steering angle calculating section that calculates a target steering angle necessary for the vehicle to keep the predetermined position between the lane markings, wherein the first steering torque control means is configured to control the steering torque such that the actual steering angle coincides with the target steering angle, and the second steering torque control means is configured to control the steering torque according to a steering angle deviation, wherein the steering angle deviation is a difference between the target steering angle and the actual steering angle; wherein the second steering torque control means is configured to control a steering torque control amount for increasing the steering torque such that the steering torque control amount increases with increase of the steering angle deviation, wherein a rate of increase of the steering torque control amount decreases with an increase of the steering angle deviation.
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10. A lane-keep control method comprising:
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detecting a traveling condition of a vehicle; detecting whether a driver has an intention to steer the vehicle; when the driver has no intention to steer the vehicle, controlling a steering torque according to the traveling condition so that the vehicle keeps a predetermined position between lane markings of a traveling lane; when the driver has an intention to steer the vehicle, controlling the steering torque according to the traveling condition so that a steering operation of the driver is readily reflected in steering of the vehicle; and detecting an actual steering angle, calculating a target steering angle necessary for the vehicle to keep the predetermined position between the lane markings of the traveling lane, wherein the controlling of the steering torque when the driver has no intention to steer the vehicle includes controlling the steering torque so that the actual steering angle coincides with the target steering angle, wherein the controlling of the steering torque when the driver has an intention to steer the vehicle includes controlling the steering torque according to a steering angle deviation that is a difference between the target steering angle and the actual steering angle; wherein the controlling of the steering torque when the driver has an intention to steer the vehicle comprises controlling a steering torque control amount for increasing the steering torque, wherein the steering torque control amount increases with an increase of the steering angle deviation and a rate of increase of the steering torque control amount decreases with an increase of the steering angle deviation. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification