Lane-keep control system and method for vehicle

A lane-keep control system comprising:

• a traveling condition detecting means that detects a traveling condition of a vehicle;
• a steering intention detecting means that detects whether a driver has an intention to steer the vehicle;
• a first steering torque control means 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 traveling lane;
• and
• a second steering torque control means that controls, 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 on steering of the vehicle.

A lane-keep control method comprising:

• 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;
• and
• 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 on steering of the vehicle.