Patent ID: 8682533

Claim:
A lane departure prevention device including steering torque detection means to detect a steering torque, comprising: steering torque variation detection means that detects a variation in output from the steering torque detection means; command value variation detection means that detects a variation in command value to an actuator that is activated to avoid deviation from a lane of a vehicle; driver's intention determination means that determines, when a difference between an output from the steering torque variation detection means and the command value variation detection means is a threshold or more, that a driver's operational intention is present; actuator activation limiting means that sets the command value as 0 (zero) when the driver's operational intention is determined to be present on a basis of an output from the driver's intention determination means; and a counter, wherein the driver's intention determination means determines, with the counter, time duration where a state of a difference between an output from the steering torque variation detection means and the command value variation detection means being a threshold or more, so as to determine presence or not of driver's operational intention.