A lane deviation prevention control device for a vehicle includes a target steering torque calculator, a friction torque estimator, and a friction compensation rate variable controller. The target steering torque calculator calculates target steering torque to be applied to a steering system of an own vehicle in a lane deviation prevention control. The friction torque estimator estimates friction torque of the steering system. The friction compensation rate variable controller performs, on the basis of steering torque produced by a driver's steering operation and on the basis of a traveling state of the own vehicle, a variable control of an addition rate at which the friction torque is added to the target steering torque to compensate friction of the steering system.

Provided is a travel control device for a vehicle such that comfortable and safe control for the vehicle is possible without disturbing the driver. The travel control device for the vehicle is provided with a control command computation unit for calculating a steering assist amount for assisting the steering of the vehicle and an acceleration command value for controlling braking and driving forces of the vehicle. The control command computation unit calculates an estimated lateral position of the vehicle at a gaze distance ahead of the vehicle; calculates a lateral displacement amount of the vehicle at the estimated lateral position from a target traveling path and a lateral displacement speed; calculates a steering assist amount on the basis of the lateral displacement amount and the lateral displacement speed; calculates a lateral acceleration and lateral jerk generated by the vehicle according to the steering assist amount; and calculates an acceleration command value based on the lateral acceleration and the lateral jerk.

A steering device includes a steering wheel, a torsion bar, a spiral cable, a torque sensor, and an electronic control unit. The electronic control unit is configured to compute a rotational angle of the steering wheel. The electronic control unit is configured to compute, as driver torque, a value that includes a sum obtained by adding torsion bar torque, a steering wheel inertial torque compensation value and a spiral cable torque compensation value. The steering wheel inertial torque compensation value is the product of a steering wheel inertial moment and a second-order differential value of the rotational angle of the steering wheel. The spiral cable torque is torque that acts on the steering wheel because of the spiral cable.

The control method of a vehicle is a method to control the vehicle at the time of switching from the automatic driving to the manual driving, changes driving force distribution of the vehicle to right and left driving force distribution, and gradually or stepwisely switches to the manual driving while returning the right and left driving force distribution to original driving force distribution. In addition, a steering amount at the time of the automatic driving is stored when a requirement of switching from the automatic driving to the manual driving is issued, the driving force distribution of the vehicle is changed to the right and left driving force distribution based on the steering amount at the time of the automatic driving, and the automatic driving is gradually or stepwisely switched to the manual driving while the right and left driving force distribution is returned to the original driving force distribution.

Systems and methods are provided for generating data indicative of a friction associated with a driving surface, and for using the friction data in association with one or more vehicles. In one example, a computing system can detect a stop associated with a vehicle and initiate a steering action of the vehicle during the stop. The steering action is associated with movement of at least one tire of the vehicle relative to a driving surface. The computing system can obtain operational data associated with the steering action during the stop of the vehicle. The computing system can determine a friction associated with the driving surface based at least in part on the operational data associated with the steering action. The computing system can generate data indicative of the friction associated with the driving surface.

A vehicle travel control apparatus includes an anomaly monitoring section for determining, through monitoring, whether or not a driver is in an anomalous state in which the driver has lost his or her ability to drive the vehicle, and a deceleration section for automatically stopping the vehicle by decelerating the vehicle after a final anomaly determined time which is a point in time when the anomaly monitoring section finally determines that the driver is in the anomalous state. The deceleration section prohibits deceleration of the vehicle in the case where the deceleration section determines that the vehicle is present in the deceleration prohibited section after the final anomaly determination time.

The present invention relates to a method for assisting a driver of a host vehicle in the event of a road departure. Collecting a set of drive parameter values, wherein each drive parameter is indicative of a present driving condition parameter for the vehicle. Calculating a collective road departure value based on the set of drive parameter values. When the road departure value exceeds a road departure threshold value, adapt at least one of the speed of the vehicle or the steering torque applied by the steering control system to the steerable wheels of the vehicle, until the road departure value is below the road departure threshold value.

A travel control apparatus includes: an abnormality information acquisition section that acquires information indicating that an abnormality of a driver of a vehicle is detected; a status determination section that makes a determination that the driver is in a driving difficulty state, when the abnormality of the driver is detected continuously; and an evacuation control section that initiates an automatic evacuation control stopping automatically the vehicle when the status determination section makes a determination that the driver is in the driving difficulty state. The travel control apparatus further includes an assistance control section that initiates a driving assistance control during an interval from when the abnormality is detected to when the driving difficulty state is determined; the driving assistance control includes at least activating a lane departure prevention function of the vehicle.

A vehicle driving assist apparatus of the invention starts a collision avoidance steering assist control to automatically steer the vehicle to avoid a collision of the vehicle with the obstacle in response to a driver performing a collision avoidance steering operation for avoiding the collision when there is a possibility that the vehicle collides with the obstacle. The vehicle driving assist apparatus cancels the collision avoidance steering assist control in response to the driver performing a counter collision avoidance steering operation against automatically steering the vehicle intended to be achieved by the collision avoidance steering assist control after a first predetermined time elapses from starting the collision avoidance steering assist control. The vehicle driving assist apparatus continues the collision avoidance steering assist control until the first predetermined time elapses from starting the collision avoidance steering assist control even when the driver performs the counter collision avoidance steering operation.

An autonomous driving system configured to perform an autonomous driving of a vehicle includes a lane change determination unit configured to determine a necessity of an operation intervention for a lane change of the vehicle by a driver of the vehicle during the autonomous driving, a lane change request unit configured to request the driver to perform the operation intervention for the lane change of the vehicle when the lane change determination unit determines that it is necessary to perform the operation intervention for the lane change of the vehicle by the driver, and a mode switching unit configured to switch a steering torque mode for a lane keep control in the autonomous driving from a normal steering torque mode to a weak steering torque mode when the driver is requested to perform the operation intervention for the lane change of the vehicle.