A driving assist system includes: a first detection unit configured to detect first rotational information that is information about rotation of a left wheel of a vehicle; a second detection unit configured to detect second rotational information that is information about rotation of a right wheel of the vehicle; and a processing unit configured to estimate a running turning radius of a running turning circle on a running route on which the vehicle drives from the first rotational information and the second rotational information.

There is provided a vehicle behavior control device capable of improving responsivity of a vehicle behavior and a linear feeling with respect to a steering wheel operation without causing a driver to experience a strong feeling of intervention of the control, and capable of controlling behavior in such a manner as to improve stability of the vehicle attitude and riding comfort. The device includes a PCM which acquires a steering speed relating to a jerk in a width direction of the vehicle, sets a torque reduction flag, indicative of whether or not a condition for allowing reduction of an output torque of an engine is satisfied, based on the steering speed, and starts to reduce a torque when the torque reduction flag is set to True indicative of a state in which the condition for allowing reduction of the torque is satisfied.

Embodiments of the present invention provide apparatus for monitoring one or more target objects in an environment external to a host vehicle by means of at least one sensor, the apparatus being arranged to trigger at least one action responsive to the detection of prescribed relative movement between the host vehicle and the one or more target objects, wherein the apparatus is arranged to monitor one or more control inputs of the vehicle and to over-ride triggering of the at least one action such that triggering of the at least one action is not performed in the event that a prescribed movement of one or more of the control inputs is detected.

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 vehicle driving force control device comprises: a behavior control mechanism for reducing a driving force of an engine according to a steering speed; a driving force distribution mechanism for distributing the driving force of the engine to rear road wheels; and an ECU for controlling the mechanisms. The behavior control mechanism reduces the driving force by a target torque reduction amount set based on the steering speed, to thereby generate a deceleration, and the driving force distribution mechanism distributes the driving force to the front road wheels and the rear road wheels based on a distribution rate set for the rear road wheels depending on a traveling state, and the ECU corrects the distribution rate based on the target torque reduction amount during cornering of the vehicle.

A computer includes a processor and a memory storing processor-executable instructions. The processor is programmed to record steering-system torque in response to a difference between a detected steering angle and a requested steering angle exceeding an angle threshold, increment a counter based on the recorded steering-system torque, and set a repair indicator in response to the counter exceeding a counter threshold.

There is provided a vehicle behavior control device capable of improving responsivity of a vehicle behavior and a linear feeling with respect to a steering wheel operation without causing a driver to experience a strong feeling of intervention of the control and, at the same time, capable of controlling behavior of a vehicle in such a manner as to also improve stability of the vehicle attitude and riding comfort. In a vehicle behavior control device applied to a vehicle 1 having steerable front road wheels 2, the vehicle behavior control device includes a PCM 14 which acquires a steering speed of the vehicle, and increases a vertical load on the front road wheels when the steering speed becomes equal to or greater than a given threshold T.sub.S1 which is greater than zero.

There is provided a vehicle behavior control device capable of improving responsivity of a vehicle behavior and a linear feeling with respect to a steering wheel operation without causing a driver to experience a strong feeling of intervention of the control and, at the same time, capable of controlling behavior of a vehicle in such a manner as to also improve stability of the vehicle attitude and riding comfort. In a vehicle behavior control device applied to a vehicle 1 having steerable front road wheels 2, the vehicle behavior control device includes a PCM 14 which acquires a steering speed of the vehicle, and increases a pitch angle in such a direction that a front portion of the vehicle dips when the steering speed becomes equal to or greater than a given threshold T.sub.S1 which is greater than zero.

An active roll control apparatus is provided. The apparatus includes a first actuator that is disposed adjacent to front wheels or rear wheels and is configured to adjust roll stiffness. A controller operates the first actuator in a reverse phase control manner in a roll angle increasing direction when a vehicle is in a low-friction turning driving state.

A computer that includes a processor and memory. The memory may store instructions executable by the processor. The instructions may include: following a driver-initiated trigger to deactivate a driver assist mode, to reactivate the mode when, for a dwelling period, each of a plurality of conditions equal respectively predetermined value.