A technology of mechanically classifying a switching operation between a traveling mode and a special moving mode is provided to prevent a mode switching misoperation. A traveling mode switching mechanism of a four-wheel independent steering type vehicle includes a shift gate which is disposed by forming a moving path of a shift lever, and grouping a traveling mode and a special moving mode. Additionally, a mode switching differentiation devices differentiates a mode switching operation of a driver by configuring so that an operation of the shift lever switched between the traveling mode and the special moving mode is physically different from an operation of the shift lever switched between the traveling modes or between the special moving modes.

The present invention relates to a steering function-equipped hub unit (1) having a function of steering a rear wheel, the hub unit including: a hub unit body (2) having a hub bearing (15) configured to support the rear wheel (9R); a unit support member (3) rotatably supporting the hub unit body (2) about a turning axis (A) extending in a vertical direction, the unit support member being configured to be provided to a rear-wheel suspension (Rs); and a steering actuator (5) configured to rotate the hub unit body (2) about the turning axis (A).

A vehicle includes a first steered axle and a second steered axle behind the first steered axle. The second steered axle is steerable independently from the first steered axle. The vehicle includes wheels on the second steered axle. An electric steering motor is connected to the at least one of the wheels.

An apparatus for estimating a friction coefficient of a road surface is provided. The apparatus includes a current sensor configured to measure a control current value of a rear wheel steering (RWS) motor, a stroke sensor configured to measure a stroke value indicating a movement amount of a rear wheel steering link, and a controller configured to estimate the friction coefficient of the road surface based on the control current value measured by the current sensor and the stroke value measured by the stroke sensor.

An autonomous vehicle for passengers includes four steerable wheels where each steerable wheel is steered by a steering system having a set of two actuators. One actuator of each set of actuators is powered by a first power source while the other actuator of the set of powered by a second power source. Four controllers each control one actuator of each set of actuators and one actuator from another set of actuators.

An apparatus for controlling rear wheel steering is provided. The apparatus includes a turning state estimator that acquires steering angle information from a steering angle sensor and estimates a turning state by calculating a required steering speed from the steering angle information. A normal state lateral acceleration predictor predicts a normal state lateral acceleration to match the required steering speed in response to determining that the required steering speed is equal to or greater than a speed threshold value. A rear wheel steering angle calculator calculates a rear wheel steering angle based on the steering angle and the lateral acceleration.

A driving support control unit of a driving support apparatus executes driving support control for supporting at least part of driving by a driver. A support determining unit determines whether or not predetermined conditions for terminating the driving support control are satisfied. A physical amount acquiring unit acquires a physical amount corresponding to a curviness degree of a driving lane on which an own vehicle drives. A curviness degree determining unit determines whether or not a curviness degree indicated by the physical amount acquired by the physical amount acquiring unit is smaller than a predetermined degree in the case where the predetermined conditions for terminating the driving support control are satisfied. A termination command unit commands the driving support control unit to terminate the driving support control if the curviness degree determining unit determines that the curviness degree is smaller than the predetermined degree.

A method for operating a motor vehicle having an active roll control and an active steering system designed to map a steering-wheel setting angle predetermined by a driver of the motor vehicle in accordance with a predetermined steer response onto a steer angle of the motor vehicle. The method includes operating the active steering system in a normal operating mode having a normal steer response and upon determining an active roll control fault operating the active steering system in a fallback operating mode in accordance with an fallback steer response, the fallback steer response different from the normal steer response.

A computer includes a processor and a memory, the memory storing instructions executable by the processor to input a current trajectory and a planned path for a vehicle to a state observer algorithm to obtain a target yaw rate, compare the target yaw rate to an actual yaw rate to determine one of an oversteer or an understeer condition, and apply brakes on one or more but less than all wheels of the vehicle based on determining the understeer or oversteer condition.

A driving assistance device of a vehicle connected to a trailer, a vehicle system including the same, and a method thereof are provided. The vehicle driving assistance device includes a processor that determines a driving situation and a braking situation of a vehicle towing a trailer based on vehicle's internal signals and determines an amount of rear wheel steering control and an amount of braking control based on the driving situation and the braking situation of the vehicle and a storage storing the amount of rear wheel steering control and the amount of braking control, determined by the processor, and the vehicle's internal signals.