A position measurement system for a steering system includes a steering shaft. The position measurement system also includes a worm gear coupled to the steering shaft. The position measurement system further includes a worm in meshed engagement with the worm gear, the worm driven by a motor. The position measurement system yet further includes a first sensor operatively coupled to the worm to detect an angular position of the worm and the motor that drives the worm. The position measurement system also includes a driving gear coupled to the steering shaft. The position measurement system further includes a spur gear in meshed engagement with the driving gear. The position measurement system yet further includes a second sensor operatively coupled to the spur gear to detect an angular position of the spur gear.

An alignment tool for a work vehicle includes: an axle housing connecting portion having a housing mating feature configured to mount to a respective mating feature of an axle housing; and a steering knuckle connecting portion coupled with the axle housing connecting portion and having a knuckle mating feature configured to mount to a respective mating feature of a steering knuckle, the steering knuckle connecting portion being coupled to the axle housing connecting portion and angled with respect to the axle housing connecting portion such that the housing mating feature is mountable to the mating feature of the axle housing and the knuckle mating feature is mountable to the mating feature of the steering knuckle only when the steering knuckle is at a fully steered position.

A position sensor is provided that can detect a position along a long stroke and that can limit an increase in size.

A magnetic sensor has a first magnetic field detecting element that is positioned in a first track; a first processor 4A that outputs voltage VM1 when intensity of a first magnetic field that is applied to the first magnetic field detecting element is equal to or larger than a threshold and that outputs predetermined high voltage VH when the intensity of the first magnetic field is less than the threshold, wherein the voltage VM1 is voltage between predetermined low voltage VL and the high voltage VH and indicates positions of the magnets relative to the first magnetic field detecting element; a second magnetic field detecting element that is positioned in a second track; and a second processor 4B that outputs the low voltage VL when intensity of a second magnetic field that is applied to the second magnetic field detecting element is less than the threshold and that outputs voltage VM2 when the intensity of the second magnetic field is equal to or larger than the threshold, wherein the voltage VM2 is voltage between the low voltage VL and the high voltage VH and indicates positions of the magnets relative to the second magnetic field detecting element.

The present disclosure relates to a rear-wheel steering system and a controlling method thereof. The rear-wheel steering system includes: a rack configured to transmit a driving force generated from a rear-wheel steering motor to rear wheels; a first correction module configured to, when an engine is started, detect a position of the rack using a displacement sensor and calculate a first correction value that is a difference between the detected position and a neutral position; a second correction module configured to, when the engine is started, detect a position of the rack using a motor position sensor that detects a rotation angle of the rear-wheel steering motor and calculate a second correction value that is a difference between the detected position and the neutral position; a comparison determiner configured to compare the first correction value and the second correction value to determine whether the displacement sensor has malfunctioned; and a steering controller configured to control an operation of the rear-wheel steering motor. Accordingly, it is possible to determine whether an error occurs in the displacement sensor and to return the rack to the neutral position even when the error has occurred in the displacement sensor.

A steering device for a vehicle includes a steering rod and at least one drive unit, wherein the steering rod can be displaced along its longitudinal extent by the drive unit. The steering device also includes at least one first sensor device for determining a displacement position of the steering rod. The steering rod, as seen along its longitudinal extent, exhibits at least one change in its cross section, in particular diameter, wherein the first sensor device is designed to sense the change.

An electric power steering system includes: a steering bar, an electric motor, a linear position sensor, and a sensing means. The steering bar is mechanically connected at each opposing end to a respective wheel carrier. The linear position sensor having one elongate feature that extends diagonally along a length of the steering bar such that it is inclined relative to the axis of the steering bar. The sensing means faces the steering bar and at any given time observes only a slice of the elongate feature that extends across the full width of the feature and along only a part of the length of the feature. The sensing means generates a signal that varies depending on the pattern formed by the feature and adjacent portions of the steering bar that is observed by the sensing means.

A steering control device includes an electronic control unit. The electronic control unit detects an absolute steering angle. The electronic control unit controls driving of a motor. The electronic control unit determines whether movement of a turning shaft to one of right and left sides has been limited by an end contact or execution of end contact relaxation control. The electronic control unit acquires a plurality of limit position determination angles corresponding to the absolute steering angle. The electronic control unit permits update of an end-position-corresponding angle. The electronic control unit updates the end-position-corresponding angle stored in the electronic control unit.

A number of variations may include a vehicle, system and method of estimating roadwheel angle based on camera input. A number of variations may include at least one of camera based angle detection of roadwheels; tire alignment problem detection using available cameras; or detection of gross roadwheel/tire problems using cameras.

An electric drive device includes a housing with a motor-housing-side annular groove portion formed on an outer peripheral surface of an end surface portion of the housing, on an opposite side to an output portion of a rotation shaft of an electric motor section. The groove portion is formed by an annular groove retreating inward in the radial direction orthogonal to the axial line of the housing. A metal-cover-side distal end portion is formed at the opening end of a metal cover covering an electronic control unit that controls the electric motor section, and faces the groove from the outer side. A space between the groove portion and the distal end portion is filled with a liquid sealant, and an annular inclined surface is inclined so it is widened outward in the radial direction of the metal cover is formed on the inner peripheral surface of the groove portion.

A turning device includes: a motor configured to generate a drive force for independently steering a steered wheel; a speed reducer connected to a rotary shaft body of the motor; and a brake configured to suppress transfer of torque between the motor and the speed reducer.