An apparatus for estimating a column torque in a motor-driven power steering system includes a vehicle speed sensing unit configured to sense a vehicle speed; a steering sensing unit configured to sense a steering state of a driver; a yaw rate sensor configured to output a measured yaw rate by sensing a tilted state of a vehicle; and a column torque estimation unit configured to calculate a self-aligning torque and an estimated yaw rate based on the vehicle speed and the steering state inputted from the vehicle speed sensing unit and the steering sensing unit, estimate a column torque by adjusting angular velocity compensation gains with respect to a steering angular velocity for each of the estimated yaw rate and the vehicle speed, and output a final column torque by adjusting the estimated column torque according to a difference between the measured yaw rate and the estimated yaw rate.

A system and a method of controlling a motor-driven power steering are disclosed. A basic steering torque assist compensation is made according to a LOAM compensation logic under a steering condition such as steering of a steering wheel and holding of the steering wheel after steering, and an additional steering torque compensation is made to reduce the basic steering torque assist compensation amount when returning the steering wheel to the center or releasing the steering wheel in a restoring direction, thereby reducing steering effort felt by a driver when returning the steering wheel to the center or releasing the steering wheel in the restoring direction, and thus maintaining proper steering effort when a torque sensor of a high-performance vehicle fails.

Provided is a steering apparatus 1 including: a wheel 2; and a steering unit 5 configured to steer the wheel 2, the steering apparatus 1 being fixable to a vehicle body, wherein the steering unit 5 includes: a steering drive source (an electric motor incorporated in an electric motor unit 61) configured to steer the wheel 2 with a steering rotation axis 63a as an axis, the steering rotation axis 63a being a rotation axis when the wheel 2 is steered; and a manual toe angle adjustment mechanism 7 different from the steering drive source, the manual toe angle adjustment mechanism 7 enabling a toe angle of the wheel 2 to be manually adjusted around the steering rotation axis 63a.

A vehicle steering device includes a reaction force device, a drive device, a first ECU configured to control the reaction force device, a second ECU configured to control the drive device, a first rudder angle sensor and a second rudder angle sensor each configured to detect a steering angle of a wheel and output the detected steering angle to the second ECU, and a communication line that transmits at least one of steering angles of the wheel as detected values of the first rudder angle sensor and the second rudder angle sensor from the second ECU to the first ECU.

A casing of a power steering system, including at least one fastening seat of a cover, the fastening seat delimiting an orifice, the cover being intended to seal the orifice, the fastening seat including a support wall for the cover, wherein the fastening seat also includes at least one elongation portion disposed outside the support wall, the elongation portion having at least one deformation area configured to be folded over the cover.

A steer-by-wire steering system for a vehicle, including: an operating member operable by a driver; a steering device including an electric motor and configured to steer a wheel by a force generated by the electric motor; a controller configured to control the steering device, wherein the controller enables the wheel to be steered in accordance with an operation of the operating member while imposing limitation on a supply current to the electric motor, and wherein the limitation imposed on the supply current is made smaller when a running speed of the vehicle is lower than a set speed and a steering motion of the wheel is a motion in a direction to decrease a steering amount than i) when the running speed of the vehicle is not lower than the set speed and ii) when the steering motion of the wheel is a motion in a direction to increase the steering amount.

An electric driver device provides a partial redundancy system that is at least partially redundant, or a full redundancy system. The electric driver device has a plurality of circuit systems. The electric driver device includes, in at least a part of the electric circuit, a common circuit extending over at least two of a plurality of circuit systems. The common circuit includes a power supply and/or a connection line that complements signals. At least one of the power supply circuit, an interface circuit, a power supply cutoff circuit, and a connector is not separated and independent from each other for each redundant circuit system.

A smart electronic power steering system and method for a retrofitted electric vehicle are provided. In one embodiment, an electronic power steering system of an electric vehicle is provided. The electronic power steering system comprises one or more computer-readable storage media, a processing system operatively coupled with the one or more computer-readable storage media, and program instructions stored on the one or more computer-readable storage media that, based on being read and executed by the processing system, direct the electronic power steering system to receive a maximum pressure value and a flow rate from the electric vehicle; convert the maximum pressure value and the flow rate into one or more power steering component settings; and send the one or more power steering component settings to one or more power steering components of the electric vehicle.

To restrain a retracting stabilizer from interfering with an assist motor located rearward thereof and ensure energy absorption by a subframe, a vehicle front structure includes an engine; a steering rack disposed frontward of the engine; an assist motor for power steering disposed frontward of the steering rack; a suspension stabilizer disposed frontward of the assist motor; and a subframe mounted with the stabilizer. The stabilizer frontward of the assist motor is disposed offset from the assist motor in an up-down direction so as not to overlap the assist motor in vehicle front view.

An electronic control device includes a plurality of control circuit units, a signal line, and a sneak-in suppression circuit. The plurality of control circuit units are connected to separate grounds, respectively. The signal line connects a first control circuit unit and a second control circuit unit. When a system is defined as a combination of a component and a ground corresponding to a control circuit unit, the sneak-in suppression circuit suppresses a sneak-in of electric power from the ground of one system (i.e., a subject system) to the other system connected by the signal line for preventing a cascading failure.