Abstract: A method for fine-tuning a variable-gear steering column according to a speed of the vehicle, the method includes: a step of characterizing a desired handling of the vehicle for a speed V1 and of characterizing a desired stability for a speed V2; a step of determining a value G1 of the gear ratio allowing obtaining the desired handling at the speed V1, and a value G2 of the gear ratio allowing obtaining the desired stability at the speed V2, a step of calculating a parameter p1 and a parameter p2 according to the speed V1, the speed V2, the value G1 and the value G2 so that the relationship between the gear ratio and the speed of the vehicle is defined by the equation G=p2+p1/V, when the speed is included between a first threshold and a second threshold.

Abstract: A power supply device includes a driving control device and an auxiliary control device, the vehicle including a main power source, an auxiliary power source, and a supply path, the supply path being a path configured to be opened and closed according to a state of a start switch of the vehicle. The driving control device is a device that controls a state of equipment installed in the vehicle and the auxiliary control device is a device that controls a state of the auxiliary power source. The driving control device is configured to execute a storage process, a permission signal transmission process, and an initial value process, and the auxiliary control device is configured to execute a permission signal reception process and a stop process.

Abstract: A steering control device includes a base axial force calculator, a limiting axial force calculator, and a final axial force calculator. The limiting axial force calculator includes a steering angle holder, a reference angle calculator, a final difference calculator, and an axial force calculator. The steering angle holder is configured to hold a steering angle at the time of limiting a turning operation of the turning wheels when the turning operation is limited. The reference angle calculator is configured to calculate a reference angle. The final difference calculator is configured to calculate a final difference which is a final difference between the reference angle and the current steering angle. The axial force calculator is configured to calculate a limiting axial force based on a value of the final difference.

Abstract: A steering control device includes a control unit. The control unit is configured to execute a control angle calculation process, an angle feedback process, and a standard value adjustment process. The control angle calculation process is a process of calculating a control angle as an absolute angle relative to a standard value, and the angle feedback process is a process of performing feedback control on the control angle, and the standard value adjustment process is a process of adjusting the stored standard value. The standard value adjustment process includes a process of, when, in a straight-ahead state, the control angle deviates from a value showing the straight-ahead state, adjusting the standard value such that the deviation of the control angle from the value showing the straight-ahead state decreases.

Abstract: The steering control device includes a software processing device. The software processing device is configured to execute assist amount setting processing, axial force setting processing, and reaction force application processing. In the assist amount setting processing, an assist amount is set while an output value of first damping processing that outputs a first damping correction amount having a correlation with a steering angular velocity is used. In the axial force setting processing, the axial force is set while an output value of second damping processing that outputs a second damping correction amount having a positive correlation with the steering angular velocity is used. In the reaction force application processing, a value obtained by subtracting the axial force from the assist amount is an input and a reaction force motor is operated.

Abstract: A method for determining a parameter representative of a set torque for a motor including: a regulation step determining a command variable as a function of a DC current threshold and a measured DC current; a determination step determining an upper limit and a lower limit of the parameter representative of the set torque as a function of the command variable; an evaluation step determining the parameter representative of the set torque as a function of the upper limit and the lower limit of the parameter representative of the set torque, and of a parameter representative of the desired torque.

Abstract: A steering device that holds a steering member in such a manner that the steering member is movable between a first position where a driver can steer the steering member and a second position located closer to the front of a vehicle includes: a fixed member attached to a vehicle body; a movable member movably attached to the fixed member via a rail mechanism; a steering shaft attached to the movable member and rotatably holding the steering member; and a reaction force device attached to the movable member at a position non-coaxial with the steering shaft and configured to apply a reaction force to the steering shaft.

Abstract: A control device for a vehicle includes a plurality of control circuits configured to control a control object by starting in response to powering-on of a vehicle and to perform power latch control for continuing to be supplied with electric power in a predetermined period in response to powering-off of the vehicle. Each of the control circuits is configured to perform starting after all of the control circuits have recognized the powering-on of the vehicle in a case where the vehicle is powered on while the power latch control is being performed after the vehicle has been powered off.

Abstract: A motor control device includes a manual steering command value generation unit that generates a manual steering command value, and a hands-on/off determination unit that determines whether a driver is in a gripping state in which the driver is gripping a steering wheel or in a released state in which the driver is not gripping the steering wheel. The manual steering command value generation unit is configured to generate the manual steering command value based on an equation of motion. The motor control device further includes a coefficient value changing unit that changes a value of at least one coefficient among coefficients included in the equation of motion based on a determination result from the hands-on/off determination unit.

Abstract: A steering control device is configured to calculate a reaction force command value to reflect a reaction force component calculated based on an operation amount of an operating lever, and generate a control signal based on the reaction force command value. The steering control device is configured to execute a keeping state determination process for determining whether a keeping condition for the operation amount is satisfied, and a calculation mode switching process for switching a calculation mode of the reaction force command value to a keeping state calculation mode when the keeping condition is satisfied. The keeping state calculation mode is configured such that a dead band that is a range in which the reaction force component does not change with respect to the operation amount is larger than a dead band in a normal state calculation mode.

Abstract: A method for controlling a power steering system of a vehicle which is intended to limit the physical supply current supplied to the at least one power steering motor in the event of an impact between at least one rack and at least one mechanical end stop, the control method including: —a determination step wherein the power steering computer determines a setpoint torque for the power steering motor; —a driving step wherein the power steering computer determines the setpoint supply current for the power steering motor; wherein the control method also includes: —a detection step wherein the power steering computer detects an impact between rack and mechanical end stop; —a protection step emitting a protected signal to the driving step when an impact is detected, so that the setpoint supply current determined by the driving step is below a maximum setpoint supply current.

Abstract: A steering control device includes an emergency determination unit configured to determine whether or not an emergency exists in which an emergency avoidance operation is to be performed, and a work adjustment unit configured to adjust work of a driver required to steer steered wheels. The work adjustment unit is configured to execute emergency adjustment processing for adjusting the work in accordance with a determination result of whether or not an emergency exists. The emergency adjustment processing includes reduction processing for reducing the work in an initial stage after the emergency determination unit determines that an emergency exists, as compared in a case in which determination is not made that an emergency exists.

Abstract: A manual steering command value calculation unit is configured to use road information including information on a road reaction torque to calculate a manual steering command value when a first condition that at least one of input torques for which a dead zone processing unit is provided is outside a dead zone range is satisfied, and not to use the road information to calculate the manual steering command value when the first condition is not satisfied. When alert vibration torque is being applied, the manual steering command value calculation unit uses the road information to calculate the manual steering command value for a predetermined period from a time when a state in which the first condition is satisfied changes to a state in which the first condition is not satisfied.

Abstract: A method for driving an assistance-providing motor of a power-steering system of a vehicle, the assistance-providing motor including a first winding electrically energized by a first inverter, and at least a three-phase second winding electrically energized by a second inverter different from the first inverter, the first winding and the at least a second winding being mechanically coupled to each other, characterized in that it includes, when a malfunction of short-circuit type is detected between a phase of the first winding and a supply or an electric ground of the first inverter: —a determining step; —a measuring step; —a tripping step; —a controlling step.

Abstract: A steering device includes a movable body that rotatably supports a shaft member to which a steering member is attached, and first and second rail mechanisms that guide movement of the movable body in a front-rear direction. The first rail mechanism has a first rolling element row that is disposed between a first raceway face of a first fixed rail and a second raceway face of a first moving rail. The second rail mechanism has a second rolling element row that is between a third raceway face of a second fixed rail and a fourth raceway face of a second moving rail. A contact angle of each of a plurality of first rolling elements with respect to the first and second raceway faces, and the contact angle of each of a plurality of second rolling elements with respect to the third and fourth raceway faces are different from each other.

Abstract: A method for piloting a motor of a power steering system of a vehicle, the power steering system having at least one steering wheel and one rack, the motor being piloted by a closed-loop proportional-derivative regulator (R?) receiving as input an angular position (?m) of the motor and a setpoint angle (?c), the regulator (R?) determining a setpoint motor torque (Cc). The method includes the steps of determining a stiffness compensation, and modifying the angular position (?m) of the motor.

Abstract: A steering control device controls a turning motor that generates a turning force for causing turning wheels of which power transmission to and from a steering wheel is cut off to turn. The steering control device includes a first processor configured to change a steering angle ratio which is a ratio of a turning angle of the turning wheels to a steering angle of the steering wheel according to a vehicle speed through control of the turning motor and a second processor configured to change a degree of change of the steering angle ratio with respect to change of the vehicle speed according to a steering state or a vehicle state.

Abstract: A steering control device includes a control circuit configured to control driving of a reaction force motor that generates steering reaction force applied to a steering wheel in which power transmission with turning wheels of a vehicle is separated. When a vehicle power source is turned on, the control circuit requests a vehicle control device to stop traveling of the vehicle when information is exchanged with the vehicle control device in a manner that does not follow a predetermined pattern.

Abstract: A turning control device includes a precursor detection circuit configured to detect a precursor of an abnormality by which a smooth operation of a turning device is impaired. The precursor detection circuit is configured to start measurement of a total running time of a vehicle when the precursor is detected, and is configured to execute a process of reporting the precursor, based on the measured total running time. The precursor detection circuit is configured to perform the measurement of the total running time regardless of whether the precursor is detected again, when a vehicle electric power source is switched off and then is switched on again after the precursor is detected once.

Abstract: A steer-by-wire steering system for a vehicle, comprising: an operation member operable by a vehicle driver; an urging device configured to generate an urging force to urge the operation member; a steering device configured to steer a wheel; and a controller configured to control the urging device and the steering device. In a normal operation, the controller enables the wheel to be steered in accordance with an operation of the operation member and causes the urging force to function as an operation reaction force against the operation of the operation member. In an automatic steering operation in which the wheel is steered without depending on the operation of the operation member, the controller enables the operation member to be moved in accordance with steering of the wheel by the urging force and causes at least part of the urging force generated in the normal operation not to be generated.