Abstract: The four-wheel steering system includes a front-wheel steering system that steers front wheels of a vehicle and a rear-wheel steering system that steers rear wheels of the vehicle in accordance with a steering angle that is a rotation angle of a steering wheel. The rear-wheel steering system includes a second ECU that, when the vehicle speed is equal to or lower than a vehicle speed threshold, performs antiphase control in which the rear wheels are steered in the opposite direction to that in which the front wheels are steered. When the vehicle speed is equal to or lower than the vehicle speed threshold, the second ECU performs in-phase control in which the rear wheels are steered in the same direction as that in which the front wheels are steered, in response to a specific trigger operation that is performed via the steering wheel.

Abstract: A bearing device includes a rotational shaft; a first outer ring; a second outer ring; first balls; second balls disposed; and a C-spacer and a second spacer. ?>?d is satisfied, where ?d represents a difference between an inside diameter of the second spacer at an end portion on a second side and an outside diameter of a shaft outer circumferential face, and ? represents a half of a difference between a diameter of a cylindrical face of the C-spacer on an outer circumferential side and a diameter of the cylindrical face of the C-spacer on an inner circumferential side.

Abstract: A cylinder case includes a first main path communicating first port with an end surface, a second main path communicating a second port with the end surface, first and second front chamber paths respectively communicating a front chamber with the end surface, and first and second rear chamber paths respectively communicating a rear chamber with the end surface. A manifold block includes a first intermediate path communicating first and second manifold holes opened in an abutting surface with each other and a second intermediate path communicating third and fourth manifold holes opened in the abutting surface. The manifold block configured to be attached and fixed to the cylinder case such that the abutting surface is abutted against the end surface and a relative position of the abutting surface with respect to the end surface portion is capable of being selected from a first position and a second position.

Abstract: A motor control device includes a table in which a motor torque generated from a reluctance torque utilizing motor is stored with respect to a combination of an armature current command value and a current phase angle command value at which the motor torque is maximized for the armature current command value, a first setting portion that sets a motor torque command value that is a command value of a motor torque to be generated by the reluctance torque utilizing motor, and a second setting portion that sets, based on the table, an armature current command value and a current phase angle command value for making a motor torque that is in accordance with the motor torque command value set by the first setting portion be generated from the reluctance torque utilizing motor.

Abstract: A manufacturing device manufactures a bearing unit including an inner ring member outwardly fitted onto an end portion of a shaft main body of an inner shaft on one side in an axial direction and fixed by a swaged portion extending from the end portion. The manufacturing device includes: a rotating mechanism including a rotor which holds the other side of the inner shaft in the axial direction from below and rotates the inner shaft about a center axis of the inner shaft while the center axis is aligned with an up-down direction, the rotor being mounted below a processing area of the bearing unit; and a swaging mechanism mounted above the processing area and including a punch which is brought into contact with the swaged portion to plastically deform the swaged portion.

Abstract: A method for controlling an assist motor of a power steering system, power steering system including the assist motor configured to apply a motor torque on a rack, and at least one steering computer, method being designed to servo-control a position of the rack to a position setpoint, method including: a maneuvering step in which the assist motor exerts a motor torque on the rack according to a motor torque setpoint; wherein the method also includes: servo-control step in which the steering computer determines a speed setpoint of the rack according to the position setpoint and to the position of the rack; limitation step in which the steering computer issues a limited speed setpoint which is lower than or equal to a maximum speed threshold; control step in which the steering computer determines the motor torque setpoint according to the limited speed setpoint and to a speed of the rack.

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 holder has a protrusion which protrudes from a side surface at a side opposite in an axial direction with respect to a rolling element held in a pocket toward the side opposite in the axial direction. An oil supply hole which penetrates through the holder from the side surface to a surface at a side of the rolling element in the axial direction is formed in the holder. When the holder rotates, the protrusion guides oil into the oil supply hole, and the oil is introduced from the side surface of the holder to the surface on the side of the rolling element.

Abstract: A wet friction disc includes a friction surface and a lubrication groove through which a lubricant supplied to the friction surface flows. The lubrication groove has a plurality of circumferential groove portions that extends in a circumferential direction and a plurality of intersecting groove portions that extends in directions intersecting the circumferential direction. At least one of the circumferential groove portions has a through-hole that extends through the wet friction disc between an opposite surface facing s mating member and a surface on the opposite side in an axial direction.

Abstract: A control device of a steering device, for a vehicle, which includes left and right steering mechanisms not mechanically coupled to each other, and which steers left and right steered wheels individually by driving force of steering actuators, includes: a steered angle determining unit that determines a target steered angle for each of the left and right steering mechanisms; and a steering command unit that generates drive signals corresponding to the target steered angles, and outputs the drive signals to each of the actuators. When an anomaly occurs in one of the left and right steering mechanisms, the steered angle determining unit sets the target steered angle for the steering mechanisms that is normal to be different from the target steered angle when both the left and right steering mechanisms are normal.

Abstract: A pump device includes a rotating body, a pump housing including a suction port and a discharge port, and a relief valve. In the pump device, a fluid is sucked from the suction port and discharged from the discharge port by rotation of the rotating body. The relief valve includes a valve body and a biasing member. The discharge port includes an one end in a direction in which the discharge port extends. The one end is shallower than a middle portion of the discharge port. The pump housing includes a relief flow path through which the fluid flows when the relief valve opens. The relief flow path is provided so as to be open to a groove bottom surface of the one end of the discharge port.

Abstract: A tripod constant-velocity joint including: an inner ring; three trunnions protruding from the inner ring; three roller units supported by the trunnions; and an outer ring storing the roller units. Each roller unit includes: an inner roller that is in contact with a convex outer-circumferential surface of the corresponding trunnion at a tangent point; an outer roller supported by the inner roller through rolling elements that are interposed between the inner and outer rollers; and a limiting portion protruding from the outer roller, so as to limit movements of the rolling elements and the inner roller. A clearance between the inner roller and the limiting portion is smaller than an axial length of a crowned end portion of each rolling element, and is larger than a stroke distance of reciprocating movement of the tangent point when a joint angle of the tripod constant-velocity joint is a predetermined value.

Abstract: A wet friction disc includes a lubrication groove and a plurality of lands defined by the lubrication groove. The lubrication groove has a plurality of circumferential groove portions that extends in a circumferential direction and has a predetermined groove width in a radial direction, and a plurality of intersecting groove portions that extends in directions intersecting the circumferential direction. At least some of the circumferential groove portions have an arc shape such that an end in the circumferential direction is located adjacent to one of the lands in the circumferential direction and that the groove width is entirely contained within a range in the radial direction spanned by that land.

Abstract: A steering control device includes a microcomputer. The microcomputer is configured to calculate a torque command value that is a target value of a motor torque, set a restricting value that is an upper limit of an absolute value of the torque command value, restrict the absolute value of the torque command value to be equal to or less than the restricting value, control driving of a motor such that the motor torque follows the restricted torque command value, calculate a steering angle restricting value that decreases based on an increase of an absolute value of a rotation angle, and an absolute value of an angular velocity, when the absolute value of the rotation angle of the rotary shaft exceeds a steering angle threshold, and set the restricting value to be a value equal to or less than the steering angle restricting value.

Abstract: A steering controller includes processing circuitry configured to execute a first operation process that, when an angle command value is not input from outside of the processing circuitry, calculates a first torque command value corresponding to a steering-side operation amount and operating a drive circuit of an electric motor to adjust torque of the electric motor to the first torque command value. The processing circuitry is further configured to execute a second operation process that, when the angle command value is input from the outside of the processing circuitry, calculates a second torque command value corresponding to at least an angle-side operation amount of the steering-side operation amount and the angle-side operation amount and operating the drive circuit of the electric motor to adjust the torque of the electric motor to the second torque command value.

Abstract: The connection device for connecting two electric units, including a case in which are arranged: an electric wire to be linked to the first unit and including a conductive core encircled by an insulating sheath and a conductive tab to be linked to the second unit and secured with the stripped end of the conductive core, all of which being immersed in a sealing material filling the case and bonded to the insulating sheath, the device including an intermediate envelope partially coating the insulating sheath, so that it is in contact with the sealing material only over a reduced portion, where the intermediate envelope is in sliding contact with the sealing material and/or the insulating sheath.

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 method for managing a power steering system assist motor, includes defining, over the functional length of the actuator member, at least one reduced assist area separate from a normal assist area by an end-of-travel virtual threshold, a step of assessing an instantaneous position and a direction of the movement of the actuator member on the functional length, a step of applying an input resistance set point value to the assist motor when the actuator member crosses the end-of-travel virtual threshold in such a way as to move from the normal assist area into the reduced assist area. After the step of applying an input resistance set point value, an output resistance set point value is applied when the actuator member is in the reduced assist area and the direction of the movement of the actuator member is directed from the reduced assist area towards the normal assist area.

Abstract: A constant-velocity universal joint including a generally cup-shaped outer joint member and an inner joint member that define first and second groove portions. A pinch angle by which a ball is pinched in the first groove portion is open toward an opening of the outer joint member. A pinch angle by which the ball is pinched in the second groove is open toward a bottom of the outer joint member. An absolute value of the pinch angle in a larger-pinch-angle groove portion that is one of the first and second groove portions, is larger than an absolute value of the pinch angle in a smaller-pinch-angle groove portion that is the other of the first and second groove portions in a reference state. A radial clearance in the smaller-pinch-angle groove portion is larger than a radial clearance in the larger-pinch-angle groove portion when torque is not transmitted in the reference state.

Abstract: An actuator that applies force to a member associated with steering, and a control device that controls the actuator, have duplex configuration. First and second control devices compute the same controlled variable as first and second controlled variables, respectively. In a normal mode, the control device controls the actuator according to the first controlled variable. The first and second control devices send and receive respectively computed controlled variables to and from each other via communications. When a discrepancy arises between the first and second controlled variables, or an abnormality occurs in communications between the first and second control devices, the operating mode is switched from the normal mode to an independent mode. In the independent mode, the first and second control devices control the first and second actuators, according to the first and second controlled variables, respectively.