Abstract: A program includes a parameter numeric value and a parameter code and a parameter name that are associated with the parameter numeric value. A dialog box information creation processing unit recognizes the parameter code and the parameter name, which are included in the program, as a parameter item, and creates dialog box information from the recognized parameter code and parameter name and the associated parameter numeric value. The parameter numeric value within the created dialog box information is editable on a dialog box display screen. When the parameter numeric value is updated, a process of changing the corresponding parameter numeric value in the program to the updated parameter numeric value is executed.

Abstract: An apparatus for controlling a four-wheel drive vehicle includes a tire friction circle calculator that calculates the size of a tire friction circle of each wheel on the basis of vehicle information including a tire vertical load, a resultant force calculator that calculates the magnitude of a resultant force of tire lateral and longitudinal forces for each wheel, a tire-friction-force usage rate calculator that calculates a tire-friction-force usage rate of each wheel that is the ratio of the magnitude of the resultant force to the size of the tire friction circle, and a driving-braking force adjustment controller that adjusts driving force or braking force applied to each wheel.

Abstract: An auxiliary electric source device is provided on an electric feed path between a main electric source and an electric feed object of the main electric source. The auxiliary electric source device includes an auxiliary electric source. The electric feed object performs a minimal action of fulfilling a desired minimal function with electric feed from the auxiliary electric source when the main electric source has broken down. An electric source performance of the auxiliary electric source is set based on an electric power necessary for the minimal action.

Abstract: A method for manufacturing a spline telescopic shaft according to the present disclosure includes a toothless portion forming step of forming a toothless portion in one of an external tooth of a shaft body and an internal tooth of a tubular body, a resin layer forming step of forming a resin layer by arranging one of the shaft body and the tubular body in a mold including a cavity and injecting a resin into the cavity, the cavity being included in a flat receiving surface that faces tooth flanks of one of the external tooth of the shaft body and the internal tooth of the tubular body, and a cooling step of cooling one of the shaft body including the resin layer and the tubular body including the resin layer to form a lubricant reservoir in the resin layer.

Abstract: An actuator is configured such that a first film body and a second film body are stacked on each other. The first film body includes a first dielectric elastomer film and a first electrode layer provided on a surface of the first dielectric elastomer film. The second film body includes a second dielectric elastomer film and a second electrode layer provided on a surface of the second dielectric elastomer film. The electrode layer included in at least one of the first film body and the second film body includes a plurality of linear electrodes extending in a first direction and provided at intervals in a second direction that is orthogonal to the first direction.

Abstract: A steering control device for a steering system includes an electronic control unit configured to: calculate target torque that is a target value of the motor torque; control operation of the motor; calculate a vehicle speed basic axial force based on a detected vehicle speed; calculate another state quantity basic axial force based on a state quantity other than the detected vehicle speed; calculate a distributed axial force by adding the vehicle speed basic axial force and the other state quantity basic axial force at individually set distribution ratios; calculate the target torque based on the distributed axial force; and reduce the distribution ratio of the vehicle speed basic axial force when the detected vehicle speed is abnormal as compared to when the detected vehicle speed is normal.

Abstract: A machine learning device includes a sparse modeling processing unit and a selection unit. The sparse modeling processing unit acquires individual importance degrees for each of explanatory variable candidates, the individual importance degrees being acquired by using respective sparse modeling methods different from each other, each of the sparse modeling methods taking input data including a specified objective variable in a learning model used for industrial activity and the explanatory variable candidates that are candidates for an explanatory variable for explaining the specified objective variable. The selection unit calculates a comprehensive importance degree for each of the explanatory variable candidates based on the individual importance degrees of each of the explanatory variable candidates, and selects an explanatory variable of the learning model from among the explanatory variable candidates based on the comprehensive importance degree.

Abstract: A rolling bearing device includes a rotary shaft; a housing; a pair of rolling bearings; an outer ring spacer; an elastic member provided in a bottom side of the housing, the bottom side of the housing being a second axial side of the housing, and the elastic member being configured to urge the rolling bearings, the outer ring spacer, and the rotary shaft toward a first axial side; and a retaining ring that is fitted into a circumferential groove provided on an inner periphery in the first axial side of the housing, the retaining ring being in axial contact with the outer ring of the rolling bearing located on the first axial side, and the retaining ring including at least three arc members arranged in a circumferential direction.

Abstract: A cage and roller assembly includes a plurality of rollers to be brought into rolling contact with a raceway surface provided on the outer periphery of a shaft, and an annular cage that retains the rollers. Lubricating oil is supplied through an oil supply hole that is provided inside the shaft and is open at the raceway surface. The cage includes a pair of annular portions, and a plurality of cage bars that couple the annular portions together and are arranged with intervals in a circumferential direction. The rollers are housed in pockets each formed between the pair of annular portions and between the cage bars that are adjacent to each other in the circumferential direction. The cage has an inner recessed groove that is provided on a radially inner surface of the cage bar and extends through the annular portions in an axial direction.

Abstract: A method for a power steering system for empirically determining at least one property of the system including at least one steering wheel, a steering mechanism with a rack, and at least one assist motor, the method including, outside a steering phase during which the power steering system is assigned to drive a vehicle to follow a trajectory determined as a situation function of the vehicle with respect to its environment, a step (a) of automatically activating the assist motor, during which a computer automatically generates and applies to the assistance motor, without requiring action on the steering wheel, an activation instruction following one or more pre-established exploration cycles for measuring, during or at the end of the at least one exploration cycle, at least one indicator parameter is specific to the power steering system response to the automatic activation of the assist motor and is a desired property characteristic.

Abstract: A method for producing a cage for a ball joint of a vehicle that includes a step of injecting a first material via a first injection point so as to form a shell that encloses at least one housing, on a substantially spherical inner surface and a step of injecting a second material via a second injection point so as to form a contact zone in the housing of the shell.

Abstract: A power-steering device intended to be fitted on a vehicle-receiving structure, such as a cradle, the device including a rack as well as at least one actuator subassembly including at least one assistance motor, one drive gear, as well as one load-bearing structure that carries the assistance motor and is arranged to support and guide the drive gear and the rack relative to one another, the device further including one containment casing that is separate from the actuator subassembly and is fonned by connecting at least one base and one bell housing, which are attached to one another by a sealed joint such that the containment casing prevents the actuator subassembly from being exposed to water splashes, dust and salt spray from the outside environment when the power-steering device is in place on the receiving structure of the vehicle.

Abstract: Provided is a steering controller configured to switch from an interruption state to a transmission state. In a state where power transmission from the steering wheel to steered wheels is interrupted, a maximum value selection processing circuit outputs a maximum value, out of a steered angle and a steering angle, to a limiting reaction force setting processing circuit. When the absolute value of the maximum value has become equal to or larger than a limitation start threshold value, the limiting reaction force setting processing circuit rapidly increases a limiting reaction force. An operation signal generation processing circuit controls a reaction-force motor to achieve a reaction force command value corresponding to the limiting reaction force. When the absolute value of the maximum value has become equal to or larger than an engagement threshold value, a clutch is engaged to transmit reaction force from the steered wheel-side to the steering wheel.

Abstract: A rotary device includes: a housing that accommodates a shaft; and a rolling bearing. The rolling bearing includes an outer ring that is attached to the housing, an inner ring that rotates integrally with the shaft, a plurality of tapered rollers, and a cage, and is configured to generate pumping action that causes fluid to flow with an axial component in a bearing annular space when the shaft rotates. A space in the housing on one side of the rolling bearing in the axial direction is a space that is closed except a side close to the rolling bearing. The rolling bearing further includes an oil reservoir portion provided to an end portion of the outer ring in the axial direction and configured to store lubricant between the oil reservoir portion and the outer ring.

Abstract: A planetary roller transmission includes: a fixed ring; a sun shaft; a plurality of planetary rollers; a carrier that has a plurality of support shafts that support the planetary rollers via bearing portions and that revolves together with the planetary rollers; and an annular flange ring provided on one side, in the axial direction, of the fixed ring and the planetary rollers. The inside diameter of the flange ring is smaller than the diameter of a circumscribed circle circumscribed by bearing portions which are arranged in the circumferential direction. An oil storage portion that receives oil that has climbed over the flange ring from the side of the planetary rollers is provided between a side surface of the flange ring and an inner wall surface of the housing. A passage that allows oil to permeate from the oil storage portion to the side of the planetary rollers is provided.

Abstract: A steering controller includes processing circuitry. The processing circuitry is configured to execute an operation process that operates a drive circuit of an electric motor using an operation signal to control torque of the electric motor based on a steering torque input by a driver and a correction process that corrects a calculation parameter that occurs during calculation of the operation signal based on a driving support command value input from outside of the processing circuitry. The driving support command value is used to support driving by the driver. The correction process includes a conversion process that converts a dimension of the driving support command value to a dimension of the calculation parameter, and a process that corrects the calculation parameter using the driving support command value of which the dimension has been converted.

Abstract: A pressure reducing valve includes a piston disposed in a cylinder chamber; a valve element that is coupled to the piston and opens and closes a valve seat; a valve spring that biases the valve element in a direction in which the valve element is moved away from the valve seat; and a biasing member that biases the valve seat toward a side opposite to the piston. The pressure reducing valve is configured to reduce a primary pressure of a fluid to a secondary pressure. The valve seat is disposed such that the valve seat reciprocates in the same direction as a direction in which the valve element reciprocates in the primary pressure chamber. As a difference between the primary pressure and the secondary pressure increases, the valve seat moves toward the secondary pressure chamber.

Abstract: A steering system includes a mechanism configured to turn a steer wheel of a vehicle, a motor configured to generate driving force that is applied to the mechanism, and a controller configured to control the motor according to a steering status. The controller includes a limiting control circuit configured to limit a current that is supplied to the motor to a limiting value, a determining circuit configured to determine whether the steer wheel is in contact with an obstacle by using at least a comparison between a value of the current that is supplied to the motor and a threshold, and a threshold computing circuit configured to compute the threshold that is used by the determining circuit, the threshold computing circuit being configured to compute a value less than the limiting value according to the limiting value as the threshold.

Abstract: A thrust roller bearing includes a plurality of rollers and a cage. Each cage pocket includes a first side surface, and a second side surface. The roller and the cage are configured to satisfy the following expression (1). (Y1+Y2)/X<tan(3×?/180)??(1) Y1 represents a clearance, before skewing, between a first contact point of the roller at which the roller contacts the first side surface when the roller is skewed toward one side and the first side surface, Y2 represents a clearance, before skewing, between a second contact point of the roller at which the roller contacts the second side surface when the roller is skewed toward the one side and the second side surface, and X represents a difference between the radius of a first imaginary circle passing through the first contact point and the radius of a second imaginary circle passing through the second contact point.

Abstract: A thrust roller bearing includes a plurality of rollers and a cage including a plurality of cage pockets for housing the rollers. The rollers each include a cylindrical portion, an outer crowning portion, and an inner crowning portion. The cage pockets each include an outer surface, an inner surface facing a second end surface of the roller, and a pair of side surfaces facing an outer peripheral surface of the roller. The side surfaces each include a recessed surface that is not contactable with the roller, and flat surfaces that are provided on the outer side in the radial direction and on the inner side in the radial direction, respectively, and are contactable with the roller. A first dimension is larger than a second dimension.