Abstract: A rolling bearing includes an inner ring that rotates together with a rotary shaft, an outer ring, a plurality of tapered rollers, and an oil discharge portion provided on one side of the inner ring in the axial direction and that rotates together with the inner ring. The oil discharge portion has a wall portion in a circular plate shape that partially covers an annular space formed between the inner ring and the outer ring, and a plurality of blade portions that are provided on a side surface of the wall portion and that rotate together with the inner ring to cause lubricating oil to flow at least radially inward toward the rotary shaft, radially outward, or toward the one side in the axial direction.

Abstract: A bearing device includes: a bearing portion that has an inner ring, an outer ring, a plurality of balls interposed between the inner ring and the outer ring, and a cage that holds the balls; and an oil supply unit provided adjacent to the bearing portion in the axial direction. The oil supply unit has a pump that discharges a minute amount of lubricating oil to the bearing portion, and varies the amount of oil supplied to the bearing portion by discharge of lubricating oil from the pump.

Abstract: In a cam grinding method, a common surface of a first cam and a second cam is acquired in a common surface setting step. In a first common surface grinding step performed after a first cam grinding step, traverse movement of a grinding wheel is performed such that the grinding wheel is aligned with an area from the first cam to the second cam while the first cam and the second cam are rotated, and the common surface is ground. In a second common surface grinding step performed after a second cam grinding step, traverse movement of the grinding wheel is performed such that the grinding wheel is aligned with an area from the second cam to the first cam while the first cam and the second cam are rotated, and the common surface is ground.

Abstract: A vehicle steering system includes a clutch provided on a power transmission path extending from a steering wheel to steered wheels, a reactive-torque motor configured to apply a steering reactive torque to the steering wheel, a steering operation motor configured to steer the steered wheels, and a clutch engagement controller configured to engage the clutch when a steered angle of the steered wheels has reached a steered angle limit value and the steering wheel is rotated by an amount equal to or greater than a first prescribed value in a direction opposite to a direction toward a steering neutral position, with respect to a first steering angle that is a steering angle of the steering wheel at a time when the steered angle reaches the steered angle limit value, in a case where the clutch is in a disengaged state.

Abstract: A rotor has flux barrier groups. The number of flux barrier groups corresponds to the number of poles, and each of the flux barrier groups has a plurality of arc-shaped flux barriers. The plurality of flux barriers of each flux barrier group include arc-shaped portions formed in a polygonal region that is surrounded by a polygon having vertices at the midpoints in the circumferential direction of the flux barrier groups which are located on the outer peripheral edge of the rotor, as viewed in plan in the direction along a rotor shaft of the rotor. The center of the arcs of the arc-shaped portions of each flux barrier group is located at the midpoint in the circumferential direction of that flux barrier group which is located on the outer peripheral edge of the rotor.

Abstract: An axial end of an output shaft facing toward an input shaft has a first hole that is concentric with the output shaft and that axially extends to a predetermined depth. An axial end of the input shaft facing toward the output shaft has a second hole that is concentric with the input shaft and that axially extends to a predetermined depth. A connection pin is inserted in the first hole and the second hole to connect the first hole and the second hole. When the output shaft and the input shaft axially approach each other, the connection pin interposed between the output shaft and the input shaft allows the output shaft and the input shaft to avoid coming into contact with each other.

Abstract: A motor control unit includes a PWM count changer that when, out of all possible combinations of any two of three phases, at least one of the combinations has a difference in PWM count less than a threshold value, changes a PWM count of at least one of the two phases of the at least one of the combinations for each of PWM periods within a current control period, without changing the total of the PWM counts of the at least one of the two phases within the current control period, such that each of the combinations has a difference in PWM count greater than or equal to the threshold value.

Abstract: An apparatus case of a driving force transmission apparatus includes a first case member having an accommodating chamber that accommodates a clutch mechanism including a friction clutch, a second case member combined with the first case member to form a storage chamber that stores lubricating oil, and a partition wall member that partitions the accommodating chamber and the storage chamber from each other. The partition wall member is retained by being sandwiched between the first case member and the second case member.

Abstract: A tapered roller bearing includes an inner ring including, on its outer circumferential surface, an inner raceway surface and including, on an end portion on a second axial side, a cone back face rib portion protruding radially outward, an outer ring including, on its inner circumferential surface, an outer raceway surface, a plurality of tapered rollers disposed between the inner ring and the outer ring, and an annular cage that retains the plurality of tapered rollers spaced from each other in a circumferential direction. The cage includes a small-diameter annular portion, a large-diameter annular portion located on the second axial side relative to the tapered rollers and the outer ring, and a plurality of cage bar portions. The large-diameter annular portion has an oil pocket having a first aperture that is open radially inward and a second aperture that is open toward the outer raceway surface.

Abstract: A rolling bearing includes: an inner ring; an outer ring; and a plurality of rolling elements provided between the inner ring and the outer ring, wherein: one of the inner ring and the outer ring is a rotating ring; the other one of the inner ring and the outer ring is a firm ring; the firm ring is attached to a prescribed member; and a black oxide film having a mesh-shaped crack is formed on at least one surface of a fitting surface of the firm ring and a side face of the firm ring, the fitting surface facing the prescribed member in a radial direction of the rolling bearing, the side face making contact with the prescribed member in an axial direction of the rolling bearing.

Abstract: A steering angle calculating circuit includes a first neutral point calculating circuit, a second neutral point calculating circuit, and an absolute angle calculating circuit. The first neutral point calculating circuit calculates a motor neutral point (?m01), based on a steering angle detected by a steering sensor and a rotation angle of a motor detected by the relative angle sensor, when a drive source for driving a vehicle is started. The second neutral point calculating circuit calculates a motor neutral point when the steering angle detected by the steering sensor falls within a predetermined angle range in which a specific stroke with respect to the steering angle is constant. After the motor neutral point is calculated by the second neutral point calculating circuit, the absolute angle calculating circuit calculates the steering angle as an absolute angle, using the motor neutral point calculated by the second neutral point calculating circuit.

Abstract: A pump apparatus includes a housing, a shaft, a rotor, a plurality of vanes, a pressure relief passage, and a bearing. The housing includes suction ports and discharge ports. The rotor and the vanes transport hydraulic oil to the discharge ports. The hydraulic oil is sucked from the suction ports. The pressure relief passage is defined in a portion of the housing facing an outer peripheral surface of the shaft. The pressure relief passage brings the discharge ports into communication with a low pressure region where the hydraulic oil is low in pressure. When a pressure of the hydraulic oil in the discharge ports is lower than a first predetermined pressure, the bearing keeps the pressure relief passage out of communication with a passage. When the pressure of the hydraulic oil in the discharge ports has increased to reach or exceed the first predetermined pressure, the bearing brings the pressure relief passage into communication with the passage.

Abstract: A low-friction coating includes: an aliphatic hydrocarbon group showing a peak in a region of 2,900 cm?1 to 3000 cm?1 in an infrared absorption spectrum; a carbonyl group showing a peak in a region of 1,650 cm?1 to 1,800 cm?1 in an infrared absorption spectrum; an aromatic component (C7H7+) showing a peak at mass 91.1 in a positive ion spectrum obtained by TOF-SIMS; and a condensed ring based component (C9H7+) showing a peak at mass 115.2 in the positive ion spectrum obtained by TOF-SIMS.

Abstract: In an electric power converter, a driver unit includes an output unit, an auxiliary power source, a switch circuit unit, and a diode. The output unit includes first and second MISFETs and selectively outputs an on signal or an off signal to a gate electrode of a first HEMT. The auxiliary power source outputs a predetermined positive voltage. The switch circuit unit selectively connects a source electrode of the first MISFET to the auxiliary power source or a drain electrode of the first HEMT. The diode is connected to a source electrode of the second MISFET and is oriented such that forward current flows to a source electrode of the first HEMT. In the event of a short circuit in a certain HEMT, a microcomputer connects the source electrode of the first MISFET to the auxiliary power source and outputs an off command to the driver unit.

Abstract: A hub unit that is to be installed on a vehicle is provided with: an outer ring having, on the inner circumferential surface, a first outer raceway surface and a second outer raceway surface that is disposed to the outside of the first outer raceway surface in the vehicle width direction when the hub unit is installed on the vehicle; an inner shaft that is disposed on the inside of the outer ring concentrically with the outer ring and on which a wheel is installed on the outer end in the vehicle width direction; and an inner ring that is press-fitted to the inner shaft on the inner end in the vehicle width direction.

Abstract: A motor control unit includes a PWM count calculator, a PWM count setter, and a PWM count changer. The PWM count calculator calculates first PWM counts of phases. Each first PWM count is calculated for a current control period. The PWM count setter sets the first PWM count of each phase as a second PWM count of a corresponding phase. The second PWM count is set for each of PWM periods included in the current control period. The PWM count changer changes the second PWM count of at least one of the phases, without changing the total of the second PWM counts of the at least one phase within the current control period, such that the number of times switching elements corresponding to the at least one phase are switched within the current control period is reduced.

Abstract: A steering system includes a pinion shaft that meshes with a rack shaft, an input shaft, a torsion bar that couples the input shaft and the pinion shaft together, a fixing pin that fixes the torsion bar to the input shaft, a housing having a first housing portion that houses a part of the input shaft, and a cover member having a cylindrical portion externally fitted to the input shaft protruding from the first housing portion, and a disc portion that covers an end face of the first housing portion. A through hole where the fixing pin is inserted is formed in the input shaft. On the cylindrical portion of the cover member, a plurality of annular lips are provided, except for a portion that faces each of openings of the through hole, on one side and the other side in an axial direction with respect to the portion.

Abstract: A motor controller includes control systems that control actuation of a motor. Each control system includes a drive circuit and a calculation unit. The calculation unit of each control system is connected to an independent rotation angle sensor. The calculation units include master and slave calculation units. The master and slave calculation units control actuation of the corresponding drive circuit based on a current instruction value calculated by the master calculation unit and a detection result of the rotation angle sensor connected to the master calculation unit. When the detection result of the rotation angle sensor connected to the master calculation unit is abnormal, the master and slave calculation units each use a detection result of the rotation angle sensor connected to the slave calculation unit to control the actuation of the corresponding drive circuit.

Abstract: A cam grinding method includes: a common base circle portion setting step of obtaining an angular range of a common surface based on first cam lift data of a first cam and second cam lift data of a second cam; a first cam grinding step of grinding the first cam; a second cam grinding step of grinding the second cam; and a common base circle portion traverse grinding step of, after the second cam grinding step, moving a grinding wheel in a traverse direction to perform spark-out of an unground part remaining at the boundary between the first and second cams.

Abstract: A grinding machine includes a manual rotating handle provided with a rotation detector that outputs a rotation detection signal so that the position of a grinding wheel with respect to a workpiece can be relatively moved in accordance with the rotation detection signal. The grinding machine further includes a grinding wheel, a moving apparatus that moves the position of the grinding wheel with respect to a workpiece W, a proximity detector that outputs a proximity detection signal corresponding to a relative position or a relative distance between the workpiece and the grinding wheel, a manual rotating handle provided with a rotation detector, and a control apparatus that controls the moving apparatus based on the rotation detection signal. The manual rotating handle is provided with a rotational-torque varying apparatus. The control apparatus controls the rotational-torque varying apparatus based on the proximity detection signal.