Abstract: A rolling bearing unit for a wheel includes an outer ring member having a flange portion formed on its outer periphery and fitted to a vehicle body-side member, an inner ring member rotatably fitted in the outer ring member, and double-row rolling elements arranged between the outer ring member and the inner ring member. The flange portion includes a first flange portion formed on the upper-side portion of the outer periphery, and a second flange portion and a third flange portion formed on the lower-side portion of the outer periphery. Each of the first, second and third flange portion has a bolt-hole used to fit the outer ring member to the vehicle body-side member. The first flange portion is formed in such a manner that the bolt-hole thereof is positioned on the vertical line that passes through the rotational center of the outer ring member.

Abstract: A solenoid valve comprises a solenoid portion 10 and a valve portion 20. The solenoid portion 10 is constructed by a stator core 12, an electromagnetic coil 14 and a plunger 15. The valve portion 20 is constructed by a valve sleeve 21 and a spool 25 axially forming plural lands 26a-26c in series. The plunger 15 is axially moved by electromagnetic attraction and drives the spool 25. There are formed the same pressurized areas at the plunger 15 and the land of the spool 25 closest to the plunger 15. Therefore, the volume in an intermediate space B between the plunger 15 and the spool 25 is constant and contaminants in the oil are not sucked into the intermediate space B.

Abstract: In a shaft coupling monitoring apparatus for monitoring a spider joint using outer peripheries of four shafts of a cross shaft as rolling contact surfaces, each of the shafts contains therein a sensor for detecting any damage on the rolling contact surface thereof. Even in a case where the spider joint is incorporated in a driving shaft such as of a rolling mill, the monitoring apparatus may provide high-accuracy and early detection of any damage such as flaking on the rolling contact surface defined on each of the shafts of the cross shaft.

Abstract: A vehicle steering system includes: a steering actuator that imparts a steering force to a steering mechanism of a vehicle; an automatic steering controller that performs an automatic steering control by controlling the steering actuator; a driving state detector that detects a driving state of the vehicle during the automatic steering control; a threshold value setting unit that variably sets a threshold value for permitting an intervention in the automatic steering control; and an automatic steering intervention unit that intervenes in the automatic steering control based on a threshold value set by the threshold value setting unit.

Abstract: A universal joint includes a yoke having a fitting portion for fitting a shaft. The fitting portion has first and second tabs opposed to each other to form a U shape. A fixing mechanism including a bolt passing through respective insertion holes in the first and second tabs and a nut screwed onto the bolt on a fastening axis fastens and fixes the shaft between the first and second tabs. A nut holding member fixed to the second tab has an engaging piece. The engaging piece causes the nut, which has not been screwed onto the bolt, to be held on the fastening axis. A cover held by the nut holding member covers at least the engaging piece around the nut.

Abstract: A rotational position measuring device for measuring a rotational position of a rotating shaft includes generating means for generating a sine wave signal and a cosine wave signal according to the rotational position of the rotating shaft; successive calculating means for successively calculating a sum of each square of the sine wave signal and the cosine wave signal generated by the generating means; change calculating means for calculating a change in the sums calculated by the successive calculating means; determining means for determining whether or not the change calculated by the change calculating means exceeds a predetermined value; and means for outputting a rotational position signal or an angular signal of the rotating shaft based on the sine wave signal and the cosine wave signal; wherein an abnormality signal is outputted when the determining means determines that the calculated change exceeds the predetermined value.

Abstract: In a grinding wheel comprising a disc-like core member and a ring-shape grinding wheel layer wherein superabrasive grains selected from cubic boron nitride particles and diamond particles are contained together with aggregates in a bonding material, the aggregates are made of porous ceramics particles and have an average particle size which is in a range of 70% to 150% relative to the average particle size of the superabrasive grains, and bridges made of the bonding material are formed between the aggregates adjoining to one another or between the aggregates and the superabrasive grains adjoining to the aggregates.

Abstract: A cage includes a radially inward-side annular plate, a radially outward-side annular wall, a plurality of pillar portions, and pockets formed in the pillar portions. Rollers are rotatably retained in the pockets. An inner peripheral surface of the radially outward-side annular wall is formed so as to be oblique toward a radially outward direction. A radially outward-side end surface of each of the rollers has a spherical surface shape.

Abstract: it is an object of the present invention to provide a differential limiting apparatus increasing the capacity of the clutch to obtain the enough large differential limiting force. The differential limiting apparatus comprising a housing 2 rotated by driving force of a driving source, a differential mechanism 3 having one pair of output gears 3A, 3B to distribute said driving force to one pair of output shafts differentially, a clutch 4 disposed directly between the one pair of output gears 3A, 3B and having the inner clutch plate 4A and the outer clutch plate 4B as an annular frictional plate to restrict a differential movement of the differential mechanism 3, and an output mechanism 5 driving said clutch 4, the output mechanism 5 includes a first cam 52C moved along an axial direction, and a pushing pin 35 as a transmitting member transmitting the axial movement of said first cam 52C to the clutch 4.

Abstract: A bearing device for a wheel includes an inner ring member including an inner shaft and an inner ring constituent member; an outer ring member; a rolling element; and a wheel-mounting flange formed on a peripheral surface of the inner shaft at a position close to an outer end portion in a vehicle-width direction; a hobbed portion formed on the peripheral surface at a position close to an inner end portion in the vehicle-width direction; and a coupler ring fitted to a periphery of the hobbed portion. A heat-treated portion of the peripheral surface extends from an inner portion of a base of the wheel-mounting flange in the vehicle-width direction, to a position which is offset from an outer edge of the hobbed portion in the vehicle-width direction toward an outer side in the vehicle-width direction by a predetermined distance, and at which heat treatment does not influence the hobbed portion.

Abstract: A detecting unit for detecting a torque applied to a rotor according to rotation of the rotor having an input shaft and an output shaft connected with each other by a torsion bar and a detection circuit board connected with the detecting unit are molded with synthetic resin material to form a mold member. The installation of the mold member into a housing, which has a cylinder portion to surround the rotor and a retainer having an opening formed at the peripheral wall of the cylinder portion, is achieved by inserting the mold member into the retainer from the radial direction through the opening of the retainer.

Abstract: A current sensor of a motor controller detects the current applied to a motor drive circuit and thus a phase where a failure cannot be detected would occur without taking any measures. However, an abnormal current monitor section contained in a microcomputer receives a voltage signal of an average value of the currents detected in the current sensor by allowing a signal to pass through a first LPF having a cutoff frequency sufficiently lower than the frequency of a PWM signal. Therefore, whether or not the value is within a predetermined normal range is checked, whereby whether or not some failure containing a failure of the current sensor occurs can be easily determined about every phase.

Abstract: A turbocharger includes a housing, and a turbine shaft supported in a center hole in the housing through rolling bearings. A tank portion for storing lubrication oil is formed in the housing, and the lubricating oil is supplied from the tank portion to the rolling bearings through wick members extending from the tank portion respectively to the rolling bearings. The wick member includes a bundle of fibers made of a plastics material, and a distal end portion thereof is separated into a fibrous condition, and this distal end portion is held in contact with the bearing. The lubricating oil is supplied to the bearing by a capillary action of the wick member.

Abstract: A microcomputer 18 includes a current restriction value calculation section 31 and a current restriction section 32. The current restriction value calculation section 31 calculates a motor current value corresponding to a maximum power supply current value, which has been set in advance. The current restriction value calculation section 31 then converts the motor electric current into a q-axis current value Iq and outputs the converted value as a current restriction value Iq_max. The current restriction section 32 restricts a q-axis current command value Iq* provided by a current command calculation section 23 to a value less than or equal to the current restriction value Iq_max. The current restriction section 32 then provides the restricted q-axis current command value Iq** to a motor control signal generation section 24.

Abstract: A main power supply and an auxiliary power supply for supplying power to a motor are provided. AMOS-FET for supplying power from the main power supply and a MOS-FET for supplying power from the main and auxiliary power supplies are provided. When a phenomenon in which a rotor of a motor is rotated by the going-back force of steered wheels occurs, and voltage VG of power generated by the motor satisfies the relation VG>VB+VC where VB is a voltage of the main power supply and VC is a voltage of the auxiliary power supply, a control circuit and a gate drive circuit turn off both MOS-FETs so as to charge the auxiliary power supply using the voltage VG through a parasitic diode of the MOS-FET.

Abstract: An angular contact ball bearing includes: an inner ring including a shoulder portion-side end surface; an outer ring which includes a counterbore-side smaller-diameter portion and a counterbore-side end surface disposed axially inwardly of the shoulder portion-side end surface of the inner ring; a plurality of balls arranged in a circular row between the outer ring and inner rings; a cage for holding the balls; and a cylindrical guide portion which is provided at and communicates with the counterbore-side smaller-diameter portion and guides a ball-cage assembly in which the balls and the cage are assembled together when the ball-cage assembly is inserted into the outer ring. When the ball-cage assembly is inserted into the outer ring disposed horizontally, the ball-cage assembly is supported by the counterbore-side smaller-diameter portion and is prevented from being inclined by the guide portion.

Abstract: A rolling bearing device includes a bearing housing supported on a casing of a turbocharger, and a pair of rolling bearings mounted within the bearing housing and rotatably supporting a turbine shaft. A middle position between the pair of rolling bearings in an axial direction and a central portion of the bearing housing in the axial direction are offset from each other in the axial direction. Each of the rolling bearings includes an inner ring, an outer ring, an intermediate ring interposed between the inner and outer rings, a row of rolling elements rollably interposed between the inner ring and the intermediate ring, and a row of rolling elements rollably interposed between the intermediate ring and the outer ring. The intermediate ring has a damper function to be very slightly displaced or very slightly deformed elastically so as to damp vibration produced during rotation of the turbine shaft.

Abstract: A signal generating section includes a second calculating section that corrects phase resistance. The calculating section stores resistance values of phases that have been measured in advance and a reference resistance value. The calculating section calculates correction components, which cancel a voltage drop term of a voltage equation of a d-q coordinate system changing depending on the rotation angle of the motor, based on the stored resistance values and the reference resistance value. The signal generating section superimposes the correction component and the correction component on a d-axis voltage command value and a q-axis voltage command value, respectively. The d-axis voltage command value and the q-axis voltage command value are thus corrected in such a manner as to suppress a torque ripple caused by difference among the resistance values of the phases.

Abstract: A torque sensor includes a first shaft, a second shaft that is coaxially linked to the first shaft, a cylindrical magnet that rotates integrally with the first shaft, a pair of magnetic yokes that rotate integrally with the second shaft, and three magnetic sensors that respectively detect a change in magnetic flux of the magnetic yokes for calculating torque applied to the first and second shafts. Output characteristics of the three magnetic sensors are different from each other.