Abstract: An ECU of a four wheel drive vehicle controls a transmission torque of a driving force transmission apparatus provided between a rear differential and a left rear wheel. The ECU includes a first computation unit that computes a command torque to be transmitted to the left rear wheel by the driving force transmission apparatus, based on a traveling state of the four wheel drive vehicle; and a second computation unit that corrects the command torque computed by the first computation unit, if a difference between rotation speeds of a pair of side gears of the rear differential is larger than or equal to a predetermined value.

Abstract: A flaw detection testing device that carries out a flaw detection test on an outer peripheral surface of a clinched portion used to fix an inner ring member of a hub unit to a hub spindle includes: a flaw detection sensor; a clearance setting member that contacts the outer peripheral surface of the clinched portion to set a clearance between the flaw detection sensor and the outer peripheral surface of the clinched portion at a predetermined value; a fixing device that fixes a position of the flaw detection sensor with the clearance between the flaw detection sensor and the outer peripheral surface kept at the predetermined value; and an actuating device that moves the clearance setting member in such a direction that the clearance setting member is separated from the outer peripheral surface of the clinched portion with the position of the flaw detection sensor fixed by the fixing device.

Abstract: There is provided a spline telescopic shaft having first and second shafts that are fitted to each other slidably in an axial direction. First and second splines that engage with each other are respectively provided in the first and second shafts. A resin coating that is provided on at least a tooth surface of the first spline is fitted to a tooth surface of the second spline. The resin coating is subjected to heat fitting processing for sliding the first and second shafts in the axial direction under predetermined conditions, to fit a surface of the resin coating to the tooth surface of the second spline.

Abstract: Through-holes are formed in an axially intermediate portion of a cylindrical portion of a first metal core, at predetermined intervals in a circumferential direction, and the through-holes pass through the cylindrical portion in a radial direction. A first elastic seal has a lip that is in sliding contact with an outer peripheral face of a cylindrical portion of a second metal core, a first cylindrical portion that is in close contact with an inner peripheral face of an axially inner-side portion of the cylindrical portion of the first metal core, a second cylindrical portion that is in close contact with an outer peripheral face of an axially outer-side portion of the cylindrical portion of the first metal core, and connecting pieces that are inserted into the through-holes of the cylindrical portion of the first metal core and that connect the first cylindrical portion with the second cylindrical portion.

Abstract: A resolver includes three resolver coils, which are arranged spaced apart in a circumferential direction of a rotor, and an excitation coil that generates a magnetic field to induce voltages in the resolver coils when receiving electric power. When the magnetic fields provided from the excitation coil to the three resolver coils are changed through rotation of the rotor, the voltages induced in the resolver coils are changed. This causes each of the three resolver coils to output three-phase signals having amplitude that changes in a sinusoidal manner with respect to the rotational angle of the rotor. The angular intervals between the corresponding adjacent pairs of the first to third resolver coils in the circumferential direction of the rotor are defined as first, second, and third division angles. Specifically, the first to third division angles are set to values different from one another.

Abstract: In a hydrostatic fluid guide device, a damping mechanism is provided. A fluid is supplied to the damping mechanism by a hydrostatic pressure caused by natural fall, instead of being pressurized and supplied. Thus, it is possible to suppress a decrease in the pressure of the fluid in a hydrostatic fluid guide mechanism, and to position a movable body with high accuracy by setting rigidity for load support during linear movement of the movable body to a value substantially equal to a design value.

Abstract: In a phase difference detector, a first phase difference computation unit computes a value of E(i)·C corresponding to one and the same given magnetic pole sensed by the two magnetic sensors with use of six output signals sampled at three different timings while the two magnetic sensors are sensing the given magnetic pole when a rotary body is rotating. E is an angular width error correction value, and C is a phase difference between two signals. The first phase difference computation unit executes this process until values of E(i)·C corresponding to all the magnetic poles are computed. After that, the first phase difference computation unit computes the phase difference between the output signals with use of the values of E(i)·C corresponding to all the magnetic poles and the number (m) of the magnetic poles.

Abstract: Rotation angle computation modes include a normal mode and a simple mode. In normal mode, a rotation angle of an input shaft is computed based on output signals from first and second magnetic sensors, which are sampled at two sampling timings. In simple mode, the rotation angle of the input shaft is computed based on the output signals from the first and second magnetic sensors, which are sampled at one sampling timing, and an amplitude ratio between the output signals from the magnetic sensors set in advance. After a power supply is turned on, the rotation angle is computed in the simple mode until a condition that the rotation angle of the input shaft can be computed in the normal mode even if the immediately preceding value of the rotation angle of the input shaft is not present is satisfied. Then, the rotation angle is computed in the normal mode.

Abstract: In a rotation angle detection device, each of an angular interval between a first magnetic sensor and a second magnetic sensor and an angular interval between the second magnetic sensor and a third magnetic sensor is 60° in electrical angle. When two magnetic sensors including the second magnetic sensor among the three magnetic sensors are operating properly, if the two properly operating magnetic sensors including the second magnetic sensor sense one and the same magnetic pole for a prescribed number of multiple consecutive sampling periods, the rotation angle is computed based on the output signals from the two magnetic sensors. When only the second magnetic sensor malfunctions, if the first and the third magnetic sensors sense one and the same magnetic pole for the prescribed number of multiple consecutive sampling periods, the rotation angle is computed based on the output signals from the two properly operating magnetic sensors.

Abstract: A pressure reducing valve comprises an open-close valve and a piston. The open-close valve makes switching between connecting and isolating a primary port and a secondary port. The piston makes sliding motion inside the cylinder according to a difference between force applied from the pressure regulating chamber and force applied from the pressure reducing chamber, thereby opening and closing the open-close valve. The open-close valve includes a valve stem and a valve seat fixing member. The valve seat fixing member restrains displacement of the piston toward a side upstream of the open-close valve by abutting on an end surface of the piston. The valve seat fixing member includes a channel hole communicatively connecting a housing part for the valve stem and the pressure reducing chamber.

Abstract: In a rotation angle detection device, when a condition that two sensors among three magnetic sensors sense one and the same magnetic pole for three consecutive sampling periods is satisfied, a rotation angle is computed based on output signals from the two sensors, sampled at three sampling timings. When the output signals sampled at the three sampling timings satisfy a prescribed requirement, an angular width error correction value corresponding to the magnetic pole sensed by the two sensors and amplitudes are computed, and stored in association with the magnetic pole. If the condition is not satisfied, the rotation angle is computed based on the information stored in a memory and the output signals from two sensors among the three magnetic sensors, the two magnetic sensors including one of the three magnetic sensors, which detects the magnetic pole of which the angular width error correction value is stored in the memory.

Abstract: A state detection device according to the invention includes a strain gauge that detects a physical state of a tapered roller, and a processing portion that obtains a detection signal that is output from the strain gauge, performs processing on the detection signal, and transmits detection data obtained by performing the processing on the detection signal, to an outside. The strain gauge and the processing portion are accommodated in a through-hole formed at an axis center of the tapered roller.

Abstract: A PLC communication system includes a PLC; a plurality of devices; three or more communication processing nodes that are provided respectively in the PLC and the devices to allow the PLC to communicate with each of the devices; and a plurality of communication lines that connect the communication processing nodes to each other to allow data communication. The PLC detects an incommunicable state between two of the communication processing nodes. The PLC communication system further includes a display device, and in a case where there are a plurality of types of incommunicable states detected by the PLC, the display device displays a portion where communication lines constituting the incommunicable states among the plurality of communication lines overlap with each other, as a line failure portion.

Abstract: Sinusoidal signals (S1, S2) having a phase difference of 120° are output from two magnetic sensors in accordance with rotation of an input shaft. A first rotation angle computation unit computes a rotation angle ?(n) on the basis of output signals S1(n), S1(n?1), S2(n), S2(n?1) from the magnetic sensors, which are sampled at two sampling timings. At this time, the first rotation angle computation unit computes the rotation angle ?(n) on the assumption that there are no variations of amplitudes of the output signals (S1, S2) from each one of the two sensors due to temperature changes between the two sampling timings.

Abstract: A driving force transmission control apparatus includes a multiple disc clutch including a plurality of outer clutch plates, and a plurality of inner clutch plates; a pressing mechanism that presses the multiple disc clutch; and a control portion that controls the pressing mechanism. The outer clutch plates and inner clutch plates are engaged with an intermediate shaft and an inner shaft respectively. The control portion makes a determination as to whether the multiple disc clutch is in a first operating condition in which the multiple disc clutch is pressed with a relative rotation speed between the intermediate and the inner shafts being equal to or higher than a predetermined value, or in a second operating condition in which the multiple disc clutch is pressed with the relative rotation speed being lower than the predetermined value, and the control portion controls the pressing mechanism based on a result of the determination.

Abstract: A rolling bearing device for a wheel includes a fixed bearing ring in a tubular shape which is fixed to a vehicle side, and a rotary bearing ring which is rotatably passed through the fixed bearing ring, and includes a plurality of flange portions for mounting the wheel formed on an outer periphery at one end side thereof in an axial direction, and a spigot joint portion in an annular shape protruding in the axial direction formed in a one end part thereof in the axial direction. A circular recess is formed in the one end part of the rotary bearing ring in the axial direction. Thick wall parts for reinforcement are formed on an inner peripheral surface of the spigot joint portion at positions corresponding to regions between a part between the respective flange portions.

Abstract: A steering column device includes a tilt bracket that is fixed to a vehicle body, and a telescopic bracket that is fixed to a column jacket. A lock mechanism includes a fastening shaft that is inserted through a first side plate and a second side plate of the tilt bracket, and a third side plate and a fourth side plate of the telescopic bracket, and achieves tilt locking and telescopic locking by fastening the third and fourth side plates by using the first and second side plates. Tilt friction plates and telescopic friction plates are provided separately from each other on right and left sides of the tilt bracket, respectively.

Abstract: A flanged coupling member is provided with a shaft portion to which a drive force is input, and a flange portion formed in one end of the shaft portion. The flanged coupling member is coupled to a front housing member with a bolt in which a shaft portion thereof is coaxially arranged in a front housing member and a flange portion contacts an outer surface in an axial direction of a bottom portion of the front housing member. The flange portion is provided with a tubular engagement portion that extends in an axial direction from an outer peripheral edge thereof. The engagement portion is arranged on an outer circumference of the front housing member on the basis of the fastening, and the engagement portion and the front housing member are engaged via a spline. The flanged coupling member is fastened to the front housing member at the shaft portion.

Abstract: A hydrostatic guide device includes: a fixed member having vertical guide faces; a movable member having vertical slide faces; a fluid supply device; a hydrostatic pocket to which a first fluid pressure based on a dimension of a gap is applied, and that urges the movable member with a first urging force; and a hydraulic pocket to which a second fluid pressure based on a dimension of a gap is applied, and that urges the movable member with a second urging force. A variation of the second fluid pressure is smaller than a variation of the first fluid pressure. When the first urging force and the second urging force are balanced with each other in a horizontal direction, the gap between the vertical guide face and the vertical slide face becomes a set value.

Abstract: A two-phase motor with high space utilization efficiency is provided for driving a hydraulic control valve. A valve drive motor includes a rotor and a stator surrounding the rotor. The rotor has six magnetic poles. The stator includes six stator windings. The U-phase first stator winding and the V-phase first stator winding constitute a pair of two-phase stator windings. The U-phase second stator winding and the V-phase second stator winding constitute a pair of two-phase stator windings. The U-phase third stator winding and the V-phase third stator winding constitute a pair of two-phase stator windings. The two stator windings of each pair are disposed at an angular interval of 180 degrees in terms of an electrical angle.