Abstract: A power distribution control device 42 calculates a low-? information magnitude, associated with the friction coefficient of the road surface, based on the slip rate and the vehicle acceleration operation magnitude. If the low-? information magnitude exceeds an addition evaluation threshold, the power distribution control device 42 adds the low-? information magnitude. If the low-? information magnitude does not exceed the addition evaluation threshold, the power distribution control device 42 subtracts a constant K from a counter. The power distribution control device 42 makes evaluates a road to have a low-? when the counter exceeds a low-? evaluation threshold.

Abstract: According to the invention, there is provided a tapered roller bearing in which, where D represents a larger end diameter of the tapered roller and L represents a roller length thereof, the roller length L is 18 mm or smaller, and a ratio of the large end diameter and the roller length of the tapered roller which is expressed by D/L is in the range of 0.55 to 0.9. In addition, respective raceway surfaces of the outer ring and the inner ring and rolling contact surfaces of the tapered rollers are crowned, and a total crowning amount is set to be 50 ?m or larger, an outer ring crowning rate is set to be 40% or larger, and a roller crowning rate is set to be 20% or smaller.

Abstract: A lip portion consists of two cylindrical axial lips 421, 422 extended in parallel to an axial direction of a seal 4 and in different lengths (a radial lip is obviated). A neck 22 of a cross shaft 2 is formed with a neck slant portion 221 defined by a conical surface inclined at 45° relative to an axis thereof. The two axial lips 421, 422 are pressed against the neck slant portion in the axial direction.

Abstract: A control ON/OFF determination unit determines that oversteer control should be started in the case where a slip angle differential value is equal to or greater than a predetermined threshold value, the sign of the slip angle differential value is identical with the sign of a yaw rate, the sign of a steering wheel turning angle is identical with the sign of a steering wheel turning speed, and a vehicle speed is equal to or greater than a predetermined threshold value.

Abstract: A double row thrust roller bearing includes a pair of inner and outer cages arranged radially in two rows in separate coaxial relation, each cage including an annular inner peripheral wall, an annular outer peripheral wall, a plurality of pillar portions interconnecting the annular inner and outer peripheral walls at intervals in a circumferential direction thereof, and a plurality of pockets each formed between the adjacent pillar portions. Rollers are rotatably held and retained respectively in the pockets. The annular inner peripheral wall of the inner cage is guided by an annular flange formed at an inner peripheral edge of one race, and the annular inner peripheral wall of the outer cage is guided at an inner periphery thereof by the annular outer peripheral wall of the inner cage.

Abstract: A split bearing which is divided in two is formed of a rolling bearing, and its outer ring is provided with ribs at both side parts thereof in an axial direction. An integrating mechanism is provided at a position within a range in the axial direction where this rib is formed. The integrating mechanism include a concave groove in an annular shape which is formed on a side surface of the rib, and a C-shaped ring is engaged with this concave groove, whereby upper and lower split outer ring pieces of the divided outer ring are integrated into a preassembled state.

Abstract: Guide grooves for guiding lubricating oil from a small rib-side end portion of an inner ring to a large rib-side end portion thereof are formed at an inner periphery of a cage.

Abstract: In a hydraulic power steering apparatus, hydraulic pressure for generating steering assist power is varied by varying opening of a variable throttle portion by movement of a spool. The spool is disposed in a provisional origin by driving a stepping motor in one direction according to a number of steps for setting provisional origin from a position at a time of start of control, and the number of steps at a time of completing of the driving is set to a provisional origin for calculation. In a return to origin permission state where the spool is disposed in a provisional origin and the number of steps from the provisional origin for calculation is zero, a number of steps at a time when the driving of the stepping motor according to a number of steps obtained by subtracting the number of steps for setting provisional origin from a number of steps for setting origin is completed is set to an origin for calculation, and the movement of the spool is stopped at the origin with a stopper.

Abstract: The large diameter cage has an asymmetric shape, a diameter (discharge diameter) of which close to an opening is larger than a diameter (inflow diameter) close to the small diameter cage, and the small diameter cage has a symmetric shape, in which a diameter (inflow diameter) of which close to an opening is equal to a diameter (discharge diameter) close to the large diameter cage.

Abstract: A shock absorbing steering apparatus for motor vehicle includes an intermediate shaft including first and second ends. The intermediate shaft includes a hollow bellows portion having convexes and concaves alternating with each other. The convexes include at least one slant convex. A plane including a ridge line of the slant convex is tilted to a perpendicular plane perpendicular to a center axis of the intermediate shaft. As a result, a part of an axial force exerted on the intermediate shaft at a motor vehicle collision is converted to a bending force on the intermediate shaft.

Abstract: A vehicle steering apparatus 1 includes an EPS actuator 17 and an EPS ECU 18 that controls the EPS actuator 17. The EPS actuator 17 applies an assist force that assists a steering operation. A microcomputer 43 of the EPS ECU 18 determines whether the currently executed oversteer control (OS control) is being intensified or converged. In the OS control intensification state, in which the vehicle stability is low, the microcomputer 43 reduces a damper compensation current command Idp* (Idp**), which is a damper compensation component for attenuating a steering wheel turning speed ?s.

Abstract: A power transmission chain (1) has long metal links (2) and connection members (200) including first and second pins (3, 4). The longitudinal direction of the long links (2) is along the travel direction (X1) of the chain. The longitudinal direction of the first and second pins (3, 4) is along the width direction (W1) of the chain. The links (2) and the first and second pins (3, 4) form fiber flows (41, 43), each extending in a predetermined direction. The predetermined direction is parallel to or intersects the lengthwise direction of the links (2) and the first and second pins (3, 4) where the fiber flows (41, 43) are formed at a predetermined angle or smaller.

Abstract: In a rough grinding step the large quantity of coolant supplied to cool the grinding point enables the flow to pass through a wheel-following air layer and reach the grinding point while the supply of an air jet is stopped during this step. At a fine grinding step, the grinding point can be cooled with a small quantity of coolant in so far it is reliably supplied to the grinding point. This is realized by supplying an air jet to intercept the wheel-following air layer which rotates to follow the grinding wheel, while supplying the coolant in small quantity. Consequently, the coolant is prevented from being scattered by the air jet and suspended in form of mist when supplied in large quantity at the rough grinding step, and the coolant quantity used can be reduced at fine grinding step and minute grinding step.

Abstract: A vehicle steering apparatus 1 includes a variable gear ratio actuator 7, an IFS ECU 8, which controls the actuator 7, an EPS actuator 17, and an EPS ECU 18, which controls the EPS actuator 17. The variable gear ratio actuator 7 varies the transmission ratio between a steering wheel and steered wheels. The EPS actuator 17 applies an assist force that assists a steering operation. A microcomputer 43 of the EPS actuator 17 increases an inertia compensation current command Iti* (Iti**), which is a compensation component based on the differential value of a steering torque, during actuation of the variable gear ratio actuator 7, that is, when an ACT angle ?ta is changed.

Abstract: A differential gear apparatus according to the present invention comprises a first sun gear coupled to a first shaft to be rotated in conjunction with the first shaft, a second sun gear coupled to a second shaft to be rotated in conjunction with the second shaft, a first planetary gear meshed with the first sun gear, a second planetary gear rotated with the first planetary gear and meshed with the second sun gear, a carrier supporting the first and second planetary gears, and a housing supporting the second shaft upon rotation, wherein the sun gears and the planetary gears have profile shifted teeth of which addendum modifications are different at the positions in a flank width direction and a nut screwed on the mid way of the second shaft, and a through hole disposed at a position facing the nut are provided.

Abstract: A motor control device for controlling a d-axis current and a q-axis current on dq coordinates to control a motor, includes a q-axis current command value setting unit which sets a q-axis current command value, an upper limit/lower limit setting unit which sets an upper limit and a lower limit of the q-axis current, a comparing unit which compares the q-axis current command value set by the q-axis current command value setting unit and the upper limit and the lower limit set by the upper limit/lower limit setting unit, a q-axis current command value limiting unit which puts a limit on the q-axis current command value in accordance with a comparison result by the comparing unit, and a d-axis current command value setting unit which sets a d-axis current command value on the basis of the q-axis current command value limited by the q-axis current command value limiting unit.

Abstract: In a control method for an electric power steering apparatus having a steering member, a steering mechanism, and a motor for assisting steering, a steering torque applied to a steering wheel is detected, frequency analysis is performed on the detected torque, and a determination is made as to whether or not a torque component having a frequency equal to or higher than a predetermined value is included in the result of the frequency analysis. When such a torque component is included in the frequency analysis result, a predetermined rotary torque is generated in a single direction.

Abstract: An apparatus and method for grinding a workpiece by rotating the workpiece about a rotational axis, rotating a cylindrical grinding wheel about a rotational axis being parallel to the rotational axis of the workpiece, moving the grinding wheel relative to the workpiece at least in one of a first direction being perpendicular to the rotational axis of the workpiece for grinding the workpiece at a cylindrical surface of the grinding wheel and a second direction being parallel to the rotational axis of the workpiece for grinding the workpiece at an end surface of the grinding wheel being perpendicular to the rotational axis of the grinding wheel, and by superimposing a vibration signal including a plurality of frequency components to a driving signal outputted to one of a workpiece rotating means for rotating the workpiece and a grinding wheel rotating means for rotating the grinding wheel.

Abstract: A power transmitting device includes a front housing member, an inner shaft, and a main clutch that selectively permits and shuts off transmission of torque between the front housing member and the inner shaft. The power transmitting device is rotatably supported by a bearing arranged outside the front housing member. An intermediate member having a thermal expansion coefficient lower than the thermal expansion coefficient of the front housing member is arranged between the front housing member and the bearing.

Abstract: An electric power steering device is provided which is excellent in the nature being mounted on a vehicle. The electric power steering device 1 comprises a rack shaft 20 constructed to be movable reciprocatively, a rack housing 10 receiving the rack shaft 20 therein, a sleeve 41 arranged coaxially around the rack shaft 20, a brushless motor 40 taking a generally cylindrical shape and constructed to rotate the sleeve 41, and a rotational angle sensor 50 constructed to detect the rotational angle of the brushless motor 40. The rack housing 10 has arranged thereon a power connecter 42 for supplying electric power to the brushless motor 40 and a sensor connecter 52 for outputting a detection signal of the rotational angle sensor 50. The power connecter 42 and the sensor connecter 52 are arranged to be shifted on the same side in the axial direction of the rack shaft 20 with respect to the brushless motor 40.