JTEKT Patente

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A steering control device includes a command value setting processing portion configured to set a current command value based on a detection value of steering torque; a feedback processing portion configured to control a voltage applied to a motor (50) so as to control a current flowing through the motor (50) to the current command value, based on an output value of an integral element obtained by using a difference between the current and the current command value; an end determination processing portion configured to determine whether a turning angle of steered wheels (34) has reached a limit angle; and an end-time limit processing portion configured to perform correction to increase a magnitude of the difference, based on a degree of a decrease in a magnitude of a rotational speed of the motor (50) when the end determination processing portion determines that the turning angle has reached the limit angle.

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A steering control device includes a feedback processing portion configured to control a current flowing through a motor (50) to a current command value; an end determination processing portion configured to determine whether a turning angle of steered wheels (34) has reached a limit angle; and an end-time limit processing portion configured to limit a magnitude of the current command value to a magnitude of a limited current value or smaller, when the end determination processing portion determines that the turning angle has reached the limit angle. The limited current value is a value obtained by performing correction to decrease a magnitude of a detected value of the current flowing through the motor (50) at a time when the end determination processing portion determines that the turning angle has reached the limit angle, based on a degree of a decrease in a magnitude of a rotational speed of the motor (50).

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A driving force transmission apparatus (1) includes: a first cam mechanism (15) that converts rotational force from a housing (12) into first cam thrust force (P1) used as clutch force of a main clutch (8) when the first cam mechanism (15) is actuated through clutch action of a pilot clutch (10); and a second cam mechanism (16) that is actuated prior to conversion of the rotational force into the first cam thrust force by the first cam mechanism (15), and that generates second cam thrust force (P2) for reducing an interval between clutch plates of the main clutch (8). The second cam mechanism (16) includes an input cam member (160) that rotates upon receiving rotational force used as actuating force of the input cam member (160) from a cam actuating driving source (5), and an output cam member (161) that generates the second cam thrust force (P2) between the output cam member (161) and the input cam member (160) and outputs the second cam thrust force (P2).

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A warning device for a vehicle includes a warning vibration wave generator 44 and a vibration applying device 18. For each of a plurality of vehicle conditions, the warning vibration wave generator 44 generates a warning vibration wave having a frequency that varies with the vehicle speed detected by a vehicle speed sensor 23, and that differs for each vehicle condition at the same vehicle speed. Based on the warning vibration wave generated by the warning vibration wave generator 44, the vibration applying device 18 applies a warning vibration corresponding to the warning vibration wave to a steering member.

A mold for insert molding, which houses an electronic unit including a first circuit portion and a second circuit portion protruding from the first circuit portion, is prepared. The mold includes an upper wall surface facing an upper surface of the second circuit portion and side wall surfaces facing side surfaces of the second circuit portion. The flow resistance of a resin flowing through a space between each side surface of the second circuit portion and the corresponding side wall surface is lower than that of the resin flowing through a space between the upper surface of the second circuit portion and the upper wall surface. Then, the electronic unit is placed in the mold. A distance between each of the side surfaces of the second circuit portion and the corresponding side wall surface is longer than a distance between the upper surface of the second circuit portion and the upper wall surface. Then, the resin is injected into the mold in which the electronic unit has been placed. Thus, the electronic unit and the housing in which the electronic unit is housed are integrated with each other. Further, there is provided a housing structure that includes an electronic unit including a first circuit portion having an annular shape and a second circuit portion protruding radially outward from the first circuit portion, and a housing in which the electronic unit is housed, the housing being integral with the electronic unit, wherein the second circuit portion comprises a main body portion extending radially outward from the first circuit portion. The housing structure is further provided with a tapered portion protruding from the main body portion in a direction in which a central axis of the first circuit portion extends or a terminal extending radially outward from the main body portion and an extending portion extending to a position radially outward of the terminal.

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A motor control unit (1) controls an operation of a motor (2) connected to a wheel (4) via a clutch (3) that allows or interrupts torque transmission between the motor (2) and the wheel (4). The motor control unit (1) includes: a microcomputer (11) that outputs a motor control signal S_m; a driving circuit (12) that supplies driving electric power to the motor (2) based on the motor control signal S_m; and a capacitor (C) provided at an intermediate portion of a power supply line (Lp) that connects the driving circuit (12) and a driving power supply (15) to each other. The microcomputer (11) carries out electric discharge from the capacitor (C) by supplying electric power generated by electric charges stored in the capacitor (C) to the motor (2) such that torque is generated by the motor (2) and an angular velocity of the motor (2) becomes less than or equal to a prescribed angular velocity, with torque transmission between the motor (2) and the wheel (4) interrupted by the clutch (3), after a driving relay (16) is turned off.

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An electromagnetic clutch unit (3) includes: a friction mechanism (7) including a first friction member (70) and a second friction member (71); a lock sleeve (8) connected to an input shaft member so as to be non-rotatable relative to the input shaft member, and movable in an axial direction of the electromagnetic clutch unit between a first position at which the lock sleeve is engaged with only the input shaft member and a second position at which the lock sleeve is engaged with both an output shaft member and the input shaft member; and a pressing member (90) that constitutes a magnetic path extending over the pressing member and the second friction member, and that presses the lock sleeve with the electromagnetic force to move the lock sleeve from the first position to the second position.

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