Jtekt Corporation

Koyo Seiko Company, Ltd.

Ken Matsubara

Shigeki Nagase

Naotake Kanda

Nobuhiro Uchida

Kunihiro Oka

Katsutoshi Nishizaki

Yoshikazu Kuroumaru

Takeshi Ueda

Masahiko Sakamaki

Toshiaki Oya

Shirou Nakano

Minoru Sentoku

Motoo Nakai

Kouya Yoshida

Yasuyuki Yoshii

Yuji Kariatsumari

Shiro Nakano

Tatsuma Kouchi

Masanori Arima

Hideki Higashira

Minoru Kitabayashi

Tomofumi Takahashi

Tetsuo Horie

Yuichi Miura

Noboru Niguchi

Yasuhiro Saitou

Takayasu Yamazaki

Yasuhiko Hasuda

Yasuhiro Kamatani

Shinsuke Terada

Toshimasa Soku

Yasuyuki Yoshi

Takeshi c/o Jtekt Corporation Ueda

Yasuhiro c/o Jtekt Corporation Saitou

In a warning device for a vehicle, a basic target current value setting unit sets a basic target current value based on a steering torque and a vehicle speed. When a lane deviation determining unit determines that there is a high possibility that a vehicle will deviate from a lane, a warning vibration wave generator generates a warning vibration wave containing a plurality of frequency components. A target current value is computed by adding the warning vibration wave to the basic target current value. A motor current to be applied to an electric motor is controlled so as to approach the target current value.

Warning device for vehicle

A vehicle includes: a pair of front wheels; a pair of rear wheels; a front-wheel motor configured to drive the front wheels; a rear-wheel motor configured to drive the rear wheels; and a reducer configured to reduce a rotation speed of one of the front-wheel motor and the rear-wheel motor, and transmit drive power to the wheels driven by one of the motors. The one of the front-wheel motor and the rear-wheel motor is a motor with a rotation speed higher and torque lower than those of the other one of the motors.

Vehicle and vehicle driving device

The invention provides a motor including: a cylindrical motor case having a bottom that supports an outer circumferential surface of a stator core by an inner circumferential surface thereof; and a bracket that supports an output shaft side bearing and closes an opening of the motor case; wherein the stator core is press-fitted into the motor case from the opening such that a part of the stator core is exposed from the motor case, and a part of the stator core that is not press-fitted to the motor case forms a sliding fitting wall capable of providing a sliding fitting connection with the bracket.

Motor and electric power steering system

An electric power steering apparatus () comprises a control device (), which controls driving of an electric motor () based on the detection signals from a rotational position-detecting sensor (A), which detects the rotational position of the rotor () of the electric motor (), and a steering status detecting sensor (A). The control device () is housed in a housing () that is partitioned by a first housing (), which is at least a portion of the motor housing () for the electric motor (), and a second housing (A;B) that touches the first housing (). At least one of the rotational position-detecting sensor (A) and steering state detecting sensor (A) is connected to the control device () by means of only a signal wire () inside the first housing () or the second housing (A;B).

Vehicle steering apparatus and manufacturing method of same

Disclosed is a vehicle steering apparatus () equipped with a control device () which controls the actuation of an electric motor (). First and second housings (), which are in contact with each other, partition off an accommodation chamber () which contains the control device (). The first housing () is at least one part of the motor housing (). The first housing () includes a first interior wall surface () which partially partitions the accommodation chamber (). The second housing () includes a second interior wall surface () which partially partitions the accommodation chamber (). The first and the second interior wall surfaces () are opposite each other with respect to the axial direction (X) of a rotatable shaft () of an electric motor (). The second interior wall surface () includes the flat annular surface that surrounds a central axis (C) of the rotatable shaft () and an extension (C) of the central axis (C). The flat circular surface is orthogonal to the central axis (C) and the extension (C) of same.

Vehicle steering apparatus

A rotary shaft of a rotor including a magnet with a plurality of magnetic poles arranged at equal intervals on an outer circumference is supported at both ends by bearings. By externally fitting the inner ring of one bearing to the rotary shaft and holding it to be immovable in an axial direction and loosely fitting the outer ring of the bearing into the support hole and positioning it with belleville springs which are in contact resiliently with both sides, the rotary shaft and the rotor are supported so that they are movable in an axial direction within a movement amount of not greater than 2 mm according to a movement of the bearing caused against spring forces of the belleville springs.

Brushless motor

It is an object of the present invention to provide an electric power steering apparatus to be small and compact. The control housingis installed between the motor housingof the electric motorand the gear housingThe ECU controlling the electric motoris accommodated in the accommodating room S formed within the control housingThe motor housingaccommodates the bus barconnected to the coilof the statorand the resolverdetecting the rotational position of the rotorThe resolveris installed within the bus bar mounting memberin inner side of radial direction. The partitionis mounted on the control housingand the fixing screwis engaged with the insulating memberby the way that the fixing screwis inserted into insulating memberfrom its bottom surface side.

Electric power steering apparatus

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.

Motor controller and electric power steering system

An electric power steering system is provided which is capable of providing a favorable steering feeling without using compensation logics such as of inertia compensation and friction compensation. The electric power steering system includes road-noise suppression control means () for controlling a steering assist motor () in a manner to damp torque transmission in a higher frequency region representing road noises than a frequency region representing road information. A friction value of a steering mechanism (A) is decreased enough to allow the intrinsic vibrations of the steering mechanism (A) to appear. Rotor inertia of the steering assist motor () is set to a value small enough to allow the frequencies of the intrinsic vibrations to be present in the frequency region where the torque transmission is damped by the road-noise suppression control means ().

Electric power steering system

Power steering actuator

An electric power steering assembly includes an electric motor, a reduction mechanism for reducing the speed of an output rotation of the electric motor, and a reduction-mechanism housing accommodating therein the reduction mechanism. The electric motor includes: an output shaft rotatably supported by the reduction-mechanism housing, a motor housing formed integrally with the reduction-mechanism housing, a rotor, and a stator assembly accommodated in an annular space defined between the rotor and the motor housing. When the stator assembly is assembled in the annular space via an opening at an end portion of the motor housing, a guided portion on an outside circumference of a stator yoke is guided by a guide portion on an inside circumference of the motor housing.

Electric power steering assembly

A first alternating signal of which phase changes according to changes in the rotation angle of a first shaft is output, and a second alternating signal of which phase changes according to changes in the rotation angle of a second shaft capable of rotating elastically with respect to the first shaft is output. A phase difference correspondence signal of which waveform changes according to changes in the phase difference between the first alternating signal and second alternating signal is output. A value corresponding to the torque transmitted by the first and second shafts is found from the phase difference correspondence signal.

Torque sensor

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Matsubara, Japan

Ken Matsubara