Denso Corporation

Toyota Jidosha Kabushiki Kaisha

Nippon Soken, Inc.

Taku Itoh

Kiyoshi Kimura

Shigeru Yoshiyama

Masashi Hori

Shigeru Kamio

Yasuhiro Nakai

Tatsuya Ozeki

Yasuo Shimizu

Kazuo Kawaguchi

Sumiko Amamiya

Yuzuru Sudani

Atsushi Kamada

Seiji Nakayama

Yoshinobu Nozaki

Toshiki Fujiyoshi

Haruhiko Uno

Hideo Inaba

Akihiko Kameshima

Joji Yamaguchi

Mikine Kume

Kenichi Oishi

Masamichi Watanabe

A rotary actuator includes a rotation shaft rotatably driven by a motor, an internal gear provided on an outer side of the rotation shaft in a radial direction of the rotation shaft, a rotation output section provided between the rotation shaft and the internal gear in the radial direction to reduce a rotation speed outputted from the rotation shaft and to output a power in conjunction with the internal gear, a cylindrical housing portion fixed to the internal gear, and an attachment member integrated with an outer wall of the housing portion. The internal gear has a protrusion protruding from an outer wall of the internal gear, and the housing portion has a recess into which the protrusion is inserted. The attachment member has an attachment hole that is different from the recess in position in a circumferential direction of the housing portion.

Rotary actuator

A shift-by-wire (SBW) device includes a capacitor, which stores electric power. When an abnormality occurs in a battery or an electric power supply system, an actuator of the SBW device receives electric power from the capacitor and changes a shift range of an automatic transmission to a P range at least once. Furthermore, when a lever of a P range releasing arrangement is operated, the P range of the automatic transmission is released.

Shift-by-wire system

A reference position detecting apparatus includes an electric motor and a motor control unit. The electric motor includes a plurality of first coils and a plurality of second coils. The electric motor further includes a rotor that rotates when at least one of the plurality of first coils and the plurality of second coils is supplied with electricity. The motor control unit controls electricity supplied to either one of the plurality of first coils and the plurality of second coils to rotate the rotor to a limit position in a movable range of an object.

Position detecting apparatus having electric motor and method for detecting position

A rod-lock mechanism is provided in an automatic transmission for a vehicle. The rod-lock mechanism has an engaging pin which will be engaged with a rod when the rod is in its initial position, so as to hold the rod in its initial position. The rod-lock mechanism further has an electric actuator for driving the engaging pin when electric power is supplied, so that the engaging pin is brought out of engagement from the rod. A forced parking current supply unit controls electric power supply to the electric actuator. When the electric power is supplied to the electric actuator, the rod is moved in a direction of a parking position to bring a vehicle into a parking condition.

Shift range control apparatus

A plurality of concavities and convexities is provided on tips of all rotor teethof the SR motor. Depths of the concave portions &#x3b1; are deep on an edge side where a stator toothand rotor toothfirst approach and are shallow as a facing area between the stator toothand rotor toothincreases. Therefore, magnetic resistance between the stator toothand rotor toothbecomes high at an early stage of the stator toothand rotor toothfacing each other and becomes low as the facing area between the stator toothand rotor toothincreases. As a result, torque fluctuation can be suppressed at a time of a large current and a minimum generation torque can be increased at a time of a small current.

Switched reluctance motor

A shift-by-wire control system includes a parking lock device that brings an output shaft of an automatic transmission device to a lock state when a range switching unit switches to the P-range. The parking lock device brings the output shaft to a lock-release state when the range switching unit switches to another shift range. An electric motor actuates the range switching unit and the parking lock device in accordance with an instruction of an operator. A manual device transmits manual operation force of the operator to the parking lock device when the electric motor stops. The manual device includes a one-way transmission unit permitting transmission of the manual operation force in a direction toward the lock state, and prohibiting transmission of the manual operation force in a direction toward the lock-release state.

Shift-by-wire control system for automatic transmission device and method for the same

A shift range switching apparatus connects with a motor for switching a shift range of an automatic transmission. The shift range switching apparatus includes a switching unit that is operated by the motor for switching the shift range. The shift range switching apparatus further includes a control unit that outputs a driving current to the motor for switching the shift range to one of a P range, an R range, an N range, and a D range. The control unit controls the driving current at one of a plurality of set values in accordance with a switching pattern of the shift range. The switching pattern may be defined by a combination of two of the P range, the R range, the N range, and the D range.

Shift range switching apparatus and method for switching shift range

A shift range switching device is provided to a shift-by-wire system for an automatic transmission device. The shift range switching device includes a range switching unit for switching a shift range of the automatic transmission device between a P range and the other range. The shift range switching device further includes an actuator including an electric motor and a reduction device. The reduction device transmits driving force of the electric motor to the range switching unit for actuating the range switching unit as instructed. The reduction device has a variable reduction ratio. The reduction device transmits the driving force in switching of the shift range from the P range to the other range at a reduction ratio, which is greater than a reduction ratio in switching of the shift range from the other range to the P range.

Shift range switching device and method for switching shift range

A shift range switching apparatus includes an automatic transmission that includes a shift range switching device having a control rod for switching an actual shift range corresponding to rotation angle of the control rod. The shift range switching apparatus further includes an electric actuator that includes an output shaft connecting with the control rod. The electric actuator switches the actual shift range by rotating the control rod via the output shaft. The shift range switching apparatus further includes an assembly regulating device that allows the electric actuator to be detachable from and attachable to the automatic transmission when the actual shift range of the shift range switching device is set at a specific shift range.

Shift range switching apparatus and method for assembling the same

A shift control system rotates an actuator to cause a wall of a detent plate to contact a roller of a detent spring, and detects the position of contact so as to detect the position of the wall of the detent plate. This wall position is set as a reference position of the actuator. Accordingly, the rotation of the actuator can appropriately be controlled even if an encoder which can only detect relative positional information is employed, and thus the shift range can appropriately be switched.

Shift control system, shift control method and shift switching device

Shift control system, shift control method, and shift switching device

A brushless synchronous motor includes a stator having a plurality of phase coils, a rotor disposed opposite the stator, a magnetic sensor for detecting a rotation angle of the rotor, a power supply circuit connected to the phase coils, a control circuit for controlling the power supply circuit so that the motor rotates synchronously. In the above motor, a circuit board includes a wiring circuit connecting the phase coils with the power supply circuit, and the magnetic sensor is directly fixed to the circuit board so that dimensional variation of the magnetic sensor relative to the stator can be minimized.

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Chita-gun, Japan

Taku Itoh