Denso Corporation

Tsubakimoto Chain Company

Toyota Jidosha Kabushiki Kaisha

Jtekt Corporation

Denso Corpora Tion

Tsubakimoto Kogyo Co. Ltd.

Toshimitsu Sakai

Masaya Taki

Shuji Kuramitsu

Takaharu Kozawa

Katsuhiko Hayashi

Koichi Nakamura

Toshihiro Fujita

Kouichi Nakamura

Atsuko Oka

Yuki Watanabe

Shuhei Miyachi

Hideki Kabune

Shoichiro Komiya

Atsushi Sato

Masaharu Yamashita

Yuji Fujita

Nobuyori Nakajima

Yosuke Yamashita

Takayuki Matsuda

Hiroki Ishida

Shunji Sakura

Shintaro Takayama

Kenichi Abe

Masataka Okuda

Yosuke Ogi

Tsutomu Iwami

Toshiyuki Mikida

Masashi Nakamura

Tamaki Shiki

Shoji Kubota

Yasuhide Nakamura

Michiyo Mizumoto

Syunji Sakura

Ryuta Shoji

Shunsuke Hiromasa

Michiya Hashino

Koutarou Nakashima

Shinji Hishioka

An engagement chain includes a pair of first and second chain members that are engaged so as to be integrated with each other by moving in an advancing direction and disengaged from each other so as to bifurcate by moving in a retreating direction from the integrated engaged state. A first link plate of the first chain member includes first and second pin holes through which a coupling pin is inserted. A second link plate of the second chain member includes first and second pin holes through which a coupling pin is inserted. A first distance between the first and second pin holes of the first link plate is shorter than a second distance between the first and second pin holes of the second link plate.

Mating chain and movable body transfer device

An actuator that applies force to a member associated with steering, and a control device that controls the actuator, have duplex configuration. First and second control devices compute the same controlled variable as first and second controlled variables, respectively. In a normal mode, the control device controls the actuator according to the first controlled variable. The first and second control devices send and receive respectively computed controlled variables to and from each other via communications. When a discrepancy arises between the first and second controlled variables, or an abnormality occurs in communications between the first and second control devices, the operating mode is switched from the normal mode to an independent mode. In the independent mode, the first and second control devices control the first and second actuators, according to the first and second controlled variables, respectively.

Steering control system

A steering angle detection device includes plural control units and plural steering angle sensors. Each control unit is configured to transmit steering angle information related to a steering angle of a vehicle to an external device and transmit and receive information mutually therebetween. Each steering angle sensor is provided in correspondence to each control unit and configured to output a sensor signal corresponding to a detection value of a change in the steering angle to the corresponding control unit. One of the control units transmits, as a transmission control unit, the steering angle information to the external device at one transmission timing.

Steering angle detection device and electric power steering device using same

An ECU, which is a signal control apparatus, has a plurality of control units, which control one same motor. Steering angle calculation units acquire sensor signals from the angle sensors provided corresponding to the steering angle calculation units, respectively, and calculate the steering angles in correspondence to the sensor signals. The angle FB units perform the angle FB control based on the angle differences, which are between the target angle and the steering angle and between the target angle and the steering angle, respectively. In the angular FB unit of at least one of the control units, the angular feedback control is performed using the angle difference, which is subjected to the correction processing to reduce the error between the detection angle of the own system and the detection angle of the other system calculated by the steering angle calculation unit of the other control unit.

Signal control apparatus and electric power steering apparatus using same

An ECU includes a plurality of motor driving circuits for driving at least one motor, a plurality of computers and a plurality of clock circuits. A first computer, which is at a synchronization signal transmission-side, transmits a synchronization signal to a second computer, which is at a synchronization signal reception-side. The first computer and the second computer execute a plurality of specific periodic processes, which are processes executed at cycle periods (for example, 200 &#x3bc;s, 400 &#x3bc;s) of different natural number multiples of a cycle period (for example, 200 &#x3bc;s) of the synchronization signal and need be synchronized. Each timing of the plurality of specific periodic processes is determined based on one synchronization signal.

Motor control apparatus and motor driving system

A steering angle detection device is provided with a plurality of rotation angle sensors and a plurality of control units. The rotation angle sensors are capable of at least continuously calculating a rotation speed while an ignition switch of a vehicle is turned off, and are provided so as to correspond to steering angle calculation units which calculate steering angle based on the rotation speed and a rotation angle acquired from the rotation angle sensors and midpoint information related to the neutral position of a steering member. Power supplies are provided on a per-system basis. The rotation angle sensors or the control units are capable of holding the midpoint information while the ignition switch is turned off. If a power supply abnormality resulting in power supply failure occurs in some of the systems, the control unit of the abnormal system acquires the midpoint information and the rotation speed from the control unit of a normal system when the ignition switch is turned on.

Steering angle detection device

A synchronization signal generating portion of a transmitter microcomputer generates a synchronization signal that is synchronized with a drive timing of the own microcomputer and also causes to synchronize the drive timing of microcomputers, and transmits to a receiver microcomputer. A timing corrector of the receiver microcomputer is capable of correcting the drive timing of the own microcomputer so as to synchronize with the received synchronization signal, and includes a timing determiner which determines whether the received synchronization signal is normal or abnormal. The receiver microcomputer permits the timing correction if the synchronization signal is determined to be normal in the timing determination, and prohibits timing correction and drives the motor asynchronously with the transmitter microcomputer if the synchronization signal is determined to be abnormal.

Motor control apparatus, motor drive system, and motor control method

In a rotation detecting apparatus, each of first and second sensor elements measures rotation of a detection target. A circuit module includes first and second rotational angle calculators each calculating, based on a corresponding one of a first measurement value of the first sensor element and a second measurement value of the second sensor element, a rotational angle of the detection target. The circuit module includes first and second rotation number calculators each calculating, based on the corresponding one of the first measurement value and the second measurement value, a rotation number of the detection target. The circuit module includes first and second communicators each outputting, to a controller, a rotational angle signal based on the rotational angle and a rotation number signal based on the rotation number. A package packages the first and second sensor elements, and is mounted to a circuit board separately from the controller.

Rotation detecting apparatus and electric power steering apparatus using the same

A rotary electric device control device controls driving of a rotary electric device including a plurality of winding sets. The rotary electric device control device includes: a plurality of drive circuits; and a plurality of control units. The control units include signal output units for outputting control signals to the drive circuits corresponding to the control units, respectively, and communicate with each other. The control units include: one master control unit; and at least one slave control unit. An electric power steering device includes: a rotary electric device control device; the rotary electric device that outputs an assist torque for assisting a steering operation of a steering wheel by a driver; and a power transmission unit that transmits a driving force of the rotary electric device to a drive target.

Rotary electric device control device and electric power steering device

A sensor device includes a sensor section having a plurality of sensor elements sensing a physical quantity regarding a magnetic flux collecting module, an output circuit generating and outputting an output signal including data signals respectively corresponding to sensing values from the sensor elements, and an ECU obtaining the output signal. The ECU includes an abnormality determiner identifying an abnormal sensor element. When at least two of the plurality of sensor sections respectively have at least one normal sensor element, a sub-sensor section transmits the output signal therefrom to the ECU at a shifted output timing from an output timing of the output signal from a main sensor section. The amount of such a shift of the output timing is shorter than one signal cycle of the output signal.

Sensor device and electric power steering apparatus using same

A motor control apparatus includes: multiple motor drive circuits that drive at least one motor; and multiple microcomputers that are operated by a microcomputer power source and include a drive signal generator that generates a motor drive signal. The microcomputers include at least one microcomputer including a stop determiner that determines that operation of an own microcomputer is about to be stopped and transmits information as a stop determination signal. A microcomputer having received the stop determination signal from at least one different microcomputer actually stops operation of an own microcomputer.

A motor control apparatus include: multiple motor drive circuits that drives at least one motor; multiple microcomputers that include a drive signal generator, and a drive timing generator; and multiple clock generation circuits. The microcomputers include a synchronization signal transmitter microcomputer as at least one microcomputer that transmits a synchronization signal synchronized with the drive timing of an own microcomputer and synchronizing the drive timing of the microcomputers. The microcomputers include a synchronization signal receiver microcomputer as at least one microcomputer that receives the synchronization signal transmitted from the synchronization signal transmitter microcomputer.

In a rotation detecting apparatus, while a switch is in an on state so that electrical power is supplied from a power source to a controller via the switch, the controller receives, as a first output signal, an output signal output from an output unit of a first rotation sensor, and receives, as a second output signal, an output signal output from an output unit of the second rotation sensor. The first output signal includes at least the first rotational information and the second rotational information based on the first rotation sensor, and the second output signal includes at least the first rotational information and the second rotational information based on the second rotation sensor. The controller determines whether there is a malfunction in each of the first and second rotation sensors as a function of the first output signal and the second output signal.

Rotation detecting apparatus

A sensor device includes a plurality of sensor elements and an output circuit in one sensor part, and a correction value calculator in an ECU, which obtains output signals from the sensor part and calculates an offset correction value based on a plurality of signal values that correspond to a detection value when a calculability condition is satisfied. The ECU also includes a control calculator that performs a calculation based on the corrected signal values that have been corrected by the offset correction value. Therefore, the offset correction value is calculated in view of an aging and an accuracy variation of the components used in the sensor device. In such manner, the detection value is appropriately corrected for the calculation.

Sensor device

If abnormalities of the sensor part are detected, the power-source control section temporarily stops the electric power supply from the sensor power source to the sensor part so that the sensor power source voltage Vs which is the voltage between the sensor power source and the sensor part falls. In addition, after electric power supply to the sensor part resumes, and the sensor part is recovered from the abnormalities, then, the power source control section continues the electric power supply from the sensor power source to the sensor part. When the sensor part is not recovered from the abnormalities, the power source control section stops the electric power supply from the sensor power source to the sensor part.

Growing community of inventors

Kariya, Japan

Toshimitsu Sakai