公开(公告)号：US20180118254A1

公开(公告)日：2018-05-03

申请号：US15788326

申请日：2017-10-19

Applicant: JTEKT CORPORATION ,  DENSO CORPORATION

Inventor： Takahiro TOKO ,  Hiromasa TAMAKI ,  Akira NAMBU ,  Takahiro KOJO ,  Nobuyori NAKAJIMA

IPC: B62D5/04

CPC classification number: B62D5/0463 ,  B62D5/0496

Abstract: A steering control device has a steering actuator as an operation target, the steering actuator includes a motor and a steering mechanism mechanically connected to a rotary shaft of the motor. The steering control device includes a controller configured to perform i) a low-temperature process of changing a torque of the motor when an estimated value estimated from a temperature of a lubrication target part of the steering mechanism is equal to or lower than a predetermined value with respect to when the estimated value is higher than the predetermined value and ii) an estimation process of calculating the estimated value which is set be lower than a detected value of a temperature sensor detecting a temperature of a predetermined member attached to the steering mechanism based on a heat emission parameter of the steering actuator associated with a current flow with the detected value as an input.

公开(公告)号：US20240132147A1

公开(公告)日：2024-04-25

申请号：US18485710

申请日：2023-10-11

Applicant: JTEKT CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA ,  DENSO CORPORATION

Inventor： Yuuta KAJISAWA ,  Yuji FUJITA ,  Yugo NAGASHIMA ,  Kazuma HASEGAWA ,  Takashi KOUDAI ,  Kaishi MONOBE ,  Kenichi ABE ,  Masaharu YAMASHITA ,  Shintaro TAKAYAMA ,  Kazuaki IIDA ,  Yasushi HORA ,  Yosuke YAMASHITA ,  Hiroki TOMIZAWA ,  Nobuyori NAKAJIMA ,  Hayaki TANABE ,  Toyohiro HAYASHI ,  Takeshi IWANA

IPC: B62D5/04 ,  H02P23/00

CPC classification number: B62D5/0484 ,  B62D5/046 ,  H02P23/00

Abstract: A vehicle power supply system includes a power source control device that executes a process of switching a connection state of a driving circuit to the main power source and an auxiliary power source including; a process of switching the connection state so as to transition to a backup state as a voltage decrease of the main power source occurs, and a process of switching the connection state so as to transition to a normal state as the voltage decrease of the main power source is resolved. After a voltage decrease of the main power source occurs, a turning-side control device of a steering control unit sets an output-limited state for a turning-side motor. The output-limited state is canceled upon the power source control device completing switching of the connection state so as to transition.

公开(公告)号：US20240025473A1

公开(公告)日：2024-01-25

申请号：US18222122

申请日：2023-07-14

Applicant: JTEKT CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA ,  DENSO CORPORATION

Inventor： Takashi KOUDAI ,  Yuji FUJITA ,  Yugo NAGASHIMA ,  Kazuma HASEGAWA ,  Yuuta KAJISAWA ,  Masaharu YAMASHITA ,  Atsushi SATOU ,  Yosuke YAMASHITA ,  Kazuaki IIDA ,  Shintaro TAKAYAMA ,  Takeshi IWANA ,  Toyohiro HAYASHI ,  Hayaki TANABE ,  Nobuyori NAKAJIMA ,  Hiroki TOMIZAWA

IPC: B62D5/04

CPC classification number: B62D5/0481

Abstract: A steering control system that controls a steering device of a vehicle includes a storage unit, and a control unit configured to make a state transition to a normal control state via a start-up state after a power source system of the vehicle is started. In the start-up state, the control unit executes a correction information storing process of acquiring correction element information using a state variable obtained from the steering device and writing correction information obtained based on the correction element information into the storage unit. In the start-up state, the control unit is configured to execute an abnormal condition determination process of determining whether an abnormal condition indicating that the correction information is abnormal is met. The correction information storing process is re-executed when the abnormal condition is met. The abnormal condition determination process is executed at least either before or after the correction information storing process.

公开(公告)号：US20230415758A1

公开(公告)日：2023-12-28

申请号：US18340330

申请日：2023-06-23

Applicant: JTEKT CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA ,  DENSO CORPORATION

Inventor： Yuuta KAJISAWA ,  Yuji FUJITA ,  Kazuma HASEGAWA ,  Yugo NAGASHIMA ,  Takashi KOUDAI ,  Daiki INABA ,  Masaharu YAMASHITA ,  Atsushi SATOU ,  Yosuke YAMASHITA ,  Kazuaki IIDA ,  Hiroyuki KATAYAMA ,  Shintaro TAKAYAMA ,  Toyohiro HAYASHI ,  Takeshi IWANA ,  Hayaki TANABE ,  Nobuyori NAKAJIMA ,  Hiroki TOMIZAWA

IPC: B60W50/023 ,  B60W50/02 ,  B60W50/14

CPC classification number: B60W50/023 ,  B60W50/0205 ,  B60W50/14

Abstract: An electric power source apparatus includes a drive control apparatus and an auxiliary control apparatus. The drive control apparatus and the auxiliary control apparatus are configured to communicate with each other. When one of the drive control apparatus and the auxiliary control apparatus is a first control apparatus and the other of the drive control apparatus and the auxiliary control apparatus is a second control apparatus, the first control apparatus is configured to continue a function to communicate with the second control apparatus even when the first control apparatus is not able to normally communicate with the second control apparatus, and configured to execute communication with the second control apparatus when the first control apparatus is put into a state where the first control apparatus is able to normally communicate with the second control apparatus.

公开(公告)号：US20230125769A1

公开(公告)日：2023-04-27

申请号：US17972017

申请日：2022-10-24

Applicant: JTEKT CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA ,  DENSO CORPORATION

Inventor： Kazuma HASEGAWA ,  Yuji FUJITA ,  Takashi KODERA ,  Isao NAMIKAWA ,  Atsushi ISHIHARA ,  Masaharu YAMASHITA ,  Kenji SHIBATA ,  Yuko GOTO ,  Hiroki TOMIZAWA ,  Nobuyori NAKAJIMA

IPC: B60W30/182 ,  B60W50/08 ,  B60W50/029 ,  B60W50/02 ,  B60W10/20

Abstract: A control device includes control circuits of a plurality of systems. When a transition condition is established, the control circuits of the systems make transition of a driving mode from a first driving mode to a second driving mode, and when a return condition is established in a state in which the driving mode has transitioned to the second driving mode, the control circuits of the systems make transition of the driving mode from the second driving mode to the first driving mode while gradually changing the current command values of the control circuits’ own systems toward the current command values before the adjustment.

公开(公告)号：US20230119506A1

公开(公告)日：2023-04-20

申请号：US17966043

申请日：2022-10-14

Applicant: JTEKT CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA ,  DENSO CORPORATION

Inventor： Kazuma HASEGAWA ,  Yuji FUJITA ,  Yugo NAGASHIMA ,  Masaharu YAMASHITA ,  Shintaro TAKAYAMA ,  Yosuke YAMASHITA ,  Hiroki TOMIZAWA ,  Nobuyori NAKAJIMA

IPC: B62D5/00 ,  B62D5/04

Abstract: A control device for a vehicle includes a plurality of control circuits configured to control a control object in cooperation or in combination by starting with powering-on of a vehicle as a trigger. Each of the plurality of control circuits is configured to perform a synchronization process and power latch control. Each of the plurality of control circuits is configured to maintain the operation mode immediately before the vehicle has been powered off in a period in which the power latch control is being performed. Each of the plurality of control circuits is configured not to perform the synchronization process in a predetermined period when the vehicle has been powered on.

公开(公告)号：US20230001983A1

公开(公告)日：2023-01-05

申请号：US17854834

申请日：2022-06-30

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  JTEKT Corporation ,  DENSO CORPORATION

Inventor： Masaharu YAMASHITA ,  Masataka OKUDA ,  Yosuke YAMASHITA ,  Yuji FUJITA ,  Yuuta KAJISAWA ,  Kenichi ABE ,  Nobuyori NAKAJIMA ,  Hiroki TOMIZAWA ,  Takeshi IWANA

IPC: B62D5/04 ,  B62D6/00

Abstract: A steer-by-wire steering system for a vehicle, including: an operating member operable by a driver; a dual-system steering device including two systems each of which includes an electric motor as a drive source, the steering device being configured to steer a wheel; and a controller configured to control a current to be supplied to each of the electric motors of the respective two systems so as to cause the steering device to steer the wheel in accordance with an operation of the operating member, wherein the controller is configured to prohibit the current greater than an upper limit value from being supplied to the electric motors of the respective two systems, and wherein, when the wheel is steered only by only one of the two systems, the controller raises the upper limit value of the current to be supplied to the electric motor of the one of the two systems.

公开(公告)号：US20190283800A1

公开(公告)日：2019-09-19

申请号：US16296851

申请日：2019-03-08

Applicant: DENSO CORPORATION

Inventor： Masaya TAKI ,  Koichi NAKAMURA ,  Toshimitsu SAKAI ,  Nobuyori NAKAJIMA

IPC: B62D6/10 ,  B62D5/04 ,  H02P4/00 ,  H02P5/60 ,  H02P5/685

Abstract: 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 μs, 400 μs) of different natural number multiples of a cycle period (for example, 200 μs) of the synchronization signal and need be synchronized. Each timing of the plurality of specific periodic processes is determined based on one synchronization signal.