Patents Assigned to HITACHI ASTEMO, LTD.
  • Publication number: 20240104204
    Abstract: Provided is an electronic control system including: a security event analysis unit configured to read a log recording an operation of a device and to detect a security event that is an event related to information security; a safety feature execution unit created to execute a safety feature serving as a measure against a safety event that is an event related to functional safety; a security feature execution unit capable of executing a security feature serving as a measure against the security event; a storage unit that stores correspondence information indicating at least one of the safety feature and the security feature corresponding to the security event; and a determination unit configured to identify, based on the correspondence information, a feature corresponding to the security event detected by the security event analysis unit and to cause at least one of the safety feature execution unit and the security feature execution unit to execute the identified feature, wherein the correspondence informatio
    Type: Application
    Filed: September 22, 2021
    Publication date: March 28, 2024
    Applicant: HITACHI ASTEMO, LTD.
    Inventors: Guillaume BORRITS, Kota IDEGUCHI
  • Patent number: 11942889
    Abstract: A first torque calculation unit 114 calculates torque TQ_DC currently generated by a motor 106 based on a DC current DC1. A second torque calculation unit 115 calculates torque TQ_UVW currently generated by the motor 106 based on U-phase, V-phase, and W-phase currents. A torque limit calculation unit 116 calculates a torque limit TQ_LMT1 using a torque limit characteristic map measured in advance based on a current limit DC_LMT1. A torque limit correction unit 117 compares first torque TQ_DC with second torque TQ_UVW to calculate a torque variation degree KP1. Then, the torque limit TQ_LMT1 is corrected using the variation degree KP1 to calculate a torque limit TQ_LMT2. As a result, even if required torque reaches the torque limit, the DC current does not exceed the current limit, and the output of the motor can be fully utilized by approaching the current limit.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: March 26, 2024
    Assignee: Hitachi Astemo, Ltd.
    Inventors: Shinyu Ko, Kohei Myoen, Eigo Kishimoto
  • Patent number: 11938858
    Abstract: A headlight control device which recognizes an oncoming vehicle using a camera without dazzling the driver of the oncoming vehicle includes a sequence control section that generates a headlight control signal from an image captured by the camera mounted on the vehicle, and a control value calculation section that calculates a control value for a light distribution pattern in the headlight control signal. An image recognition program includes a license plate recognition section that detects a license plate of the preceding vehicle from the image, and a cut-off line recognition section that detects a cut-off line of the headlight from the image. The control value calculation section calculates the control value for the light distribution pattern such that the cut-off line detected by the cut-off line recognition section is positioned higher by a predetermined height than an upper end of the license plate detected by the license plate recognition section.
    Type: Grant
    Filed: June 2, 2020
    Date of Patent: March 26, 2024
    Assignee: HITACHI ASTEMO, LTD.
    Inventor: Nobuya Orihara
  • Patent number: 11939013
    Abstract: An object of the present invention is to provide a steering control device capable of reducing a steering amount while securing operability of a driver according to a traveling condition. A steering control device 61 forming a steer-by-wire system, which has no physical connection between a steering shaft by a driver and an actual steered angle of a vehicle wheel, the steering control device including an actual steered angle calculation unit 74 that determines the actual steered angle based on a steering angle and a steering torque generated on the steering shaft.
    Type: Grant
    Filed: August 19, 2019
    Date of Patent: March 26, 2024
    Assignee: Hitachi Astemo, Ltd
    Inventors: Shinya Kasai, Kotaro Shiino, Junya Takahashi, Masaru Yamasaki
  • Patent number: 11939004
    Abstract: A steering device includes: a housing; and a spring configured to urge the retainer toward the rack bar in the second axis direction, and the rack bar, the retainer, the spring, and the spring holding member being disposed in this order in the second axis direction; the retainer chamfering portion provided on the retainer second end portion near the spring holding member, on a retainer second end portion outer circumference portion, and the retainer chamfering portion formed at a portion which is nearest the spring holding member abutment surface in the retainer second end portion outer circumference portion in a section that passes through the second axis, and that is perpendicular to the first axis, when the retainer main body portion is inclined with respect to the second axis.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: March 26, 2024
    Assignee: HITACHI ASTEMO, LTD.
    Inventors: Hirokazu Okamoto, Yoshiaki Kido
  • Patent number: 11941983
    Abstract: A driving assistance device includes a recording unit that records vehicle past traveling positions and related position estimation information, and a relative position estimation unit that estimates a vehicle relative position based on a sensor, adds a history of the relative position to the past traveling position, and uses the output of the sensor. The driving assistance device further includes a position estimation unit that estimates a vehicle position with respect to the past traveling positions and adds a history of the estimated position to the past traveling position, in addition to a deviation determination unit that determines deviation from the past traveling positions using a distribution of the past traveling positions, the vehicle position relative to the past traveling positions, and a reference value. The driving assistance device includes a control unit that controls the vehicle to cancel a warning or deviation when the deviation is determined.
    Type: Grant
    Filed: November 20, 2020
    Date of Patent: March 26, 2024
    Assignee: Hitachi Astemo, Ltd.
    Inventors: Hideyuki Kume, Hidehiro Toyoda
  • Patent number: 11940007
    Abstract: A tube is used in fiber-reinforced plastic power transmission shaft. The tube comprises: a cylindrical body section; a connection portion that has a larger diameter than the body section; and an inclined portion that has an outer diameter that increases toward the second connection section from the main body part. The inclined section has formed thereon, a weak section that is damaged when a load input in the axial direction exceeds a prescribed value. With this configuration, the cost of the tube can be reduced, and when a prescribed load is input to the tube in the axial direction, the tube is reliably damaged.
    Type: Grant
    Filed: March 8, 2021
    Date of Patent: March 26, 2024
    Assignee: HITACHI ASTEMO, LTD.
    Inventors: Kenichi Mori, Takahiro Nakayama, Kazuki Ohta
  • Patent number: 11942852
    Abstract: An object of the present invention is to obtain good electrical connection with respect to an insertion-side terminal having a large variation in a position. An energizing terminal assembly according to the present invention includes: a first energizing terminal 59 which constitutes an accommodation-side terminal of a press-fit type connector and has a sandwiching portion 59D; and a second energizing terminal which constitutes an insertion-side terminal of the press-fit type connector and is inserted into the sandwiching portion 59D to be sandwiched by the sandwiching portion 59D, wherein the sandwiching portion 59D has a groove-shaped portion 59E whose width dimension W and depth dimension D1 decrease from an inlet side of the second energizing terminal in an insertion direction toward a deep side of the second energizing terminal in the insertion direction.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: March 26, 2024
    Assignee: Hitachi Astemo, Ltd.
    Inventors: Haruaki Motoda, Kiyotaka Kanno
  • Publication number: 20240092287
    Abstract: The present disclosure provides a vehicle control device capable of detecting overheating of a CPU or a heat dissipation failure of the cooling mechanism, while suppressing increases in the size, the number of components, and the cost. A vehicle control device according to the present embodiment includes a memory, a CPU, a temperature sensor that is provided internal of the CPU, and a cooling mechanism that cools the CPU. The memory stores therein a standard pattern SP1, a wait time tw, a standard temperature Ts, and a normal temperature difference. The CPU then stores the load of the CPU in the memory, and monitors the load.
    Type: Application
    Filed: September 7, 2021
    Publication date: March 21, 2024
    Applicant: HITACHI ASTEMO, LTD.
    Inventors: Motomune SUZUKI, Hideyuki SAKAMOTO
  • Publication number: 20240092421
    Abstract: A steering device and a method for controlling the steering device according to the present invention are capable of suppressing, in a steer-by-wire steering device including a steering operation input member and a turning actuator that applies a turning force to a road wheel based on a driving signal, a change in which a yaw rate gain of a vehicle rises with respect to the operation speed of the steering operation input member by changing a turning angle command value to an angle less than the angle before the change when a turning frequency of the road wheel is a predetermined frequency. As a result, it becomes possible to suppress a case in which the yaw rate gain of the vehicle becomes too sensitive with respect to a steering operation by a driver.
    Type: Application
    Filed: December 28, 2021
    Publication date: March 21, 2024
    Applicants: HITACHI ASTEMO, LTD., National University Corporation Tokyo University of Agriculture and Technology
    Inventors: Hiroki SONODA, Yoshiji HASEGAWA, Tomoaki FUJlBAYASHI, Hiroshi MOURI
  • Publication number: 20240092352
    Abstract: To achieve both guarantee of safety related to vehicle control and improvement of availability in an in-vehicle device that cannot independently perform automatic driving and needs assistance of vehicle control. To achieve the above object, a control system includes an in-vehicle device and a coordination device that are synchronized in time point. The control system includes a travelable time calculation unit that calculates a travelable time for guaranteeing that a vehicle does not collide with an obstacle on a travel trajectory in a target region through which the vehicle equipped with the in-vehicle device passes, a travelability determination unit that determines validity of the travelable time, and a trajectory following unit that permits the in-vehicle device to follow the travel trajectory when it is determined that the travelable time is valid.
    Type: Application
    Filed: August 26, 2021
    Publication date: March 21, 2024
    Applicant: HITACHI ASTEMO, LTD.
    Inventors: Yuma KATO, Tasuku ISHIGOOKA, Yoshitaka ATARASHI, Hideki ENDO
  • Patent number: 11932224
    Abstract: An object of the present invention is to provide a brake control device and a brake system capable of braking with a shortened braking response when shifting from non-braking to braking. A brake control device 10 includes a command value calculation unit 4 that calculates an operation command value required to make a pressing force by which a brake pad 11a is pressed against a brake disc 11b reach a target thrust value. The command value calculation unit 4 includes: a clearance command calculation unit 43 that calculates a command value required for contact between the brake pad 11a and the brake disc 11b; and a thrust command calculation unit 40 that calculates a command value required for reaching the target thrust from a state where the brake pad 11a and the brake disc 11b are in contact with each other.
    Type: Grant
    Filed: August 15, 2019
    Date of Patent: March 19, 2024
    Assignee: Hitachi Astemo, Ltd.
    Inventors: Kyoshiro Itakura, Toshiyuki Ajima, Takahiro Ito, Kenichiro Matsubara, Daisuke Goto, Makoto Matsuura
  • Patent number: 11933642
    Abstract: A two-wire displacement sensor device includes an LC oscillation circuit including a coil whose inductance changes in accordance with a displacement amount of an object and an oscillation unit provided with capacitors and amplifying elements; and an interface unit serving as a signal output unit and a power supply input unit. The interface unit includes a constant current circuit that outputs at least two current values.
    Type: Grant
    Filed: December 22, 2021
    Date of Patent: March 19, 2024
    Assignee: Hitachi Astemo, Ltd.
    Inventor: Yosuke Murakami
  • Patent number: 11932324
    Abstract: An object of the present invention is to provide an electric power steering apparatus having a wiring structure effective for simplification. A power supply circuit board 23, a power conversion circuit board 24, and a control circuit board 25 are stacked and disposed in three stages in which the power supply circuit board 23 is disposed in a middle with a first flexible portion 34 and a second flexible portion 35 as a bend portion. A power supply circuit board connection terminal 42B and a control circuit board connection terminal 52B provided in a connector terminal assembly are electrically connected to a receiving terminal 42C of the power supply circuit board 23 and a receiving terminal 52C of the control circuit board 25, respectively, by being inserted and press-fitted thereinto.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: March 19, 2024
    Assignee: Hitachi Astemo, Ltd.
    Inventors: Kiyotaka Kanno, Haruaki Motoda
  • Patent number: 11936283
    Abstract: A gate driving power source device can be miniaturized by sharing power source units, and a large current can be prevented from locally flowing in a single chip even when a short-circuit failure occurs in a multi-phase conversion circuit included in a power conversion device. There is provided a shared power source unit supplying a shared DC power source to a gate drive circuit provided in any one of a plurality of lower arms of multi-phase conversion circuits or any one of a plurality of upper arms of the multi-phase conversion circuit and gate drive circuits provided in upper arms or lower arms of other conversion circuits.
    Type: Grant
    Filed: November 17, 2021
    Date of Patent: March 19, 2024
    Assignee: HITACHI ASTEMO, LTD.
    Inventors: Masatoshi Goto, Yuta Nakamura, Yoshinori Sagiya, Kazunari Kurokawa, Shugo Ueno, Shintaro Tai
  • Patent number: 11935338
    Abstract: Generally, the current threshold value is set as a fixed value. Therefore, even in a case where an abnormality occurs in the load and the resistance value is small, when the power supply voltage applied to the load is low, the current value is also low, and falls below the threshold value, and there is a possibility that the overcurrent is not detected. In the present invention, by providing a second detection means that detects a load abnormality by calculating the resistance value of the load from information of the power supply voltage applied to the load, in addition to a first detection means that detects an overcurrent state that indicates the load abnormality using only current value information, it is possible to detect an overcurrent indicating an abnormality of the load even when the power supply voltage applied to the load is low.
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: March 19, 2024
    Assignee: Hitachi Astemo, Ltd.
    Inventors: Hiroshi Kanno, Hiroshi Usami, Masataka Ota
  • Publication number: 20240085253
    Abstract: An object of the present invention is to provide a strain amount detection device capable of accurately detecting deformations, in multiple directions, of a tire by one strain measuring element. A strain amount detection device according to the present invention includes a disk-shaped base member that holds a strain measuring element, in which the base member acts as a strain body by transmitting strain of a tire to the strain measuring element.
    Type: Application
    Filed: August 31, 2021
    Publication date: March 14, 2024
    Applicant: Hitachi Astemo, Ltd.
    Inventors: Kenji YOSHIHARA, Hiroyuki ABE, Tsukasa TAKAHASHI, Takeo HOSOKAWA
  • Publication number: 20240086179
    Abstract: A software component update system is connected to a first database and a second database and includes a component tree rebuilding unit that rebuilds a software component tree of the second database on the basis of tag information and software component tree information of the first database; a component extraction unit that specifies the software components of the second database requiring update mirroring, on the basis of the rebuilt software component tree; and a file update unit that updates the software component file of the specified software components.
    Type: Application
    Filed: January 25, 2022
    Publication date: March 14, 2024
    Applicant: Hitachi Astemo, Ltd.
    Inventors: Miki YAMADA, Takafumi SUZUKI, Takashi MATSUBARA
  • Publication number: 20240083493
    Abstract: In a vehicular steering control device, a steer-by-wire system, and a method for controlling a steer-by-wire system according to the present invention, if an abnormality of a rotation angle sensor of a turning motor is detected, open-loop control is performed on the turning motor based on a rotation angle of a motor shaft before the abnormality of the rotation angle sensor is detected and information concerning a reaction generation device that applies reaction torque to steering wheel. Consequently, it is possible to continue control of a turning angle even if the rotation angle sensor of the turning motor fails, while suppressing an increase in system cost.
    Type: Application
    Filed: December 17, 2021
    Publication date: March 14, 2024
    Applicant: HITACHI ASTEMO, LTD.
    Inventor: Makoto KIMURA
  • Publication number: 20240085213
    Abstract: Provided is a map storage device that generates a map by automatically determining and storing a necessary map without a user's operation. The map storage device includes: a map creation unit that creates map data of a route traveled by a vehicle; a map data temporary storage unit that temporarily stores the map data; a map data storage unit that non-temporarily stores a part of the map data temporarily stored in the map data temporary storage unit; a behavior history information storage unit that stores behavior history information that is a behavior history of the vehicle; and a vehicle behavior determination unit that determines whether or not to store, in the map data storage unit, the map data temporarily stored in the map data temporary storage unit, based on the behavior history information.
    Type: Application
    Filed: September 22, 2021
    Publication date: March 14, 2024
    Applicant: HITACHI ASTEMO, LTD.
    Inventor: Yuichi KOMORIYA