Patents Assigned to Denso Corporation
  • Publication number: 20240159835
    Abstract: A battery monitoring device is applied to an assembled battery having a plurality of battery cells connected in series, the battery cells including a first battery cell and a second battery cell. The battery monitoring device includes: an acquisition unit configured to acquire, during charging or discharging of the battery cells, a battery parameter of each of the first and second battery cells, the battery parameter of each of the first and second battery cells being a terminal voltage across the corresponding one of the first and second battery cells or an impedance of the corresponding one of the first and second battery cells; and a state calculation unit configured to calculate a difference between the acquired battery parameter of the first battery cell and the acquired battery parameter of the second battery cell, and calculate a battery state of the battery cells based on the calculated difference.
    Type: Application
    Filed: January 26, 2024
    Publication date: May 16, 2024
    Applicant: DENSO CORPORATION
    Inventors: Masaki UCHIYAMA, Shunichi Kubo, Taisuke Kurachi, Yuuki Hori
  • Publication number: 20240160378
    Abstract: An information processing device includes: a control section controlling rewriting of a recording device installed in a vehicle; and a setting section that, on the basis of a first maximum number of times of rewriting that corresponds to a first interval in which functions of the recording device are guaranteed, sets a second maximum number of times of rewriting in a second interval that is an interval that is shorter than the first interval.
    Type: Application
    Filed: November 3, 2023
    Publication date: May 16, 2024
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Jun IWAMOTO, Junichiro TAMAO, Norihide KOHMOTO, Toshiaki ISOGAI, Tomohiro TAKAHASHI
  • Publication number: 20240157810
    Abstract: A control apparatus includes: a control unit that controls torque of a rotating electric machine by performing switching control of an inverter; a temperature sensor that detects a temperature of a temperature detection target which is at least one of the machine and the inverter; and a current sensor that detects electric current flowing through the temperature detection target and has higher responsiveness than the temperature sensor. The control unit includes an overheat protection unit that limits the torque of the machine when the temperature detection target is in an overheated state. The overheat protection unit determines whether the temperature detection target is in the overheated state based on the temperature detected by the temperature sensor when an operating point of the machine is within a continuous operation region, and based on the electric current detected by the current sensor when the operating point is within a short-time operation region.
    Type: Application
    Filed: January 22, 2024
    Publication date: May 16, 2024
    Applicant: DENSO CORPORATION
    Inventors: Harumi HORIHATA, Shinichi OKADA
  • Publication number: 20240159510
    Abstract: A rotational angle measurement apparatus is applicable to a rotary electric machine that includes an outer rotor rotatable around a predetermined reference axis, and a stator disposed radially inside the outer rotor. The rotational angle measurement apparatus includes at least one measurement portion mounted to the outer rotor, and a measuring member located radially outside the stator to face the at least one measurement portion. The measuring member is configured to measure a position of the at least one measurement portion.
    Type: Application
    Filed: January 22, 2024
    Publication date: May 16, 2024
    Applicant: DENSO CORPORATION
    Inventors: Ryoya HASHIZUME, Harumi HORIHATA
  • Patent number: 11982539
    Abstract: A display system applied to a vehicle includes a navigation device guiding a route to a destination and a display control device displaying multiple route guidance contents in superimposed manner on a road surface using a head-up display. When the navigation device determines that a first route guidance and a second route guidance included in route guidance information are successive guidance, (i) the navigation device concurrently displays images of the first route guidance and the second route guidance, and (ii) the display control device activates display of a first guidance content that performs the first route guidance, and then activates display of a second guidance content that performs the second route guidance after deactivating the display of the first guidance content.
    Type: Grant
    Filed: July 13, 2021
    Date of Patent: May 14, 2024
    Assignee: DENSO CORPORATION
    Inventors: Satoshi Horihata, Kazuki Kojima, Akira Kamiya, Motohiro Fukumoto, Takeshi Hato
  • Patent number: 11982717
    Abstract: An actuator control device configured to control an operation of an actuator includes: a detection unit and a restriction unit. The detection unit is configured to monitor a battery voltage and to detect a descent time which is a drop time of the battery voltage from a preset first voltage to a second voltage lower than the first voltage. The restriction unit imposes, when the descent time is equal to or longer than a time threshold, a stronger restriction on an operation of the actuator than an occasion of when the descent time is less than the time threshold.
    Type: Grant
    Filed: June 15, 2022
    Date of Patent: May 14, 2024
    Assignee: DENSO CORPORATION
    Inventor: Sana Miyagawa
  • Patent number: 11984002
    Abstract: A control device comprising a processor, wherein the processor is configured to: acquire a warning level indicating a warning measure related to an abnormality that has occurred in a vehicle, from a device installed externally to the vehicle; detect an abnormality that has occurred in the vehicle, from equipment mounted to the vehicle; perform thinning control on a detection result of the abnormality detected according to the warning level; and transmit the detection result resulting from thinning to the device.
    Type: Grant
    Filed: August 29, 2022
    Date of Patent: May 14, 2024
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Takeshi Sugashima, Tokuya Inagaki
  • Patent number: 11985583
    Abstract: A communication control apparatus is configured to store communicability information, configured to control an update of the communicability information, configured to acquire a first route as a scheduled route along which the communication control apparatus moves, configured to control communication with the external device during moving of the communication control apparatus to control the update of the communicability information, based on the first route, the communicability information, and a communication detail requested by the communication control apparatus and the external device, configured to perform communication with the external device, configured to collect data required for the update of the communicability information through communication with the external device, and configured to control the update of the communicability information based on the collected data.
    Type: Grant
    Filed: October 1, 2021
    Date of Patent: May 14, 2024
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATION
    Inventors: Yuji Ninagawa, Satoshi Niwa
  • Patent number: 11984779
    Abstract: A rotating electric machine includes a field element having a plurality of magnetic poles of which polarities alternate in a circumferential direction, and an armature including an armature winding of multiple phases and an armature core having a circular cylindrical shape. The armature core is provided integrally with the armature winding. The field element and the armature are provided to oppose each other in a radial direction. An armature holding member includes a circular cylindrical portion assembled on an inner side in the radial direction of the armature core. The armature core and the circular cylindrical portion are fitted and fixed to each other with a predetermined tightening margin. A regulating portion regulates displacement in the circumferential direction of the armature core by engagement in the circumferential direction, and is provided in portions of the armature core and the circular cylindrical portion that oppose each other in the radial direction.
    Type: Grant
    Filed: January 18, 2022
    Date of Patent: May 14, 2024
    Assignee: DENSO CORPORATION
    Inventor: Yuuki Mawatari
  • Patent number: 11984778
    Abstract: A voltage limit ellipse is defined in a d-q coordinate system of a rotating electric machine by d-axis and q-axis currents flowing through an armature coil when the magnitude of a voltage vector applied to the armature coil is equal to a voltage limit value. The product of the number of electrical conductor sections per pole in each phase and the number of poles of the rotating electric machine is set to have, when the rotational speed of the rotating electric machine is equal to a maximum rotational speed, the center of the voltage limit ellipse located outside an electric-current limit circle and in a negative d-axis region in the d-q coordinate system and a positive-d-axis-side vertex of the voltage limit ellipse located inside or on the electric-current limit circle.
    Type: Grant
    Filed: June 25, 2021
    Date of Patent: May 14, 2024
    Assignee: DENSO CORPORATION
    Inventor: Yuki Takahashi
  • Patent number: 11983937
    Abstract: An intersecting road estimation device includes an object detection unit that detects an object existing around an own vehicle and a position of the object, an object extraction unit that extracts a stationary object and a position of the stationary object from an object detection result, a first estimation unit that estimates a road edge of a traveling road on which the own vehicle is traveling based on the position of the stationary object, a candidate extraction unit that extracts a stationary object existing outside the road edge of the traveling road estimated by the first estimation unit as a candidate for an outside stationary object representing a road edge of an intersecting road intersecting the traveling road, and a second estimation unit that estimates the road edge of the intersecting road based on a position of the outside stationary object extracted by the candidate extraction unit.
    Type: Grant
    Filed: January 8, 2021
    Date of Patent: May 14, 2024
    Assignee: DENSO CORPORATION
    Inventors: Yusuke Akamine, Katsuhiko Kondo, Yasuyuki Miyake
  • Patent number: 11984795
    Abstract: A rotating electrical machine includes a rotor and a magnet unit. The rotating electrical machine also includes a cylindrical stator and a housing. The stator is equipped with a stator winding made up of a plurality of phase windings. The stator is arranged coaxially with the rotor and faces the rotor. The housing has the rotor and the stator disposed therein. The rotor includes a cylindrical magnet retainer to which the magnet unit is secured and an intermediate portion which connects between a rotating shaft of the rotor and the magnet retainer and extends in a radial direction of the rotating shaft. A first region located radially inside an inner peripheral surface of a magnetic circuit component made up of the stator and the rotor is greater in volume than a second region between the inner peripheral surface of the magnetic circuit component and the housing in the radial direction.
    Type: Grant
    Filed: September 22, 2021
    Date of Patent: May 14, 2024
    Assignee: DENSO CORPORATION
    Inventors: Yuki Takahashi, Makoto Taniguchi
  • Patent number: 11984818
    Abstract: In an inverter, three switching circuits each include first to fourth switching elements, first and second diodes, and a control circuit controlling potentials of gates. The control circuit causes potentials of U-, V-, and W-phase output wirings to change among high, neutral point, and low potentials. The control circuit performs an emergency operation when any of the second and third switching elements and the first and second diodes has caused a short fault. In the emergency operation, a potential of a limit output wiring is caused to change between two potentials that are not inhibiting potentials, and potentials of normal output wirings are caused to change among three potentials. When the short-fault element is the second switching element or the second diode, an inhibiting potential is the low potential. When the short-fault element is the third switching element or the first diode, the inhibiting potential is the high potential.
    Type: Grant
    Filed: February 28, 2022
    Date of Patent: May 14, 2024
    Assignee: DENSO CORPORATION
    Inventor: Ken Toshiyuki
  • Patent number: 11984733
    Abstract: In a dynamic wireless power transfer system, a power transmission coil is provided in a road. A power transmission circuit supplies electric power to the power transmission coil. A power reception coil is provided in a vehicle. A power reception circuit is connected to the power reception coil. A relay circuit is provided in a tire of the vehicle. The relay circuit includes at least two relay coils that are connected in series. The relay circuit transfers electric power from the power transmission coil to the power reception coil by one relay coil of the two relay coils opposing the power transmission coil and the other relay coil opposing the power reception coil. A resonance frequency of the relay circuit is a frequency that is within a fixed range that is centered on an applied frequency of an alternating-current voltage that is applied to the power transmission coil.
    Type: Grant
    Filed: January 20, 2022
    Date of Patent: May 14, 2024
    Assignee: DENSO CORPORATION
    Inventors: Hayato Sumiya, Eisuke Takahashi, Nobuhisa Yamaguchi, Masaya Takahashi
  • Patent number: 11984735
    Abstract: A dynamic wireless power transfer system includes a power transmission coil, a power transmission circuit, a power reception coil, a power reception circuit, and a relay circuit. The power transmission coil is provided in a road. The power transmission circuit supplies electric power to the power transmission coil. The power reception coil is provided in a vehicle. The power reception circuit is connected to the power reception coil. The relay circuit transfers electric power between the power transmission coil and the power reception coil in a contactless manner.
    Type: Grant
    Filed: January 26, 2022
    Date of Patent: May 14, 2024
    Assignees: DENSO CORPORATION, THE UNIVERSITY OF TOKYO
    Inventors: Hayato Sumiya, Eisuke Takahashi, Nobuhisa Yamaguchi, Masaya Takahashi, Hiroshi Fujimoto, Osamu Shimizu
  • Publication number: 20240154195
    Abstract: In a battery monitoring system including a plurality of battery modules each including one or more cells, the battery modules are connected in series to each other. The battery monitoring system monitors the state of each cell based on the voltage value of the cell and the current value of the battery modules. A current detection unit detects the current value. Each voltage detection unit is associated with the corresponding one of the battery modules and detects the voltage value. Each slave unit is associated with the corresponding one of the battery modules, and wirelessly transmits information including synchronous current and voltage values detected by the current detection unit and the voltage detection unit. A master unit receives the information transmitted from the slave units. A central monitoring unit receives the information received by the master unit.
    Type: Application
    Filed: January 16, 2024
    Publication date: May 9, 2024
    Applicant: DENSO CORPORATION
    Inventors: Tatsuhiro Numata, Shunichi Kubo
  • Publication number: 20240154561
    Abstract: An inverter control device is for a vehicle including: a rotating electric machine that is an in-wheel motor integrated inside a drive wheel and includes a rotor including a magnet portion with a plurality of magnetic poles and a stator including multiphase stator windings without teeth protruding radially toward the rotor; and an inverter electrically connected to the rotating electric machine. The inverter control device includes: a control unit configured to perform PWM control to generate a drive signal for a switching element in the inverter based on a carrier signal and a command voltage in each phase in the overall operating region for an operating point defined by the rotation speed and the torque of the rotating electric machine; and an operation unit configured to operate the switching element based on the generated drive signal.
    Type: Application
    Filed: January 3, 2024
    Publication date: May 9, 2024
    Applicant: DENSO CORPORATION
    Inventors: Harumi HORIHATA, Yasuaki AOKI, Takahiro WATANABE
  • Publication number: 20240151781
    Abstract: A failure detecting apparatus detects a failure of a capacitor part provided on a communication path. The capacitor part is configured of a plurality of capacitors connected in series so as to cutoff DC current. Also, the failure detecting apparatus is provided with a signal input part that receives a predetermined detection signal from a transmission apparatus via the communication path and a detection part that detects a short-circuit failure of any of the capacitors that constitute the capacitor part based on the detection signal received by the signal input part.
    Type: Application
    Filed: January 12, 2024
    Publication date: May 9, 2024
    Applicant: DENSO CORPORATION
    Inventor: Tomomichi MIZOGUCHI
  • Patent number: 11975716
    Abstract: A device for setting a target vehicle that sets a target vehicle to be subjected to driving assistance control of a host vehicle includes: a detection signal acquisition device capable of acquiring a first detection signal representing an object by an image, and a second detection signal representing the object by a reflection point; and setting control unit, which determines whether to set a forward object as a target vehicle, wherein if a movement history is not associated with the forward object, and a combination history is associated with the forward object, then as a selection threshold of a first determination parameter for determining whether to set the forward object as the target vehicle, a selection threshold is used such that the forward object is less likely to be selected as the target vehicle than with the selection threshold which would be used if a movement history is associated with the forward object.
    Type: Grant
    Filed: December 23, 2021
    Date of Patent: May 7, 2024
    Assignees: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yohei Masui, Ryo Mizuno, Takashi Maeda, Naoki Kusumoto, Yuki Tezuka
  • Patent number: 11976618
    Abstract: A fixed core generates a magnetic attraction force with energization of a coil. A movable core has an attracted surface facing an attracting surface of the fixed core is attracted to the fixed core to cause the valve body to open a nozzle hole. A stopper member abuts against the movable core to restrict movement of the movable core. The movable core has an abutment portion that abuts against the stopper member, and a core body portion in which the attracted surface is formed. The attracting surface and the attracted surface extend annularly around an axis line of the fixed core, are formed so as to be separated from each other in an axis line direction in a state where the abutment portion abuts against the stopper member, and a separation distance from each other increases toward a radially outer side.
    Type: Grant
    Filed: July 6, 2021
    Date of Patent: May 7, 2024
    Assignee: DENSO CORPORATION
    Inventors: Shinsuke Yamamoto, Yuki Watanabe, Atsuya Okamoto