Patents Assigned to Hitachi Automotive Systems, Ltd.
  • Patent number: 11391226
    Abstract: To accurately evaluate combustion stability in consideration of the effect of the trend even at the time of the transient operation. The present invention is configured to have a combustion energy calculation unit that calculates a combustion energy W_t of one combustion cycle in an internal combustion engine, a trend calculation unit that calculates a trend Tr of change in the combustion energy W_t calculated by the combustion energy calculation unit in a plurality of the combustion cycles, and a combustion stability judgment unit that judges combustion stability based on the combustion energy W_t in the plurality of combustion cycles and the trend Tr of change calculated by the trend calculation unit.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: July 19, 2022
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Toshihiro Aono, Masayuki Saruwatari
  • Patent number: 11371415
    Abstract: Provided is a flow control valve and a cooling system, with which a pressure loss can be reduced. A rotor 12 includes a first guide portion 43 on the outer circumferential side of an extending portion 42 fixed to a drive shaft 13 and protruding into a space inside the rotor 12. The first guide portion 43 has a radial outer shape which increases from an x-axis positive direction side toward an x-axis negative direction side.
    Type: Grant
    Filed: March 5, 2021
    Date of Patent: June 28, 2022
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Takeshi Yoshimura, Shingo Murakami, Zhenyu Shen
  • Patent number: 11302854
    Abstract: The purpose of the present invention is to provide a highly accurate and highly reliable physical quantity sensor wherein an error due to stress applied to a sensor element of the physical quantity sensor is reduced. This physical quantity sensor device is provided with: a hollow section formed in a Si substrate; an insulating film covering the hollow section; and a heating section formed in the insulating film. The sensor device is also provided with a detection element that detects the temperature of the insulating film above the hollow section, the detection element is provided with a first silicon element and a second silicon element, and the first silicon element and the second silicon element are doped with different impurities, respectively.
    Type: Grant
    Filed: July 1, 2015
    Date of Patent: April 12, 2022
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Hiroshi Nakano, Masahiro Matsumoto, Yoshimitsu Yanagawa, Yasuo Onose
  • Patent number: 11296613
    Abstract: The inductance of a noise filter circuit is reduced, and an output is increased, whereby positive and negative electrode power supply side conductors each include a first and second conductor portions having a side surface and a main surface having an area larger than an area of the side surface. The first conductor portions are arranged on one surface of a base portion with an insulating member interposed therebetween. The second conductor portions penetrate through a core member in a state in which the main surfaces face each other. A width of a portion of the first conductor portion which is in contact with the insulating member in a direction perpendicular to current flow direction is larger than a width of a portion of the second conductor portion which is disposed within the core member in the direction perpendicular to current flow direction.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: April 5, 2022
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Youhei Nishizawa, Fusanori Nishikimi, Yusaku Katsube
  • Patent number: 11275875
    Abstract: Example implementations described herein are directed to systems and methods that include the storage of I/F communication activity during a co-execution and a repeater to reproduce such I/F communication activity. Thus in a subsequent re-execution of the simulation or applications, one or more of the simulations or applications utilized can be replaced with a repeater without requiring the full execution of the simulation or application, thereby saving license usage as well as requiring fewer hardware resources for execution.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: March 15, 2022
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Ichiki Homma, Heming Chen, Yuan Xiao, Sujit S. Phatak
  • Patent number: 11268920
    Abstract: To obtain a physical quantity detection device that can prevent a thermal influence on a sensor due to downsizing. A physical quantity detection device 20 of the present invention includes a measuring unit 213 protruding from an inner wall of a main passage 22 toward a passage center of the main passage. The physical quantity detection device 20 includes at least one of a flow sensor 205 that detects a flow rate of a measured gas 2, an intake air temperature sensor 203 that detects temperature, a pressure sensor 204 that detects pressure, and a humidity sensor 206 that detects humidity, and the sensors are disposed along a protruding direction of the measuring unit 213.
    Type: Grant
    Filed: July 30, 2018
    Date of Patent: March 8, 2022
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Takahiro Miki, Akira Uenodan, Takayuki Yogo, Binti Haridan Fatin Farhanah, Shinobu Tashiro, Tsutomu Kono
  • Patent number: 11262266
    Abstract: A pressure sensor which detects a combustion pressure of an engine includes: a contact part which is in direct or indirect contact with a casing of the engine when the pressure sensor is attached to the engine; and a pressure detection unit which detects the combustion pressure and outputs a signal corresponding to the combustion pressure, wherein the pressure detection unit includes a pressure detection element which detects the combustion pressure and outputs a signal, and a circuit unit which converts the signal obtained from the pressure detection element into a signal corresponding to the combustion pressure, and the pressure detection unit is provided at a location positioned more inside the engine than the contact part when the pressure sensor is attached to the engine.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: March 1, 2022
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Tomonari Misawa, Daisuke Terada, Hiroshi Onuki
  • Patent number: 11249139
    Abstract: When a battery voltage of a battery cell is high, it takes time for a detected voltage to drop to a fixed threshold. Therefore, an ON control of a switch element takes long time to detect a disconnection state reliably. A battery monitoring system includes: a monitoring circuit corresponding to an assembled battery having a plurality of battery cells and which monitors states of the battery cells; voltage detection lines which are provided corresponding to the battery cells and which connect the battery cells with the monitoring circuit; and switch elements which are provided between the voltage detection lines and which adjust voltages of the battery cells, the battery monitoring system compares battery voltages of the adjacent battery cells with a varying threshold determined based on a voltage just before checking a disconnection state and detects disconnection states of the voltage detection lines according to the comparison result.
    Type: Grant
    Filed: May 8, 2018
    Date of Patent: February 15, 2022
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Takuya Enmei, Akihiro Machida, Tatsumi Yamauchi
  • Patent number: 11235760
    Abstract: The purpose of the present invention is to provide a system in which the reliability of an automatic driving system can be excellently complemented by a different control system while the automatic driving system is effectively used. The vehicle control device outputs to a drive device one of a first control signal generated on the basis of automatic driving control information, and a second control signal generated on the basis of the relative information between a vehicle and a surrounding object. If an abnormality is detected in the automatic driving control information, the second control signal is output to the drive device in place of the first control signal.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: February 1, 2022
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Satoshi Otsuka, Kohei Sakurai
  • Patent number: 11236697
    Abstract: The present invention provides a high-efficiency and highly-reliable fuel injection control device that controls a fuel injection valve of an internal combustion engine and can perform injection amount control in accordance with a deterioration degree of the fuel injection valve. A fuel injection control device controlling a fuel injection valve of an internal combustion engine includes a deterioration determination unit that determines a deterioration state of the fuel injection valve, an injection amount learning unit that learns the injection amount of the fuel injection valve, and a learning frequency change unit that changes the learning frequency of the injection amount learning unit in accordance with the deterioration state of the fuel injection valve.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: February 1, 2022
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Fumihiro Itaba, Osamu Mukaihara, Akira Iizuka
  • Patent number: 11235780
    Abstract: A transient increase/decrease of power supplied to a reconfiguration circuit to be a logic circuit whose circuit configuration can be changed is reduced. An autonomous traveling control ECU has a reconfiguration circuit, a function control unit, a power supply circuit, and a power supply control unit. The reconfiguration circuit is a reconfigurable logic circuit. The function control unit determines an operation mode of the reconfiguration circuit on the basis of a mode determination signal and controls a reconfiguration of the reconfiguration circuit on the basis of a determination result. The power supply circuit supplies power to the reconfiguration circuit. The power supply control unit controls the power supply circuit. The power supply control unit 206 controls a load current generated by the power supply circuit before a load variation of the reconfiguration circuit, on the basis of power supply control information to be information for controlling the power supply circuit.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: February 1, 2022
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Hiroshi Shinoda, Ming Liu, Taisuke Ueta, Hideyuki Sakamoto
  • Patent number: 11239735
    Abstract: A motor unit includes: a first rotating electric machine which includes a cylindrical first stator, a first rotor disposed coaxially with the first stator, a first shaft disposed coaxially with the first rotor, and a cylindrical first casing accommodating the first stator and the first rotor; a second rotating electric machine which includes a cylindrical second stator, a second rotor disposed coaxially with the second stator, a second shaft disposed coaxially with the second rotor, and a cylindrical second casing accommodating the second stator and the second rotor; a single drive device which is integrally fixed across a peripheral surface in a diameter direction of the first rotor in the first casing and a peripheral surface in a diameter direction of the second rotor in the second casing; and a surface-matching fixing portion which is fixed by a fixing member while an axial end surface of the first casing comes into contact with an axial end surface of the second casing.
    Type: Grant
    Filed: March 10, 2020
    Date of Patent: February 1, 2022
    Assignees: HONDA MOTOR CO., LTD., Hitachi Automotive Systems, Ltd.
    Inventors: Manabu Yazaki, Tomoyuki Suzuki, Sachio Kawada, Yasuyuki Saito, Hiroshi Hamano, Tsuyoshi Harada
  • Patent number: 11231871
    Abstract: The present invention detects a battery abnormality during a driving cycle or self-shutdown even when a battery voltage sensor is not mounted. In the present invention, a first storage region is provided with a failure information storage region and a second storage region management information storage region, a second storage region is provided with a failure information storage region and a first storage region management information storage region, and a management information access flag storage region for storing access information indicating a presence or absence of an access to management information of the first storage region and management information of the second storage region is provided separately from the first storage region and the second storage region.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: January 25, 2022
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventor: Kenji Masuda
  • Publication number: 20220001845
    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: Application
    Filed: August 15, 2019
    Publication date: January 6, 2022
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Kyoshiro ITAKURA, Toshiyuki AJIMA, Takahiro ITO, Kenichiro MATSUBARA, Daisuke GOTO, Makoto MATSUURA
  • Patent number: 11215154
    Abstract: The damper mechanism used for a high-pressure fuel supply pump is configured so that an outer circumferential surface of a cover in regard to the thickness direction of the base material of the cover engages with the inner circumference of an open end part of a bottomed tubular concave part formed in a damper housing or in a pump housing of the high-pressure fuel supply pump. The total height of the damper as a low-pressure pulsation reducing mechanism can be reduced, and the dimensions of the damper in the radial directions can also be reduced. In cases where the damper mechanism is formed integrally with the high-pressure fuel supply pump, the total height of the high-pressure fuel supply pump can be reduced and the dimensions of the damper part in the radial directions can also be reduced.
    Type: Grant
    Filed: August 19, 2019
    Date of Patent: January 4, 2022
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventor: Atsuji Saito
  • Publication number: 20210409012
    Abstract: A sensor output circuit is limited with high accuracy, and reduces radio wave radiation by signal transmission using a single-line signal. The sensor output includes a pulse signal Vin that changes according to a physical quantity to be measured, MOS transistors that perform on/off operations according to the pulse signal Vin, a constant current source that generates a constant current, a MOS transistor which generates a gate voltage of a MOS transistor, MOS transistors which form a current mirror circuit, and the MOS transistor which works to maintain a drain voltage of the MOS transistor at a constant voltage, and the output terminal which is driven by the MOS transistors connected in series. In addition, an output signal from the sensor output circuit is transmitted to a control circuit via an output signal line. The control circuit includes a pull-up resistor, a capacitor, and an input gate circuit.
    Type: Application
    Filed: November 8, 2018
    Publication date: December 30, 2021
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Masahiro MATSUMOTO, Hiroshi NAKANO, Akira KOTABE
  • Publication number: 20210396165
    Abstract: A balancer apparatus equipped with an oil pump includes a pump housing including a pump containing chamber provided therein, a pump forming member contained in the pump containing chamber and configured to discharge oil introduced from an intake portion from a discharge portion to an oil passage of the internal combustion engine when a rotational force is transmitted thereto, a control oil chamber provided between the pump containing chamber and the pump forming member in a radial direction with respect to a rotational axis of the pump forming member and configured to change a hydraulic pressure of the oil to be discharged from the pump forming member with the aid of the oil introduced therein after being discharged from the discharge portion, passing through an oil passage of the internal combustion engine, and being subjected to a pressure adjustment, and a balancer housing including a bearing retainer portion configured to transmit the rotational force from the internal combustion engine to the pump formin
    Type: Application
    Filed: February 21, 2020
    Publication date: December 23, 2021
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Masahumi KURITA, Takashi HIRANO, Masaharu KITAMURA
  • Patent number: 11199608
    Abstract: The present invention is an antenna provided with: a plurality of radiating parts formed on a base plate; a waveguide tube inside of which radio waves emitted from the radiating parts propagate; a lens having a plurality of curved surfaces having a substantially hyperbolic shape and disposed in an opening of the waveguide tube; and a protruding part formed in a tapered shape between the plurality of radiating parts. The tip of the protruding part is formed at a position lower than an opening surface.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: December 14, 2021
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Hideyuki Nagaishi, Akira Kuriyama, Akira Kitayama, Hiroshi Kuroda
  • Patent number: 11201614
    Abstract: Disconnection of a circulation path through which a circulation current flows is detected while suppressing an increase in circuit scale. A battery monitoring device includes switching circuits that control currents flowing through coils of main contactors by being controlled to be turned on and off, freewheeling diodes that are connected to the coils of the main contactors to form circulation paths for circulating the currents, and a control unit. The control unit measures output voltages of the freewheeling diodes at an input terminal, and detects the disconnection of the circulation paths based on the output voltages of the freewheeling diodes.
    Type: Grant
    Filed: June 13, 2018
    Date of Patent: December 14, 2021
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Hikaru Miura, Akihiro Machida, Mutsumi Kikuchi, Tatsumi Yamauchi
  • Patent number: 11198352
    Abstract: A relay (25) connects and disconnects an electrical circuit to which an inverter (16) and an electricity storage device (19) are connected. A BCU (22) controls the electricity storage device (19). An HC (27) controls an electric motor (15), the inverter (16) and the BCU (22). The HC (27) and the BCU (22) respectively have FET switches (30, 31) for controlling supply and stop of the excitation current in the relay (25). When the electricity storage device (19) is determined to be in an abnormal state, the BCU (22) transmits an abnormal signal to the HC (27), and when a predetermined time has elapsed, turns off (opens) the first FET switch (30) of the BCU (22). The HC (27) executes stop processing based upon the abnormal signal received from the BCU (22) and then turns off (opens) the second FET switch (31) of the HC (27).
    Type: Grant
    Filed: April 12, 2018
    Date of Patent: December 14, 2021
    Assignees: Hitachi Construction Machinery Co., Ltd., Hitachi Automotive Systems, Ltd.
    Inventors: Itaru Naya, Seiji Ishida, Ken Takeuchi, Mutsumi Kikuchi