Patents by Inventor Masayuki Saruwatari

Masayuki Saruwatari has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11073092
    Abstract: Provided is a control device for an internal combustion engine capable of estimating a compression ratio of the internal combustion engine at the time of fuel cut of the internal combustion engine and without being affected by an intake air amount and an intake air temperature. A compression ratio ? is calculated on the basis of a change of in-cylinder pressure P with respect to crank angle ? at timing when an in-cylinder volume change rate dV/d?/V takes an extreme value or at timing from closing of an intake valve 109 to the start of ignition of the air-fuel mixture in the cylinder.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: July 27, 2021
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Toshihiro Aono, Masayuki Saruwatari
  • Patent number: 11059477
    Abstract: The purpose of the present invention is to provide a parking assist device for a vehicle such that the vehicle can be parked without decreasing or excessively increasing the speed or causing the vehicle to stop during assisted parking, the speed of the host vehicle is kept constant even immediately after an obstacle or a bump is cleared, and the vehicle is prevented from colliding with any other parked vehicle. The device calculates a speed command value and/or an engine torque command value in consideration of the acceleration/deceleration of the vehicle and controls the speed of the vehicle on the basis of the calculated speed command value and/or the engine torque command value, said acceleration/deceleration being predicted in advance on the basis of the height and distance of an obstacle and/or a bump that is present in a parking path, the gradient of the road surface, and the steering angle.
    Type: Grant
    Filed: July 11, 2016
    Date of Patent: July 13, 2021
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Yuuji Fukushima, Taisetsu Tanimichi, Masayuki Saruwatari
  • Patent number: 11007480
    Abstract: An object of the present invention is to provide an exhaust gas purification system which exhibits high exhaust gas purification performance. The present invention provides an exhaust gas purification system including: a carrier containing aluminum oxide; an exhaust gas purification device including a catalyst provided on the carrier and containing gallium, and connected to an internal combustion engine; and a system connected to the exhaust gas purification device for increasing an oxygen concentration. The system for increasing an oxygen concentration provides an oxygen concentration higher than that of a post combusted gas of the internal combustion engine.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: May 18, 2021
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Eri Takahashi, Masato Kaneeda, Kazuhiro Oryoji, Naoki Yoneya, Masayuki Saruwatari
  • Publication number: 20210140388
    Abstract: Combustion stability can be improved while HC and PN discharged from a combustion chamber are prevented. In an ECU that controls a fuel injection device installed in a combustion chamber of an internal-combustion engine so as to be able to inject fuel in a direction intersecting with a sliding direction of a piston, a pressure value of the fuel supplied to the fuel injection device is acquired, control is performed such that the fuel injection device injects the fuel at least twice in a compression stroke, and control is performed such that fuel injection timing of at least one time in the compression stroke is advanced earlier than fuel injection timing of a time corresponding to the high pressure value of the fuel when the acquired fuel pressure value is low.
    Type: Application
    Filed: May 11, 2018
    Publication date: May 13, 2021
    Inventors: Ryo KUSAKABE, Yoshihiro SUKEGAWA, Kenichiroh OGATA, Masayuki SARUWATARI
  • Publication number: 20210131372
    Abstract: An object of the present invention is to provide a control device of an injector capable of suppressing the influence of pressure reduction boiling even if pressure in a combustion chamber is low. In a case where the temperature of fuel injected from a fuel injection valve is within a set high temperature region and the pressure of the combustion chamber is within a set low pressure region, the control device of an in-cylinder direct injection-type injector according to the present invention controls to increase a lift amount of the injector as compared to the case of a low temperature region or a high pressure region.
    Type: Application
    Filed: February 5, 2018
    Publication date: May 6, 2021
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Tomoyuki HOSAKA, Taisuke SUGII, Eiji ISHII, Kazuki YOSHIMURA, Yoshihiro SUKEGAWA, Masayuki SARUWATARI
  • Publication number: 20210095608
    Abstract: Provided is a control device for an internal combustion engine, which can control an injection amount of water injected into each cylinder of the internal combustion engine to a minimum injection amount that allows knock to be suppressed for each cylinder. Therefore, in a control device 1 that controls water supply valves 35 (water supply devices) that supply water into each of combustion chambers of a plurality of cylinders R (cylinders R1 to R3 in the embodiment) of an internal combustion engine 100, the control device 1 includes a water supply amount calculation unit 2 that calculates a supply amount of water supplied to each of the combustion chambers of the plurality of cylinders R1 to R3 for each cylinder, and a water supply control unit 3 that controls the water supply valves 35 based on the supply amount of water calculated by the water supply amount calculation unit 2 for each cylinder.
    Type: Application
    Filed: April 22, 2019
    Publication date: April 1, 2021
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Yoshihiro SUKEGAWA, Atsushi SHIMADA, Masayuki SARUWATARI
  • Publication number: 20210079857
    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: Application
    Filed: February 5, 2019
    Publication date: March 18, 2021
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Toshihiro AONO, Masayuki SARUWATARI
  • Patent number: 10941726
    Abstract: Torque fluctuations caused by misfire and abnormal combustion are prevented appropriately at the time of switching from SI to HCCI, and exhaust of NOx is restricted at the time of switching. Provided is a control apparatus for an internal combustion engine performing a plurality of combustion modes each having a different air-fuel ratio and compression end temperature in a cylinder 7 from each other. In the middle of switching from a first combustion mode to a second combustion mode, an intermediate combustion mode in which the compression end temperature is increased while keeping a different air-fuel ratio from the air-fuel ratio of the first combustion mode and the air-fuel ratio of the second combustion mode is performed.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: March 9, 2021
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Shogo Namba, Masayuki Saruwatari, Kazuhiro Oryoji
  • Patent number: 10941724
    Abstract: An object of the present invention is to provide an engine system control device capable of stabilizing a combustion state, while improving fuel economy by performing intake air heating. According to the present invention, there is provided an engine system control device which controls an engine system including an engine configured to combust air-fuel mixture, an intake air path configured to take air to the engine, and an intake air heating mechanism configured to heat the intake air, wherein a heating amount of the intake air is controlled depending on a combustion speed of the air-fuel mixture.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: March 9, 2021
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Hisayuki Orita, Masayuki Saruwatari, Kazuhiro Oryoji, Motoyuki Abe
  • Patent number: 10890124
    Abstract: Provided is a technique capable of suppressing the amount of fuel adhering to a wall surface of a cylinder in an engine whose wall surface temperature varies every cycle. An internal combustion engine control device that controls an internal combustion engine, which injects fuel into a cylinder and generates combustion by ignition, includes: a wall surface temperature calculation unit that calculates a wall surface temperature of the cylinder based on a pressure in the cylinder; and a combustion control unit that controls the combustion of the internal combustion engine based on the calculated wall surface temperature.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: January 12, 2021
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Naoki Yoneya, Masayuki Saruwatari
  • Patent number: 10844826
    Abstract: An object of the present invention is to predict change of a combustion limit due to cycle variation of temperature and an EGR ratio and perform correction every cycle to decrease an amount of combustion consumption. Therefore, in an internal combustion engine control device that controls an internal combustion engine including a cylinder and an exhaust pipe, the internal combustion engine control device includes a control unit configured to perform EGR control of controlling an exhaust gas in the exhaust pipe to return to an inner cylinder of the cylinder, obtain temperature of the gas in the internal cylinder and an EGR ratio in a state where both an intake valve and an exhaust valve are closed in an combustion cycle, and correct a combustion parameter in a same combustion cycle as the combustion cycle on the basis of the obtained gas temperature and the obtained EGR ratio.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: November 24, 2020
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Naoki Yoneya, Masayuki Saruwatari, Kazuhiro Oryoji
  • Patent number: 10837418
    Abstract: The invention provides an internal combustion engine control device capable of performing a stable combustion at a lean combustion limit. In an internal combustion engine control device that controls an internal combustion engine provided with an ignition device igniting an air-fuel mixture formed inside a combustion chamber, an intake side air temperature of the internal combustion engine is controlled in response to a compression ratio of the combustion chamber.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: November 17, 2020
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Kazuhiro Oryoji, Masayuki Saruwatari, Yoshihiro Sukegawa
  • Patent number: 10808630
    Abstract: There is a problem of a difficulty in estimating the temporal change of the MBT for each of cylinders with light calculation load and high accuracy. An object of the present invention is to provide a control device capable of detecting a temporal change in the fuel efficiency optimum ignition timing (MBT) for each of cylinders. Therefore, the control device for internal combustion engine includes a control unit (CPU) that estimates an optimum ignition timing of each of cylinders from the relationship between the phase angle (?Tmax) at which the torque peaks and the phase angle (?Pmax) at which the in-cylinder pressure peaks with respect to the ignition timing of the cylinder.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: October 20, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Naoki Yoneya, Masayuki Saruwatari
  • Publication number: 20200300194
    Abstract: Misfire and torque fluctuation due to rapid combustion deterioration of an internal combustion engine can be reduced. An ECU of an engine which burns fuel in a cylinder includes a determination unit which determines a target air-fuel ratio of the engine on the basis of a variation in crank angle in a relatively small number of combustion cycles, or a difference in indicated average effective pressure from a previous combustion cycle, and an air-fuel ratio control unit which controls the air-fuel ratio of the engine to be the target air-fuel ratio determined by the determination unit. The determination unit shifts the target air-fuel ratio to a rich side when the variation exceeds a first setting value or when the difference exceeds a second setting value.
    Type: Application
    Filed: July 18, 2018
    Publication date: September 24, 2020
    Inventors: Yoshiaki NAGASAWA, Masayuki SARUWATARI, Koji ONISHI
  • Publication number: 20200300184
    Abstract: Provided is a control device for an internal combustion engine capable of estimating a compression ratio of the internal combustion engine at the time of fuel cut of the internal combustion engine and without being affected by an intake air amount and an intake air temperature. A compression ratio ? is calculated on the basis of a change of in-cylinder pressure P with respect to crank angle ? at timing when an in-cylinder volume change rate dV/d?/V takes an extreme value or at timing from closing of an intake valve 109 to the start of ignition of the air-fuel mixture in the cylinder.
    Type: Application
    Filed: January 31, 2018
    Publication date: September 24, 2020
    Inventors: Toshihiro AONO, Masayuki SARUWATARI
  • Publication number: 20200291914
    Abstract: Provided is a control device and a control method of a high-efficiency internal combustion engine capable of stabilizing combustion and suppressing NOx emissions without unnecessarily increasing a mounting load on an ECU. Therefore, the control device of the internal combustion engine for controlling the internal combustion engine includes an ignition plug that ignites an air-fuel mixture of fuel and air in the combustion chamber, a combustion pressure estimation sensor that detects a combustion pressure in the combustion chamber, and a crank angle sensor that detects a crank angle of a crankshaft. An MBT region is set based on an ignition delay period from an ignition timing of the ignition plug calculated from a detection value of the combustion pressure estimation sensor and a detection value of the crank angle sensor to a combustion start timing in the combustion chamber, and a combustion period from the combustion start timing to a set amount combustion end timing when a set amount of combustion ends.
    Type: Application
    Filed: December 11, 2018
    Publication date: September 17, 2020
    Inventors: Atsushi SHIMADA, Toshihiro AONO, Masayuki SARUWATARI
  • Patent number: 10731594
    Abstract: Provided is a control device of a fuel injection device which can stabilize a behavior of a valve even when a voltage of a voltage source varies, and can reduce a deviation of an injection amount. The fuel injection device includes a valve and a coil which generates a magnetic attraction force to attract a movable element which drives the valve. A control device applies a predetermined voltage to the coil on the basis of an injection pulse, causes a drive current to flow to the coil until the drive current reaches a maximum current, drives the valve by attracting the movable element, and injects fuel. The drive current flowing to the coil is lowered from the maximum current before the valve reaches a desired maximum lift position, and a constant voltage lower than a predetermined voltage or 0 V is continuously applied to the coil until the valve reaches the desired maximum lift position.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: August 4, 2020
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Ryo Kusakabe, Masayuki Saruwatari, Noriyuki Maekawa
  • Publication number: 20200240340
    Abstract: An object of the present invention is to provide an engine system control device capable of stabilizing a combustion state, while improving fuel economy by performing intake air heating. According to the present invention, there is provided an engine system control device which controls an engine system including an engine configured to combust air-fuel mixture, an intake air path configured to take air to the engine, and an intake air heating mechanism configured to heat the intake air, wherein a heating amount of the intake air is controlled depending on a combustion speed of the air-fuel mixture.
    Type: Application
    Filed: August 8, 2016
    Publication date: July 30, 2020
    Inventors: Hisayuki ORITA, Masayuki SARUWATARI, Kazuhiro ORYOJI, Motoyuki ABE
  • Patent number: 10696302
    Abstract: An internal combustion engine control device is provided. The internal combustion engine control device is provided with a generator that is driven by exhaust gas of the internal combustion engine. The internal combustion engine control device is capable of increasing the power generation of the generator. The internal combustion engine control device includes an exhaust amount control unit. The exhaust amount control unit increases the amount of the exhaust gas supplied to the generator in a coasting state.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: June 30, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yuuki Okuda, Kazuhiro Oryoji, Masayuki Saruwatari
  • Patent number: 10677208
    Abstract: Provided is a fuel injector that is capable of reducing penetration. The fuel injector of the present invention includes a valve body having a valve body side seat surface, a valve seat side seat surface that abuts on the valve body side seat surface, and an injection hole that is provided downstream of a position at which the valve body side seat surface abuts on the valve seat side seat surface. The valve body has a projection that is formed from the valve body side seat surface toward the injection hole, and the projection is formed to be smaller in a direction of fuel flow between seats than a radius of an upstream opening surface of the injection hole.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: June 9, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Tomoyuki Hosaka, Eiji Ishii, Yoshihiro Sukegawa, Taisuke Sugii, Kazuki Yoshimura, Kazuhiro Oryoji, Masayuki Saruwatari