Patents by Inventor Yoshiaki Nagasawa
Yoshiaki Nagasawa 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).
-
Publication number: 20220220908Abstract: Provided is an internal combustion engine control unit that controls an engine by detecting combustion characteristics with a simple configuration robust to disturbance such as noise. Therefore, the internal combustion engine control unit (ECU 12) of the present embodiment includes a rotational speed calculation unit 122a that calculates a crank rotational speed of an internal combustion engine (engine 1); an extreme value timing calculation unit 122b that calculates an extreme value timing of the crank rotational speed calculated by the rotational speed calculation unit 122a; and a combustion state estimation unit (combustion phase calculation unit 122c) that estimates a combustion state based on the extreme value timing of the crank speed calculated by the extreme value timing calculation unit 122b.Type: ApplicationFiled: March 27, 2020Publication date: July 14, 2022Inventors: Yoshihiro SUKEGAWA, Masayuki SARUWATARI, Shinya SATO, Yoshiaki NAGASAWA
-
Patent number: 11207968Abstract: In a constant-speed traveling mode or a follow-up traveling mode, reduction of fuel consumption and improvement of drivability are both achieved. An ECU 110 has an ISG connected to an engine and a battery connected to the ISG. The ECU 110 has an ISG control unit 606 that performs control for supplying power to the ISG from the battery to rotationally drive the ISG, or to drive the ISG to generate power for charging the battery. In one cycle of a traveling mode until completion of deceleration traveling after acceleration traveling is started so as to achieve a target vehicle speed, the ISG control unit 606 drives the ISG such that a remaining charge amount of the battery falls within a set range at completion of the deceleration traveling, and a traveling acceleration/deceleration falls within a predetermined requested acceleration/deceleration.Type: GrantFiled: January 29, 2018Date of Patent: December 28, 2021Assignee: HITACHI ASTEMO, LTD.Inventors: Kohei Suzuki, Toshio Hori, Yoshiaki Nagasawa
-
Patent number: 10989120Abstract: There is provided a vehicle-mounted control device that, when a restart request is generated during a time interval between the fulfillment of an engine automatic stop condition and complete stop, decreases a charging efficiency of an engine by means of at least one of a throttle valve and an intake valve to prevent an increase in the reverse rotational frequency of the engine, thereby ensuring the durability of the starting device of the engine, and preventing an accelerator response from deteriorating when a restart request based on the accelerator operation is generated.Type: GrantFiled: June 3, 2016Date of Patent: April 27, 2021Assignee: Hitachi Automotive Systems, Ltd.Inventors: Kohei Suzuki, Toshio Hori, Yoshiaki Nagasawa
-
Patent number: 10964974Abstract: A solid electrolyte is constituted by lithium phosphorus oxynitride (LiPON). A multiplication value obtained by multiplying a ratio of a peak intensity of nitrogen atoms having a single bond with one P atom and having a double bond with another P atom to a peak intensity of an N2 state in a Raman spectroscopy spectrum by a ratio of a content amount of N atoms to a content amount of P atoms is greater than or equal to 0.40.Type: GrantFiled: September 10, 2018Date of Patent: March 30, 2021Assignee: NGK Insulators, Ltd.Inventors: Miyuki Kojima, Yosuke Sato, Yuji Katsuda, Yoshiaki Nagasawa, Kazuyuki Kaigawa
-
Publication number: 20200300194Abstract: 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: ApplicationFiled: July 18, 2018Publication date: September 24, 2020Inventors: Yoshiaki NAGASAWA, Masayuki SARUWATARI, Koji ONISHI
-
Publication number: 20200086749Abstract: In a constant-speed traveling mode or a follow-up traveling mode, reduction of fuel consumption and improvement of drivability are both achieved. An ECU 110 has an ISG connected to an engine and a battery connected to the ISG. The ECU 110 has an ISG control unit 606 that performs control for supplying power to the ISG from the battery to rotationally drive the ISG, or to drive the ISG to generate power for charging the battery. In one cycle of a traveling mode until completion of deceleration traveling after acceleration traveling is started so as to achieve a target vehicle speed, the ISG control unit 606 drives the ISG such that a remaining charge amount of the battery falls within a set range at completion of the deceleration traveling, and a traveling acceleration/deceleration falls within a predetermined requested acceleration/deceleration.Type: ApplicationFiled: January 29, 2018Publication date: March 19, 2020Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Kohei SUZUKI, Toshio HORI, Yoshiaki NAGASAWA
-
Patent number: 10556591Abstract: While a vehicle is coasting with an engine being automatically stopped and a power transmission path between the engine and wheels being disengaged, when a deceleration request is made and the engine is restarted with the power transmission path being engaged, a deceleration level increases relative to the deceleration level required by a driver or the vehicle, thereby lowering drivability.Type: GrantFiled: January 13, 2017Date of Patent: February 11, 2020Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Kohei Suzuki, Toshio Hori, Yoshiaki Nagasawa, Naoyuki Tashiro
-
Patent number: 10227982Abstract: A scroll compression mechanism 11 for compressing refrigerant and a driving motor 13 that is connected to the scroll compression mechanism 11 through a driving shaft 15 and drives the scroll compression mechanism 11 are accommodated in a casing 3, the scroll compression mechanism 11 is supported in the casing 3 by a main frame 21, a stator 37 of the driving motor 13 is directly or indirectly supported in the casing 3, and the driving shaft 15 is connected to a rotor 39 of the driving motor 13 and supported in the casing 3 by a bearing plate 8, and a lower end of the driving shaft 15 is supported by a thrust plate 6 provided to the bearing plate 8, and the center position of the rotor 39 is located to be lower than the center position of the stator 37.Type: GrantFiled: December 20, 2011Date of Patent: March 12, 2019Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Satoshi Iitsuka, Tsutomu Kon, Akihiro Hayashi, Kenji Aida, Kazuyoshi Sugimoto, Yasunori Kiyokawa, Yoshihiko Nagase, Katsuki Akuzawa, Yoshiaki Nagasawa
-
Publication number: 20190039586Abstract: While a vehicle is coasting with an engine being automatically stopped and a power transmission path between the engine and wheels being disengaged, when a deceleration request is made and the engine is restarted with the power transmission path being engaged, a deceleration level increases relative to the deceleration level required by a driver or the vehicle, thereby lowering drivability.Type: ApplicationFiled: January 13, 2017Publication date: February 7, 2019Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Kohei SUZUKI, Toshio HORI, Yoshiaki NAGASAWA, Naoyuki TASHIRO
-
Publication number: 20190006710Abstract: A solid electrolyte is constituted by lithium phosphorus oxynitride (LiPON). A multiplication value obtained by multiplying a ratio of a peak intensity of nitrogen atoms having a single bond with one P atom and having a double bond with another P atom to a peak intensity of an N2 state in a Raman spectroscopy spectrum by a ratio of a content amount of N atoms to a content amount of P atoms is greater than or equal to 0.40.Type: ApplicationFiled: September 10, 2018Publication date: January 3, 2019Applicant: NGK INSULATORS, LTD.Inventors: Miyuki KOJIMA, Yosuke SATO, Yuji KATSUDA, Yoshiaki NAGASAWA, Kazuyuki KAIGAWA
-
Publication number: 20180355806Abstract: There is provided a vehicle-mounted control device that, when a restart request is generated during a time interval between the fulfillment of an engine automatic stop condition and complete stop, decreases a charging efficiency of an engine by means of at least one of a throttle valve and an intake valve to prevent an increase in the reverse rotational frequency of the engine, thereby ensuring the durability of the starting device of the engine, and preventing an accelerator response from deteriorating when a restart request based on the accelerator operation is generated.Type: ApplicationFiled: June 3, 2016Publication date: December 13, 2018Inventors: Kohei SUZUKI, Toshio HORI, Yoshiaki NAGASAWA
-
Patent number: 9856846Abstract: Provided is a system of carrying out engagement of a pinion and a ring gear at optimal timing and suppressing a bite-in sound, in a vehicle including an idle stop system. In a vehicle control device including an automatic stop unit which automatically stops an engine on the basis of an operating state of a vehicle; an automatic start unit which controls a starter during a period until the engine completely stops after the automatic stop unit executes the automatic stop of the engine, and restarts the engine; and an engine rotation detection unit which detects or operates a crank phase or a rotation number of the engine, the automatic start unit determines a control command of the starter at an interval shorter than an update interval of a signal of the engine rotation detection unit.Type: GrantFiled: February 7, 2014Date of Patent: January 2, 2018Assignee: Hitachi Automotive Systems, Ltd.Inventors: Koji Matsufuji, Toshio Hori, Koji Onishi, Yoshiaki Nagasawa, Shigenori Nakazato
-
Patent number: 9765745Abstract: The purpose of the present invention is to swiftly start up an engine in a range in which electrical equipment having electric power supplied thereto by a battery is not reset, even in cases when the battery is insufficiently charged and the battery is deteriorated. An engine start-up device according to the present invention starts up an engine by transmitting, to the engine, the rotary force of a direct-current motor driven by a battery.Type: GrantFiled: May 16, 2014Date of Patent: September 19, 2017Assignee: Hitachi Automotive Systems, Ltd.Inventors: Hiroyasu Kuniyoshi, Shigehiko Omata, Yoshiaki Nagasawa, Masanori Watanabe
-
Patent number: 9581160Abstract: A scroll compression mechanism 11 for compressing refrigerant and a driving motor 13 that drives the scroll compression mechanism 11 are accommodated in a casing 3, the scroll compression mechanism 11 is supported in the casing 3 by a main frame 21, the driving shaft 15 is connected to a rotor 39 of the driving motor 13 and supported in the casing 3 by a bearing plate 8, a pickup 45 is connected to an oil supply path 41 extending in an up-and-down direction in the driving shaft 15, and intercommunication paths 38B, 54A through which lubrication oil scraped up by the pickup 45 and supplied to respective lubrication sites is returned to the lower side of the driving motor 13 are provided between the stator 37 and the spacer ring 38 or between the spacer ring 38 and the casing 3.Type: GrantFiled: December 20, 2011Date of Patent: February 28, 2017Assignee: Panasonic Intellectual Property Management Co. Ltd.Inventors: Satoshi Iitsuka, Tsutomu Kon, Akihiro Hayashi, Katsuki Akuzawa, Kenji Aida, Kazuyoshi Sugimoto, Yasunori Kiyokawa, Yoshihiko Nagase, Yoshiaki Nagasawa
-
Patent number: 9494155Abstract: A scroll compression device that prevents scattering of lubrication oil to a discharge pipe side is provided. A cup 48 which is opened at the lower portion thereof and prevents scattering of lubrication oil is disposed on the lower surface of the main frame 21, and an annular insulator 19 having a double wall structure which surrounds windings is disposed on the upper surface of a stator 37. The peripheral wall of the cup 48 is hung between the double walls 19A, 19B of the insulator.Type: GrantFiled: December 20, 2011Date of Patent: November 15, 2016Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Satoshi Iitsuka, Tsutomu Kon, Akihiro Hayashi, Yasunori Kiyokawa, Kazuyoshi Sugimoto, Yoshihiko Nagase, Katsuki Akuzawa, Kenji Aida, Yoshiaki Nagasawa
-
Patent number: 9422904Abstract: Vehicle engine starting apparatus of automatically restarting an engine by quickly responding to a subsequent engine restart request even if engagement of a pinion gear with a ring gear is failed in the process of a stop of the engine. Pinion gear is displaced such that the pinion gear is engaged with the ring gear at a timing (when rotation speed of the pinion gear and rotation speed of the engine are nearly synchronized with each other with a signal from a control device when a predetermined condition is met. Where an engagement sensor has transmitted a signal “H” indicating engagement failure, when restart of the engine becomes necessary, the pinion gear is displaced toward a ring gear side by the control device.Type: GrantFiled: February 21, 2012Date of Patent: August 23, 2016Assignee: Hitachi Automotive Systems, Ltd.Inventors: Shigehiko Omata, Shigenori Nakazato, Norio Yanagawa, Shingo Kitajima, Atsushi Saeki, Yoshiaki Nagasawa
-
Publication number: 20160138549Abstract: The purpose of the present invention is to swiftly start up an engine in a range in which electrical equipment having electric power supplied thereto by a battery is not reset, even in cases when the battery is insufficiently charged and the battery is deteriorated. An engine start-up device according to the present invention starts up an engine by transmitting, to the engine, the rotary force of a direct-current motor driven by a battery.Type: ApplicationFiled: May 16, 2014Publication date: May 19, 2016Inventors: Hiroyasu KUNIYOSHI, Shigehiko OMATA, Yoshiaki NAGASAWA, Masanori WATANABE
-
Publication number: 20160053736Abstract: Provided is a system of carrying out engagement of a pinion and a ring gear at optimal timing and suppressing a bite-in sound, in a vehicle including an idle stop system. In a vehicle control device including an automatic stop unit which automatically stops an engine on the basis of an operating state of a vehicle; an automatic start unit which controls a starter during a period until the engine completely stops after the automatic stop unit executes the automatic stop of the engine, and restarts the engine; and an engine rotation detection unit which detects or operates a crank phase or a rotation number of the engine, the automatic start unit determines a control command of the starter at an interval shorter than an update interval of a signal of the engine rotation detection unit.Type: ApplicationFiled: February 7, 2014Publication date: February 25, 2016Inventors: Koji MATSUFUJI, Toshio HORI, Koji ONISHI, Yoshiaki NAGASAWA, Shigenori NAKAZATO
-
Publication number: 20140161649Abstract: There are provided a scroll compression device in which magnetization of a rotor and centering of a fixed scroll can be easily performed, and a method of assembling the scroll compression device.Type: ApplicationFiled: December 20, 2011Publication date: June 12, 2014Applicant: SANYO ELECTRIC CO., LTDInventors: Akihiro Hayashi, Satoshi Iitsuka, Kenji Aida, Tsutomu Kon, Yasunori Kiyokawa, Kazuyoshi Sugimoto, Yoshihiko Nagase, Katsuki Akuzawa, Yoshiaki Nagasawa
-
Patent number: 8688359Abstract: There is provided an idle stop system that can more quickly restart with small noise in conducting idle stop. In preparation for a restart request during an engine inertial rotation, after a motor is rotated in a state where a starter motor is not coupled to the engine, a pinion is engaged with a ring gear during the motor is subjected to inertial rotation like the engine. In this situation, the rotational speed including future pulsation of the engine is estimated with the use of information on the crank angle, and a pinion pushing timing is controlled so that the pinion and the ring gear contact each other with a given rotational speed difference taking a delay time of a pinion pushing unit into consideration.Type: GrantFiled: August 2, 2011Date of Patent: April 1, 2014Assignee: Hitachi Automotive Systems, Ltd.Inventors: Hiroyasu Kuniyoshi, Akira Nishioka, Ryuu Kai, Kenichi Machida, Yoshiaki Nagasawa