Patents by Inventor Gaku Sato
Gaku Sato 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).
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Patent number: 11054195Abstract: A heat exchanger includes a tube expansion portion provided on a heat transfer tube such that an outer peripheral surface of the heat transfer tube is pressed against an inner peripheral surface of a first hole provided in a side wall portion of a case, and a first concave surface portion that is provided in a part of an outer surface of the tube expansion portion and forms a first gap, into which brazing material of a first brazed portion advances, between the outer surface of the tube expansion portion and the inner peripheral surface of the first hole. Thus, the attachment strength of the heat transfer tube can be improved by means of a simple configuration.Type: GrantFiled: September 23, 2019Date of Patent: July 6, 2021Assignee: NORITZ CORPORATIONInventors: Yoshinori Hokada, Gaku Sato, Hideyuki Fujisawa, Yukiko Kashima
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Publication number: 20200103182Abstract: A heat exchanger includes a tube expansion portion provided on a heat transfer tube such that an outer peripheral surface of the heat transfer tube is pressed against an inner peripheral surface of a first hole provided in a side wall portion of a case, and a first concave surface portion that is provided in a part of an outer surface of the tube expansion portion and forms a first gap, into which brazing material of a first brazed portion advances, between the outer surface of the tube expansion portion and the inner peripheral surface of the first hole. Thus, the attachment strength of the heat transfer tube can be improved by means of a simple configuration.Type: ApplicationFiled: September 23, 2019Publication date: April 2, 2020Applicant: NORITZ CORPORATIONInventors: Yoshinori HOKADA, Gaku SATO, Hideyuki FUJISAWA, Yukiko KASHIMA
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Patent number: 10197029Abstract: A drive current applied to a coil is reduced from a time at which a first collision signal indicating collision of a movable core with a valve element is input to a time at which a second collision signal indicating collision of the movable core with a stationary core is input.Type: GrantFiled: April 18, 2016Date of Patent: February 5, 2019Assignee: KEIHIN CORPORATIONInventors: Takayuki Shimatsu, Masamitsu Mori, Masateru Moriya, Gaku Sato, Ikuhiro Uemura
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Patent number: 10012194Abstract: In the interior of a resin mold portion that constitutes a fuel injection valve, an amplifying member to which a power source terminal and a signal terminal are connected, is provided. A signal transmitting unit, which outputs a detection signal from a sensor, is connected electrically to a substrate of the amplifying member. Further, the amplifying member is molded integrally when the resin mold portion is formed. In addition, a pressure inside a combustion chamber of an internal combustion engine, which is detected by the sensor, is output through the signal transmitting unit to the amplifying member, is amplified by the amplifying member, and is output externally from the signal terminal.Type: GrantFiled: December 16, 2015Date of Patent: July 3, 2018Assignee: KEIHIN CORPORATIONInventors: Gaku Sato, Keisuke Machida, Kenichi Yoshimura, Koji Suzuki
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Patent number: 9964063Abstract: Within a resin mold portion of a fuel injection valve, an amplifying member having a substrate is provided. An engagement hole that penetrates in an axial direction is formed in another end part of the amplifying member, and an engagement pin, which is formed on a bobbin of a housing, is inserted through the engagement hole. A second connector of a second signal transmitting member, which constitutes part of a signal transmitting unit, is inserted from below into a connecting hole formed in the substrate. In addition, when the resin mold portion is molded, the amplifying member is retained in a state with the engagement pin and the second connector being inserted, respectively, into the engagement hole and the connecting hole.Type: GrantFiled: December 16, 2015Date of Patent: May 8, 2018Assignee: KEIHIN CORPORATIONInventors: Gaku Sato, Kenichi Yoshimura, Keisuke Machida, Koji Suzuki
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Patent number: 9822746Abstract: A fuel injection control apparatus is provided with a first valve opening timing determination portion that determines a first valve opening timing on the basis of a collision signal that is included in detected signals of an in-cylinder pressure sensor and indicates a collision between a movable core and a valve element and a second valve opening timing determination portion that determines a second valve opening timing on the basis of another collision signal that is included in the detected signals and indicates a collision between the movable core and a stationary core.Type: GrantFiled: April 18, 2016Date of Patent: November 21, 2017Assignee: KEIHIN CORPORATIONInventors: Takayuki Shimatsu, Masamitsu Mori, Masateru Moriya, Gaku Sato, Ikuhiro Uemura
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Patent number: 9689362Abstract: A fuel injection valve equipped with an in-cylinder pressure sensor is provided, in which the fuel injection valve is fitted into an injection valve mounting hole provided in an engine, the in-cylinder pressure sensor is attached to a valve housing part of the fuel injection valve, the in-cylinder pressure sensor having a front end facing the combustion chamber and detecting a pressure of the combustion chamber, and a signal transmission device is connected to the in-cylinder pressure sensor, the signal transmission device transmitting an output signal thereof to an outside. The signal transmission device is disposed on the valve housing part and covered together with a part of the valve housing part by an insulating layer. In such arrangement, the signal transmission device is protected by the insulating layer, and a contact between the signal transmission device and an inner face of the injection valve mounting hole is prevented.Type: GrantFiled: October 12, 2016Date of Patent: June 27, 2017Assignee: Keihin CorporationInventors: Gaku Sato, Yuki Kojima, Nakaya Nakamura
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Patent number: 9587612Abstract: An in-cylinder pressure detecting device of a direct injection type internal combustion engine is provided in which a ring-shaped pressure detection element (34) surrounding a fuel injection hole (33b) is provided in the vicinity of an extremity of an injector (20) that injects fuel into a combustion chamber. Since the pressure detection element is provided on the injector, not only is it unnecessary to change the shape or structure of the cylinder head or the combustion chamber in order to provide the pressure detection element, but it is also possible to cool the pressure detection element (34) by fuel passing through the inside of the injector to thus enhance the precision of pressure detection and the durability.Type: GrantFiled: February 20, 2012Date of Patent: March 7, 2017Assignees: HONDA MOTOR CO., LTD., KEIHIN CORPORATIONInventors: Shusuke Akazaki, Yuji Yamamoto, Toshitaka Hachiro, Gaku Sato
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Publication number: 20170030313Abstract: A fuel injection valve equipped with an in-cylinder pressure sensor is provided, in which the fuel injection valve is fitted into an injection valve mounting hole provided in an engine, the in-cylinder pressure sensor is attached to a valve housing part of the fuel injection valve, the in-cylinder pressure sensor having a front end facing the combustion chamber and detecting a pressure of the combustion chamber, and a signal transmission device is connected to the in-cylinder pressure sensor, the signal transmission device transmitting an output signal thereof to an outside. The signal transmission device is disposed on the valve housing part and covered together with a part of the valve housing part by an insulating layer. In such arrangement, the signal transmission device is protected by the insulating layer, and a contact between the signal transmission device and an inner face of the injection valve mounting hole is prevented.Type: ApplicationFiled: October 12, 2016Publication date: February 2, 2017Inventors: Gaku SATO, Yuki KOJIMA, Nakaya NAKAMURA
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Publication number: 20160333813Abstract: A fuel injection control apparatus is provided with a first valve opening timing determination portion that determines a first valve opening timing on the basis of a collision signal that is included in detected signals of an in-cylinder pressure sensor and indicates a collision between a movable core and a valve element and a second valve opening timing determination portion that determines a second valve opening timing on the basis of another collision signal that is included in the detected signals and indicates a collision between the movable core and a stationary core.Type: ApplicationFiled: April 18, 2016Publication date: November 17, 2016Inventors: Takayuki SHIMATSU, Masamitsu MORI, Masateru MORIYA, Gaku SATO, Ikuhiro UEMURA
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Publication number: 20160333812Abstract: A drive current applied to a coil is reduced from a time at which a first collision signal indicating collision of a movable core with a valve element is input to a time at which a second collision signal indicating collision of the movable core with a stationary core is input.Type: ApplicationFiled: April 18, 2016Publication date: November 17, 2016Inventors: Takayuki SHIMATSU, Masamitsu MORI, Masateru MORIYA, Gaku SATO, Ikuhiro UEMURA
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Patent number: 9494095Abstract: A fuel injection valve equipped with an in-cylinder pressure sensor is provided in which a fuel injection valve is fitted into an injection valve mounting hole provided in an engine, the fuel injection valve injecting fuel from a front end of a valve housing part into a combustion chamber of the engine, and the in-cylinder pressure sensor, which is cylindrical and has a front end facing the combustion chamber, and a cylindrical signal circuit tube fitted and connected to an inner peripheral face of a rear end of the in-cylinder pressure sensor are fitted and fixed to an outer peripheral face of the valve housing part, housed in the injection valve mounting hole, of the fuel injection valve. In such fuel injection valve, the signal transmission device connected to an in-cylinder pressure sensor does not vibrate within an injection valve mounting hole, thus enabling its durability to be ensured.Type: GrantFiled: February 15, 2013Date of Patent: November 15, 2016Assignee: Keihin CorporationInventors: Gaku Sato, Yuki Kojima, Nakaya Nakamura
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Publication number: 20160281629Abstract: A control device includes a difference calculating unit configured to generate a difference waveform composed of the difference between a normal operation waveform, which is a voltage waveform of the fuel injection valve at a time that the fuel injection valve is operating, and a non-operation waveform, which is a voltage waveform of the fuel injection valve at a time that the fuel injection valve is not operating, a derivative calculating unit configured to generate a differentiated waveform obtained by differentiating the difference waveform, and an operating state determining unit configured to determine the operating state of the fuel injection valve based on the differentiated waveform.Type: ApplicationFiled: March 22, 2016Publication date: September 29, 2016Inventors: Masateru Moriya, Gaku Sato, Junichi Miyashita, Kousaku Yotoriyama
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Publication number: 20160208753Abstract: In a coupler unit of a resin mold portion that constitutes a fuel injection valve, power source terminals and a signal terminal, which are connected to an amplifying member, and a pair of drive terminals connected to a coil are disposed respectively in an exposed manner. Further, when the resin mold portion is molded from a resin material, in the interior of the coupler unit, a guide member is provided for positioning at predetermined locations the power source terminals, the signal terminal, and the drive terminals. With the guide member, by inserting the pair of power source terminals, the signal terminal, and the pair of drive terminals, respectively, through a plurality of first and second guide holes, the power source terminals, the signal terminal, and the drive terminals are positioned at locations separated mutually at predetermined intervals.Type: ApplicationFiled: December 16, 2015Publication date: July 21, 2016Inventors: Gaku Sato, Kenichi Yoshimura, Koji Suzuki, Keisuke Machida
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Publication number: 20160208754Abstract: In the interior of a resin mold portion that constitutes a fuel injection valve, an amplifying member to which a power source terminal and a signal terminal are connected, is provided, A signal transmitting unit, which outputs a detection signal from a sensor, is connected electrically to a substrate of the amplifying member. Further, the amplifying member is molded integrally when the resin mold portion is formed. In addition, a pressure inside a combustion chamber of an internal combustion engine, which is detected by the sensor, is output through the signal transmitting unit to the amplifying member, is amplified by the amplifying member, and is output externally from the signal terminal.Type: ApplicationFiled: December 16, 2015Publication date: July 21, 2016Inventors: Gaku Sato, Keisuke Machida, Kenichi Yoshimura, Koji Suzuki
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Publication number: 20160208729Abstract: Within a resin mold portion of a fuel injection valve, an amplifying member having a substrate is provided. An engagement hole that penetrates in an axial direction is formed in another end part of the amplifying member, and an engagement pin, which is formed on a bobbin of a housing, is inserted through the engagement hole. A second connector of a second signal transmitting member, which constitutes part of a signal transmitting unit, is inserted from below into a connecting hole formed in the substrate. In addition, when the resin mold portion is molded, the amplifying member is retained in a state with the engagement pin and the second connector being inserted, respectively, into the engagement hole and the connecting hole.Type: ApplicationFiled: December 16, 2015Publication date: July 21, 2016Inventors: Gaku Sato, Kenichi Yoshimura, Keisuke Machida, Koji Suzuki
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Publication number: 20160208755Abstract: A signal transmitting unit that makes up a fuel injection valve includes a first signal transmitting member a distal end of which is connected to a sensor, and a second signal transmitting member a proximal end of which is connected to an amplifying member. A first connector of the first signal transmitting member is formed in a convex shape, and is inserted into a concave part of a second connector in the second signal transmitting member and connected by solder. At this time, a clearance in a radial direction is included between the first connector and the concave part. Further, a third connector is formed on a proximal end of the second signal transmitting member, and is inserted into a connecting hole of the amplifying member and connected by solder. Further, a clearance in a radial direction is included between the third connector and the connecting hole.Type: ApplicationFiled: January 18, 2016Publication date: July 21, 2016Inventor: Gaku Sato
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Patent number: 9322372Abstract: A fuel injection valve includes a cylinder internal pressure sensor disposed in the vicinity of a distal end thereof. The cylinder internal pressure sensor detects a cylinder internal pressure in a cylinder and outputs a first sensor signal Ss1 responsive to the detected cylinder internal pressure. Further, a signal processor, which carries out predetermined signal processing with respect to the first sensor signal Ss1 to thereby convert the first sensor signal Ss1 into a second sensor signal Ss2, is disposed between the cylinder internal pressure sensor and a solenoid unit, which is disposed on a proximal end side of the fuel injection valve.Type: GrantFiled: April 17, 2014Date of Patent: April 26, 2016Assignees: KEIHIN CORPORATION, HONDA MOTOR CO., LTD.Inventors: Yoshihiro Kaneko, Gaku Sato, Junichi Fukuda, Mitsuhiro Iwadare, Tetsuji Furukawa, Takeshi Kumakura, Minoru Torii
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Publication number: 20150059699Abstract: A fuel injection valve equipped with an in-cylinder pressure sensor is provided in which a fuel injection valve is fitted into an injection valve mounting hole provided in an engine, the fuel injection valve injecting fuel from a front end of a valve housing part into a combustion chamber of the engine, and the in-cylinder pressure sensor, which is cylindrical and has a front end facing the combustion chamber, and a cylindrical signal circuit tube fitted and connected to an inner peripheral face of a rear end of the in-cylinder pressure sensor are fitted and fixed to an outer peripheral face of the valve housing part, housed in the injection valve mounting hole, of the fuel injection valve. In such fuel injection valve, the signal transmission device connected to an in-cylinder pressure sensor does not vibrate within an injection valve mounting hole, thus enabling its durability to be ensured.Type: ApplicationFiled: February 15, 2013Publication date: March 5, 2015Inventors: Gaku Sato, Yuki Kojima, Nakaya Nakamura
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Publication number: 20140316646Abstract: A fuel injection valve includes a cylinder internal pressure sensor disposed in the vicinity of a distal end thereof. The cylinder internal pressure sensor detects a cylinder internal pressure in a cylinder and outputs a first sensor signal Ss1 responsive to the detected cylinder internal pressure. Further, a signal processor, which carries out predetermined signal processing with respect to the first sensor signal Ss1 to thereby convert the first sensor signal Ss1 into a second sensor signal Ss2, is disposed between the cylinder internal pressure sensor and a solenoid unit, which is disposed on a proximal end side of the fuel injection valve.Type: ApplicationFiled: April 17, 2014Publication date: October 23, 2014Applicants: Keihin Corporation, Honda Motor Co., Ltd.Inventors: Yoshihiro Kaneko, Gaku Sato, Junichi Fukuda, Mitsuhiro Iwadare, Tetsuji Furukawa, Takeshi Kumakura, Minoru Torii