Patents by Inventor Hiroshi Minamoto
Hiroshi Minamoto 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: 10731547Abstract: A smooth shift is achieved between an operating region in which a first turbocharger is mainly operated and an operating region in which a second turbocharger is mainly operated. A PCM controls a throttle valve to use a first supercharging region in which a gas flow through an exhaust bypass passage is reduced and a second supercharging region in which the gas flow through the exhaust bypass passage is promoted differently based on the operating state of an engine. In an early stage of a shift from the first supercharging region to the second supercharging region, the PCM executes bridge control to allow the flow velocity of exhaust gas flowing into a large turbine to be higher than at a point in time at which the shift starts.Type: GrantFiled: October 18, 2018Date of Patent: August 4, 2020Assignee: Mazda Motor CorporationInventors: Hiroshi Minamoto, Nobuo Yunoki, Kenichiro Suzuki
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Patent number: 10669966Abstract: The silence of a diesel engine is enhanced. A PCM detects an actual supercharging pressure of a gas, and controls an injection mode of a fuel through an injector, thereby executing main injection that is started near a compression top dead center or pilot injection that is executed prior to the main injection depending on an operating state of an engine. If the degree of opening of an accelerator pedal decreases during operation of a large turbocharger, and the actual supercharging pressure is equal to or higher than a predetermined value, the PCM executes cylinder pressure control that allows an interval between a start timing of the pilot injection and a start timing of the main injection to be broader than if the actual supercharging pressure is less than a predetermined value.Type: GrantFiled: October 10, 2018Date of Patent: June 2, 2020Assignee: Mazda Motor CorporationInventors: Kazuma Suesada, Hiroshi Minamoto, Yasunori Uesugi
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Patent number: 10662842Abstract: In an engine which includes an oxidation catalyst and an SCR catalyst in an exhaust passage, a first flow regulating control in which a control valve is controlled so as to decrease a flow rate of an exhaust gas which passes through the oxidation catalyst and the SCR catalyst is performed in a case where the oxidation catalyst is in a low temperature state at the time of performing deceleration fuel cut, and a second flow regulating control in which the control valve is controlled so as to increase the flow rate of the exhaust gas which passes through the oxidation catalyst and the SCR catalyst is performed in a case where the oxidation catalyst is in a temperature state higher than the low temperature state and the SCR catalyst is in a low temperature state at the time of performing the deceleration fuel cut.Type: GrantFiled: August 22, 2018Date of Patent: May 26, 2020Assignee: Mazda Motor CorporationInventors: Masato Katsuta, Yasunori Uesugi, Hiroshi Minamoto
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Patent number: 10570808Abstract: A control system of an engine is provided, which includes a piston formed with a cavity and configured to reciprocate in a cylinder along a center axis of the cylinder, and a fuel injector disposed facing a top surface of the piston and configured to inject fuel along an injection axis. When the piston is located near a top dead center of compression stroke, the fuel injector performs a first injection so that the fuel flows from the fuel injector toward the cavity along the injection axis, collides with an inner surface of the cavity, then flows back toward the fuel injector along the inner surface of the cavity from a position offset from the injection axis. The fuel injector performs a second injection toward the cavity at a timing after the first injection and at which the fuel of the first injection flows back.Type: GrantFiled: May 7, 2018Date of Patent: February 25, 2020Assignee: Mazda Motor CorporationInventors: Daisuke Fukuda, Akira Taguchi, Hiroshi Minamoto, Naotoshi Shirahashi, Yudai Kato, Yoshie Kakuda, Yasuyuki Sagane, Sangkyu Kim, Daisuke Shimo, Kazunori Hirabayashi
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Patent number: 10323592Abstract: An exhaust gas recirculation control device for an engine is provided. The device includes an EGR passage connecting an exhaust passage of the engine with an intake passage of the engine, an EGR amount adjustor for adjusting an EGR amount that is a recirculation amount of exhaust gas of the engine through the EGR passage, an adjustor controller for controlling the EGR adjustor to adjust the EGR amount, and a gear position detector for detecting a gear position of a transmission of a vehicle on which the engine is mounted. When the gear position detected by the gear position detector during an idle operation of the engine is a non-travel position, the adjustor controller performs an EGR amount increase control in which the EGR amount adjustor is controlled to increase the EGR amount to be higher than when the gear position is a travel position.Type: GrantFiled: August 7, 2015Date of Patent: June 18, 2019Assignee: Mazda Motor CorporationInventors: Hiroshi Minamoto, Kotaro Takahashi
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Publication number: 20190120128Abstract: A smooth shift is achieved between an operating region in which a first turbocharger is mainly operated and an operating region in which a second turbocharger is mainly operated. A PCM controls a throttle valve to use a first supercharging region in which a gas flow through an exhaust bypass passage is reduced and a second supercharging region in which the gas flow through the exhaust bypass passage is promoted differently based on the operating state of an engine. In an early stage of a shift from the first supercharging region to the second supercharging region, the PCM executes bridge control to allow the flow velocity of exhaust gas flowing into a large turbine to be higher than at a point in time at which the shift starts.Type: ApplicationFiled: October 18, 2018Publication date: April 25, 2019Inventors: Hiroshi Minamoto, Nobuo Yunoki, Kenichiro Suzuki
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Publication number: 20190112997Abstract: The silence of a diesel engine is enhanced. A PCM detects an actual supercharging pressure of a gas, and controls an injection mode of a fuel through an injector, thereby executing main injection that is started near a compression top dead center or pilot injection that is executed prior to the main injection depending on an operating state of an engine. If the degree of opening of an accelerator pedal decreases during operation of a large turbocharger, and the actual supercharging pressure is equal to or higher than a predetermined value, the PCM executes cylinder pressure control that allows an interval between a start timing of the pilot injection and a start timing of the main injection to be broader than if the actual supercharging pressure is less than a predetermined value.Type: ApplicationFiled: October 10, 2018Publication date: April 18, 2019Inventors: Kazuma Suesada, Hiroshi Minamoto, Yasunori Uesugi
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Publication number: 20190093529Abstract: In an engine which includes an oxidation catalyst and an SCR catalyst in an exhaust passage, a first flow regulating control in which a control valve is controlled so as to decrease a flow rate of an exhaust gas which passes through the oxidation catalyst and the SCR catalyst is performed in a case where the oxidation catalyst is in a low temperature state at the time of performing deceleration fuel cut, and a second flow regulating control in which the control valve is controlled so as to increase the flow rate of the exhaust gas which passes through the oxidation catalyst and the SCR catalyst is performed in a case where the oxidation catalyst is in a temperature state higher than the low temperature state and the SCR catalyst is in a low temperature state at the time of performing the deceleration fuel cut.Type: ApplicationFiled: August 22, 2018Publication date: March 28, 2019Inventors: Masato Katsuta, Yasunori Uesugi, Hiroshi Minamoto
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Publication number: 20180340488Abstract: A control system of an engine is provided, which includes a piston formed with a cavity and configured to reciprocate in a cylinder along a center axis of the cylinder, and a fuel injector disposed facing a top surface of the piston and configured to inject fuel along an injection axis. When the piston is located near a top dead center of compression stroke, the fuel injector performs a first injection so that the fuel flows from the fuel injector toward the cavity along the injection axis, collides with an inner surface of the cavity, then flows back toward the fuel injector along the inner surface of the cavity from a position offset from the injection axis. The fuel injector performs a second injection toward the cavity at a timing after the first injection and at which the fuel of the first injection flows back.Type: ApplicationFiled: May 7, 2018Publication date: November 29, 2018Inventors: Daisuke Fukuda, Akira Taguchi, Hiroshi Minamoto, Naotoshi Shirahashi, Yudai Kato, Yoshie Kakuda, Yasuyuki Sagane, Sangkyu Kim, Daisuke Shimo, Kazunori Hirabayashi
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Publication number: 20170292436Abstract: A diesel engine of the present invention includes a turbocharger including: a turbine provided on an exhaust passage; a compressor provided on an intake passage; and a plurality of nozzle vanes provided around the turbine to control a flow velocity of an exhaust gas colliding with the turbine, angles of the nozzle vanes being changeable. In a case where a ratio of a volume of a combustion chamber when the intake valve is closed to a volume of the combustion chamber when a piston is located at a top dead center is denoted by an effective compression ratio ?e, and a total displacement of the engine is denoted by V (L), the effective compression ratio ?e is set to satisfy Formula (1) “?0.67×V+15.2??e?14.8.Type: ApplicationFiled: June 5, 2015Publication date: October 12, 2017Inventors: Yoshie Kakuda, Daisuke Shimo, Sangkyu Kim, Hiroshi Minamoto, Kazuya Niida
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Publication number: 20170234252Abstract: The engine controller includes an acceleration input detector that detects an accelerator pedal motion, a fuel injection amount calculator that calculates a target fuel injection amount, a fuel injection controller that controls the fuel injector, an EGR valve opening calculator that calculates a target EGR valve opening, and an EGR controller that controls the EGR valve. The EGR controller controls, after the accelerator pedal motion has been given, the EGR valve in a direction to decrease an opening of the EGR valve to a target EGR valve opening corresponding to a running condition to be reached after the accelerator pedal motion has been given. The control of the EGR valve opening is started before the fuel injection controller controls the fuel injector based on the target fuel injection amount calculated by the fuel injection amount calculator based on the accelerator pedal motion.Type: ApplicationFiled: February 1, 2017Publication date: August 17, 2017Applicant: MAZDA MOTOR CORPORATIONInventors: Yasunori UESUGI, Hiroshi MINAMOTO, Kenko UJIHARA, Yoichi FUJIOKA
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Publication number: 20160069300Abstract: An exhaust gas recirculation control device for an engine is provided. The device includes an EGR passage connecting an exhaust passage of the engine with an intake passage of the engine, an EGR amount adjustor for adjusting an EGR amount that is a recirculation amount of exhaust gas of the engine through the EGR passage, an adjustor controller for controlling the EGR adjustor to adjust the EGR amount, and a gear position detector for detecting a gear position of a transmission of a vehicle on which the engine is mounted. When the gear position detected by the gear position detector during an idle operation of the engine is a non-travel position, the adjustor controller performs an EGR amount increase control in which the EGR amount adjustor is controlled to increase the EGR amount to be higher than when the gear position is a travel position.Type: ApplicationFiled: August 7, 2015Publication date: March 10, 2016Inventors: Hiroshi Minamoto, Kotaro Takahashi
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Patent number: 9234478Abstract: A geometric compression ratio in an engine main body 1 is set to 15 or less. Injection control means (ECU 40) performs a main injection of injecting fuel near a compression top dead center, and a preceding injection prior to the main injection at a specific region of predetermined load within an operating region on a relatively low-speed side. The injection control means performs, as the preceding injection, a pilot injection of performing injection at a timing such that at least part of a fuel spray reaches outside a cavity 31 on a top face of a piston, and a pre-injection of injecting fuel at a predetermined timing after the pilot injection, to suppress thereby ignition of the fuel injected by the pilot injection and shorten an ignition delay of the fuel injected by the main injection.Type: GrantFiled: May 9, 2011Date of Patent: January 12, 2016Assignee: MAZDA MOTOR CORPORATIONInventors: Shinichi Morinaga, Daisuke Shimo, Keiji Maruyama, Hiroshi Minamoto, Naotoshi Shirahashi, Daisuke Fukuda
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Patent number: 8682568Abstract: A diesel engine is provided, which includes an engine body to be supplied with fuel containing diesel fuel as its main component, a geometric compression ratio being set to 15:1 or below, a fuel injection valve arranged in the engine body so as to be oriented toward a cylinder of the engine body and for directly injecting the fuel into the cylinder, and a control module for controlling a mode of injecting the fuel into the cylinder through the fuel injection valve. The control module performs a main injection where the fuel is injected to cause a main combustion mainly including a diffusion combustion and performs a plurality of pre-stage injections where the fuel is injected prior to the main injection to cause a pre-stage combustion prior to the main combustion. The control module controls the injection mode of the injections to adjust a heat release rate.Type: GrantFiled: June 28, 2011Date of Patent: March 25, 2014Assignee: Mazda Motor CorporationInventors: Daisuke Shimo, Kim Sangkyu, Kyotaro Nishimoto, Shinichi Morinaga, Keiji Maruyama, Hiroshi Minamoto, Masayuki Tetsuno, Masahiro Nagoshi
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Publication number: 20130073186Abstract: A geometric compression ratio in an engine main body 1 is set to 15 or less. Injection control means (ECU 40) performs a main injection of injecting fuel near a compression top dead center, and a preceding injection prior to the main injection at a specific region of predetermined load within an operating region on a relatively low-speed side. The injection control means performs, as the preceding injection, a pilot injection of performing injection at a timing such that at least part of a fuel spray reaches outside a cavity 31 on a top face of a piston, and a pre-injection of injecting fuel at a predetermined timing after the pilot injection, to suppress thereby ignition of the fuel injected by the pilot injection and shorten an ignition delay of the fuel injected by the main injection.Type: ApplicationFiled: May 9, 2011Publication date: March 21, 2013Applicant: MAZDA MOTOR CORPORATIONInventors: Shinichi Morinaga, Daisuke Shimo, Keiji Maruyama, Hiroshi Minamoto, Naotoshi Shirahashi, Daisuke Fukuda
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Publication number: 20120004826Abstract: A diesel engine is provided, which includes an engine body to be supplied with fuel containing diesel fuel as its main component, a geometric compression ratio being set to 15:1 or below, a fuel injection valve arranged in the engine body so as to be oriented toward a cylinder of the engine body and for directly injecting the fuel into the cylinder, and a control module for controlling a mode of injecting the fuel into the cylinder through the fuel injection valve. The control module performs a main injection where the fuel is injected to cause a main combustion mainly including a diffusion combustion and performs a plurality of pre-stage injections where the fuel is injected prior to the main injection to cause a pre-stage combustion prior to the main combustion. The control module controls the injection mode of the injections to adjust a heat release rate.Type: ApplicationFiled: June 28, 2011Publication date: January 5, 2012Applicant: Mazda Motor CorporationInventors: Daisuke Shimo, Kim Sangkyu, Kyotaro Nishimoto, Shinichi Morinaga, Keiji Maruyama, Hiroshi Minamoto, Masayuki Tetsuno, Masahiro Nagoshi
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Patent number: 6561484Abstract: A gate valve according to the present invention including a first valve plate having a valve opening, a second valve plate connected to the first valve plate via first bellows, and an actuator provided between the first valve plate and the second valve plate, wherein the first valve plate is moved by the operation of the actuator, thereby enabling the valve plate, a valve rod, and the like to be made small and lightweight.Type: GrantFiled: September 28, 2001Date of Patent: May 13, 2003Assignee: Irie Koken Co., Ltd.Inventors: Masaharu Nakagawa, Hiroshi Minamoto, Manabu Yabe, Yuuzou Hayashi, Norikimi Irie
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Publication number: 20020074534Abstract: A gate valve according to the present invention comprises a first valve plate having a valve openings, a second valve plate connected to the first valve plate via first bellows, and an actuator provided between the first valve plate and the second valve plate, wherein the first valve plate is moved by the operation of the actuator, thereby enabling the valve plate, a valve rod, and the like to be made small and lightweight.Type: ApplicationFiled: September 28, 2001Publication date: June 20, 2002Applicant: IRIE KOKEN CO., LTD.Inventors: Masaharu Nakagawa, Hiroshi Minamoto, Manabu Yabe, Yuuzou Hayashi, Norikimi Irie
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Patent number: 4976491Abstract: A front body construction of a motor vehicle includes a lower dash panel for separating an engine compartment and a cabin and a cowl portion provided on the lower dash panel such that a lower end of a windshield is supported at an upper portion of the cowl portion. The cowl portion includes an upper dash panel attached to an upper end portion of the lower dash panel so as to form a bottom wall of the cowl portion and a front cowl panel attached to an upper face of the upper dash panel so as to form a front wall of the cowl portion. The front cowl panel has, in a lateral direction of a vehicle body, opposite sides and a central portion such that space for an auxiliary unit is provided not only forwards of the front cowl panel in a longitudinal direction of the vehicle body, but also on at least one of the opposite sides of the front cowl panel.Type: GrantFiled: May 1, 1989Date of Patent: December 11, 1990Assignee: Mazda Motor CorporationInventors: Teruo Hashimoto, Yoshio Fukushima, Toshifumi Suzuki, Hiroshi Minamoto