Patents by Inventor Kenichiroh Ogata
Kenichiroh Ogata 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: 11060476Abstract: In an internal combustion engine which performs a homogeneous lean combustion mode and a stratified lean combustion mode, there is provided a new internal combustion engine control device capable of obtaining a stable combustion state by decreasing influences of delay of an air flow and a degree of change of a transient state and smoothly performing switching between the homogeneous lean combustion mode and the stratified lean combustion mode.Type: GrantFiled: September 13, 2017Date of Patent: July 13, 2021Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Kenichiroh Ogata, Yoshinobu Arihara, Hisahiro Ooba, Takaki Itaya
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Publication number: 20210140388Abstract: 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: ApplicationFiled: May 11, 2018Publication date: May 13, 2021Inventors: Ryo KUSAKABE, Yoshihiro SUKEGAWA, Kenichiroh OGATA, Masayuki SARUWATARI
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Publication number: 20200032735Abstract: In an internal combustion engine which performs a homogeneous lean combustion mode and a stratified lean combustion mode, there is provided a new internal combustion engine control device capable of obtaining a stable combustion state by decreasing influences of delay of an air flow and a degree of change of a transient state and smoothly performing switching between the homogeneous lean combustion mode and the stratified lean combustion mode.Type: ApplicationFiled: September 13, 2017Publication date: January 30, 2020Applicant: Hitachi Automotive Systems, Ltd.Inventors: Kenichiroh OGATA, Yoshinobu ARIHARA, Hisahiro OOBA, Takaki ITAYA
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Patent number: 10495021Abstract: Provided is an engine control device capable of suppressing deterioration of combustion stability due to a change in engine temperature in an engine which performs lean combustion or EGR combustion. When lean combustion in which an air-fuel mixture leaner than a stoichiometric air-fuel ratio is burned or exhaust gas recirculation combustion in which a diluted air-fuel mixture is burned by re-suctioning exhaust gas discharged from the combustion chamber into the combustion chamber is performed, a ratio of a fuel injection amount during a compression stroke to a total fuel injection amount during one combustion cycle is increased as a temperature of an engine decreases.Type: GrantFiled: January 10, 2017Date of Patent: December 3, 2019Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Kenichiroh Ogata, Yoshinobu Arihara, Hisahiro Ooba, Takaki Itaya
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Patent number: 10233799Abstract: An engine control device sets a target value for the engine oil temperature appropriately in an engine that uses gasoline as a fuel, even when the fuel does not have a single boiling point because the gasoline is a mixed composition, or when the fuel property changes (for example, when the vaporization property changes due to deterioration). In other words, the engine control device prevents excessive heating or insufficient heating by changing the oil temperature to the high side in a condition wherein the fuel being used does not easily vaporize, and changing the oil temperature to the low side in a condition wherein the fuel being used easily vaporizes. This engine control device includes an oil temperature controller that controls the temperature of oil lubricating the interior of the engine; a fuel supply device that supplies fuel to the engine; and a detector for detecting the property of the fuel. The temperature of the oil is controlled on the basis of a signal from the detector.Type: GrantFiled: January 7, 2015Date of Patent: March 19, 2019Assignee: Hitachi Automotive Systems, Ltd.Inventors: Kenichiroh Ogata, Takashi Okamoto, Yoshinobu Arihara, Yoshihiro Sukegawa
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Patent number: 10227935Abstract: The purpose of the present invention is to provide an engine control system that is capable of promoting mixing of fuel and air during exhaust gas recirculation, thereby suppressing combustion fluctuation of a gasoline engine, such that efficiency and exhaust gas purification can be simultaneously achieved. The engine control system controls an engine and is equipped with an injection device for injecting fuel directly into a cylinder and a recirculation device for recirculating exhaust gas to the intake side.Type: GrantFiled: January 7, 2015Date of Patent: March 12, 2019Assignee: Hitachi Autmotive Systems, Ltd.Inventors: Kenichiroh Ogata, Takashi Okamoto, Yoshinobu Arihara
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Publication number: 20190063363Abstract: Provided is an engine control device capable of suppressing deterioration of combustion stability due to a change in engine temperature in an engine which performs lean combustion or EGR combustion. When lean combustion in which an air-fuel mixture leaner than a stoichiometric air-fuel ratio is burned or exhaust gas recirculation combustion in which a diluted air-fuel mixture is burned by re-suctioning exhaust gas discharged from the combustion chamber into the combustion chamber is performed, a ratio of a fuel injection amount during a compression stroke to a total fuel injection amount during one combustion cycle is increased as a temperature of an engine decreases.Type: ApplicationFiled: January 10, 2017Publication date: February 28, 2019Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Kenichiroh OGATA, Yoshinobu ARIHARA, Hisahiro OOBA, Takaki ITAYA
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Publication number: 20170314500Abstract: The purpose of the present invention is to provide an engine control device with which it is possible to minimize decreases in combustion speed even when the EGR rate has been increased.Type: ApplicationFiled: September 16, 2015Publication date: November 2, 2017Inventors: Kenichiroh OGATA, Takashi OKAMOTO, Yoshinobu ARIHARA, Kazuhiro ORYOJI, Yoshihiro SUKEGAWA, Yuusuke KIHARA
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Patent number: 9702779Abstract: In order to solve a problem that in an internal combustion engine in which abnormal combustion (knocking or an accidental fire) of an engine is detected from an ion signal, the setting of an abnormal combustion determination threshold value under a transient condition in which an engine operating state abruptly changes is difficult to thereby cause erroneous determination, the present invention is an engine control device provided with an ion signal detection means for detecting ions generated during combustion, and provided with an abnormal combustion determination means for determining knocking or an accidental fire according to an ion signal detected by the detection means, the engine control device being characterized by being provided with an in-cylinder temperature estimation means for estimating the in-cylinder temperature in a normal combustion cycle under a current operating condition of the engine, and by setting the knocking determination threshold value or accidental fire determination threshold vType: GrantFiled: March 13, 2013Date of Patent: July 11, 2017Assignee: Hitachi Automotive Systems, Ltd.Inventors: Kengo Kumano, Yoshihiko Akagi, Takuya Shiraishi, Kenichiroh Ogata
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Publication number: 20170074178Abstract: The purpose of the present invention is to provide an engine control system that is capable of promoting mixing of fuel and air during exhaust gas recirculation, thereby suppressing combustion fluctuation of a gasoline engine, such that efficiency and exhaust gas purification can be simultaneously achieved. The engine control system controls an engine and is equipped with an injection device for injecting fuel directly into a cylinder and a recirculation device for recirculating exhaust gas to the intake side.Type: ApplicationFiled: January 7, 2015Publication date: March 16, 2017Inventors: Kenichiroh OGATA, Takashi OKAMOTO, Yoshinobu ARIHARA
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Publication number: 20170009621Abstract: An engine control device sets a target value for the engine oil temperature appropriately in an engine that uses gasoline as a fuel, even when the fuel does not have a single boiling point because the gasoline is a mixed composition, or when the fuel property changes (for example, when the vaporization property changes due to deterioration). In other words, the engine control device prevents excessive heating or insufficient heating by changing the oil temperature to the high side in a condition wherein the fuel being used does not easily vaporize, and changing the oil temperature to the low side in a condition wherein the fuel being used easily vaporizes. This engine control device includes an oil temperature controller that controls the temperature of oil lubricating the interior of the engine; a fuel supply device that supplies fuel to the engine; and a detector for detecting the property of the fuel. The temperature of the oil is controlled on the basis of a signal from the detector.Type: ApplicationFiled: January 7, 2015Publication date: January 12, 2017Inventors: Kenichiroh OGATA, Takashi OKAMOTO, Yoshinobu ARIHARA, Yoshihiro SUKEGAWA
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Patent number: 9494098Abstract: Although a method for changing a combustion method taking place in an internal combustion engine depending on running condition is proposed, it can be considered that conditions under which a combustion noise occurs naturally differ with different methods. A detection method of prior art is not compatible with different combustion methods and the accuracy of combustion noise detection was low. Accurate combustion noise detection is enabled by identifying a combustion mode taking place in the internal combustion engine, selecting a sensed frequency or frequency band of a combustion noise sensor that detects a combustion noise in a combustion chamber of the internal combustion engine according to the combustion mode, and detecting a combustion noise.Type: GrantFiled: July 26, 2012Date of Patent: November 15, 2016Assignee: Hitachi Automotive Systems, Ltd.Inventors: Kenichiroh Ogata, Daisuke Watanabe, Takashi Okamoto
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Patent number: 9188078Abstract: An object of the present invention is to obtain a control apparatus of an internal combustion engine capable of respectively accurately detecting a combustion change in a plurality of combustion modes. In the present invention, the control apparatus of the internal combustion engine operable upon switching the combustion mode sets a detection time and a detection duration to detect a sensor signal of a crank angle sensor 10 in accordance with the combustion mode, and determines whether or not there is the combustion change based on the sensor signal detected by the crank angle sensor 10 at the detection time and for the detection duration set by the control apparatus.Type: GrantFiled: December 6, 2011Date of Patent: November 17, 2015Assignee: Hitachi Automotive Systems, Ltd.Inventors: Kenichiroh Ogata, Kenichi Machida
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Publication number: 20150128683Abstract: In order to solve a problem that in an internal combustion engine in which abnormal combustion (knocking or an accidental fire) of an engine is detected from an ion signal, the setting of an abnormal combustion determination threshold value under a transient condition in which an engine operating state abruptly changes is difficult to thereby cause erroneous determination, the present invention is an engine control device provided with an ion signal detection means for detecting ions generated during combustion, and provided with an abnormal combustion determination means for determining knocking or an accidental tire according to an ion signal detected by the detection means, the engine control device being characterized by being provided with an in-cylinder temperature estimation means for estimating the in-cylinder temperature in a normal combustion cycle under a current operating condition of the engine, and by setting the knocking determination threshold value or accidental fire determination threshold vType: ApplicationFiled: March 13, 2013Publication date: May 14, 2015Inventors: Kengo Kumano, Yoshihiko Akagi, Takuya Shiraishi, Kenichiroh Ogata
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Publication number: 20150019112Abstract: Knocking and misfire are judged by detecting combustion ions generated in a combustion chamber with an ion sensor, obtaining an integral signal by integrating the ion signal, and comparing the integral signal with a misfire judgment value and a knocking judgment value based on a signal obtained by averaging integral signals of prescribed past cycles. It is possible to: reduce a computation load by detecting misfire and knocking with an identical ion sensor and carrying out a judgment treatment with identical judgment function logic; and detect trace knocking by setting a knocking judgment threshold value and hence increase the accuracy of ignition timing control.Type: ApplicationFiled: February 6, 2013Publication date: January 15, 2015Applicant: Hitachi Automotive Systems, Ltd.Inventors: Takuya Shiraishi, Kengo Kumano, Kenichiroh Ogata, Yoshihiko Akagi, Shinya Matohara
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Publication number: 20140172280Abstract: Although a method for changing a combustion method taking place in an internal combustion engine depending on running condition is proposed, it can be considered that conditions under which a combustion noise occurs naturally differ with different methods. A detection method of prior art is not compatible with different combustion methods and the accuracy of combustion noise detection was low. Accurate combustion noise detection is enabled by identifying a combustion mode taking place in the internal combustion engine, selecting a sensed frequency or frequency band of a combustion noise sensor that detects a combustion noise in a combustion chamber of the internal combustion engine according to the combustion mode, and detecting a combustion noise.Type: ApplicationFiled: July 26, 2012Publication date: June 19, 2014Applicant: Hitachi Automotive Systems, Ltd.Inventors: Kenichiroh Ogata, Daisuke Watanabe, Takashi Okamoto
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Publication number: 20130261938Abstract: An object of the present invention is to obtain a control apparatus of an internal combustion engine capable of respectively accurately detecting a combustion change in a plurality of combustion modes. In the present invention, the control apparatus of the internal combustion engine operable upon switching the combustion mode sets a detection time and a detection duration to detect a sensor signal of a crank angle sensor 10 in accordance with the combustion mode, and determines whether or not there is the combustion change based on the sensor signal detected by the crank angle sensor 10 at the detection time and for the detection duration set by the control apparatus.Type: ApplicationFiled: December 6, 2011Publication date: October 3, 2013Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTDInventors: Kenichiroh Ogata, Kenichi Machida
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Patent number: 8387587Abstract: When a direct injection type internal combustion engine is in an operating state, a fuel is split and jetted into a cylinder of the internal combustion engine and split injections are performed in a manner to make a ratio of a piston travel and an injection pulse width of split injection constant in a cycle whereby a rich mixture is not locally generated and a mixture in a cylinder of the internal combustion engine is put in a condition near stoichiometry. Also, when the internal combustion engine is in cold condition, a fuel is split and jetted and split injections are performed so that the ratio of the piston travel and the injection pulse width of split injections monotonously increases in a cycle.Type: GrantFiled: February 16, 2011Date of Patent: March 5, 2013Assignee: Hitachi Automotive Systems, Ltd.Inventors: Kenichiroh Ogata, Yoshihiro Sukegawa, Kengo Kumano
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Publication number: 20110226214Abstract: When a direct injection type internal combustion engine is in an operating state, a fuel is split and jetted into a cylinder of the internal combustion engine and split injections are performed in a manner to make a ratio of a piston travel and an injection pulse width of split injection constant in a cycle whereby a rich mixture is not locally generated and a mixture in a cylinder of the internal combustion engine is put in a condition near stoichiometry. Also, when the internal combustion engine is in cold condition, a fuel is split and jetted and split injections are performed so that the ratio of the piston travel and the injection pulse width of split injections monotonously increases in a cycle.Type: ApplicationFiled: February 16, 2011Publication date: September 22, 2011Applicant: Hitachi Automotive Systems, Ltd.Inventors: Kenichiroh Ogata, Yoshihiro Sukegawa, Kengo Kumano