Patents by Inventor Yasunori UESUGI
Yasunori UESUGI 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: 11230991Abstract: In a compression-ignition engine having a two-stage cavity, the distribution ratio between fuel for an upper cavity and fuel for a lower cavity is maintained even when the operational state of the engine changes. A piston of the engine includes a lower cavity, an upper cavity, and a lip portion between the lower cavity and the upper cavity. A controller causes a main injection and at least one pilot injection to be executed when an engine operates in a first state and a second state in which the speed is higher than the speed in the first state. The fuel spray is distributed to the lower cavity and the upper cavity. The controller maintains an injection amount of the main injection and increases an injection amount of the pilot injection(s) when the engine operates in the second state as compared to when the engine operates in the first state.Type: GrantFiled: January 23, 2020Date of Patent: January 25, 2022Assignee: Mazda Motor CorporationInventors: Naotoshi Shirahashi, Yasunori Uesugi, Takeshi Matsubara
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Patent number: 11215136Abstract: In a compression-ignition engine having a two-stage cavity, the distribution ratio between fuel for an upper cavity and fuel for a lower cavity is maintained even when the operational state of the engine changes. A piston of the compression-ignition engine includes a lower cavity, an upper cavity, and a lip portion between the lower cavity and the upper cavity. A controller causes a main injection and at least one pilot injection to be executed when the engine operates in a first state and a second state in which the speed is higher than the speed in the first state. The fuel spray is distributed to the lower cavity and the upper cavity. The controller increases an injection amount per pilot injection when the engine operates in the second state than when the engine operates in the first state.Type: GrantFiled: January 23, 2020Date of Patent: January 4, 2022Assignee: Mazda Motor CorporationInventors: Naotoshi Shirahashi, Yasunori Uesugi, Takeshi Matsubara
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Patent number: 11078828Abstract: In a compression-ignition engine having a two-stage cavity, the distribution ratio between fuel for an upper cavity and fuel for a lower cavity is maintained even when the operational state of the engine changes. A piston of the compression-ignition engine includes a lower cavity, an upper cavity, and a lip portion between the lower cavity and the upper cavity. A controller causes a main injection and at least one pilot injection to be executed when the engine operates in a first state and a second state in which the load is higher than the load in the first state. The fuel spray is distributed to the lower cavity and the upper cavity. The controller causes a ratio of injection amount per pilot injection to the total injection amount to be higher when the engine operates in the second state than when the engine operates in the first state.Type: GrantFiled: January 23, 2020Date of Patent: August 3, 2021Assignee: Mazda Motor CorporationInventors: Naotoshi Shirahashi, Yasunori Uesugi, Takeshi Matsubara
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Patent number: 10844805Abstract: In a compression-ignition engine having a two-stage cavity, the distribution ratio between fuel for an upper cavity and fuel for a lower cavity is maintained even when the operational state of the engine changes. A piston of the engine includes a lower cavity, an upper cavity, and a lip portion therebetween. A controller causes a main injection and at least one pilot injection to be executed when the engine operates in a first state and a second state in which the load is lower than the load in the first state. The fuel spray is distributed to the lower cavity and the upper cavity. The controller sets the timing of the pilot injection(s) so that the distribution ratio of the fuel spray of the pilot injection(s) for the lower cavity is higher when the engine operates in the first state than when in the second state.Type: GrantFiled: January 23, 2020Date of Patent: November 24, 2020Assignee: Mazda Motor CorporationInventors: Naotoshi Shirahashi, Yasunori Uesugi, Takeshi Matsubara
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Patent number: 10815927Abstract: In a compression-ignition engine having a two-stage cavity, the distribution ratio between fuel for an upper cavity and fuel for a lower cavity is maintained even when the operational state of the engine changes. A piston of the engine includes a lower cavity, an upper cavity, and a lip portion between the lower cavity and the upper cavity. A controller causes a main injection and at least one pilot injection to be executed when the engine operates in a first state and a second state in which the load is lower than the load in the first state. The fuel spray is distributed to the lower cavity and the upper cavity. The controller outputs a control signal to a fuel injection valve so that a distribution ratio for the upper cavity is higher when the engine operates in the second state than when in the first state.Type: GrantFiled: January 23, 2020Date of Patent: October 27, 2020Assignee: Mazda Motor CorporationInventors: Naotoshi Shirahashi, Yasunori Uesugi, Takeshi Matsubara
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Publication number: 20200240332Abstract: In a compression-ignition engine having a two-stage cavity, the distribution ratio between fuel for an upper cavity and fuel for a lower cavity is maintained even when the operational state of the engine changes. A piston of the compression-ignition engine includes a lower cavity, an upper cavity, and a lip portion between the lower cavity and the upper cavity. A controller causes a main injection and at least one pilot injection to be executed when the engine operates in a first state and a second state in which the load is higher than the load in the first state. The fuel spray is distributed to the lower cavity and the upper cavity. The controller causes a ratio of injection amount per pilot injection to the total injection amount to be higher when the engine operates in the second state than when the engine operates in the first state.Type: ApplicationFiled: January 23, 2020Publication date: July 30, 2020Inventors: Naotoshi Shirahashi, Yasunori Uesugi, Takeshi Matsubara
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Publication number: 20200240352Abstract: In a compression-ignition engine having a two-stage cavity, the distribution ratio between fuel for an upper cavity and fuel for a lower cavity is maintained even when the operational state of the engine changes. A piston of the engine includes a lower cavity, an upper cavity, and a lip portion between the lower cavity and the upper cavity. A controller causes a main injection and at least one pilot injection to be executed when the engine operates in a first state and a second state in which the load is lower than the load in the first state. The fuel spray is distributed to the lower cavity and the upper cavity. The controller outputs a control signal to a fuel injection valve so that a distribution ratio for the upper cavity is higher when the engine operates in the second state than when in the first state.Type: ApplicationFiled: January 23, 2020Publication date: July 30, 2020Inventors: Naotoshi Shirahashi, Yasunori Uesugi, Takeshi Matsubara
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Publication number: 20200240351Abstract: In a compression-ignition engine having a two-stage cavity, the distribution ratio between fuel for an upper cavity and fuel for a lower cavity is maintained even when the operational state of the engine changes. A piston of the engine includes a lower cavity, an upper cavity, and a lip portion therebetween. A controller causes a main injection and at least one pilot injection to be executed when the engine operates in a first state and a second state in which the load is lower than the load in the first state. The fuel spray is distributed to the lower cavity and the upper cavity. The controller sets the timing of the pilot injection(s) so that the distribution ratio of the fuel spray of the pilot injection(s) for the lower cavity is higher when the engine operates in the first state than when in the second state.Type: ApplicationFiled: January 23, 2020Publication date: July 30, 2020Inventors: Naotoshi Shirahashi, Yasunori Uesugi, Takeshi Matsubara
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Publication number: 20200240354Abstract: In a compression-ignition engine having a two-stage cavity, the distribution ratio between fuel for an upper cavity and fuel for a lower cavity is maintained even when the operational state of the engine changes. A piston of the compression-ignition engine includes a lower cavity, an upper cavity, and a lip portion between the lower cavity and the upper cavity. A controller causes a main injection and at least one pilot injection to be executed when the engine operates in a first state and a second state in which the speed is higher than the speed in the first state. The fuel spray is distributed to the lower cavity and the upper cavity. The controller increases an injection amount per pilot injection when the engine operates in the second state than when the engine operates in the first state.Type: ApplicationFiled: January 23, 2020Publication date: July 30, 2020Inventors: Naotoshi Shirahashi, Yasunori Uesugi, Takeshi Matsubara
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Publication number: 20200240353Abstract: In a compression-ignition engine having a two-stage cavity, the distribution ratio between fuel for an upper cavity and fuel for a lower cavity is maintained even when the operational state of the engine changes. A piston of the engine includes a lower cavity, an upper cavity, and a lip portion between the lower cavity and the upper cavity. A controller causes a main injection and at least one pilot injection to be executed when an engine operates in a first state and a second state in which the speed is higher than the speed in the first state. The fuel spray is distributed to the lower cavity and the upper cavity. The controller maintains an injection amount of the main injection and increases an injection amount of the pilot injection(s) when the engine operates in the second state as compared to when the engine operates in the first state.Type: ApplicationFiled: January 23, 2020Publication date: July 30, 2020Inventors: Naotoshi Shirahashi, Yasunori Uesugi, Takeshi Matsubara
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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: 10473016Abstract: An exhaust purification device of an engine includes: an exhaust passage; a urea injector supplying urea water into the exhaust passage; a pump device which supplies urea water stored in a urea tank to the urea injector, the pump device capable of performing an operation of recovering the urea water supplied to the urea injector to the urea tank; an SCR catalyst which purifies the exhaust gas using urea; and a controller. The controller controls the pump device such that the supply of the urea water to the urea injector is stopped, and a recovery operation for recovering the urea water in the urea injector to the urea tank is performed in a case where an amount of ammonium adsorbed by the SCR catalyst is larger than a predetermined reference adsorption amount under a condition where an internal temperature of the urea injector reaches a predetermined high temperature.Type: GrantFiled: August 22, 2018Date of Patent: November 12, 2019Assignee: Mazda Motor CorporationInventors: Yohei Nakano, Yasunori Uesugi
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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: 20190093536Abstract: An exhaust purification device of an engine includes: an exhaust passage; a urea injector supplying urea water into the exhaust passage; a pump device which supplies urea water stored in a urea tank to the urea injector, the pump device capable of performing an operation of recovering the urea water supplied to the urea injector to the urea tank; an SCR catalyst which purifies the exhaust gas using urea; and a controller. The controller controls the pump device such that the supply of the urea water to the urea injector is stopped, and a recovery operation for recovering the urea water in the urea injector to the urea tank is performed in a case where an amount of ammonium adsorbed by the SCR catalyst is larger than a predetermined reference adsorption amount under a condition where an internal temperature of the urea injector reaches a predetermined high temperature.Type: ApplicationFiled: August 22, 2018Publication date: March 28, 2019Inventors: Yohei Nakano, 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: 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