Patents by Inventor Yasunori MATOBA
Yasunori MATOBA 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: 11333066Abstract: An engine control device is provided, which includes a blowby gas passage connecting an engine body to an intake passage so that blowby gas leaked from a combustion chamber is recirculated to the intake passage, a boost pressure changer configured to change a boost pressure of a turbocharger, and a controller configured to set a target boost pressure and control the boost pressure changer. The turbocharger includes a turbine which is provided to an exhaust passage and driven by exhaust gas, and a compressor which is provided to the intake passage and rotary driven by the turbine to boost intake air. The blowby gas passage is connected to the intake passage near the compressor. The controller corrects the target boost pressure when an ambient temperature is below a given determination temperature, to be higher than the target boost pressure when the ambient temperature is at or above the determination temperature.Type: GrantFiled: September 2, 2021Date of Patent: May 17, 2022Assignee: Mazda Motor CorporationInventors: Yasunori Matoba, Takafumi Nishio, Satoshi Watanabe
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Publication number: 20220136468Abstract: A device is provided, which controls a vehicle-mounted engine provided with an engine body with a plurality of cylinders, a plurality of independent intake passages, each connected to the engine body so as to communicate with a combustion chamber of each cylinder via an intake port, and a surge tank connected to an upstream end of each independent intake passage. The device includes a phase changer, an ambient temperature sensor, and a controller configured to acquire an amount of condensate water existing in the surge tank. When the engine is stopped in a situation where the ambient temperature is lower than a given reference temperature and the condensate water amount is above a given reference amount, the controller controls the phase changer so that a lift amount of an intake valve in each cylinder of the stopped engine becomes outside a given minute lift range.Type: ApplicationFiled: October 26, 2021Publication date: May 5, 2022Inventors: Yasunori Matoba, Hiroyuki Morioka
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Publication number: 20220120212Abstract: An engine control device is provided, which includes a blowby gas passage connecting an engine body to an intake passage so that blowby gas leaked from a combustion chamber is recirculated to the intake passage, a boost pressure changer configured to change a boost pressure of a turbocharger, and a controller configured to set a target boost pressure and control the boost pressure changer. The turbocharger includes a turbine which is provided to an exhaust passage and driven by exhaust gas, and a compressor which is provided to the intake passage and rotary driven by the turbine to boost intake air. The blowby gas passage is connected to the intake passage near the compressor. The controller corrects the target boost pressure when an ambient temperature is below a given determination temperature, to be higher than the target boost pressure when the ambient temperature is at or above the determination temperature.Type: ApplicationFiled: September 2, 2021Publication date: April 21, 2022Inventors: Yasunori Matoba, Takafumi Nishio, Satoshi Watanabe
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Patent number: 10801424Abstract: A supercharging device for an engine is provided, which includes a supercharger provided to an intake passage of the engine, an actuator configured to drive the supercharger, and a controller including a processor configured to control the actuator to drive the supercharger when an operating state of the engine is in a given supercharging range, and to stop the supercharger when the operating state is in a non-supercharging range. The controller estimates an amount of condensate accumulated in an oil pan, and the controller causes the actuator to forcibly drive the supercharger when the estimated amount of condensate is more than a preset amount, even if the operating state is in the non-supercharging range.Type: GrantFiled: February 21, 2019Date of Patent: October 13, 2020Assignee: Mazda Motor CorporationInventors: Yasunori Matoba, Takaya Okugawa, Yuki Hikichi
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Patent number: 10801423Abstract: A supercharging device for an engine is provided, which includes a supercharger provided to an intake passage of the engine, an actuator configured to drive the supercharger, and a controller including a processor configured to control the actuator to drive the supercharger when an operating state of the engine is in a given supercharging range, and to stop the supercharger when the operating state is in a non-supercharging range. The controller causes the actuator to forcibly drive the supercharger in the non-supercharging range when a temperature of the supercharger is lower than a preset temperature, and prohibits the forcible drive of the supercharger when a rotation speed of the supercharger during the forcible drive of the supercharger is lower than a preset rotation speed.Type: GrantFiled: February 20, 2019Date of Patent: October 13, 2020Assignee: Mazda Motor CorporationInventors: Yasunori Matoba, Hiroyuki Morioka, Takayoshi Miyachi
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Publication number: 20190277207Abstract: A supercharging device for an engine is provided, which includes a supercharger provided to an intake passage of the engine, an actuator configured to drive the supercharger, and a controller including a processor configured to control the actuator to drive the supercharger when an operating state of the engine is in a given supercharging range, and to stop the supercharger when the operating state is in a non-supercharging range. The controller causes the actuator to forcibly drive the supercharger in the non-supercharging range when a temperature of the supercharger is lower than a preset temperature, and prohibits the forcible drive of the supercharger when a rotation speed of the supercharger during the forcible drive of the supercharger is lower than a preset rotation speed.Type: ApplicationFiled: February 20, 2019Publication date: September 12, 2019Inventors: Yasunori Matoba, Hiroyuki Morioka, Takayoshi Miyachi
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Publication number: 20190277208Abstract: A supercharging device for an engine is provided, which includes a supercharger provided to an intake passage of the engine, an actuator configured to drive the supercharger, and a controller including a processor configured to control the actuator to drive the supercharger when an operating state of the engine is in a given supercharging range, and to stop the supercharger when the operating state is in a non-supercharging range. The controller estimates an amount of condensate accumulated in an oil pan, and the controller causes the actuator to forcibly drive the supercharger when the estimated amount of condensate is more than a preset amount, even if the operating state is in the non-supercharging range.Type: ApplicationFiled: February 21, 2019Publication date: September 12, 2019Inventors: Yasunori Matoba, Takaya Okugawa, Yuki Hikichi
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Patent number: 9970361Abstract: In response to a switching demand from an all-cylinder operation to a reduced-cylinder operation, the amount of air to be taken into each of cylinders 2A to 2D is made larger than the amount of air during the all-cylinder operation in a normal state. Preparatory control of changing the ignition timing of ignition device to a timing on the retard side with respect to the ignition timing during the all-cylinder operation in the normal state is executed. After termination of the preparatory control, the reduced-cylinder operation is started. During execution of the preparatory control, the valve closing timing of an exhaust valve 9 is changed to a timing on the advance side with respect to the valve closing timing thereof during the all-cylinder operation in the normal state so as to reduce the amount of internal EGR gas in at least a part of an operating range C.Type: GrantFiled: August 6, 2015Date of Patent: May 15, 2018Assignee: MAZDA MOTOR CORPORATIONInventors: Yukio Haizaki, Naohiro Yamaguchi, Kazutoyo Watanabe, Yasunori Matoba
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Publication number: 20160215705Abstract: In response to a switching demand from an all-cylinder operation to a reduced-cylinder operation, the amount of air to be taken into each of cylinders 2A to 2D is made larger than the amount of air during the ail-cylinder operation in a normal state. Preparatory control of changing the ignition timing of ignition device to a timing on the retard side with respect to the ignition timing during the all-cylinder operation in the normal state is executed. After termination of the preparatory control, the reduced-cylinder operation is started. During execution of the preparatory control, the valve closing timing of an exhaust valve 9 is changed to a timing on the advance side with respect to the valve closing timing thereof during the all-cylinder operation in the normal state so as to reduce the amount of internal EGR gas in at least a part of an operating range C.Type: ApplicationFiled: August 6, 2015Publication date: July 28, 2016Applicant: MAZDA MOTOR CORPORATIONInventors: Yukio HAIZAKI, Naohiro YAMAGUCHI, Kazutoyo WATANABE, Yasunori MATOBA