Patents by Inventor Tomoharu Hozumi
Tomoharu Hozumi 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: 10760511Abstract: An apparatus, method, and system for controlling an idle speed of an internal combustion engine during certain vehicle component operations to minimize unwanted motion and vibration. A transmission neutral engagement, a transmission forward or reverse gear engagement, and a vehicle speed are detected. An engine target idle speed is set to a first speed during the neutral engagement. An engine target idle speed is set to a second idle speed when a vehicle speed is less than a threshold speed and the forward or reverse gear is activated. The vehicle target idle speed is set to a third idle speed when the vehicle speed is greater than a threshold speed while the forward or reverse gear is activated, wherein the first target idle speed, second target idle speed and third target idle speed are different engine speeds.Type: GrantFiled: June 15, 2018Date of Patent: September 1, 2020Assignee: HONDA MOTOR CO., LTD.Inventors: Thomas J. Markman, Tomoharu Hozumi, Joaquin A. Pelaez, Andrew G. Shapiro
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Patent number: 10724459Abstract: An apparatus, method, and system for controlling the torque of an internal combustion engine during certain vehicle component operations to minimize unwanted motion and vibration. The method includes detecting at least one of reverse gear engagement or reverse movement of the vehicle; wherein a feedback control of the internal combustion engine is switched from open-loop control to closed-loop control upon detection of at least one of a reverse gear activation or reverse movement of the vehicle.Type: GrantFiled: June 12, 2018Date of Patent: July 28, 2020Assignee: HONDA MOTOR CO., LTD.Inventors: Thomas J. Markman, Tomoharu Hozumi, Joaquin A. Pelaez, Andrew G. Shapiro
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Publication number: 20190383226Abstract: An apparatus, method, and system for controlling an idle speed of an internal combustion engine during certain vehicle component operations to minimize unwanted motion and vibration. A transmission neutral engagement, a transmission forward or reverse gear engagement, and a vehicle speed are detected. An engine target idle speed is set to a first speed during the neutral engagement. An engine target idle speed is set to a second idle speed when a vehicle speed is less than a threshold speed and the forward or reverse gear is activated. The vehicle target idle speed is set a third idle speed when the vehicle speed is greater than a threshold speed while the forward or reverse gear is activated, wherein the first target idle speed, second target idle speed and third target idle speed are different engine speeds.Type: ApplicationFiled: June 15, 2018Publication date: December 19, 2019Inventors: Thomas J. MARKMAN, Tomoharu HOZUMI, Joaquin A. PELAEZ, Andrew G. SHAPIRO
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Publication number: 20190376462Abstract: An apparatus, method, and system for controlling the torque of an internal combustion engine during certain vehicle component operations to minimize unwanted motion and vibration.Type: ApplicationFiled: June 12, 2018Publication date: December 12, 2019Inventors: Thomas J. MARKMAN, Tomoharu HOZUMI, Joaquin A. PELAEZ, Andrew G. SHAPIRO
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Patent number: 9857273Abstract: A misfire detecting apparatus is provided wherein a misfire is detected based on a rotational speed parameter indicative of a rotational speed of an internal combustion engine. An average change amount of the rotational speed parameter in a first predetermined period and an inertia speed changing component which is generated with rotation of the engine are calculated, and a first corrected rotational speed parameter is calculated by correcting the rotational speed parameter according to the average change amount and the inertia speed changing component.Type: GrantFiled: November 19, 2010Date of Patent: January 2, 2018Assignee: HONDA MOTOR CO., LTD.Inventors: Tomoharu Hozumi, Masaaki Nagashima, Kiyonari Matsuda
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Patent number: 8935074Abstract: An apparatus to control an internal combustion engine includes a cylinder operation controller configured to switch a cylinder operation between an all-cylinder operation and a cylinder deactivation operation. A deactivation time parameter integrating device is configured to integrate a deactivation time parameter indicating a deactivation time of the part of the plurality of cylinders to calculate an integrated deactivation time parameter. An inhibiting device is configured to inhibit the cylinder deactivation operation if the integrated deactivation time parameter calculated by the deactivation time parameter integrating device is larger than or equal to a reference value. The deactivation time parameter integrating device holds the integrated deactivation time parameter as an initial value after an operation of the internal combustion engine is stopped.Type: GrantFiled: May 9, 2011Date of Patent: January 13, 2015Assignee: Honda Motor Co., Ltd.Inventors: Kazuhiko Imamura, Masaaki Nagashima, Hiroshi Yatani, Tomoharu Hozumi, Nobuaki Ito, Chiharu Shimizu
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Patent number: 8838368Abstract: A control device for stopping an engine, configured in such a manner that, when, after the ignition of the engine is turned off, the throttle valve is opened to introduce air in order to avoid that a piston stops near the top dead center, the control device stops the engine without causing a misalignment of the stop position of the piston and without degrading emission quality.Type: GrantFiled: December 1, 2009Date of Patent: September 16, 2014Assignee: Honda Motor Co., Ltd.Inventors: Atsushi Mitsui, Michiaki Karube, Tomoharu Hozumi
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Patent number: 8812221Abstract: A stop control system for an internal combustion engine, which is capable of accurately stopping a piston at a predetermined position during stoppage of the engine while preventing occurrence of untoward noise and vibration. After stopping the engine 3, the stop control system 1 for the engine 3 according to the present invention executes a first stage control (step 34) in which a throttle valve 13a is controlled to a first stage control target opening degree ICMDOFPRE smaller than a second predetermined opening degree ICMDOF2, in order to stop the piston at the predetermined position, before executing a second stage control (step 42) in which the throttle valve 13a is controlled to the second predetermined opening degree ICMDOF2.Type: GrantFiled: July 30, 2010Date of Patent: August 19, 2014Assignee: Honda Motor Co., Ltd.Inventors: Tomoharu Hozumi, Atsushi Mitsui, Takeshi Aoki, Hiroshi Yatani, Kazuhiko Imamura
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Patent number: 8589056Abstract: To provide a stop control system for an internal combustion engine, which is capable of accurately stopping a piston at a predetermined position while compensating for variation in the stop characteristic of the piston and aging thereof. The stop control system 1 for the engine 3 according the present invention controls a throttle valve 13a toward an open side when an engine speed NE becomes lower than a stop control start rotational speed NEIGOFTH after the engine 3 is stopped (step 42), whereby a final compression stroke rotational speed NEPRSFTGT is controlled to a predetermined reference value NENPFLMTO, to thereby control the stop position of the piston 3d to a predetermined position. Further, the correlation between the stop control start rotational speed NEIGOFTH and the final compression stroke rotational speed NEPRSFTGT is determined (step 5, FIG.Type: GrantFiled: July 30, 2010Date of Patent: November 19, 2013Assignee: Honda Motor Co., Ltd.Inventors: Tomoharu Hozumi, Hiroshi Yatani, Takeshi Aoki, Atsushi Mitsui, Masaaki Nagashima, Kazuhiko Imamura
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Publication number: 20120239311Abstract: A misfire detecting apparatus is provided wherein a misfire is detected based on a rotational speed parameter indicative of a rotational speed of an internal combustion engine. An average change amount of the rotational speed parameter in a first predetermined period and an inertia speed changing component which is generated with rotation of the engine are calculated, and a first corrected rotational speed parameter is calculated by correcting the rotational speed parameter according to the average change amount and the inertia speed changing component.Type: ApplicationFiled: November 19, 2010Publication date: September 20, 2012Applicant: HONDA MOTOR CO., LTD.Inventors: Tomoharu Hozumi, Masaaki Nagashima, Kiyonari Matsuda
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Publication number: 20120130619Abstract: A stop control system for an internal combustion engine, which is capable of accurately stopping a piston at a predetermined position during stoppage of the engine while preventing occurrence of untoward noise and vibration. After stopping the engine 3, the stop control system 1 for the engine 3 according to the present invention executes a first stage control (step 34) in which a throttle valve 13a is controlled to a first stage control target opening degree ICMDOFPRE smaller than a second predetermined opening degree ICMDOF2, in order to stop the piston at the predetermined position, before executing a second stage control (step 42) in which the throttle valve 13a is controlled to the second predetermined opening degree ICMDOF2.Type: ApplicationFiled: July 30, 2010Publication date: May 24, 2012Applicant: Honda Motor Co., Ltd.Inventors: Tomoharu Hozumi, Atsushi Mitsui, Takeshi Aoki, Hiroshi Yatani, Kazuhiko Imamura
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Publication number: 20120116653Abstract: To provide a stop control system for an internal combustion engine, which is capable of accurately stopping a piston at a predetermined position while compensating for variation in the stop characteristic of the piston and aging thereof. The stop control system 1 for the engine 3 according the present invention controls a throttle valve 13a toward an open side when an engine speed NE becomes lower than a stop control start rotational speed NEIGOFTH after the engine 3 is stopped (step 42), whereby a final compression stroke rotational speed NEPRSFTGT is controlled to a predetermined reference value NENPFLMTO, to thereby control the stop position of the piston 3d to a predetermined position. Further, the correlation between the stop control start rotational speed NEIGOFTH and the final compression stroke rotational speed NEPRSFTGT is determined (step 5, FIG.Type: ApplicationFiled: July 30, 2010Publication date: May 10, 2012Applicant: Honda Motor Co., Ltd.Inventors: Tomoharu Hozumi, Hiroshi Yatani, Takeshi Aoki, Atsushi Mitsui, Masaaki Nagashima, Kazuhiko Imamura
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Publication number: 20110307158Abstract: An apparatus to control an internal combustion engine includes a cylinder operation controller configured to switch a cylinder operation between an all-cylinder operation and a cylinder deactivation operation. A deactivation time parameter integrating device is configured to integrate a deactivation time parameter indicating a deactivation time of the part of the plurality of cylinders to calculate an integrated deactivation time parameter. An inhibiting device is configured to inhibit the cylinder deactivation operation if the integrated deactivation time parameter calculated by the deactivation time parameter integrating device is larger than or equal to a reference value. The deactivation time parameter integrating device holds the integrated deactivation time parameter as an initial value after an operation of the internal combustion engine is stopped.Type: ApplicationFiled: May 9, 2011Publication date: December 15, 2011Applicant: HONDA MOTOR CO., LTD.Inventors: Kazuhiko IMAMURA, Masaaki Nagashima, Hiroshi Yatani, Tomoharu Hozumi, Nobuaki Ito, Chiharu Shimizu
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Publication number: 20110288753Abstract: A control device for stopping an engine, configured in such a manner that, when, after the ignition of the engine is turned off, the throttle valve is opened to introduce air in order to avoid that a piston stops near the top dead center, the control device stops the engine without causing a misalignment of the stop position of the piston and without degrading emission quality.Type: ApplicationFiled: December 1, 2009Publication date: November 24, 2011Applicant: HONDA MOTOR CO., LTD.Inventors: Atsushi Mitsui, Michiaki Karube, Tomoharu Hozumi