Patents by Inventor Masanobu Takazawa
Masanobu Takazawa 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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Publication number: 20200224574Abstract: A heat accumulation and dissipation device (1) for an internal combustion engine (2) includes, in a cooling circuit (3) for circulating cooling water used to cool the internal combustion engine (2), a heat accumulator (7) for accumulating the cooling water, and an exhaust heat recovery device (9) for recovering the heat of exhaust gas through the cooling water, wherein when the internal combustion engine (2) is started, heat is dissipated by sending the cooling water of the heat accumulator (7) to the internal combustion engine (2). The cooling circuit (3) includes a heat accumulation and dissipation circuit (8) configured to perform heat accumulation and dissipation while circulating the cooling water between the internal combustion engine (2) and the heat accumulator (7), and the heat accumulator (9) is arranged upstream of the heat accumulator (7) of the heat accumulation and dissipation circuit (8).Type: ApplicationFiled: January 10, 2020Publication date: July 16, 2020Applicant: Honda Motor Co.,Ltd.Inventors: Masayuki TOYOKAWA, Hajime UTO, Masanobu TAKAZAWA, Naoaki TAKEDA, Takahiro OKADA
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Patent number: 10697352Abstract: A thermal management system of a vehicle includes: a cooling circuit in which cooling water circulates; a heat accumulator storing the cooling water; a flow control valve adjusting a flow rate of the cooling water flowing to the heat accumulator; a radiator; a thermostatic valve adjusting the flow rate of the cooling water flowing to the radiator; a grille shutter adjusting amount of outside air introduced from a front grille into an engine room; a cooling water temperature sensor; a heat radiation control unit supplying the cooling water to the cooling circuit to warm up an engine when the engine is cold; and a heat storage control unit, by controlling opening degrees of the flow control valve and the grille shutter according to a cooling water temperature, supplying from the cooling circuit to the heat accumulator the cooling water whose temperature is raised by heat of the engine.Type: GrantFiled: May 29, 2019Date of Patent: June 30, 2020Assignee: Honda Motor Co., Ltd.Inventors: Hajime Uto, Masanobu Takazawa, Masayuki Toyokawa, Naoaki Takeda
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Patent number: 10690065Abstract: A control device of a vehicle capable of improving acceleration responsiveness and suppressing increase in the NOx emission amount when a required torque is increased during a steady lean operation. A target air-fuel ratio (AFCMD) is set according to an accelerator pedal operation of a driver. When the driver depresses an accelerator pedal to make an acceleration request during the lean operation, in which the AFCMD is set to a predetermined lean air-fuel ratio (AFLN), air-fuel ratio reduction control is executed to reduce the AFCMD according to the acceleration request. In the air-fuel ratio reduction control, when the AFCMD calculated according to a required torque (TRQCMD) is smaller than a limit air-fuel ratio (AFLMT), the AFCMD is set to the AFLMT, and the AFLMT is set to a value smaller than the AFLN set in a steady state of the lean operation and larger than a theoretical air-fuel ratio (AFST).Type: GrantFiled: June 23, 2017Date of Patent: June 23, 2020Assignee: Honda Motor Co., Ltd.Inventors: Masahiro Takeuchi, Masaki Ueno, Hidekazu Hironobu, Masanobu Takazawa, Haruya Kitano
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Publication number: 20200003320Abstract: The thermal management system includes a cooling circuit in which cooling water circulates, a heat exchange circuit in which cooling water performing heat exchange with a battery flows, a flow rate control valve which adjusts a flow rate of cooling water flowing from the cooling circuit to the heat exchange circuit, a shutter which adjusts an introduction amount of outside air into an engine room, and an ECU which controls an opening degree of the flow rate control valve and an opening degree of the shutter. The ECU controls the shutter and the flow rate control valve to be in a fully closed state when a cooling water temperature is less than a valve opening temperature of a thermostat valve and controls the shutter and the flow rate control valve to be in an open state when the cooling water temperature is greater than the valve opening temperature.Type: ApplicationFiled: July 1, 2019Publication date: January 2, 2020Applicant: Honda Motor Co.,Ltd.Inventors: Hajime UTO, Masanobu TAKAZAWA, Masayuki TOYOKAWA, Naoaki TAKEDA
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Publication number: 20190383206Abstract: A thermal management system of a vehicle includes: a cooling circuit in which cooling water circulates; a heat accumulator storing the cooling water; a flow control valve adjusting a flow rate of the cooling water flowing to the heat accumulator; a radiator; a thermostatic valve adjusting the flow rate of the cooling water flowing to the radiator; a grille shutter adjusting amount of outside air introduced from a front grille into an engine room; a cooling water temperature sensor; a heat radiation control unit supplying the cooling water to the cooling circuit to warm up an engine when the engine is cold; and a heat storage control unit, by controlling opening degrees of the flow control valve and the grille shutter according to a cooling water temperature, supplying from the cooling circuit to the heat accumulator the cooling water whose temperature is raised by heat of the engine.Type: ApplicationFiled: May 29, 2019Publication date: December 19, 2019Applicant: Honda Motor Co.,Ltd.Inventors: Hajime UTO, Masanobu TAKAZAWA, Masayuki TOYOKAWA, Naoaki TAKEDA
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Patent number: 10495049Abstract: A control device for an internal combustion engine includes an air-fuel ratio controller to execute a stoichiometric operation in which an air-fuel ratio of an air-fuel mixture in a combustion chamber of the internal combustion engine is set to a stoichiometric air-fuel ratio and a lean operation in which the air-fuel ratio is set to an air-fuel ratio leaner than the stoichiometric air-fuel ratio. A ignition timing controller is to calculate at least one ignition timing control parameter based on a laminar combustion velocity and to control an ignition plug provided in the combustion chamber to ignite based on the at least one ignition timing control parameter in a transitional state between the stoichiometric operation and the lean operation.Type: GrantFiled: August 10, 2017Date of Patent: December 3, 2019Assignee: HONDA MOTOR CO., LTD.Inventors: Masanobu Takazawa, Hiroshi Hanabusa, Haruya Kitano
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Patent number: 10221805Abstract: A controller for an internal combustion engine includes a detector and a processor. The detector detects a combustion condition of a gas in a cylinder of the internal combustion engine. The processor is configured to calculate a fuel ratio in the gas in the cylinder. The processor is configured to calculate a target combustion condition according to the fuel ratio. The processor is configured to calculate an ignition timing such that the combustion condition detected by the detector becomes equal to the target combustion condition.Type: GrantFiled: May 18, 2017Date of Patent: March 5, 2019Assignee: HONDA MOTOR CO., LTD.Inventors: Mitsuhiro Iwadare, Masanobu Takazawa, Haruya Kitano
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Publication number: 20180094616Abstract: A control device for an internal combustion engine includes an air-fuel ratio controller to execute a stoichiometric operation in which an air-fuel ratio of an air-fuel mixture in a combustion chamber of the internal combustion engine is set to a stoichiometric air-fuel ratio and a lean operation in which the air-fuel ratio is set to an air-fuel ratio leaner than the stoichiometric air-fuel ratio. A ignition timing controller is to calculate at least one ignition timing control parameter based on a laminar combustion velocity and to control an ignition plug provided in the combustion chamber to ignite based on the at least one ignition timing control parameter in a transitional state between the stoichiometric operation and the lean operation.Type: ApplicationFiled: August 10, 2017Publication date: April 5, 2018Applicant: HONDA MOTOR CO., LTD.Inventors: Masanobu TAKAZAWA, Hiroshi HANABUSA, Haruya KITANO
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Publication number: 20180010534Abstract: A control device of a vehicle capable of improving acceleration responsiveness and suppressing increase in the NOx emission amount when a required torque is increased during a steady lean operation. A target air-fuel ratio (AFCMD) is set according to an accelerator pedal operation of a driver. When the driver depresses an accelerator pedal to make an acceleration request during the lean operation, in which the AFCMD is set to a predetermined lean air-fuel ratio (AFLN), air-fuel ratio reduction control is executed to reduce the AFCMD according to the acceleration request. In the air-fuel ratio reduction control, when the AFCMD calculated according to a required torque (TRQCMD) is smaller than a limit air-fuel ratio (AFLMT), the AFCMD is set to the AFLMT, and the AFLMT is set to a value smaller than the AFLN set in a steady state of the lean operation and larger than a theoretical air-fuel ratio (AFST).Type: ApplicationFiled: June 23, 2017Publication date: January 11, 2018Applicant: Honda Motor Co.,Ltd.Inventors: Masahiro TAKEUCHI, Masaki UENO, Hidekazu HIRONOBU, Masanobu TAKAZAWA, Haruya KITANO
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Publication number: 20170363037Abstract: A controller for an internal combustion engine includes a detector and a processor. The detector detects a combustion condition of a gas in a cylinder of the internal combustion engine. The processor is configured to calculate a fuel ratio in the gas in the cylinder. The processor is configured to calculate a target combustion condition according to the fuel ratio. The processor is configured to calculate an ignition timing such that the combustion condition detected by the detector becomes equal to the target combustion condition.Type: ApplicationFiled: May 18, 2017Publication date: December 21, 2017Applicant: HONDA MOTOR CO., LTD.Inventors: Mitsuhiro IWADARE, Masanobu TAKAZAWA, Haruya KITANO
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Publication number: 20100050992Abstract: In a variable stroke internal combustion engine, by determining the relationships of a connecting point (D) between a first link (4) and second link (5) and a connecting point (B) between the second link (5) and a control link (12) with respect to a center (A) of a crankpin (9) to be such that ?D<?B holds over an entire rotational angle of the crankshaft, where ?D is the distance between D and A and ?B is the distance between B and A, an adequate durability of the engine can be ensured without increasing the weight thereof.Type: ApplicationFiled: September 5, 2007Publication date: March 4, 2010Applicant: Honda Motor Co., Ltd.Inventors: Keitaro Nakanishi, Akinori Maezuru, Katsuya Minami, Koichi Ikoma, Yoshihiro Okada, Masakazu Kinoshita, Masanobu Takazawa