Patents by Inventor Yuusuke Kihara
Yuusuke Kihara 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: 20230250767Abstract: An object of the present invention is to obtain a controller device for a variable valve timing apparatus capable of controlling a phase to an arbitrary fixed valve timing from immediately before an internal combustion engine stops until after the internal combustion engine has stopped. The controller device for the variable valve timing apparatus according to the present invention performs, during engine stop processing of the internal combustion engine, normal control of changing the relative rotational phase of a camshaft to a most advanced position or a most retarded position when the rotational speed of a crankshaft is equal to or more than a first threshold, and low-speed control of fixing a current or a voltage supplied to the motor to be constant to maintain the relative rotational phase of the camshaft at the most advanced position or the most retarded position in a period from when the rotational speed of the crankshaft is lower than the first threshold until the rotational speed becomes zero.Type: ApplicationFiled: June 23, 2021Publication date: August 10, 2023Inventors: Yuta KOIKE, Masayuki SARUWATARI, Yuusuke KIHARA, Akihiro KOMORI
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Publication number: 20190145305Abstract: An object of the invention is to form a highly homogeneous air-fuel mixture which is not influenced by an engine rotation speed. Therefore, the invention provides a fuel injection control device including a cylinder, a first injector disposed at an upper portion of the cylinder in the axial direction and a center portion thereof in the radial direction, an intake valve disposed at an upper portion of the cylinder in the axial direction and an outer portion thereof in the radial direction in relation to the first fuel injection device, and a second injector supplying fuel from an upper portion of the cylinder in the axial direction and at least an outer portion in the radial direction in relation to the intake valve, in which a rotation speed of the engine is high, a fuel supply amount ratio of the first injector with respect to the second injector is controlled to be larger than that of a case where the rotation speed is low.Type: ApplicationFiled: July 29, 2016Publication date: May 16, 2019Inventors: Yuusuke KIHARA, Yoshihiro SUKEGAWA, Kazuhiro ORYOJI, Kenichiro OGATA, Minoru OOSUGA, Masayuki SARUWATARI
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Publication number: 20190107041Abstract: Stratified air-fuel mixture is stably formed around an ignition plug during a stratified charge combustion operation. For this reason, to solve the above problem, the present invention provides an internal combustion engine control device for controlling an internal combustion engine. The internal combustion engine includes: a fluid injection valve provided along an axial direction of an ignition plug; and a fuel injection valve formed separately from the fluid injection valve and provided in a direction intersecting with the axial direction of the fluid injection valve, and the internal combustion engine control device includes a control unit which controls the fluid injection valve and the fuel injection valve so as to inject fluid from the fuel injection valve after injecting fluid from the fluid injection valve in a compression stroke.Type: ApplicationFiled: March 22, 2017Publication date: April 11, 2019Inventors: Yoshihiro SUKEGAWA, Yuusuke KIHARA
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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: 7089913Abstract: A control apparatus operates a compression ignition internal combustion engine by switching between spark ignition combustion using an ignition device and compression ignition combustion which self-ignites a mixture by piston compression. Variable valve mechanisms vary at least one of the valve timings and valve lifts of an intake valve and an exhaust valve. Intake air is regulated to vary the amount of air intake into a combustion chamber on the upstream side of a combustion chamber inlet of the compression ignition internal combustion engine. The variable valve mechanisms and the intake air regulation are controlled during the compression ignition combustion so as to perform the compression ignition combustion.Type: GrantFiled: April 20, 2004Date of Patent: August 15, 2006Assignee: Hitachi, Ltd.Inventors: Shiro Yamaoka, Toshiharu Nogi, Minoru Oosuga, Takuya Shiraishi, Shinji Nakagawa, Yuusuke Kihara
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Patent number: 7055495Abstract: A compression ignition internal combustion engine includes a combustion chamber, an intake valve 19a, intake port 6, and an exhaust valve 19b. The temperature and pressure in the combustion chamber are increased to self-ignite an air-fuel mixture with the compressive operation of a piston after closing of the intake valve 19a. A fuel injection valve 11 injects pressurized air, serving as an ignition trigger factor, directly into the combustion chamber so that the air-fuel mixture under the expansion stroke of the piston is brought into an ignitable state. An ECU 1 controls the injection timing of the pressurized air depending on the ignition timing. The self-ignition timing can be controlled to a proper timing in a wide engine operating range with respect to a load and a revolution speed without changing the shape of the combustion chamber to a large extent.Type: GrantFiled: March 31, 2004Date of Patent: June 6, 2006Assignee: Hitachi, Ltd.Inventors: Shiro Yamaoka, Minoru Oosuga, Toshiharu Nogi, Takuya Shiraishi, Yuusuke Kihara
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Patent number: 6966295Abstract: A compression ignition internal combustion engine in which the temperature and pressure in the combustion chamber are increased to self-ignite an air-fuel mixture with the compressive operation of a piston after closing of the intake valve. An ECU [1] controls injection timing of the pressurized air depending on the ignition timing. Self-ignition timing can be controlled to a proper timing in a wide engine operating range with respect to a load and a revolution speed without substantially changing the shape of the combustion chamber.Type: GrantFiled: May 22, 2001Date of Patent: November 22, 2005Assignee: Hitachi, Ltd.Inventors: Shiro Yamaoka, Minoru Oosuga, Toshiharu Nogi, Takuya Shiraishi, Yuusuke Kihara
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Publication number: 20040194746Abstract: It is an object of the present invention to provide a compression ignition internal combustion engine capable of making compatible an increase in compression self-ignition operating area with an optimum output torque control in the operating area and also smoothly switching between a self-ignition combustion and a spark ignition combustion. The compression ignition internal combustion engine operates by switching between the spark ignition combustion using an ignition device and the compression ignition combustion which self-ignites a mixture by piston compression. Variable valve mechanisms vary at least one of the valve timings and valve lifts of an intake valve and an exhaust valve. Intake air is regulated to vary the amount of air intake into a combustion chamber on the upstream side of a combustion chamber inlet of the compression ignition internal combustion engine.Type: ApplicationFiled: April 20, 2004Publication date: October 7, 2004Applicant: Hitachi, Ltd.Inventors: Shiro Yamaoka, Toshiharu Nogi, Minoru Oosuga, Takuya Shiraishi, Shinji Nakagawa, Yuusuke Kihara
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Publication number: 20040177830Abstract: A compression ignition internal combustion engine comprises a combustion chamber 16 to which air and fuel are supplied, an intake valve 19a for opening and closing a passage between the combustion chamber and an intake port 6 communicating with the combustion chamber, and an exhaust valve 19b for opening and closing a passage between the combustion chamber and an exhaust port 14 communicating with the combustion chamber. The temperature and pressure in the combustion chamber are increased to self-ignite an air-fuel mixture with the compressive operation of a piston after closing of the intake valve 19a. A fuel injection valve 11 injects pressurized air, serving as an ignition trigger factor, directly into the combustion chamber so that the air-fuel mixture under the expansion stroke of the piston is brought into an ignitable state. An ECU 1 controls the injection timing of the pressurized air depending on the ignition timing.Type: ApplicationFiled: March 31, 2004Publication date: September 16, 2004Applicant: Hitachi, Ltd.Inventors: Shiro Yamaoka, Minoru Oosuga, Toshiharu Nogi, Takuya Shiraishi, Yuusuke Kihara
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Publication number: 20040154581Abstract: A compression ignition internal combustion engine comprises a combustion chamber 16 to which air and fuel are supplied, an intake valve 19a for opening and closing a passage between the combustion chamber and an intake port 6 communicating with the combustion chamber, and an exhaust valve 19b for opening and closing a passage between the combustion chamber and an exhaust port 14 communicating with the combustion chamber. The temperature and pressure in the combustion chamber are increased to self-ignite an air-fuel mixture with the compressive operation of a piston after closing of the intake valve 19a. A fuel injection valve 11 injects pressurized air, serving as an ignition trigger factor, directly into the combustion chamber so that the air-fuel mixture under the expansion stroke of the piston is brought into an ignitable state. An ECU 1 controls the injection timing of the pressurized air depending on the ignition timing.Type: ApplicationFiled: November 21, 2003Publication date: August 12, 2004Inventors: Shiro Yamaoka, Minoru Oosuga, Toshiharu Nogi, Takuya Shiraishi, Yuusuke Kihara
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Patent number: 6739295Abstract: It is an object of the present invention to provide a compression ignition internal combustion engine capable of making compatible an increase in compression self-ignition operating area with an optimum output torque control in the operating area and also smoothly switching between a self-ignition combustion and a spark ignition combustion. The compression ignition internal combustion engine operates by switching between the spark ignition combustion using an ignition device and the compression ignition combustion which self-ignites a mixture by piston compression. Variable valve mechanisms vary at least one of the valve timings and valve lifts of an intake valve and an exhaust valve. Intake air is regulated to vary the amount of air intake into a combustion chamber on the upstream side of a combustion chamber inlet of the compression ignition internal combustion engine.Type: GrantFiled: December 31, 2002Date of Patent: May 25, 2004Assignee: Hitachi, Ltd.Inventors: Shiro Yamaoka, Toshiharu Nogi, Minoru Oosuga, Takuya Shiraishi, Shinji Nakagawa, Yuusuke Kihara
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Publication number: 20030226528Abstract: It is an object of the present invention to provide a compression ignition internal combustion engine capable of making compatible an increase in compression self-ignition operating area with an optimum output torque control in the operating area and also smoothly switching between a self-ignition combustion and a spark ignition combustion. The compression ignition internal combustion engine operates by switching between the spark ignition combustion using an ignition device and the compression ignition combustion which self-ignites a mixture by piston compression. Variable valve mechanisms (15a, 15b) vary at least one of the valve timings and valve lifts of an intake valve and an exhaust valve. Intake air regulating means (7; 30; 32; 40, 42) vary the amount of air intake into a combustion chamber on the upstream side of a combustion chamber inlet of the compression ignition internal combustion engine.Type: ApplicationFiled: March 20, 2003Publication date: December 11, 2003Applicant: Hitachi, Ltd.Inventors: Shiro Yamaoka, Toshiharu Nogi, Minoru Oosuga, Takuya Shiraishi, Shinji Nakagawa, Yuusuke Kihara