Patents by Inventor Kenta Kotsuji
Kenta Kotsuji 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: 8091525Abstract: A rocker arm supported by a support portion of an engine and to be driven by a cam includes a sheet-metal rocker arm body manufactured by plastic working and including a cam follower, a fulcrum portion manufactured by cutting and including a through hole supplying lubricant, and a lubricant discharging hole. The cam follower includes a first slide-contact surface being in sliding contact with the cam. The lubricant discharging hole is defined by an outer surface of the fulcrum portion and an outer surface of the sheet-metal rocker arm body and in communication with the through hole. The lubricant discharging hole biases the lubricant supplied from the through hole in a direction toward the first slide-contact surface.Type: GrantFiled: July 8, 2009Date of Patent: January 10, 2012Assignees: Otics Corporation, Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Shizuo Ishikawa, Morihiro Yamamoto, Akira Yoshihara, Kenta Kotsuji
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Patent number: 7918201Abstract: A variable valve mechanism for an engine includes: a rocker shaft; a first rocker arm rotatably supported by the rocker shaft, for transmitting displacement of a first cam to a valve; a second rocker arm rotatably supported by the rocker shaft, for transmitting a displacement of a second cam to the valve; and a switching mechanism for switching a transmitting state and a non-transmitting state. The first rocker arm has a pair of first arm portions and a recess portion in which an upper end of the valve is inserted at an end portion of each of the first arm portions. The second rocker arm has a second arm portion disposed between the first arm portions. The first rocker arm is restricted from movement in an axis direction of the rocker shaft when an inner sidewall of the recess portion is in contact with the upper end of the valve. The second rocker arm is restricted from movement in the axis direction when the second arm portion is in contact with the first rocker arm.Type: GrantFiled: December 24, 2008Date of Patent: April 5, 2011Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Akira Yoshihara, Yuichi Takahashi, Kenta Kotsuji, Yasunori Kutsuna, Akira Ohta, Satoru Ishii
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Publication number: 20100006047Abstract: A rocker arm supported by a support portion of an engine and to be driven by a cam includes a sheet-metal rocker arm body manufactured by plastic working and including a cam follower, a fulcrum portion manufactured by cutting and including a through hole supplying lubricant, and a lubricant discharging hole. The cam follower includes a first slide-contact surface being in sliding contact with the cam. The lubricant discharging hole is defined by an outer surface of the fulcrum portion and an outer surface of the sheet-metal rocker arm body and in communication with the through hole. The lubricant discharging hole biases the lubricant supplied from the through hole in a direction toward the first slide-contact surface.Type: ApplicationFiled: July 8, 2009Publication date: January 14, 2010Inventors: Shizuo ISHIKAWA, Morihiro Yamamoto, Akira Yoshihara, Kenta Kotsuji
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Publication number: 20090229549Abstract: A variable valve mechanism for an engine includes: a rocker shaft; a first rocker arm rotatably supported by the rocker shaft, for transmitting displacement of a first cam to a valve; a second rocker arm rotatably supported by the rocker shaft, for transmitting a displacement of a second cam to the valve; and a switching mechanism for switching a transmitting state and a non-transmitting state. The first rocker arm has a pair of first arm portions and a recess portion in which an upper end of the valve is inserted at an end portion of each of the first arm portions. The second rocker arm has a second arm portion disposed between the first arm portions. The first rocker arm is restricted from movement in an axis direction of the rocker shaft when an inner sidewall of the recess portion is in contact with the upper end of the valve. The second rocker arm is restricted from movement in the axis direction when the second arm portion is in contact with the first rocker arm.Type: ApplicationFiled: December 24, 2008Publication date: September 17, 2009Inventors: Akira YOSHIHARA, Yuichi Takahashi, Kenta Kotsuji, Yasunori Kutsuna, Akira Ohta, Satoru Ishii
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Patent number: 7444967Abstract: A variable valve device includes a camshaft which is rotatably provided in an internal combustion engine while having a cam, a rocker shaft which is arranged next to the camshaft, a valve which is driven by the cam, a cam follower rocker which is rotatably provided in the rocker shaft, and is rocked by following the cam, a valve drive rocker which is rotatably provided in the rocker shaft next to the cam follower rocker, and drives the valve, and a switching portion which be able to switch the valve drive rocker between a drive state and a non-drive state. Either a body of the cam follower rocker or a body of the valve drive rocker is made of an iron-based metal material, and the other body is made of a material different from the iron-based metal material, heat treatment being not required in the different material.Type: GrantFiled: March 16, 2007Date of Patent: November 4, 2008Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Yusuke Kido, Shinichi Murata, Masaru Mori, Kenta Kotsuji
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Patent number: 7441523Abstract: A variable valve device for an internal combustion engine includes an internal combustion engine body having a plurality of cylinders, a variable valve mechanism which is provided in the body and is switchable between at least two modes with oil pressure, a mode switching oil control valve which switches the variable valve mechanism to each mode, and a camshaft-driven mode switching oil pump which supplies an oil pressure for switching driving to the variable valve mechanism according to the switching of the mode switching oil control valve. The mode switching oil control valve is, along with the mode switching oil pump, provided in an outer wall surface of the body.Type: GrantFiled: March 27, 2007Date of Patent: October 28, 2008Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Yusuke Kido, Shinichi Murata, Masaru Mori, Kenta Kotsuji
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Publication number: 20070227480Abstract: A variable valve device for an internal combustion engine includes an internal combustion engine body having a plurality of cylinders, a variable valve mechanism which is provided in the body and is switchable between at least two modes with oil pressure, a mode switching oil control valve which switches the variable valve mechanism to each mode, and a camshaft-driven mode switching oil pump which supplies an oil pressure for switching driving to the variable valve mechanism according to the switching of the mode switching oil control valve. The mode switching oil control valve is, along with the mode switching oil pump, provided in an outer wall surface of the body.Type: ApplicationFiled: March 27, 2007Publication date: October 4, 2007Inventors: Yusuke Kido, Shinichi Murata, Masaru Mori, Kenta Kotsuji
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Publication number: 20070215082Abstract: A variable valve device includes a camshaft which is rotatably provided in an internal combustion engine while having a cam, a rocker shaft which is arranged next to the camshaft, a valve which is driven by the cam, a cam follower rocker which is rotatably provided in the rocker shaft, and is rocked by following the cam, a valve drive rocker which is rotatably provided in the rocker shaft next to the cam follower rocker, and drives the valve, and a switching portion which be able to switch the valve drive rocker between a drive state and a non-drive state. Either a body of the cam follower rocker or a body of the valve drive rocker is made of an iron-based metal material, and the other body is made of a material different from the iron-based metal material, heat treatment being not required in the different material.Type: ApplicationFiled: March 16, 2007Publication date: September 20, 2007Inventors: Yusuke Kido, Shinichi Murata, Masaru Mori, Kenta Kotsuji