Patents by Inventor Mitsugu Nakamura
Mitsugu Nakamura 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: 20220349655Abstract: A heat exchanger includes tubes arranged side by side, and a tank connected to ends of the tubes. The heat exchanger performs heat exchange between a first fluid flowing inside the tubes and a second fluid flowing outside the tubes. The heat exchanger includes a closing member disposed inside the tank and partially closing an opening provided at an end of a predetermined tube that is at least one of the tubes. The predetermined tube has a protrusion formed at the end of the predetermined tube. The closing member has an avoiding structure that avoids interference between the protrusion and the closing member.Type: ApplicationFiled: July 18, 2022Publication date: November 3, 2022Inventors: Shota CHATANI, Hiroshi HAMADA, Mitsugu NAKAMURA, Tomohiko NAKAMURA, Ichio KAMEI
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Patent number: 9915481Abstract: A fin for a heat exchanger is joined to an outer surface of a tube, and facilitates a heat exchange between the tube and an air flowing around the tube. A sectional surface of the fin perpendicular to a flowing direction of an air has a corrugated shape that includes multiple flat portions substantially parallel to a flowing direction of the air, and a ridge portion connecting the adjacent flat portions. Multiple louvers cut in and raised from each of the flat portions at a predetermined cut-and-raised angle are disposed on the flat portion along a flowing direction of the air. A thickness of each flat portion is defined as t, a louver pitch of the louvers is defined as PL, and the thickness of each flat portion and the louver pitch satisfy a relationship of 0.035?t/PL?0.29.Type: GrantFiled: July 7, 2014Date of Patent: March 13, 2018Assignee: DENSO CORPORATIONInventors: Mitsugu Nakamura, Masahiro Shimoya, Tadashi Nakabou
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Publication number: 20160153727Abstract: A fin for a heat exchanger is joined to an outer surface of a tube, and facilitates a heat exchange between the tube and an air flowing around the tube. A sectional surface of the fin perpendicular to a flowing direction of an air has a corrugated shape that includes multiple flat portions substantially parallel to a flowing direction of the air, and a ridge portion connecting the adjacent flat portions. Multiple louvers cut in and raised from each of the flat portions at a predetermined cut-and-raised angle are disposed on the flat portion along a flowing direction of the air. A thickness of each flat portion is defined as t, a louver pitch of the louvers is defined as PL, and the thickness of each flat portion and the louver pitch satisfy a relationship of 0.035?t/PL?0.29.Type: ApplicationFiled: July 7, 2014Publication date: June 2, 2016Inventors: Mitsugu NAKAMURA, Masahiro SHIMOYA, Tadashi NAKABOU
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Patent number: 9074820Abstract: A heat exchanger includes a plurality of flat tubes in which a fluid flows, and a plurality of fins each of which is connected to flat surfaces of adjacent tubes to increase a heat exchange area on a side of air flowing outside of the tube. The fin includes a plate portion having a plate surface, and fin protrusions protruding from the plate surface of the plate portion. The fin protrusions are provided to be spaced from the flat surface of the tube by a predetermined distance. A flow resistance portion is provided to protrude from the flat surface of the tube toward outside by a protrusion dimension that is equal to or larger than the predetermined distance.Type: GrantFiled: July 23, 2010Date of Patent: July 7, 2015Assignee: DENSO CORPORATIONInventors: Atsushi Hayasaka, Masahiro Shimoya, Mitsugu Nakamura, Takashi Taki, Masahiro Omae, Aun Ota
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Patent number: 7926853Abstract: A pipe joint structure includes a plurality of fluid flow path portions, a socket connected to the fluid flow path portions, a connection plate disposed to abut against the socket, a plurality of pipes connected to each other by the connection plate, and a seal member disposed between the plurality of pipes and the socket. The socket includes a connection portion that is located to cover an edge of the connection plate and to fix the plurality of pipes to the plurality of fluid flow path portions. The pipe joint structure can be suitably used for a heat exchanger.Type: GrantFiled: February 15, 2007Date of Patent: April 19, 2011Assignee: DENSO CorporationInventors: Yoshiki Katoh, Mitsugu Nakamura, Arinori Shimizu, Sadayuki Kamiya, Hiroki Naganawa, Takaharu Nagoya, Takayuki Hirose
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Patent number: 7906919Abstract: A slip control device, a slip control method, and a vehicle provided with such a slip control device are provided, with which the vehicle can travel stably even on a slippery road surface while maintaining good road holding. The device has torque directive control means (23) for calculating torque directives for the motors respectively based on accelerator pedal depressions (24) and steering angles (26) and outputting them to each of motor control sections (21, 22) of the motors, first reference speed calculation means (48) for calculating a first reference speed of one of the pair of left and right motors to be controlled based on rotation speed of the other motor, and restriction applying means (20) for applying restriction to each of the torque directives based on a permissible speed range determined for each of the motors by applying prescribed permissible speed deviation to each of the calculated reference speeds.Type: GrantFiled: October 25, 2007Date of Patent: March 15, 2011Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Mitsugu Nakamura, Osamu Nakakita, Yoshihide Iwamoto, Atsushi Nakao
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Publication number: 20110017440Abstract: A heat exchanger includes a plurality of flat tubes in which a fluid flows, and a plurality of fins each of which is connected to flat surfaces of adjacent tubes to increase a heat exchange area on a side of air flowing outside of the tube. The fin includes a plate portion having a plate surface, and fin protrusions protruding from the plate surface of the plate portion. The fin protrusions are provided to be spaced from the flat surface of the tube by a predetermined distance. A flow resistance portion is provided to protrude from the flat surface of the tube toward outside by a protrusion dimension that is equal to or larger than the predetermined distance.Type: ApplicationFiled: July 23, 2010Publication date: January 27, 2011Applicant: DENSO CORPORATIONInventors: Atsushi Hayasaka, Masahiro Shimoya, Mitsugu Nakamura, Takashi Taki, Masahiro Omae, Aun Ota
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Patent number: 7841393Abstract: A heat exchanger has tubes, an inlet tank and an outlet tank. The inlet tank and the outlet tank are coupled to ends of the tubes. The inlet tank and the outlet tank have an inlet port and an outlet port, respectively, on ends thereof. The heat exchanger further has a cover member disposed in at least one of the inlet tank and the outlet tank. The cover member partly covers openings of the ends of predetermined tubes of the tubes, the predetermined tubes being closer to at least one of the inlet port and the outlet port.Type: GrantFiled: August 1, 2007Date of Patent: November 30, 2010Assignee: Denso CorporationInventors: Yasuhiro Sekito, Yoshihiko Okumura, Toshihiko Muraki, Mitsugu Nakamura
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Patent number: 7733044Abstract: An IPM (Interior Permanent Magnet) motor system is provided with an IPM motor provided with a stator having slots and a rotor having poles, and a control unit which controls the rotor to the stator. An estimation precision of an initial angle position of the rotor to the stator is selected such that it is substantially the same as an angle unit precision of stable positions of the rotor to the stator which is based on a combination of the number of poles and the number of slots. In this way, the cheap IPM motor system with a high drive efficiency and a control method of the IPM motor system are provided.Type: GrantFiled: February 23, 2006Date of Patent: June 8, 2010Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Mitsugu Nakamura, Shinichi Isobe, Takao Sakurai, Takaya Shirasu
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Publication number: 20090079370Abstract: An IPM (Interior Permanent Magnet) motor system is provided with an IPM motor provided with a stator having slots and a rotor having poles, and a control unit which controls the rotor to the stator. An estimation precision of an initial angle position of the rotor to the stator is selected such that it is substantially the same as an angle unit precision of stable positions of the rotor to the stator which is based on a combination of the number of poles and the number of slots. In this way, the cheap IPM motor system with a high drive efficiency and a control method of the IPM motor system are provided.Type: ApplicationFiled: February 23, 2006Publication date: March 26, 2009Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Mitsugu Nakamura, Shinichi Isobe, Takao Sakurai, Takaya Shirasu
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Publication number: 20090026984Abstract: A slip control device, a slip control method, and a vehicle provided with such a slip control device are provided, with which the vehicle can travel stably even on a slippery road surface maintaining good road holding. The device is provided with a torque directive control means (23) for calculating torque directives for the motors respectively based on acceleration pedal depressions (24) and steering angles (26) and outputting them to each of motor control sections (21, 22) of the motors, a first reference speed calculation means (48) for calculating first reference speed of one of the pair of left and right motors to be controlled based on rotation speed of the other motor of the pair of motors, and a restriction putting means (20) for putting restriction to each of the torque directives sent from the torque directive control means (23) based on a permissible speed range determined for each of the motors by putting prescribed permissible speed deviation to each of the calculated reference speeds.Type: ApplicationFiled: October 25, 2007Publication date: January 29, 2009Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Mitsugu Nakamura, Osamu Nakakita, Yoshihide Iwamoto, Atsushi Nakao
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Publication number: 20080029254Abstract: A heat exchanger has tubes, an inlet tank and an outlet tank. The inlet tank and the outlet tank are coupled to ends of the tubes. The inlet tank and the outlet tank have an inlet port and an outlet port, respectively, on ends thereof. The heat exchanger further has a cover member disposed in at least one of the inlet tank and the outlet tank. The cover member partly covers openings of the ends of predetermined tubes of the tubes, the predetermined tubes being closer to at least one of the inlet port and the outlet port.Type: ApplicationFiled: August 1, 2007Publication date: February 7, 2008Applicant: DENSO CorporationInventors: Yasuhiro Sekito, Yoshihiko Okumura, Toshihiko Muraki, Mitsugu Nakamura
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Patent number: 7304444Abstract: A battery vehicle includes a battery configured to supply DC power, and first and second motors configured to drive first and second wheels in response to first and second motor drive powers, respectively. A first inverters generates a first control data and supplies the first motor drive power to the first motor from the DC power while limiting the first motor drive power based on the first control data and a second data. A second inverter generates the second control data and supplies the second motor drive power to the second motor from the DC power while limiting the second motor drive power based on the first and second control data.Type: GrantFiled: February 10, 2006Date of Patent: December 4, 2007Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Shinichi Takano, Mitsugu Nakamura, Teruo Mizuno, Kazuya Fukuda
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Publication number: 20070205598Abstract: A pipe joint structure includes a plurality of fluid flow path portions, a socket connected to the fluid flow path portions, a connection plate disposed to abut against the socket, a plurality of pipes connected to each other by the connection plate, and a seal member disposed between the plurality of pipes and the socket. The socket includes a connection portion that is located to cover an edge of the connection plate and to fix the plurality of pipes to the plurality of fluid flow path portions. The pipe joint structure can be suitably used for a heat exchanger.Type: ApplicationFiled: February 15, 2007Publication date: September 6, 2007Applicant: DENSO CorporationInventors: Yoshiki Katoh, Mitsugu Nakamura, Arinori Shimizu, Sadayuki Kamiya, Hiroki Naganawa, Takaharu Nagoya, Takayuki Hirose
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Patent number: 7222044Abstract: A rotating speed detecting apparatus has: a bearing sensor configured to detect rotation of a motor and output detection pulses whose frequency depending on a rotating speed of the motor; and a calculating unit configured to receive the detection pulses from the bearing sensor. The detection pulses include a first pulse and a second pulse output next to the first pulse. The calculating unit calculates a revolution of the motor from a pulse interval between the first pulse and the second pulse.Type: GrantFiled: January 24, 2006Date of Patent: May 22, 2007Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Osamu Nakakita, Masayuki Morimoto, Takao Sakurai, Mitsugu Nakamura
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Publication number: 20060192430Abstract: A battery vehicle includes a battery configured to supply DC power, and first and second motors configured to drive first and second wheels in response to first and second motor drive powers, respectively. A first inverters generates a first control data and supplies the first motor drive power to the first motor from the DC power while limiting the first motor drive power based on the first control data and a second data. A second inverter generates the second control data and supplies the second motor drive power to the second motor from the DC power while limiting the second motor drive power based on the first and second control data.Type: ApplicationFiled: February 10, 2006Publication date: August 31, 2006Applicant: Mitsubishi Heavy Industries, Ltd.Inventors: Shinichi Takano, Mitsugu Nakamura, Teruo Mizuno, Kazuya Fukuda
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Publication number: 20060190213Abstract: A rotating speed detecting apparatus has: a bearing sensor configured to detect rotation of a motor and output detection pulses whose frequency depending on a rotating speed of the motor; and a calculating unit configured to receive the detection pulses from the bearing sensor. The detection pulses include a first pulse and a second pulse output next to the first pulse. The calculating unit calculates a revolution of the motor from a pulse interval between the first pulse and the second pulse.Type: ApplicationFiled: January 24, 2006Publication date: August 24, 2006Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Osamu Nakakita, Masayuki Morimoto, Takao Sakurai, Mitsugu Nakamura
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Publication number: 20060013574Abstract: An electrical heater includes plural heating body plates arranged in parallel with each other to define an air passage between adjacent two thereof, a positive electrode member joined to one end side of each heating body plate, and a negative electrode member joined to the other end side of each heating body plate. In the electrical heater, the heating body plates are arranged to directly heat air passing through the air passage when electrical power is supplied to the heating body plates through the electrode members. Accordingly, the electrical heater can effectively heat air with a simple structure.Type: ApplicationFiled: September 19, 2005Publication date: January 19, 2006Applicant: DENSO CorporationInventors: Hitoshi Ito, Eiichi Torigoe, Mitsugu Nakamura
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Publication number: 20040252986Abstract: An electrical heater includes plural heating body plates arranged in parallel with each other to define an air passage between adjacent two thereof, a positive electrode member joined to one end side of each heating body plate, and a negative electrode member joined to the other end side of each heating body plate. In the electrical heater, the heating body plates are arranged to directly heat air passing through the air passage when electrical power is supplied to the heating body plates through the electrode members. Accordingly, the electrical heater can effectively heat air with a simple structure.Type: ApplicationFiled: June 8, 2004Publication date: December 16, 2004Inventors: Hitoshi Ito, Eiichi Torigoe, Mitsugu Nakamura
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Patent number: 6341648Abstract: A heat exchanger a width dimension of which is much larger than a height dimension, in which an heat-exchanging medium flow resistance in a heat exchanging core portion is suppressed from increasing, and discharged air temperature is made uniform in the width direction of the heat-exchanging core portion. The heat-exchanging core portion is divided into a first core portion and a second core portion. The hot water in the first core portion and hot water in the second core portion flow in an opposite direction to each other. Thus, even when the heating heat exchanger, the width dimension of which is much larger than the height dimension, is used, the air temperature is prevented from varying in the width direction. Further, as the heat-exchanging medium flows in the first and second core portions in parallel, the heat-exchanging medium flow resistance is suppressed from increasing.Type: GrantFiled: April 22, 1998Date of Patent: January 29, 2002Assignee: Denso CorporationInventors: Mikio Fukuoka, Mitsugu Nakamura, Kazushi Shikata, Hikaru Sugi, Yukio Uemura