Patents by Inventor Seiji Tsuruta
Seiji Tsuruta 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).
-
Patent number: 10107155Abstract: A valve timing control apparatus of an internal combustion engine may include a driving rotational body to which torque is transmitted from a crankshaft, a driven rotational body fixed to a camshaft to which torque is transmitted from the driving rotational body, an electric motor disposed between the driving rotational body and the driven rotational body and relatively rotating the driving rotational body and the driven rotational body when electric power is applied thereto, and a deceleration mechanism that decelerates a rotational speed of the electric motor and transmits the decelerated rotational speed to the driven rotational body.Type: GrantFiled: November 21, 2016Date of Patent: October 23, 2018Assignees: Hyundai Motor Company, Hitachi Automotive Systems, Ltd.Inventors: Hong Wook Lee, Bonghoon Han, Jaechun Kim, Hyung Ick Kim, Yoshihiko Yamada, Manabu Katayama, Seiji Tsuruta
-
Patent number: 9874116Abstract: A valve timing control device for an internal combustion engine includes: a driving rotation member, a driven rotation member, a speed reduction mechanism, a circumferential clearance of the each of the rolling member being formed within an angle range of 0.01° to 0.4° in a circumferential direction from a reference line extending from a rotation axis of the driving rotation member in a radial direction, in a space constituted by the eccentric rotation member, the internal teeth constituting section, and the one of the holding holes.Type: GrantFiled: March 10, 2015Date of Patent: January 23, 2018Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Atsushi Yamanaka, Isao Doi, Seiji Tsuruta
-
Publication number: 20170167317Abstract: A valve timing control apparatus of an internal combustion engine may include a driving rotational body to which torque is transmitted from a crankshaft, a driven rotational body fixed to a camshaft to which torque is transmitted from the driving rotational body, an electric motor disposed between the driving rotational body and the driven rotational body and relatively rotating the driving rotational body and the driven rotational body when electric power is applied thereto, and a deceleration mechanism that decelerates a rotational speed of the electrical motor and transmit the decelerated rotational speed to the driven rotational body.Type: ApplicationFiled: November 21, 2016Publication date: June 15, 2017Applicants: Hyundai Motor Company, Hitachi Automotive Systems, Ltd.Inventors: Hong Wook Lee, Bonghoon Han, Jaechun Kim, Hyung Ick Kim, Yoshihiko Yamada, Manabu Katayama, Seiji Tsuruta
-
Publication number: 20170002699Abstract: A valve timing control apparatus includes: an urging member to which a set load is provided to act, to the cam shaft, an urging force from one of the most retard angle position and the most advance angle position toward the intermediate phase position; and a controller configured to sense, as the intermediate phase position, a position at which a relative rotational speed between the driving rotational member and the cam shaft is varied by the relative rotation of the cam shaft beyond a region in which the cam shaft is controlled by the set load of the urging member, when the cam shaft is controlled to be relatively rotated from the one of the most retard angle position and the most advance angle position beyond the intermediate phase position.Type: ApplicationFiled: September 19, 2016Publication date: January 5, 2017Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Naoki KOKUBO, Shinichi KAWADA, Seiji TSURUTA
-
Publication number: 20160348543Abstract: A valve timing control device for an internal combustion engine includes: a driving rotation member, a driven rotation member, a speed reduction mechanism, a circumferential clearance of the each of the rolling member being formed within an angle range of 0.01° to 0.4° in a circumferential direction from a reference line extending from a rotation axis of the driving rotation member in a radial direction, in a space constituted by the eccentric rotation member, the internal teeth constituting section, and the one of the holding holes.Type: ApplicationFiled: March 10, 2015Publication date: December 1, 2016Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Atsushi YAMANAKA, Isao DOI, Seiji TSURUTA
-
Patent number: 9470118Abstract: A valve timing control apparatus includes: an urging member to which a set load is provided to act, to the cam shaft, an urging force from one of the most retard angle position and the most advance angle position toward the intermediate phase position; and a controller configured to sense, as the intermediate phase position, a position at which a relative rotational speed between the driving rotational member and the cam shaft is varied by the relative rotation of the cam shaft beyond a region in which the cam shaft is controlled by the set load of the urging member, when the cam shaft is controlled to be relatively rotated from the one of the most retard angle position and the most advance angle position beyond the intermediate phase position.Type: GrantFiled: September 12, 2013Date of Patent: October 18, 2016Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Naoki Kokubo, Shinichi Kawada, Seiji Tsuruta
-
Patent number: 9068626Abstract: A balancer device of an internal combustion engine, has a drive gear engaged with an input gear to which a rotation force is transmitted from a crankshaft; a balancer drive shaft to which the rotation force is transmitted from the drive gear and which has a balancer weight; a balancer drive gear rotating integrally with the balancer drive shaft; a balancer driven gear engaged with the balancer drive gear; and a balancer driven shaft rotating integrally with the balancer driven gear and having a balancer weight. At least one of the drive gear, the balancer drive gear and the balancer driven gear is provided, on both axial direction side surfaces thereof, with ring-shaped grooves whose diameters are different from each other. The ring-shaped grooves are formed up to a depth from the surface of the gear at which both the ring-shaped grooves overlap each other in the axial direction.Type: GrantFiled: January 6, 2014Date of Patent: June 30, 2015Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Masaharu Saito, Tamotsu Todo, Masaharu Kitamura, Harunobu Okabe, Seiji Tsuruta, Takashi Hirano
-
Patent number: 8899197Abstract: A valve-timing control apparatus includes a drive rotator configured to receive a rotation from a crankshaft; a driven rotator fixed to a cam shaft; and an electric motor. The electric motor includes a stator fixed to the driven rotator, a rotor that rotates relative to the stator, a coil provided to at least one of the stator and the rotor, and a motor output shaft fixed to the rotor.Type: GrantFiled: April 1, 2011Date of Patent: December 2, 2014Assignee: Hitachi Automotive Systems, Ltd.Inventors: Naoki Kokubo, Shinichi Kawada, Seiji Tsuruta
-
Publication number: 20140190442Abstract: A balancer device of an internal combustion engine, has a drive gear engaged with an input gear to which a rotation force is transmitted from a crankshaft; a balancer drive shaft to which the rotation force is transmitted from the drive gear and which has a balancer weight; a balancer drive gear rotating integrally with the balancer drive shaft; a balancer driven gear engaged with the balancer drive gear; and a balancer driven shaft rotating integrally with the balancer driven gear and having a balancer weight. At least one of the drive gear, the balancer drive gear and the balancer driven gear is provided, on both axial direction side surfaces thereof, with ring-shaped grooves whose diameters are different from each other. The ring-shaped grooves are formed up to a depth from the surface of the gear at which both the ring-shaped grooves overlap each other in the axial direction.Type: ApplicationFiled: January 6, 2014Publication date: July 10, 2014Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Masaharu Saito, Tamotsu Todo, Masaharu Kitamura, Harunobu Okabe, Seiji Tsuruta, Takashi Hirano
-
Patent number: 8677965Abstract: A valve timing control device comprises a drive rotation member driven by a crankshaft of an internal combustion engine; a driven rotation member fixed to a camshaft that actuates engine valves to open and close, the drive rotation member and driven rotation member being coaxially arranged to make a relative rotation therebetween; a phase varying mechanism that rotates the driven rotation member relative to the drive rotation member within a given angle, the phase varying mechanism being able to cause the driven rotation member to take the most-retarded phase position, the most-advanced phase position and a middle phase position defined between the most-retarded phase position and the most-advanced phase position; and a position keeping mechanism that is able to keep the driven rotation member at least the most-retarded phase position and the middle phase position at the time of starting the engine, and is able to select one of the most-retarded phase position and the middle phase position in accordance withType: GrantFiled: April 5, 2011Date of Patent: March 25, 2014Assignee: Hitachi Automotive Systems, Ltd.Inventors: Hiroyuki Kato, Seiji Tsuruta, Kotaro Watanabe, Yoshinori Ichinosawa
-
Publication number: 20140076253Abstract: A valve timing control apparatus includes: an urging member to which a set load is provided to act, to the cam shaft, an urging force from one of the most retard angle position and the most advance angle position toward the intermediate phase position; and a controller configured to sense, as the intermediate phase position, a position at which a relative rotational speed between the driving rotational member and the cam shaft is varied by the relative rotation of the cam shaft beyond a region in which the cam shaft is controlled by the set load of the urging member, when the cam shaft is controlled to be relatively rotated from the one of the most retard angle position and the most advance angle position beyond the intermediate phase position.Type: ApplicationFiled: September 12, 2013Publication date: March 20, 2014Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Naoki KOKUBO, Shinichi Kawada, Seiji Tsuruta
-
Patent number: 8544429Abstract: A valve control apparatus includes a variable mechanism configured to vary operating states of two intake valves by varying a swing range of a single swing cam; a primary swing arm configured to receive swinging force from the swing cam by becoming in contact with the swing cam, and configured to open/close one of the two intake valves; a secondary swing arm configured to open/close another of the two intake valves; and a connection changeover mechanism configured to connect/disconnect the primary swing arm with/from the secondary swing arm in accordance with an operating state of engine. The connection changeover mechanism disconnects the primary swing arm from the secondary swing arm to maintain the another of the two intake valves in a non-lifted state, when the variable mechanism controls a swing amount of the primary swing arm within a range below a predetermined amount.Type: GrantFiled: November 11, 2010Date of Patent: October 1, 2013Assignee: Hitachi Automotive Systems, Ltd.Inventors: Makoto Nakamura, Seiji Tsuruta
-
Publication number: 20120073534Abstract: A valve lifter for an internal combustion engine includes a skirt portion formed in a tubular shape; and a crown portion formed integrally with an axially one end side of the skirt portion. The crown portion includes a crown surface configured to slide in contact with an outer circumferential surface of a cam. An axis of the crown portion is eccentric from a center of the cam in a width direction of the cam. The crown surface is formed in a spherical protruding shape to have its uppermost portion at a center of the crown surface. A protruding amount of the spherical protruding shape is set to range from 11 ?m to 50 ?m.Type: ApplicationFiled: March 31, 2011Publication date: March 29, 2012Inventors: Tomoya TANAKA, Noriomi Hosaka, Seiji Tsuruta
-
Publication number: 20120017857Abstract: A valve timing control device comprises a drive rotation member driven by a crankshaft of an internal combustion engine; a driven rotation member fixed to a camshaft that actuates engine valves to open and close, the drive rotation member and driven rotation member being coaxially arranged to make a relative rotation therebetween; a phase varying mechanism that rotates the driven rotation member relative to the drive rotation member within a given angle, the phase varying mechanism being able to cause the driven rotation member to take the most-retarded phase position, the most-advanced phase position and a middle phase position defined between the most-retarded phase position and the most-advanced phase position; and a position keeping mechanism that is able to keep the driven rotation member at least the most-retarded phase position and the middle phase position at the time of starting the engine, and is able to select one of the most-retarded phase position and the middle phase position in accordance withType: ApplicationFiled: April 5, 2011Publication date: January 26, 2012Inventors: Hiroyuki KATO, Seiji Tsuruta, Kotaro Watanabe, Yoshinori Ichinosawa
-
Patent number: 8061315Abstract: A variable valve actuating apparatus for an internal combustion engine includes: a control shaft rotatably supported through a bearing to a body of the engine, and arranged to rotate about a center axis to control an operating state of an engine valve, the control shaft including; a control cam having a center which is off the center axis of the control shaft in a first direction; and a journal portion rotatably supported by the bearing, the journal portion having a center axis which is off the center axis of the control shaft in a second direction different from the first direction of the control cam.Type: GrantFiled: March 11, 2009Date of Patent: November 22, 2011Assignee: Hitachi, Ltd.Inventors: Makoto Nakamura, Seinosuke Hara, Seiji Tsuruta, Mikihiro Kajiura
-
Publication number: 20110253085Abstract: A valve-timing control apparatus includes a drive rotator configured to receive a rotation from a crankshaft; a driven rotator fixed to a cam shaft; and an electric motor. The electric motor includes a stator fixed to the driven rotator, a rotor that rotates relative to the stator, a coil provided to at least one of the stator and the rotor, and a motor output shaft fixed to the rotor.Type: ApplicationFiled: April 1, 2011Publication date: October 20, 2011Inventors: Naoki KOKUBO, Shinichi Kawada, Seiji Tsuruta
-
Patent number: 8006658Abstract: A variable valve actuation apparatus of an internal combustion engine has a multinodular-link motion converter, to vary at least a working angle. A position of rotation of a control shaft, variably adjusting the attitude of the motion converter, is set, so that, at a peak lift during a valve opening period, an angle ?2 between an extension line of a line segment connecting a first fulcrum corresponding to a drive-eccentric-cam center and a second fulcrum provided on a rocker arm and a line segment connecting the second fulcrum and a third fulcrum provided on the rocker arm at a position different from the second fulcrum at a middle working-angle control mode is less than both an angle ?1 between the two line segments at a minimum working-angle control mode and an angle ?3 between the two line segments at a maximum working-angle control mode.Type: GrantFiled: January 27, 2009Date of Patent: August 30, 2011Assignee: Hitachi, Ltd.Inventors: Makoto Nakamura, Noriomi Hosaka, Mikihiro Kajiura, Yoshihiko Yamada, Seiji Tsuruta, Seinosuke Hara
-
Publication number: 20110120398Abstract: A valve control apparatus includes a variable mechanism configured to vary operating states of two intake valves by varying a swing range of a single swing cam; a primary swing arm configured to receive swinging force from the swing cam by becoming in contact with the swing cam, and configured to open/close one of the two intake valves; a secondary swing arm configured to open/close another of the two intake valves; and a connection changeover mechanism configured to connect/disconnect the primary swing arm with/from the secondary swing arm in accordance with an operating state of engine. The connection changeover mechanism disconnects the primary swing arm from the secondary swing arm to maintain the another of the two intake valves in a non-lifted state, when the variable mechanism controls a swing amount of the primary swing arm within a range below a predetermined amount.Type: ApplicationFiled: November 11, 2010Publication date: May 26, 2011Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.Inventors: Makoto Nakamura, Seiji Tsuruta
-
Publication number: 20090235886Abstract: A variable valve actuating apparatus for an internal combustion engine includes: a control shaft rotatably supported through a bearing to a body of the engine, and arranged to rotate about a center axis to control an operating state of an engine valve, the control shaft including; a control cam having a center which is off the center axis of the control shaft in a first direction; and a journal portion rotatably supported by the bearing, the journal portion having a center axis which is off the center axis of the control shaft in a second direction different from the first direction of the control cam.Type: ApplicationFiled: March 11, 2009Publication date: September 24, 2009Inventors: Makoto Nakamura, Seinosuke Hara, Seiji Tsuruta, Mikihiro Kajiura
-
Publication number: 20090188454Abstract: A variable valve actuation apparatus of an internal combustion engine has a multinodular-link motion converter, to vary at least a working angle. A position of rotation of a control shaft, variably adjusting the attitude of the motion converter, is set, so that, at a peak lift during a valve opening period, an angle ?2 between an extension line of a line segment connecting a first fulcrum corresponding to a drive-eccentric-cam center and a second fulcrum provided on a rocker arm and a line segment connecting the second fulcrum and a third fulcrum provided on the rocker arm at a position different from the second fulcrum at a middle working-angle control mode is less than both an angle ?1 between the two line segments at a minimum working-angle control mode and an angle ?3 between the two line segments at a maximum working-angle control mode.Type: ApplicationFiled: January 27, 2009Publication date: July 30, 2009Inventors: Makoto Nakamura, Norimoi Hosaka, Mikihiro Kajiura, Yoshihiko Yamada, Seiji Tsuruta, Seinosuke Hara