Patents by Inventor Kazunari Adachi

Kazunari Adachi 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: 10301983
    Abstract: A relief valve includes a housing including an internal flow passage through which a working fluid flows, and a relief port discharging the working fluid from the internal flow passage, and a valve body including a first pressure-receiving portion a second pressure-receiving portion receiving pressure with a pressure-receiving area that is larger than a pressure-receiving area of the first pressure-receiving portion, and a first recessed portion formed at the second pressure-receiving portion at an opposite side relative to a pressure-receiving surface of the second pressure-receiving portion and including a closed-end cylindrical shape. The relief valve includes a biasing force adjustment mechanism including a spring of which one end is held at the first recessed portion, a support portion retaining the other end of the spring and including a closed-end cylindrical shape, and a motor adjusting a rotational angle and causing the support portion to reciprocate.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: May 28, 2019
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Atsuo Isoda, Masatoshi Nakamura, Yuichi Kato, Takahiro Sakai, Kazunari Adachi
  • Patent number: 9976455
    Abstract: This internal combustion engine includes a piston, an oil jet that operates at a predetermined operating pressure to supply oil to the piston, and a hydraulic controller provided upstream of an oil passage including the oil jet. The hydraulic controller includes a constantly opened first passage through which the oil having a pressure lower than the predetermined operating pressure is supplied to the oil jet, a second passage provided alongside of the first passage and being openable and closable, through which the oil having a pressure higher than the predetermined operating pressure is supplied to the oil jet in combination with the first passage in a state where the same is opened, and an opening-closing control portion that controls the second passage to be in an open state when actuating the oil jet, and controls the second passage to be in a closed state when stopping actuating the oil jet.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: May 22, 2018
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Shinji Kazaoka, Kazunari Adachi
  • Publication number: 20170284242
    Abstract: A relief valve includes a housing including an internal flow passage through which a working fluid flows, and a relief port discharging the working fluid from the internal flow passage, and a valve body including a first pressure-receiving portion a second pressure-receiving portion receiving pressure with a pressure-receiving area that is larger than a pressure-receiving area of the first pressure-receiving portion, and a first recessed portion formed at the second pressure-receiving portion at an opposite side relative to a pressure-receiving surface of the second pressure-receiving portion and including a closed-end cylindrical shape. The relief valve includes a biasing force adjustment mechanism including a spring of which one end is held at the first recessed portion, a support portion retaining the other end of the spring and including a closed-end cylindrical shape, and a motor adjusting a rotational angle and causing the support portion to reciprocate.
    Type: Application
    Filed: November 11, 2015
    Publication date: October 5, 2017
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Atsuo ISODA, Masatoshi NAKAMURA, Yuichi KATO, Takahiro SAKAI, Kazunari ADACHI
  • Publication number: 20170016364
    Abstract: This internal combustion engine includes a piston, an oil jet that operates at a predetermined operating pressure to supply oil to the piston, and a hydraulic controller provided upstream of an oil passage including the oil jet. The hydraulic controller includes a constantly opened first passage through which the oil having a pressure lower than the predetermined operating pressure is supplied to the oil jet, a second passage provided alongside of the first passage and being openable and closable, through which the oil having a pressure higher than the predetermined operating pressure is supplied to the oil jet in combination with the first passage in a state where the same is opened, and an opening-closing control portion that controls the second passage to be in an open state when actuating the oil jet, and controls the second passage to be in a closed state when stopping actuating the oil jet.
    Type: Application
    Filed: October 1, 2014
    Publication date: January 19, 2017
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Shinji KAZAOKA, Kazunari ADACHI
  • Patent number: 9267401
    Abstract: A valve timing controller includes a driving-side rotary member, a driven-side rotary member, an advancing chamber and a retarding chamber formed as a fluid pressure chamber is partitioned by a partitioning portion provided on an outer circumferential side of the driven-side rotary member, and a phase controlling section. The driven-side rotary member includes an advancing passage communicated to the advancing chamber and a retarding passage communicated to the retarding chamber. The driving-side rotary member is formed of an aluminum-based material. The driven-side rotary member integrally includes an outer circumferential member having the partitioning portion and formed of an aluminum-based material, and an inner circumferential member constituting an inner circumferential side of the outer circumferential member and formed of an iron-based material.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: February 23, 2016
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Yuji Noguchi, Kazunari Adachi, Kenji Ikeda
  • Patent number: 9243523
    Abstract: A valve timing control device includes a lock mechanism having a hole portion formed in one of the driving-side/driven-side rotational members, a sleeve in the hole portion, a lock member in the sleeve and capable of projecting and retracting with respect to the other of the driving-side/driven-side members, and a lock hole formed in the other of the driving-side/driven-side members such that the lock member can be fitted to the lock hole when the lock member projects. The lock mechanism constrains a relative rotational phase of the driven-side rotational member with respect to the driving-side rotational member at a predetermined phase when the lock member is fitted to the lock hole. A first chamfered surface is formed in the circumferential direction at an inner-circumferential corner of an end of the sleeve on the side opposite to the side facing the lock hole.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: January 26, 2016
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Yuji Noguchi, Kazunari Adachi, Hideyuki Suganuma, Shinji Oe, Takeo Asahi
  • Publication number: 20160017772
    Abstract: A valve opening/closing timing control device includes a housing main body that includes an opening which opens to at least one side in a direction along a rotational axis and a cover plate closing the opening by making contact with an end surface of the opening, the drive side rotational body rotating synchronously with a crankshaft, and a driven side rotational body housed within the drive-side rotational body and defining an advance chamber and a retardation chamber relative to an inner peripheral surface of the housing main body, the driven-side rotational body rotating integrally with a camshaft and coaxially with the rotational axis. In addition, the housing main body includes a hard layer formed at least at the inner peripheral surface of the housing main body in a surface thereof excluding the end surface of the opening.
    Type: Application
    Filed: March 14, 2014
    Publication date: January 21, 2016
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Takeo ASAHI, Yuji NOGUCHI, Kazunari ADACHI, Tadashi SUGIMOTO
  • Patent number: 9151190
    Abstract: A valve timing controller includes: a driving-side rolling body configured to rotate synchronously with an engine crankshaft; a driven-side rolling body configured to rotate in a unified manner with a camshaft for opening/closing an engine valve relative to the driving-side rolling body; an advance chamber, and a retard chamber; a torsion spring disposed in a space formed between a front plate or a rear plate of the driving-side rolling body and the driven-side rolling body and configured to bias at all times the driving-side rolling body and the driven-side rolling body in the advance direction or the retard direction; and a first cylindrical portion provided in the front plate or the rear plate and a second cylindrical portion provided in the driven-side rolling body, the first and second cylindrical portions being insertable into each other in an axial direction.
    Type: Grant
    Filed: September 26, 2011
    Date of Patent: October 6, 2015
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Yuji Noguchi, Kazunari Adachi, Takeo Asahi
  • Patent number: 9103239
    Abstract: A valve opening-closing timing control device includes: a driving rotating body that rotates synchronously with a crankshaft; a following rotating body that rotates integrally with a cam shaft; a phase control mechanism that controls changing of relative rotational phases of the driving and following rotating bodies; a torsion coil spring engaged by a front member of the driving rotating body and by the following driving body, and biases the following rotating body in an advance/retarded direction with respect to the driving rotating body. The front member includes multiple bearing surfaces to be attached with countersunk head screws, and an engaging part engaging an end of the torsion coil spring with the torsion coil spring in a twisted state. The engaging part includes a mounting part for a tool with which the end of the torsion coil spring is moved in a direction increasing torsion strength of the torsion coil spring.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: August 11, 2015
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Yuji Noguchi, Akihiko Kusaka, Atsushi Homma, Takeo Asahi, Kazunari Adachi
  • Patent number: 9004028
    Abstract: Even when sliding occurs between a radially extending face of a spring member and at least one of a driving-side rotary member and a driven-side rotary member, wear of the at least one of the driving-side rotary member and the driven-side rotary member is prevented. Along the axial direction of the camshaft, a torsion spring is provided between the driven-side rotary member and a housing side face portion for urging the relative rotational phase to the angle advancing direction or the angle retarding direction, and a spring washer is disposed between the driven-side rotary member and the torsion spring.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: April 14, 2015
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Yuji Noguchi, Kazunari Adachi, Atsushi Homma, Takeo Asahi
  • Publication number: 20150096513
    Abstract: A valve timing controller includes a driving-side rotary member, a driven-side rotary member, an advancing chamber and a retarding chamber formed as a fluid pressure chamber is partitioned by a partitioning portion provided on an outer circumferential side of the driven-side rotary member, and a phase controlling section. The driven-side rotary member includes an advancing passage communicated to the advancing chamber and a retarding passage communicated to the retarding chamber. The driving-side rotary member is formed of an aluminum-based material. The driven-side rotary member integrally includes an outer circumferential member having the partitioning portion and formed of an aluminum-based material, and an inner circumferential member constituting an inner circumferential side of the outer circumferential member and formed of an iron-based material.
    Type: Application
    Filed: June 20, 2013
    Publication date: April 9, 2015
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Yuji Noguchi, Kazunari Adachi, Kenji Ikeda
  • Publication number: 20150027393
    Abstract: A valve timing control device includes a lock mechanism having a hole portion formed in one of the driving-side/driven-side rotational members, a sleeve in the hole portion, a lock member in the sleeve and capable of projecting and retracting with respect to the other of the driving-side/driven-side members, and a lock hole formed in the other of the driving-side/driven-side members such that the lock member can be fitted to the lock hole when the lock member projects. The lock mechanism constrains a relative rotational phase of the driven-side rotational member with respect to the driving-side rotational member at a predetermined phase when the lock member is fitted to the lock hole. A first chamfered surface is formed in the circumferential direction at an inner-circumferential corner of an end of the sleeve on the side opposite to the side facing the lock hole.
    Type: Application
    Filed: December 21, 2012
    Publication date: January 29, 2015
    Inventors: Yuji Noguchi, Kazunari Adachi, Hideyuki Suganuma, Shinji Oe, Takeo Asahi
  • Patent number: 8919310
    Abstract: Provided is a valve open/close timing control device including, a drive-side rotating body, a driven-side rotating body, a fluid pressure chamber, a partition portion, a fluid control valve part, a first locking mechanism which is capable of restraining a relative rotational phase of the driven-side rotating body relative to the drive-side rotating body at a first predetermined phase between a most retarded angle phase and a most advanced angle phase, and a second locking mechanism which is capable of restraining the relative rotational phase at a second predetermined phase on a more retarded angle side than the first predetermined phase, in which the relative rotational phase is changed to the first predetermined phase when a shift lever position is changed to a parking range.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: December 30, 2014
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Masaki Kobayashi, Kazunari Adachi, Kazuo Ueda
  • Patent number: 8915223
    Abstract: Provided is a valve timing control apparatus that allows relaxation of manufacturing precision of a driving-side rotary member and a driven-side rotary member and that achieves space saving at the same time. An urging member includes at least one trough-folded portion and at least one crest-folded portion, one end side contact portion formed between one terminal end of the urging member and the trough-folded portion and coming into contact with a sealing element, and other end side contact portion formed between the other terminal end of the urging member and the crest-folded portion and coming into contact with a partitioning portion. In association with urging of the urging member, the distance between the one end side contact portion and the other end side contact portion along the urging direction is decreased and the angles of the trough-folded portion and the crest-folded portion are decreased.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: December 23, 2014
    Assignees: Aisin Seiki Kabushiki Kaisha, Yamani Spring Co., Ltd.
    Inventors: Atsushi Homma, Kazunari Adachi, Yuji Noguchi, Satoshi Nishizawa
  • Patent number: 8910604
    Abstract: A valve timing control device that enables simplification of the manufacturing process and reduction of the number of parts while suppressing deformation of a driven rotary element. The valve timing control device includes a driving rotary element, a driven rotary element, a plurality of partitions each for dividing a fluid pressure chamber into a regarded angle chamber and an advanced angle chamber, and a connecting element for connecting the driven rotary element to a camshaft. The connecting element includes a press fitting portion having a plurality of fitting segments configured to fit to an inner circumference of a recess of the driven rotary element. At least one of centerlines of the fitting segments extending in a radial direction does not overlap any of the partitions.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: December 16, 2014
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Kazunari Adachi, Yuji Noguchi, Atsushi Homma, Takeo Asahi
  • Patent number: 8910605
    Abstract: A valve timing control device includes a driving rotary element synchronously rotatable with a crankshaft; a driven rotary element mounted coaxially with the driving rotary element and synchronously rotatable with a camshaft; a plurality of partitions provided in the driven rotary element each for dividing a fluid pressure chamber formed between the driving rotary element and the driven rotary element into a regarded angle chamber and an advanced angle chamber; and a connecting element for connecting the driven rotary element to the camshaft. The connecting element includes a flange inserted into a recess formed in the driven rotatory element, and a shaft portion inserted into a through bore formed in a wall of the driving rotary element adjacent to the camshaft. The flange has an outer diameter larger than that of the shaft portion, and is disposed between the driven rotary element and the wall.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: December 16, 2014
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Kazunari Adachi, Yuji Noguchi, Atsushi Homma, Takeo Asahi
  • Publication number: 20140311432
    Abstract: A valve opening-closing timing control device includes: a driving rotating body that rotates synchronously with a crankshaft; a following rotating body that rotates integrally with a cam shaft; a phase control mechanism that controls changing of relative rotational phases of the driving and following rotating bodies; a torsion coil spring engaged by a front member of the driving rotating body and by the following driving body, and biases the following rotating body in an advance/retarded direction with respect to the driving rotating body. The front member includes multiple bearing surfaces to be attached with countersunk head screws, and an engaging part engaging an end of the torsion coil spring with the torsion coil spring in a twisted state. The engaging part includes a mounting part for a tool with which the end of the torsion coil spring is moved in a direction increasing torsion strength of the torsion coil spring.
    Type: Application
    Filed: December 10, 2012
    Publication date: October 23, 2014
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Yuji Noguchi, Akihiko Kusaka, Atsushi Homma, Takeo Asahi, Kazunari Adachi
  • Patent number: 8857388
    Abstract: Provided is a valve open/close timing control system where a valve open/close timing control device includes a drive-side rotating member, a driven-side rotating member, a relative rotational phase control mechanism, and a first locking member, in which the internal combustion engine is configured to be started by a drive force generated by a traveling motor or by a drive force generated by a starter motor, and the valve open/close timing control system also includes a control unit which is configured, for starting the internal combustion engine while changing the relative rotational phase at the time of starting the internal combustion engine, to drive the starter motor or the traveling motor at the time of starting the internal combustion engine at the first locking phase, and to drive the traveling motor at the time of starting the internal combustion engine at the second locking phase.
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: October 14, 2014
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Masaki Kobayashi, Kazunari Adachi, Kazuo Ueda
  • Patent number: 8820278
    Abstract: A valve timing control apparatus includes a driving-side rotary body, a driven-side rotary body, a fluid pressure chamber partitioned into a retard angle chamber and an advance angle chamber by a partitioning portion provided in at least one of the driving-side rotary body and the driven-side rotary body, a fluid control mechanism for controlling feeding of working fluid from a working fluid pump for feeding the working fluid to the fluid pressure chamber and controlling also discharging of the working fluid from the fluid pressure chamber, a first lock mechanism capable of restraining a relative rotational phase to a first predetermined phase between a most retarded angle phase and a most advanced angle phase, and a second lock mechanism capable of restraining the relative rotational phase to a second predetermined phase different from the first predetermined phase.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: September 2, 2014
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Masaki Kobayashi, Kazunari Adachi, Mitsuru Uozaki, Kenji Fujiwaki, Shohei Masuda
  • Patent number: 8800516
    Abstract: A variable valve timing control apparatus includes a driving side rotation member synchronously rotating with a crankshaft of an internal combustion engine, a driven side rotation member including a rotation peripheral surface, an intermediate lock mechanism for locking a rotational phase of the driven side rotation member at an intermediate phase between a most retarded angle phase and a most advanced angle phase, and a fixed member fixed to the internal combustion engine and including a fixed peripheral surface facing the rotation peripheral surface of the driven side rotation member. Plural seal rings each formed in an annular shape are positioned between the rotation peripheral surface of the driven side rotation member and the fixed peripheral surface of the fixed member, the seal rings positioned spaced apart from each other by a predetermined distance.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: August 12, 2014
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Masaki Kobayashi, Kazunari Adachi