Patents by Inventor Kiyoyuki Kawai

Kiyoyuki Kawai 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: 11141783
    Abstract: An object of the present invention is to provide a cylinder liner for insert casting that can improve the joining strength between a cylinder liner and a cylinder block by reducing voids generated between the cylinder liner and the cylinder block. The above-described problem can be solved when the molten metal running index YI defined by the following Formula (1) is from 2.2 to 14.5. Molten metal running index YI=[area ratio St (%) of top portions of protrusions×molten metal infiltration volume V (mm3)/surface area A (mm2) of cylinder liner base]/average surface-to-surface distance Pav between top portions of protrusions (mm)??(1).
    Type: Grant
    Filed: May 3, 2021
    Date of Patent: October 12, 2021
    Assignees: TPR Co., Ltd., IPR Industry Co., Ltd.
    Inventors: Yasutomo Tokairin, Koichi Hatakeyama, Kiyoyuki Kawai
  • Publication number: 20200256277
    Abstract: To reduce a friction, and to provide an excellent seizing resistance. Provided is a cast iron cylinder liner including an inner peripheral sliding surface made of cast iron, and an internal combustion engine including a cylinder bore including an inner peripheral sliding surface made of cast iron, wherein the inner peripheral sliding surface includes a region satisfying Expression (1) to Expression (3), Rvk/Rk?1.0 ??Expression (1) 0.08 ?m?Rk?0.3 ?m Expression (2) Rk?Rpk>0 Expression (3) [Rk is the core roughness depth based on JIS B0671-2:2002, Rpk is the reduced peak height based on JIS B0671-2:2002, and Rvk is the reduced valley depth based on JIS B0671-2:2002 in Expression (1) to Expression (3)].
    Type: Application
    Filed: July 5, 2019
    Publication date: August 13, 2020
    Applicants: TPR CO., LTD., TPR INDUSTRY CO., LTD.
    Inventors: Kiyoyuki KAWAI, Shinji AMAIKE, Tetsuya NANGO, Seiji TAMAKI, Seeroku HOSHINO, Wataru SUZUKI, Takashi OIZUMI, Hiroshi YAGUCHI, Takashi SUZUKI
  • Publication number: 20190144978
    Abstract: Provided is a cast iron material from which excellent friction characteristics can be obtained. Provided is the cast iron material containing C and Fe as a composition, and further containing Cr as the composition in 1.0 to 3.5% in terms of mass %. The cast iron material is used in a sliding component sliding under an environment of lubricating oil to which an additive containing Mo as a constituent element, such as MoDTC, is added. Cr contained in the cast iron material promotes a decomposition reaction of the additive containing Mo added to the lubricating oil to form a film of molybdenum disulfide, the film having low friction. Thus, the fiction can be reduced.
    Type: Application
    Filed: November 16, 2018
    Publication date: May 16, 2019
    Applicants: TOYOTA MOTOR EAST JAPAN, INC., TOYOTA JIDOSHA KABUSHIKI KAISHA, TPR CO., LTD., TPR INDUSTRY CO., LTD., HappyProduct Inc.
    Inventors: Ryo KOIKE, Atsushi Suzuki, Kazuyoshi Manabe, Kiyoyuki Kawai, Masami Horigome, Takashi Oizumi, Tetsuo Hasegawa, Katsunori Kanauchi, Mihoko Sawada, Kazue Kurihara, Koshi Adachi
  • Patent number: 9883145
    Abstract: According to one embodiment, an onboard camera automatic calibration apparatus includes at least a road surface point selection unit, an amount-of-rotation-around-Z-axis calculation unit and a coordinate rotation correction unit. The road surface point selection unit selects multiple points not less than three on a road surface in a predetermined image among the multiple images obtained by an onboard camera and selects multiple combinations of two points from among the multiple points. The amount-of-rotation-around-Z-axis calculation unit determines, in a camera coordinate system with an optical axis as a Z axis, an amount of rotation around the Z axis such that the road surface is parallel to an X axis, based on the multiple combinations and motion vectors. The coordinate rotation correction unit performs rotation correction around the Z axis for the images obtained by the onboard camera based on the determined amount of rotation around the Z axis.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: January 30, 2018
    Assignee: TOSHIBA ALPINE AUTOMOTIVE TECHNOLOGY CORPORATION
    Inventor: Kiyoyuki Kawai
  • Patent number: 9416434
    Abstract: Provided is a high-toughness coating film having excellent wear resistance, in particular, resistance to cracking and peeling. A high-toughness coating film (2) includes a composition containing a mixture of metallic chromium, in which nitrogen is dissolved, and Cr2N. A content of the nitrogen in the high-toughness coating film is 2.0 to 8.5 mass %, and IP, which is expressed by total of each diffraction peak intensity of Cr2N/(total of each diffraction peak intensity of metallic chromium+total of each diffraction peak intensity of Cr2N), is 3 to 40% when 2? is in a range of 30° to 90°, where ? is an incident angle in X-ray diffraction of the high-toughness coating film.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: August 16, 2016
    Assignee: TPR CO., LTD.
    Inventors: Kiyoyuki Kawai, Shoji Tanaka
  • Patent number: 9123137
    Abstract: A motion vector computing device according to one embodiment includes: a difference computing unit that computes inter-frame temporal difference value It, uses horizontal direction inter-pixel difference value Ix and vertical direction inter-pixel difference value Iy in a same frame, the current frame signal and the different frame signals when the pixel moves for a small-time, a variance matrix generating unit computes the variances of the gradient in the horizontal direction, in the vertical direction and in the temporal direction of the luminance value on the basis of the difference values Ix, Iy and It, a coefficient computing unit computes a coefficient of a flat plane formula by calculating a formula for giving a minimum with regard to the square error of the flat plane formula approximating the distribution of luminance gradients of the pixel and a vector computing unit computes the motion vector uses the coefficient.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: September 1, 2015
    Assignee: Toshiba Alpine Automotive Technology Corporation
    Inventors: Kiyoyuki Kawai, Kenji Furukawa
  • Publication number: 20150093586
    Abstract: Provided is a high-toughness coating film having excellent wear resistance, in particular, resistance to cracking and peeling. A high-toughness coating film (2) includes a composition containing a mixture of metallic chromium, in which nitrogen is dissolved, and Cr2N. A content of the nitrogen in the high-toughness coating film is 2.0 to 8.5 mass %, and IP, which is expressed by total of each diffraction peak intensity of Cr2N/(total of each diffraction peak intensity of metallic chromium+total of each diffraction peak intensity of Cr2N), is 3 to 40% when 20 is in a range of 30° to 90°, where ? is an incident angle in X-ray diffraction of the high-toughness coating film.
    Type: Application
    Filed: March 16, 2012
    Publication date: April 2, 2015
    Inventors: Kiyoyuki Kawai, Shoji Tanaka
  • Publication number: 20130307982
    Abstract: According to one embodiment, an onboard camera automatic calibration apparatus includes at least a road surface point selection unit, an amount-of-rotation-around-Z-axis calculation unit and a coordinate rotation correction unit. The road surface point selection unit selects multiple points not less than three on a road surface in a predetermined image among the multiple images obtained by an onboard camera and selects multiple combinations of two points from among the multiple points. The amount-of-rotation-around-Z-axis calculation unit determines, in a camera coordinate system with an optical axis as a Z axis, an amount of rotation around the Z axis such that the road surface is parallel to an X axis, based on the multiple combinations and motion vectors. The coordinate rotation correction unit performs rotation correction around the Z axis for the images obtained by the onboard camera based on the determined amount of rotation around the Z axis.
    Type: Application
    Filed: February 26, 2013
    Publication date: November 21, 2013
    Applicant: TOSHIBA ALPINE AUTOMOTIVE TECHNOLOGY CORPORATION
    Inventor: Kiyoyuki KAWAI
  • Publication number: 20130127999
    Abstract: According to one embodiment, an apparatus for calibrating a camera while a vehicle is moving includes a rearward monitoring camera mounted in a vehicle to acquire image information, a memory that stores a camera calibration program for computationally determining and calibrating mounting parameters of the camera while the vehicle is moving, using the image information acquired by the camera, a gear position detector to detect gear positions of the vehicle and generates position signals according to the gear positions and a control unit that receives the image information, and when the gear position detector detects a position signal for other than a reverse gear position, that reads out and executes the camera calibration program stored in the memory.
    Type: Application
    Filed: February 29, 2012
    Publication date: May 23, 2013
    Applicant: Toshiba Alpine Automotive Technology Corporation
    Inventor: Kiyoyuki KAWAI
  • Publication number: 20130107124
    Abstract: A motion vector computing device according to one embodiment includes: a difference computing unit that computes inter-frame temporal difference value It, uses horizontal direction inter-pixel difference value Ix and vertical direction inter-pixel difference value Iy in a same frame, the current frame signal and the different frame signals when the pixel moves for a small-time, a variance matrix generating unit computes the variances of the gradient in the horizontal direction, in the vertical direction and in the temporal direction of the luminance value on the basis of the difference values Ix, Iy and It, a coefficient computing unit computes a coefficient of a flat plane formula by calculating a formula for giving a minimum with regard to the square error of the flat plane formula approximating the distribution of luminance gradients of the pixel and a vector computing unit computes the motion vector uses the coefficient.
    Type: Application
    Filed: March 8, 2012
    Publication date: May 2, 2013
    Applicant: Toshiba Alpine Automotive Technology Corporation
    Inventors: Kiyoyuki KAWAI, Kenji Furukawa
  • Publication number: 20110298988
    Abstract: An apparatus for detecting a moving object includes: an image input unit that inputs a camera image; a motion vector generation unit that generates motion vectors of a plurality of points P in the image; an estimation unit that estimates rotational components of vehicle movement parameters as being equal to the inclination from each point P to a vanishing point when the inclination of the motion vector of each point P is corrected by the rotational components; and a determination unit that corrects the inclination of the motion vector of a given point Q in the image, and detects the existence of a moving object that moves in a direction different from the vehicle movement direction when the coincidence degree between the inclinations is low, while detects the existence of an object that radially moves toward the vanishing point when the coincidence degree of the inclinations is high.
    Type: Application
    Filed: April 26, 2011
    Publication date: December 8, 2011
    Applicant: TOSHIBA ALPINE AUTOMOTIVE TECHNOLOGY CORPORATION
    Inventor: KIYOYUKI KAWAI
  • Patent number: 7760773
    Abstract: A wavelength conversion laser apparatus including: a laser light source emitting primary wavelength light; a non-linear optical crystal including: a light waveguide region having a first refractivity, the light waveguide region receiving the primary wavelength light to output as secondary wavelength light; and a clad region adjacent to the light waveguide region, the clad region having a second refractivity lower than the first refractivity, wherein at least the light waveguide region has a periodically domain-inverted structure formed such that a domain-inverted period varies in a direction perpendicular to an incident axis of the primary wavelength light; and a mover moving the non-linear optical crystal to change the domain-inverted period on a path where the primary wavelength light incident on the light waveguide region passes.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: July 20, 2010
    Assignee: Samsung LED Co., Ltd.
    Inventors: Byung Jin Ma, Kiyoyuki Kawai, Hong Ki Kim
  • Publication number: 20100135345
    Abstract: A wavelength conversion laser device and a nonlinear optical crystal used in the same. The wavelength conversion laser device includes a laser light source for emitting a predetermined wavelength beam, and a laser medium for exciting the predetermined wavelength beam from the laser light source into a fundamental beam. The wavelength conversion laser device further includes a nonlinear optical crystal composed of a KTiOPO4 (KTP) crystal having b-c crystal plane as an incident surface of the fundamental beam to provide type II phase matching conditions. The KTP crystal converts the fundamental wavelength beam into a second harmonic generation beam.
    Type: Application
    Filed: February 3, 2010
    Publication date: June 3, 2010
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Hong Ki Kim, Kiyoyuki Kawai, Yu Seung Kim
  • Patent number: 7717079
    Abstract: An engine includes: a cylinder block; and a piston ring, in which the cylinder block has a cylinder liner portion formed of an aluminum-based composite reinforced by a ceramic containing at least either of a silicon carbide and an alumina, and in which the piston ring is coated with a nitride film (20) including a vanadium nitride layer (21) exposed on an outer circumferential sliding surface (17).
    Type: Grant
    Filed: July 20, 2007
    Date of Patent: May 18, 2010
    Assignees: Honda Motor Co., Ltd., Teikoku Piston Ring CO., Ltd.
    Inventors: Satoshi Yamamura, Kazuo Shibata, Kiyoyuki Kawai
  • Publication number: 20090020082
    Abstract: In a hollow valve for an internal combustion engine, including a stem portion, an umbrella portion provided at one end of the stem portion, a gastight cavity that communicates the interior of the stem portion with that of the umbrella portion, and a coolant contained in the cavity, the umbrella portion has a wall portion (a lower cap) having a combustion-chamber-side wall that forms a part of a wall of a combustion chamber of the engine, and a cavity-side wall that forms a part of a wall of the cavity, and at least one high-thermal-conductivity member is provided on the cavity-side wall, for conduction of heat between the wall portion and one of at least the coolant and the stem portion as a heat-conduction medium.
    Type: Application
    Filed: July 2, 2008
    Publication date: January 22, 2009
    Inventors: Takao Suzuki, Kiyoyuki Kawai, Masao Ishida, Kenichi Aoyagi, Toru Desaki
  • Publication number: 20090009594
    Abstract: Three-dimensional representation apparatus are disclosed. In one implementation, the three-dimensional representation apparatus includes a first two-dimensional picture forming device configured to form a first two-dimensional picture and a second two-dimensional picture forming device configured to form a second two-dimensional picture. The luminance of the first and second two-dimensional pictures may be individually adjusted. The first and second two-dimensional picture forming devices are positioned to be out of light paths for projecting the two-dimensional pictures formed by the other two-dimensional picture forming device. The three-dimensional representation apparatus may also include a focal distance adjustment optical element configured to adjust focal distances for each of the first and second two-dimensional pictures differently.
    Type: Application
    Filed: June 27, 2008
    Publication date: January 8, 2009
    Inventor: Kiyoyuki Kawai
  • Patent number: 7447244
    Abstract: A wavelength conversion laser device includes a laser light source for emitting a first wavelength light, a nonlinear optical crystal for converting the first wavelength light into a second wavelength light, and a nonlinear optical crystal rotator for rotating the nonlinear optical crystal so as to change an incident angle of the first wavelength light into the nonlinear optical crystal. The device also includes a nonlinear optical crystal rotation driving controller for controlling a rotation amount of the rotator in accordance with an output change of the second wavelength light so that the nonlinear optical crystal has phase matching with the first wavelength light. The device further includes a light exit position adjustor for compensating an exit position change of the second wavelength light in accordance with the incident angle change of the first wavelength light so that the second wavelength light is outputted in a predetermined exit position.
    Type: Grant
    Filed: June 13, 2007
    Date of Patent: November 4, 2008
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Byung Jin Ma, Kiyoyuki Kawai
  • Patent number: 7443892
    Abstract: In a wavelength conversion laser device, a laser light source emits first wavelength light. A non-linear optical crystal converts the first wavelength light into second wavelength light. A rotational driver rotates the non-linear optical crystal so as to alter an incidence angle of the first wavelength light with respect to the non-linear optical crystal. A rotational driving controller detects a portion of an output of the second wavelength light, generates a rotational control signal of the non-linear optical crystal in accordance with a change in the output, and transmits the rotational control signal to the rotational driver. A beam location maintaining mirror retroreflects the second wavelength light, outputted from the non-linear optical crystal, along a substantially same path as that of the first wavelength light. Also, an output beam distributor guides the retroreflected second wavelength light in a desired output direction.
    Type: Grant
    Filed: June 13, 2007
    Date of Patent: October 28, 2008
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Byung Jin Ma, Kiyoyuki Kawai
  • Publication number: 20080107141
    Abstract: A wavelength conversion laser apparatus including: a laser light source emitting primary wavelength light; a non-linear optical crystal including: a light waveguide region having a first refractivity, the light waveguide region receiving the primary wavelength light to output as secondary wavelength light; and a clad region adjacent to the light waveguide region, the clad region having a second refractivity lower than the first refractivity, wherein at least the light waveguide region has a periodically domain-inverted structure formed such that a domain-inverted period varies in a direction perpendicular to an incident axis of the primary wavelength light; and a mover moving the non-linear optical crystal to change the domain-inverted period on a path where the primary wavelength light incident on the light waveguide region passes.
    Type: Application
    Filed: October 29, 2007
    Publication date: May 8, 2008
    Inventors: Byung Jin Ma, Kiyoyuki Kawai, Hong Ki Kim
  • Publication number: 20080056312
    Abstract: A wavelength conversion laser device and a nonlinear optical crystal used in the same. The wavelength conversion laser device includes a laser light source for emitting a predetermined wavelength beam, and a laser medium for exciting the predetermined wavelength beam from the laser light source into a fundamental beam. The wavelength conversion laser device further includes a nonlinear optical crystal composed of a KTiOPO4 (KTP) crystal having b-c crystal plane as an incident surface of the fundamental beam to provide type II phase matching conditions. The KTP crystal converts the fundamental wavelength beam into a second harmonic generation beam.
    Type: Application
    Filed: June 15, 2007
    Publication date: March 6, 2008
    Inventors: Hong Ki Kim, Kiyoyuki Kawai, Yu Seung Kim