Patents Assigned to NGK Spark Plug Co., Ltd.
  • Publication number: 20200003723
    Abstract: A gas sensor including a detection element section (71) including a solid electrolyte body and a pair of electrodes disposed on the solid electrolyte body, and a heater (73) for heating the detection element section (71). Inherent characteristic information is recorded in a record section (170) provided on the gas sensor or a record section provided separately from the gas sensor. The inherent characteristic information is information specific to the detection element section (71) and which allows setting of a relation between a change in the temperature of the detection element section (71) and a change in the internal resistance between the pair of electrodes.
    Type: Application
    Filed: June 19, 2019
    Publication date: January 2, 2020
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Kentaro KAMADA, Hitoshi FURUTA
  • Publication number: 20200006788
    Abstract: An electrochemical reaction unit including a unit cell, a cathode-side member, and an anode-side member. The sum La of the distance Lai between a virtual straight line representing a center position of the unit cell and the midpoint between opposite end points of a cathode-side supply opening group and the distance Lao between the virtual straight line and the midpoint between opposite end points of a cathode-side discharge opening group is smaller than the sum Lf of the distance Lfi between the virtual straight line and the midpoint between opposite end points of an anode-side supply opening group including an opening of an anode-side supply communication channel and the distance Lfo between the virtual straight line and the midpoint between opposite end points of an anode-side discharge opening group including an opening of an anode-side discharge communication channel.
    Type: Application
    Filed: December 7, 2017
    Publication date: January 2, 2020
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Takafumi SHICHIDA, Yuki OTA
  • Patent number: 10524365
    Abstract: A ceramic substrate includes a ceramic layer mainly formed of a glass ceramic and a conductor trace mainly formed of silver (Ag). In an adjacent region located adjacent to the conductor trace, the concentration of boron atoms (B) contained in the ceramic layer increases toward the conductor trace.
    Type: Grant
    Filed: January 8, 2016
    Date of Patent: December 31, 2019
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Tatsuya Katoh, Masanori Ito, Masaki Kutsuna
  • Patent number: 10520463
    Abstract: An insulating separator of a gas sensor is formed to be dividable into a forward separator having a terminal disposition hole, and a rear separator having four terminal disposition holes. The insulating separator has a ventilation path formed between the forward separator and the rear separator. As a result, moisture and the like which enter the insulating separator from a forward side of the forward separator through the terminal disposition hole can be discharged outward of the insulating separator through the ventilation path. As a result, corrosion of metal terminals caused by entry of moisture can be reduced, whereby transmission of a sensor signal and application of current or voltage through the metal terminals can be appropriately implemented.
    Type: Grant
    Filed: April 7, 2017
    Date of Patent: December 31, 2019
    Assignee: NGK Spark Plug Co., LTD.
    Inventors: Takehiro Oba, Shogo Nagata, Shunya Mihara
  • Patent number: 10522978
    Abstract: In an ignition plug, since a ground electrode is formed in a thin-rod-shape or a mesh-like shape, sufficiently strong radicals are locally generated by a barrier discharge, an anti-inflammation effect by the electrode is small, and the growth of a flame is hardly hindered. Furthermore, by making the thickness dimension of a second dielectric facing a discharge region uniform, the barrier discharge is spread over the surface of the second dielectric, the generation of the radicals is maintained, and combustibility after ignition is promoted. Furthermore, because an end portion of a high voltage electrode and a ground electrode are disposed to face each other within a combustion chamber, a fuel gas introduced into the combustion chamber is liable to flow into the discharge region, and is easily ignited by the radicals generated due to the discharge.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: December 31, 2019
    Assignees: Mitsubishi Electric Corporation, NGK SPARK PLUG CO., LTD.
    Inventors: Taichiro Tamida, Takahiro Inoue, Takashi Hashimoto, Akira Nakagawa, Tomokazu Sakashita, Takayoshi Nagai, Kimihiko Tanaya, Hiroyuki Kameda, Yuichi Yamada, Kenji Ban
  • Publication number: 20190393683
    Abstract: A tip is welded appropriately using an energy beam. The tip is welded to a base portion by irradiating the interface between the base portion and the tip with the energy beam. The welding the tip to the base portion includes: applying the energy beam continuously, while moving the irradiation position of the energy beam, in a first period of time; and applying the energy beam a plurality of times according to a pulsed output pattern, while moving the irradiation position of the energy beam, in a second period of time subsequent to the first period of time.
    Type: Application
    Filed: December 11, 2017
    Publication date: December 26, 2019
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Yusuke TENKUMO, Susumu IMAI
  • Publication number: 20190393682
    Abstract: A spark plug includes a metallic shell having a cylindrical trunk portion with a male screw formed on its outer circumferential surface and a seat portion located adjacent to the rear end of the trunk portion and projecting radially outward. The trunk portion has a first region and a second region. The first region extends, in the direction of the axial line, at least over a range extending from the rear end of the trunk portion to a first screw thread portion of the male screw as counted from the rear end of the male screw. The second region is located adjacent to the first region in the circumferential direction. The first region has a Vickers hardness higher than that of the second region.
    Type: Application
    Filed: June 19, 2019
    Publication date: December 26, 2019
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventor: Ryoki YAGI
  • Patent number: 10515836
    Abstract: This ceramic member 100 includes: a ceramic base body 10 having a terminal 30 embedded therein; a blind hole 11 formed in the ceramic base body 10 and causing the lower surface of the ceramic base body 10 and the terminal 30 to communicate with each other; and a connection member 40 inserted in the blind hole 11, the connection member 40 connected to the terminal 30 by means of a brazing material solidified portion 70. In the blind hole 11, the space surrounded by the inner peripheral surface of the blind hole 11 has, at least at a bottom face 11a, an enlarged portion 11b that is enlarged toward the upper side at least partially with respect to the circumferential direction, and at least a part of the brazing material solidified portion 70 is present in the enlarged portion 11b.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: December 24, 2019
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventor: Atsushi Tsuchida
  • Publication number: 20190386328
    Abstract: An electrochemical reaction single cell including an electrolyte layer containing Zr and at least one of Y, Sc, and Ca, an anode disposed on one side of the electrolyte layer, a cathode containing Sr and Co and disposed on the other side of the electrolyte layer, and an intermediate layer disposed between the electrolyte layer and the cathode. The electrochemical reaction single cell exhibits an interface contact ratio of 25.5% to 68.6%, wherein the interface contact ratio is the ratio of the sum of the lengths of portions containing neither SrZrO3 nor cavities of an interfacial surface of the intermediate layer on the electrolyte layer side to the total length of the interfacial surface. Also disclosed is an electrochemical reaction cell stack including a plurality of electrochemical reaction single cells, at least one of which is the above described electrochemical reaction single cell.
    Type: Application
    Filed: February 15, 2018
    Publication date: December 19, 2019
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Shiro INOUE, Yuko HISANO, Tatsuya ONO
  • Publication number: 20190383258
    Abstract: The present invention provides spark plug that can improve detection accuracy of pre-ignition caused by flame kernel occurring inside spark plug. Terminal is located at a rear end side with respect to thread portion of metal shell. Detector electrode is provided at a portion located at a top end side with respect to a top end of contact portion between reduced diameter portion and shelf portion or packing in a space formed between outer periphery of insulator and inner periphery of the metal shell. The detector electrode and the terminal are connected by conductor. The detector electrode and the conductor are insulated from center electrode, the metal shell and ground electrode. Since the detector electrode is located in the space between the outer periphery of the insulator and the inner periphery of the metal shell, an early detection of the flame kernel occurring in this space can be possible.
    Type: Application
    Filed: May 22, 2017
    Publication date: December 19, 2019
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Masaru KANO, Kiyoteru MORI, Tomohiro IWATSUKA, Yoshiki INOUE, Keita NAKAGAWA
  • Publication number: 20190386466
    Abstract: Spark plug has first and second electrodes. First electrode has tip principally made of noble metal and base material principally made of Ni. The tip is joined to the base material through fusion portion. Second electrode faces discharge surface of the tip. The fusion portion has overlap portion where first interface between the tip and the fusion portion and second interface between the base material and the fusion portion overlap in first direction perpendicular to the discharge surface. When viewing cross section which passes through a center of gravity of the overlap portion projected onto virtual surface parallel to the discharge surface and is perpendicular to the discharge surface, noble metal content is greater than 50 mass % at one end portion of the overlap portion in second direction extending along the discharge surface, and Ni content is greater than 50 mass % at the other end portion of the overlap portion.
    Type: Application
    Filed: May 31, 2019
    Publication date: December 19, 2019
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventor: Tomoki Kawai
  • Patent number: 10508801
    Abstract: The invention provides a fluorescent member which has high thermal conductivity and thus can prevent an increase in temperature of a phosphor layer and can maintain fluorescent performance even when irradiated with source light having a high intensity, and provides a light-emitting device having such a member. A reflection-type wavelength converting member 100 converts light with a specific wavelength to light with other wavelength and also reflects the light on a reflection surface to emit the light as illumination light. The wavelength converting member 100 includes a substrate 110 including an inorganic material, and a phosphor layer 120 disposed on the substrate 110 and including phosphor particles 122 that absorb light and emit converted light and a translucent ceramic 121 that binds the phosphor particles 122 to one another. The ratio of the thickness of the phosphor layer 120 to the average particle size of the phosphor particles 122 is less than 30.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: December 17, 2019
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Yumi Sato, Yoshifumi Tsutai, Takashi Abe, Yutaka Sato
  • Patent number: 10509009
    Abstract: A sensor control apparatus for a gas sensor which detects a particular gas component contained in a gas under measurement. In the case where humidity detection is performed using an electromotive-force-type gas sensor, a sensor control apparatus changes a target voltage of an electromotive force cell to a second target voltage for humidity detection and then to a third target voltage which is lower than a first target voltage which is a target voltage used for detecting the concentration of the particular gas component. In the case where humidity detection is performed using a limiting-current-type gas sensor, the sensor control apparatus changes the voltage applied to a pump cell to a second application voltage for humidity detection and then to a third application voltage which is lower than a first application voltage which is an application voltage used for detecting the concentration of the particular gas component.
    Type: Grant
    Filed: March 7, 2016
    Date of Patent: December 17, 2019
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Dai Nishijima, Satoshi Teramoto
  • Publication number: 20190376425
    Abstract: A NOx sensor control device is connected to a NOx sensor mounted in an internal combustion engine. The NOx sensor has a detection cell configured to detect a NOx concentration and having a solid electrolyte body and a pair of electrodes provided on a surface of the solid electrolyte body and a heater heating the detection cell. The NOx sensor control device has a heater control unit. The heater control unit is configured to, at a time when an operation of the internal combustion engine stops, perform a recovery control of the NOx sensor which is an electric current control of the heater for removing SOx adsorbed to the NOx sensor.
    Type: Application
    Filed: May 8, 2019
    Publication date: December 12, 2019
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Kenji KATO, Yuuya Nakayama, Hirotaka Onogi, Masao Tsuzuki, Takumi Nishiyama
  • Publication number: 20190379182
    Abstract: A first member and a second member are held by being sandwiched by first and second holders. By providing force, which brings N nails (N is an integer that is 2 or greater) of chucks closer to each other, to the N nails, each of L nails contacts the first member without contacting the second member and each of M nails contacts the second member without contacting the first member. By separating the second holder from the second member, the N nails get even closer to each other, and the second member is moved relative to the first member, then a relative position of the first and second members is adjusted. By making the second holder contact with the second member again, the first and second members are held. After removing the chucks from the first and second members, a contact portion of the first and second members is laser-welded.
    Type: Application
    Filed: May 21, 2019
    Publication date: December 12, 2019
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventor: Hiroshi Ichihara
  • Patent number: 10502114
    Abstract: A concentration calculation apparatus, system and method which can compute a correction value for correcting an ammonia sensor output at a timing other than the time of fuel cut. A multi-gas sensor control apparatus (9) of a urea SCR system (1) begins recording (storing) a downstream NOx output value Sn and downstream ammonia output value Sa detected by a multi-gas sensor (8) (S120) when the control apparatus determines that a DPF regeneration process is currently being performed (an affirmative determination in S110). The apparatus (9) computes a downstream ammonia converted value Ca using a peak value of the downstream NOx output value Sn (S170), and calculates a Gain correction coefficient based on a comparison of the downstream converted value Ca and the output value Sa (S180). As a result, the Gain correction coefficient can be computed in accordance with the state of the ammonia detection section (202).
    Type: Grant
    Filed: October 19, 2017
    Date of Patent: December 10, 2019
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Yoshihiro Nakano, Yoshinori Hibino
  • Publication number: 20190372247
    Abstract: A circuit connection device having one or a plurality of terminals, circuit board, tubular case body, terminal inserting portion and insulating first and second retainers. The terminal(s) are electrically connected to the circuit board. The case body accommodates the circuit board and has an opening at its one end. The terminal inserting portion has one or a plurality of penetration holes and closes the opening of the case body. The first and second retainers are accommodated in the case body. The terminal(s) are inserted into the penetration hole(s). The first retainer has terminal retaining portion retaining terminal(s). The second retainer has a positioning portion maintaining a position relationship with the circuit board, and is engaged with the first retainer. The first and second retainers are configured so that movement of the terminal(s) is restrained and the terminal(s) are connected to the circuit board.
    Type: Application
    Filed: January 19, 2018
    Publication date: December 5, 2019
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Hidekazu MINAMI, Takashi KODA, Shingo YOSHIDA
  • Publication number: 20190372313
    Abstract: A spark plug electrode wearing rate estimating method for a spark plug in which spark discharge occurs between two electrodes by application of voltage generated by an ignition coil, includes the step of estimating a wearing rate of a first electrode in one spark discharge based on a temperature of the first electrode, and a spark discharge voltage and supply energy from the ignition coil. The first electrode contains any one of Ir, Ru, W, and Ni as a main component.
    Type: Application
    Filed: May 23, 2019
    Publication date: December 5, 2019
    Applicant: NGK Spark Plug Co., LTD.
    Inventor: Takahiro KARUMI
  • Publication number: 20190372144
    Abstract: An electrochemical reaction single cell including an electrolyte layer containing Zr and at least one of Y, Sc, and Ca, an anode disposed on one side of the electrolyte layer, a cathode containing Sr and Co and disposed on the other side of the electrolyte layer, and an intermediate layer disposed between the electrolyte layer and the cathode. In the electrochemical reaction single cell, an SrZrO3 integrated value calculated by a predetermined method is 600 to 10,300. Also disclosed is an electrochemical reaction cell stack including a plurality of electrochemical reaction single cells.
    Type: Application
    Filed: November 15, 2017
    Publication date: December 5, 2019
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Shiro INOUE, Makoto KURIBAYASHI, Tatsuya ONO
  • Patent number: 10497949
    Abstract: An electrochemical reaction unit including a unit cell; a separator bonded to a peripheral portion of the unit cell by means of a bonding member containing a brazing material; and a glass sealing member which is in contact with both the surface of the separator and the surface of the unit cell, thereby sealing between an air chamber and a fuel chamber. The separator has a first flat portion approximately parallel to a second direction perpendicular to a first direction; a second flat portion approximately parallel to the second direction; and a connection portion having a portion whose position in the first direction is different from that of the first flat portion and the second flat portion and connecting the first flat portion and the second flat portion.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: December 3, 2019
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Shunta Ohashi, Nobuyuki Hotta, Hiroaki Yagi