公开(公告)号：US11005236B2

公开(公告)日：2021-05-11

申请号：US16835488

申请日：2020-03-31

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Tatsuya Gozawa

IPC: H01T13/06 ,  H01T13/08 ,  H01T13/20

Abstract: A spark plug wherein the occurrence of cracks at a joint portion between a cover portion and a metal shell in the spark plug is prevented. The spark plug includes a cylindrical metal shell that accommodates an insulator therein, and a cover portion that covers, from a front end side of the spark plug, a front end portion of a center electrode and a facing portion of a ground electrode to form a pre-chamber space. The cover portion is joined to a front end side of the metal shell and has injection holes that are through-holes. A first coefficient of thermal expansion A (10−5/K) of the material forming the cover portion at normal temperature and a second coefficient of thermal expansion B (10−5/K) of the metal shell at normal temperature satisfy a formula (1): A

公开(公告)号：US10983085B2

公开(公告)日：2021-04-20

申请号：US16050787

申请日：2018-07-31

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Yusuke Matsukura ,  Shoji Kitanoya ,  Masaya Watanabe ,  Daisuke Ichikawa ,  Masahiro Yamashita

IPC: G01N27/407 ,  G01N33/00 ,  G01N27/16

Abstract: Disclosed is a gas sensor for detecting a measurement target gas in a measurement gas atmosphere, including: a first sensor element; a first installation part defining a first inner space in which the first sensor element is installed; and a casing accommodating therein the first installation part. The casing has an opening formed to introduce the measurement target gas into an inside of the casing. The first installation part has: a first gas introduction hole formed to provide communication between the first inner space and the inside of the casing; and a membrane member arranged to cover the first gas introduction hole and having permeability to water vapor and substantially no permeability to the measurement target gas. At least a portion of the first installation part in contact with the membrane member is made of insulating ceramic material or resin material.

公开(公告)号：US10978635B2

公开(公告)日：2021-04-13

申请号：US15766907

申请日：2016-10-07

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Kiyohito Shibata ,  Norifumi Iwaki ,  Toru Ezaki ,  Toshikatsu Nomura

IPC: H01L41/107 ,  H01L41/047 ,  H01L41/09 ,  H01L41/27

Abstract: A multilayer piezoelectric element that expands and contracts in response to an applied voltage includes external electrodes disposed on surfaces of an element body, internal electrodes connected to the external electrodes, and piezoelectric layers laminated alternately with the internal electrodes. An electrode material used for the internal electrodes or the external electrodes contains a base material composed of Ag and Pd in a weight ratio of 60/40 to 85/15 and Pt in an amount of 0.1% to 10% by weight based on the weight of the base material. Also included is a piezoelectric actuator including the piezoelectric element and a piezoelectric transformer including the piezoelectric element.

公开(公告)号：US10968881B2

公开(公告)日：2021-04-06

申请号：US16330528

申请日：2017-05-22

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Masaru Kano ,  Kiyoteru Mori ,  Tomohiro Iwatsuka ,  Yoshiki Inoue ,  Keita Nakagawa

IPC: F02P17/12 ,  G01N27/626 ,  H01T13/20

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.

公开(公告)号：US20210079828A1

公开(公告)日：2021-03-18

申请号：US17016722

申请日：2020-09-10

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Yoshihiro NAKANO ,  Kimihiro KOHAMA

IPC: F01N11/00 ,  G01N33/00 ,  F02D41/14 ,  G01N27/409 ,  G01N27/41 ,  G01N27/407

Abstract: A gas sensor control apparatus (300) including a control section (61) which executes a first receiving process (STEP 1) for receiving a first detection result output from a mixed-potential-type ammonia detection section (42) for detecting ammonia contained in a gas under measurement and corresponding to the concentration of ammonia, a second receiving process (STEP 1) for receiving a second detection result output from an oxygen detection section (2) for detecting oxygen contained in the gas under measurement and corresponding to the concentration of oxygen, a first concentration calculation process (STEP 3) for calculating a first ammonia concentration of the gas under measurement based on the first detection result and the second detection result, and a pressure correction process (STEP 6) for correcting the first ammonia concentration based on pressure information obtained from an external device (220), thereby obtaining a second ammonia concentration of the gas under measurement.

公开(公告)号：US10945312B2

公开(公告)日：2021-03-09

申请号：US15718218

申请日：2017-09-28

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Jun Kurano

IPC: H05B3/22 ,  H05B3/06 ,  H05B3/03

Abstract: A heating device includes a holding member and having thereinside a plurality of resistive heating elements connected to different pairs of electrode terminals, and a columnar support member joined to the holding member. A first resistive heating element is disposed throughout a first region including a region that overlaps the columnar support member as viewed from the first direction and a second region that is located around an outer periphery of the first region and that does not overlap the columnar support member as viewed from the first direction. A second resistive heating element is disposed throughout the first region and the second region, and an amount of heat generated by the second resistive heating element per unit area of the first region is larger than an amount of heat generated by the second resistive heating element per unit area of the second region.

公开(公告)号：US20210057152A1

公开(公告)日：2021-02-25

申请号：US16963301

申请日：2019-03-28

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Takayuki MIYAJI

IPC: H01G2/10 ,  H01G2/06

Abstract: Package 1a has ceramic substrate body 2 having front and back surfaces 3, 4 and side surface 5 between these surfaces, cavity 6 opening on front surface 3 and having bottom surface 7 and inner side surface 8, electrode pad 9 formed on bottom surface 7, external connecting terminal 10 formed on back surface 4, electronic component 14 mounted on electrode pad 9 and electrolyte 16 filling cavity 6. Electrode pad 9 and external connecting terminal 10 are electrically connected to each other through via conductor 12 penetrating ceramic layer c1 forming bottom surface 7 of cavity 6 and back surface 4 of substrate body 2. Side surface conductor 17 is provided on side surface 5 of substrate body 2, and side surface conductor 17 and external connecting terminal 10 are connected to each other. Electrode pad 9 and side surface conductor 17 are separate from each other.

公开(公告)号：US10928357B2

公开(公告)日：2021-02-23

申请号：US16137172

申请日：2018-09-20

Applicant: NGK Spark Plug Co., LTD.

Inventor： Yuzo Higuchi

IPC: G01N27/417 ,  G01N27/406 ,  G01N27/409 ,  G01N27/41 ,  G01N27/419

Abstract: A sensor control apparatus includes a current control section, a first condition judgment section, a second condition judgment section, a deterioration detection energization section, and a deterioration voltage detection section. The current control section controls pump current such that electromotive force cell voltage becomes equal to a control target voltage. The first condition judgment section judges whether or not a first deterioration detection condition is satisfied. The second condition judgment section judges whether or not a second deterioration detection condition is satisfied when the first deterioration detection condition is satisfied. The deterioration detection energization section supplies deterioration detection current to the oxygen concentration detection cell when the second deterioration detection condition is satisfied. The deterioration voltage detection section detects a deterioration detection voltage generated in the oxygen concentration detection cell after a deterioration detection time following the supply of the deterioration detection current has been started.

公开(公告)号：US10920700B2

公开(公告)日：2021-02-16

申请号：US16141480

申请日：2018-09-25

Applicant: NGK Spark Plug Co., LTD.

Inventor： Yoshihiro Nakano

IPC: G01N27/407 ,  F02D41/14 ,  G01N27/409 ,  G01N27/406 ,  G01N27/417 ,  F02D41/04

Abstract: A sensor control apparatus supplies a constant current to an oxygen concentration detection cell when it judges that oxygen concentration is greater than 15% (the concentration of oxygen contained in a measurement chamber is high). The sensor control apparatus detects a first difference voltage generated in the oxygen concentration detection cell as a result of the flow of the constant current to the oxygen concentration detection cell after a predetermined first detection time following the supply of the constant current. The sensor control apparatus detects a second difference voltage generated in the oxygen concentration detection cell as a result of the flow of the constant current to the oxygen concentration detection cell after a second detection time, which is previously set to be longer than the first detection time, following the supply of the constant current.

公开(公告)号：US10908116B2

公开(公告)日：2021-02-02

申请号：US16165295

申请日：2018-10-19

Applicant: NGK Spark Plug Co., LTD.

Inventor： Tomoki Fujii ,  Takehiro Oba

IPC: G01N27/407

Abstract: In a circular cross section obtained by cutting a protector along a plane which is orthogonal to an axial direction and passes through gas introduction holes, the gas introduction holes are arranged asymmetrically in the circumferential direction of a circumferential wall of the protector. When the circular cross section is bisected into first and second divisional regions by a straight line which passes through the center of the circular cross section and does not pass through any gas introduction holes, the total opening area of gas introduction holes located in the first divisional region is smaller than the total opening area of gas introduction holes located in the second divisional region.