公开(公告)号：US20210270200A9

公开(公告)日：2021-09-02

申请号：US16860361

申请日：2020-04-28

Applicant: DENSO CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Toru TAKEUCHI ,  Tomotaka MORI ,  Shota IMADA ,  Yoshiharu MIYAKE ,  Hiroki NISHIJIMA ,  Haruki KONDO ,  Yasushi HIRATA

IPC: F02D41/14 ,  G01N27/407

Abstract: A gas sensor includes a sensor element body having a porous layer provided on an outer surface, and a power supply device which supplies power to a heater element that is in the sensor element body. The amount of power being applied to the heater element by the power supply device when gas detection is being performed by the gas sensor in a steady state is designated as P [W], the volume of the length range of a heating region of the heater element provided in the sensor element body as V [mm3], and the applied power density as X [W/mm3], where X is a value expressed by P/V. In that case, the following relationship is satisfied between the applied power density X and the average thickness Y [μm] of the porous layer: Y≥509.32−2884.89X+5014.12X2

公开(公告)号：US20240418672A1

公开(公告)日：2024-12-19

申请号：US18816329

申请日：2024-08-27

Applicant: DENSO CORPORATION

Inventor： Shota IMADA ,  Takumi USHIKUBO

IPC: G01N27/407 ,  G01N27/406

Abstract: A sensor element includes a gas sensor that includes a solid electrolyte body, a heater, and a protective layer. The protective layer covers a detection tip end portion of the sensor element and has a porosity of equal to or greater than 25%. The protective layer includes a shielding side portion and a heater side portion. The shielding side portion is a planar portion on a side of the protective layer on which the solid electrolyte body is positioned in an opposing direction of the solid electrolyte body and the heater. The heater side portion is a planar portion on a side of the protective layer on which the heater is positioned in the opposing direction. A thickness of the shielding side portion is greater than a thickness of the heater side portion.

公开(公告)号：US20200256270A1

公开(公告)日：2020-08-13

申请号：US16860361

申请日：2020-04-28

Applicant: DENSO CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Toru TAKEUCHI ,  Tomotaka MORI ,  Shota IMADA ,  Yoshiharu MIYAKE ,  Hiroki NISHIJIMA ,  Haruki KONDO ,  Yasushi HIRATA

IPC: F02D41/14 ,  G01N27/407

Abstract: A gas sensor includes a sensor element body having a porous layer provided on an outer surface, and a power supply device which supplies power to a heater element that is in the sensor element body. The amount of power being applied to the heater element by the power supply device when gas detection is being performed by the gas sensor in a steady state is designated as P [W], the volume of the length range of a heating region of the heater element provided in the sensor element body as V [mm3], and the applied power density as X [W/mm3], where X is a value expressed by P/V. In that case, the following relationship is satisfied between the applied power density X and the average thickness Y [μm] of the porous layer: Y≥509.32−2884.89X+5014.12X2

公开(公告)号：US20200173957A1

公开(公告)日：2020-06-04

申请号：US16786082

申请日：2020-02-10

Applicant: DENSO CORPORATION

Inventor： Tomotaka MOURI ,  Shota IMADA ,  Toru TAKEUCHI

IPC: G01N27/407 ,  G01N27/409 ,  G01N27/406

Abstract: A gas sensor element for detecting a specific gas component in a measured gas, comprising: an element body in the form of a long plate having a gas detection part at an end thereof on a distal end face side in a longitudinal direction; and a porous protective layer covering an outer periphery of the end on said end face side of the element body, wherein in a cross section including two adjacent ones of the end face and side faces connected to the end face, an outer surface of the protective layer facing an element corner where the two faces meet has a shape with a corner part, and a ratio of an assumed diameter of a water droplet contained in the measured gas in a use environment to an effective length of the corner part in the cross section is equal to or larger than 1.5.

公开(公告)号：US20220113276A1

公开(公告)日：2022-04-14

申请号：US17557853

申请日：2021-12-21

Applicant: DENSO CORPORATION

Inventor： Shota IMADA ,  Satoshi SUZUKI ,  Takumi USHIKUBO

IPC: G01N27/406 ,  G01N27/409 ,  G01N27/407

Abstract: The sensor element of a gas sensor includes an element body, a surface protective layer provided at the outermost surface position of a tip portion of the element body, in the longitudinal direction of the element body, and an internal protective layer provided between the surface protective layer and the element body. The internal protective layer has a lower thermal conductivity and a higher average porosity than the surface protective layer, and is disposed between the surface protective layer and the element body. In the internal protective layer, a first protective layer portion of the internal protective layer is located on a side that faces the heater, and at least the base position is positioned closer in the longitudinal direction to the tip end of the element body than is the maximum temperature position on the element body.

公开(公告)号：US20200182182A1

公开(公告)日：2020-06-11

申请号：US16786135

申请日：2020-02-10

Applicant: DENSO CORPORATION

Inventor： Shota IMADA ,  Tomotaka MOURI ,  Toru TAKEUCHI

IPC: F02D41/14 ,  G01N33/00

Abstract: A gas sensor element comprising a long plate-like element body and a porous protective layer protecting a surface of the element body, wherein the element body has a gas detection part at an end thereof on one end face side in a longitudinal direction, and the protective layer includes an end face part covering the one end face in laminate, side face parts covering side faces connected to the one end face in laminate, and corner parts where two adjacent ones of the end face part and the side face parts meet. An outer surface of one or more of the end face part and the side face parts has a concave shape that is smoothly continuous with the corner parts and configured such that a layer thickness increases toward the corner parts.

公开(公告)号：US20200049653A1

公开(公告)日：2020-02-13

申请号：US16656959

申请日：2019-10-18

Applicant: DENSO CORPORATION

Inventor： Makoto NAKAE ,  Shota IMADA

IPC: G01N27/407 ,  G01N33/00 ,  G01N27/409 ,  G01N27/41 ,  B01D53/94 ,  F01N3/10 ,  F01N11/00

Abstract: A gas sensor includes a sensor element, and the sensor element includes a bottomed tubular solid electrolyte, a detection electrode provided on an outer surface of the solid electrolyte, a reference electrode provided on an inner surface of the solid electrolyte. The detection electrode of the sensor element includes a detection electrode section provided at a position on a tip side of an axial direction, an attachment electrode section provided at a position on a base end side of the axial direction, and a lead electrode section provided at a position where the detection electrode section is connected to the attachment electrode section. An insulating layer is provided between a tube of the solid electrolyte and each of the attachment electrode section and the lead electrode section.

公开(公告)号：US20160254651A1

公开(公告)日：2016-09-01

申请号：US15053256

申请日：2016-02-25

Applicant: DENSO CORPORATION

Inventor： Shota IMADA ,  Hirofumi SUZUKI ,  Hiroshi ARAKI

IPC: H01T13/38 ,  C03C10/00

CPC classification number: H01T13/38 ,  C04B35/00 ,  C04B35/111 ,  C04B35/117 ,  C04B2235/3201 ,  C04B2235/3206 ,  C04B2235/3208 ,  C04B2235/3222 ,  C04B2235/3418 ,  C04B2235/3472 ,  C04B2235/3481 ,  C04B2235/5409 ,  C04B2235/80 ,  C04B2235/9669

Abstract: An alumina sintered body has a main phase made of alumina crystals, a first dispersed phase made of MgAl2O4 dispersed in the main phase, and a second dispersed phase made of SiO2 and/or CaO dispersed in the main phase. A content ratio of the main phase is within a range from not less than 98% to less than 98%. The alumina sintered body satisfies a relationship of 100×I2/I1≧5.5%, where I1 indicates a maximum peak height intensity derived from alumina, and I2 indicates a maximum peak height intensity derived from MgAl2O4 in a X-ray diffraction of the alumina sintered body. An area ratio of the second dispersed phase on a surface of the alumina sintered body is not more than 15.2%. A spark plug has a central electrode, a ground electrode and an insulator made of the alumina sintered body having the specific features previously described.

Abstract translation: 氧化铝烧结体具有由氧化铝晶体制成的主相，分散在主相中的分散在MgAl 2 O 4中的第一分散相和分散在主相中的SiO 2和/或CaO制成的第二分散相。 主相的含有率在98％以上且小于98％的范围内。 氧化铝烧结体满足100×I2 /I1≥5.5％的关系，其中I1表示由氧化铝衍生的最大峰高强度，I2表示在氧化铝烧结体的X射线衍射中来自MgAl 2 O 4的最大峰高强度 身体。 第二分散相在氧化铝烧结体表面的面积比不大于15.2％。 火花塞具有中心电极，接地电极和由具有前述具体特征的氧化铝烧结体制成的绝缘体。

公开(公告)号：US20160023953A1

公开(公告)日：2016-01-28

申请号：US14807134

申请日：2015-07-23

Applicant: DENSO CORPORATION

Inventor： Shota IMADA

IPC: C04B35/10 ,  H01T13/38

CPC classification number: C04B35/10 ,  C04B35/117 ,  C04B35/62685 ,  C04B2235/3206 ,  C04B2235/3217 ,  C04B2235/322 ,  C04B2235/3222 ,  C04B2235/3418 ,  C04B2235/3445 ,  C04B2235/3481 ,  C04B2235/5436 ,  C04B2235/5445 ,  C04B2235/785 ,  C04B2235/786 ,  C04B2235/85 ,  H01T13/08 ,  H01T13/38

Abstract: An alumina sintered body contains a main phase consisting of alumina crystal, and crystalline phases dispersed in the main phase. The crystalline phases consist of at least one selected from a group consisting of MgAl2O4, 2MgO.2Al2O3.5SiO2, 2MgO.SiO2 and MgO.SiO2. The average grain size of the crystalline phases is 0.4 μm to 5.3 μm. In an arbitrary area having a size of 100 μm×100 μm in a cross-section of the alumina sintered body,the number of the crystalline phases having grain sizes 1 μm to 5 μm is 8 to 412.

Abstract translation: 氧化铝烧结体包含由氧化铝晶体组成的主相和分散在主相中的结晶相。 结晶相由选自MgAl 2 O 4，2MgO 2 Al 2 O 3·5SiO 2，2MgO·SiO 2和MgO·SiO 2中的至少一种组成。 结晶相的平均晶粒尺寸为0.4μm〜5.3μm。 在氧化铝烧结体的截面中的尺寸为100μm×100μm的任意区域中，晶粒尺寸1μm〜5μm的结晶相数为8〜412。