公开(公告)号：US20230273149A1

公开(公告)日：2023-08-31

申请号：US18013312

申请日：2021-04-22

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Kunihiko YONEZU ,  Yuji SHIMAZAKI ,  Masayuki YOSHIDA

IPC: G01N27/407 ,  G01M15/10

CPC classification number: G01N27/4077 ,  G01M15/102

Abstract: A gas sensor 1 comprising: a sensor element 21; a metallic shell 11; and a single-wall tubular protector 51, wherein the protector has a gas introduction hole 56 and a gas discharge hole 53 disposed on a forward end side in relation to the gas introduction hole; the metallic shell has a fixing portion 13 whose outer surface is fixed to a pipe 100, and a larger-diameter tool engagement portion 14 located on a rear end side of the fixing portion and used to attach the gas sensor; a distance L1 in the axial O direction between the gas introduction hole and the gas discharge hole is greater than a distance L2 in the axial direction between the tool engagement portion and the gas introduction hole; and a forward end 21a of the sensor element is located on the forward end side in relation to the gas introduction hole.

公开(公告)号：US20230119530A1

公开(公告)日：2023-04-20

申请号：US17905219

申请日：2021-04-22

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Kunihiko YONEZU ,  Yuji SHIMAZAKI ,  Masayuki YOSHIDA

IPC: G01N27/407 ,  G01N33/00

Abstract: A gas sensor (1) including: a sensor element (21) having a detection section (22) through an element introduction hole (25); a metallic shell (11); and a single-wall tubular protector (51) having a gas introduction hole (56) and a gas discharge hole (53); a gap G is present between the gas introduction hole and a forwardly facing surface (12a) of the metallic shell; when the gas introduction hole is viewed toward the rear end side, an area Sh of a portion of the forwardly facing surface seen through the gas introduction hole, is equal to or greater than ½ of an opening area Sg of the gas introduction hole; the element introduction hole is located on the forward end side in relation to a forwardmost end (12f) of the forwardly facing surface; and a distance L1 of the gap G is smaller than a diameter D of the gas introduction hole.

公开(公告)号：US20190178861A1

公开(公告)日：2019-06-13

申请号：US16214344

申请日：2018-12-10

Applicant: NGK SPARK PLUG CO., LTD

Inventor： Yuji SHIMAZAKI ,  Hironari FURUTA ,  Kentaro MORI

IPC: G01N33/00

Abstract: A gas sensor includes a sensing element, a metal shell that is tubular and that surrounds the sensing element, and a protector made of a metal and fixed to the metal shell. A back end portion of the protector is joined to an outer surface of the metal shell to form a joined portion. A coefficient of thermal expansion of a material of the protector at 800 degrees Celsius is higher than a coefficient of thermal expansion of a material of the metal shell at 800 degrees Celsius. In a cross section of a portion of the gas sensor including the joined portion, a minimum distance t1 between the outer surface of the metal shell and an outer surface of the protector and a minimum distance t2 between the outer surface of the metal shell and an inner surface of the metal shell satisfy 0.6≤(t1/t2)≤2.0.

公开(公告)号：US20130327121A1

公开(公告)日：2013-12-12

申请号：US13914840

申请日：2013-06-11

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Yuji SHIMAZAKI ,  Yasuhiro Fujita ,  Takayoshi Atsumi

IPC: G01N33/00

CPC classification number: G01N33/0009 ,  G01N27/4077

Abstract: A protector has a two-stage structure that includes a large-diameter portion and a small-diameter portion. The large-diameter portion includes a cylindrical first peripheral wall and a first front end wall. The small-diameter portion includes a cylindrical second peripheral wall connected to the first front end wall and a second front end wall connected to a front end portion of the second peripheral wall. Opening portions are not formed in the first and second peripheral walls. First opening portions, which are opened toward only first recessed portions and an inner surface of the first peripheral wall, are formed at the first front end wall. A second recessed portion and second opening portions, which are formed in the second recessed portion and are opened toward an inner surface of the second peripheral wall, are formed in the second front end wall.

Abstract translation: 保护器具有包括大直径部分和小直径部分的两级结构。 大直径部分包括圆柱形第一周边壁和第一前端壁。 小直径部分包括连接到第一前端壁的圆柱形第二周壁和连接到第二周壁的前端部分的第二前端壁。 开口部不形成在第一周壁和第二周壁上。 在第一前端壁处形成有仅向第一凹部开口的开口部和第一周壁的内表面。 形成在第二凹部中并朝向第二周壁的内表面打开的第二凹部和第二开口部形成在第二前端壁中。