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.