公开(公告)号：US20200271040A1

公开(公告)日：2020-08-27

申请号：US16749598

申请日：2020-01-22

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Kouji OGAWA ,  Ayaka OTA ,  Hideya INUKAI ,  Yasuhiro ISHIGURO

IPC: F01N11/00

Abstract: A sensor including a sensor element, a metallic shell, a terminal fitting, a cylindrical case, lead wires, a connector portion, and a cylindrical heat shield tube. The heat shield tube includes a first tube and a second tube. The second tube is disposed on a distal end side of the first tube and covers an outer surface of the rear end side of the case, while providing an overlapping portion that overlaps the first tube. A rear end side of the first tube is adjacent to the connector portion. A total length T of the heat shield tube and a length S of the overlapping portion satisfy T/10≤S ≤T/5. Further, a length L1 of the first tube and a length L2 of the second tube satisfy T/2≤L2