公开(公告)号：US20210132016A1

公开(公告)日：2021-05-06

申请号：US17075110

申请日：2020-10-20

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Daisuke MATSUYAMA ,  Masahiro ASAI ,  Masashi NOMURA ,  Yuto INOSE ,  Takehiro Oba

IPC: G01N33/00

Abstract: A gas sensor includes a gas sensor element for detecting the concentration of a specific gas in a gas under measurement, a tubular housing having an opening, a sealing member closing the opening, and a heat dissipating member having a rear end located at the same position or forward of the rear end of the housing. The heat dissipating member reduces heat transferred from the forward end side of the gas sensor to the sealing member and includes a connection portion connected to the housing, and a main portion extending rearward from the connection portion such that a gap is formed between the main portion and the housing. The main portion has heat dissipating openings for establishing communication between the gap and a space on the outer circumferential side of the heat dissipating member. The heat dissipating openings are formed on the rear end side of the main portion.

公开(公告)号：US20200292485A1

公开(公告)日：2020-09-17

申请号：US16804283

申请日：2020-02-28

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Daisuke MATSUYAMA ,  Masahiro ASAI ,  Masashi NOMURA ,  Yuto INOSE

IPC: G01N27/409 ,  G01N27/407 ,  G01N25/00 ,  F01N13/00

Abstract: A gas sensor (100) extending in an axial direction AX including: a gas sensor element (120) which detects the concentration of a specific gas in a gas under measurement; a tubular metallic shell (110) having a polygonal tool engagement portion (110B) surrounding the gas sensor element (120); a tubular outer tube (103) which extends rearward from the metallic shell (110), surrounds the gas sensor element (120), and has an opening (103E) at a rear end thereof; a sealing member (191) which seals the opening (103E); and a tubular heat dissipating member (104) which surrounds the outer tube (103) and reduces the amount of heat transferred from the forward end side of the gas sensor (100) through the outer tube (103) to the sealing member (191). The maximum diameter D1 of the heat dissipating member (104) is equal to or less than the opposite side dimension D2 of the tool engagement portion (110B).