Ngk Spark Plug Company, Limited

Mitsunori Oi

Tatsuya Suzuki

Go Hanzawa

Takeshi Morita

Takashi Maeda

Toshinori Nishi

Norimichi Saito

Takashi Nakao

Shinya Awano

Teppei Okawa

Keisuke Makino

A temperature sensor including a temperature sensing element () having a temperature sensing unit () and a pair of device electrode wires () extending from the temperature sensing unit; a sheath member () including a sheath wire () connected at a junction () to one of the device electrode wires and a sheath outer pipe () retaining the sheath wire in an insulating material (); an inner tube () which has a bottomed cylindrical shape, the inner tube accommodating the temperature sensing element and the junction in a bottom portion side of the inner tube serving as a leading end of the temperature sensor, and extending in an extension direction of the device electrode wire and the sheath wire; and an outer tube () which has a bottomed cylindrical shape including a gas inlet hole (), the outer tube covering the inner tube, and being spaced, from the inner tube on a leading end side of the junction when viewed in a direction perpendicular to an axial direction of the inner tube.

Temperature sensor

A temperature sensor including: a temperature sensing element () having a temperature sensing unit () and a pair of device electrode wires (); a sheath member () having a sheath wire () connected at a junction () to at least one of the device electrode wires and a sheath outer pipe () retaining the sheath wire in an insulating material (); an inner tube () which has a bottomed cylindrical shape; and a cylindrical outer tube () having an open end, covering the inner tube such that the open end is located at a front end side of the junction and in a region to the rear end side of or aligned with the front end of the inner tube, and being spaced from the inner tube at the front end side of the junction.

A gas sensor including a detection element having a front-end portion, a detection portion formed at the front-end portion of the detection element, and a protector that covers the detection portion. The protector includes a first portion having a first sidewall and a second portion having a second sidewall disposed outside the first portion. The first sidewall has an axial front end and a tapering portion. The tapering portion is formed from the axial front end of the first sidewall. The side portion has a front-end surface provided with a first gas outlet, and the second portion has a front-end surface provided with a second gas outlet. Furthermore, at least one gas inlet is formed to the sidewall of the second portion opposite the tapering portion, and plural gas inlets are formed on the sidewall of the first portion.

Gas sensor

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Kasugai, Japan

Mitsunori Oi