Ngk Spark Plug Company, Limited

Takashi Maeda

Tatsuya Suzuki

Go Hanzawa

Takeshi Morita

Mitsunori Oi

Toshinori Nishi

Norimichi Saito

Katsuki Aoi

Tomohiro Hirata

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 knocking sensor comprises: a cylindrical body including a cylindrical portion and a supporting flange provided at an outer circumference of a lower end of the cylindrical portion; parts including an insulating member, an electrode plate and an annular piezoelectric element; and a fixing member including a tubular portion which comprises a holding portion protruding from an outer circumference of the tubular portion and is formed to insert into the cylindrical portion from an upper end of the cylindrical portion, the holding portion being elastically deformable to hold the parts, wherein the fixing member is fixed in the cylindrical portion by inserting the tubular portion into the cylindrical portion from the upper end of the cylindrical portion and wherein the parts are clamped and fixed between the supporting flange and the holding portion by holding the parts elastically with the holding portion, while the fixing member is fixed in the cylindrical portion.

Knocking sensor

Growing community of inventors

Kakamigahara, Japan

Takashi Maeda