JPS59175165U

JPS59175165U - Oxygen concentration detector with heater

Info

Publication number: JPS59175165U
Application number: JP6866283U
Authority: JP
Inventors: 伸秀加藤; 隆生村瀬
Original assignee: 日本碍子株式会社
Priority date: 1983-05-09
Filing date: 1983-05-09
Publication date: 1984-11-22

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は本考案の加熱器付酸素濃度検出器の一実施例を
示す断面図であり、第２図は本考案の加熱器付酸素濃度
検出器に用いられる棒状加熱器の一具体例を示す説明図
、第３図は本考案の加熱器付酸素濃度検出器に用いられ
る金属製保護カバーの一具体例を示す斜視説明図、第４
図は、従来の加熱器付酸素濃度検出器と本考案の加熱器
付酸素濃度検出器の排気ガス温度に対する固体電解質の
温度の関係を示すグラフ、第５図は発熱部の位置が種々
異なるセララミックヒーターを設けた各種酸素濃度検出
器における排気ガス温度と固体電解質の温度との関係を
示すグラフ、第６図は発熱部の位置が種々異なるセラミ
ックヒータ−を設けた各種酸素濃度検出器におけるエン
ジン始動時からの酸素濃度検出器における起電力の発生
状態を示すグラフ、第７図は発熱部の位置が種々なるセ
ラミックヒータ−を設けた各種酸素濃度検出器における
排気ガス温度と中心電極が固体電解質と接する部分の温
度との関係を示すグラフである。１：有底筒状固体電解質、２：ハウジング、３：タルク
、４：ワッシャ、５：リング、６：棒状加熱器、７：保
護カバー、８：中心電極、９：棒状セラミック、１０：
導電部、１１：発熱部、１２ニル−パー、１３：排気ガ
ス導入口。FIG. 1 is a sectional view showing an embodiment of the oxygen concentration detector with a heater of the present invention, and FIG. 2 is a sectional view showing a specific example of the rod-shaped heater used in the oxygen concentration detector with a heater of the present invention. FIG. 3 is a perspective explanatory view showing a specific example of a metal protective cover used in the oxygen concentration detector with heater of the present invention;
The figure is a graph showing the relationship between the temperature of the solid electrolyte and the exhaust gas temperature of a conventional oxygen concentration detector with a heater and an oxygen concentration detector with a heater of the present invention. Graph showing the relationship between exhaust gas temperature and solid electrolyte temperature in various oxygen concentration detectors equipped with ceramic heaters. Figure 6 shows the relationship between exhaust gas temperature and solid electrolyte temperature in various oxygen concentration detectors equipped with ceramic heaters. A graph showing the generation state of electromotive force in the oxygen concentration detector from the time of startup. Figure 7 shows the exhaust gas temperature and the center electrode of various oxygen concentration detectors equipped with ceramic heaters with various positions of the heat generating part and solid electrolyte. It is a graph showing the relationship between the temperature of the part in contact with the 1: Bottomed cylindrical solid electrolyte, 2: Housing, 3: Talc, 4: Washer, 5: Ring, 6: Rod-shaped heater, 7: Protective cover, 8: Center electrode, 9: Rod-shaped ceramic, 10:
Conductive part, 11: Heat generating part, 12 Ni-par, 13: Exhaust gas inlet.

Claims

[Scope of utility model registration request]

(1) A bottomed cylindrical solid electrolyte with porous platinum electrodes on the inner and outer surfaces, and the closed end of the solid electrolyte is exposed to the gas, while the inside of the cylinder is stored airtightly isolated from the exhaust gas. a metal protective cover that surrounds the outer periphery of the closed end side of the solid electrolyte and has an exhaust gas inlet, and a rod-shaped heater that is inserted into the cylinder of the solid electrolyte. In the concentration detector, the rod-shaped heater is a ceramic heater having a positive temperature coefficient of resistance, and the heat generating part of the ceramic heater is provided in a portion where the solid electrolyte protrudes from the housing. Features: Oxygen concentration detector with heater.

(2) The temperature coefficient of resistance of the ceramic heater is 0.
3%/°C or more, the oxygen concentration detector with a heater according to claim 1, which is a utility model.