JPS60154853U

JPS60154853U - Oxygen concentration measuring device

Info

Publication number: JPS60154853U
Application number: JP4048584U
Authority: JP
Inventors: 正之任田; 誠男石谷; 剛北原
Original assignee: 日産自動車株式会社
Priority date: 1984-03-23
Filing date: 1984-03-23
Publication date: 1985-10-15

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、第２図および第３図はこの考案による酸素濃度
測定装置に使用される酸素センサ素子の構造例を示す各
々断面説明図、第４図は酸素濃度測定装置の構成例を示
す回路図、第５図は当量比変化とポンプセル電流変化と
の関係を示すグラフ、第６図はポンプセルとセンサセル
とを分離した酸素センサ素子における当量比変化とセン
サ七゛　　　ルミ圧変化との関係を示すグラフ、第７図
はポンプセルとセンサセルとｆ！ａ一体となった酸素セ
ンサ素子における当量比変化とセンサセル電圧変化との
関係を示すグラフ、第８図は酸素センサ素子のばらつき
による当量比−ポンプセル電流特性への影響を示すグラ
フ、第９図はこの考案の実施例による酸素濃度測定装置
の構成例を示す回路説明図、第１０図はポンプセルと並
列に補正抵抗を設ける構成を示す説明図、第１１図、第
１２図およ−び第１３図は補正抵抗をコネクタ部に設け
る構成例を示す各々説明図、第１４図は酸素センサ素子
にばらつきがあるときの当量比−ポンプセル電位関係へ
の影響を示すグラフ、第１５図は補正抵抗をコネクタ部
に設ける構成例を示す説明図である。１．１１，２１・・・酸素センサ素子、６，１３・・・
ポンプセル電流極、７．１４・・・センサセル’［ｔｌ
、２３・・・ポンプセル電極兼センサセル電極、Ｒ□、
Ｒ２・・・抵抗１．Ｒｓ・・・ポンプ電流検出抵抗、Ｒ
，Ｒ’・・・補正抵抗。ン −第３図　　　　１、−−− 一請４１１　　　− １４　　１６　　１８1, 2, and 3 are cross-sectional explanatory diagrams each showing an example of the structure of an oxygen sensor element used in the oxygen concentration measuring device according to this invention, and FIG. 4 is a circuit showing an example of the configuration of the oxygen concentration measuring device. Figure 5 is a graph showing the relationship between changes in equivalence ratio and changes in pump cell current, and Figure 6 is a graph showing the relationship between changes in equivalence ratio and changes in sensor lumi pressure in an oxygen sensor element in which the pump cell and sensor cell are separated. The graph, Figure 7, shows the pump cell, sensor cell, and f! a Graph showing the relationship between equivalence ratio changes and sensor cell voltage changes in the integrated oxygen sensor element, Figure 8 is a graph showing the influence of variations in oxygen sensor elements on equivalence ratio-pump cell current characteristics, and Figure 9 is An explanatory circuit diagram showing an example of the configuration of an oxygen concentration measuring device according to an embodiment of this invention, FIG. 10 is an explanatory diagram showing a configuration in which a correction resistor is provided in parallel with a pump cell, FIGS. The figures are explanatory diagrams showing an example of a configuration in which a correction resistor is provided in the connector section, Fig. 14 is a graph showing the influence on the equivalence ratio-pump cell potential relationship when there are variations in the oxygen sensor element, and Fig. 15 is a graph showing the influence of the correction resistance on the relationship between the equivalence ratio and the pump cell potential. It is an explanatory view showing an example of composition provided in a connector part. 1.11,21...Oxygen sensor element, 6,13...
Pump cell current pole, 7.14...sensor cell' [tl
, 23...Pump cell electrode and sensor cell electrode, R□,
R2...Resistance 1. Rs...Pump current detection resistance, R
, R'...Correction resistance. - Figure 3 1, --- 1.411 - 14 16 18

Claims

[Scope of utility model registration request]

It has a pump cell that forcibly causes the movement of oxygen by an external power source and a sensor cell that detects oxygen concentration, and includes an oxygen sensor element that allows at least one of the two cells to come into contact with the gas to be measured. In an oxygen concentration measuring device that detects oxygen concentration by detecting a pump cell current that produces a desired output value,
An oxygen concentration measuring device characterized in that it is configured to detect a pump cell current when the output range of the sensor cell is 800 mV or less.