JPH0321766U - - Google Patents
Info
- Publication number
- JPH0321766U JPH0321766U JP8223989U JP8223989U JPH0321766U JP H0321766 U JPH0321766 U JP H0321766U JP 8223989 U JP8223989 U JP 8223989U JP 8223989 U JP8223989 U JP 8223989U JP H0321766 U JPH0321766 U JP H0321766U
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- fuel
- ratio feedback
- operating state
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000446 fuel Substances 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
Landscapes
- Measuring Oxygen Concentration In Cells (AREA)
Description
第１図は本考案の構成を示す機能ブロツク図、
第２図は本考案の一実施例に係る空燃比センサの
構成を示す図、第３図は同上の−矢視断面図
、第４図は同上の空燃比センサの各検出素子毎の
起電圧特性を示す線図、第５図は同上の空燃比セ
ンサの出力特性を示す線図、第６図は同上の空燃
比センサを使用した空燃比フイードバツク制御装
置の例を示す図、第７図〜第９図は制御内容を示
すフローチヤート、第１０図及び第１１図は問題
点を示す図、第１２図は空燃比センサの別の実施
例を示す図である。
１１……空燃比センサ、１２……第１検出素子
、１２Ａ，１３Ａ……固体電解質部材、１２Ｂ，
１３Ｂ……大気導入室、１３……第２検出素子、
１５Ａ……第１内側電極、１５Ｂ……第１外側電
極、１６Ａ……第２内側電極、１６Ｂ……第２外
側電極、２４ａ……スロツトルセンサ、２５……
燃料噴射弁、２６……コントロールユニツト、３
０……クランク角センサ。
Figure 1 is a functional block diagram showing the configuration of the present invention.
Fig. 2 is a diagram showing the configuration of an air-fuel ratio sensor according to an embodiment of the present invention, Fig. 3 is a sectional view taken along the - arrow in the same above, and Fig. 4 is an electromotive voltage characteristic of each detection element of the air-fuel ratio sensor in the above. FIG. 5 is a diagram showing the output characteristics of the air-fuel ratio sensor same as above, FIG. 6 is a diagram showing an example of an air-fuel ratio feedback control device using the air-fuel ratio sensor same as above, and FIGS. 7 to 9 10 and 11 are diagrams showing problems, and FIG. 12 is a diagram showing another embodiment of the air-fuel ratio sensor. 11... Air-fuel ratio sensor, 12... First detection element, 12A, 13A... Solid electrolyte member, 12B,
13B...Air introduction chamber, 13...Second detection element,
15A...first inner electrode, 15B...first outer electrode, 16A...second inner electrode, 16B...second outer electrode, 24a...throttle sensor, 25...
Fuel injection valve, 26...Control unit, 3
0...Crank angle sensor.
Claims (1)
なる空燃比に対応する排気性状で起電圧が急変す
る特性を有した複数の検出素子を、センサ本体に
一体に配設すると共に、各検出素子の電極を直列
に接続し、該直列接続された両端の電極から出力
を取出すことにより、起電圧が空燃比変化に対し
複数段で急変する特性となるようにした空燃比セ
ンサと、 機関の運転状態を検出する運転状態検出手段と
、 前記起電圧が急変する箇所にそれぞれスライス
レベルを設定し、運転状態に応じて、それらのス
ライスレベルを選択するスライスレベル選択手段
と、 前記空燃比センサの出力を選択されたスライス
レベルと比較してリツチ・リーンを判定し、これ
に基づいて空燃比フイードバツク補正量を設定す
る空燃比フイードバツク補正量設定手段と、 機関への燃料供給手段による燃料供給量をその
ときの空燃比フイードバツク補正量で補正する燃
料供給補正手段と、 を設けたことを特徴とする内燃機関の空燃比フ
イードバツク制御装置。[Claim for Utility Model Registration] Multiple detection elements that have a concentration battery function that is sensitive to the properties of exhaust gas and have the characteristic that the electromotive force changes suddenly depending on the properties of the exhaust gas that corresponds to different air-fuel ratios are integrated into the sensor body. At the same time, the electrodes of each detection element are connected in series, and the output is taken from the electrodes at both ends of the series connection, so that the electromotive force has a characteristic that changes suddenly in multiple stages in response to changes in the air-fuel ratio. an air-fuel ratio sensor; an operating state detection means for detecting the operating state of the engine; and a slice level selection means for setting slice levels at locations where the electromotive force suddenly changes, and selecting the slice levels according to the operating state. and an air-fuel ratio feedback correction amount setting means for determining rich/lean by comparing the output of the air-fuel ratio sensor with a selected slice level, and setting an air-fuel ratio feedback correction amount based on this; and An air-fuel ratio feedback control device for an internal combustion engine, comprising: fuel supply correction means for correcting the amount of fuel supplied by the supply means with the air-fuel ratio feedback correction amount at that time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8223989U JPH0754851Y2 (en) | 1989-07-14 | 1989-07-14 | Air-fuel ratio feedback control system for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8223989U JPH0754851Y2 (en) | 1989-07-14 | 1989-07-14 | Air-fuel ratio feedback control system for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0321766U true JPH0321766U (en) | 1991-03-05 |
| JPH0754851Y2 JPH0754851Y2 (en) | 1995-12-18 |
Family
ID=31628872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8223989U Expired - Lifetime JPH0754851Y2 (en) | 1989-07-14 | 1989-07-14 | Air-fuel ratio feedback control system for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0754851Y2 (en) |
-
1989
- 1989-07-14 JP JP8223989U patent/JPH0754851Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0754851Y2 (en) | 1995-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4566419A (en) | Apparatus and method for controlling air-to-fuel ratio for an internal combustion engine | |
| JPS6425440U (en) | ||
| JPH0321766U (en) | ||
| US6453896B2 (en) | Air-fuel ratio feedback control apparatus and method of internal combustion engine | |
| JPH08121223A (en) | Air-fuel ratio sensor deterioration detection device for internal combustion engine | |
| JPH0886215A (en) | Control device for internal combustion engine | |
| JP2591761Y2 (en) | Air-fuel ratio detection device for internal combustion engine | |
| JPH036035U (en) | ||
| JP2630373B2 (en) | Activity determination method for oxygen concentration sensor | |
| JPH0252939U (en) | ||
| JPS6392251U (en) | ||
| JPS6324342U (en) | ||
| JPS63146140U (en) | ||
| JPH0269037U (en) | ||
| JPH0452941U (en) | ||
| JPS6322358U (en) | ||
| JPH1030478A (en) | Fuel supply control device for internal combustion engine | |
| JPH0237242U (en) | ||
| JPS6441645U (en) | ||
| JPS6357569U (en) | ||
| JPS61199665U (en) | ||
| JPH0237246U (en) | ||
| JPS6324341U (en) | ||
| JPH0452939U (en) | ||
| JPS62167846U (en) |