JPS6324343U - - Google Patents
Info
- Publication number
- JPS6324343U JPS6324343U JP11813786U JP11813786U JPS6324343U JP S6324343 U JPS6324343 U JP S6324343U JP 11813786 U JP11813786 U JP 11813786U JP 11813786 U JP11813786 U JP 11813786U JP S6324343 U JPS6324343 U JP S6324343U
- Authority
- JP
- Japan
- Prior art keywords
- air
- fuel ratio
- fuel
- step value
- signal
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 claims description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims 2
- 238000012544 monitoring process Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
第１図は本考案の基本概念図、第２〜１６図は
本考案の一実施例を示す図であり、第２図はその
全体構成図、第３図はその酸素センサの分解斜視
図、第４図はその酸素センサの断面図、第５図は
その空燃比検出回路の回路図、第６図はそのセン
サ出力のタイミングチヤート、第７図はその空燃
比と検出電圧との関係を示す図、第８図はそのシ
リンダ空気量ＱＡｃｙＬの算出プログラムを示す
フローチヤート、第９図はそのスロツトル弁流路
面積Ａαのテーブルマツプ、第１０図はそのバイ
パス路面積ＡＢのテーブルマツプ、第１１図は総
流路面積Ａをエンジン回転数Ｎで除したＡ／Ｎと
エンジン回転数Ｎとをパラメータとする定常空気
量ＱＨのテーブルマツプ、第１２図はその遅れ係
数Ｋ２のテーブルマツプ、第１３図はそのインジ
エクタ空気量ＱＡｉｎｊの算出プログラムを示す
フローチヤート、第１４図はステツプ値設定のプ
ログラムを示すフローチヤート、第１５図はセン
サ出力ＩｐｓとスライスレベルＳＬとの関係を示
す図、第１６図はセンサ出力Ｉｐｓとステツプ上
・下限値（ＩＰＨＩＧＨ，ＩＰＬＯＷ）との関係
を示す図である。
７…インジエクタ（操作手段）、３３…酸素セ
ンサ、３４，５０…（信号発生手段、空燃比検出
手段）、５０…コントロールユニツト（制御手段
、設定手段）。
FIG. 1 is a basic conceptual diagram of the present invention, FIGS. 2 to 16 are diagrams showing an embodiment of the present invention, FIG. 2 is an overall configuration diagram thereof, and FIG. 3 is an exploded perspective view of the oxygen sensor. Fig. 4 is a cross-sectional view of the oxygen sensor, Fig. 5 is a circuit diagram of its air-fuel ratio detection circuit, Fig. 6 is a timing chart of its sensor output, and Fig. 7 shows the relationship between its air-fuel ratio and detected voltage. 8 is a flowchart showing the calculation program for the cylinder air amount QA cy L, FIG. 9 is a table map of the throttle valve passage area Aα, FIG. 10 is a table map of the bypass passage area AB, and FIG. Fig. 11 is a table map of the steady air amount QH using A/N, which is the total flow path area A divided by the engine speed N, and the engine speed N as parameters, and Fig. 12 is a table map of the delay coefficient K2. FIG. 13 is a flowchart showing a program for calculating the injector air amount QA inj , FIG. 14 is a flowchart showing a step value setting program, and FIG. 15 is a diagram showing the relationship between sensor output Ips and slice level SL. FIG. 16 is a diagram showing the relationship between the sensor output Ips and the step upper and lower limit values (IPHIGH, IPLOW). 7... Injector (operating means), 33... Oxygen sensor, 34, 50... (Signal generating means, air-fuel ratio detecting means), 50... Control unit (control means, setting means).
Claims (1)
供給され、理論空燃比を境にポンプ電圧が急変す
るポンプセルと、所定の基準ガスとの比較のもと
に前記相関状態を監視する電圧を出力するセンサ
セルと、を有する酸素センサと、 (b) 酸素センサのポンプ電圧の急変状態に基づ
いて理論空燃比において所定のステツプ幅でステ
ツプ状に変化し、それ以外ではポンプ電流の値に
基づいて連続的に変化する空燃比判別信号を出力
する信号発生手段と、 (c) 理論空燃比では空燃比判別信号のステツプ
値を所定のスライスレベルと比較して空燃比を判
別し、それ以外では連続的に変化している空燃比
判別信号から空燃比を判別する空燃比検出手段と
、 (d) 空燃比検出手段の出力に基づいて目標空燃
比となるように吸入空気あるいは燃料の供給量を
制御する制御手段と、 (e) 制御手段からの信号に基づいて吸入空気あ
るいは燃料の供給量を操作する操作手段と、 (f) 空燃比が理論空燃比にフイードバツク制御
されているとき、所定の単位時間当りにおける信
号発生手段の出力が所定の傾きになると、そのと
きのステツプ値の上限値および下限値に基づいて
前記空燃比判別信号のステツプ値を設定する設定
手段と、 を備えたことを特徴とする空燃比制御装置。[Scope of Claim for Utility Model Registration] (a) Based on a comparison between a pump cell that is supplied with a pump current that correlates to the oxygen concentration in the exhaust gas and whose pump voltage suddenly changes around the stoichiometric air-fuel ratio, and a predetermined reference gas. (b) a sensor cell that outputs a voltage for monitoring the correlation state; (c) At the stoichiometric air-fuel ratio, the air-fuel ratio is determined by comparing the step value of the air-fuel ratio determination signal with a predetermined slice level. (d) air-fuel ratio detection means for determining the air-fuel ratio from an air-fuel ratio determination signal that otherwise changes continuously; a control means for controlling the amount of air or fuel supplied; (e) an operating means for manipulating the amount of intake air or fuel supplied based on a signal from the control means; and (f) feedback control of the air-fuel ratio to the stoichiometric air-fuel ratio. setting means for setting the step value of the air-fuel ratio discrimination signal based on the upper and lower limit values of the step value at that time when the output of the signal generating means per predetermined unit time reaches a predetermined slope; An air-fuel ratio control device comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11813786U JPS6324343U (en) | 1986-07-31 | 1986-07-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11813786U JPS6324343U (en) | 1986-07-31 | 1986-07-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6324343U true JPS6324343U (en) | 1988-02-17 |
Family
ID=31004305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11813786U Pending JPS6324343U (en) | 1986-07-31 | 1986-07-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6324343U (en) |
-
1986
- 1986-07-31 JP JP11813786U patent/JPS6324343U/ja active Pending
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