JPS6352940U - - Google Patents
Info
- Publication number
- JPS6352940U JPS6352940U JP14681286U JP14681286U JPS6352940U JP S6352940 U JPS6352940 U JP S6352940U JP 14681286 U JP14681286 U JP 14681286U JP 14681286 U JP14681286 U JP 14681286U JP S6352940 U JPS6352940 U JP S6352940U
- Authority
- JP
- Japan
- Prior art keywords
- fuel ratio
- air
- control device
- ratio control
- difference
- 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 22
- 230000005856 abnormality Effects 0.000 claims description 8
- 230000002159 abnormal effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 1
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
第１図は本考案の第１実施例の異常判定ルーチ
ンを示す流れ図、第２図は本考案の基礎となつた
空燃比制御方法の学習ルーチンを示す流れ図、第
３図は燃料噴射量演算ルーチンを示す流れ図、第
４図は学習領域を示す線図、第５図は本考案が適
用可能な空燃比制御装置を備えたＶ型８気筒機関
を示す概略図、第６図は本考案の第１実施例にお
ける空燃比フイードバツク補正係数の変化を示す
線図、第７図は本考案の第２実施例における空燃
比フイードバツク補正係数演算ルーチンを示す流
れ図、第８図は第７図で演算した空燃比フイード
バツク補正係数の変化を示す線図、第９図は本考
案の第２実施例の異常判定を示す流れ図である。
１４Ｌ，１４Ｒ……燃料噴射弁、２５Ｌ，２５
Ｒ……バンク、１８Ｌ，１８Ｒ……Ｏ２センサ。
Fig. 1 is a flowchart showing the abnormality determination routine of the first embodiment of the present invention, Fig. 2 is a flowchart showing the learning routine of the air-fuel ratio control method that is the basis of the invention, and Fig. 3 is the fuel injection amount calculation routine. 4 is a diagram showing the learning area, FIG. 5 is a schematic diagram showing a V-type 8-cylinder engine equipped with an air-fuel ratio control device to which the present invention is applicable, and FIG. 6 is a diagram showing the learning area. FIG. 7 is a flowchart showing the air-fuel ratio feedback correction coefficient calculation routine in the second embodiment of the present invention, and FIG. 8 is a diagram showing changes in the air-fuel ratio feedback correction coefficient in the second embodiment of the present invention. A diagram showing changes in the fuel ratio feedback correction coefficient, and FIG. 9 is a flowchart showing abnormality determination in the second embodiment of the present invention. 14L, 14R...Fuel injection valve, 25L, 25
R...Bank, 18L, 18R... O2 sensor.
Claims (1)
に各気筒群の排気系の各々に排ガス中の特定成分
の濃度から空燃比を検出する空燃比センサを取付
け、前記空燃比センサの各々の出力から得られる
空燃比フイードバツク補正係数を用いて各気筒群
毎に空燃比を独立に制御する空燃比制御装置の異
常を判定する空燃比制御装置の異常判定装置にお
いて、各気筒群間の前記空燃比フイードバツク補
正係数の平均値の差を求める差演算手段と、前記
差に基づいて空燃比制御装置の異常を判定する判
定手段とを設けたことを特徴とする空燃比制御装
置の異常判定装置。 (2) 前記判定手段は前記差の絶対値が所定値以
上のとき空燃比制御装置異常と判定する実用新案
登録請求の範囲第(1)項記載の空燃比制御装置の
異常判定装置。 (3) 前記判定手段は前記差の変化率の絶対値が
所定値以上のとき空燃比制御装置異常と判定する
実用新案登録請求の範囲第(1)項記載の空燃比制
御装置の異常判定装置。[Scope of Claim for Utility Model Registration] (1) The cylinders of the engine are divided into multiple cylinder groups, and an air-fuel ratio sensor is installed in the exhaust system of each cylinder group to detect the air-fuel ratio from the concentration of specific components in the exhaust gas. , in an abnormality determination device for an air-fuel ratio control device that determines an abnormality in an air-fuel ratio control device that independently controls the air-fuel ratio for each cylinder group using an air-fuel ratio feedback correction coefficient obtained from the output of each of the air-fuel ratio sensors. , an air-fuel ratio control device comprising: a difference calculating means for calculating a difference in the average value of the air-fuel ratio feedback correction coefficients between each cylinder group; and a determining means for determining an abnormality of the air-fuel ratio control device based on the difference. Abnormality determination device for fuel ratio control device. (2) The abnormality determination device for an air-fuel ratio control device according to claim 1, wherein the determination means determines that the air-fuel ratio control device is abnormal when the absolute value of the difference is greater than or equal to a predetermined value. (3) The abnormality determination device for an air-fuel ratio control device according to claim 1, wherein the determination means determines that the air-fuel ratio control device is abnormal when the absolute value of the rate of change of the difference is greater than or equal to a predetermined value. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14681286U JPS6352940U (en) | 1986-09-25 | 1986-09-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14681286U JPS6352940U (en) | 1986-09-25 | 1986-09-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6352940U true JPS6352940U (en) | 1988-04-09 |
Family
ID=31059619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14681286U Pending JPS6352940U (en) | 1986-09-25 | 1986-09-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6352940U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0318653A (en) * | 1989-07-18 | 1991-01-28 | Honda Motor Co Ltd | Failure detecting method for internal combustion engine control device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61116044A (en) * | 1984-11-12 | 1986-06-03 | Honda Motor Co Ltd | Method for detecting abnormality in exhaust gas concentration sensor system in air-fuel ratio feedback control method for internal combustion engine |
-
1986
- 1986-09-25 JP JP14681286U patent/JPS6352940U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61116044A (en) * | 1984-11-12 | 1986-06-03 | Honda Motor Co Ltd | Method for detecting abnormality in exhaust gas concentration sensor system in air-fuel ratio feedback control method for internal combustion engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0318653A (en) * | 1989-07-18 | 1991-01-28 | Honda Motor Co Ltd | Failure detecting method for internal combustion engine control device |
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