JPH01119853U - - Google Patents
Info
- Publication number
- JPH01119853U JPH01119853U JP1560688U JP1560688U JPH01119853U JP H01119853 U JPH01119853 U JP H01119853U JP 1560688 U JP1560688 U JP 1560688U JP 1560688 U JP1560688 U JP 1560688U JP H01119853 U JPH01119853 U JP H01119853U
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- predetermined range
- fuel ratio
- air
- sensor
- 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
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000000446 fuel Substances 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000007784 solid electrolyte Substances 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- 239000011241 protective layer Substances 0.000 description 1
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
第１図はこの考案のクレーム対応図、第２図は
この考案の一実施例の制御系のシステム図、第３
図はこの実施例の酸素センサ３１の構造図、第４
図はこのセンサ３１の出力特性図、第５図はセン
サ３１からの信号を処理する回路の一例を示す図
、第６図は前記実施例の制御動作を説明するため
の流れ図、第７図は基本パルス幅Ｔｐに対する燃
料噴射特性を示す図、第８図は前記実施例の噴射
量補正係数βｉの特性を示す図である。
１…エンジン回転数センサ、２…エンジン負荷
センサ、３…基本噴射量算出手段、４…気筒別噴
射供給手段、１０…排気管、１１…酸素センサ、
１２…固体電解質、１３，１４…一対の電極、１
５…判定手段、１６…気筒別噴射量調整手段、２
１…クランク角センサ、２２…エアフローメータ
、２４…排気マニホールド、２８…酸素センサ、
３１…酸素センサ、３２…固体電解質、３３，３
４…一対の電極、３５…保護層、４１…コントロ
ールユニツト、４７〜５０…燃料噴射弁、Ｒ１〜
Ｒ３…抵抗、ＡＭＰ…オペアンプ。
Fig. 1 is a claim correspondence diagram of this invention, Fig. 2 is a system diagram of a control system of an embodiment of this invention, and Fig. 3 is a system diagram of a control system of an embodiment of this invention.
The figure is a structural diagram of the oxygen sensor 31 of this embodiment.
5 is a diagram showing an output characteristic of this sensor 31, FIG. 5 is a diagram showing an example of a circuit for processing a signal from the sensor 31, FIG. 6 is a flowchart for explaining the control operation of the above embodiment, and FIG. FIG. 8 is a diagram showing the fuel injection characteristics with respect to the basic pulse width Tp, and FIG. 8 is a diagram showing the characteristics of the injection amount correction coefficient βi of the embodiment. DESCRIPTION OF SYMBOLS 1... Engine rotation speed sensor, 2... Engine load sensor, 3... Basic injection amount calculation means, 4... Cylinder-specific injection supply means, 10... Exhaust pipe, 11... Oxygen sensor,
12... Solid electrolyte, 13, 14... Pair of electrodes, 1
5... Determination means, 16... Cylinder-specific injection amount adjustment means, 2
1... Crank angle sensor, 22... Air flow meter, 24... Exhaust manifold, 28... Oxygen sensor,
31...Oxygen sensor, 32...Solid electrolyte, 33,3
4... Pair of electrodes, 35... Protective layer, 41... Control unit, 47-50... Fuel injection valve, R1-
R3 ...resistance, AMP...op-amp.
Claims (1)
基本噴射量を運転条件に応じて算出する手段と、
この噴射量の燃料を気筒別に噴射供給する手段と
を備える多気筒エンジンの空燃比制御装置におい
て、酸素イオン伝導性の固体電解質を挾んで一対
の電極を配設した酸素センサであつて被測定ガス
中の酸素濃度が変化した際にその変化が一対の電
極に到達する時間差のあいだだけ出力をするもの
を、一対の電極の方向が排気流れに沿うように排
気管に配置する一方で、このセンサからの出力が
所定の範囲を越えるかどうかを気筒別に判定する
手段と、所定の範囲を越える気筒について所定の
範囲に収まるように前記基本噴射量を増減調整す
る手段を設けたことを特徴とする多気筒エンジン
の空燃比制御装置。 means for calculating a basic injection amount common to all cylinders according to operating conditions so as to obtain a constant air-fuel ratio;
In an air-fuel ratio control device for a multi-cylinder engine, which is equipped with a means for injecting and supplying this amount of fuel to each cylinder, an oxygen sensor is provided with a pair of electrodes sandwiching an oxygen ion-conducting solid electrolyte, and the gas to be measured is This sensor is placed in the exhaust pipe so that the direction of the pair of electrodes is along the exhaust flow. The invention is characterized by comprising means for determining for each cylinder whether or not the output from the engine exceeds a predetermined range, and means for increasing or decreasing the basic injection amount for cylinders exceeding the predetermined range so that the output falls within the predetermined range. Air-fuel ratio control device for multi-cylinder engines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1560688U JPH01119853U (en) | 1988-02-08 | 1988-02-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1560688U JPH01119853U (en) | 1988-02-08 | 1988-02-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01119853U true JPH01119853U (en) | 1989-08-14 |
Family
ID=31227797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1560688U Pending JPH01119853U (en) | 1988-02-08 | 1988-02-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01119853U (en) |
-
1988
- 1988-02-08 JP JP1560688U patent/JPH01119853U/ja active Pending