JPH01111162U - - Google Patents
Info
- Publication number
- JPH01111162U JPH01111162U JP607888U JP607888U JPH01111162U JP H01111162 U JPH01111162 U JP H01111162U JP 607888 U JP607888 U JP 607888U JP 607888 U JP607888 U JP 607888U JP H01111162 U JPH01111162 U JP H01111162U
- Authority
- JP
- Japan
- Prior art keywords
- fuel ratio
- air
- sensor
- engine
- way catalyst
- 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 15
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000003054 catalyst Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 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
図と第４図はこの実施例の制御内容を説明するた
めの流れ図、第５図はこの実施例の作用を説明す
るための波形図、第６図は他の実施例の制御系の
システム図、第７図は空燃比に対する三元触媒の
転化効率とＨ２Ｓの排出量の特性図である。
１……基本噴射量算出手段、２……空燃比検出
センサ、３……空燃比偏差算出手段、４……フイ
ードバツク定数設定手段、５……空燃比フイード
バツク補正量算出手段、６……燃料噴射量設定手
段、７……排出ガス温度センサ、８……アイドル
状態検出センサ、９……運転条件判定手段、１０
……フイードバツク定数変更手段、２３……絞り
弁、２４……エアフローメータ、２５……クラン
ク角センサ、２８……三元触媒、２９……酸素セ
ンサ、３０……アイドルスイツチ、３１……排出
ガス温度センサ、３５……燃料噴射弁、４０……
コントロールユニツト、７１……比較器、７２…
…ＡＮＤ回路、７３……切換スイツチ、７４……
リツチ化フイードバツク定数設定器、７５……通
常のフイードバツク定数設定器、７６……ＯＲ回
路、７７……燃料噴射制御装置。
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.
4 and 4 are flowcharts for explaining the control contents of this embodiment, FIG. 5 is a waveform diagram for explaining the action of this embodiment, and FIG. 6 is a system diagram of the control system of another embodiment. , FIG. 7 is a characteristic diagram of the conversion efficiency of the three-way catalyst and the amount of H 2 S discharged with respect to the air-fuel ratio. DESCRIPTION OF SYMBOLS 1... Basic injection amount calculation means, 2... Air-fuel ratio detection sensor, 3... Air-fuel ratio deviation calculation means, 4... Feedback constant setting means, 5... Air-fuel ratio feedback correction amount calculation means, 6... Fuel injection amount setting means, 7...exhaust gas temperature sensor, 8...idle state detection sensor, 9...operating condition determination means, 10
... Feedback constant changing means, 23 ... Throttle valve, 24 ... Air flow meter, 25 ... Crank angle sensor, 28 ... Three-way catalyst, 29 ... Oxygen sensor, 30 ... Idle switch, 31 ... Exhaust gas Temperature sensor, 35...Fuel injection valve, 40...
Control unit, 71... Comparator, 72...
...AND circuit, 73...changeover switch, 74...
enrichment feedback constant setter, 75... normal feedback constant setter, 76... OR circuit, 77... fuel injection control device.
Claims (1)
応じて基本噴射量を算出する手段と、実際の空燃
比を検出するセンサと、検出された実空燃比と理
論空燃比との偏差を算出する手段と、フイードバ
ツク定数を設定する手段と、このフイードバツク
定数と前記空燃比偏差とを用いて空燃比のフイー
ドバツク補正量を算出する手段と、このフイード
バツク補正量にて前記基本噴射量を補正して出力
すべき燃料噴射量を設定する手段とを備えるエン
ジンの空燃比制御装置において、前記三元触媒を
通過する排出ガス温度を検出するセンサと、エン
ジンのアイドル状態を検出するセンサと、両セン
サからの信号に基づいて高温でアイドル以外の運
転条件であるかどうかを判定する手段と、この運
転条件が判定された場合に前記フイードバツク補
正量の制御中心が理論空燃比よりもリツチ側にず
れるように前記フイードバツク定数を変更する手
段とを設けたことを特徴とするエンジンの空燃比
制御装置。 While a three-way catalyst is installed in the exhaust system, there is also a means to calculate the basic injection amount according to operating conditions, a sensor to detect the actual air-fuel ratio, and a deviation between the detected actual air-fuel ratio and the theoretical air-fuel ratio. means for setting a feedback constant, means for calculating a feedback correction amount of the air-fuel ratio using the feedback constant and the air-fuel ratio deviation, and correcting the basic injection amount using the feedback correction amount. An air-fuel ratio control device for an engine, comprising means for setting a fuel injection amount to be output, a sensor for detecting the temperature of exhaust gas passing through the three-way catalyst, a sensor for detecting an idle state of the engine, and a sensor for detecting the temperature of the exhaust gas passing through the three-way catalyst; means for determining whether the operating condition is other than high temperature and idling based on a signal from the engine; An air-fuel ratio control device for an engine, comprising means for changing the feedback constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP607888U JPH01111162U (en) | 1988-01-21 | 1988-01-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP607888U JPH01111162U (en) | 1988-01-21 | 1988-01-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01111162U true JPH01111162U (en) | 1989-07-26 |
Family
ID=31210006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP607888U Pending JPH01111162U (en) | 1988-01-21 | 1988-01-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01111162U (en) |
-
1988
- 1988-01-21 JP JP607888U patent/JPH01111162U/ja active Pending