JPH0421742U - - Google Patents
Info
- Publication number
- JPH0421742U JPH0421742U JP6286590U JP6286590U JPH0421742U JP H0421742 U JPH0421742 U JP H0421742U JP 6286590 U JP6286590 U JP 6286590U JP 6286590 U JP6286590 U JP 6286590U JP H0421742 U JPH0421742 U JP H0421742U
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- crank angle
- engine
- arrival time
- fuel injection
- 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 9
- 239000007789 gas Substances 0.000 claims description 8
- 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
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 1
Landscapes
- Ignition Installations For Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
第１図ないし第６図は本考案の実施例に係り、
第１図は燃料噴射制御装置の回路構成を示すブロ
ツク図、第２図は吸気系および排気系を含むエン
ジンの概略平面図、第３図は排気ガスが各気筒か
らの酸素センサまで到達する到達時間とエンジン
回転数との関係を示す特性線図、第４図は失火時
に各気筒内において残留する混合ガスの残留量と
エンジン回転数との関係を示す特性線図、第５図
は燃料噴射量演算処理動作を示す流れ図、第６図
はアイドリング時の気筒別燃料噴射量演算処理動
作を示す流れ図である。
１……２サイクルエンジン、２Ａ，２Ｂ，２Ｃ
……気筒、３Ａ，３Ｂ，３Ｃ……燃料噴射弁、４
……クランク軸、５……クランク角センサ、８…
…エアフローメータ、１１……酸素センサ、１３
……コントロールユニツト。
1 to 6 relate to embodiments of the present invention,
Figure 1 is a block diagram showing the circuit configuration of the fuel injection control device, Figure 2 is a schematic plan view of the engine including the intake system and exhaust system, and Figure 3 is the destination where exhaust gas from each cylinder reaches the oxygen sensor. A characteristic diagram showing the relationship between time and engine speed, Figure 4 is a characteristic diagram showing the relationship between the amount of mixed gas remaining in each cylinder at the time of misfire and engine speed, and Figure 5 is a characteristic diagram showing the relationship between engine speed and fuel injection. FIG. 6 is a flow chart showing the fuel injection amount calculation process for each cylinder during idling. 1...2 cycle engine, 2A, 2B, 2C
... Cylinder, 3A, 3B, 3C ... Fuel injection valve, 4
...Crankshaft, 5...Crank angle sensor, 8...
...Air flow meter, 11...Oxygen sensor, 13
...control unit.
Claims (1)
料を噴射する燃料噴射弁と、エンジン回転数とク
ランク角を検出するクランク角センサと、エンジ
ンの排気側に設けられ、各気筒から排出される排
気ガスの酸素濃度を検出する酸素センサとを有す
る２サイクルエンジン用燃料噴射制御装置におい
て、前記クランク角センサによるエンジン回転数
からアイドリング状態であるか否かを判定するア
イドリング判定手段と、該アイドリング判定手段
によつてアイドリング状態と判定したときには前
記クランク角センサによるエンジン回転数に基づ
き各気筒から前記酸素センサまでの排気ガス到達
時間を演算する到達時間演算手段と、該到達時間
演算手段で演算した排気ガス到達時間と前記クラ
ンク角センサによるクランク角とにより、いずれ
の気筒から酸素センサに到達した排気ガスである
かを決定する気筒別到達ガス決定手段と、該気筒
別到達ガス決定手段で決定した各気筒ごとの酸素
濃度を前記酸素センサで検出し、この検出値から
アイドリング時に各気筒において失火したか否か
を判定する気筒別失火判定手段と、失火によつて
燃焼室内に残留する混合ガスの残留量を前記クラ
ンク角センサで検出したエンジン回転数との関係
で演算する残留量演算手段と、燃料噴射量に対し
て該残留量演算手段によつて演算される残留量を
補正演算する燃料噴射量補正演算手段とからなる
２サイクルエンジン用燃料噴射制御装置。 A fuel injection valve that injects fuel into the combustion chamber in each cylinder of the 2-stroke engine body, a crank angle sensor that detects engine speed and crank angle, and exhaust gas that is installed on the exhaust side of the engine and is discharged from each cylinder. An idling determination means for determining whether or not the engine is in an idling state based on the engine rotational speed detected by the crank angle sensor; Therefore, when the idling state is determined, arrival time calculation means calculates the exhaust gas arrival time from each cylinder to the oxygen sensor based on the engine rotation speed determined by the crank angle sensor, and arrival time calculation means calculates the exhaust gas arrival time calculated by the arrival time calculation means. cylinder-by-cylinder arrival gas determination means for determining from which cylinder the exhaust gas has reached the oxygen sensor based on time and the crank angle determined by the crank angle sensor; and for each cylinder determined by the cylinder-by-cylinder arrival gas determination means. a cylinder-by-cylinder misfire determination means for detecting the oxygen concentration with the oxygen sensor and determining from this detected value whether or not a misfire has occurred in each cylinder during idling; a residual amount calculation means that calculates in relation to the engine rotation speed detected by the crank angle sensor; and a fuel injection amount correction calculation that corrects the residual amount calculated by the residual amount calculation means with respect to the fuel injection amount. A fuel injection control device for a two-stroke engine, comprising means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6286590U JPH0421742U (en) | 1990-06-14 | 1990-06-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6286590U JPH0421742U (en) | 1990-06-14 | 1990-06-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0421742U true JPH0421742U (en) | 1992-02-24 |
Family
ID=31592401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6286590U Pending JPH0421742U (en) | 1990-06-14 | 1990-06-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0421742U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019108889A (en) * | 2017-11-27 | 2019-07-04 | ゼネラル・エレクトリック・カンパニイ | System and method for retardation of spark timing |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0240052A (en) * | 1988-07-29 | 1990-02-08 | Fuji Heavy Ind Ltd | Number of idle revolutions control device for 2-cycle direct injection engine |
-
1990
- 1990-06-14 JP JP6286590U patent/JPH0421742U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0240052A (en) * | 1988-07-29 | 1990-02-08 | Fuji Heavy Ind Ltd | Number of idle revolutions control device for 2-cycle direct injection engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019108889A (en) * | 2017-11-27 | 2019-07-04 | ゼネラル・エレクトリック・カンパニイ | System and method for retardation of spark timing |
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