JPS6233091Y2 - - Google Patents
Info
- Publication number
- JPS6233091Y2 JPS6233091Y2 JP13709580U JP13709580U JPS6233091Y2 JP S6233091 Y2 JPS6233091 Y2 JP S6233091Y2 JP 13709580 U JP13709580 U JP 13709580U JP 13709580 U JP13709580 U JP 13709580U JP S6233091 Y2 JPS6233091 Y2 JP S6233091Y2
- Authority
- JP
- Japan
- Prior art keywords
- water temperature
- timer circuit
- warm
- combustion engine
- internal combustion
- 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.)
- Expired
Links
- 238000002485 combustion reaction Methods 0.000 claims description 12
- 239000000446 fuel Substances 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims description 2
- 150000002926 oxygen Chemical class 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
Landscapes
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
【考案の詳細な説明】
〔考案の利用分野〕
本考案は内燃機関の排気ガス中の酸素濃度を検
出する酸素センサの出力により内燃機関へ供給さ
れる混合気の空燃比を制御するフイードバツク制
御装置に関し、特にそのフイードバツク制御の開
始を制御する装置に関する。[Detailed description of the invention] [Field of application of the invention] The present invention is a feedback control device that controls the air-fuel ratio of a mixture supplied to an internal combustion engine based on the output of an oxygen sensor that detects the oxygen concentration in the exhaust gas of the internal combustion engine. In particular, the present invention relates to a device for controlling the start of feedback control.
上記フイードバツク制御の開始は従来は酸素セ
ンサの活性化を検知して行なわれていた。この活
性化の検知は例えば酸素センサの内部インピーダ
ンスや出力電圧値を測定することにより可能とな
る。
Conventionally, the above-mentioned feedback control was started by detecting activation of an oxygen sensor. This activation can be detected, for example, by measuring the internal impedance or output voltage value of the oxygen sensor.
内部インピーダンスを測定して空燃比のフイー
ドバツクを開始する装置および具体的なフイード
バツク回路は特開昭51−129530号公報に開示され
ている。一方センサ出力を検出してフイードバツ
ク制御を開始する装置は特開昭53−81826号公報
に開示されている。 A device for measuring internal impedance and starting air-fuel ratio feedback and a specific feedback circuit are disclosed in Japanese Patent Laid-Open No. 129530/1983. On the other hand, a device for starting feedback control by detecting sensor output is disclosed in Japanese Patent Application Laid-Open No. 53-81826.
しかし上記の装置では高精度の制御が得られる
との長所を有する一方で装置が複雑となる欠点を
有していた。 However, while the above-mentioned apparatus has the advantage of providing highly accurate control, it also has the disadvantage that the apparatus is complicated.
そして、このような欠点を解消するためには内
燃機関の暖機制御の終了に基づき空燃比のフイー
ドバツク制御を開始する方法が知られている。し
かしこの方法では暖機運転終了後短時間内燃機関
を停止し、その後再始動した場合問題が起る。酸
素センサは急激に冷却するのに対し、冷却水は比
熱が大きく冷却速度が遅い。したがつて内燃機関
を短時間停止した場合水温の低下は少いのに対
し、酸素センサは大幅に冷却する。そのため直ち
にフイードバツク制御を開始すると混合気の空燃
比が過濃となる。 In order to eliminate such drawbacks, a method is known in which feedback control of the air-fuel ratio is started based on the completion of warm-up control of the internal combustion engine. However, with this method, a problem arises when the internal combustion engine is stopped for a short time after warm-up and then restarted. Oxygen sensors cool rapidly, whereas cooling water has a large specific heat and has a slow cooling rate. Therefore, when the internal combustion engine is stopped for a short period of time, the water temperature decreases little, but the oxygen sensor cools down considerably. Therefore, if the feedback control is started immediately, the air-fuel ratio of the air-fuel mixture becomes excessively rich.
このため、特開昭50−12417号公報、特開昭53
−14222号公報にあるように暖機終了後にタイマ
回路を用いてフイードバツク制御の開始を行うこ
とが提案されている。 For this reason, Japanese Patent Application Laid-open No. 50-12417, Japanese Patent Application Laid-open No. 53
As disclosed in Japanese Patent No. 14222, it has been proposed to start feedback control using a timer circuit after warm-up is completed.
しかしながら、このタイマ回路は一定時間経過
後にフイードバツクを開始する構成となつている
ため、内燃機関の状態に充分対応した制御となつ
ていなかつた。 However, since this timer circuit is configured to start feedback after a certain period of time has elapsed, the control is not sufficiently responsive to the state of the internal combustion engine.
本考案の目的は簡単な構成でかつ内燃機関の状
態に対応した空燃比のフイードバツク制御の開始
を制御できる装置を提供することである。
An object of the present invention is to provide a device that has a simple configuration and can control the start of air-fuel ratio feedback control in accordance with the state of an internal combustion engine.
本考案は、タイマ回路より定まる時間を冷却水
温の値に応じて定めたところにその特徴がある。
The present invention is characterized in that the time determined by the timer circuit is determined according to the value of the cooling water temperature.
このようにすると、冷却水温が高い程内燃機関
が安定して回転できるため、正確なフイードバツ
クの開始を実行できるものである。 In this way, the higher the cooling water temperature, the more stably the internal combustion engine can rotate, making it possible to start feedback accurately.
第１図は一実施例を示すブロツク図、第２図は
動作説明図である。
FIG. 1 is a block diagram showing one embodiment, and FIG. 2 is an operation explanatory diagram.
内燃機関の暖機運転の終了を暖機終了検知手段
１０で検知する。尚この暖機終了検知手段１０は
既に周知の方法で暖機運転の終了を検知する。こ
の暖機運転の終了を検知した後タイマ回路１２が
動作し、時間TMを計測する。 The end of the warm-up operation of the internal combustion engine is detected by a warm-up end detection means 10. The warm-up end detection means 10 detects the end of warm-up operation using a well-known method. After detecting the end of this warm-up operation, the timer circuit 12 operates and measures the time TM.
第２図で暖機終了がエンジン冷却水温TWが設
定値TWOに達したことで検知され、この検知時
点TOからタイマ回路１２により時間TMが計測
され、時点T1で空燃比フイードバツク制御装置
１４は酸素センサ２０の出力に基づきフイードバ
ツク制御を開始する。 In FIG. 2, the end of warm-up is detected when the engine coolant temperature TW reaches the set value TWO. From this detection time TO, the timer circuit 12 measures the time TM, and at the time T1, the air-fuel ratio feedback control device 14 Feedback control is started based on the output of sensor 20.
タイマ回路１２で定まる時間TMは冷却水温に
よつて定まり、冷却水温の値に応じて時間TMが
増減されるものである。 The time TM determined by the timer circuit 12 is determined by the cooling water temperature, and the time TM is increased or decreased depending on the value of the cooling water temperature.
本考案は簡単な構成で内燃機関の状態に対応し
た空燃比フイードバツク制御の開始を制御でき
る。
The present invention has a simple configuration and can control the start of air-fuel ratio feedback control corresponding to the state of the internal combustion engine.
第１図は本考案の一実施例を示すブロツク図、
第２図は第１図の動作を説明する動作説明図であ
る。
１０…暖機終了検知手段、１２…タイマ回路、
１４…空燃比のフイーババツク制御装置、１６…
水温センサ、１８…回転速度センサ。
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is an explanatory diagram illustrating the operation of FIG. 1. 10...Warm-up end detection means, 12...Timer circuit,
14... Air-fuel ratio feedback back control device, 16...
Water temperature sensor, 18...Rotation speed sensor.
Claims (1)
す出力を発生する酸素センサを取り付け、この酸
素センサの出力に基づき内燃機関への燃料供給量
をフイードバツク制御するものにおいて、内燃機
関の暖機運転の終了を検知する暖機終了検知手段
と、冷却水温度を検出する水温検知器と、上記暖
機運転の終了を示す暖機終了検知手段の出力によ
り動作し上記水温検知器により検出された水温に
よつて増減される時間の経過を測定するタイマ回
路とを備え、上記タイマ回路の測定手段により上
記フイードバツク制御を開始することを特徴とす
る空燃比制御装置。 An oxygen sensor that generates an output indicating the oxygen concentration in exhaust gas is attached to the exhaust pipe of an internal combustion engine, and the amount of fuel supplied to the internal combustion engine is feedback-controlled based on the output of this oxygen sensor. a water temperature detector that detects the cooling water temperature; and a water temperature detected by the water temperature detector operated by the output of the warm-up end detection means that indicates the end of the warm-up operation. 1. An air-fuel ratio control device comprising: a timer circuit for measuring the elapse of time that is increased or decreased by the timer circuit, and wherein the feedback control is started by the measuring means of the timer circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13709580U JPS6233091Y2 (en) | 1980-09-29 | 1980-09-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13709580U JPS6233091Y2 (en) | 1980-09-29 | 1980-09-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5759943U JPS5759943U (en) | 1982-04-09 |
| JPS6233091Y2 true JPS6233091Y2 (en) | 1987-08-24 |
Family
ID=29497187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13709580U Expired JPS6233091Y2 (en) | 1980-09-29 | 1980-09-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6233091Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59201959A (en) * | 1983-04-28 | 1984-11-15 | Suzuki Motor Co Ltd | Control device of air-fuel ratio in engine |
-
1980
- 1980-09-29 JP JP13709580U patent/JPS6233091Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5759943U (en) | 1982-04-09 |
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