JPH0416626B2 - - Google Patents
Info
- Publication number
- JPH0416626B2 JPH0416626B2 JP57038124A JP3812482A JPH0416626B2 JP H0416626 B2 JPH0416626 B2 JP H0416626B2 JP 57038124 A JP57038124 A JP 57038124A JP 3812482 A JP3812482 A JP 3812482A JP H0416626 B2 JPH0416626 B2 JP H0416626B2
- Authority
- JP
- Japan
- Prior art keywords
- solenoid valve
- fuel
- speed
- engine speed
- slow
- 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 - Lifetime
Links
- 239000000446 fuel Substances 0.000 claims description 32
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M3/00—Idling devices for carburettors
- F02M3/02—Preventing flow of idling fuel
- F02M3/04—Preventing flow of idling fuel under conditions where engine is driven instead of driving, e.g. driven by vehicle running down hill
- F02M3/045—Control of valves situated in the idling nozzle system, or the passage system, by electrical means or by a combination of electrical means with fluidic or mechanical means
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Description
【発明の詳細な説明】
この発明は減速時の低速燃料制御装置に係り、
特に、機関減速時におけるスロー通路開閉用電磁
弁を間欠的に開閉弁させる制御手段を設けること
により、減速時における低速燃料のカツト制御を
容易確実にした減速時の低速燃料制御装置に関す
る。[Detailed Description of the Invention] This invention relates to a low speed fuel control device during deceleration,
In particular, the present invention relates to a low-speed fuel control device during deceleration that easily and reliably controls the cut of low-speed fuel during deceleration by providing a control means that intermittently opens and closes a solenoid valve for opening and closing a slow passage during engine deceleration.
機関減速時における混合気の過濃化や過薄化
と、それによる失火により発生するアフタフアイ
ヤ(後燃え現象)を防止すべくスロー通路に通路
開閉弁たる電磁弁を設け、減速時に通路を閉鎖
し、低速燃料を遮断する減速時の低速燃料制御装
置(実公昭54−14826号)がある。 In order to prevent the mixture from becoming too rich or too lean when the engine decelerates, and to prevent afterburn caused by misfires, a solenoid valve is installed in the slow passage to close the passage when the engine decelerates. There is a low-speed fuel control device (Utility Model Publication No. 14826, 1983) during deceleration that cuts off low-speed fuel.
そして、この制御装置は、スロー燃料カツト後
のメイン系統へのつなぎ特性を円滑にし、また空
燃比の過薄化を防止すべくスロー通路に小径の燃
料供給通路がバイパスとして設けられている。し
かし、この燃料供給通路は画一的に形成されてい
るので、低速燃料のカツト量が一定不変であり、
スロー燃料カツト後の機関復帰を改善し得ぬとと
もに、アフタフアイヤをも防止し得ず、触媒保
護、燃費向上、有害成分の排出減少をも効率良く
果たし得ぬ欠点があつた。 In this control device, a small-diameter fuel supply passage is provided as a bypass in the slow passage in order to smooth the connection to the main system after slow fuel cut and to prevent the air-fuel ratio from becoming excessively lean. However, since this fuel supply passage is uniformly formed, the amount of low-speed fuel cut remains constant.
This method had the disadvantage that it could not improve engine recovery after a slow fuel cut, could not prevent afterfire, and could not efficiently protect the catalyst, improve fuel efficiency, and reduce emissions of harmful components.
そこで、この発明の目的は、スロー通路を開閉
する電磁弁を設け、吸気管負圧および機関回転数
のいずれもが設定値以上のときにのみ電磁弁を間
欠的に開閉弁させる制御手段を設け、電磁弁の間
欠開閉弁時間を機関回転数に比例して変化させる
比例可変手段を設けたことにより、減速時に低速
燃料の大部分を遮断するとともに、一部を空燃比
補正用として調整自在に供給し、スロー燃料カツ
ト後におけるメイン系統へのつなぎ特性を円滑に
するとともに、アフタフアイヤを防止し、また、
電磁弁の間欠閉弁時間を機関回転数に比例して増
大させる比例可変手段を付設することにより、上
記効果を更に向上させ得る減速時の低速燃料制御
装置を提供するにある。 Therefore, an object of the present invention is to provide a solenoid valve that opens and closes a slow passage, and to provide a control means that intermittently opens and closes the solenoid valve only when both the intake pipe negative pressure and the engine speed are above a set value. By installing a proportional variable means that changes the intermittent opening/closing time of the solenoid valve in proportion to the engine speed, most of the low-speed fuel is cut off during deceleration, and a portion can be freely adjusted to correct the air-fuel ratio. supply, smooth the connection characteristics to the main system after slow fuel cut, prevent afterfire, and
It is an object of the present invention to provide a low-speed fuel control device during deceleration that can further improve the above-mentioned effects by providing a proportional variable means for increasing the intermittent closing time of the electromagnetic valve in proportion to the engine speed.
以下、図面に基づいてこの発明の実施例を詳細
かつ具体的に説明する。 Hereinafter, embodiments of the present invention will be described in detail and specifically based on the drawings.
第1図において、2は内燃機関のスロー通路、
4は電磁弁、6は電磁弁の弁体、8はイグニシヨ
ンスイツチ、10はイグニシヨンコイル、そして
12はバツテリである。スロー系統のスロー通路
2を開閉する電磁弁4を設け、この電磁弁4の弁
体6をスロー通路2の途中に突出遮断し得るよう
に装着し、電磁弁4がOFF作動のとき突出閉弁
し、電磁弁4がON作動のとき後退し開弁すべく
構成する。 In Fig. 1, 2 is the slow passage of the internal combustion engine;
4 is a solenoid valve, 6 is a valve body of the solenoid valve, 8 is an ignition switch, 10 is an ignition coil, and 12 is a battery. A solenoid valve 4 that opens and closes the slow passage 2 of the slow system is provided, and the valve body 6 of the solenoid valve 4 is installed in the middle of the slow passage 2 so as to be able to protrude and shut off, and when the solenoid valve 4 is in OFF operation, the solenoid valve 4 protrudes and closes. The solenoid valve 4 is configured to move backward and open when the solenoid valve 4 is ON.
また、機関減速時のみ、つまり吸気管負圧およ
び機関回転数のいずれもが設定値以上のときにの
み、電磁弁4を間欠的に開閉弁させる制御手段1
4を設け、電磁弁4の間欠開閉弁時間を機関回転
数に比例して変化させる比例可変手段24を設け
る。 Further, the control means 1 opens and closes the solenoid valve 4 intermittently only when the engine is decelerating, that is, when both the intake pipe negative pressure and the engine speed are equal to or higher than a set value.
4, and a proportional variable means 24 for changing the intermittent opening/closing time of the solenoid valve 4 in proportion to the engine speed.
すなわち、第1図に示す如く、電磁弁4とバツ
テリ12とを直列接続し、この回路中にイグニシ
ヨンスイツチ8を直列に接続する。更に、回転セ
ンサ16と負圧センサ18とを並列に接続し、こ
の並列体を前記回路に直列に接続する。 That is, as shown in FIG. 1, a solenoid valve 4 and a battery 12 are connected in series, and an ignition switch 8 is connected in series in this circuit. Further, the rotation sensor 16 and the negative pressure sensor 18 are connected in parallel, and this parallel body is connected in series to the circuit.
前記回転センサ16は、機関回転数が設定値以
上のときにOFFとなるブレークスイツチ機能
(第2図参照)を有するものとし、また、負圧セ
ンサ18も、吸気管負圧が設定値以上の高負圧の
ときにOFFとなるブレークスイツチ機能(第3
図参照)を持たせて構成する。また、前記回転セ
ンサ16をイグニシヨンコイル10に接続し、そ
の断続電流をシグナルとして入力して機関回転数
を検知させるべく構成する。 The rotation sensor 16 has a break switch function (see Fig. 2) that turns off when the engine speed exceeds a set value, and the negative pressure sensor 18 also has a break switch function that turns off when the engine speed exceeds a set value. Break switch function (3rd
(see figure). Further, the rotation sensor 16 is connected to the ignition coil 10, and its intermittent current is inputted as a signal to detect the engine rotation speed.
また、タイマ20を前記回転センサ16に直列
に接続する。 Further, a timer 20 is connected in series to the rotation sensor 16.
更に、第5図に示す如く、パルス電流を発生す
るタイマ20に、このタイマ20の発生パルス特
性を機関回転数に比例させて変化させる比例可変
手段24を設ける。この比例可変手段24は、前
記回転センサ16に対して並列に配設され、前記
タイマ20とイグニシヨンコイル10とを接続し
ている。 Furthermore, as shown in FIG. 5, the timer 20 that generates the pulse current is provided with proportional variable means 24 that changes the characteristics of the generated pulses of the timer 20 in proportion to the engine speed. The proportional variable means 24 is arranged in parallel to the rotation sensor 16 and connects the timer 20 and the ignition coil 10.
つまり、具体的には、内燃機関の復帰性能は機
関の高回転域ほど良好であることから、従来装置
の如く燃料カツト時間を、第5図に示す如く、機
関回転数に比例させて長く、つまり、OFF時間
aを長く、ON時間b(パルス幅)を短く設定す
るのである。 Specifically, since the return performance of an internal combustion engine is better in the higher rotational speed range of the engine, as shown in FIG. In other words, the OFF time a is set long and the ON time b (pulse width) is set short.
次に作用について説明する。 Next, the effect will be explained.
まず、アイドリング時においては、吸気管負圧
は高く、設定値以上を示し、負圧センサ18は
OFF作動する。しかし、機関回転数は設定値以
下を示し、このため回転センサ16はON作動す
るので、回転センサ16を含む回路が閉じ、電磁
弁4のソレノイドに電流が印加される。このため
電磁弁4のON動作により弁体6は後退し、スロ
ー通路2は、開通状態たる通常の状態を維持し、
スロー通路2内の低速燃料はアイドルポート(図
示せず)から吸気通路を経て燃焼室に供給され
る。 First, during idling, the intake pipe negative pressure is high and exceeds the set value, and the negative pressure sensor 18 is
OFF operates. However, the engine speed is below the set value, and therefore the rotation sensor 16 is turned on, so the circuit including the rotation sensor 16 is closed and a current is applied to the solenoid of the electromagnetic valve 4. Therefore, when the solenoid valve 4 is turned on, the valve body 6 moves backward, and the slow passage 2 maintains its normal open state.
Low-speed fuel in the slow passage 2 is supplied to the combustion chamber from an idle port (not shown) through an intake passage.
そして、減速時においては、吸気管負圧および
機関回転数のいずれもが設定値以上を示し、負圧
センサ18および回転センサ16は共にOFF作
動し、電磁弁4のソレノイドへの通電が遮断され
る。このため、電磁弁4の弁体6は突出して閉弁
作動し、スロー通路2の閉鎖により、低速燃料の
供給がカツトされる。これにより混合気のリツチ
化やアフタフアイヤの発生を防止し得る。 During deceleration, both the intake pipe negative pressure and the engine speed exceed the set values, the negative pressure sensor 18 and the rotation sensor 16 are both turned off, and the energization to the solenoid of the solenoid valve 4 is cut off. Ru. Therefore, the valve body 6 of the solenoid valve 4 protrudes and closes, and the slow passage 2 is closed, thereby cutting off the supply of low-speed fuel. This can prevent the mixture from becoming rich and afterburning.
しかして、この低速燃料のカツトが従来の如く
継続すると、絞り弁全閉と相俟つて燃料不足をき
たし、燃料カツト後の復帰たるメイン系統へのつ
なぎ特性が悪化するとともに失火によるアフタフ
アイヤが発生する傾向がある。しかし、この発明
では、パルス電流を発生するタイマ20を併設し
たので、電磁弁4の間欠駆動されることとなり、
スロー通路2は、間欠的に遮断されることとな
り、低速燃料は少量ずつであるが間欠的に供給さ
れることとなる。 However, if this low-speed fuel cut continues as before, the throttle valve will close completely, leading to a fuel shortage, deteriorating the connection characteristics to the main system after the fuel cut, and causing afterfire due to misfire. Tend. However, in this invention, since a timer 20 that generates a pulse current is also provided, the solenoid valve 4 is driven intermittently.
The slow passage 2 will be intermittently blocked, and the low-speed fuel will be intermittently supplied, albeit in small amounts.
このとき、比例可変手段が、第5図に示す如
く、機関回転数に比例させてパルス電流のOFF
時間aを大としている。 At this time, the proportional variable means turns off the pulse current in proportion to the engine speed, as shown in Figure 5.
Time a is set to be large.
これにより、この時期における混合気の過激な
リーン化を防止することができ、メイン通路への
つなぎ特性の向上のみならず失火によるアフタフ
アイヤを防止し得る。 As a result, it is possible to prevent the air-fuel mixture from becoming extremely lean during this period, and it is possible to not only improve the connection characteristics to the main passage but also to prevent afterfire due to misfire.
また、タイマを所望の限時特性に設定すること
で、間欠遮断特性を変更し得て、この減速時の空
燃比を所望のものに制御し得る。 Further, by setting the timer to a desired time limit characteristic, the intermittent cutoff characteristic can be changed, and the air-fuel ratio during deceleration can be controlled to a desired value.
更に、比例可変手段24を設けたことにより、
機関回転数に比例的に減少させ得て、機関運転状
況に応じた緻密なスロー燃料の制御を果たすこと
ができ、従来の減速時の不都合をより一層改善す
ることが可能である。 Furthermore, by providing the proportional variable means 24,
The slow fuel can be reduced in proportion to the engine speed, and precise slow fuel control can be achieved in accordance with engine operating conditions, making it possible to further improve the conventional inconveniences during deceleration.
以上の説明から明きらかなようにこの発明によ
れば、スロー通路を開閉する電磁弁を設け、吸気
管負圧および機関回転数のいずれもが設定値以上
のときにのみ電磁弁を間欠的に開閉弁させる制御
手段を設け、電磁弁の間欠開閉弁時間を機関回転
数に比例して変化させる比例可変手段を設けたの
で、機関減速時においては、混合気の過濃化や過
薄化によるアフタフアイヤ現象の発生を防止し、
また排気ガスの浄化を果たし得ることは勿論、触
媒の活性保護、そして燃費改善を果たし得る。ま
た、所望の空燃比を維持することができ、燃料カ
ツト後のメイン系統へのつなぎ特性を向上させ得
る。また、構成が簡略であるし、カツト率の設定
幅が広いので設計の自由度が高い。 As is clear from the above description, according to the present invention, a solenoid valve that opens and closes the slow passage is provided, and the solenoid valve is intermittently activated only when both the intake pipe negative pressure and the engine speed are above set values. A control means for opening and closing the valve is provided, and a proportional variable means is provided for changing the intermittent opening and closing time of the solenoid valve in proportion to the engine speed. Prevents the after-fire phenomenon,
In addition to purifying exhaust gas, it can also protect catalyst activity and improve fuel efficiency. Further, a desired air-fuel ratio can be maintained, and the connection characteristics to the main system after fuel cut can be improved. Furthermore, the configuration is simple and the cutting rate can be set over a wide range, so there is a high degree of freedom in design.
また、電磁弁の間欠開閉時間を機関回転数に比
例して変化させる比例可変手段によつて機関回転
数に応じたスロー燃料の制御を行うことができ
る。 Furthermore, slow fuel control can be performed in accordance with the engine speed by means of a proportional variable means that changes the intermittent opening/closing time of the electromagnetic valve in proportion to the engine speed.
第1図はこの発明の実施例に係る減速時の低速
燃料制御装置を示す系統図、第2図は回転センサ
の特性を示すグラフ、第3図は負圧センサの特性
を示すグラフ、第4図はタイマの特性を示すグラ
フ、第5図は第1図の比例可変手段の特性を示す
グラフである。
2はスロー通路、4は電磁弁、6は弁体、8は
イグニシヨンスイツチ、10はイグニシヨンコイ
ル、12はバツテリ、14は制御手段、16は回
転センサ、18は負圧センサ、20はタイマ、2
4は比例可変手段である。
Fig. 1 is a system diagram showing a low-speed fuel control device during deceleration according to an embodiment of the present invention, Fig. 2 is a graph showing the characteristics of the rotation sensor, Fig. 3 is a graph showing the characteristics of the negative pressure sensor, and Fig. 4 is a graph showing the characteristics of the negative pressure sensor. The figure is a graph showing the characteristics of the timer, and FIG. 5 is a graph showing the characteristics of the proportional variable means shown in FIG. 2 is a slow passage, 4 is a solenoid valve, 6 is a valve body, 8 is an ignition switch, 10 is an ignition coil, 12 is a battery, 14 is a control means, 16 is a rotation sensor, 18 is a negative pressure sensor, 20 is a timer ,2
4 is a proportional variable means.
Claims (1)
負圧および機関回転数のいずれもが設定値以上の
ときにのみ前記電磁弁を間欠的に開閉弁させる制
御手段を設け、電磁弁の間欠開閉弁時間を機関回
転数に比例して変化させる比例可変手段を設けた
ことを特徴とする減速時の低速燃料制御装置。1 A solenoid valve that opens and closes the slow passage is provided, and a control means is provided that intermittently opens and closes the solenoid valve only when both the intake pipe negative pressure and the engine speed are above a set value, and the solenoid valve is opened and closed intermittently. A low-speed fuel control device during deceleration, characterized in that a proportional variable means for changing a valve time in proportion to the engine speed is provided.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3812482A JPS58155259A (en) | 1982-03-12 | 1982-03-12 | Low speed fuel control device during deceleration |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3812482A JPS58155259A (en) | 1982-03-12 | 1982-03-12 | Low speed fuel control device during deceleration |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS58155259A JPS58155259A (en) | 1983-09-14 |
JPH0416626B2 true JPH0416626B2 (en) | 1992-03-24 |
Family
ID=12516700
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3812482A Granted JPS58155259A (en) | 1982-03-12 | 1982-03-12 | Low speed fuel control device during deceleration |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58155259A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6157150U (en) * | 1984-09-20 | 1986-04-17 | ||
JPS61149558A (en) * | 1984-12-20 | 1986-07-08 | Aisan Ind Co Ltd | Control method for speed reduction of engine |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57198345U (en) * | 1981-06-12 | 1982-12-16 |
-
1982
- 1982-03-12 JP JP3812482A patent/JPS58155259A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS58155259A (en) | 1983-09-14 |
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