JPS6211316Y2 - - Google Patents
Info
- Publication number
- JPS6211316Y2 JPS6211316Y2 JP4132782U JP4132782U JPS6211316Y2 JP S6211316 Y2 JPS6211316 Y2 JP S6211316Y2 JP 4132782 U JP4132782 U JP 4132782U JP 4132782 U JP4132782 U JP 4132782U JP S6211316 Y2 JPS6211316 Y2 JP S6211316Y2
- Authority
- JP
- Japan
- Prior art keywords
- engine
- valve
- throttle valve
- air supply
- temperature
- 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 4
- 239000000446 fuel Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
Landscapes
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Description
【考案の詳細な説明】
本考案は内燃機関の始動性補助装置に係わり、
特に高温時の再始動性補償装置に関する。[Detailed description of the invention] The present invention relates to a startability assisting device for an internal combustion engine.
In particular, it relates to a restartability compensator at high temperatures.
機関温度が高い時に機関を停止すると気化器は
高温となつているために燃料がメインノズルから
断続的に吐出したり、あるいはフロート室内の蒸
発燃料がエアベントなどから吸気通路内に流出し
て吸気通路内に充満する。このような状態で再び
機関を始動すると機関シリンダ内に供給される混
合気が過濃となるために始動が困難となり、たと
え始動されてもアイドリング運転が不安定となり
機関が停止してしまう。従来、係る不具合を解決
するためにスロツトル弁下流の吸気通路内に補助
空気を供給するホツトアイドルコンペンセータ装
置が知られている。しかしながら、係る装置では
機関始動後にも必要以上の空気が供給されるため
混合気が過薄になり、アイドリング不安定となつ
て機関が停止してしまうという欠点がある。 If you stop the engine when the engine temperature is high, the carburetor will be at a high temperature, so fuel may be intermittently discharged from the main nozzle, or evaporated fuel in the float chamber may flow into the intake passage from an air vent, etc. filled within. If the engine is started again in such a state, the air-fuel mixture supplied into the engine cylinders becomes too rich, making it difficult to start, and even if the engine is started, idling becomes unstable and the engine stops. Conventionally, in order to solve this problem, a hot idle compensator device is known that supplies auxiliary air into the intake passage downstream of the throttle valve. However, such a system has the disadvantage that even after the engine has started, more air than necessary is supplied, resulting in an excessively lean air-fuel mixture, resulting in unstable idling and the engine stopping.
本考案の目的は高温再始動時に限りスロツトル
弁下流の吸気通路内に補助空気を供給して始動を
促進し、かつ機関始動後は速やかに補助空気の供
給を停止して安定したアイドリング運転ができる
内燃機関の再始動性補償装置を提供するにある。 The purpose of this invention is to supply auxiliary air into the intake passage downstream of the throttle valve only when the engine is restarted at a high temperature to facilitate the start, and to quickly stop the supply of auxiliary air after the engine has started to enable stable idling. An object of the present invention is to provide a restartability compensating device for an internal combustion engine.
係る目的は、本考案によれば機関始動時にスロ
ツトル弁と協動するレバーに係合して前記スロツ
トル弁を開弁せしめるダイヤフラム装置を遅延装
置を介して前記スロツトル弁下流の吸気通路に連
通する一方、該吸気通路内に開口する補助空気供
給ポートを補助空気供給通路を介して大気に連通
するとともに、該補助空気供給通路内に機関又は
機関周囲の温度に応動する感温弁装置と前記補助
空気供給通路を開閉制御する開閉弁とを設け、高
温再始動時に前記スロツトル弁を開弁するととも
に、前記補助空気供給通路内に大気を導入し、機
関始動後は前記開閉弁を閉弁したのち前記ダイヤ
フラム装置と前記レバーとの係合を解除する如く
構成された内燃機関の再始動性補償装置によつて
達成される。 According to the present invention, the diaphragm device which engages a lever that cooperates with the throttle valve to open the throttle valve when starting the engine is communicated with the intake passage downstream of the throttle valve via the delay device. , an auxiliary air supply port opened in the intake passage communicates with the atmosphere via an auxiliary air supply passage, and a temperature-sensitive valve device responsive to the temperature of the engine or the surroundings of the engine and the auxiliary air provided in the auxiliary air supply passage. An on-off valve for controlling opening and closing of the supply passage is provided, and at the time of high temperature restart, the throttle valve is opened and atmospheric air is introduced into the auxiliary air supply passage, and after the engine is started, the on-off valve is closed and then the throttle valve is opened. This is accomplished by means of an internal combustion engine restartability compensator configured to disengage the diaphragm device from the lever.
以下、添付図面を参照して本考案を詳細に説明
する。第１図においてスロツトル弁軸２に回転可
能に取り付けられたレバー３は、スロツトル弁１
と一体となつて回動する。ダイヤフラム装置４は
ダイヤフラム４ａ，スプリング４ｂ，ロツド４ｃ
並びに負圧室４ｄより構成され、スプリング４ｂ
のバネ定数はスロツトル弁１のリターンスプリン
グ５よりも強く設定されており、従つて始動時に
はロツド４ｃが付勢されてレバー３に当接し、ス
ロツトル弁１は所定開度開弁している。負圧室４
ｄは遅延装置６を介して吸気通路７に連通し、遅
延装置６は傘バルブ６ａとこれに続く第１絞り６
ｃ並びに第１絞り６ｃと並列に配設された第２絞
り６ｂより構成されている。傘バルブ６ａは負圧
室４ｄから吸気通路７へ向う流れのみ許すよう配
設されているので、負圧室４ｄに作用する吸気管
負圧は第１及び第２絞りを介して作用し、従つて
これらの開口面積で決まる時間だけ遅延される。
一方、感温弁装置８はバイメタル８ａとこのバイ
メタル８ａにより駆動される弁体８ｂにより構成
され、所定温度以上で弁ポート８ｃを開いて大気
導入口８ｄより大気を導入する。なお、弁体８ｂ
は第２図に示すようなテーパ弁であつてよい。斯
くすると機関温度に応じた大気が供給できるので
より適切な空燃比が得られる。弁ポート８ｃは開
閉弁９を介してスロツトル弁下流の吸気通路内に
開口する補助空気供給ポート１０に連通する。１
１は補助空気供給通路である。開閉弁９は弁体９
ａとこの弁体９ａを保持するダイヤフラム９ｂ及
び弁体９ａを押し上げてポート９ｃを常に開放す
る方向に付勢するスプリング９ｄより構成され
る。９ｅはスプリング９ｄを収納する負圧室であ
り、９ｆはダイヤフラム９ｂの呼吸作用を助ける
大気穴である。負圧室９ｅは一方向遅延装置１２
を介して吸気通路７に連通する。一方向遅延装置
１２は傘バルブ１２ａと絞り１２ｂとより構成さ
れ、傘バルブ１２ａは開閉弁９から吸気通路７へ
向う流れのみ許すよう配置されている。 Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In FIG. 1, a lever 3 rotatably attached to the throttle valve shaft 2 is connected to the throttle valve 1
It rotates as one. The diaphragm device 4 includes a diaphragm 4a, a spring 4b, and a rod 4c.
and a negative pressure chamber 4d, and a spring 4b.
The spring constant of is set to be stronger than the return spring 5 of the throttle valve 1, and therefore, at the time of starting, the rod 4c is biased and comes into contact with the lever 3, and the throttle valve 1 is opened to a predetermined opening degree. Negative pressure chamber 4
d communicates with an intake passage 7 via a delay device 6, and the delay device 6 connects an umbrella valve 6a and a first throttle 6 following it.
c and a second aperture 6b arranged in parallel with the first aperture 6c. Since the umbrella valve 6a is arranged to only allow flow from the negative pressure chamber 4d toward the intake passage 7, the intake pipe negative pressure acting on the negative pressure chamber 4d acts through the first and second throttles, and Then, the time delay is determined by the area of these openings.
On the other hand, the temperature-sensitive valve device 8 is composed of a bimetal 8a and a valve body 8b driven by the bimetal 8a, and opens the valve port 8c at a predetermined temperature or higher to introduce atmospheric air through the atmospheric air inlet 8d. In addition, the valve body 8b
may be a tapered valve as shown in FIG. In this way, air can be supplied in accordance with the engine temperature, so a more appropriate air-fuel ratio can be obtained. The valve port 8c communicates via an on-off valve 9 with an auxiliary air supply port 10 that opens into the intake passage downstream of the throttle valve. 1
1 is an auxiliary air supply passage. The on-off valve 9 is a valve body 9
a, a diaphragm 9b that holds the valve body 9a, and a spring 9d that biases the valve body 9a in a direction to always open the port 9c. 9e is a negative pressure chamber that accommodates a spring 9d, and 9f is an air hole that helps the breathing action of the diaphragm 9b. Negative pressure chamber 9e has one-way delay device 12
It communicates with the intake passage 7 via. The one-way delay device 12 is composed of an umbrella valve 12a and a throttle 12b, and the umbrella valve 12a is arranged to allow only flow from the opening/closing valve 9 toward the intake passage 7.
機関温度が高温であつてかつ機関停止時には図
に示すように感温弁装置８が弁ポート８ｃを開放
するとともに開閉弁９が補助空気供給通路１１を
開放して大気が吸気通路７に流入できる状態にな
つている。一方スプリング４ｂの付勢力はリター
ンスプリング５のバネ力に打ち勝つてスロツトル
弁１を所定開度開いている。この状態で機関を始
動すると大気が吸気通路内に吸入されて始動に好
適な空燃比が得られ、斯くして機関は速やかに始
動する。 When the engine temperature is high and the engine is stopped, the temperature-sensitive valve device 8 opens the valve port 8c as shown in the figure, and the on-off valve 9 opens the auxiliary air supply passage 11, allowing atmospheric air to flow into the intake passage 7. It is becoming a state. On the other hand, the biasing force of the spring 4b overcomes the spring force of the return spring 5 to open the throttle valve 1 to a predetermined opening degree. When the engine is started in this state, atmospheric air is sucked into the intake passage to obtain an air-fuel ratio suitable for starting, and the engine starts quickly.
機関が始動すると吸気管負圧が上昇して高負圧
が開閉弁９の負圧室９ｅに作用し、従つてポート
９ｃが即座に閉鎖され、斯くして大気の吸入が遮
断される。補助空気供給通路１１が遮断されたの
ち所定時間後には高負圧がダイヤフラム装置４の
負圧室４ｄに作用してロツド４ｃとレバー３との
係合を解除し、斯くしてスロツトル弁１はアイド
ル開度に戻される。 When the engine is started, the negative pressure in the intake pipe increases and a high negative pressure acts on the negative pressure chamber 9e of the on-off valve 9, so that the port 9c is immediately closed, thus cutting off the intake of atmospheric air. After a predetermined period of time after the auxiliary air supply passage 11 is cut off, high negative pressure acts on the negative pressure chamber 4d of the diaphragm device 4 to release the engagement between the rod 4c and the lever 3, and thus the throttle valve 1 is opened. Returns to idle opening.
以上のように本考案によれば速やかな始動性が
得られ、始動したのちには即座に大気の吸入を遮
断するので安定したアイドリング運転ができる。
また、補助空気供給通路が遮断されたのちも所定
時間はスロツトル弁が開弁して機関回転数が上昇
しているので、空燃比変化が生じるにもかかわら
ず安定したアイドリング運転ができる。さらに始
動時にスロツトル弁を開くように構成したので、
感温弁装置あるいは開閉弁の生産上のバラツキ等
によつて吸気空気量がバラツイても始動性は全く
阻害されることがない。 As described above, according to the present invention, quick startability can be obtained, and since the intake of atmospheric air is immediately shut off after starting, stable idling operation can be achieved.
Furthermore, even after the auxiliary air supply passage is shut off, the throttle valve remains open for a predetermined period of time and the engine speed increases, so stable idling operation is possible despite changes in the air-fuel ratio. Furthermore, since the throttle valve was configured to open at startup,
Even if the amount of intake air varies due to production variations in the temperature-sensitive valve device or on-off valve, the startability is not hindered at all.
第１図は本考案に係わる実施例である。第２図
は感温弁装置の変形例である。
１……スロツトル弁、４……ダイヤフラム装
置、６……遅延装置、８……感温弁装置、９……
開閉弁。
FIG. 1 shows an embodiment of the present invention. FIG. 2 shows a modification of the temperature-sensitive valve device. 1... Throttle valve, 4... Diaphragm device, 6... Delay device, 8... Temperature sensing valve device, 9...
Open/close valve.
Claims (1)
係合して前記スロツトル弁を開弁せしめるダイヤ
フラム装置を遅延装置を介して前記スロツトル弁
下流の吸気通路に連通する一方、該吸気通路内に
開口する補助空気供給ポートを補助空気供給通路
を介して大気に連通するとともに、該補助空気供
給通路内に機関又は機関周囲の温度に応動する感
温弁装置と前記補助空気供給通路を開閉制御する
開閉弁とを設け、高温再始動時に前記スロツトル
弁を開弁するとともに、前記吸気通路内に大気を
導入し、機関始動後は前記開閉弁を閉弁したのち
前記ダイヤフラム装置と前記レバーとの係合を解
除することを特徴とする内燃機関の再始動性補償
装置。 A diaphragm device that engages with a lever that cooperates with the throttle valve to open the throttle valve when starting the engine is communicated with an intake passage downstream of the throttle valve via a delay device, and an auxiliary device that opens into the intake passage. The air supply port communicates with the atmosphere through an auxiliary air supply passage, and the auxiliary air supply passage includes a temperature-sensitive valve device that responds to the temperature of the engine or the surroundings of the engine, and an on-off valve that controls opening and closing of the auxiliary air supply passage. The throttle valve is opened when the engine is restarted at a high temperature, and atmospheric air is introduced into the intake passage, and after the engine is started, the on-off valve is closed and the engagement between the diaphragm device and the lever is released. A restartability compensation device for an internal combustion engine, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4132782U JPS58144050U (en) | 1982-03-23 | 1982-03-23 | Restartability compensation device for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4132782U JPS58144050U (en) | 1982-03-23 | 1982-03-23 | Restartability compensation device for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58144050U JPS58144050U (en) | 1983-09-28 |
| JPS6211316Y2 true JPS6211316Y2 (en) | 1987-03-17 |
Family
ID=30052510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4132782U Granted JPS58144050U (en) | 1982-03-23 | 1982-03-23 | Restartability compensation device for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58144050U (en) |
-
1982
- 1982-03-23 JP JP4132782U patent/JPS58144050U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58144050U (en) | 1983-09-28 |
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