JPH0365847U - - Google Patents
Info
- Publication number
- JPH0365847U JPH0365847U JP12720989U JP12720989U JPH0365847U JP H0365847 U JPH0365847 U JP H0365847U JP 12720989 U JP12720989 U JP 12720989U JP 12720989 U JP12720989 U JP 12720989U JP H0365847 U JPH0365847 U JP H0365847U
- Authority
- JP
- Japan
- Prior art keywords
- negative pressure
- intake
- carburetor
- engine
- introduction path
- 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
- 230000001133 acceleration Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
Landscapes
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
Description
第１〜３図は本考案の第１実施例としてのキヤ
ブレタ付きエンジンの燃料制御装置を示すもので
、第１図はその模式的な構成図、第２図はその各
部の動作を示すタイムチヤート、第３図は燃料吐
出特性を示すグラフであり、第４図は本考案の第
２実施例としてのキヤブレタ付きエンジンの燃料
制御装置を示す模式的な構成図であり、第５図は
従来のキヤブレタ付きエンジンの燃料制御装置を
示す模式的な構成図である。
１……燃焼室、２……ピストン、３……吸気通
路、４……吸気弁、５……キヤブレタ、６……電
子制御ユニツト（ＥＣＵ）、７……冷却水温セン
サ、８……スロツトル開度センサ、９……エンジ
ン回転数センサ、１０……加速ポンプ、１１……
冷却水通路、１２……サーモバルブ（第１のサー
モバルブ）、１３……負圧リーク機構としての第
２のサーモバルブ、１４……フロート室、１４ａ
……フロート、１５……ダイヤフラム、１６，１
７……逆止弁、１８ｂ，１８ａ……燃料流路、１
９……サブノズル、２０ａ，２０ｂ……負圧導入
路、２０ｃ……通路、２１ａ……入口、２１ｂ…
…出口、２２ａ，２２ｂ……弁体、２３ａ……入
口、２３ｂ……出口、２４……燃料溜り、２５…
…負圧室、２６……リターンスプリング、２７…
…バキユームソレノイド（電磁バルブ）、２７ａ
……リターンスプリング、２７ｂ……出口、２７
ｃ……弁体、２７ｄ……ソレノイド。
Figures 1 to 3 show a fuel control system for a carbureted engine as a first embodiment of the present invention. Figure 1 is a schematic diagram of the configuration, and Figure 2 is a time chart showing the operation of each part. , FIG. 3 is a graph showing fuel discharge characteristics, FIG. 4 is a schematic configuration diagram showing a fuel control device for a carburetor-equipped engine as a second embodiment of the present invention, and FIG. 5 is a graph showing a conventional fuel control system. FIG. 1 is a schematic configuration diagram showing a fuel control device for a carbureted engine. 1...Combustion chamber, 2...Piston, 3...Intake passage, 4...Intake valve, 5...Carburetor, 6...Electronic control unit (ECU), 7...Cooling water temperature sensor, 8...Throttle opening Degree sensor, 9...Engine speed sensor, 10...Acceleration pump, 11...
Cooling water passage, 12... Thermo valve (first thermo valve), 13... Second thermo valve as a negative pressure leak mechanism, 14... Float chamber, 14a
...Float, 15...Diaphragm, 16,1
7... Check valve, 18b, 18a... Fuel flow path, 1
9...Sub nozzle, 20a, 20b...Negative pressure introduction path, 20c...Passway, 21a...Inlet, 21b...
...Outlet, 22a, 22b... Valve body, 23a... Inlet, 23b... Outlet, 24... Fuel reservoir, 25...
...Negative pressure chamber, 26...Return spring, 27...
... Vacuum solenoid (electromagnetic valve), 27a
...Return spring, 27b...Exit, 27
c... Valve body, 27d... Solenoid.
Claims (1)
の吸気負圧を受けて作動して該キヤブレタからの
噴出燃料量を増加させる加速ポンプと、該吸気通
路から該加速ポンプへポンプ駆動用の吸気負圧を
導入する負圧導入路と、該吸気負圧導入路に介装
されてエンジン温度に応じて低温時には開放し高
温時には閉鎖するサーモバルブとをそなえ、該吸
気負圧導入路に該吸気負圧を適宜リークさせる負
圧リーク機構が設けられていることを特徴とする
、キヤブレタ付きエンジンの燃料制御装置。 In an engine with a carburetor, an acceleration pump is operated in response to negative intake pressure in an intake passage to increase the amount of fuel jetted from the carburetor, and an intake negative pressure for driving the pump is introduced from the intake passage to the acceleration pump. It is equipped with a negative pressure introduction path and a thermovalve that is interposed in the intake negative pressure introduction path and opens at low temperatures and closes at high temperatures depending on the engine temperature, and leaks the intake negative pressure to the intake negative pressure introduction path as appropriate. A fuel control device for an engine with a carburetor, characterized in that it is provided with a negative pressure leak mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12720989U JPH0365847U (en) | 1989-10-31 | 1989-10-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12720989U JPH0365847U (en) | 1989-10-31 | 1989-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0365847U true JPH0365847U (en) | 1991-06-26 |
Family
ID=31674977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12720989U Pending JPH0365847U (en) | 1989-10-31 | 1989-10-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0365847U (en) |
-
1989
- 1989-10-31 JP JP12720989U patent/JPH0365847U/ja active Pending
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