JPS6329855Y2 - - Google Patents
Info
- Publication number
- JPS6329855Y2 JPS6329855Y2 JP1981149537U JP14953781U JPS6329855Y2 JP S6329855 Y2 JPS6329855 Y2 JP S6329855Y2 JP 1981149537 U JP1981149537 U JP 1981149537U JP 14953781 U JP14953781 U JP 14953781U JP S6329855 Y2 JPS6329855 Y2 JP S6329855Y2
- Authority
- JP
- Japan
- Prior art keywords
- passage
- air
- air flow
- isc
- main passage
- 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
- 239000000446 fuel Substances 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 5
- 241000234435 Lilium Species 0.000 description 2
- 238000000034 method 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】
本考案は熱線式空気流量計とアイドルスピード
制御装置が一体のスロツトルボデイに装着された
燃料供給装置に関するものである。[Detailed Description of the Invention] The present invention relates to a fuel supply system in which a hot wire air flow meter and an idle speed control device are attached to an integrated throttle body.
従来、絞弁をバイパスして空気流量を制御す
る、いわゆるアイドルスピード制御装置（以下
ISCと称す）が動作するのは、機関が無負荷、低
回転の低空気流量時でかつ絞弁がほぼ全閉時のた
め、空気量を検出する熱線式空気流量計はISCを
流れる空気量の影響を大きく受け、また、メイン
吸気通路径が比較的大きなため、ISC空気取入孔
の位置によつて、同一吸入空気量でも熱線出力が
異なつてくる欠点があつた。 Conventionally, so-called idle speed control devices (hereinafter referred to as idle speed control devices) control the air flow rate by bypassing the throttle valve.
The ISC (ISC) operates when the engine is unloaded, the engine is running at low speed, the air flow rate is low, and the throttle valve is almost fully closed. Also, because the main intake passage diameter is relatively large, the hot ray output varies depending on the position of the ISC air intake hole even with the same amount of intake air.
本考案は、ISCの空気取入孔の位置によつて熱
線出力が異なり、真の空気流量を検出できない原
因は、開孔部の位置によつて、メイン通路内の空
気の流れ方に片寄りができ、熱線の配されている
バイアス通路内空気流速がメイン通路内の平均流
速と異なるためで、ISCが動作してバイパスに空
気が流入しても、メイン通路内の空気流の片寄り
を防ぐことを目的としたものである。 In this invention, the hot wire output varies depending on the position of the ISC's air intake hole, and the reason why the true air flow rate cannot be detected is that the air flow in the main passage is biased depending on the position of the hole. This is because the air flow velocity in the bias passage where the hot wire is arranged is different from the average flow velocity in the main passage. The purpose is to prevent
すなわち、ISCの空気取入口をメイン通路の円
周方向のほぼ全周にスリツト状に開孔させること
により、メイン通路の空気流の片寄りをなくした
ものである。 That is, by opening the air intake port of the ISC in the form of a slit around the entire circumference of the main passage, the air flow in the main passage is prevented from being biased.
第１図は特開昭55−69739号公報に見られるよ
うなISCの空気流入孔が丸穴１穴式の構造図を示
す。第２図は本考案によるスリツト環状空気流入
孔をもつ、スロツトルボデイ構造図を示す。 FIG. 1 shows a structural diagram of an ISC with a single round air inflow hole as seen in Japanese Patent Application Laid-Open No. 55-69739. FIG. 2 shows the structure of a throttle body with a slit annular air inlet according to the present invention.
スロツトルボデイ１はメイン通路２、熱線バイ
パス通路３、空気流量を検出する熱線４、絞弁
５、アイドルスピードを制御するISC６、及びそ
れのオリフイス７、ニードル８、バイパス通路
９、空気流入孔１０で構成されている。第１図に
示すように丸穴一穴では絞弁５がほとんど全閉に
近い状態では、空気の流れは矢印で示すように偏
流し、ベンチユリ部１１の圧力が熱線４側に片よ
るため熱線出力が大きくなつてしまう。 The throttle body 1 is composed of a main passage 2, a hot wire bypass passage 3, a hot wire 4 for detecting air flow rate, a throttle valve 5, an ISC 6 for controlling idle speed, an orifice 7 thereof, a needle 8, a bypass passage 9, and an air inflow hole 10. has been done. As shown in FIG. 1, when the throttle valve 5 is almost fully closed in one round hole, the air flow is biased as shown by the arrow, and the pressure in the bench lily part 11 is biased toward the hot wire 4, so the hot wire The output will become large.
本考案による環状スリツト１０′を用いると偏
流がなくなり、ISCを閉じ、絞弁５を開いて空気
量を増大させた時の熱線出力特性とほぼ一致す
る。その試験結果を第３図に示す。 When the annular slit 10' according to the present invention is used, there is no biased flow, and the hot ray output characteristics almost match those when the ISC is closed and the throttle valve 5 is opened to increase the amount of air. The test results are shown in Figure 3.
尚、図中実線はISC全閉で絞弁開度を変えた
時、―‐―線はISC空気流入孔１穴式絞弁開度2゜固
定し、ISCで空気流量を変えた時、−−線は本考
案によるスリツト環状ISC空気流入孔、絞弁開度
2゜固定し、ISCで空気流量を変えた時を示す。 In addition, the solid line in the figure is when the ISC is fully closed and the throttle valve opening is changed, and the line is when the ISC single hole air inlet hole throttle valve opening is fixed at 2 degrees and the air flow rate is changed with ISC. - line is the slit annular ISC air inflow hole according to the present invention, throttle valve opening
The figure shows when the air flow rate is changed using ISC while the angle is fixed at 2°.
本考案によれば、空気流量の精度の良い検出が
できる。 According to the present invention, the air flow rate can be detected with high accuracy.
第１図はISC空気流入孔１穴式のスロツトルボ
デイ構造図、第２図は本考案による環状スリツト
空気流入孔をもつスロツトルボデイ構造図、第３
図は丸穴１穴方式と本考案による熱線出力特性比
較結果を示す図である。
１……スロツトルボデイ、２……メイン通路、
３……熱線バイパス通路、４……熱線、５……絞
弁、６……ISC、７……オリフイス、８……ニー
ドル、９……バイパス通路、１０……空気流入
孔、１１……ベンチユリ部。
Figure 1 is a structural diagram of a throttle body with a single ISC air inlet hole, Figure 2 is a structural diagram of a throttle body with an annular slit air inlet hole according to the present invention, and Figure 3 is a structural diagram of a throttle body with a single ISC air inlet hole.
The figure is a diagram showing a comparison result of the hot wire output characteristics between the one round hole method and the present invention. 1...Throttle body, 2...Main passage,
3... Hot wire bypass passage, 4... Hot wire, 5... Throttle valve, 6... ISC, 7... Orifice, 8... Needle, 9... Bypass passage, 10... Air inflow hole, 11... Bench lily Department.
Claims (1)
その通路内に熱線式空気流量計を配し、その下流
のメイン通路に絞弁を備え、更に、絞弁をバイパ
スする通路を設け、その通路途中に、その通路内
面積を可変にして、機関に吸入される空気量を制
御する装置を有する内燃機関用燃料供給装置にお
いて、メイン通路内に開口している。空気流量を
可変にする装置を有するバイパス通路の空気流入
孔がメイン通路の円周方向にほぼ全周にスリツト
状に開孔していることを特徴とする内燃機関用燃
料供給装置。 A bypass passage is provided in a part of the engine's intake passage,
A hot-wire air flowmeter is arranged in the passage, a throttle valve is provided in the main passage downstream of the hot-wire air flow meter, a passage is provided to bypass the throttle valve, and the internal area of the passage is made variable in the middle of the passage. In a fuel supply system for an internal combustion engine having a device for controlling the amount of air sucked into the main passage, the main passage opens into the main passage. 1. A fuel supply device for an internal combustion engine, characterized in that an air inflow hole of a bypass passage having a device for making the air flow rate variable is opened in the form of a slit almost all the way around the circumference of the main passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14953781U JPS5853851U (en) | 1981-10-09 | 1981-10-09 | Fuel supply system for internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14953781U JPS5853851U (en) | 1981-10-09 | 1981-10-09 | Fuel supply system for internal combustion engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5853851U JPS5853851U (en) | 1983-04-12 |
| JPS6329855Y2 true JPS6329855Y2 (en) | 1988-08-10 |
Family
ID=29942301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14953781U Granted JPS5853851U (en) | 1981-10-09 | 1981-10-09 | Fuel supply system for internal combustion engines |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5853851U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59165862A (en) * | 1983-03-08 | 1984-09-19 | Automob Antipollut & Saf Res Center | Single-point fuel injection device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54158524A (en) * | 1978-06-02 | 1979-12-14 | Hitachi Ltd | Engine suction air volume measuring device for car |
-
1981
- 1981-10-09 JP JP14953781U patent/JPS5853851U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54158524A (en) * | 1978-06-02 | 1979-12-14 | Hitachi Ltd | Engine suction air volume measuring device for car |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5853851U (en) | 1983-04-12 |
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