JPS6338379Y2 - - Google Patents
Info
- Publication number
- JPS6338379Y2 JPS6338379Y2 JP1983171886U JP17188683U JPS6338379Y2 JP S6338379 Y2 JPS6338379 Y2 JP S6338379Y2 JP 1983171886 U JP1983171886 U JP 1983171886U JP 17188683 U JP17188683 U JP 17188683U JP S6338379 Y2 JPS6338379 Y2 JP S6338379Y2
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- passage
- injection valve
- fuel injection
- fuel supply
- 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 55
- 238000002347 injection Methods 0.000 claims description 19
- 239000007924 injection Substances 0.000 claims description 19
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 239000002828 fuel tank Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
【考案の詳細な説明】
技術分野
本考案は内燃機関の燃料供給装置、特にSPI
（シングルポイントインジエクシヨン）方式の燃
料供給装置に関する。[Detailed description of the invention] Technical field This invention is a fuel supply system for internal combustion engines, especially SPI.
(single point injection) type fuel supply device.
従来技術
従来この種の燃料供給装置として、例えば第１
図に示すようなものがある。Prior Art Conventionally, as this type of fuel supply device, for example, the first
There is something like the one shown in the figure.
これについて説明すると、スロツトルチヤンバ
１内のスロツトルバルブ２上流の吸気通路にスロ
ツトルチヤンバ１の内壁の一部から突出させた取
付部３が設けられ、この取付部３に燃料噴射弁４
が取付けられている。こうして、燃料噴射弁４は
吸気通路のほぼ中心位置に下向きに配設されてい
る。 To explain this, a mounting part 3 protruding from a part of the inner wall of the throttle chamber 1 is provided in the intake passage upstream of the throttle valve 2 in the throttle chamber 1. 4
is installed. In this way, the fuel injection valve 4 is disposed substantially at the center of the intake passage and faces downward.
スロツトルチヤンバ１の壁部（取付部３）に
は、図外の燃料タンクの燃料を吸入吐出する燃料
ポンプからの配管と接続されて燃料を燃料噴射弁
４へ供給する燃料供給通路５と、燃料噴射弁４か
らの余剰燃料をプレツシヤレギユレータ６に導く
燃料戻し通路７とが形成されている。プレツシヤ
レギユレータ６は設定圧力以上で開いて余剰燃料
を燃料タンクへ戻し、これにより燃料圧力を制御
する。尚、燃料供給通路５は流れ方向に斜め下向
きに、燃料戻し通路７は流れ方向に斜め上向きに
設けられており、燃料供給通路５の最上部からそ
の上方にある燃料戻し通路７の最上部へ空気抜き
穴８が設けられている。 A wall portion (attachment portion 3) of the throttle chamber 1 has a fuel supply passage 5 connected to a pipe from a fuel pump that takes in and discharges fuel from a fuel tank (not shown) and supplies fuel to the fuel injection valve 4. , and a fuel return passage 7 that guides surplus fuel from the fuel injection valve 4 to the pressure regulator 6. The pressure regulator 6 opens above a set pressure to return excess fuel to the fuel tank, thereby controlling the fuel pressure. The fuel supply passage 5 is provided diagonally downward in the flow direction, and the fuel return passage 7 is provided diagonally upward in the flow direction, from the top of the fuel supply passage 5 to the top of the fuel return passage 7 above it. An air vent hole 8 is provided.
９はバイパス式の熱線流量計、１０はスロツト
ルバルブ２をバイパスするバイパス通路、１１は
バイパス通路１０に設けられたアイドル制御弁、
１２はブローバイガス導入パイプである。 9 is a bypass type hot wire flowmeter, 10 is a bypass passage that bypasses the throttle valve 2, 11 is an idle control valve provided in the bypass passage 10,
12 is a blow-by gas introduction pipe.
しかしながら、このような従来の燃料供給装置
にあつては、燃料供給通路５及び燃料戻し通路７
の圧力損失のバラツキ、燃料噴射弁４内の圧力損
失のバラツキ等により、燃料噴射弁４内の燃料圧
力がバラツキをもち、所望の燃料噴射量が得られ
ないという問題点があつた。 However, in such a conventional fuel supply device, the fuel supply passage 5 and the fuel return passage 7
There was a problem in that the fuel pressure within the fuel injection valve 4 varied due to variations in pressure loss within the fuel injection valve 4, variation in pressure loss within the fuel injection valve 4, etc., and a desired fuel injection amount could not be obtained.
考案の目的
本考案はこのような従来の問題点に鑑み、スロ
ツトルチヤンバに形成される燃料供給通路及び燃
料戻し通路の圧力損失のバラツキや燃料噴射弁内
の圧力損失のバラツキに対し、燃料噴射弁内の燃
料圧力を調整可能にすることを目的とする。Purpose of the invention In view of these conventional problems, the present invention solves the problem of the fuel supply passage and the fuel return passage formed in the throttle chamber and the pressure loss inside the fuel injection valve. The purpose is to make it possible to adjust the fuel pressure inside the injection valve.
考案の構成
このため、本考案はスロツトルチヤンバに形成
される燃料供給通路と燃料戻し通路とを燃料噴射
弁をバイパスして連結する空気抜き穴を兼ねるバ
イパス通路を設けると共に、このバイパス通路に
通路断面積を調整するアジヤストスクリユーを設
けたものである。Structure of the invention For this reason, the present invention provides a bypass passage that also serves as an air vent hole that connects the fuel supply passage and the fuel return passage formed in the throttle chamber by bypassing the fuel injection valve, and also provides a bypass passage in this bypass passage. It is equipped with an adjusting screw to adjust the cross-sectional area.
実施例
以下に第２図に示す実施例を説明する。但し、
第２図において第１図と同一部分には同一部分を
付して異なる部分についてのみ説明する。Embodiment The embodiment shown in FIG. 2 will be described below. however,
In FIG. 2, the same parts as those in FIG. 1 are referred to as the same parts, and only the different parts will be explained.
スロツトルチヤンバ１に形成される燃料供給通
路５と燃料戻し通路７との間にこれらを連結する
バイパス通路１３を設けてある。尚、このバイパ
ス通路１３は空気抜き穴を兼ねている。 A bypass passage 13 is provided between a fuel supply passage 5 and a fuel return passage 7 formed in the throttle chamber 1 to connect them. Note that this bypass passage 13 also serves as an air vent hole.
そして、燃料供給通路５の壁部に形成したねじ
孔１４にアジヤストスクリユー１５を螺合して、
アジヤストスクリユー１５の先端の円錐状部分１
５ａをバイパス通路１３に臨ませてあり、アジヤ
ストスクリユー１５のねじ込み量を調整すること
により、バイパス通路１３と円錐状部分１５ａと
の間の環状間隙の断面積が変化するようになつて
いる。１６はスプリングである。 Then, the adjusting screw 15 is screwed into the screw hole 14 formed in the wall of the fuel supply passage 5.
Conical part 1 at the tip of adjustment screw 15
5a faces the bypass passage 13, and by adjusting the screwing amount of the adjusting screw 15, the cross-sectional area of the annular gap between the bypass passage 13 and the conical portion 15a can be changed. . 16 is a spring.
かかる構成によれば、アジヤストスクリー１５
によりバイパス通路１３の通路断面積を変えてバ
イパス流量を調整し、燃料噴射弁４内の流量を調
整することにより、燃料噴射弁４内の燃料圧力を
調整することができる。したがつて、前述の圧力
損失のバラツキによる燃料圧力のバラツキを補正
することができ、これにより所望の燃料噴射量を
得ることが可能となる。 According to this configuration, the adjuster screen 15
By changing the passage cross-sectional area of the bypass passage 13 to adjust the bypass flow rate and adjusting the flow rate within the fuel injection valve 4, the fuel pressure within the fuel injection valve 4 can be adjusted. Therefore, it is possible to correct the variation in fuel pressure due to the above-mentioned variation in pressure loss, thereby making it possible to obtain a desired fuel injection amount.
考案の効果
以上説明したように本考案によれば、前述の圧
力損失のバラツキによる燃料圧力のバラツキをバ
イパス流量を調整することにより補正して、所定
の燃料圧力を得ることができ、燃料噴射量を正確
に調整することが可能となる。Effects of the invention As explained above, according to the invention, by adjusting the bypass flow rate, it is possible to correct the variation in fuel pressure due to the variation in pressure loss described above, and obtain a predetermined fuel pressure. can be adjusted accurately.
第１図は従来例を示すスロツトルチヤンバの断
面図、第２図は本考案の一実施例を示すスロツト
ルチヤンバの断面図である。
１……スロツトルチヤンバ、４……燃料噴射
弁、５……燃料供給通路、６……プレツシヤレギ
ユレータ、７……燃料戻し通路、１３……バイパ
ス通路、１５……アジヤストスクリユー。
FIG. 1 is a cross-sectional view of a throttle chamber showing a conventional example, and FIG. 2 is a cross-sectional view of a throttle chamber showing an embodiment of the present invention. 1... Throttle chamber, 4... Fuel injection valve, 5... Fuel supply passage, 6... Pressure regulator, 7... Fuel return passage, 13... Bypass passage, 15... Adjustment Screw you.
Claims (1)
置に燃料噴射弁を配設し、スロツトルチヤンバの
壁部に、燃料噴射弁への燃料供給通路と、燃料噴
射弁からプレツシヤレギユレータへの燃料戻し通
路とを形成してなる内燃機関の燃料供給装置にお
いて、前記燃料噴射弁をバイパスして前記燃料供
給通路と前記燃料戻し通路とを連絡する空気抜き
穴を兼ねるバイパス通路を設けると共に、このバ
イパス通路に通路断面積を調整するアジヤストス
クリユーを設けたことを特徴とする内燃機関の燃
料供給装置。 The fuel injection valve is arranged approximately at the center of the intake passage in the throttle chamber, and the wall of the throttle chamber has a fuel supply passage to the fuel injection valve and a pressure regulator from the fuel injection valve. In the fuel supply device for an internal combustion engine, a bypass passage is provided that bypasses the fuel injection valve and serves as an air vent hole that connects the fuel supply passage and the fuel return passage; A fuel supply device for an internal combustion engine, characterized in that the bypass passage is provided with an adjusting screw for adjusting the cross-sectional area of the passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17188683U JPS6078980U (en) | 1983-11-08 | 1983-11-08 | Internal combustion engine fuel supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17188683U JPS6078980U (en) | 1983-11-08 | 1983-11-08 | Internal combustion engine fuel supply system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6078980U JPS6078980U (en) | 1985-06-01 |
| JPS6338379Y2 true JPS6338379Y2 (en) | 1988-10-11 |
Family
ID=30374832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17188683U Granted JPS6078980U (en) | 1983-11-08 | 1983-11-08 | Internal combustion engine fuel supply system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6078980U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5879666A (en) * | 1981-10-16 | 1983-05-13 | ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Fuel injector for internal combustion engine |
-
1983
- 1983-11-08 JP JP17188683U patent/JPS6078980U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5879666A (en) * | 1981-10-16 | 1983-05-13 | ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Fuel injector for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6078980U (en) | 1985-06-01 |
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