JPH02256838A - Throttle body for fuel injection engine - Google Patents

Throttle body for fuel injection engine

Info

Publication number
JPH02256838A
JPH02256838A JP1075782A JP7578289A JPH02256838A JP H02256838 A JPH02256838 A JP H02256838A JP 1075782 A JP1075782 A JP 1075782A JP 7578289 A JP7578289 A JP 7578289A JP H02256838 A JPH02256838 A JP H02256838A
Authority
JP
Japan
Prior art keywords
fuel
fuel injection
throttle body
injection valve
valve
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.)
Granted
Application number
JP1075782A
Other languages
Japanese (ja)
Other versions
JP2709133B2 (en
Inventor
Yasuhiro Toyoda
泰弘 豊田
Tomio Aoi
青井 富男
Toshihiro Kameda
亀田 敏洋
Kiyohide Nagase
永瀬 清英
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP1075782A priority Critical patent/JP2709133B2/en
Priority to US07/500,656 priority patent/US5094212A/en
Publication of JPH02256838A publication Critical patent/JPH02256838A/en
Application granted granted Critical
Publication of JP2709133B2 publication Critical patent/JP2709133B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Abstract

PURPOSE:To reduce the number of high pressure pipes and the manufacturing cost, and enable the grouped constitution of each equipment. CONSTITUTION:Fuel is sucked from an upper hose inlet 9a and a fuel excess is discharged from a lower hose outlet 9b. A fuel passage for a fuel injection valve 7 is formed integrally with the external surface of a throttle body 1, and comprises a feed passage 10 for supplying high pressure fuel delivered from a fuel pump 6 to the fuel injection valve 7, and a return passage 11 for returning a fuel excess not delivered from the fuel injection valve 7 to a fuel tank. Constant pressure applies to the fuel injection valve 7 via the operation of an adjustment valve 12 fitted to the return passage 11. According to the aforesaid construction, the length of a tube between the fuel pump 8 and the fuel injection valve 7 can be shortened by integrating the fuel pump 8 with the throttle body 1.

Description

【発明の詳細な説明】 [発明の目的] 〈産業上の利用分野〉 本発明は、燃料噴射エンジンの吸気ポートへ燃料と空気
とを混合して送給するだめのスロットルボディに関する
DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] <Industrial Application Field> The present invention relates to a throttle body for feeding a mixture of fuel and air to an intake port of a fuel injection engine.

〈従来の技術〉 電子制御式燃料噴射エンジンに於いては、螺形弁などか
らなるスロットル弁を備えたスロットルボディを吸気通
路に設け、これによって吸入空気流量を人為的に制御す
ると共に、スロットル弁開度・吸気負圧・吸気温度など
の各種情報により得られたエンジンの負荷情況に応じて
設定された適量の燃料を、電気的な制御にて吸気通路中
に噴射するものとしている。このような燃料噴射装置と
して、スロットルボディに燃料噴射弁を備えた所謂シン
グルポイント式燃料噴射装置が知られている。この方式
によれば、各気筒に燃料噴射弁を備えたマルチポイント
式に比較して紙庫なシステムを構成することができる(
特開昭58−122358号公報など参照)。
<Prior Art> In an electronically controlled fuel injection engine, a throttle body equipped with a throttle valve such as a spiral valve is provided in the intake passage, and the intake air flow rate is artificially controlled by this, and the throttle body is equipped with a throttle valve such as a spiral valve. An appropriate amount of fuel is injected into the intake passage under electrical control, set according to the engine load situation obtained from various information such as opening, intake negative pressure, and intake air temperature. As such a fuel injection device, a so-called single point fuel injection device in which a throttle body is provided with a fuel injection valve is known. According to this method, it is possible to construct a paper storage system compared to a multi-point type in which each cylinder has a fuel injection valve (
(See Japanese Unexamined Patent Publication No. 122358/1983, etc.).

一方、吸気通路へ向けて燃料を所定の圧力をもって噴射
するためには、タンクから燃料を圧送するためのポンプ
装置と、燃料圧力を調整するための調圧弁とが必要であ
る。
On the other hand, in order to inject fuel at a predetermined pressure toward the intake passage, a pump device for pumping the fuel from the tank and a pressure regulating valve for adjusting the fuel pressure are required.

く発明が解決しようとする課題〉 しかるに、車輌に於いては、エンジン本体と燃料タンク
とは隔置されることが通例であり、従来、燃料ポンプは
燃料タンク内に配設されることが一般的であった。その
ため、燃料ポンプと燃料噴射弁との間を連結する高圧配
管が比較的長くなり、製造コストが高騰しがちであった
Problems to be Solved by the Invention> However, in a vehicle, the engine body and the fuel tank are usually separated, and conventionally, the fuel pump has generally been disposed inside the fuel tank. It was a target. Therefore, the high-pressure piping connecting the fuel pump and the fuel injection valve becomes relatively long, which tends to increase manufacturing costs.

本発明は、このような不都合を改善すべくなされたもの
であり、その主な目的は、高圧配管を削減して製造コス
トを低減し、かつ各機器を集約して構成を簡略化するこ
とが可能なスロットルボディを提供することにある。
The present invention was made to improve these inconveniences, and its main objectives are to reduce manufacturing costs by reducing high-pressure piping, and to simplify the configuration by consolidating various devices. Our goal is to provide a throttle body that is possible.

[発明の構成] 〈課題を解決するための手段〉 このような目的は、本発明によれば、燃料噴射エンジン
の吸気ポートへ燃料と空気とを混合して送給するための
スロットルボディであって、スロットル弁と、燃料噴射
弁と、燃料調圧弁と、燃料ポンプとを一体的に設けてな
ることを特徴とする燃料噴射エンジン用スロットルボデ
ィを提供することにより達成される。特に、前記燃料調
圧弁のリリーフ通路を、前記燃料ポンプのモータケーシ
ングの内部に連通させるようにすると良い。
[Structure of the Invention] <Means for Solving the Problems> According to the present invention, the object is to provide a throttle body for feeding a mixture of fuel and air to an intake port of a fuel injection engine. The present invention is achieved by providing a throttle body for a fuel injection engine, characterized in that a throttle valve, a fuel injection valve, a fuel pressure regulating valve, and a fuel pump are integrally provided. In particular, it is preferable that the relief passage of the fuel pressure regulating valve communicates with the inside of the motor casing of the fuel pump.

く作用〉 このように、スロットル弁及び燃料噴射弁を備えたスロ
ットルボディに対し、燃料ポンプ及び燃料調圧弁を一体
的に組付けるものとすれば、タンクから噴射弁へと加圧
された燃料を供給するための高圧配管を実質的に皆無に
し得ると共に、混合気の生成に係わる構成要素の集約化
を推進することができる。特に、リリーフ燃料がポンプ
モータの内部を通過するものとすれば、モータを冷却す
ることができる。
As described above, if the fuel pump and fuel pressure regulating valve are integrally assembled to the throttle body equipped with the throttle valve and fuel injection valve, pressurized fuel can be transferred from the tank to the injection valve. The need for high-pressure piping for supply can be substantially eliminated, and the components involved in generating the mixture can be integrated. In particular, if the relief fuel passes through the inside of the pump motor, the motor can be cooled.

〈実施例〉 以下に添附の図面を参照して本発明の好適実施例につい
て詳細に説明する。
<Embodiments> Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

第1図及び第2図は、本発明に基づき構成されたスロッ
トルボディを示している。このスロットルボディ1自体
は、公知形式のものと同様にして、その内部に郭成され
た吸気胴2の中間部にスロットル弁3を備えており、弁
軸4の一端に設けられたスロットルドラム5に巻回され
たスロットルワイヤ6により開弁駆動されて空気流量を
人為的に制御し得るようにされている。
1 and 2 show a throttle body constructed according to the present invention. This throttle body 1 itself is equipped with a throttle valve 3 in the middle part of an intake body 2 formed inside the throttle body 1 in the same manner as in the known type, and a throttle drum 5 provided at one end of a valve shaft 4. The valve is opened by a throttle wire 6 wound around the valve, so that the air flow rate can be artificially controlled.

スロットルボディ1の周壁に於けるスロットル弁3のや
や上流側には、吸気胴2の軸線に対して斜め」三方から
燃料を噴射するように、そのノズル端を吸気胴内面に臨
ませて、燃料噴射弁7が取付けられている。
Slightly upstream of the throttle valve 3 on the peripheral wall of the throttle body 1, a nozzle end is placed facing the inner surface of the intake cylinder so as to inject fuel from three sides obliquely to the axis of the intake cylinder 2. An injection valve 7 is attached.

第2図に併せて示すように、スロットルボディ1の燃料
噴射弁7とは反対側の面には、燃料ポンプ8が取付けら
れている。この燃料ポンプ8は、公知形式の電動式容積
型ポンプであり、第1図の上側のホース口9aから燃料
を吸入し、下側のホース口9bから余剰燃料を吐出する
。尚、余剰燃料は、ポンプモータのコイル周囲を流過し
てモータの冷却を行なうものとされている。
As shown in FIG. 2, a fuel pump 8 is attached to the surface of the throttle body 1 opposite to the fuel injection valve 7. The fuel pump 8 is a known electric displacement pump, which sucks fuel through an upper hose port 9a in FIG. 1 and discharges excess fuel from a lower hose port 9b. Note that the excess fuel is supposed to flow around the coil of the pump motor to cool the motor.

燃料噴射弁7に対する燃料通路は、スロットルボディ1
の外周部に一体的に形成されており、燃料ポンプ8が吐
出した高圧燃料を燃料噴射弁7へと送り込むための供給
通路10と、燃料噴射弁7から吐出されなかった余剰燃
料を燃料タンク(図示せず)へと戻すための戻し通路1
1とからなり、戻し通路11に設けられた調圧弁12に
て一定の圧力が燃料噴射弁7に作用するものとされてい
る。
A fuel passage for the fuel injection valve 7 is connected to the throttle body 1.
A supply passage 10 is integrally formed on the outer circumference of the fuel tank ( Return path 1 for returning to (not shown)
1, and a constant pressure is applied to the fuel injection valve 7 by a pressure regulating valve 12 provided in the return passage 11.

さて、車輌用エンジンの一般的な構成としては、エンジ
ン本体と燃料タンクとは隔置され、燃料ポンプは燃料タ
ンク内に配設されることが通例である。従って、燃料ポ
ンプから吐出された高圧の燃料を燃料噴射弁へ向けて供
給するために、比較的長い高圧配管を施さねばならず、
製造工程が繁雑となりがちであり、かつ製造コストが高
騰しがちであった。そこで本発明に於いては、燃料ポン
プをスロットルボディ1に一体的に設け、燃料ポンプ8
と燃料噴射弁7との間の管路の短寸化を実現している。
Now, as a general configuration of a vehicle engine, the engine body and the fuel tank are usually separated from each other, and the fuel pump is usually disposed within the fuel tank. Therefore, in order to supply high-pressure fuel discharged from the fuel pump toward the fuel injection valve, a relatively long high-pressure pipe must be installed.
The manufacturing process tends to be complicated, and the manufacturing cost tends to rise. Therefore, in the present invention, the fuel pump is provided integrally with the throttle body 1, and the fuel pump 8
The pipe line between the fuel injection valve 7 and the fuel injection valve 7 can be shortened.

[発明の効果] 以」二詳述したように、本発明によれば、燃料ポンプと
燃料噴射弁とをスロットルボディ回りに集約して設ける
ものとしたことから、燃料ポンプから噴射弁へと至る高
圧配管を皆無とすることが可能となり、燃料タンクとエ
ンジン本体との間の燃料配管の耐圧性を考慮する必要が
なくなる。従って、製造工程を簡略化して製造コストを
低減すると共に、エンジン回りの構成を簡潔化するうえ
に極めて効果的である。
[Effects of the Invention] As described in detail below, according to the present invention, the fuel pump and the fuel injection valve are arranged around the throttle body. It becomes possible to eliminate high-pressure piping at all, and there is no need to consider the pressure resistance of the fuel piping between the fuel tank and the engine body. Therefore, it is extremely effective in simplifying the manufacturing process, reducing manufacturing costs, and simplifying the configuration around the engine.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明に基づき構成されたスロットルボディの
全体を示す立面図であり、第2図は第1図の■−■線に
沿う概念的な断面図である。 1・・・スロットルボディ3・・・スロットル弁7・・
・燃料噴射弁   8・・・燃料ポンプ9a・9b・・
・ホース口 10・・・供給通路   11・・・戻し通路12・・
・調圧弁
FIG. 1 is an elevational view showing the entire throttle body constructed according to the present invention, and FIG. 2 is a conceptual cross-sectional view taken along the line ■-■ in FIG. 1... Throttle body 3... Throttle valve 7...
・Fuel injection valve 8...Fuel pump 9a, 9b...
・Hose port 10... Supply passage 11... Return passage 12...
・Pressure regulating valve

Claims (2)

【特許請求の範囲】[Claims] (1)燃料噴射エンジンの吸気ポートへ燃料と空気とを
混合して送給するためのスロットルボディであって、 スロットル弁と、燃料噴射弁と、燃料調圧弁と、燃料ポ
ンプとを一体的に設けてなることを特徴とする燃料噴射
エンジン用スロットルボディ。
(1) A throttle body for feeding a mixture of fuel and air to the intake port of a fuel injection engine, which integrally integrates a throttle valve, a fuel injection valve, a fuel pressure regulating valve, and a fuel pump. A throttle body for a fuel injection engine, characterized by being provided with a throttle body.
(2)前記燃料調圧弁のリリーフ通路が、前記燃料ポン
プのモータケーシングの内部に連通していることを特徴
とする第1請求項に記載の燃料噴射エンジン用スロット
ルボディ。
(2) The throttle body for a fuel injection engine according to claim 1, wherein the relief passage of the fuel pressure regulating valve communicates with the inside of the motor casing of the fuel pump.
JP1075782A 1989-03-28 1989-03-28 Throttle body for fuel injection engine Expired - Lifetime JP2709133B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1075782A JP2709133B2 (en) 1989-03-28 1989-03-28 Throttle body for fuel injection engine
US07/500,656 US5094212A (en) 1989-03-28 1990-03-28 Throttle body assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1075782A JP2709133B2 (en) 1989-03-28 1989-03-28 Throttle body for fuel injection engine

Publications (2)

Publication Number Publication Date
JPH02256838A true JPH02256838A (en) 1990-10-17
JP2709133B2 JP2709133B2 (en) 1998-02-04

Family

ID=13586130

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1075782A Expired - Lifetime JP2709133B2 (en) 1989-03-28 1989-03-28 Throttle body for fuel injection engine

Country Status (1)

Country Link
JP (1) JP2709133B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1096123A1 (en) * 1999-10-26 2001-05-02 Aisan Kogyo Kabushiki Kaisha Fuel supply apparatus for engines
JP2012184730A (en) * 2011-03-07 2012-09-27 Fuji Heavy Ind Ltd Engine driven power generation apparatus
CN103174567A (en) * 2011-12-26 2013-06-26 本田技研工业株式会社 Throttle device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5946362A (en) * 1982-09-07 1984-03-15 Toyota Motor Corp Electronic fuel injection device with acceleration pump
JPS60150464A (en) * 1984-01-18 1985-08-08 Sanshin Ind Co Ltd Deceleration fuel increase device for internal- combustion engine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5946362A (en) * 1982-09-07 1984-03-15 Toyota Motor Corp Electronic fuel injection device with acceleration pump
JPS60150464A (en) * 1984-01-18 1985-08-08 Sanshin Ind Co Ltd Deceleration fuel increase device for internal- combustion engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1096123A1 (en) * 1999-10-26 2001-05-02 Aisan Kogyo Kabushiki Kaisha Fuel supply apparatus for engines
JP2012184730A (en) * 2011-03-07 2012-09-27 Fuji Heavy Ind Ltd Engine driven power generation apparatus
CN103174567A (en) * 2011-12-26 2013-06-26 本田技研工业株式会社 Throttle device
JP2013133733A (en) * 2011-12-26 2013-07-08 Honda Motor Co Ltd Throttle device

Also Published As

Publication number Publication date
JP2709133B2 (en) 1998-02-04

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