JP3698053B2 - Fuel rail integrated intake system - Google Patents

Fuel rail integrated intake system Download PDF

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Publication number
JP3698053B2
JP3698053B2 JP2000377981A JP2000377981A JP3698053B2 JP 3698053 B2 JP3698053 B2 JP 3698053B2 JP 2000377981 A JP2000377981 A JP 2000377981A JP 2000377981 A JP2000377981 A JP 2000377981A JP 3698053 B2 JP3698053 B2 JP 3698053B2
Authority
JP
Japan
Prior art keywords
fuel rail
intake manifold
injector
holding portion
fuel
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 - Fee Related
Application number
JP2000377981A
Other languages
Japanese (ja)
Other versions
JP2002180922A (en
Inventor
明広 棟方
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2000377981A priority Critical patent/JP3698053B2/en
Publication of JP2002180922A publication Critical patent/JP2002180922A/en
Application granted granted Critical
Publication of JP3698053B2 publication Critical patent/JP3698053B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

Description

【0001】
【発明の属する技術分野】
この発明は、フューエルインジェクタを装着するフューエルレールが設けられたインテークマニホールドを備えたエンジンの吸気装置に関する。
【0002】
【従来の技術】
フューエルレールの取付けは、まずフューエルインジェクタをフューエルレールに挿入、その後インジェクタをインテークマニホールドに挿入しフューエルレールの固定ブラケットをインテークマニホールドにねじ止めしている。
【0003】
【発明が解決しようとする課題】
従来の組付け方法では、フューエルレール固定用のボルトとインテークマニホールド側のインサートナットが必要である。またインジェクタの取付けにねじ止め作業が必要である。
【0004】
本発明は部品点数削減及び組付け作業の効率向上を目的とする。
【0005】
【課題を解決するための手段】
上記目的を達成するために、本発明は以下のように構成した。
【0006】
複数の樹脂成形パーツが溶着されて形成されるインテークマニホールドを備え、溶着部には円筒半割状のフューエルレール保持部が備えられ、フューエルレールは前記保持部で回転可能に保持される。
【0007】
【発明の実施の形態】
(実施例)
以下、本発明を図面を用いて説明する。図1はインジェクタ3,フューエルレール2が装着されたインテークマニホールド1の外観図を示している。インジェクタ3は一本の円筒状フューエルレール2に直交して伸びたパイプとインテークマニホールドの間に挟まれるように装着される。
【0008】
図2は図1のA−A断面図を示している。フューエルレール2はインテークマニホールド1を構成するインマニアッパ10とインマニロア20のレール保持部10a及び20aに挟まれ回転可能に一体成形される。
【0009】
図3は図2のインジェクタ装着過程を示している。インジェクタ3は一方をシールゴム(ロア)4が装着されたインテークマニホールド1に挿入後、少し傾けてもう一方をシールゴム(アッパ)5が装着されたフューエルレール2にレールを回転させながら挿入する。
【0010】
図4は図1のB−B断面図を示している。フューエルレール保持部10aと
20aの接合面に段差が設けられ、一方フューエルレール2の外周にはクサビ状の突起2aが設けられており、インジェクタ3装着後はシールゴムの反力によりクサビ状突起2aがレール保持部の段差に入り込み、フューエルレール外れ方向には回転しない構造になっている。
【0011】
図5は図1のB−B断面図であり図4とは違った回転規制構造を示している。フューエルレール保持部10a,20aに溝が設けられ、一方フューエルレール2外周には二面幅2bの平面が設けられており、インジェクタ3装着後はシールゴムの反力により二面幅がレール保持部の溝にはまり込み、フューエルレールが回転しない構造になっている。
【0012】
【発明の効果】
本発明によればフューエルレール固定用のボルトとインテークマニホールド側のインサートナットを廃止でき、またインジェクタの取付けはフューエルレールを回転させるだけで良くねじ止め作業が廃止できる。
【図面の簡単な説明】
【図1】インジェクタ及びフューエルレールが装着されたインテークマニホールド外観図。
【図2】インテークマニホールド及びインジェクタの断面図。
【図3】インテークマニホールド及びインジェクタの断面図。
【図4】インテークマニホールドのフューエルレール保持部断面図。
【図5】インテークマニホールドのフューエルレール保持部断面図。
【符号の説明】
1…インテークマニホールド、2…フューエルレール、2a…フューエルレール外周突起部、2b…フューエルレール外周二面幅、3…インジェクタ、4…シールゴム(ロア)、5…シールゴム(アッパ)、10…インマニアッパ、20…インマニロア、10a,20a…フューエルレール保持部。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an intake device for an engine provided with an intake manifold provided with a fuel rail for mounting a fuel injector.
[0002]
[Prior art]
The fuel rail is attached by first inserting the fuel injector into the fuel rail, then inserting the injector into the intake manifold, and fixing the fuel rail fixing bracket to the intake manifold with screws.
[0003]
[Problems to be solved by the invention]
The conventional assembly method requires a bolt for fixing the fuel rail and an insert nut on the intake manifold side. Also, screwing work is required to install the injector.
[0004]
An object of the present invention is to reduce the number of parts and improve the efficiency of assembly work.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is configured as follows.
[0006]
An intake manifold formed by welding a plurality of resin molded parts is provided, a welded portion is provided with a cylindrical half-split fuel rail holding portion, and the fuel rail is rotatably held by the holding portion.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
(Example)
Hereinafter, the present invention will be described with reference to the drawings. FIG. 1 shows an external view of an intake manifold 1 to which an injector 3 and a fuel rail 2 are attached. The injector 3 is mounted so as to be sandwiched between a pipe extending perpendicularly to one cylindrical fuel rail 2 and the intake manifold.
[0008]
FIG. 2 shows a cross-sectional view taken along the line AA of FIG. The fuel rail 2 is sandwiched between the rail holders 10a and 20a of the intake manifold 10 and the intake manifold 20 constituting the intake manifold 1, and is integrally formed to be rotatable.
[0009]
FIG. 3 shows the injector mounting process of FIG. One of the injectors 3 is inserted into the intake manifold 1 to which a seal rubber (lower) 4 is attached, and then the other is inserted into the fuel rail 2 to which the seal rubber (upper) 5 is attached while rotating the rail.
[0010]
FIG. 4 shows a cross-sectional view taken along the line BB in FIG. A step is provided on the joint surface between the fuel rail holding portions 10a and 20a. On the other hand, a wedge-shaped projection 2a is provided on the outer periphery of the fuel rail 2. After the injector 3 is mounted, the wedge-shaped projection 2a is formed by the reaction force of the seal rubber. It has a structure that enters the step of the rail holding portion and does not rotate in the direction away from the fuel rail.
[0011]
5 is a cross-sectional view taken along the line BB in FIG. 1 and shows a rotation restricting structure different from that in FIG. The fuel rail holding portions 10a and 20a are provided with grooves, while the outer periphery of the fuel rail 2 is provided with a flat surface having a two-surface width of 2b. After the injector 3 is mounted, the two-surface width of the rail holding portion is It fits in the groove and the fuel rail does not rotate.
[0012]
【The invention's effect】
According to the present invention, the bolt for fixing the fuel rail and the insert nut on the intake manifold side can be eliminated, and the injector can be attached only by rotating the fuel rail, and the screwing operation can be eliminated.
[Brief description of the drawings]
FIG. 1 is an external view of an intake manifold equipped with an injector and a fuel rail.
FIG. 2 is a cross-sectional view of an intake manifold and an injector.
FIG. 3 is a cross-sectional view of an intake manifold and an injector.
FIG. 4 is a cross-sectional view of a fuel rail holding portion of the intake manifold.
FIG. 5 is a cross-sectional view of a fuel rail holding portion of the intake manifold.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Intake manifold, 2 ... Fuel rail, 2a ... Fuel rail outer periphery protrusion part, 2b ... Fuel rail outer periphery two surface width, 3 ... Injector, 4 ... Seal rubber (lower), 5 ... Seal rubber (upper), 10 ... Inmania pad, 20 ... Inmaniloa, 10a, 20a ... Fuel rail holding part.

Claims (3)

インジェクタに燃料を供給するフューエルレールが装着されたインテークマニホールドにおいて、前記インテークマニホールドは複数に分割され各々単体で樹脂成形されたパーツを溶着して形成されており、分割面に円筒半割状の前記フューエルレールの保持部を備え、前記フューエルレールを前記保持部に回転可能に保持したことを特徴とするフューエルレール一体型吸気装置。In an intake manifold having a fuel rail for supplying fuel to an injector, the intake manifold is divided into a plurality of parts, each of which is formed by welding a single resin-molded part. A fuel rail integrated intake device comprising a fuel rail holding portion, wherein the fuel rail is rotatably held by the holding portion. 請求項1に記載のものにおいて、前記フューエルレールの回転方向を規制する規制部を前記保持部とフューエルレールとの間に設けたことを特徴とするフューエルレール一体型吸気装置。2. The fuel rail integrated intake device according to claim 1, wherein a restricting portion for restricting a rotation direction of the fuel rail is provided between the holding portion and the fuel rail. 請求項1に記載のものにおいて、前記フューエルレール保持部内面に溝を設け、保持される前記フューエルレールの外周には前記溝に入る二面を持つ突起を設けインジェクタ装着時に前記フューエルレールの突起が前記溝部に入ることにより前記フューエルレールの回転を防止したことを特徴とする吸気装置。2. The fuel rail according to claim 1, wherein a groove is provided on the inner surface of the fuel rail holding portion, and a protrusion having two surfaces entering the groove is provided on an outer periphery of the fuel rail to be held, and the protrusion of the fuel rail is provided when the injector is mounted. An air intake apparatus wherein rotation of the fuel rail is prevented by entering the groove.
JP2000377981A 2000-12-07 2000-12-07 Fuel rail integrated intake system Expired - Fee Related JP3698053B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000377981A JP3698053B2 (en) 2000-12-07 2000-12-07 Fuel rail integrated intake system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000377981A JP3698053B2 (en) 2000-12-07 2000-12-07 Fuel rail integrated intake system

Publications (2)

Publication Number Publication Date
JP2002180922A JP2002180922A (en) 2002-06-26
JP3698053B2 true JP3698053B2 (en) 2005-09-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000377981A Expired - Fee Related JP3698053B2 (en) 2000-12-07 2000-12-07 Fuel rail integrated intake system

Country Status (1)

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4700575B2 (en) * 2006-08-03 2011-06-15 株式会社ケーヒン Fuel distribution piping structure in multiple throttle bodies
JP4700576B2 (en) * 2006-08-03 2011-06-15 株式会社ケーヒン Fuel distribution piping structure in multiple throttle bodies

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0643462Y2 (en) * 1985-01-23 1994-11-14 マツダ株式会社 Engine intake system
JP3084899B2 (en) * 1992-03-31 2000-09-04 株式会社デンソー Fuel supply device for internal combustion engine
US5465699A (en) * 1993-06-01 1995-11-14 Volkswagen Ag Intake pipe arrangement for an internal combustion engine having individual arc-shaped cylinder intake pipes
JP3166475B2 (en) * 1994-04-28 2001-05-14 トヨタ自動車株式会社 Idle position detection device for internal combustion engine
US5682859A (en) * 1996-01-22 1997-11-04 Siemens Automotive Corporation Method and arrangement for mounting fuel rails
JP3808352B2 (en) * 2001-10-19 2006-08-09 愛三工業株式会社 Intake manifold

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