JP2008513668A - Common rail metal protection device for injected fuel to avoid damage during impact - Google Patents

Common rail metal protection device for injected fuel to avoid damage during impact Download PDF

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JP2008513668A
JP2008513668A JP2007531813A JP2007531813A JP2008513668A JP 2008513668 A JP2008513668 A JP 2008513668A JP 2007531813 A JP2007531813 A JP 2007531813A JP 2007531813 A JP2007531813 A JP 2007531813A JP 2008513668 A JP2008513668 A JP 2008513668A
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common rail
impact
injected fuel
component
reinforcing member
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JP4812766B2 (en
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フェーナンドウ アロンゾウ
オーリーヴェイ デブロ
ジャーク ジオール
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ルノー・エス・アー・エス
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/18—Fuel-injection apparatus having means for maintaining safety not otherwise provided for
    • F02M2200/185—Fuel-injection apparatus having means for maintaining safety not otherwise provided for means for improving crash safety
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Vehicle Body Suspensions (AREA)
  • Air Bags (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

The invention concerns a device for protection (20) against impacts on a common injection manifold (11) mounted on an internal combustion engine, the device being fixed on a component (1) of the engine, and consisting of a metal reinforcement (30) whereof at least two columns (31) dimensioned for impact resistance are proximate to the manifold (11), characterized in that it comprises means for fixing another component on the device.

Description

本発明は、内燃エンジンに取り付けられる噴射燃料用のコモンレールの保護装置に関する。   The present invention relates to a common rail protective device for injected fuel attached to an internal combustion engine.

内燃エンジンに燃料を供給するために用いられる噴射燃料用のコモンレールシステムは、特に燃料噴射器に燃料を供給する、高圧燃料の蓄圧装置（燃料アキュムレータ、すなわちレール）を含む。この噴射燃料用のコモンレールは、エンジンの外側に位置している。例えば、噴射燃料用のコモンレールシステムが装備された自動車の正面衝突に起因する、コモンレールに対する衝撃による燃料の漏洩を回避するためにコモンレールを保護する必要がある。例えば、エンジンに取り付けられた板の形状をなすコモンレールの保護装置が従来から用いられている。このような従来の保護装置は、衝撃に対する抵抗の面のみしか考慮されていないので、完全には満足できるものではない。
ＵＳ ５５３３４８５ ＥＰ １４５７６６３ ＵＳ ６０７６５０５ ＵＳ ６２３７５６９ A common rail system for injected fuel used to supply fuel to an internal combustion engine includes a pressure accumulator (fuel accumulator or rail) for high pressure fuel, particularly for supplying fuel to the fuel injector. The common rail for the injected fuel is located outside the engine. For example, it is necessary to protect the common rail in order to avoid fuel leakage due to an impact on the common rail caused by a frontal collision of an automobile equipped with a common rail system for injected fuel. For example, a common rail protection device in the form of a plate attached to an engine has been conventionally used. Such a conventional protection device is not completely satisfactory because it only considers the impact resistance.
US 5533485 EP 1457663 US 6076505 US 6237469

本発明は、上述の問題を改善することを目的とする。   The present invention aims to ameliorate the above problems.

このため、本発明は、他の構成要素の取り付け手段を有する、内燃エンジンに装着される、噴射燃料用のコモンレールの衝撃に対する保護装置を提供する。   For this reason, this invention provides the protection apparatus with respect to the impact of the common rail for injected fuel with which the attachment means of another component is mounted | worn with an internal combustion engine.

本発明のその他の特徴によれば：
−上記他の構成要素の上記取り付け手段は、部分的にプラスチックから作られ、
−上記他の構成要素の上記取り付け手段は、部分的に金属から作られ、
−上記保護装置は、金属補強部材を含み、
−上記金属補強部材は、金属板からなり、
−上記他の構成要素の上記取り付け手段は、上記金属補強部材の上に成型によって形成されたプラスチックから部分的に作られ、
−上記他の構成要素の上記取り付け手段は、ケーブルを取り付けるための取り付け脚を含み、
−上記他の構成要素は、コイル用の給電モジュールである。 According to other features of the invention:
The attachment means of the other components is partly made of plastic;
The attachment means of the other component is partly made of metal;
The protective device includes a metal reinforcing member;
The metal reinforcing member comprises a metal plate;
The attachment means of the other component is partly made of plastic formed by molding on the metal reinforcing member;
The attachment means of the other component comprises an attachment leg for attaching the cable;
The other component is a power supply module for the coil.

本発明及びその利点は、非限定的な例としてとられ、添付図面によって例示された実施の形態の詳細な説明を読むことによって明らかとなるであろう。これらの図面において：
−図１は、内燃エンジンの構成要素に取り付けられた保護カバーの図であり；
−図２は、組み付けられた図１に示す保護カバーの断面図であり；
−図３は、保護カバーのみの図であり；
−図４は、保護カバーの金属部分の展開図である。 The invention and its advantages are taken as a non-limiting example and will become apparent upon reading the detailed description of the embodiments illustrated by the attached drawings. In these drawings:
-Figure 1 is a view of a protective cover attached to a component of an internal combustion engine;
-Fig. 2 is a cross-sectional view of the protective cover shown in Fig. 1 assembled;
-Figure 3 is a view of the protective cover only;
FIG. 4 is an exploded view of the metal part of the protective cover.

図１、２は、内燃エンジンの構成要素１を示す。この構成要素１は、特に吸気ダクト２を含む鋳造部品である。この構成要素１は、燃料噴射器保持ブロックであることができる。燃料噴射器保持ブロックである構成要素１は、エンジンに取り付けられ、燃料噴射器１０を取り付ける噴射器取り付け孔３を有する。噴射器取り付け孔３は、燃料噴射器保持ブロック（構成要素）１の縦軸に平行な方向に沿って互いに１列に配置される。   1 and 2 show a component 1 of an internal combustion engine. This component 1 is in particular a cast part including an intake duct 2. This component 1 can be a fuel injector holding block. The component 1, which is a fuel injector holding block, is attached to the engine and has an injector mounting hole 3 for mounting a fuel injector 10. The injector mounting holes 3 are arranged in a row along a direction parallel to the longitudinal axis of the fuel injector holding block (component) 1.

噴射燃料用のコモンレール１１は、燃料噴射器１０の上に設けられ、細長い形状のパイプからなる。コモンレール１１は、燃料噴射ポンプ（図示しない）によって加圧された燃料を供給するための供給ポート１２を有し、接続ポート１３を介して燃料を燃料噴射器１０へ配分する。コモンレール１１は、燃料噴射器保持ブロック１の上の、燃料噴射器１０の上に配置される。   The common rail 11 for injected fuel is provided on the fuel injector 10 and is formed of an elongated pipe. The common rail 11 has a supply port 12 for supplying fuel pressurized by a fuel injection pump (not shown), and distributes the fuel to the fuel injectors 10 via the connection port 13. The common rail 11 is disposed on the fuel injector 10 on the fuel injector holding block 1.

図３も参照する。衝撃に対してコモンレール１１を保護するために、例えば保護カバー（保護装置）２０が使用される。   Reference is also made to FIG. In order to protect the common rail 11 against an impact, for example, a protective cover (protective device) 20 is used.

本発明によれば、保護カバー２０は、保護カバー２０の上に、例えばコイル用の給電モジュールの取り付け手段（図示しない）である、他の構成要素の取り付け手段を有する。   According to the present invention, the protective cover 20 has, on the protective cover 20, other means for attaching other components, for example, means for attaching a coil power supply module (not shown).

これらの取り付け手段は、例えばプラスチックの成型によって、部分的にプラスチックで形成することができる。またこれらの取り付け手段は、部分的に金属から形成することもできる。   These attachment means can be partly made of plastic, for example by plastic molding. These attachment means can also be partly made of metal.

この実施の形態においては、保護カバー２０は、衝撃に抵抗するための金属補強部材３０と、金属補強部材３０の上に成型されたプラスチック部４０とを含む。   In this embodiment, the protective cover 20 includes a metal reinforcing member 30 for resisting an impact, and a plastic portion 40 molded on the metal reinforcing member 30.

図４も参照する。金属補強部材３０は、柱状部３１と、支持端部３２と、成型されたプラスチック部４０の補強部３３ａ、３３ｂ、３３ｃと、燃料噴射器保持ブロック１へ保護カバー２０を取り付けるボルト７のための開口３５と、主部３４を含む、切断して折り曲げられた鉄板の板からなる。   Reference is also made to FIG. The metal reinforcing member 30 is for the columnar portion 31, the support end portion 32, the reinforcing portions 33 a, 33 b, 33 c of the molded plastic portion 40, and the bolt 7 that attaches the protective cover 20 to the fuel injector holding block 1. It consists of a steel plate that is cut and bent, including the opening 35 and the main portion 34.

金属補強部材３０を作成する第１工程は、支持端部３２と、柱状部３１と、プラスチック部４０の補強部３３ａ、３３ｂ、３３ｃの範囲を定めるように、金属板を切断することからなる。次に、管形状をなすように柱状部３１を折り曲げる。次に、主部３４に対して概ね９０度になるように柱状部３１を折り曲げ、最後に、主部３４を、折り曲げ線３６に沿って柱状部３１の方向へ９０度以下の角度に折り曲げる。   The first step of creating the metal reinforcing member 30 consists of cutting the metal plate so as to define the ranges of the support end portion 32, the columnar portion 31, and the reinforcing portions 33a, 33b, and 33c of the plastic portion 40. Next, the columnar part 31 is bent so as to form a tube shape. Next, the columnar portion 31 is bent so as to be approximately 90 degrees with respect to the main portion 34, and finally, the main portion 34 is bent along the folding line 36 toward the columnar portion 31 at an angle of 90 degrees or less.

図示された例においては、金属補強部材３０は、２つの柱状部３１と、４つの支持端部３２を有する。支持端部３２の２つは、主部３４が折り曲げられたときに、柱状部３１に対向して配置される。   In the illustrated example, the metal reinforcing member 30 has two columnar portions 31 and four support end portions 32. Two of the support end portions 32 are arranged to face the columnar portion 31 when the main portion 34 is bent.

金属補強部材３０は、柱状部３１の端部と支持端部３２が、燃料噴射器保持ブロックである構成要素１の上に載るＵ字またはＶ字の端部を形成するように、Ｕ字状またはＶ字状に折り曲げられる。   The metal reinforcing member 30 is U-shaped such that the end of the columnar portion 31 and the support end 32 form a U-shaped or V-shaped end that rests on the component 1 that is the fuel injector holding block. Or it is bent into a V shape.

プラスチック部４０は、柱状部３１と支持端部３２とを除いて、金属補強部材３０を包み、保護カバー２０の端に配置された、支持接触面４２と、取り付け脚４３と、支持脚４４とを有する。プラスチック部４０は、金属補強部材３０の周囲にプラスチックを成型することによって作られる。すなわち、最初に金属補強部材３０を型（図示しない）の中に配置し、次いで金属補強部材３０を覆うプラスチックを注入する。金属補強部材３０の上にプラスチックを成型することの利点は、プラスチック部４０が、他の構成要素に関する支持または保持機能を組み入れることを可能にすることにある。例えば、取り付け脚４３は、ケーブル（図示しない）を固定し案内することを可能にする。同様に、例えばコイル用の給電モジュール（図示しない）を取り付けるための支持接触面４２が存在する。   The plastic portion 40, except for the columnar portion 31 and the support end portion 32, encloses the metal reinforcing member 30 and is disposed at the end of the protective cover 20, a support contact surface 42, a mounting leg 43, and a support leg 44. Have The plastic part 40 is made by molding plastic around the metal reinforcing member 30. That is, first, the metal reinforcing member 30 is placed in a mold (not shown), and then plastic covering the metal reinforcing member 30 is injected. The advantage of molding plastic over the metal reinforcement member 30 is that it allows the plastic portion 40 to incorporate support or retention features for other components. For example, the mounting legs 43 allow a cable (not shown) to be fixed and guided. Similarly, there is a support contact surface 42 for attaching, for example, a coil power supply module (not shown).

プラスチック部４０は、プラスチックの成型処理の分野で周知の任意の技術によって作成することができる。   The plastic part 40 can be made by any technique known in the field of plastic molding.

金属補強部材３０は、衝撃時のみならず、支持機能の点でもプラスチック部を補強する。例えば、金属の補強部３３ａは、プラスチックの支持接触面４２を強化する。   The metal reinforcing member 30 reinforces the plastic part not only at the time of impact but also in terms of support function. For example, the metal reinforcing portion 33 a reinforces the plastic support contact surface 42.

燃料噴射器保持ブロック１は、柱状部３１の端部を受けるためのボス５を有する。ボス５は、保護カバー２０を燃料噴射器保持ブロック１の上に取り付けるためのボルト７を受け入れるために、ドリルで穴を開けられ、タップでネジ切りされる。金属補強部材３０の支持端部３２は、燃料噴射器保持ブロック１の内部導管４の上に載る。柱状部３１の端部は、ボルト７が締め付けられたときに、柱状部３１と支持端部３２に力が配分されるように面取りされる。このため、燃料噴射器保持ブロック１上における保護カバー２０の振動が制限される。   The fuel injector holding block 1 has a boss 5 for receiving the end of the columnar portion 31. The boss 5 is drilled and tapped to accept bolts 7 for mounting the protective cover 20 on the fuel injector holding block 1. The support end 32 of the metal reinforcing member 30 rests on the inner conduit 4 of the fuel injector holding block 1. The end of the columnar portion 31 is chamfered so that force is distributed to the columnar portion 31 and the support end portion 32 when the bolt 7 is tightened. For this reason, the vibration of the protective cover 20 on the fuel injector holding block 1 is limited.

保護カバー２０を燃料噴射器保持ブロック１の上に取り付けるために、ボス５の中に設けられたネジ穴に取り付けられるボルト７が使用される。あるいは、ネジ穴に取り付けられ、柱状部３１の上端から上に突出するスタッドボルトを用いてもよく、この場合、保護カバー２０は、スタッドボルトにネジ付けられるナットによって、燃料噴射器保持ブロック１の上に取り付けられる。   In order to mount the protective cover 20 on the fuel injector holding block 1, the bolt 7 attached to the screw hole provided in the boss 5 is used. Alternatively, a stud bolt that is attached to the screw hole and protrudes upward from the upper end of the columnar portion 31 may be used. In this case, the protective cover 20 is attached to the fuel injector holding block 1 by a nut screwed to the stud bolt. Mounted on top.

保護カバー２０は、噴射燃料用のコモンレール１１を衝撃に対して保護するように設けられる。特に、柱状部３１は、コモンレール１１の近傍にあり、衝撃に耐えるように寸法決めされる。   The protective cover 20 is provided so as to protect the common rail 11 for injected fuel against an impact. In particular, the columnar portion 31 is in the vicinity of the common rail 11 and is dimensioned to withstand impact.

本発明の１つの利点は、金属補強部材３０とプラスチック部４０のそれぞれに、別々の機能を割り当てることが可能であることである。従って、金属補強部材３０は、簡単な加工を実行することが可能な、約４ｍｍの極めて厚い板であり、金属補強部材３０の主な役割は、事故の際に生じる可能性がある前方からの衝撃に耐えることである。製造方法が許容する限りにおいては、例えばコイル用の給電モジュールのような他の部品を取り付けるためのプラスチック部４０を補強することに寄与することができる。   One advantage of the present invention is that separate functions can be assigned to each of the metal reinforcement member 30 and the plastic portion 40. Therefore, the metal reinforcing member 30 is a very thick plate of about 4 mm capable of performing simple processing, and the main role of the metal reinforcing member 30 is from the front that may occur in the event of an accident. It can withstand impacts. As far as the manufacturing method permits, it can contribute to reinforcing the plastic part 40 for attaching other parts such as a power supply module for coils.

プラスチック部４０は、金属補強部材３０に良好な外観をもたらし、外部環境に対して金属補強部材３０を保護する。さらに、プラスチック部４０は、金属補強部材３０の周囲に成型によって形成されるので、エンジンと車体との少なくとも一方のその他の構成要素を支持するためのインタフェースを有することができる。   The plastic part 40 provides a good appearance to the metal reinforcing member 30 and protects the metal reinforcing member 30 against the external environment. Furthermore, since the plastic part 40 is formed by molding around the metal reinforcing member 30, it can have an interface for supporting at least one other component of the engine and the vehicle body.

本発明は、上記に説明した実施の形態に限定されるものではなく、保護装置の全てをプラスチック成型品で作ることもできる。   The present invention is not limited to the embodiment described above, and all of the protective devices can be made of a plastic molded product.

Claims (7)

内燃エンジンに装着される、噴射燃料用のコモンレール（１１）の衝撃に対する保護装置（２０）であって、上記保護装置（２０）は上記内燃エンジンの構成要素（１）に装着され、上記保護装置（２０）は金属補強部材（３０）を含み、上記衝撃に耐えるように寸法決めされた上記金属補強部材（３０）の少なくとも２つの柱状部（３１）は、上記噴射燃料用の上記コモンレール（１１）の近傍に位置する、噴射燃料用のコモンレール（１１）の衝撃に対する保護装置（２０）において、上記保護装置（２０）は、他の構成要素の取り付け手段を有することを特徴とする、噴射燃料用のコモンレールの衝撃に対する保護装置。   A protection device (20) against an impact of a common rail (11) for injected fuel, which is mounted on an internal combustion engine, wherein the protection device (20) is mounted on a component (1) of the internal combustion engine, and the protection device (20) includes a metal reinforcing member (30), and at least two columnar portions (31) of the metal reinforcing member (30) dimensioned to withstand the impact are provided with the common rail (11) for the injected fuel. In the protective device (20) against the impact of the common rail (11) for the injected fuel, which is located in the vicinity of), the protective device (20) has means for attaching other components. Protective device against common rail impact. 上記他の構成要素の上記取り付け手段は、部分的にプラスチックから作られることを特徴とする、請求項１に記載の噴射燃料用のコモンレールの衝撃に対する保護装置。   The apparatus for protecting a common rail impact for injected fuel according to claim 1, characterized in that the attachment means of the other components are partly made of plastic. 上記他の構成要素の上記取り付け手段は、部分的に金属から作られることを特徴とする、請求項１または２に記載の噴射燃料用のコモンレールの衝撃に対する保護装置。   3. The apparatus for protecting a common rail impact for injected fuel according to claim 1 or 2, characterized in that the attachment means of the other component is partly made of metal. 上記金属補強部材（３０）は、金属板からなることを特徴とする、請求項１〜３のいずれか１つに記載の噴射燃料用のコモンレールの衝撃に対する保護装置。   The said metal reinforcement member (30) consists of a metal plate, The protection apparatus with respect to the impact of the common rail for injected fuels as described in any one of Claims 1-3 characterized by the above-mentioned. 上記他の構成要素の上記取り付け手段は、上記金属補強部材（３０）の上に成型によって形成されたプラスチックから部分的に作られることを特徴とする、請求項１〜４のいずれか１つに記載の噴射燃料用のコモンレールの衝撃に対する保護装置。   The attachment means for the other component is made in part from plastic formed by molding on the metal reinforcing member (30). The protective device against the impact of the common rail for the injected fuel as described. 上記他の構成要素の上記取り付け手段は、ケーブルを取り付けるための取り付け脚（４３）を含むことを特徴とする、請求項２〜５のいずれか１つに記載の噴射燃料用のコモンレールの衝撃に対する保護装置。   The said attachment means of the said other component contains the attachment leg (43) for attaching a cable with respect to the impact of the common rail for injected fuels as described in any one of Claims 2-5 characterized by the above-mentioned. Protective device. 上記他の構成要素は、コイル用の給電モジュールであることを特徴とする、請求項１〜６のいずれか１つに記載の噴射燃料用のコモンレールの衝撃に対する保護装置。   The said other component is the electric power feeding module for coils, The protection apparatus with respect to the impact of the common rail for injected fuels as described in any one of Claims 1-6 characterized by the above-mentioned.
JP2007531813A 2004-09-21 2005-09-20 Common rail metal protection device for injected fuel to avoid damage during impact Expired - Fee Related JP4812766B2 (en)

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FR0452101A FR2875555B1 (en) 2004-09-21 2004-09-21 METAL PROTECTOR OF THE GAS RAMP TO AVOID DAMAGE DURING SHOCK
PCT/FR2005/050769 WO2006032821A1 (en) 2004-09-21 2005-09-20 Metal protector for fuel manifold to avoid damage upon impact

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FR2875555A1 (en) 2006-03-24
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EP1794441A1 (en) 2007-06-13
BRPI0515504A (en) 2008-07-29

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