WO2021187015A1 - Gasoline direct-injection rail - Google Patents

Gasoline direct-injection rail Download PDF

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Publication number
WO2021187015A1
WO2021187015A1 PCT/JP2021/006555 JP2021006555W WO2021187015A1 WO 2021187015 A1 WO2021187015 A1 WO 2021187015A1 JP 2021006555 W JP2021006555 W JP 2021006555W WO 2021187015 A1 WO2021187015 A1 WO 2021187015A1
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WIPO (PCT)
Prior art keywords
fuel rail
main body
injector cup
injector
rail main
Prior art date
Application number
PCT/JP2021/006555
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French (fr)
Japanese (ja)
Inventor
洋行 西澤
Original Assignee
臼井国際産業株式会社
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 臼井国際産業株式会社 filed Critical 臼井国際産業株式会社
Priority to EP21770565.6A priority Critical patent/EP4102049A4/en
Priority to CN202180021326.0A priority patent/CN115280011A/en
Publication of WO2021187015A1 publication Critical patent/WO2021187015A1/en

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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
    • 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
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • 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
    • 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
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/857—Mounting of fuel injection apparatus characterised by mounting fuel or common rail to engine

Definitions

  • the present invention relates to a gasoline direct injection rail provided with a fuel rail main body and an injector cup adapter.
  • Patent Document 1 it has already been known that an injector is connected to the main body of a fuel rail for a high-pressure injection internal combustion engine via a connecting component such as a bag nut.
  • a connecting component such as a bag nut.
  • the conventional fuel rail body as described above is lengthened to correspond to the distance from the fuel rail body (not shown) to the combustion chamber (32) as shown in FIG.
  • a method is conceivable in which a pipe connecting the injector cup and the rail body is connected and integrally formed, and an injector generally used conventionally is connected and fixed to the injector cup.
  • Japanese Unexamined Patent Publication No. 2010-7651 Japanese Unexamined Patent Publication No. 2010-7651
  • the length corresponds to the distance from the fuel rail body (not shown) provided at the upper part of the engine (31) to the combustion chamber (32) provided at the lower part of the engine (31).
  • the present invention is intended to solve the above-mentioned problems, and the fuel rail main body can be formed by hot forging, and the layout is highly flexible, from the fuel rail main body to the combustion chamber. Even if the distance is long, it is intended to obtain a fuel rail with a simple configuration and low cost.
  • the present invention solves the above-mentioned problems, and includes a fuel rail main body and an injector cup adapter formed separately from the fuel rail main body.
  • the fuel rail main body is made of hot forging.
  • the injector cup adapter is made by cutting, and the injector cup adapter and the fuel rail main body are connected and fixed in a state where the connection portion is sealed by an O ring.
  • the injector cup adapter and the fuel rail main body may be connected and fixed to the cylinder block of the engine by screwing with the connection portion sealed by an O-ring.
  • the fuel rail body and the injector cup adapter By forming the fuel rail body and the injector cup adapter separately as described above, only the fuel rail body can be manufactured by hot forging, so that it is possible to cope with a high fuel pressure of the engine. Even if the distance between the fuel rail body and the combustion chamber is long, the distance between the fuel rail body and the combustion chamber can be increased by making the length of the injector cup adapter long corresponding to the distance. It becomes possible to arrange the injector corresponding to. Therefore, it can be easily manufactured without incurring a high cost.
  • the fuel rail body may be arranged on the upper part of the engine.
  • the distance between the fuel rail main body and the combustion chamber becomes long.
  • the injector cup adapter having a length corresponding to the distance to the fuel rail body as in the present invention, the injector can be arranged at an appropriate position facing the combustion chamber.
  • the manufacturing cost of the entire fuel injection system can be kept low.
  • the fuel rail main body may be fixedly arranged on the upper part of the cylinder block of the engine, and the injector cup adapter may be arranged within the insertion interval formed in the cylinder block.
  • the fuel rail main body and the injector cup adapter by forming the fuel rail main body and the injector cup adapter separately, only the fuel rail main body can be manufactured by hot forging, so that the fuel rail can withstand high fuel pressure of the engine. Can be obtained. Even when the distance between the fuel rail body and the combustion chamber is long, by making the length of the injector cup adapter correspond to the distance, even when an injector that has been generally used in the past is used. Since the injector can be placed in an appropriate position, it is not necessary to use a particularly long injector, so the manufacturing cost of the entire fuel injection system can be kept low, and the fuel rail body can be manufactured. Can be made easy.
  • the rail body and the injector cup adapter are formed separately, so the position of the rail body can be finely adjusted according to the assembly error that occurs in the solid engine. Therefore, it is possible to contribute to the improvement of the assembling property and the relaxation of the dimensional accuracy at the time of finishing the fuel rail.
  • FIG. 5 is a cross-sectional view showing Example 1 of the present invention.
  • FIG. 6 is a conceptual diagram of the first embodiment in a state of being assembled to a cylinder block. The perspective view which shows the conventional example.
  • Example 1 of the present invention will be described below with reference to FIGS. 1 and 2.
  • (1) is a hot forged fuel rail main body, and the fuel rail main body (1) is formed in a long tubular shape having a fuel passage (2) inside. There is.
  • the strength of the fuel rail body (1) can be increased, so that the fuel pressure of the engine (11) will be increased in the future. You can get possible products.
  • the adapter insertion part (3) is integrally projected in the direction perpendicular to the above fuel passage (2).
  • the adapter insertion portion (3) is provided with a connection recess (4) for connecting the injector cup adapter (6) as shown in FIG. Further, the connection recess (4) and the fuel passage (2) communicate with each other via a communication passage (5).
  • the injector cup adapter (6) made by cutting is connected to this connection recess (4). That is, a connecting convex portion (7) for connecting to the fuel rail main body (1) is provided at one end of the injector cup adapter (6), and a connecting concave portion (7) for connecting one end of the injector (12) is provided at the other end. 8) is provided. Then, the connecting convex portion (7) of the injector cup adapter (6) is connected to the connecting concave portion (4) of the adapter insertion portion (3) via an O-ring (15).
  • connection portion (16) between the injector cup adapter (6) and the fuel rail body (1) is connected and fixed in a state of being sealed by the O-ring (15). Therefore, it is possible to prevent liquid leakage or the like at the connection portion (16) between the injector cup adapter (6) and the fuel rail main body (1).
  • a distribution interval for distributing fuel from the fuel passage (2) of the fuel rail main body (1) is provided between the connection convex portion (7) and the connection concave portion (4).
  • a screw fixing part (10) provided with a screw hole (not shown) is connected and arranged on the opposite side of the adapter insertion part (3) from the fuel rail body (1). Then, the case where the fuel rail body (1) and the injector cup adapter (6) formed as described above are assembled to the upper portion (17) of the engine (11) will be described.
  • the engine (11) Between the pair of cylinder blocks (13) constituting the above, an insertion interval (14) is provided so that the injector cup adapter (6) and the injector (12) can be inserted and arranged.
  • the fuel rail main body (1) is arranged above the cylinder block (13), and the injector cup adapter (6) assembled to the fuel rail main body (1) is inserted at the above insertion interval (14). ), And the base end of the injector (12) is inserted and placed in the connecting recess (8). Then, a screw (not shown) is inserted into the screw fixing portion (10) integrally provided on the fuel rail main body (1), and the fuel rail main body (1) is screw-fixed to the cylinder block (13).
  • the injector cup adapter (6) is formed to be long in correspondence with such a long distance from the fuel rail main body (1) to the combustion chamber.
  • the injector (33) is connected to the injector (12) having a general length that has been widely used in the past, and the injector cup adapter (6) is connected to the long injector cup adapter (6). It is possible to place the injector (12) in an appropriate position so that it faces the surface. Therefore, since it is not necessary to use a long injector (12) specially, the manufacturing cost of the entire fuel injection system can be kept low. Further, by forming the injector cup adapter (6) to be long as described above, the injector (12) is arranged at an appropriate position corresponding to the long distance from the fuel rail body (1) to the combustion chamber. Therefore, the production can be facilitated.
  • the injector cup adapter (6) is formed separately from the fuel rail main body (1) and the injector cup adapter (6) is formed by cutting, the injector is formed from the fuel rail main body (1). It is possible to easily adjust the dimensions with and from the distance to (12). In addition, the length of the injector cup adapter (6) can be adjusted appropriately according to the position of other parts assembled to the engine (11), so it is possible to increase the degree of freedom in layout. Become.

Abstract

The present invention addresses the problem of providing a fuel rail which makes it possible to form a fuel rail main body by hot forging, which has a high degree of freedom in layout, and which keeps cost low with a simple configuration even when there is an increased distance from the fuel rail main body to a combustion chamber. In order to solve the above problem, the present invention is provided with a fuel rail main body (1) and an injector cup adaptor (6) which is formed separately from the fuel rail main body (1), wherein the fuel rail main body (1) is produced by hot forging, the injector cup adaptor (6) is produced by cutting, and the injector cup adaptor (6) and the fuel rail main body (1) are coupled and fixed with a joint (16) sealed by an O ring (15).

Description

ガソリン直噴レールGasoline direct injection rail
　本発明は、燃料レール本体とインジェクターカップアダプターとを備えたガソリン直噴レールに関するものである。 The present invention relates to a gasoline direct injection rail provided with a fuel rail main body and an injector cup adapter.
　従来より、特許文献１に示す如く、高圧噴射内燃機関用の燃料レールの本体に、袋ナット等の接続部品を介してインジェクターを接続したものが既に公知となっている。しかしながらレイアウト等の関係により、上記の如き燃料レール本体をエンジンの上部に設置した場合などは、カムシャフトやバルブなどの周辺部品の存在により、当該燃料レール本体から燃焼室までの距離が長くなる。そのため、上記の如き従来より一般的に使用されているインジェクターを使用した場合には、燃焼室までの長い距離に対応するためには制限を受けることから、問題となっていた。 Conventionally, as shown in Patent Document 1, it has already been known that an injector is connected to the main body of a fuel rail for a high-pressure injection internal combustion engine via a connecting component such as a bag nut. However, due to layout and other factors, when the fuel rail body is installed above the engine as described above, the distance from the fuel rail body to the combustion chamber becomes long due to the presence of peripheral parts such as camshafts and valves. Therefore, when an injector generally used in the past as described above is used, there is a problem in order to cope with a long distance to the combustion chamber.
　そこでこのような問題を解決するためには、上記の如き従来の燃料レール本体に、図３に示す如く当該燃料レール本体(図示せず)から燃焼室(32)までの距離に対応させて長尺に形成した特別なインジェクター(33)を接続する方法、あるいは従来インジェクターカップを使用する場合として、燃料レール本体に長尺なインジェクターカップを一体的に形成する方法、または長尺なインジェクターカップの代わりにインジェクターカップとレール本体とをつなぐパイプを接続して一体的に形成し、当該インジェクターカップに、従来より一般的に使用されているインジェクターを接続固定する方法が考えられる。
特開2010-7651号公報 Therefore, in order to solve such a problem, the conventional fuel rail body as described above is lengthened to correspond to the distance from the fuel rail body (not shown) to the combustion chamber (32) as shown in FIG. A method of connecting a special injector (33) formed in a long length, or a method of integrally forming a long injector cup with the fuel rail body when using a conventional injector cup, or an alternative to the long injector cup. A method is conceivable in which a pipe connecting the injector cup and the rail body is connected and integrally formed, and an injector generally used conventionally is connected and fixed to the injector cup.
Japanese Unexamined Patent Publication No. 2010-7651
　しかしながら、図３に示す如くエンジン(31)の上部に設けられた燃料レール本体(図示せず)から当該エンジン(31)の下部に設けられた燃焼室(32)までの距離に対応させて長尺に形成したインジェクター(33)を接続する場合には、長尺なインジェクター(33)を特別に製作する必要があることから、コストが高くつくものとなっていた。 However, as shown in FIG. 3, the length corresponds to the distance from the fuel rail body (not shown) provided at the upper part of the engine (31) to the combustion chamber (32) provided at the lower part of the engine (31). When connecting an injector (33) formed on a scale, it is necessary to specially manufacture a long injector (33), which is costly.
　また、燃料レール本体に長尺なインジェクターカップを一体形成する場合には、燃料レール全体がかさ高いものとなる。よって、レイアウトの自由度が低くなるとともに製品全体がかさ高いものとなるため、取り扱いが煩雑なものとなっていた。 Also, when a long injector cup is integrally formed with the fuel rail body, the entire fuel rail becomes bulky. Therefore, the degree of freedom in layout is reduced and the entire product is bulky, which makes handling complicated.
　更に、今後ガソリン直噴エンジンは高燃圧化が予想されるが、素管に各部品を炉中ろう付けなどにより固定配置して形成した燃料レールでは強度不足を引き起こす懸念がある。そのため、当該燃料レールを熱間鍛造にて形成することが求められるが、上記のように長尺なインジェクターカップを設けた燃料レールを熱間鍛造にて形成することは困難である。 Furthermore, although gasoline direct injection engines are expected to have higher fuel pressure in the future, there is a concern that fuel rails formed by fixing each part to the raw pipe by brazing in the furnace will cause insufficient strength. Therefore, it is required to form the fuel rail by hot forging, but it is difficult to form the fuel rail provided with the long injector cup by hot forging as described above.
　そこで、本発明は上記の如き課題を解決しようとするものであって、燃料レール本体を熱間鍛造にて形成することができるとともに、レイアウトの自由度が高く、燃料レール本体から燃焼室までの距離が長くなった場合でも簡易な構成でコストを低く抑えた燃料レールを得ようとするものである。 Therefore, the present invention is intended to solve the above-mentioned problems, and the fuel rail main body can be formed by hot forging, and the layout is highly flexible, from the fuel rail main body to the combustion chamber. Even if the distance is long, it is intended to obtain a fuel rail with a simple configuration and low cost.
　本願発明は上述の如き課題を解決したものであって、燃料レール本体と、この燃料レール本体とは別体に形成したインジェクターカップアダプターとを備えたものにおいて、上記燃料レール本体は熱間鍛造製であるとともに、上記インジェクターカップアダプターは切削加工製であって、当該インジェクターカップアダプターと上記燃料レール本体とは、Oリングにて接続部を密閉した状態で接続固定されて成るものである。 The present invention solves the above-mentioned problems, and includes a fuel rail main body and an injector cup adapter formed separately from the fuel rail main body. The fuel rail main body is made of hot forging. In addition, the injector cup adapter is made by cutting, and the injector cup adapter and the fuel rail main body are connected and fixed in a state where the connection portion is sealed by an O ring.
　尚、当該インジェクターカップアダプターと上記燃料レール本体とは、Oリングにて接続部を密閉した状態で、エンジンのシリンダーブロックに、螺合締結により接続固定されたものであってもよい。 The injector cup adapter and the fuel rail main body may be connected and fixed to the cylinder block of the engine by screwing with the connection portion sealed by an O-ring.
　上記の如く燃料レール本体とインジェクターカップアダプターとを別体に形成することにより、燃料レール本体のみを熱間鍛造により製造することができるため、エンジンの高燃圧化に対応することが可能となる。また燃料レール本体と燃焼室との間の距離が長い場合でも、インジェクターカップアダプターの長さを当該距離に対応させて長尺なものとすることにより、燃料レール本体と燃焼室との間の距離に対応させてインジェクターを配置することが可能となる。そのため、高いコストをかけることなく容易に製造することができる。 By forming the fuel rail body and the injector cup adapter separately as described above, only the fuel rail body can be manufactured by hot forging, so that it is possible to cope with a high fuel pressure of the engine. Even if the distance between the fuel rail body and the combustion chamber is long, the distance between the fuel rail body and the combustion chamber can be increased by making the length of the injector cup adapter long corresponding to the distance. It becomes possible to arrange the injector corresponding to. Therefore, it can be easily manufactured without incurring a high cost.
　また上記燃料レール本体は、エンジンの上部に配置されたものであっても良い。このようにエンジンの上部に燃料レール本体が配置された場合には、当該燃料レール本体と燃焼室との間の距離が長いものとなる。しかし、本発明の如く当該距離に対応した長さのインジェクターカップアダプターを燃料レール本体に接続することにより、インジェクターを燃焼室に臨ませた適切な位置に配置することが可能となる。また、長尺なインジェクターを特別に製造する必要がないため、燃料噴射システム全体の製造コストを低く抑えることができる。 Further, the fuel rail body may be arranged on the upper part of the engine. When the fuel rail main body is arranged on the upper part of the engine in this way, the distance between the fuel rail main body and the combustion chamber becomes long. However, by connecting the injector cup adapter having a length corresponding to the distance to the fuel rail body as in the present invention, the injector can be arranged at an appropriate position facing the combustion chamber. Moreover, since it is not necessary to specially manufacture a long injector, the manufacturing cost of the entire fuel injection system can be kept low.
　また上記燃料レール本体は、上記エンジンのシリンダーブロックの上部に固定配置されるとともに、上記インジェクターカップアダプターは、上記シリンダーブロックに形成された挿通間隔内に配置されたものであってもよい。 Further, the fuel rail main body may be fixedly arranged on the upper part of the cylinder block of the engine, and the injector cup adapter may be arranged within the insertion interval formed in the cylinder block.
　本願発明は上記の如く、燃料レール本体とインジェクターカップアダプターとを別体に形成することにより、燃料レール本体のみを熱間鍛造により製造することができるため、エンジンの高燃圧化に耐え得る燃料レールを得ることが可能となる。また燃料レール本体と燃焼室との間の距離が長い場合でも、インジェクターカップアダプターの長さを当該距離に対応させることにより、従来より一般的に使用されているインジェクターを用いた場合であっても、当該インジェクターを適切な位置に配置することが可能となるため、特別に長尺なインジェクターを使用する必要がないため燃料噴射システム全体の製造コストを低く抑えることができるとともに、燃料レール本体の製造を容易なものとすることができる。 In the present invention, as described above, by forming the fuel rail main body and the injector cup adapter separately, only the fuel rail main body can be manufactured by hot forging, so that the fuel rail can withstand high fuel pressure of the engine. Can be obtained. Even when the distance between the fuel rail body and the combustion chamber is long, by making the length of the injector cup adapter correspond to the distance, even when an injector that has been generally used in the past is used. Since the injector can be placed in an appropriate position, it is not necessary to use a particularly long injector, so the manufacturing cost of the entire fuel injection system can be kept low, and the fuel rail body can be manufactured. Can be made easy.
　更にエンジンへの組付け時には、レール本体とインジェクターカップアダプターとが別体に形成されているため、エンジン固体で発生する組付け誤差に合わせてレール本体の位置を微調整することが可能となる。従って、組付け性の向上、及び燃料レールの仕上げ時の寸法精度緩和に寄与することができる。 Furthermore, when assembling to the engine, the rail body and the injector cup adapter are formed separately, so the position of the rail body can be finely adjusted according to the assembly error that occurs in the solid engine. Therefore, it is possible to contribute to the improvement of the assembling property and the relaxation of the dimensional accuracy at the time of finishing the fuel rail.
本発明の実施例１を示す断面図。FIG. 5 is a cross-sectional view showing Example 1 of the present invention. シリンダーブロックに組付けた状態の実施例１の概念図。FIG. 6 is a conceptual diagram of the first embodiment in a state of being assembled to a cylinder block. 従来例を示す斜視図。The perspective view which shows the conventional example.
　本発明の実施例１について、図１、２において以下に説明する。まず、図１に示す如く(1)は熱間鍛造製の燃料レール本体であって、この燃料レール本体(1)は、内部に燃料通路(2)を設けた長尺な管状に形成されている。このように燃料レール本体(1)を熱間鍛造により形成することにより、当該燃料レール本体(1)の強度を高いものとすることができるため、今後のエンジン(11)の高燃圧化に対応可能な製品を得ることができる。 Example 1 of the present invention will be described below with reference to FIGS. 1 and 2. First, as shown in FIG. 1, (1) is a hot forged fuel rail main body, and the fuel rail main body (1) is formed in a long tubular shape having a fuel passage (2) inside. There is. By forming the fuel rail body (1) by hot forging in this way, the strength of the fuel rail body (1) can be increased, so that the fuel pressure of the engine (11) will be increased in the future. You can get possible products.
　そしてこの燃料レール本体(1)には、上記燃料通路(2)とは垂直方向にアダプター挿入部(3)を一体的に突設している。そしてこのアダプター挿入部(3)には、図１に示す如くインジェクターカップアダプター(6)を接続するための接続凹部(4)を設けている。またこの接続凹部(4)と上記燃料通路(2)との間は、連通路(5)を介して連通している。 And, in this fuel rail body (1), the adapter insertion part (3) is integrally projected in the direction perpendicular to the above fuel passage (2). The adapter insertion portion (3) is provided with a connection recess (4) for connecting the injector cup adapter (6) as shown in FIG. Further, the connection recess (4) and the fuel passage (2) communicate with each other via a communication passage (5).
　そしてこの接続凹部(4)には、切削加工製のインジェクターカップアダプター(6)を接続している。即ち、インジェクターカップアダプター(6)の一端に燃料レール本体(1)と接続するための接続凸部(7)を設けるとともに、他端にはインジェクター(12)の一端を連結するための連結凹部(8)を設けている。そしてこのインジェクターカップアダプター(6)の接続凸部(7)をアダプター挿入部(3)の接続凹部(4)内に、Oリング(15)を介して接続している。 And the injector cup adapter (6) made by cutting is connected to this connection recess (4). That is, a connecting convex portion (7) for connecting to the fuel rail main body (1) is provided at one end of the injector cup adapter (6), and a connecting concave portion (7) for connecting one end of the injector (12) is provided at the other end. 8) is provided. Then, the connecting convex portion (7) of the injector cup adapter (6) is connected to the connecting concave portion (4) of the adapter insertion portion (3) via an O-ring (15).
　これにより、上記インジェクターカップアダプター(6)と上記燃料レール本体(1)との接続部(16)が、当該Oリング(15)にて密閉された状態で接続固定されるものとなる。よって、上記インジェクターカップアダプター(6)と燃料レール本体(1)との接続部(16)における液漏れ等を防ぐことができる。尚、この接続凸部(7)と接続凹部(4)との間には、燃料レール本体(1)の燃料通路(2)からの燃料を流通させるための流通間隔を設けている。 As a result, the connection portion (16) between the injector cup adapter (6) and the fuel rail body (1) is connected and fixed in a state of being sealed by the O-ring (15). Therefore, it is possible to prevent liquid leakage or the like at the connection portion (16) between the injector cup adapter (6) and the fuel rail main body (1). A distribution interval for distributing fuel from the fuel passage (2) of the fuel rail main body (1) is provided between the connection convex portion (7) and the connection concave portion (4).
　また上記アダプター挿入部(3)の燃料レール本体(1)とは反対側には、ネジ穴（図示せず。）を設けたネジ固定部(10)を接続配置している。そして上記の如く形成した燃料レール本体(1)及びインジェクターカップアダプター(6)をエンジン(11)の上部(17)に組み付ける場合について説明すると、本実施例では図２に示す如く、エンジン(11)を構成する一対のシリンダーブロック(13)の間には、インジェクターカップアダプター(6)とインジェクター(12)とを挿通配置可能な挿通間隔(14)が設けられている。 Also, on the opposite side of the adapter insertion part (3) from the fuel rail body (1), a screw fixing part (10) provided with a screw hole (not shown) is connected and arranged. Then, the case where the fuel rail body (1) and the injector cup adapter (6) formed as described above are assembled to the upper portion (17) of the engine (11) will be described. In this embodiment, as shown in FIG. 2, the engine (11) Between the pair of cylinder blocks (13) constituting the above, an insertion interval (14) is provided so that the injector cup adapter (6) and the injector (12) can be inserted and arranged.
　そして図２に示す如く、このシリンダーブロック(13)の上方に燃料レール本体(1)を配置するとともに、この燃料レール本体(1)に組付けたインジェクターカップアダプター(6)を上記挿通間隔(14)内に挿通するとともに、インジェクター(12)の基端を連結凹部(8)内に挿入配置する。そして、この燃料レール本体(1)に一体に設けたネジ固定部(10)にネジ（図示せず。）を挿通し、上記シリンダーブロック(13)に燃料レール本体(1)をネジ固定する。 Then, as shown in FIG. 2, the fuel rail main body (1) is arranged above the cylinder block (13), and the injector cup adapter (6) assembled to the fuel rail main body (1) is inserted at the above insertion interval (14). ), And the base end of the injector (12) is inserted and placed in the connecting recess (8). Then, a screw (not shown) is inserted into the screw fixing portion (10) integrally provided on the fuel rail main body (1), and the fuel rail main body (1) is screw-fixed to the cylinder block (13).
　ここで、本実施例は上記の如く、エンジン(11)の上部(17)に燃料レール本体(1)を設けているため、燃料レール本体(1)と燃焼室との間の距離が長いものとなる。そのため、このような上記燃料レール本体(1)から燃焼室との長尺な距離に対応させて、インジェクターカップアダプター(6)を長尺に形成している。 Here, in this embodiment, as described above, since the fuel rail main body (1) is provided on the upper portion (17) of the engine (11), the distance between the fuel rail main body (1) and the combustion chamber is long. It becomes. Therefore, the injector cup adapter (6) is formed to be long in correspondence with such a long distance from the fuel rail main body (1) to the combustion chamber.
　これにより、図３に示す如くインジェクター(33)を、従来より広く使用されている一般的な長さのインジェクター(12)を上記長尺なインジェクターカップアダプター(6)に接続することによって、燃焼室に臨ませてインジェクター(12)を適正な位置に配置することが可能となる。そのため、長尺なインジェクター(12)を特別に使用する必要がないことから、燃料噴射システム全体の製造コストを低く抑えることができる。また上記の如くインジェクターカップアダプター(6)を長尺に形成することにより、上記燃料レール本体(1)から燃焼室との長尺な距離に対応させてインジェクター(12)を適切な位置に配置することができるため、製造を容易なものとすることができる。 As a result, as shown in FIG. 3, the injector (33) is connected to the injector (12) having a general length that has been widely used in the past, and the injector cup adapter (6) is connected to the long injector cup adapter (6). It is possible to place the injector (12) in an appropriate position so that it faces the surface. Therefore, since it is not necessary to use a long injector (12) specially, the manufacturing cost of the entire fuel injection system can be kept low. Further, by forming the injector cup adapter (6) to be long as described above, the injector (12) is arranged at an appropriate position corresponding to the long distance from the fuel rail body (1) to the combustion chamber. Therefore, the production can be facilitated.
　またインジェクターカップアダプター(6)を燃料レール本体(1)とは別体に形成するとともに、当該インジェクターカップアダプター(6)を切削加工にて形成するものであるから、燃料レール本体(1)からインジェクター(12)までの距離との間の寸法調整を容易に行うことが可能となる。また、エンジン(11)に組付けられている他の部品の位置に対応させて、インジェクターカップアダプター(6)の長さを適宜調整することができるため、レイアウトの自由度を高めることが可能となる。 Further, since the injector cup adapter (6) is formed separately from the fuel rail main body (1) and the injector cup adapter (6) is formed by cutting, the injector is formed from the fuel rail main body (1). It is possible to easily adjust the dimensions with and from the distance to (12). In addition, the length of the injector cup adapter (6) can be adjusted appropriately according to the position of other parts assembled to the engine (11), so it is possible to increase the degree of freedom in layout. Become.
　１　燃料レール本体
　６　インジェクターカップアダプター
１１　エンジン
１３　シリンダーブロック
１４　挿通間隔
１５　Oリング
１６　接続部
１７　上部 1 Fuel rail body 6 Injector cup adapter 11 Engine 13 Cylinder block 14 Insertion interval 15 O-ring 16 Connection 17 Upper part

Claims (3)

  1. 　燃料レール本体と、この燃料レール本体とは別体に形成したインジェクターカップアダプターとを備えたものにおいて、上記燃料レール本体は熱間鍛造製であるとともに、上記インジェクターカップアダプターは切削加工製であって、当該インジェクターカップアダプターと上記燃料レール本体とは、Oリングにて接続部を密閉した状態で接続固定されたことを特徴とするガソリン直噴燃料レール。 In the one provided with the fuel rail main body and the injector cup adapter formed separately from the fuel rail main body, the fuel rail main body is made of hot forging and the injector cup adapter is made of cutting. A gasoline direct injection fuel rail characterized in that the injector cup adapter and the above fuel rail body are connected and fixed in a state where the connection portion is sealed with an O ring.
  2. 　上記燃料レール本体は、エンジンの上部に配置されたことを特徴とする請求項１のガソリン直噴燃料レール。 The gasoline direct injection fuel rail according to claim 1, wherein the fuel rail body is arranged above the engine.
  3. 　上記燃料レール本体は、上記エンジンのシリンダーブロックの上部に固定配置されるとともに、上記インジェクターカップアダプターは、上記シリンダーブロックに形成された挿通間隔内に配置されたことを特徴とする請求項２のガソリン直噴レール。 The gasoline according to claim 2, wherein the fuel rail main body is fixedly arranged on the upper part of the cylinder block of the engine, and the injector cup adapter is arranged within the insertion interval formed in the cylinder block. Direct injection rail.
PCT/JP2021/006555 2020-03-18 2021-02-22 Gasoline direct-injection rail WO2021187015A1 (en)

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EP21770565.6A EP4102049A4 (en) 2020-03-18 2021-02-22 Gasoline direct-injection rail
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JP2020047812A JP2021148047A (en) 2020-03-18 2020-03-18 Gasoline direct injection rail
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JP2000249024A (en) * 1999-02-26 2000-09-12 Keihin Corp Attaching structure of fuel injection valve for engine
JP2001355540A (en) * 2000-04-26 2001-12-26 Ford Global Technol Inc Fuel injection system for internal combustion engine
JP2002070691A (en) * 2000-08-31 2002-03-08 Otics Corp Delivery pipe
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Title
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EP4102049A4 (en) 2024-02-28
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EP4102049A1 (en) 2022-12-14

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