WO2009119234A1 - Mounting structure for fuel injection device - Google Patents

Mounting structure for fuel injection device Download PDF

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Publication number
WO2009119234A1
WO2009119234A1 PCT/JP2009/053419 JP2009053419W WO2009119234A1 WO 2009119234 A1 WO2009119234 A1 WO 2009119234A1 JP 2009053419 W JP2009053419 W JP 2009053419W WO 2009119234 A1 WO2009119234 A1 WO 2009119234A1
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WO
WIPO (PCT)
Prior art keywords
fuel injection
bolt
injection device
intake passage
mounting structure
Prior art date
Application number
PCT/JP2009/053419
Other languages
French (fr)
Japanese (ja)
Inventor
健一郎 池田
正雄 石田
Original Assignee
本田技研工業株式会社
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 本田技研工業株式会社 filed Critical 本田技研工業株式会社
Priority to CN2009801108627A priority Critical patent/CN101981304B/en
Priority to BRPI0910114-4A priority patent/BRPI0910114B1/en
Publication of WO2009119234A1 publication Critical patent/WO2009119234A1/en

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Classifications

    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/04—Fuel-injectors combined or associated with other devices the devices being combustion-air intake or exhaust valves
    • 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
    • F02M61/145—Arrangements of injectors with respect to engines; Mounting of injectors the injection nozzle opening into the air intake conduit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits

Definitions

  • a fuel injection that is inserted into the mounting hole so that an intake passage forming body that forms the intake passage is provided with a mounting hole that is continuous with the intake passage, and an annular seal member is sandwiched between the mounting passage and the intake passage forming body.
  • a fuel injection device including a valve is provided with a mounted portion that is fastened by a single bolt to a mounting portion that is provided in the intake passage forming body, and the intake passage is configured to prevent co-rotation during fastening by the bolt.
  • the present invention relates to a mounting structure of a fuel injection device provided with an engaging portion that engages with a forming body.
  • a front end portion of the fuel injection valve is fitted to the intake pipe that forms the intake passage via a seal member, and a holder that clamps the fuel injection valve between the intake pipe and the intake pipe is fastened to the intake pipe by one bolt.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a fuel injection device mounting structure in which no torque is applied to the bolt even when an external force is applied to the fuel injection device side.
  • the intake passage forming body forming the intake passage is provided with a mounting hole connected to the intake passage, and an annular seal member is sandwiched between the intake passage forming body and the intake passage forming body.
  • a fuel injection device including a fuel injection valve that is inserted into a mounting hole is provided with a mounted portion that is fastened with a single bolt to a mounting portion that is provided in the intake passage forming body, and at the time of fastening with the bolt.
  • the fuel injection device includes a rear portion of the fuel injection valve so that the fuel injection valve is sandwiched between the fuel injection valve and the intake passage forming body. And a joint cap to which a fuel pipe is connected, and the attached portion and the engaging portion are provided on the joint cap.
  • the present invention abuts and engages with one end of the axial force receiving member that penetrates the mounting portion and the mounted portion, and the mounting portion and the mounted portion.
  • a bolt having an enlarged diameter head at one end that can be brought into contact with and engaged with one of the axial force receiving members is inserted into the axial force receiving member, and is in contact with and engaged with the other end of the axial force receiving member.
  • a third feature is that a nut that can abut and engage with the other of the mounted parts is screwed into the other end of the bolt.
  • the axial force receiving member is inserted into one of the attachment portion and the attachment portion so as to be rotatable around an axis.
  • a fourth feature is that the fitting portion is press-fitted into the other of the attachment portion and the attachment portion.
  • the nut capable of contacting and engaging with the attachment portion is disposed close to the outer surface of the intake passage forming body so as to prevent detachment from the bolt.
  • a fifth feature is that a removal prevention wall that is close to and faces the enlarged diameter head portion of the bolt from the outside in the axial direction is provided in another part around the intake passage forming body.
  • the present invention avoids a fastening portion between the intake passage forming body that is an intake pipe and a throttle body connected to the intake passage forming body.
  • An eighth feature is that the intake passage forming body is provided with the attachment portion.
  • the present invention provides the mounting portion and the mounting portion on at least one of the facing surfaces of the mounting portion and the mounting portion made of synthetic resin, in addition to the features described in any one of the first to eighth aspects.
  • a ninth feature is that a projecting portion that elastically contacts the other of the opposing surfaces is integrally projected.
  • a bolt having an enlarged diameter head at one end that is in contact with and engages with one end of an axial force receiving member that penetrates the attachment portion and the attached portion is inserted into the axial force reception member.
  • the axial force receiving member is rotatably inserted into one of the attachment portion and the attachment portion and is press-fitted into the other of the attachment portion and the attachment portion.
  • An axial force receiving member can be assembled to the other of the parts to make a small assembly, and the assembly process can be simplified.
  • a nut screwed to the bolt is disposed in proximity to the outer surface of the intake passage forming body so as to prevent detachment from the bolt. Since the wall for preventing slipping facing from the outside in the axial direction is provided in another part different from the intake passage forming body, it is possible to reliably prevent the bolt from coming off and the nut from falling off.
  • the bolt inserted into the axial force receiving member rotatably inserted into one of the attachment portion and the attachment portion is insert-coupled to the other of the attachment portion and the attachment portion. Since it is screwed into the nut, it is not necessary to hold the bolt with a tool so that the nut does not turn when screwing the bolt into the nut, and the assembly process can be simplified.
  • the wall for preventing slipping that faces the enlarged head portion of the bolt from the outside in the axial direction is provided in other parts other than the intake passage forming body, it is possible to reliably prevent the bolt from coming off. can do.
  • the attachment portion is provided on the intake passage forming body while avoiding the fastening portion of the intake passage forming body and the throttle body which are the intake pipes, so that the connection state of the intake pipe and the throttle body is released. Therefore, maintenance of the fuel injection device can be performed without increasing the maintainability of the fuel injection device.
  • the protrusion protruding from at least one of the facing surfaces of the mounting portion and the mounted portion made of synthetic resin is elastic on the other of the facing surfaces of the mounting portion and the mounted portion. Since the contact occurs, vibrations can be suppressed by preventing rattling between the attachment portion and the attachment portion.
  • FIG. 1 is a side view of the motorcycle according to the first embodiment.
  • FIG. 2 is a side view of a part of the vehicle body frame and the internal combustion engine.
  • FIG. 3 is an enlarged cross-sectional view of a main part of the engine body and the intake system.
  • First embodiment) 4 is an enlarged sectional view taken along line 4-4 of FIG.
  • First embodiment) 5 is a cross-sectional view taken along line 5-5 of FIG.
  • FIG. 6 is an enlarged view of a main part of FIG.
  • FIG. 7 is a perspective view of the intake pipe and the fuel injection device.
  • FIG. 8 is a perspective view of the intake pipe and the fuel injection device as viewed from a direction different from that in FIG.
  • FIG. 9 is a view taken along arrow 9 in FIG.
  • First embodiment 10 is an enlarged cross-sectional view taken along line 10-10 of FIG.
  • First embodiment 11 is a cross-sectional view taken along line 11-11 in FIG.
  • FIG. 12 is a sectional view corresponding to FIG. 10 of the second embodiment.
  • FIG. 13 is a sectional view corresponding to FIG. 9 of the third embodiment.
  • FIG. 14 is a sectional view corresponding to FIG. 9 of the fourth embodiment.
  • FIG. 15 is a sectional view corresponding to FIG. 9 of the fifth embodiment.
  • Intake passage 46 ... Intake pipe 63 as an intake passage forming body ... Mounting hole 64 ... Seal member 65 ; Fuel injection valve 66 ... Joint cap 67 ... Fuel injection device 68 ... Fuel hose 71 which is a fuel pipe ... Attachment portion 72 ... Mounted portion 73 ... Engagement portion 74 ... Bolt 74a ... Expanded diameter head 77, 81, 82. ⁇ Collars 78, 83 ... nuts 79 ... removal prevention walls 84 ... projections that are axial force receiving members
  • 1 to 11 show a first embodiment of the present invention.
  • a front end portion of a swing arm 17 is supported on the pivot plate 16 via a support shaft 18 so as to be swingable up and down.
  • a rear wheel WR is supported on the rear portion of the swing arm 17, and the swing arm 17 and the seat rail 15 are supported.
  • a rear cushion 19 is telescopically provided between them.
  • a fuel tank 20 disposed above the rear wheel WR and a storage box 21 disposed in front of the fuel tank 20 are supported by the seat rails 15. Is covered by the seat rails 15.
  • the engine body 23 of the internal combustion engine E that is four cycles is suspended from the upper and lower portions of the engine hanger 90 and the pivot plate 16 fixed to the middle portion of the main frame 14.
  • the engine body 23 rotatably supports a crankshaft 29 extending in the width direction of the vehicle body frame F, and cranks a crankcase 24 incorporating a transmission (not shown) and a cylinder axis C by tilting forward until it is substantially horizontal.
  • a cylinder block 25 coupled to the case 24 and a cylinder head 26 coupled to the cylinder block 25 are provided.
  • An output shaft 27 that outputs power from the transmission protrudes from the crankcase 24 in front of the support shaft 18, and the power from the output shaft 27 is transmitted to the rear wheel WR via the chain transmission means 28. Is transmitted to.
  • a starter motor 92 is mounted in front of the engine hanger 90 and above the crankcase 24.
  • a piston 31 is slidably fitted into a cylinder bore 30 formed in the cylinder block 25, and the piston 31 is connected to the crankshaft 29 via a connecting rod 91.
  • a combustion chamber 32 is formed between the cylinder block 25 and the cylinder head 26 with the top of the piston 31 facing.
  • the cylinder head 26 is provided with an intake port 33 that opens to the upper side wall and an exhaust port 34 that opens to the lower side wall, and an intake valve 35 that switches communication and blocking of the intake port 33 to the combustion chamber 32.
  • an exhaust valve 36 for switching between communication and blocking of the exhaust port 34 to the combustion chamber 32 is disposed in the cylinder head 26 so as to be openable and closable.
  • the valve gear 37 that opens and closes the intake valve 35 and the exhaust valve 36 swings in accordance with the rotation of the camshaft 38 and the single camshaft 38 that is common to the intake valve 35 and the exhaust valve 36.
  • Intake side and exhaust side rocker arms 39 and 40 for opening and closing the intake valve 35 and the exhaust valve 36, respectively, are provided in the cylinder head 26.
  • An exhaust system 41 communicating with the exhaust port 34 is connected to the lower side wall of the cylinder head 26, and the exhaust system 41 has an upstream end connected to the lower side wall of the cylinder head 26 and an engine body 23. And an exhaust pipe 42 extending rearward and an exhaust muffler 43 (see FIG. 1) disposed on the right side of the rear wheel WR and connected to the downstream end of the exhaust pipe 42.
  • An intake system 44 communicating with the intake port 33 is connected to the upper side wall of the cylinder head 26, and the intake system 44 has an intake passage 45 for guiding intake air to the intake port 33.
  • An intake pipe 46 as an intake passage forming body formed in a cylindrical shape with a synthetic resin such as polyphenylene sulfide and having a downstream end attached to the cylinder head 26; a throttle body 47 connected to the upstream end of the intake pipe 46;
  • An air cleaner 48 supported by the front part of the main frame 14 in the vehicle body frame F and connected to the upstream end of the throttle body 47 is provided.
  • the throttle body 47 and the air cleaner 48 are connected via a rubber connecting pipe 49. .
  • the intake pipe 46 is formed by bending so as to swell rearward from the upper side wall of the cylinder head 26, and is connected to a throttle body 47 disposed above the cylinder head 26.
  • the throttle body 47 has an intake passage 50 that communicates with the intake passage 45 of the intake pipe 46, and a throttle valve 51 that adjusts the opening of the intake passage 50 is rotatably supported by the throttle body 47. .
  • the downstream end of the intake pipe 46 is attached to the coupling surface 52 of the cylinder head 26 with an endless seal member 53 interposed between the flat coupling surface 52 formed on the upper side surface of the cylinder head 26.
  • a flange portion 54 that is integrally provided at the downstream end of the intake pipe 46 so as to protrude outward is fastened to the coupling surface 52.
  • the upstream end of the intake pipe 46 is an endless seal member 56 between a flat coupling surface 55 formed on the end face of the throttle body 47 on the intake pipe 46 side.
  • a flange portion 57 that projects outward is integrally provided at the upstream end of the intake pipe 46, and an end portion of the throttle body 47 on the intake pipe 46 side.
  • the flange portion 58 that projects outwardly corresponding to the flange portion 57 is integrally provided so as to form a part of the coupling surface 55, and the flange portions 57, 58 are fastened by bolts 59, 59. Is done.
  • the throttle body 47 has an upstream end opened to the intake passage 50 of the throttle body 51 on the upstream side of the throttle valve 51 pivotally supported by the throttle body 47 and on the downstream side of the throttle valve 51.
  • a slow system passage 61 that passes through the downstream end of the intake passage 50 is provided so as to bypass the throttle valve 51, and the downstream end 61 a of the slow system passage 61 faces the coupling surface 55 of the throttle body 47.
  • An opening is formed in the coupling surface 55 of the throttle body 47 inward of a seal groove 60 formed on the end surface of the intake pipe 46 to which the seal member 56 is mounted.
  • downstream end 61a of the slow passage 61 is a groove bent in a crank shape in order to prevent as much as possible the entry of carbon or the like into the slow passage 61 from the minute gap generated between the intake pipe 46 and the throttle body 47. It is formed in a shape.
  • the intake pipe 46 is integrally provided with a mounting pipe portion 62 having an axis directed to the intake port 33, and the mounting pipe portion 62 has a mounting hole 63 connected to the intake passage 45.
  • the tip of the fuel injection valve 65 is inserted into the mounting hole 63 so as to sandwich the annular seal member 64 between the intake pipe 46 and the intake pipe 46.
  • An annular stepped portion 63 a facing outward is formed in the middle portion of the mounting hole 63, and the outer periphery of the fuel injection valve 65 is in close contact with the outer periphery of the fuel injection valve 65 and the mounting hole 63.
  • An annular step portion 65a is formed that sandwiches the seal member 64, whose outer periphery is in close contact with the inner surface, between the step portion 63a.
  • a fuel injection device 67 is constituted by the fuel injection valve 65 and a joint cap 66 made of a synthetic resin, for example, polyamide, for fitting the rear portion of the fuel injection valve 65 in a liquid-tight manner.
  • the joint cap 66 is provided with a positioning engagement portion 66a that protrudes outward and engages with the coupler portion 65a of the fuel injection valve 65, and the rear portion of the fuel injection valve 65 is connected to the coupler portion.
  • the positioning engagement portion 66a is engaged with the joint cap 66 in a liquid-tight manner so that the positioning engagement portion 66a is engaged with the 65a.
  • a fuel hose 68 which is a fuel pipe, is connected to the joint cap 66.
  • the upstream end of the fuel hose 68 is connected to a pump unit 69 attached to the fuel tank 20, and the fuel hose 68 is connected to the side of the storage box 21 from the pump unit 69. And it extends to the joint cap 66 along the seat rail 15 and the main frame 14 of the vehicle body frame F while passing over the engine body 23.
  • the fuel injection device 67 is provided with a mounted portion 72 that is fastened with a single bolt 74 to a mounting portion 71 that is provided on the intake pipe 46, and the intake air to prevent co-rotation when the bolt 74 is fastened.
  • An engaging portion 73 that engages with the tube 46 is provided.
  • the mounting portion 71 is integrally provided on the upper side wall of the intake pipe 46 so as to be located on the side of the fuel injection valve 65, and the axis of the fuel injection valve 65 with the tip portion inserted into the mounting hole 63.
  • a flat fastening surface 75 along a plane orthogonal to the upper surface of the mounting portion 71 is formed on the upper surface of the mounting portion 71.
  • the joint cap 66 of the fuel injection device 67 is opposed to the fastening surface 75 of the mounting portion 71 from above.
  • a mounting portion 72 is provided.
  • a locking recess 76 is formed on the side surface of the mounting portion 71 and is inserted into the locking recess 76 so that the engaging portion 73 extending from the mounted portion 72 can be engaged with the mounting portion 71.
  • the width d1 of the locking recess 76 is set to be slightly larger than the width d2 of the engaging portion 73 so that a slight gap is generated between the locking recess 76 and the engaging portion 73.
  • the attachment portion 71 provided in the intake pipe 46 is disposed so as to avoid a fastening portion of the intake pipe 46 and the throttle body 47, that is, a fastening portion by the bolts 59 of the flange portions 57 and 58.
  • a removal preventing wall 79 that is close to and faces the enlarged diameter head portion 74a of the bolt 74 from the outside in the axial direction is provided in another part around the intake pipe 46, in this embodiment, the throttle body 47. Further, as shown in FIG. 11, the nut 78 that can come into contact with and engage with the mounting portion 71 is disposed close to the outer surface of the intake pipe 46 so as to prevent the nut 78 from being detached.
  • the fuel injection device 67 includes a fuel injection valve 65 and a joint cap 66 for fitting the rear portion of the fuel injection valve 65 in a liquid-tight manner so as to sandwich the fuel injection valve 65 between the intake pipe 46 and the fuel injection valve 65. Since the attached portion 72 and the engaging portion 73 are provided in the joint cap 66, the number of parts can be reduced by simultaneously attaching the joint cap 66 to the intake pipe 46 together with the fuel injection valve 65. In addition, even if the axial direction of the bolt 74 occurs between the mounting portion 71 and the mounted portion 72, it can be absorbed by the pressure of the fuel passage formed between the fuel injection valve 65 and the joint cap 66. .
  • a nut 78 that can abut and engage with the mounting portion 71 is disposed in the vicinity of the outer surface of the intake pipe 46 so as to prevent detachment from the bolt 74. Since the wall 79 for preventing coming off which is close and opposite from the outside in the direction is provided in the throttle body 47 which is another part around the intake pipe 46, it is possible to surely prevent the bolt 74 from coming off and the nut 78 from falling off. it can.
  • a nut 77 that can be screwed into the bolt 74 to contact and engage with the mounting portion 71 is screwed into the bolt 74 as shown by a chain line.
  • the relative arrangement of the nut 77 and the intake pipe 46 may be determined so as to come into contact with the intake pipe 46 when it is moved to a certain extent by loosening to the side away from the attachment portion 71 while maintaining the state. Even in this case, the nut 77 is screwed into the bolt 74 while the nut 77 is in contact with the intake pipe 46, so that the nut 77 is prevented from being detached from the bolt 74.
  • FIG. 13 shows a third embodiment of the present invention, and the portions corresponding to the first embodiment are only shown with the same reference numerals and will not be described in detail.
  • a bolt 74 is inserted into the attached portion 72 in one of the attaching portion 71 provided in the intake pipe 46 and the attached portion 72 provided in the joint cap 66 of the fuel injection device 67.
  • a collar 81 which is a cylindrical axial force receiving member that receives the fastening axial force of the bolt 74 at both ends, is inserted so as to be able to rotate around the axis, and the collar 81 is the other of the attachment portion 71 and the attachment portion 72.
  • the fitting portion 71 is press-fitted.
  • the collar 81 is formed of a highly rigid metal having an axial length slightly larger than the sum of the thicknesses of the mounting portion 71 and the mounted portion 72 in the direction along the axis of the bolt 74.
  • the bolt 74 abuts and engages with one end of the collar 81 and has an enlarged diameter head 74a at one end that can abut and engage with the attached portion 72.
  • a nut 78 that is in contact with and engaged with the other end of the collar 81 and that can come into contact with and engage with the mounting portion 71 is screwed to the other end of the bolt 74 protruding from 81.
  • FIG. 14 shows a fourth embodiment of the present invention.
  • the parts corresponding to those of the first embodiment are indicated by the same reference numerals, and the detailed description is omitted.
  • a bolt 74 is inserted into the attached portion 72 in one of the attaching portion 71 provided in the intake pipe 46 and the attached portion 72 provided in the joint cap 66 of the fuel injection device 67.
  • a collar 82 which is a cylindrical axial force receiving member that receives the fastening axial force of the bolt 74 at both ends, is inserted so as to be able to rotate around the axis, and is attached to the attachment portion 71 that is the other of the attachment portion 71 and the attachment portion 72.
  • a nut 83 for screwing a bolt 74 inserted through the collar 82 is insert-coupled.
  • the collar 82 is formed of a highly rigid metal having an axial length slightly larger than the thickness of the mounted portion 72 in the direction along the axis of the bolt 74.
  • a slip-out prevention wall 79 provided on the throttle body 47 is disposed so as to approach and face the enlarged diameter head portion 74a of the bolt 74 from the outside in the axial direction. .
  • FIG. 15 shows a fifth embodiment of the present invention.
  • the parts corresponding to those of the first embodiment are indicated by the same reference numerals, and the detailed description is omitted.
  • a bolt 74 having one end with an expandable head 74a that can be engaged is inserted into the collar 77, and abuts and engages with the other end of the collar 77, and a nut that abuts and engages with the mounting portion 71. 78 is screwed to the other end of the bolt 74.
  • At least one of the opposing surfaces of the attachment portion 71 and the attachment portion 72, the fastening surface 75 of the attachment portion 71 is, for example, A protrusion 84 that surrounds the collar 77 in an endless manner is integrally provided, and the protrusion 84 elastically contacts the other of the opposed surfaces, that is, the attached portion 72 side.
  • vibrations can be suppressed without causing rattling between the attachment portion 71 and the attachment portion 72.
  • the present invention can also be applied to the case where the throttle body is used as the intake passage forming body.

Abstract

A fuel injection device includes a fuel injection valve having a front end inserted in an air intake passage body with an annular seal member provided in between. In a mounting structure for the fuel injection device, a mounted section fastened by a single bolt to a mounting receiving section provided to the air intake passage body is provided to the fuel injection device and an engaging section engaging with the air intake passage body side in order to prevent co-rotation of the mounted section in the fastening operation is also provided to the fuel injection device. A circular tube-shaped axial force receiving member (77) for allowing the bolt (74) to pass therethough and receiving axial fastening force at opposite ends thereof is axially rotatably inserted through at least either the mounting receiving section (71) or the mounted section (72). By this, torque is not applied to the bolt even if an external force is applied to the fuel injection device side.

Description

燃料噴射装置の取付け構造Mounting structure of fuel injection device
　本発明は、吸気通路を形成する吸気通路形成体に前記吸気通路に連なる装着孔が設けられ、前記吸気通路形成体との間に環状のシール部材を挟むようにして前記装着孔に挿入される燃料噴射弁を含む燃料噴射装置に、前記吸気通路形成体に設けられる取付け部に単一のボルトで締結される被取付け部が設けられるとともに、前記ボルトによる締結時の共回りを防止すべく前記吸気通路形成体側に係合する係合部が設けられる燃料噴射装置の取付け構造に関する。 According to the present invention, a fuel injection that is inserted into the mounting hole so that an intake passage forming body that forms the intake passage is provided with a mounting hole that is continuous with the intake passage, and an annular seal member is sandwiched between the mounting passage and the intake passage forming body. A fuel injection device including a valve is provided with a mounted portion that is fastened by a single bolt to a mounting portion that is provided in the intake passage forming body, and the intake passage is configured to prevent co-rotation during fastening by the bolt. The present invention relates to a mounting structure of a fuel injection device provided with an engaging portion that engages with a forming body.
　吸気通路を形成する吸気管にシール部材を介して燃料噴射弁の先端部が嵌合され、燃料噴射弁を吸気管との間に挟持するホルダが、前記吸気管の１個所にボルトによって締結されるようにしたものが、特許文献１で知られている。
日本実公昭６３－３４２６号公報 A front end portion of the fuel injection valve is fitted to the intake pipe that forms the intake passage via a seal member, and a holder that clamps the fuel injection valve between the intake pipe and the intake pipe is fastened to the intake pipe by one bolt. This is known from Patent Document 1.
Japanese Utility Model No. 63-3426
　ところが、上記特許文献１で開示されたものでは、吸気管およびホルダの両方にボルトの締結軸力が加わる構成となっているので、ホルダに外力が作用したときにボルトにトルクがかかり易い。 However, in the one disclosed in Patent Document 1, since the fastening axial force of the bolt is applied to both the intake pipe and the holder, torque is easily applied to the bolt when an external force is applied to the holder.
　本発明は、かかる事情に鑑みてなされたものであり、燃料噴射装置側に外力が作用してもボルトにトルクがかからないようにした燃料噴射装置の取付け構造を提供することを目的とする。 The present invention has been made in view of such circumstances, and an object of the present invention is to provide a fuel injection device mounting structure in which no torque is applied to the bolt even when an external force is applied to the fuel injection device side.
　上記目的を達成するために、本発明は、吸気通路を形成する吸気通路形成体に前記吸気通路に連なる装着孔が設けられ、前記吸気通路形成体との間に環状のシール部材を挟むようにして前記装着孔に挿入される燃料噴射弁を含む燃料噴射装置に、前記吸気通路形成体に設けられる取付け部に単一のボルトで締結される被取付け部が設けられるとともに、前記ボルトによる締結時の共回りを防止すべく前記吸気通路形成体側に係合する係合部が設けられる燃料噴射装置の取付け構造において、前記ボルトを挿通せしめて該ボルトの締結軸力を両端で受ける円筒状の軸力受け部材が、前記取付け部および前記被取付け部の少なくとも一方に軸線まわりの回転を可能として挿通されることを第１の特徴とする。 To achieve the above object, according to the present invention, the intake passage forming body forming the intake passage is provided with a mounting hole connected to the intake passage, and an annular seal member is sandwiched between the intake passage forming body and the intake passage forming body. A fuel injection device including a fuel injection valve that is inserted into a mounting hole is provided with a mounted portion that is fastened with a single bolt to a mounting portion that is provided in the intake passage forming body, and at the time of fastening with the bolt. In a fuel injection device mounting structure provided with an engagement portion that engages with the intake passage forming body to prevent rotation, a cylindrical axial force receiver that receives the fastening axial force of the bolt at both ends by inserting the bolt The member is inserted through at least one of the attachment portion and the attachment portion so as to be rotatable around an axis line, as a first feature.
　また本発明は、前記第１の特徴に加えて、前記燃料噴射装置が、前記燃料噴射弁と、該燃料噴射弁を前記吸気通路形成体との間に挟持するようにして燃料噴射弁の後部を液密に嵌合せしめるとともに燃料配管が接続されるジョイントキャップとで構成され、前記被取付け部および前記係合部が前記ジョイントキャップに設けられることを第２の特徴とする。 According to the present invention, in addition to the first feature, the fuel injection device includes a rear portion of the fuel injection valve so that the fuel injection valve is sandwiched between the fuel injection valve and the intake passage forming body. And a joint cap to which a fuel pipe is connected, and the attached portion and the engaging portion are provided on the joint cap.
　本発明は、前記第1または第２の特徴に加えて、前記取付け部および前記被取付け部を貫通する前記軸力受け部材の一端に当接、係合するとともに前記取付け部および前記被取付け部の一方に当接、係合し得る拡径頭部を一端に有するボルトが前記軸力受け部材に挿通され、前記軸力受け部材の他端に当接、係合するとともに前記取付け部および前記被取付け部の他方に当接、係合し得るナットが、前記ボルトの他端部に螺合されることを第３の特徴とする。 In addition to the first or second feature, the present invention abuts and engages with one end of the axial force receiving member that penetrates the mounting portion and the mounted portion, and the mounting portion and the mounted portion. A bolt having an enlarged diameter head at one end that can be brought into contact with and engaged with one of the axial force receiving members is inserted into the axial force receiving member, and is in contact with and engaged with the other end of the axial force receiving member. A third feature is that a nut that can abut and engage with the other of the mounted parts is screwed into the other end of the bolt.
　本発明は、前記第１～第３のいずれかに記載の特徴に加えて、前記軸力受け部材が、前記取付け部および前記被取付け部の一方に軸線まわりの回転を可能として挿通されるとともに前記取付け部および前記被取付け部の他方に圧入されることを第４の特徴とする。 According to the present invention, in addition to the feature described in any one of the first to third aspects, the axial force receiving member is inserted into one of the attachment portion and the attachment portion so as to be rotatable around an axis. A fourth feature is that the fitting portion is press-fitted into the other of the attachment portion and the attachment portion.
　本発明は、前記第３の特徴に加えて、前記取付け部に当接、係合し得る前記ナットが前記ボルトからの離脱を阻止するようにして前記吸気通路形成体の外面に近接して配置され、前記ボルトの拡径頭部に軸方向外方から近接、対向する抜け防止用壁が、前記吸気通路形成体の周囲の他の部品に設けられることを第５の特徴とする。 According to the present invention, in addition to the third feature, the nut capable of contacting and engaging with the attachment portion is disposed close to the outer surface of the intake passage forming body so as to prevent detachment from the bolt. A fifth feature is that a removal prevention wall that is close to and faces the enlarged diameter head portion of the bolt from the outside in the axial direction is provided in another part around the intake passage forming body.
　本発明は、前記第１または第２の特徴に加えて、前記軸力受け部材が、前記取付け部および前記被取付け部の一方に回転可能に挿通され、前記軸力受け部材に挿通されるボルトを螺合せしめるナットが、前記取付け部および前記被取付け部の他方にインサート結合されることを第６の特徴とする。 In the present invention, in addition to the first or second feature, the axial force receiving member is rotatably inserted into one of the attachment portion and the attached portion, and the bolt is inserted into the axial force reception member. According to a sixth aspect of the present invention, a nut for screwing is insertedly connected to the other of the attachment portion and the attachment portion.
　本発明は、前記第６の特徴に加えて、前記ボルトの拡径頭部に軸方向外方から対向する抜け防止用壁が、前記吸気通路形成体の周囲の他の部品に設けられることを第７の特徴とする。 According to the present invention, in addition to the sixth feature, a removal preventing wall facing the diameter-expanded head portion of the bolt from the outside in the axial direction is provided in another part around the intake passage forming body. The seventh feature is provided.
　本発明は、前記第１～第７のいずれかに記載の特徴に加えて、吸気管である前記吸気通路形成体と、該吸気通路形成体に接続されるスロットルボディとの締結部を避けて、前記吸気通路形成体に前記取付け部が設けられることを第８の特徴とする。 In addition to the features described in any one of the first to seventh aspects, the present invention avoids a fastening portion between the intake passage forming body that is an intake pipe and a throttle body connected to the intake passage forming body. An eighth feature is that the intake passage forming body is provided with the attachment portion.
　さらに本発明は、前記第１～第８のいずれかに記載の特徴に加えて、合成樹脂から成る前記取付け部および前記被取付け部の対向面の少なくとも一方に、前記取付け部および前記被取付け部の対向面の他方に弾発接触する突部が一体に突設されることを第９の特徴とする。 Furthermore, the present invention provides the mounting portion and the mounting portion on at least one of the facing surfaces of the mounting portion and the mounting portion made of synthetic resin, in addition to the features described in any one of the first to eighth aspects. A ninth feature is that a projecting portion that elastically contacts the other of the opposing surfaces is integrally projected.
　なお実施例の吸気管４６が本発明の吸気通路形成体に対応し、実施例の燃料ホース６８が本発明の燃料配管に対応し、実施例のカラー７７，８１，８２が本発明の軸力受け部材に対応する。 The intake pipe 46 of the embodiment corresponds to the intake passage forming body of the present invention, the fuel hose 68 of the embodiment corresponds to the fuel pipe of the present invention, and the collars 77, 81, 82 of the embodiment have the axial force of the present invention. Corresponds to the receiving member.
　本発明の第１の特徴によれば、吸気通路形成体に設けられる取付け部に、燃料噴射弁を含む燃料噴射装置に設けられる被取付け部を締結するためのボルトの締結軸力を両端で受ける円筒状の軸力受け部材が取付け部および被取付け部の少なくとも一方に軸線まわりの回転を可能として挿通されるので、燃料噴射装置側に外力が作用しても被取付け部が回転して外力を吸収するのでボルトにトルクがかかることはなく、取付け部および被取付け部間にボルトの軸方向がたが生じてもそのがたは吸気通路形成体および燃料噴射弁間に介装されるシール部材の弾発力で吸収される。また燃料噴射装置が吸気通路形成体に強固に固定されるものではないので、燃料噴射弁の振動が吸気通路側に伝わり難く、騒音が軽減される。 According to the first feature of the present invention, the fastening axial force of the bolt for fastening the attached portion provided in the fuel injection device including the fuel injection valve is received at both ends at the attaching portion provided in the intake passage forming body. Since the cylindrical axial force receiving member is inserted into at least one of the attachment portion and the attachment portion so as to be able to rotate around the axis, the attachment portion rotates to apply the external force even if an external force acts on the fuel injection device side. Torque is not applied to the bolt because it absorbs, and even if the axial direction of the bolt occurs between the mounting portion and the mounted portion, the sealing member interposed between the intake passage forming body and the fuel injection valve It is absorbed by the elasticity of Further, since the fuel injection device is not firmly fixed to the intake passage formation body, the vibration of the fuel injection valve is hardly transmitted to the intake passage side, and noise is reduced.
　また本発明の第２の特徴によれば、燃料噴射装置が、燃料噴射弁と、燃料噴射弁の後部を液密に嵌合せしめるジョイントキャップとで構成され、ジョイントキャップに被取付け部が設けられるので、燃料噴射弁とともにジョイントキャップも吸気通路形成体に同時に取付けるようにして部品点数を低減することができ、また取付け部および被取付け部間にボルトの軸方向がたが生じてもそのがたを燃料噴射弁およびジョイントキャップ間に形成される燃料通路の圧力で吸収することができる。 According to the second aspect of the present invention, the fuel injection device includes a fuel injection valve and a joint cap that fits the rear portion of the fuel injection valve in a liquid-tight manner, and the attachment portion is provided on the joint cap. Therefore, the joint cap as well as the fuel injection valve can be attached to the intake passage forming body at the same time to reduce the number of parts, and even if the axial direction of the bolt occurs between the attachment part and the attachment part, Can be absorbed by the pressure of the fuel passage formed between the fuel injection valve and the joint cap.
　本発明の第３の特徴によれば、取付け部および被取付け部を貫通する軸力受け部材の一端に当接、係合する拡径頭部を一端に有するボルトが軸力受け部材に挿通され、軸力受け部材の他端に当接、係合するナットがボルトの他端部に螺合されるようにして、軸力受け部材、ボルトおよびナットを用いた一般的な部品による簡単な構成で、ボルトにトルクがかからないようにしつつ被取付け部を取付け部に締結することができ、コスト低減を図ることができる。 According to the third aspect of the present invention, a bolt having an enlarged diameter head at one end that is in contact with and engages with one end of an axial force receiving member that penetrates the attachment portion and the attached portion is inserted into the axial force reception member. A simple configuration of a general part using the axial force receiving member, the bolt and the nut so that the nut that contacts and engages the other end of the axial force receiving member is screwed into the other end of the bolt. Thus, the attachment portion can be fastened to the attachment portion while preventing torque from being applied to the bolt, and the cost can be reduced.
　本発明の第４の特徴によれば、軸力受け部材が取付け部および被取付け部の一方に回転可能に挿通され、取付け部および被取付け部の他方に圧入されるので、取付け部および被取付け部の他方に軸力受け部材を組付けて小組することができ、組付け工程を簡素化することができる。 According to the fourth aspect of the present invention, the axial force receiving member is rotatably inserted into one of the attachment portion and the attachment portion and is press-fitted into the other of the attachment portion and the attachment portion. An axial force receiving member can be assembled to the other of the parts to make a small assembly, and the assembly process can be simplified.
　本発明の第５の特徴によれば、前記ボルトに螺合されるナットがボルトからの離脱を阻止するようにして吸気通路形成体の外面に近接して配置され、ボルトの拡径頭部に軸方向外方から対向する抜け防止用壁が吸気通路形成体とは異なる他の部品に設けられるので、ボルト抜けやナットの脱落を確実に防止することができる。 According to a fifth aspect of the present invention, a nut screwed to the bolt is disposed in proximity to the outer surface of the intake passage forming body so as to prevent detachment from the bolt. Since the wall for preventing slipping facing from the outside in the axial direction is provided in another part different from the intake passage forming body, it is possible to reliably prevent the bolt from coming off and the nut from falling off.
　本発明の第６の特徴によれば、取付け部および被取付け部の一方に回転可能に挿通される軸力受け部材に挿通されるボルトが、取付け部および被取付け部の他方にインサート結合されるナットに螺合されるので、ボルトをナットに螺合せしめるときにナットが回らないように工具で押さえる必要がなく、組付け工程を簡素化することができる。 According to the sixth aspect of the present invention, the bolt inserted into the axial force receiving member rotatably inserted into one of the attachment portion and the attachment portion is insert-coupled to the other of the attachment portion and the attachment portion. Since it is screwed into the nut, it is not necessary to hold the bolt with a tool so that the nut does not turn when screwing the bolt into the nut, and the assembly process can be simplified.
　本発明の第７の特徴によれば、ボルトの拡径頭部に軸方向外方から対向する抜け防止用壁が吸気通路形成体以外の他の部品に設けられるので、ボルト抜けを確実に防止することができる。 According to the seventh feature of the present invention, since the wall for preventing slipping that faces the enlarged head portion of the bolt from the outside in the axial direction is provided in other parts other than the intake passage forming body, it is possible to reliably prevent the bolt from coming off. can do.
　本発明の第８の特徴によれば、吸気管である吸気通路形成体およびスロットルボディの締結部を避けて吸気通路形成体に取付け部が設けられるので、吸気管およびスロットルボディの接続状態を外さずに燃料噴射装置のメンテナンスが行えるようにして燃料噴射装置のメンテナンス性を高めることができる。 According to the eighth feature of the present invention, the attachment portion is provided on the intake passage forming body while avoiding the fastening portion of the intake passage forming body and the throttle body which are the intake pipes, so that the connection state of the intake pipe and the throttle body is released. Therefore, maintenance of the fuel injection device can be performed without increasing the maintainability of the fuel injection device.
　さらに本発明の第９の特徴によれば、合成樹脂から成る取付け部および被取付け部の対向面の少なくとも一方に突設される突部が、取付け部および被取付け部の対向面の他方に弾発接触するので、取付け部および被取付け部間にがたが生じないようにして、振動を抑制することができる。 Further, according to the ninth feature of the present invention, the protrusion protruding from at least one of the facing surfaces of the mounting portion and the mounted portion made of synthetic resin is elastic on the other of the facing surfaces of the mounting portion and the mounted portion. Since the contact occurs, vibrations can be suppressed by preventing rattling between the attachment portion and the attachment portion.
図１は第１実施例の自動二輪車の側面図である。（第１実施例）FIG. 1 is a side view of the motorcycle according to the first embodiment. (First embodiment) 図２は車体フレームの一部および内燃機関の側面図である。（第１実施例）FIG. 2 is a side view of a part of the vehicle body frame and the internal combustion engine. (First embodiment) 図３は機関本体および吸気系の要部拡大断面図である。（第１実施例）FIG. 3 is an enlarged cross-sectional view of a main part of the engine body and the intake system. (First embodiment) 図４は図３の４－４線拡大断面図である。（第１実施例）4 is an enlarged sectional view taken along line 4-4 of FIG. (First embodiment) 図５は図４の５－５線断面図である。（第１実施例）5 is a cross-sectional view taken along line 5-5 of FIG. (First embodiment) 図６は図３の要部拡大図である。（第１実施例）FIG. 6 is an enlarged view of a main part of FIG. (First embodiment) 図７は吸気管および燃料噴射装置の斜視図である。（第１実施例）FIG. 7 is a perspective view of the intake pipe and the fuel injection device. (First embodiment) 図８は吸気管および燃料噴射装置を図７とは異なる方向から見た斜視図である。（第１実施例）FIG. 8 is a perspective view of the intake pipe and the fuel injection device as viewed from a direction different from that in FIG. (First embodiment) 図９は図６の９矢視図である。（第１実施例）FIG. 9 is a view taken along arrow 9 in FIG. (First embodiment) 図１０は図８の１０－１０線拡大断面図である。（第１実施例）10 is an enlarged cross-sectional view taken along line 10-10 of FIG. (First embodiment) 図１１は図１０の１１－１１線断面図である。（第１実施例）11 is a cross-sectional view taken along line 11-11 in FIG. (First embodiment) 図１２は第２実施例の図１０に対応した断面図である。（第２実施例）FIG. 12 is a sectional view corresponding to FIG. 10 of the second embodiment. (Second embodiment) 図１３は第３実施例の図９に対応した断面図である。（第３実施例）FIG. 13 is a sectional view corresponding to FIG. 9 of the third embodiment. (Third embodiment) 図１４は第４実施例の図９に対応した断面図である。（第４実施例）FIG. 14 is a sectional view corresponding to FIG. 9 of the fourth embodiment. (Fourth embodiment) 図１５は第５実施例の図９に対応した断面図である。（第５実施例）FIG. 15 is a sectional view corresponding to FIG. 9 of the fifth embodiment. (5th Example)
符号の説明Explanation of symbols
４５・・・吸気通路
４６・・・吸気通路形成体である吸気管
６３・・・装着孔
６４・・・シール部材
６５・・・燃料噴射弁
６６・・・ジョイントキャップ
６７・・・燃料噴射装置
６８・・・燃料配管である燃料ホース
７１・・・取付け部
７２・・・被取付け部
７３・・・係合部
７４・・・ボルト
７４ａ・・・拡径頭部
７７，８１，８２・・・軸力受け部材であるカラー
７８，８３・・・ナット
７９・・・抜け防止用壁
８４・・・突部 45 ... Intake passage 46 ... Intake pipe 63 as an intake passage forming body ... Mounting hole 64 ... Seal member 65 ... Fuel injection valve 66 ... Joint cap 67 ... Fuel injection device 68 ... Fuel hose 71 which is a fuel pipe ... Attachment portion 72 ... Mounted portion 73 ... Engagement portion 74 ... Bolt 74a ... Expanded diameter head 77, 81, 82. · Collars 78, 83 ... nuts 79 ... removal prevention walls 84 ... projections that are axial force receiving members
　以下、本発明の実施の形態を、添付の図面に示した本発明の実施例に基づいて説明する。 Hereinafter, embodiments of the present invention will be described based on examples of the present invention shown in the accompanying drawings.
　図１～図１１は本発明の第１実施例を示すものである。 1 to 11 show a first embodiment of the present invention.
　先ず図１および図２において、この自動二輪車の車体フレームＦは、前輪ＷＦを軸支するフロントフォーク１１および操向ハンドル１２を操向可能に支承するヘッドパイプ１３と、該ヘッドパイプ１３から後ろ下がりに延びるメインフレーム１４と、メインフレーム１４の後部寄り中間部に前端が接合されて段階的に後ろ上がりに延びる左右一対のシートレール１５…と、前記メインフレーム１４の後部に結合されて下方に延びるピボットプレート１６とを備える。 1 and 2, the body frame F of the motorcycle includes a head pipe 13 that pivotally supports a front fork 11 and a steering handle 12 that pivotally support a front wheel WF, and a rear lowering from the head pipe 13. And a pair of left and right seat rails 15 extending forward and rearward in stages, and a lower portion coupled to the rear portion of the main frame 14 and extending downward. And a pivot plate 16.
　前記ピボットプレート１６にはスイングアーム１７の前端部が支軸１８を介して上下揺動可能に支承され、このスイングアーム１７の後部には後輪ＷＲが軸支され、スイングアーム１７およびシートレール１５間にはリヤクッション１９が伸縮自在に設けられる。また後輪ＷＲの上方に配置される燃料タンク２０と、該燃料タンク２０の前方に配置される収納ボックス２１とが前記シートレール１５…に支持されており、燃料タンク２０および収納ボックス２１を上方から覆う乗車用シート２２が前記シートレール１５…に支持される。 A front end portion of a swing arm 17 is supported on the pivot plate 16 via a support shaft 18 so as to be swingable up and down. A rear wheel WR is supported on the rear portion of the swing arm 17, and the swing arm 17 and the seat rail 15 are supported. A rear cushion 19 is telescopically provided between them. A fuel tank 20 disposed above the rear wheel WR and a storage box 21 disposed in front of the fuel tank 20 are supported by the seat rails 15. Is covered by the seat rails 15.
　前記メインフレーム１４の中間部に固着されたエンジンハンガ９０および前記ピボットプレート１６の上下２個所には、４サイクルである内燃機関Ｅの機関本体２３が懸架される。この機関本体２３は、車体フレームＦの幅方向に延びるクランクシャフト２９を回転自在に支承するとともに図示しない変速機を内蔵したクランクケース２４と、シリンダ軸線Ｃを略水平となるまで前傾させてクランクケース２４に結合されるシリンダブロック２５と、該シリンダブロック２５に結合されるシリンダヘッド２６とを備える。前記変速機からの動力を出力する出力軸２７は、前記支軸１８の前方で前記クランクケース２４から突出されており、この出力軸２７からの動力は、チェーン伝動手段２８を介して後輪ＷＲに伝達される。また前記エンジンハンガ９０の前方で前記クランクケース２４の上部にはスタータモータ９２が取付けられる。 The engine body 23 of the internal combustion engine E that is four cycles is suspended from the upper and lower portions of the engine hanger 90 and the pivot plate 16 fixed to the middle portion of the main frame 14. The engine body 23 rotatably supports a crankshaft 29 extending in the width direction of the vehicle body frame F, and cranks a crankcase 24 incorporating a transmission (not shown) and a cylinder axis C by tilting forward until it is substantially horizontal. A cylinder block 25 coupled to the case 24 and a cylinder head 26 coupled to the cylinder block 25 are provided. An output shaft 27 that outputs power from the transmission protrudes from the crankcase 24 in front of the support shaft 18, and the power from the output shaft 27 is transmitted to the rear wheel WR via the chain transmission means 28. Is transmitted to. A starter motor 92 is mounted in front of the engine hanger 90 and above the crankcase 24.
　図３を併せて参照して、前記シリンダブロック２５に形成されるシリンダボア３０にはピストン３１が摺動可能に嵌合され、ピストン３１はコネクティングロッド９１を介して前記クランクシャフト２９に連接される。また前記ピストン３１の頂部を臨ませてシリンダブロック２５およびシリンダヘッド２６間には燃焼室３２が形成される。 Referring also to FIG. 3, a piston 31 is slidably fitted into a cylinder bore 30 formed in the cylinder block 25, and the piston 31 is connected to the crankshaft 29 via a connecting rod 91. A combustion chamber 32 is formed between the cylinder block 25 and the cylinder head 26 with the top of the piston 31 facing.
　前記シリンダヘッド２６には、その上部側壁に開口する吸気ポート３３と、下部側壁に開口する排気ポート３４とが設けられ、前記吸気ポート３３の前記燃焼室３２への連通、遮断を切換える吸気弁３５と、前記排気ポート３４の前記燃焼室３２への連通、遮断を切換える排気弁３６とが前記シリンダヘッド２６に開閉作動可能に配設される。而して吸気弁３５および排気弁３６を開閉駆動する動弁装置３７は、吸気弁３５および排気弁３６に共通な単一のカムシャフト３８と、該カムシャフト３８の回転に応じて揺動して吸気弁３５および排気弁３６をそれぞれ開閉駆動する吸気側および排気側ロッカアーム３９，４０とを備え、前記シリンダヘッド２６に配設される。 The cylinder head 26 is provided with an intake port 33 that opens to the upper side wall and an exhaust port 34 that opens to the lower side wall, and an intake valve 35 that switches communication and blocking of the intake port 33 to the combustion chamber 32. And an exhaust valve 36 for switching between communication and blocking of the exhaust port 34 to the combustion chamber 32 is disposed in the cylinder head 26 so as to be openable and closable. Thus, the valve gear 37 that opens and closes the intake valve 35 and the exhaust valve 36 swings in accordance with the rotation of the camshaft 38 and the single camshaft 38 that is common to the intake valve 35 and the exhaust valve 36. Intake side and exhaust side rocker arms 39 and 40 for opening and closing the intake valve 35 and the exhaust valve 36, respectively, are provided in the cylinder head 26.
　シリンダヘッド２６の下部側壁には、前記排気ポート３４に通じる排気系４１が接続されるものであり、該排気系４１は、前記シリンダヘッド２６の下部側壁に上流端が接続されるとともに機関本体２３の下方を通って後方に延出される排気管４２と、前記後輪ＷＲの右側方に配置されて前記排気管４２の下流端に接続される排気マフラー４３（図１参照）とを備える。 An exhaust system 41 communicating with the exhaust port 34 is connected to the lower side wall of the cylinder head 26, and the exhaust system 41 has an upstream end connected to the lower side wall of the cylinder head 26 and an engine body 23. And an exhaust pipe 42 extending rearward and an exhaust muffler 43 (see FIG. 1) disposed on the right side of the rear wheel WR and connected to the downstream end of the exhaust pipe 42.
　前記シリンダヘッド２６の上部側壁には、前記吸気ポート３３に通じる吸気系４４が接続されるものであり、該吸気系４４は、前記吸気ポート３３に吸気を導くための吸気通路４５を有して合成樹脂たとえばポリフェニレンスルフィドで筒状に形成されるとともに下流端がシリンダヘッド２６に取付けられる吸気通路形成体としての吸気管４６と、該吸気管４６の上流端に接続されるスロットルボディ４７と、前記車体フレームＦにおけるメインフレーム１４の前部に支持されて前記スロットルボディ４７の上流端に接続されるエアクリーナ４８とを備え、スロットルボディ４７およびエアクリーナ４８はゴム製の接続管４９を介して接続される。 An intake system 44 communicating with the intake port 33 is connected to the upper side wall of the cylinder head 26, and the intake system 44 has an intake passage 45 for guiding intake air to the intake port 33. An intake pipe 46 as an intake passage forming body formed in a cylindrical shape with a synthetic resin such as polyphenylene sulfide and having a downstream end attached to the cylinder head 26; a throttle body 47 connected to the upstream end of the intake pipe 46; An air cleaner 48 supported by the front part of the main frame 14 in the vehicle body frame F and connected to the upstream end of the throttle body 47 is provided. The throttle body 47 and the air cleaner 48 are connected via a rubber connecting pipe 49. .
　前記吸気管４６は、シリンダヘッド２６の上部側壁から後方に向かって膨らむように彎曲して形成されるものであり、シリンダヘッド２６の上方に配置されるスロットルボディ４７に接続される。このスロットルボディ４７は、前記吸気管４６の吸気通路４５に通じる吸気通路５０を有するものであり、該吸気通路５０の開度を調節するスロットルバルブ５１がスロットルボディ４７に回動可能に支承される。 The intake pipe 46 is formed by bending so as to swell rearward from the upper side wall of the cylinder head 26, and is connected to a throttle body 47 disposed above the cylinder head 26. The throttle body 47 has an intake passage 50 that communicates with the intake passage 45 of the intake pipe 46, and a throttle valve 51 that adjusts the opening of the intake passage 50 is rotatably supported by the throttle body 47. .
　前記吸気管４６の下流端は、前記シリンダヘッド２６の上部側面に形成される平坦な結合面５２との間に無端状のシール部材５３を介在させて前記シリンダヘッド２６の結合面５２に取付けられるものであり、外側方に張り出すようにして吸気管４６の下流端に一体に設けられるフランジ部５４が前記結合面５２に締結される。 The downstream end of the intake pipe 46 is attached to the coupling surface 52 of the cylinder head 26 with an endless seal member 53 interposed between the flat coupling surface 52 formed on the upper side surface of the cylinder head 26. A flange portion 54 that is integrally provided at the downstream end of the intake pipe 46 so as to protrude outward is fastened to the coupling surface 52.
　図４および図５を併せて参照して、前記吸気管４６の上流端は、前記スロットルボディ４７の吸気管４６側端面に形成される平坦な結合面５５との間に無端状のシール部材５６を介在させて前記結合面５５に取付けられるものであり、吸気管４６の上流端には、外側方に張り出すフランジ部５７が一体に設けられ、スロットルボディ４７の前記吸気管４６側の端部には、前記フランジ部５７に対応して外側方に張り出すフランジ部５８が前記結合面５５の一部を形成するようにして一体に設けられ、フランジ部５７，５８がボルト５９，５９によって締結される。 4 and 5 together, the upstream end of the intake pipe 46 is an endless seal member 56 between a flat coupling surface 55 formed on the end face of the throttle body 47 on the intake pipe 46 side. A flange portion 57 that projects outward is integrally provided at the upstream end of the intake pipe 46, and an end portion of the throttle body 47 on the intake pipe 46 side. The flange portion 58 that projects outwardly corresponding to the flange portion 57 is integrally provided so as to form a part of the coupling surface 55, and the flange portions 57, 58 are fastened by bolts 59, 59. Is done.
　ところで、前記スロットルボディ４７には、該スロットルボディ４７に軸支されるスロットルバルブ５１よりも上流側でスロットルボディ５１の吸気通路５０に上流端を開口させるとともに、前記スロットルバルブ５１よりも下流側で前記吸気通路５０に下流端を通じさせるスロー系通路６１がスロットルバルブ５１を迂回するようにして設けられるのであるが、このスロー系通路６１の下流端６１ａは、前記スロットルボディ４７の結合面５５に対向する前記吸気管４６の端面に形成されて前記シール部材５６を装着せしめるシール溝６０よりも内方でスロットルボディ４７の前記結合面５５に開口する。 By the way, the throttle body 47 has an upstream end opened to the intake passage 50 of the throttle body 51 on the upstream side of the throttle valve 51 pivotally supported by the throttle body 47 and on the downstream side of the throttle valve 51. A slow system passage 61 that passes through the downstream end of the intake passage 50 is provided so as to bypass the throttle valve 51, and the downstream end 61 a of the slow system passage 61 faces the coupling surface 55 of the throttle body 47. An opening is formed in the coupling surface 55 of the throttle body 47 inward of a seal groove 60 formed on the end surface of the intake pipe 46 to which the seal member 56 is mounted.
　しかもスロー系通路６１の下流端６１ａは、前記吸気管４６および前記スロットルボディ４７間に生じる微小間隙からのカーボン等のスロー系通路６１への侵入を極力防止するために、クランク状に屈曲した溝状に形成される。 In addition, the downstream end 61a of the slow passage 61 is a groove bent in a crank shape in order to prevent as much as possible the entry of carbon or the like into the slow passage 61 from the minute gap generated between the intake pipe 46 and the throttle body 47. It is formed in a shape.
　図６～図９において、吸気管４６には前記吸気ポート３３に指向する軸線を有する取付け管部６２が一体に設けられており、該取付け管部６２には、吸気通路４５に連なる装着孔６３が設けられ、吸気管４６との間に環状のシール部材６４を挟むようにして燃料噴射弁６５の先端部が前記装着孔６３に挿入される。 6 to 9, the intake pipe 46 is integrally provided with a mounting pipe portion 62 having an axis directed to the intake port 33, and the mounting pipe portion 62 has a mounting hole 63 connected to the intake passage 45. The tip of the fuel injection valve 65 is inserted into the mounting hole 63 so as to sandwich the annular seal member 64 between the intake pipe 46 and the intake pipe 46.
　前記装着孔６３の中間部には外方に臨む環状の段部６３ａが形成されており、燃料噴射弁６５の外周には、該燃料噴射弁６５の外周に内周を密接させるとともに装着孔６３の内面に外周を密接させる前記シール部材６４を前記段部６３ａとの間に挟む環状の段部６５ａが形成される。 An annular stepped portion 63 a facing outward is formed in the middle portion of the mounting hole 63, and the outer periphery of the fuel injection valve 65 is in close contact with the outer periphery of the fuel injection valve 65 and the mounting hole 63. An annular step portion 65a is formed that sandwiches the seal member 64, whose outer periphery is in close contact with the inner surface, between the step portion 63a.
　前記燃料噴射弁６５と、該燃料噴射弁６５の後部を液密に嵌合せしめる合成樹脂たとえばポリアミドから成るジョイントキャップ６６とで燃料噴射装置６７が構成される。ところでジョイントキャップ６６には、外側方に張り出すようにして前記燃料噴射弁６５が備えるカプラ部６５ａに係合する位置決め係合部６６ａが設けられており、燃料噴射弁６５の後部が、カプラ部６５ａに位置決め係合部６６ａを係合せしめるようにしてジョイントキャップ６６に液密に嵌合される。 A fuel injection device 67 is constituted by the fuel injection valve 65 and a joint cap 66 made of a synthetic resin, for example, polyamide, for fitting the rear portion of the fuel injection valve 65 in a liquid-tight manner. By the way, the joint cap 66 is provided with a positioning engagement portion 66a that protrudes outward and engages with the coupler portion 65a of the fuel injection valve 65, and the rear portion of the fuel injection valve 65 is connected to the coupler portion. The positioning engagement portion 66a is engaged with the joint cap 66 in a liquid-tight manner so that the positioning engagement portion 66a is engaged with the 65a.
　前記ジョイントキャップ６６には、燃料配管である燃料ホース６８の下流端が接続される。この燃料ホース６８の上流端は、図１で示すように、燃料タンク２０に付設されたポンプユニット６９に接続されており、前記燃料ホース６８は、前記ポンプユニット６９から前記収納ボックス２１の側方および前記機関本体２３の上方を通りつつ前記車体フレームＦのシートレール１５およびメインフレーム１４に沿うようにして前記ジョイントキャップ６６まで延出される。 The downstream end of a fuel hose 68, which is a fuel pipe, is connected to the joint cap 66. As shown in FIG. 1, the upstream end of the fuel hose 68 is connected to a pump unit 69 attached to the fuel tank 20, and the fuel hose 68 is connected to the side of the storage box 21 from the pump unit 69. And it extends to the joint cap 66 along the seat rail 15 and the main frame 14 of the vehicle body frame F while passing over the engine body 23.
　燃料噴射装置６７には、吸気管４６に設けられる取付け部７１に単一のボルト７４で締結される被取付け部７２が設けられるとともに、前記ボルト７４による締結時の共回りを防止すべく前記吸気管４６側に係合する係合部７３が設けられる。 The fuel injection device 67 is provided with a mounted portion 72 that is fastened with a single bolt 74 to a mounting portion 71 that is provided on the intake pipe 46, and the intake air to prevent co-rotation when the bolt 74 is fastened. An engaging portion 73 that engages with the tube 46 is provided.
　前記取付け部７１は、燃料噴射弁６５の側方に位置するようにして吸気管４６の上部側壁に一体に設けられており、先端部を前記装着孔６３に挿入せしめた燃料噴射弁６５の軸線と直交する平面に沿う平坦な締結面７５が前記取付け部７１の上面に形成され、燃料噴射装置６７における前記ジョイントキャップ６６に、前記取付け部７１の締結面７５に上方から対向するようにして被取付け部７２が設けられる。また前記取付け部７１の側面には係止凹部７６が形成されており、前記被取付け部７２から延出される前記係合部７３が取付け部７１に係合し得るように係止凹部７６に挿入され、係止凹部７６の幅ｄ１は、該係止凹部７６および係合部７３間にはわずかな隙間が生じるように前記係合部７３の幅ｄ２よりもわずかに大きく設定される。 The mounting portion 71 is integrally provided on the upper side wall of the intake pipe 46 so as to be located on the side of the fuel injection valve 65, and the axis of the fuel injection valve 65 with the tip portion inserted into the mounting hole 63. A flat fastening surface 75 along a plane orthogonal to the upper surface of the mounting portion 71 is formed on the upper surface of the mounting portion 71. The joint cap 66 of the fuel injection device 67 is opposed to the fastening surface 75 of the mounting portion 71 from above. A mounting portion 72 is provided. A locking recess 76 is formed on the side surface of the mounting portion 71 and is inserted into the locking recess 76 so that the engaging portion 73 extending from the mounted portion 72 can be engaged with the mounting portion 71. The width d1 of the locking recess 76 is set to be slightly larger than the width d2 of the engaging portion 73 so that a slight gap is generated between the locking recess 76 and the engaging portion 73.
　しかも吸気管４６に設けられる取付け部７１は、吸気管４６およびスロットルボディ４７の締結部、すなわちフランジ部５７，５８のボルト５９…による締結個所を避けて配置される。 In addition, the attachment portion 71 provided in the intake pipe 46 is disposed so as to avoid a fastening portion of the intake pipe 46 and the throttle body 47, that is, a fastening portion by the bolts 59 of the flange portions 57 and 58.
　図１０において、前記取付け部７１および前記被取付け部７２の少なくとも一方、この第１実施例では前記取付け部７１および前記被取付け部７２の両方に、前記ボルト７４を挿通せしめて該ボルト７４の締結軸力を両端で受ける円筒状の軸力受け部材であるカラー７７が、軸線まわりの回転を可能として挿通される。このカラー７７は、前記ボルト７４の軸線に沿う方向での前記取付け部７１および前記被取付け部７２の厚みの和よりもわずかに大きな軸長を有して高剛性の金属により形成される。 In FIG. 10, the bolt 74 is inserted into at least one of the mounting portion 71 and the mounted portion 72, both the mounting portion 71 and the mounted portion 72 in this first embodiment, and the bolt 74 is fastened. A collar 77, which is a cylindrical axial force receiving member that receives axial force at both ends, is inserted so as to be able to rotate around the axis. The collar 77 is formed of a highly rigid metal having an axial length slightly larger than the sum of the thicknesses of the mounting portion 71 and the mounted portion 72 in the direction along the axis of the bolt 74.
　前記ボルト７４は、前記カラー７７の一端に当接、係合するとともに前記取付け部７１および前記被取付け部７２の一方（この実施例では被取付け部７２）に当接、係合し得る拡径頭部７４ａを一端に有して前記カラー７７に挿通されるものであり、カラー７７から突出した前記ボルト７４の他端部には、前記カラー７７の他端に当接、係合するとともに前記取付け部７１および前記被取付け部７２の他方（この実施例では取付け部７１）に当接、係合し得るナット７８が螺合される。 The bolt 74 abuts and engages with one end of the collar 77 and has a diameter that can abut and engage with one of the attachment portion 71 and the attachment portion 72 (the attachment portion 72 in this embodiment). It has a head 74a at one end and is inserted through the collar 77. The other end of the bolt 74 protruding from the collar 77 abuts and engages the other end of the collar 77 and A nut 78 that can be brought into contact with and engaged with the other of the mounting portion 71 and the mounted portion 72 (the mounting portion 71 in this embodiment) is screwed.
　しかも前記ボルト７４の拡径頭部７４ａに軸方向外方から近接、対向する抜け防止用壁７９が吸気管４６の周囲の他の部品、この実施例ではスロットルボディ４７に設けられる。また前記取付け部７１に当接、係合し得る前記ナット７８は、図１１で示すように、ボルト７４からの離脱を阻止するようにして吸気管４６の外面に近接して配置される。 In addition, a removal preventing wall 79 that is close to and faces the enlarged diameter head portion 74a of the bolt 74 from the outside in the axial direction is provided in another part around the intake pipe 46, in this embodiment, the throttle body 47. Further, as shown in FIG. 11, the nut 78 that can come into contact with and engage with the mounting portion 71 is disposed close to the outer surface of the intake pipe 46 so as to prevent the nut 78 from being detached.
　次にこの第１実施例の作用について説明すると、吸気通路４５に連なるようにして吸気管４６に設けられる装着孔６３に、吸気管４６との間に環状のシール部材６４を挟むようにして燃料噴射弁６５の先端部が挿入され、その燃料噴射弁６５を含む燃料噴射装置６７に、前記吸気管４６に設けられる取付け部７１に単一のボルト７４で締結される被取付け部７２が設けられるとともに、ボルト７４による締結時の共回りを防止すべく前記吸気管４６側に係合する係合部７３が設けられるのであるが、ボルト７４を挿通せしめて該ボルト７４の締結軸力を両端で受ける円筒状のカラー７７が、取付け部７１および被取付け部７２の少なくとも一方、この実施例では両方に軸線まわりの回転を可能として挿通されている。 Next, the operation of the first embodiment will be described. The fuel injection valve is configured such that the annular seal member 64 is sandwiched between the intake pipe 46 and the mounting hole 63 provided in the intake pipe 46 so as to be continuous with the intake passage 45. A fuel injection device 67 including the fuel injection valve 65 is provided with a mounted portion 72 that is fastened with a single bolt 74 to a mounting portion 71 provided in the intake pipe 46. An engagement portion 73 that engages with the intake pipe 46 side is provided to prevent co-rotation at the time of fastening by the bolt 74, but a cylinder that inserts the bolt 74 and receives the fastening axial force of the bolt 74 at both ends. A cylindrical collar 77 is inserted into at least one of the attachment portion 71 and the attachment portion 72, in this embodiment, both so as to be rotatable about the axis.
　したがって燃料噴射装置６７側に外力が作用しても、係止凹部７６および係合部７３間に生じたわずかな隙間分だけ被取付け部７２が回転して外力を吸収するので、ボルト７４にトルクがかかることはなく、取付け部７１および被取付け部７２間にボルト７４の軸方向がたが生じてもそのがたは吸気管４６および燃料噴射弁６５間に介装されるシール部材６４の弾発力で吸収される。また燃料噴射装置６７が吸気管４６に強固に固定されるものではないので、燃料噴射弁６５の振動が吸気通路４５側に伝わり難く、騒音が軽減される。 Therefore, even if an external force acts on the fuel injection device 67 side, the attached portion 72 rotates by a small gap generated between the locking recess 76 and the engaging portion 73 and absorbs the external force. Even if the axial direction of the bolt 74 occurs between the attachment portion 71 and the attachment portion 72, the elastic force of the seal member 64 interposed between the intake pipe 46 and the fuel injection valve 65 is not affected. Absorbed by force. Further, since the fuel injection device 67 is not firmly fixed to the intake pipe 46, the vibration of the fuel injection valve 65 is not easily transmitted to the intake passage 45 side, and noise is reduced.
　ところで、燃料噴射装置６７は、燃料噴射弁６５と、該燃料噴射弁６５を前記吸気管４６との間に挟持するようにして燃料噴射弁６５の後部を液密に嵌合せしめるジョイントキャップ６６とで構成され、被取付け部７２および係合部７３がジョイントキャップ６６に設けられているので、燃料噴射弁６５とともにジョイントキャップ６６も吸気管４６に同時に取付けるようにして部品点数を低減することができ、また取付け部７１および被取付け部７２間にボルト７４の軸方向がたが生じてもそのがたを燃料噴射弁６５およびジョイントキャップ６６間に形成される燃料通路の圧力で吸収することができる。 By the way, the fuel injection device 67 includes a fuel injection valve 65 and a joint cap 66 for fitting the rear portion of the fuel injection valve 65 in a liquid-tight manner so as to sandwich the fuel injection valve 65 between the intake pipe 46 and the fuel injection valve 65. Since the attached portion 72 and the engaging portion 73 are provided in the joint cap 66, the number of parts can be reduced by simultaneously attaching the joint cap 66 to the intake pipe 46 together with the fuel injection valve 65. In addition, even if the axial direction of the bolt 74 occurs between the mounting portion 71 and the mounted portion 72, it can be absorbed by the pressure of the fuel passage formed between the fuel injection valve 65 and the joint cap 66. .
　また取付け部７１および被取付け部７２を貫通するカラー７７の一端に当接、係合するとともに前記被取付け部７２に当接、係合し得る拡径頭部７４ａを一端に有するボルト７４が前記カラー７７に挿通され、カラー７７の他端に当接、係合するとともに前記取付け部７１に当接、係合し得るナット７８が、ボルト７４の他端部に螺合されるので、カラー７７、ボルト７４およびナット７８を用いた一般的な部品による簡単な構成で、ボルト７４にトルクがかからないようにしつつ被取付け部７２を取付け部７１に締結することができ、コスト低減を図ることができる。 A bolt 74 having an enlarged diameter head 74a at one end that contacts and engages with one end of a collar 77 that penetrates the mounting portion 71 and the mounted portion 72 and that can contact and engage with the mounted portion 72. A nut 78 that is inserted through the collar 77 and abuts and engages with the other end of the collar 77 and can abut and engage with the mounting portion 71 is screwed into the other end of the bolt 74. The mounting portion 72 can be fastened to the mounting portion 71 while preventing the torque from being applied to the bolt 74 with a simple configuration using general parts using the bolt 74 and the nut 78, and the cost can be reduced. .
　しかも取付け部７１に当接、係合し得るナット７８がボルト７４からの離脱を阻止するようにして前記吸気管４６の外面に近接して配置され、前記ボルト７４の拡径頭部７４ａに軸方向外方から近接、対向する抜け防止用壁７９が、吸気管４６の周囲の他の部品であるスロットルボディ４７に設けられるので、ボルト７４の抜けやナット７８の脱落を確実に防止することができる。 In addition, a nut 78 that can abut and engage with the mounting portion 71 is disposed in the vicinity of the outer surface of the intake pipe 46 so as to prevent detachment from the bolt 74. Since the wall 79 for preventing coming off which is close and opposite from the outside in the direction is provided in the throttle body 47 which is another part around the intake pipe 46, it is possible to surely prevent the bolt 74 from coming off and the nut 78 from falling off. it can.
　さらに前記吸気管４６に設けられる取付け部７１は、該吸気管４６と、吸気管４６に接続されるスロットルボディ４７との締結部を避けて配置されるので、吸気管４６およびスロットルボディ４７の接続状態を外さずに燃料噴射装置６７のメンテナンスが行えるようにして燃料噴射装置６７のメンテナンス性を高めることができる。 Further, the attachment portion 71 provided in the intake pipe 46 is disposed so as to avoid the fastening portion between the intake pipe 46 and the throttle body 47 connected to the intake pipe 46. Therefore, the connection between the intake pipe 46 and the throttle body 47 is provided. The maintenance of the fuel injection device 67 can be improved by enabling maintenance of the fuel injection device 67 without removing the state.
　本発明の第２実施例として、図１２で示すように、ボルト７４に螺合して取付け部７１に当接、係合し得るナット７７が、鎖線で示すように、ボルト７４に螺合した状態を維持しつつ取付け部７１から離反する側に緩んで或る程度移動したときに、吸気管４６に当接するようにナット７７および吸気管４６の相対配置が定められていてもよい。このようにしても吸気管４６にナット７７が当接した状態でナット７７がボルト７４に螺合していることでナット７７のボルト７４からの離脱は阻止されることになる。 As a second embodiment of the present invention, as shown in FIG. 12, a nut 77 that can be screwed into the bolt 74 to contact and engage with the mounting portion 71 is screwed into the bolt 74 as shown by a chain line. The relative arrangement of the nut 77 and the intake pipe 46 may be determined so as to come into contact with the intake pipe 46 when it is moved to a certain extent by loosening to the side away from the attachment portion 71 while maintaining the state. Even in this case, the nut 77 is screwed into the bolt 74 while the nut 77 is in contact with the intake pipe 46, so that the nut 77 is prevented from being detached from the bolt 74.
　図１３は本発明の第３実施例を示すものであり、上記第１実施例に対応する部分には同一の参照符号を付して図示するのみとし、詳細な説明は省略する。 FIG. 13 shows a third embodiment of the present invention, and the portions corresponding to the first embodiment are only shown with the same reference numerals and will not be described in detail.
　吸気管４６に設けられた取付け部７１、ならびに燃料噴射装置６７のジョイントキャップ６６に設けられた被取付け部７２の一方、この第３実施例では前記被取付け部７２に、ボルト７４を挿通せしめて該ボルト７４の締結軸力を両端で受ける円筒状の軸力受け部材であるカラー８１が軸線まわりの回転を可能として挿通され、該カラー８１は、前記取付け部７１および前記被取付け部７２の他方、この第２実施例では前記取付け部７１に圧入される。而して該カラー８１は、前記ボルト７４の軸線に沿う方向での前記取付け部７１および前記被取付け部７２の厚みの和よりもわずかに大きな軸長を有して高剛性の金属により形成される。 In this third embodiment, a bolt 74 is inserted into the attached portion 72 in one of the attaching portion 71 provided in the intake pipe 46 and the attached portion 72 provided in the joint cap 66 of the fuel injection device 67. A collar 81, which is a cylindrical axial force receiving member that receives the fastening axial force of the bolt 74 at both ends, is inserted so as to be able to rotate around the axis, and the collar 81 is the other of the attachment portion 71 and the attachment portion 72. In the second embodiment, the fitting portion 71 is press-fitted. Thus, the collar 81 is formed of a highly rigid metal having an axial length slightly larger than the sum of the thicknesses of the mounting portion 71 and the mounted portion 72 in the direction along the axis of the bolt 74. The
　前記ボルト７４は、前記カラー８１の一端に当接、係合するとともに前記被取付け部７２に当接、係合し得る拡径頭部７４ａを一端に有して前記カラー８１に挿通され、カラー８１から突出した前記ボルト７４の他端部には、前記カラー８１の他端に当接、係合するとともに前記取付け部７１に当接、係合し得るナット７８が螺合される。 The bolt 74 abuts and engages with one end of the collar 81 and has an enlarged diameter head 74a at one end that can abut and engage with the attached portion 72. A nut 78 that is in contact with and engaged with the other end of the collar 81 and that can come into contact with and engage with the mounting portion 71 is screwed to the other end of the bolt 74 protruding from 81.
　この第３実施例によれば、取付け部７１にカラー８１が圧入されるので、取付け部７１にカラー８１を組付けて小組することができ、組付け工程を簡素化することができる。 According to the third embodiment, the collar 81 is press-fitted into the mounting portion 71, so that the collar 81 can be assembled into the mounting portion 71 and can be assembled into a small assembly, and the assembly process can be simplified.
　図１４は本発明の第４実施例を示すものであり、上記第１実施例に対応する部分には同一の参照符号を付して図示するのみとし、詳細な説明は省略する。 FIG. 14 shows a fourth embodiment of the present invention. The parts corresponding to those of the first embodiment are indicated by the same reference numerals, and the detailed description is omitted.
　吸気管４６に設けられた取付け部７１、ならびに燃料噴射装置６７のジョイントキャップ６６に設けられた被取付け部７２の一方、この第３実施例では前記被取付け部７２に、ボルト７４を挿通せしめて該ボルト７４の締結軸力を両端で受ける円筒状の軸力受け部材であるカラー８２が、軸線まわりの回転を可能として挿通され、取付け部７１および被取付け部７２の他方である取付け部７１に、前記カラー８２に挿通されるボルト７４を螺合せしめるナット８３がインサート結合される。而して前記カラー８２は、前記ボルト７４の軸線に沿う方向での前記被取付け部７２の厚みよりもわずかに大きな軸長を有して高剛性の金属により形成される。 In this third embodiment, a bolt 74 is inserted into the attached portion 72 in one of the attaching portion 71 provided in the intake pipe 46 and the attached portion 72 provided in the joint cap 66 of the fuel injection device 67. A collar 82, which is a cylindrical axial force receiving member that receives the fastening axial force of the bolt 74 at both ends, is inserted so as to be able to rotate around the axis, and is attached to the attachment portion 71 that is the other of the attachment portion 71 and the attachment portion 72. A nut 83 for screwing a bolt 74 inserted through the collar 82 is insert-coupled. Thus, the collar 82 is formed of a highly rigid metal having an axial length slightly larger than the thickness of the mounted portion 72 in the direction along the axis of the bolt 74.
　また図示はしないが、第１実施例と同様に、スロットルボディ４７に設けられる抜け防止用壁７９が、ボルト７４の拡径頭部７４ａに軸方向外方から近接、対向するように配置される。 Although not shown, as in the first embodiment, a slip-out prevention wall 79 provided on the throttle body 47 is disposed so as to approach and face the enlarged diameter head portion 74a of the bolt 74 from the outside in the axial direction. .
　この第４実施例によれば、ボルト７４をナット８２に螺合せしめるときにナット８２が回らないように工具で押さえる必要がなく、組付け工程を簡素化することができる。 According to the fourth embodiment, when the bolt 74 is screwed onto the nut 82, there is no need to press the nut 82 with a tool so that the nut 82 does not turn, and the assembly process can be simplified.
　図１５は本発明の第５実施例を示すものであり、上記第１実施例に対応する部分には同一の参照符号を付して図示するのみとし、詳細な説明は省略する。 FIG. 15 shows a fifth embodiment of the present invention. The parts corresponding to those of the first embodiment are indicated by the same reference numerals, and the detailed description is omitted.
　吸気管４６に設けられた取付け部７１ならびに燃料噴射装置６７のジョイントキャップ６６に設けられた被取付け部７２を貫通するカラー７７の一端に当接、係合するとともに前記被取付け部７２に当接、係合し得る拡径頭部７４ａを一端に有するボルト７４が前記カラー７７に挿通され、カラー７７の他端に当接、係合するとともに前記取付け部７１に当接、係合し得るナット７８が、ボルト７４の他端部に螺合されるのであるが、取付け部７１および被取付け部７２の対向面の少なくとも一方、この第５実施例では、取付け部７１の締結面７５に、たとえばカラー７７を無端状に囲む突部８４が一体に突設され、前記突部８４は前記対向面の他方すなわち被取付け部７２側に弾発接触する。 Abuts and engages with one end of a collar 77 that passes through a mounting portion 71 provided in the intake pipe 46 and a mounting portion 72 provided in a joint cap 66 of the fuel injection device 67, and contacts the mounting portion 72. A bolt 74 having one end with an expandable head 74a that can be engaged is inserted into the collar 77, and abuts and engages with the other end of the collar 77, and a nut that abuts and engages with the mounting portion 71. 78 is screwed to the other end of the bolt 74. In the fifth embodiment, at least one of the opposing surfaces of the attachment portion 71 and the attachment portion 72, the fastening surface 75 of the attachment portion 71 is, for example, A protrusion 84 that surrounds the collar 77 in an endless manner is integrally provided, and the protrusion 84 elastically contacts the other of the opposed surfaces, that is, the attached portion 72 side.
　この第５実施例によれば、取付け部７１および被取付け部７２間にがたが生じないようにして、振動を抑制することができる。 According to the fifth embodiment, vibrations can be suppressed without causing rattling between the attachment portion 71 and the attachment portion 72.
　以上、本発明の実施例を説明したが、本発明は上記実施例に限定されるものではなく、その要旨を逸脱することなく種々の設計変更を行うことが可能である。 The embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the gist thereof.
　たとえば上記実施例では吸気通路形成体として吸気管４６を取り上げた場合について説明したが、スロットルボディを吸気通路形成体として用いる場合にも本発明を適用することができる。 For example, in the above embodiment, the case where the intake pipe 46 is taken up as the intake passage forming body has been described, but the present invention can also be applied to the case where the throttle body is used as the intake passage forming body.

Claims (9)

  1. 　吸気通路（４５）を形成する吸気通路形成体（４６）に前記吸気通路（４５）に連なる装着孔（６３）が設けられ、前記吸気通路形成体（４６）との間に環状のシール部材（６４）を挟むようにして前記装着孔（６３）に挿入される燃料噴射弁（６５）を含む燃料噴射装置（６７）に、前記吸気通路形成体（４６）に設けられる取付け部（７１）に単一のボルト（７４）で締結される被取付け部（７２）が設けられるとともに、前記ボルト（７４）による締結時の共回りを防止すべく前記吸気通路形成体（４６）側に係合する係合部（７３）が設けられる燃料噴射装置の取付け構造において、前記ボルト（７４）を挿通せしめて該ボルト（７４）の締結軸力を両端で受ける円筒状の軸力受け部材（７７，８１，８２）が、前記取付け部（７１）および前記被取付け部（７２）の少なくとも一方に軸線まわりの回転を可能として挿通されることを特徴とする燃料噴射装置の取付け構造。 A mounting hole (63) connected to the intake passage (45) is provided in the intake passage formation body (46) forming the intake passage (45), and an annular seal member ( 64) and a fuel injection device (67) including a fuel injection valve (65) inserted into the mounting hole (63) with a single attachment portion (71) provided in the intake passage forming body (46). And a fitting portion (72) to be fastened by a bolt (74) of the bolt, and an engagement to be engaged with the intake passage forming body (46) side in order to prevent co-rotation at the time of fastening by the bolt (74). In the fuel injection device mounting structure provided with the portion (73), cylindrical axial force receiving members (77, 81, 82) through which the bolt (74) is inserted to receive the fastening axial force of the bolt (74) at both ends. ) Is the mounting portion (7 ) And the mounting structure of the fuel injection system characterized in that it is inserted as a possible rotation about the axis in at least one of the mounting portion (72).
  2. 　前記燃料噴射装置（６７）が、前記燃料噴射弁（６５）と、該燃料噴射弁（６５）を前記吸気通路形成体（４６）との間に挟持するようにして燃料噴射弁（６５）の後部を液密に嵌合せしめるとともに燃料配管（６８）が接続されるジョイントキャップ（６６）とで構成され、前記被取付け部（７２）および前記係合部（７３）が前記ジョイントキャップ（６６）に設けられることを特徴とする請求項１記載の燃料噴射装置の取付け構造。 The fuel injection device (67) holds the fuel injection valve (65) and the fuel injection valve (65) between the intake passage formation body (46) and the fuel injection valve (65). A joint cap (66) to which a rear part is fitted in a liquid-tight manner and a fuel pipe (68) is connected, and the attached portion (72) and the engaging portion (73) are connected to the joint cap (66). The fuel injection device mounting structure according to claim 1, wherein the fuel injection device mounting structure is provided.
  3. 　前記取付け部（７１）および前記被取付け部（７２）を貫通する前記軸力受け部材（７７，８１）の一端に当接、係合するとともに前記取付け部（７１）および前記被取付け部（７２）の一方に当接、係合し得る拡径頭部（７４ａ）を一端に有するボルト（７４）が前記軸力受け部材（７７，８１）に挿通され、前記軸力受け部材（７７，８１）の他端に当接、係合するとともに前記取付け部（７１）および前記被取付け部（７２）の他方に当接、係合し得るナット（７８）が、前記ボルト（７４）の他端部に螺合されることを特徴とする請求項１または２記載の燃料噴射装置の取付け構造。 Abutting and engaging with one end of the axial force receiving member (77, 81) penetrating the attachment portion (71) and the attachment portion (72), and the attachment portion (71) and the attachment portion (72). A bolt (74) having an enlarged diameter head portion (74a) at one end that can be brought into contact with and engaged with one of the axial force receiving members (77, 81) is inserted into the axial force receiving member (77, 81). ) And the other end of the bolt (74) is a nut (78) that can abut and engage with the other end of the mounting portion (71) and the mounted portion (72). The fuel injection device mounting structure according to claim 1, wherein the fuel injection device is screwed into the portion.
  4. 　前記軸力受け部材（８１）が、前記取付け部（７１）および前記被取付け部（７２）の一方に軸線まわりの回転を可能として挿通されるとともに前記取付け部（７１）および前記被取付け部（７２）の他方に圧入されることを特徴とする請求項１～３のいずれかに記載の燃料噴射装置の取付け構造。 The axial force receiving member (81) is inserted into one of the mounting portion (71) and the mounted portion (72) so as to be rotatable around an axis, and the mounting portion (71) and the mounted portion ( 72) The fuel injection device mounting structure according to any one of claims 1 to 3, wherein the fuel injection device is press-fitted into the other of the two.
  5. 　前記取付け部（７１）に当接、係合し得る前記ナット（７８）が前記ボルト（７４）からの離脱を阻止するようにして前記吸気通路形成体（４６）の外面に近接して配置され、前記ボルト（７４）の拡径頭部（７４ａ）に軸方向外方から近接、対向する抜け防止用壁（７９）が、前記吸気通路形成体（４６）の周囲の他の部品に設けられることを特徴とする請求項３記載の燃料噴射装置の取付け構造。 The nut (78) that can abut and engage with the mounting portion (71) is disposed close to the outer surface of the intake passage forming body (46) so as to prevent the nut (78) from being detached from the bolt (74). Further, a slip-off preventing wall (79) that is close to and faces the diameter-enlarged head (74a) of the bolt (74) from the outside in the axial direction is provided in other parts around the intake passage forming body (46). The fuel injection device mounting structure according to claim 3.
  6. 　前記軸力受け部材（８２）が、前記取付け部（７１）および前記被取付け部（７２）の一方に回転可能に挿通され、前記軸力受け部材（８２）に挿通されるボルト（７４）を螺合せしめるナット（８３）が、前記取付け部（７１）および前記被取付け部（７２）の他方にインサート結合されることを特徴とする請求項１または２記載の燃料噴射装置の取付け構造。 The axial force receiving member (82) is rotatably inserted into one of the attaching portion (71) and the attached portion (72), and a bolt (74) inserted into the axial force receiving member (82). The fuel injection device mounting structure according to claim 1 or 2, characterized in that a nut (83) to be screwed is insert-coupled to the other of the mounting portion (71) and the mounted portion (72).
  7. 　前記ボルト（７４）の拡径頭部（７４ａ）に軸方向外方から対向する抜け防止用壁（７９）が、前記吸気通路形成体（４６）の周囲の他の部品に設けられることを特徴とする請求項６記載の燃料噴射装置の取付け構造。 A slip-preventing wall (79) that faces the enlarged-diameter head (74a) of the bolt (74) from the outside in the axial direction is provided in another part around the intake passage forming body (46). The fuel injection device mounting structure according to claim 6.
  8. 　吸気管である前記吸気通路形成体（４６）と、該吸気通路形成体（４６）に接続されるスロットルボディ（４７）との締結部を避けて、前記吸気通路形成体（４６）に前記取付け部（７１）が設けられることを特徴とする請求項１～７のいずれかに記載の燃料噴射装置の取付け構造。 The attachment to the intake passage forming body (46) is avoided by avoiding a fastening portion between the intake passage forming body (46) which is an intake pipe and the throttle body (47) connected to the intake passage forming body (46). The fuel injection device mounting structure according to any one of claims 1 to 7, wherein a portion (71) is provided.
  9. 　合成樹脂から成る前記取付け部（７１）および前記被取付け部（７２）の対向面の少なくとも一方に、前記取付け部（７１）および前記被取付け部（７２）の対向面の他方に弾発接触する突部（８４）が一体に突設されることを特徴とする請求項１～８のいずれかに記載の燃料噴射装置の取付け構造。 At least one of the facing surfaces of the mounting portion (71) and the mounted portion (72) made of synthetic resin is elastically contacted with the other of the facing surfaces of the mounting portion (71) and the mounted portion (72). The fuel injection device mounting structure according to any one of claims 1 to 8, wherein the projecting portion (84) is integrally projected.
PCT/JP2009/053419 2008-03-27 2009-02-25 Mounting structure for fuel injection device WO2009119234A1 (en)

Priority Applications (2)

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CN2009801108627A CN101981304B (en) 2008-03-27 2009-02-25 Mounting structure for fuel injection device
BRPI0910114-4A BRPI0910114B1 (en) 2008-03-27 2009-02-25 assembly structure of fuel injection device

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JP2008082912A JP5142782B2 (en) 2008-03-27 2008-03-27 Mounting structure of fuel injection device
JP2008-082912 2008-03-27

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2955362A1 (en) * 2010-01-19 2011-07-22 Mann & Hummel Gmbh Power supply device for indirect injection multi-cylinder gasoline engine, has protection plate forming deflector extending into power supply branches to channel gasoline drops to cylinder head
CN102822457A (en) * 2010-04-23 2012-12-12 铃木株式会社 Pathway structure of engine induction system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6853129B2 (en) * 2017-07-06 2021-03-31 臼井国際産業株式会社 Injector holder
JP2020043734A (en) * 2018-09-13 2020-03-19 本田技研工業株式会社 Stator core for rotary electric machine and rotary electric machine

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JPS60131666U (en) * 1984-02-10 1985-09-03 マツダ株式会社 Fuel injection valve mounting structure for fuel injection engines
JPH0469402A (en) * 1990-07-09 1992-03-04 Atsugi Unisia Corp Construction for mounting part of resin made part
JPH102266A (en) * 1996-06-17 1998-01-06 Toyota Motor Corp Mounting structure for nozzle clamp
JP2000345943A (en) * 1999-06-02 2000-12-12 Suzuki Motor Corp Mounting structure for fuel distributing pipe

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JP4305339B2 (en) * 2004-09-08 2009-07-29 日産自動車株式会社 Mounting structure of fuel injection device in internal combustion engine
JP4125731B2 (en) * 2005-03-23 2008-07-30 株式会社ケーヒン Holding member for fuel injection valve

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
JPS60131666U (en) * 1984-02-10 1985-09-03 マツダ株式会社 Fuel injection valve mounting structure for fuel injection engines
JPH0469402A (en) * 1990-07-09 1992-03-04 Atsugi Unisia Corp Construction for mounting part of resin made part
JPH102266A (en) * 1996-06-17 1998-01-06 Toyota Motor Corp Mounting structure for nozzle clamp
JP2000345943A (en) * 1999-06-02 2000-12-12 Suzuki Motor Corp Mounting structure for fuel distributing pipe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2955362A1 (en) * 2010-01-19 2011-07-22 Mann & Hummel Gmbh Power supply device for indirect injection multi-cylinder gasoline engine, has protection plate forming deflector extending into power supply branches to channel gasoline drops to cylinder head
CN102822457A (en) * 2010-04-23 2012-12-12 铃木株式会社 Pathway structure of engine induction system

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CN101981304B (en) 2013-05-01
JP5142782B2 (en) 2013-02-13
AR070538A1 (en) 2010-04-14
BRPI0910114B1 (en) 2021-01-12
CN101981304A (en) 2011-02-23
BRPI0910114A2 (en) 2019-03-06
JP2009235989A (en) 2009-10-15

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