WO2022113749A1 - 燃料分配管 - Google Patents
燃料分配管 Download PDFInfo
- Publication number
- WO2022113749A1 WO2022113749A1 PCT/JP2021/041507 JP2021041507W WO2022113749A1 WO 2022113749 A1 WO2022113749 A1 WO 2022113749A1 JP 2021041507 W JP2021041507 W JP 2021041507W WO 2022113749 A1 WO2022113749 A1 WO 2022113749A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- diameter portion
- pipe
- fuel
- connecting member
- tip
- Prior art date
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 182
- 238000009826 distribution Methods 0.000 title claims abstract description 73
- 238000003860 storage Methods 0.000 claims abstract description 84
- 238000002347 injection Methods 0.000 claims abstract description 13
- 239000007924 injection Substances 0.000 claims abstract description 13
- 230000037431 insertion Effects 0.000 claims description 64
- 238000003780 insertion Methods 0.000 claims description 64
- 230000002093 peripheral effect Effects 0.000 claims description 51
- 230000007423 decrease Effects 0.000 claims description 8
- 238000005219 brazing Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 9
- 230000008961 swelling Effects 0.000 description 9
- 238000003466 welding Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000010349 pulsation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
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
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/24—Fuel-injection apparatus with sensors
- F02M2200/247—Pressure sensors
Definitions
- One aspect of the present invention relates to a fuel distribution pipe that distributes and supplies fuel to a plurality of fuel injection devices.
- Patent Document 1 describes a fuel delivery pipe to which a fuel supply path (fuel pipe) is connected to distribute and supply fuel to a plurality of injectors.
- a fuel supply path fuel pipe
- an orifice for reducing the pulsation of the fuel delivery pipe is formed at the tip of the main pipe hole (storage space) formed inside the fuel delivery pipe.
- the fuel distribution pipe includes a pipe member that forms a storage space for storing fuel inside, and a connecting member that is inserted and joined to the tip of the pipe member and has an inner diameter smaller than the inner diameter of the pipe member.
- a connecting member that is inserted and joined to the tip of the pipe member and has an inner diameter smaller than the inner diameter of the pipe member.
- one aspect of the present invention is to provide a fuel component pipe capable of reducing the stress generated in the pipe member while allowing the pipe member to swell.
- the fuel distribution pipe is a fuel distribution pipe that distributes and supplies fuel supplied from the fuel pipe to a plurality of fuel injection devices, and is a pipe member that forms a storage space for storing fuel inside.
- a connecting member having a through hole formed by being inserted and joined to the tip of the pipe member to be connected to the storage space, and the connecting member has an intermediate diameter portion adjacent to the storage space and an intermediate diameter portion. It has a small diameter portion arranged on the opposite side of the storage space, and the intermediate diameter portion has an inner diameter larger than the inner diameter of the small diameter portion and smaller than the inner diameter of the pipe member.
- the connecting member inserted and joined to the tip of the pipe member has an intermediate diameter portion adjacent to the storage space and a small diameter portion arranged on the opposite side of the storage space from the intermediate diameter portion.
- the intermediate diameter portion has an inner diameter smaller than the inner diameter of the pipe member and larger than the inner diameter of the small diameter portion. That is, in the connecting member, the rigidity of the intermediate diameter portion adjacent to the storage space is lower than the rigidity of the small diameter portion. Therefore, when the pressure of the fuel is applied, the intermediate diameter portion of the connecting member also tends to swell following the central portion forming the storage space of the pipe member. As a result, the stress generated at the boundary between the central portion and the tip portion of the pipe member is suppressed.
- the cross section orthogonal to the central axis of the pipe member in the storage space may be substantially the same over the entire area in the extending direction of the pipe member.
- the cross section orthogonal to the central axis of the pipe member in the storage space is substantially the same over the entire area in the extending direction of the pipe member, so that when the pipe member is inflated due to the pressure of the fuel, it is localized. It is possible to suppress the occurrence of stress concentration.
- the connecting member may further have a tapered diameter portion that is connected to the intermediate diameter portion and the small diameter portion and has an inner diameter that decreases from the intermediate diameter portion side to the small diameter portion side.
- the connecting member is formed with a tapered diameter portion that is connected to the intermediate diameter portion and the small diameter portion and has an inner diameter that decreases from the intermediate diameter portion side to the small diameter portion side. Can be made easier to swell by following the central portion forming the storage space of the pipe member.
- the angle formed by the inner peripheral surface of the tapered diameter portion in the reference cross section including the central axis of the pipe member may be 110 ° or more and 160 ° or less.
- the angle formed by the inner peripheral surface of the tapered diameter portion in the reference cross section including the central axis of the pipe member is 110 ° or more and 160 ° or less, so that the connecting member can be prevented from becoming too long.
- the intermediate diameter portion of the connecting member can be appropriately inflated.
- the length of the intermediate diameter portion may be shorter than the insertion length of the connecting member with respect to the pipe member and may be longer than the wall thickness of the intermediate diameter portion.
- the length of the intermediate diameter portion in the extending direction of the pipe member is shorter than the insertion length of the connecting member with respect to the pipe member and longer than the wall thickness of the intermediate diameter portion, so that the connecting member becomes too long. It is possible to appropriately inflate the intermediate diameter portion of the connecting member.
- the wall thickness of the intermediate diameter portion may be 0.3 times or more and 1.5 times or less the wall thickness of the pipe member.
- the wall thickness of the intermediate diameter portion is 0.3 times or more and 1.5 times or less the wall thickness of the pipe member, so that the intermediate diameter portion can be sufficiently secured while maintaining the intermediate diameter portion. , It is possible to make it easier to swell by following the central portion forming the storage space of the pipe member.
- connection member may be a pipe connection member connected to the fuel pipe.
- the connecting member is a pipe connecting member, the fuel supplied from the fuel pipe can be appropriately supplied to the storage space for a long period of time.
- the inner diameter of the small diameter portion may be 1 mm or more and 11 mm or less.
- the connecting member is a piping connecting member
- the inner diameter of the small diameter portion is 1 mm or more and 11 mm or less, so that the fuel supplied from the fuel piping is appropriately supplied to the storage space and the fuel component is supplied. It is possible to prevent the piping from becoming too large and to prevent the passage of fuel from being obstructed.
- the connecting member may be a sensor connecting member connected to a fuel pressure sensor that detects the pressure of the fuel stored in the storage space.
- the connecting member since the connecting member is a sensor connecting member, the pressure of the fuel stored in the storage space can be appropriately transmitted to the fuel pressure sensor for a long period of time.
- the inner diameter of the small diameter portion may be 3 mm or more and 9 mm or less.
- the connecting member is a sensor connecting member
- the inner diameter of the small diameter portion is 3 mm or more and 9 mm or less, so that the pressure of the fuel stored in the storage space is appropriately transmitted to the fuel pressure sensor. It is possible to prevent the fuel component pipe from becoming too large and to prevent the passage of fuel from being obstructed.
- FIG. 1 is a schematic front view of the fuel distribution pipe according to the first embodiment.
- FIG. 2 is a schematic cross-sectional view showing a part of the fuel distribution pipe shown in FIG.
- FIG. 3 is an enlarged schematic cross-sectional view of the periphery of the pipe connecting member in FIG.
- FIG. 4 is an enlarged schematic cross-sectional view of the periphery of the sensor connecting member in FIG.
- FIG. 5 is a schematic cross-sectional view showing a part of the fuel distribution pipe of Comparative Example 1.
- FIG. 6 is a schematic cross-sectional view of the fuel distribution pipe according to the second embodiment.
- FIG. 7 is a schematic cross-sectional view showing a part of the fuel distribution pipe shown in FIG.
- FIG. 8 is an enlarged schematic cross-sectional view of the periphery of the lid member in FIG. 7.
- FIG. 9 is a schematic cross-sectional view showing a part of the fuel distribution pipe of Comparative Example 2.
- FIG. 1 is a schematic perspective view of the fuel distribution pipe according to the first embodiment.
- FIG. 2 is a schematic cross-sectional view showing a part of the fuel distribution pipe shown in FIG.
- the fuel distribution pipe 1 according to the present embodiment uses a high-pressure fuel compressed by a high-pressure pump (not shown) and supplied from the fuel pipe (not shown) to an engine (not shown). ) Is distributed and supplied to the fuel injection device (not shown) provided corresponding to each cylinder (not shown).
- the fuel distribution pipe 1 is also called a fuel injection rail, a fuel delivery pipe, a common rail, or the like.
- the fuel distribution pipe 1 includes a pipe member 2, a plurality of housings 3, a pipe connecting member 4, and a sensor connecting member 5. Although the drawing shows the fuel distribution pipe 1 including the four housings 3, the number of the housings 3 is not particularly limited as long as it is two or more.
- the pipe member 2 is a member for storing fuel pumped from a high-pressure pump in a high-pressure state in order to supply fuel to a plurality of fuel injection devices.
- the pipe member 2 is formed, for example, in a circular tubular shape extending linearly along the cylinder row direction (crank axis direction) of the engine.
- the tube shape of the tube member 2 does not necessarily have to be a circular tube extending linearly, and can be various shapes.
- a storage space 21 for storing fuel is formed inside the pipe member 2.
- the pipe connection member 4 is inserted and joined to the tip portion 22 of one side of the pipe member 2 (left side in FIGS. 1 and 2), and the other side of the pipe member 2 (right side in FIGS. 1 and 2).
- the sensor connecting member 5 is inserted and joined to the tip portion 23 of the above. Therefore, the storage space 21 is formed by the central portion 24 of the pipe member 2, in which the pipe connecting member 4 and the sensor connecting member 5 are not inserted and joined.
- the pipe member 2 is fixed to the engine by a member such as a stay (not shown).
- the cross section of the storage space 21 orthogonal to the central axis A of the pipe member 2 is substantially the same in the entire area of the pipe member 2 in the extending direction B.
- substantially the same is not limited to the case where they are completely the same, but means that a manufacturing error or tolerance of about ⁇ 10% is allowed.
- the plate thickness between the thickest portion and the thinnest portion of the pipe member 2 is set as the reference plate thickness
- the plate thickness at an arbitrary position of the pipe member 2 is ⁇ of the reference plate thickness. It is within 10%.
- the central axis A of the pipe member 2 is a line passing through the radial center of the pipe member 2 and extending in the extending direction B of the pipe member 2.
- the housing 3 is a member for holding the fuel injection device airtightly and supplying fuel to the fuel injection device from the storage space 21 of the pipe member 2.
- the housing 3 is joined on the peripheral surface of the pipe member 2.
- the housing 3 can be joined to the pipe member 2 by brazing, welding, or the like.
- the housing 3 is provided corresponding to the fuel injection device.
- FIG. 3 is an enlarged schematic cross-sectional view of the periphery of the pipe connection member in FIG.
- the pipe connecting member 4 is a connecting member connected to the fuel pipe.
- the pipe connecting member 4 is formed in a cylindrical shape centered on the central axis A of the pipe member 2.
- the tip of one side of the pipe connecting member 4 in the extending direction B (the tip on the left side in FIGS. 1 to 3) is referred to as the outer tip 4a, and the tip of the other side of the pipe connecting member 4 in the extending direction B (FIGS. 1 to 1 to 3).
- the tip on the right side in FIG. 3) is referred to as the inner tip 4b.
- the pipe connecting member 4 is inserted and joined to the tip portion 22 of the pipe member 2.
- the pipe connecting member 4 can be joined to the tip portion 22 of the pipe member 2 by brazing, welding, or the like. In the present embodiment, the pipe connecting member 4 is joined to the pipe member 2 by brazing.
- the outer peripheral surface of the pipe connecting member 4 has a male screw surface 41, an insertion surface 42, and a contact surface 43.
- the male screw surface 41 forms a male screw for screwing the fuel pipe.
- the male threaded surface 41 extends from the outer tip 4a toward the inner tip 4b along the extending direction B.
- a tapered surface or the like may be formed between the male screw surface 41 and the outer tip 4a to facilitate screwing of the fuel pipe.
- the insertion surface 42 extends cylindrically from the inner tip 4b toward the outer tip 4a along the extending direction B.
- the contact surface 43 rises from the insertion surface 42 toward the outside in the radial direction of the pipe connecting member 4 on the outer tip 4a side of the insertion surface 42. Then, in a state where the insertion surface 42 is inserted into the tip portion 22 of the pipe member 2 and the contact surface 43 is in contact with the tip surface 25 of the tip portion 22 of the pipe member 2, the insertion surface 42 is the tip of the pipe member 2. It is brazed to the part 22.
- the contact surface 43 of the pipe connecting member 4 may also be brazed to the tip surface 25 of the pipe member 2.
- the tip surface 25 of the pipe member 2 is the end surface of the pipe member 2 on the tip 22 side in the extending direction B. Further, a tapered surface or the like may be formed between the insertion surface 42 and the inner tip 4b to facilitate the insertion of the pipe connecting member 4 into the tip 22 of the pipe member 2.
- the outer diameter of the insertion surface 42 before being inserted into the tip portion 22 of the pipe member 2 may be larger than the inner diameter of the pipe member 2.
- the insertion surface 42 is inserted into the tip portion 22 of the pipe member 2 and brazed, so that the insertion surface 42 is brazed in a state of being press-fitted into the tip portion 22 of the pipe member 2.
- the insertion surface 42 may have irregularities formed by knurling or the like, the maximum outer diameter of the convex may be larger than the inner diameter of the pipe member 2, and the minimum outer diameter of the concave may be smaller than the inner diameter of the pipe member 2. ..
- the convex portion is pressed against the tip portion 22 of the pipe member 2, and the brazing material enters the concave portion, so that the bonding strength of the insertion surface 42 with respect to the tip portion 22 of the pipe member 2 can be increased.
- the inner peripheral surface of the pipe connecting member 4 forms a through hole 44 for supplying the high-pressure fuel supplied from the fuel pipe to the storage space 21.
- the through hole 44 is adjacent to the storage space 21 and extends in the extending direction B about the central axis A of the pipe member 2.
- the pipe connection member 4 has an intermediate diameter portion 45, a small diameter portion 46, and a tapered diameter portion 47.
- the intermediate diameter portion 45 is a part of the pipe connecting member 4 adjacent to the storage space 21.
- the small diameter portion 46 is a part of the pipe connecting member 4 located on the opposite side of the storage space 21 from the intermediate diameter portion 45.
- the tapered diameter portion 47 is a part of the pipe connecting member 4 located between the intermediate diameter portion 45 and the small diameter portion 46 and connected to the intermediate diameter portion 45 and the small diameter portion 46.
- the intermediate diameter portion 45, the tapered diameter portion 47, and at least a part of the small diameter portion 46 form an insertion surface 42. That is, the insertion surface 42 is formed by an outer peripheral surface of the intermediate diameter portion 45, an outer peripheral surface of the tapered diameter portion 47, and an outer peripheral surface of at least a part of the small diameter portion 46.
- the inner diameter D2 of the small diameter portion 46 is smaller than the inner diameter D1 of the pipe member 2.
- the inner diameter D2 of the small diameter portion 46 is the smallest inner diameter in the through hole 44.
- the inner diameter D1 of the pipe member 2 is not particularly limited.
- the inner diameter D1 of the pipe member 2 may be 10 mm or more, preferably 11 mm or more, more preferably 12 mm or more, from the viewpoint of suppressing the radiated sound generated by the pulsation of the fuel caused by the operation of the high-pressure pump.
- the inner diameter D1 of the pipe member 2 may be 16 mm or less, preferably 15 mm or less, and more preferably 14 mm or less.
- the inner diameter D1 of the pipe member 2 may be 10 mm or more and 16 mm or less, preferably 11 mm or more and 15 mm or less, and more preferably 12 mm or more and 14 mm or less.
- the inner diameter D2 of the small diameter portion 46 is not particularly limited.
- the inner diameter D2 of the small diameter portion 46 may be 1 mm or more, preferably 2 mm or more, more preferably 3 mm or more, from the viewpoint of suppressing the passage of fuel from being obstructed. Further, from the viewpoint of suppressing the fuel distribution pipe 1 from becoming too large, the inner diameter D2 of the small diameter portion 46 may be 11 mm or less, preferably 10 mm or less, and more preferably 9 mm or less.
- the inner diameter D2 of the small diameter portion 46 may be 1 mm or more and 11 mm or less, preferably 2 mm or more and 10 mm or less, and more preferably 3 mm or more and 9 mm or less.
- the inner diameter D3 of the intermediate diameter portion 45 is larger than the inner diameter D2 of the small diameter portion 46 and smaller than the inner diameter D1 of the pipe member 2. Therefore, in the pipe connecting member 4, the rigidity of the intermediate diameter portion 45 adjacent to the storage space 21 is lower than the rigidity of the small diameter portion 46. As a result, in the pipe connecting member 4, when the central portion 24 of the pipe member 2 swells due to the pressure of the fuel, the intermediate diameter portion 45 of the pipe connecting member 4 also tends to swell following the central portion 24 of the pipe member 2. Become.
- the inner diameter D3 of the intermediate diameter portion 45 is not particularly limited as long as the above conditions are satisfied.
- the inner diameter D3 of the intermediate diameter portion 45 is larger than the orifice diameter and has a size that does not substantially function as an orifice in relation to the small diameter portion 46 (orifice effect).
- Substantially no size eg, greater than 1 mm, preferably greater than 2 mm, even more preferably greater than 3 mm.
- the inner diameter D3 of the intermediate diameter portion 45 may be smaller than 14 mm, preferably smaller than 13 mm, and further preferably smaller than 12 mm from the viewpoint of easily swelling following the central portion 24 of the pipe member 2.
- the inner diameter D1 of the pipe member 2 is larger than 1 mm and smaller than 14 mm, preferably larger than 2 mm and smaller than 13 mm, and more preferably larger than 3 mm and smaller than 12 mm. May be good.
- the length L1 of the intermediate diameter portion 45 may be shorter than the insertion length L2 of the pipe connecting member 4 with respect to the pipe member 2.
- the insertion length L2 of the pipe connection member 4 with respect to the pipe member 2 is the length of the insertion surface 42 in the extending direction B.
- the length L1 of the intermediate diameter portion 45 in the extending direction B may be longer than the wall thickness T1 of the intermediate diameter portion 45.
- the wall thickness T1 of the intermediate diameter portion 45 is not particularly limited.
- the wall thickness T1 of the intermediate diameter portion 45 is 0.3 times or more, preferably 0.7 times or more, more preferably 0.7 times or more the wall thickness T2 of the pipe member 2. May be 0.9 times or more.
- the wall thickness T1 of the intermediate diameter portion 45 is 1.5 times or less, preferably 1.3 times or less the wall thickness T2 of the pipe member 2. , More preferably 1.1 times or less.
- the wall thickness T1 of the intermediate diameter portion 45 is 0.3 times or more and 1.5 times or less, preferably 0.7 times the wall thickness T2 of the pipe member 2. It may be double or more and 1.3 times or less, more preferably 0.9 times or more and 1.1 times or less.
- the tapered diameter portion 47 is connected to the intermediate diameter portion 45 and the small diameter portion 46.
- the inner diameter of the tapered diameter portion 47 becomes smaller from the intermediate diameter portion 45 side (inner tip 4b side) to the smaller diameter portion 46 side (outer tip 4a side).
- the inner peripheral surface of the tapered diameter portion 47 may extend linearly from the intermediate diameter portion 45 to the small diameter portion 46, and the intermediate diameter portion may be formed. It may extend from 45 to the small diameter portion 46 in a curved shape, or may bend and extend from the intermediate diameter portion 45 to the small diameter portion 46.
- the angle ⁇ 1 formed by the inner peripheral surface of the tapered diameter portion 47 in the reference cross section including the central axis A is not particularly limited.
- the angle ⁇ 1 may be 110 ° or more, preferably 113 ° or more, and more preferably 115 ° or more, from the viewpoint of suppressing the pipe connecting member 4 from becoming too long.
- the angle ⁇ 1 is 160 ° or less, preferably 155 ° or less, more preferably 150 ° or less, from the viewpoint that the intermediate diameter portion 45 of the sensor connecting member 5 easily swells following the central portion 24 of the pipe member 2. There may be.
- the angle ⁇ 1 may be 110 ° or more and 160 ° or less, preferably 113 ° or more and 155 ° or less, and more preferably 115 ° or more and 150 ° or less. ..
- the angle ⁇ 1 formed by the inner peripheral surface of the tapered diameter portion 47 in the reference cross section including the central axis A is determined. This is the angle formed by the virtual line connecting the tip of the inner peripheral surface of the tapered diameter portion 47 on the intermediate diameter portion 45 side and the tip on the small diameter portion 46 side.
- FIG. 4 is an enlarged schematic cross-sectional view of the periphery of the sensor connecting member in FIG.
- the sensor connecting member 5 is a connecting member connected to a fuel pressure sensor (not shown) that detects the pressure of the fuel stored in the storage space 21.
- the sensor connecting member 5 is formed in a cylindrical shape centered on the central axis A of the tube member 2.
- the tip on one side of the sensor connecting member 5 in the extending direction B (the tip on the left side in FIGS. 1, 2 and 4) is referred to as the inner tip 5a, and the tip on the other side of the sensor connecting member 5 in the extending direction B (the tip on the other side in the extending direction B).
- the right tip in FIGS. 1, 2 and 4) is referred to as the outer tip 5b.
- the sensor connecting member 5 is inserted and joined to the tip portion 23 of the pipe member 2.
- the sensor connecting member 5 can be joined to the tip portion 23 of the pipe member 2 by brazing, welding, or the like. In the present embodiment, the sensor connecting member 5 is joined to the pipe member 2 by brazing.
- the outer peripheral surface of the sensor connecting member 5 has an insertion surface 51 and a contact surface 52.
- the insertion surface 51 extends cylindrically from the inner tip 5a toward the outer tip 5b along the extending direction B.
- the contact surface 52 rises from the insertion surface 51 toward the outside in the radial direction of the sensor connecting member 5 on the outer tip 5b side of the insertion surface 51. Then, in a state where the insertion surface 51 is inserted into the tip portion 23 of the pipe member 2 and the contact surface 52 is in contact with the tip surface 26 of the tip portion 23 of the pipe member 2, the insertion surface 51 is the tip of the pipe member 2. It is brazed to the part 23.
- the contact surface 52 of the sensor connecting member 5 may also be brazed to the tip surface 26 of the tube member 2.
- the tip surface 26 of the pipe member 2 is the end surface of the pipe member 2 on the tip portion 23 side in the extending direction B. Further, a tapered surface or the like may be formed between the insertion surface 51 and the inner tip 5a to facilitate the insertion of the sensor connecting member 5 into the tip 23 of the tube member 2.
- the outer diameter of the insertion surface 51 before being inserted into the tip portion 23 of the pipe member 2 may be larger than the inner diameter of the pipe member 2.
- the insertion surface 51 is inserted into the tip portion 23 of the pipe member 2 and brazed, so that the insertion surface 51 is brazed in a state of being press-fitted into the tip portion 23 of the pipe member 2.
- the insertion surface 51 may have irregularities formed by knurling or the like, the maximum outer diameter of the convex may be larger than the inner diameter of the pipe member 2, and the minimum outer diameter of the concave may be smaller than the inner diameter of the pipe member 2. ..
- the convex portion is pressed against the tip portion 23 of the pipe member 2, and the brazing material enters the concave portion, so that the bonding strength of the insertion surface 51 with respect to the tip portion 23 of the pipe member 2 can be increased.
- the inner peripheral surface of the sensor connecting member 5 forms a through hole 53 for supplying the high-pressure fuel supplied from the fuel pipe to the storage space 21.
- the through hole 53 is adjacent to the storage space 21 and extends in the extending direction B about the central axis A of the pipe member 2.
- the sensor connecting member 5 has an intermediate diameter portion 54, a small diameter portion 55, a tapered diameter portion 56, and a sensor connecting portion 57.
- the intermediate diameter portion 54 is a part of the sensor connecting member 5 adjacent to the storage space 21.
- the small diameter portion 55 is a part of the sensor connecting member 5 located on the opposite side of the storage space 21 from the intermediate diameter portion 54.
- the tapered diameter portion 56 is a part of the sensor connecting member 5 located between the intermediate diameter portion 54 and the small diameter portion 55 and connected to the intermediate diameter portion 54 and the small diameter portion 55.
- the sensor connecting portion 57 is a part of the sensor connecting member 5 located on the opposite side of the storage space 21 of the small diameter portion 55.
- the intermediate diameter portion 54, the tapered diameter portion 56, and at least a part of the small diameter portion 55 form an insertion surface 51. That is, the insertion surface 51 is formed by an outer peripheral surface of the intermediate diameter portion 54, an outer peripheral surface of the tapered diameter portion 56, and an outer peripheral surface of at least a part of the small diameter portion 55.
- the inner diameter D4 of the small diameter portion 55 is smaller than the inner diameter D1 of the pipe member 2.
- the inner diameter D4 of the small diameter portion 55 is the smallest inner diameter in the through hole 53.
- the inner diameter D4 of the small diameter portion 55 is not particularly limited.
- the inner diameter D4 of the small diameter portion 55 is 3 mm or more, preferably 3.5 mm or more, more preferably 4 mm or more. May be.
- the inner diameter D4 of the small diameter portion 55 may be 9 mm or less, preferably 7 mm or less, and more preferably 5 mm or less.
- the inner diameter D4 of the small diameter portion 55 may be 3 mm or more and 9 mm or less, preferably 3.5 mm or more and 7 mm or less, and more preferably 4 mm or more and 5 mm or less. ..
- the inner diameter D5 of the intermediate diameter portion 54 is larger than the inner diameter D4 of the small diameter portion 55 and smaller than the inner diameter D1 of the pipe member 2. Therefore, in the sensor connecting member 5, the rigidity of the intermediate diameter portion 54 adjacent to the storage space 21 is lower than the rigidity of the small diameter portion 55. As a result, in the sensor connecting member 5, when the central portion 24 of the pipe member 2 swells due to the pressure of the fuel, the intermediate diameter portion 54 of the sensor connecting member 5 also tends to swell following the central portion 24 of the pipe member 2. ..
- the inner diameter D5 of the intermediate diameter portion 54 is not particularly limited as long as the above conditions are satisfied.
- the inner diameter D5 of the intermediate diameter portion 54 is larger than the orifice diameter and has a size that does not substantially function as an orifice in relation to the small diameter portion 55 (orifice effect).
- Substantially no size eg, greater than 3 mm, preferably greater than 3.5 mm, even more preferably greater than 4 mm.
- the inner diameter D5 of the intermediate diameter portion 54 may be smaller than 14 mm, preferably smaller than 13 mm, and further preferably smaller than 12 mm from the viewpoint of easily swelling following the central portion 24 of the pipe member 2.
- the inner diameter D5 of the intermediate diameter portion 54 is larger than 3 mm and smaller than 14 mm, preferably larger than 3.5 mm and smaller than 13 mm, and more preferably larger than 4 mm and 12 mm. It may be smaller.
- the length L3 of the intermediate diameter portion 54 may be shorter than the insertion length L4 of the sensor connecting member 5 with respect to the pipe member 2.
- the insertion length L4 of the sensor connecting member 5 with respect to the tube member 2 is the length of the insertion surface 51 in the extending direction B.
- the length L3 of the intermediate diameter portion 54 in the extending direction B may be longer than the wall thickness T3 of the intermediate diameter portion 54.
- the wall thickness T3 of the intermediate diameter portion 54 is not particularly limited.
- the range of the wall thickness T3 of the intermediate diameter portion 54 may be the same as the range of the wall thickness T1 of the intermediate diameter portion 45 of the pipe connecting member 4.
- the wall thickness T3 of the intermediate diameter portion 54 may be the same as or different from the wall thickness T1 of the intermediate diameter portion 45 of the pipe connecting member 4.
- the tapered diameter portion 56 is connected to the intermediate diameter portion 54 and the small diameter portion 55.
- the inner diameter of the tapered diameter portion 56 becomes smaller from the intermediate diameter portion 54 side (inner tip 5a side) to the smaller diameter portion 55 side (outer tip 5b side).
- the inner peripheral surface of the tapered diameter portion 56 may extend linearly from the intermediate diameter portion 54 to the small diameter portion 55, and the intermediate diameter portion may be formed. It may extend from 54 to the small diameter portion 55 in a curved shape, or may bend and extend from the intermediate diameter portion 54 to the small diameter portion 55.
- the angle ⁇ 2 formed by the inner peripheral surface of the tapered diameter portion 56 in the reference cross section including the central axis A is not particularly limited.
- the range of the angle ⁇ 2 formed by the inner peripheral surface of the tapered diameter portion 56 may be the same as the range of the angle ⁇ 1 formed by the inner peripheral surface of the tapered diameter portion 47 of the pipe connecting member 4.
- the angle ⁇ 2 formed by the inner peripheral surface of the tapered diameter portion 56 may be the same as or different from the angle ⁇ 1 formed by the inner peripheral surface of the tapered diameter portion 47 of the pipe connecting member 4.
- the angle ⁇ 2 formed by the inner peripheral surface of the tapered diameter portion 56 in the reference cross section including the central axis A is set. This is the angle formed by the virtual line connecting the tip of the inner peripheral surface of the tapered diameter portion 56 on the intermediate diameter portion 54 side and the tip of the small diameter portion 55 side.
- a fuel pressure sensor is connected to the sensor connection unit 57.
- the fuel pressure sensor detects the pressure of the fuel stored in the storage space 21 via the small diameter portion 55.
- the inner peripheral surface of the sensor connection portion 57 has a female screw surface 57a into which the fuel pressure sensor is screwed, and a sensor contact surface 57b with which the fuel pressure sensor screwed into the female screw surface 57a is abutted. ..
- the female thread surface 57a forms a female thread for screwing the fuel pressure sensor.
- the female screw surface 57a extends from the outer tip 5b toward the inner tip 5a along the extending direction B.
- a tapered surface or the like may be formed between the female screw surface 57a and the outer tip 5b to facilitate screwing of the fuel pressure sensor.
- the sensor contact surface 57b is adjacent to the small diameter portion 55.
- the sensor contact surface 57b is formed in a tapered shape in which the inner diameter decreases from the outer tip 5b side to the inner tip 5a side according to the shape of the fuel pressure sensor.
- the fuel distribution pipe 101 of Comparative Example 1 shown in FIG. 5 includes a pipe member 102 similar to the pipe member 2, a pipe connection member 104 corresponding to the pipe connection member 4, and a sensor connection member 105 corresponding to the sensor connection member 5.
- the pipe connecting member 104 has a small diameter portion 146 having the same inner diameter as the small diameter portion 46, instead of the intermediate diameter portion 45, the small diameter portion 46, and the tapered diameter portion 47 of the pipe connecting member 4.
- the sensor connecting member 105 has a small diameter portion 155 having the same inner diameter as the small diameter portion 55, instead of the intermediate diameter portion 54, the small diameter portion 55, and the tapered diameter portion 56 of the sensor connecting member 5.
- the pipe connecting member 4 inserted and joined to the tip portion 22 of the pipe member 2 has an intermediate diameter portion 45 and an intermediate diameter portion adjacent to the storage space 21. It has a small diameter portion 46 arranged on the opposite side of the storage space 21 from the 45, and the intermediate diameter portion 45 has an inner diameter D3 smaller than the inner diameter D1 of the pipe member 2 and larger than the inner diameter D2 of the small diameter portion 46. That is, in the pipe connecting member 4, the rigidity of the intermediate diameter portion 45 adjacent to the storage space 21 is lower than the rigidity of the small diameter portion 46.
- the intermediate diameter portion 45 of the pipe connecting member 4 also tends to swell following the central portion 24 forming the storage space 21 of the pipe member 2. As a result, the stress generated at the boundary portion 27 between the central portion 24 and the tip portion 22 of the pipe member 2 is suppressed.
- the sensor connecting member 5 inserted and joined to the tip portion 23 of the pipe member 2 is arranged on the opposite side of the storage space 21 from the intermediate diameter portion 54 adjacent to the storage space 21 and the intermediate diameter portion 54. It has a small diameter portion 55, and the intermediate diameter portion 54 has an inner diameter D5 that is smaller than the inner diameter D1 of the pipe member 2 and larger than the inner diameter D4 of the small diameter portion 55.
- the rigidity of the intermediate diameter portion 54 adjacent to the storage space 21 is lower than the rigidity of the small diameter portion 55. Therefore, when the pressure of the fuel is received, the intermediate diameter portion 54 of the sensor connecting member 5 also tends to swell following the central portion 24 forming the storage space 21 of the pipe member 2. As a result, the stress generated at the boundary portion 28 between the central portion 24 and the tip portion 23 of the pipe member 2 is suppressed.
- the cross section orthogonal to the central axis A of the pipe member 2 of the storage space 21 is substantially the same in the entire area in the extending direction B of the pipe member 2, so that the pipe member is affected by the pressure of the fuel.
- 2 When 2 is inflated, it is possible to suppress the occurrence of stress concentration locally.
- the tapered diameter portion 47 which is connected to the intermediate diameter portion 45 and the small diameter portion 46 and has an inner diameter that decreases from the intermediate diameter portion 45 side to the small diameter portion 46 side in the pipe connection member 4.
- the intermediate diameter portion 45 can be made easier to swell by following the central portion 24 forming the storage space 21 of the pipe member 2.
- the sensor connecting member 5 is formed with a tapered diameter portion 56 that is connected to the intermediate diameter portion 54 and the small diameter portion 55 and has an inner diameter that decreases from the intermediate diameter portion 54 side toward the small diameter portion 55 side.
- the intermediate diameter portion 54 can be made easier to swell by following the central portion 24 forming the storage space 21 of the pipe member 2. As a result, the stress generated at the boundary portion 28 between the central portion 24 and the tip portion 23 of the pipe member 2 is further suppressed.
- the angle ⁇ 1 and the angle ⁇ 2 formed by the inner peripheral surfaces of the tapered diameter portion 47 and the tapered diameter portion 56 in the reference cross section including the central axis A of the pipe member 2 are 110 ° or more and 160 ° or less. This makes it possible to prevent the pipe connecting member 4 and the sensor connecting member 5 from becoming too long, and appropriately inflate the intermediate diameter portion 45 of the piping connecting member 4 and the intermediate diameter portion 54 of the sensor connecting member 5. Can be done.
- the pipe connecting member 4 and the sensor connecting member 5 are joined to the pipe member 2 in a state of being inserted into the tip portion 22 and the tip portion 23 of the pipe member 2.
- the connecting member 4 and the sensor connecting member 5 can be firmly joined.
- the length L1 of the intermediate diameter portion 45 in the extending direction B of the pipe member 2 is shorter than the insertion length L2 of the pipe connection member 4 with respect to the pipe member 2, and the thickness of the intermediate diameter portion 45 is reduced.
- the thickness T1 By making the thickness T1 longer, it is possible to prevent the pipe connecting member 4 from becoming too long, and it is possible to appropriately inflate the intermediate diameter portion 45 of the pipe connecting member 4.
- the length L3 of the intermediate diameter portion 54 is shorter than the insertion length L4 of the sensor connecting member 5 with respect to the pipe member 2, and is longer than the wall thickness T3 of the intermediate diameter portion 54. Therefore, it is possible to prevent the sensor connecting member 5 from becoming too long, and it is possible to appropriately inflate the intermediate diameter portion 54 of the sensor connecting member 5.
- the wall thickness T1 of the intermediate diameter portion 45 is 0.3 times or more and 1.5 times or less, preferably 0.7 times or more and 1.3 times or less the wall thickness T2 of the pipe member 2. Further preferably, the intermediate diameter portion 45 is 0.9 times or more and 1.1 times or less, so that the intermediate diameter portion 45 is sufficiently secured with the rigidity of the intermediate diameter portion 45, and the central portion 24 forming the storage space 21 of the pipe member 2 is formed. It can be made easier to swell by following.
- the wall thickness T3 of the intermediate diameter portion 54 is 0.3 times or more and 1.5 times or less, preferably 0.7 times or more and 1.3 times or less, more preferably 0.9 times the wall thickness T2 of the pipe member 2. By doubling or more and 1.1 times or less, the intermediate diameter portion 54 further swells following the central portion 24 forming the storage space 21 of the pipe member 2 while sufficiently ensuring the rigidity of the intermediate diameter portion 54. Can be made easier.
- the pipe connection member 4 since the pipe connection member 4 has the intermediate diameter portion 45, the fuel supplied from the fuel pipe can be appropriately supplied to the storage space for a long period of time. Similarly, since the sensor connecting member 5 has the intermediate diameter portion 54, the pressure of the fuel stored in the storage space 21 can be appropriately transmitted to the fuel pressure sensor for a long period of time.
- the inner diameter D2 of the small diameter portion 46 is 1 mm or more and 11 mm or less, preferably 2 mm or more and 10 mm or less, and more preferably 3 mm or more and 9 mm or less, so that the fuel supplied from the fuel pipe can be appropriately stored. While supplying to the space 21, it is possible to suppress the fuel distribution pipe 1 from becoming too large, and it is possible to suppress the passage of fuel from being obstructed.
- the inner diameter D4 of the small diameter portion 55 is 3 mm or more and 9 mm or less, preferably 3.5 mm or more and 7 mm or less, and more preferably 4 mm or more and 5 mm or less, the pressure of the fuel stored in the storage space 21 is appropriately applied. While transmitting to the fuel pressure sensor, it is possible to suppress the fuel distribution pipe 1 from becoming too large and to prevent the passage of fuel from being obstructed.
- the second embodiment is basically the same as the first embodiment, in which the sensor connecting member is joined on the peripheral surface of the pipe member, and the lid member is joined to the tip of the pipe member instead of the sensor connecting member. It differs from the first embodiment only in that it is. Therefore, in the following description, only the matters different from those of the first embodiment will be described, and the same description as that of the first embodiment will be omitted.
- FIG. 6 is a schematic perspective view of the fuel distribution pipe according to the second embodiment.
- FIG. 7 is a schematic cross-sectional view showing a part of the fuel distribution pipe shown in FIG.
- the fuel distribution pipe 1A according to the present embodiment includes a pipe member 2, a plurality of housings 3, a pipe connecting member 4, a sensor connecting member 5A, and a lid member 6. Be prepared.
- the sensor connecting member 5A is a connecting member connected to a fuel pressure sensor (not shown) that detects the pressure of the fuel stored in the storage space 21, similar to the sensor connecting member 5 of the first embodiment.
- the sensor connecting member 5A is joined on the peripheral surface of the pipe member 2.
- the sensor connecting member 5A can be joined to the peripheral surface of the pipe member 2 by brazing, welding, or the like.
- the lid member 6 is inserted and joined to the tip portion 23 on the other side (right side in FIGS. 6 and 7) of the tube member 2 instead of the sensor connecting member 5 of the first embodiment. Therefore, the storage space 21 is formed by the central portion 24 of the pipe member 2, in which the pipe connecting member 4 and the lid member 6 are not inserted and joined.
- FIG. 8 is an enlarged schematic cross-sectional view of the periphery of the lid member in FIG. 7.
- the lid member 6 is a connecting member that closes the other side of the pipe member 2.
- the lid member 6 is formed in a cap shape centered on the central axis A of the pipe member 2.
- the tip on one side of the lid member 6 in the extending direction B (the tip on the left side in FIGS. 6 to 8) is referred to as the inner tip 6a, and the tip on the other side of the lid member 6 in the extending direction B (FIGS. 6 to 8).
- the tip on the right side of the above) is called the outer tip 6b.
- the lid member 6 is inserted and joined to the tip portion 23 of the pipe member 2.
- the lid member 6 can be joined to the tip portion 23 of the pipe member 2 by brazing, welding, or the like. In the present embodiment, the lid member 6 is joined to the pipe member 2 by brazing.
- the outer peripheral surface of the lid member 6 has an insertion surface 61 and a contact surface 62.
- the insertion surface 61 extends in a columnar shape from the inner tip 6a toward the outer tip 6b along the extending direction B.
- the contact surface 62 rises from the insertion surface 61 toward the radial outer side of the lid member 6 on the outer tip 6b side of the insertion surface 61. Then, in a state where the insertion surface 61 is inserted into the tip portion 23 of the pipe member 2 and the contact surface 62 is in contact with the tip surface 26 of the tip portion 23 of the pipe member 2, the insertion surface 61 is the tip of the pipe member 2. It is brazed to the part 23.
- the contact surface 62 of the lid member 6 may also be brazed to the tip surface 26 of the pipe member 2. Further, a tapered surface or the like may be formed between the insertion surface 61 and the inner tip 4b to facilitate the insertion of the lid member 6 into the tip 23 of the tube member 2.
- the outer diameter of the insertion surface 61 before being inserted into the tip portion 23 of the pipe member 2 may be larger than the inner diameter of the pipe member 2.
- the insertion surface 61 is inserted into the tip portion 23 of the pipe member 2 and brazed, so that the insertion surface 61 is brazed in a state of being press-fitted into the tip portion 23 of the pipe member 2.
- the insertion surface 61 may have irregularities formed by knurling or the like, the maximum outer diameter of the convex may be larger than the inner diameter of the pipe member 2, and the minimum outer diameter of the concave may be smaller than the inner diameter of the pipe member 2. ..
- the convex portion is pressed against the tip portion 23 of the pipe member 2, and the brazing material enters the concave portion, so that the bonding strength of the insertion surface 61 with respect to the tip portion 23 of the pipe member 2 can be increased.
- the lid member 6 is formed with a recess 63 adjacent to the storage space 21 and recessed from the inner tip 6a toward the outer tip 6b.
- the lid member 6 has a perforated portion 64, a tapered diameter portion 65, and a closing portion 66.
- the perforated portion 64 is a part of the lid member 6 in which the recess 63 is formed adjacent to the storage space 21.
- the tapered diameter portion 65 is a part of the lid member 6 in which the recess 63 is formed adjacent to the opposite side of the storage space 21 of the perforated portion 64.
- the closed portion 66 is a part of the lid member 6 in which the recess 63 is not formed adjacent to the opposite side of the storage space 21 of the tapered diameter portion 65.
- the perforated portion 64 and at least a part of the tapered diameter portion 65 form an insertion surface 61. That is, the insertion surface 61 is formed by the outer peripheral surface of the perforated portion 64 and the outer peripheral surface of at least a part of the tapered diameter portion 65.
- At least a part of the closed portion 66 may form the insertion surface 61.
- the insertion surface 61 is formed by an outer peripheral surface of the perforated portion 64, an outer peripheral surface of the tapered diameter portion 65, and an outer peripheral surface of at least a part of the closed portion 66.
- the recess 63 makes the perforated portion 64 adjacent to the storage space 21 and the tapered diameter portion 65 adjacent to the perforated portion 64 less rigid than the rigidity of the closed portion 66. Therefore, when the pressure of the fuel is received, the central portion 24 of the pipe member 2 swells, and the perforated portion 64 of the lid member 6 also tends to swell following the central portion 24 of the pipe member 2.
- the inner diameter D6 of the perforated portion 64 is smaller than the inner diameter D1 of the pipe member 2.
- the inner diameter D6 of the perforated portion 64 is not particularly limited as long as the above conditions are satisfied.
- the inner diameter D6 of the perforated portion 64 may be larger than 3 mm, preferably larger than 3.5 mm, and further preferably larger than 4 mm.
- the inner diameter D6 of the perforated portion 64 may be smaller than 14 mm, preferably smaller than 13 mm, and further preferably smaller than 12 mm from the viewpoint of easily swelling following the central portion 24 of the pipe member 2.
- the inner diameter D6 of the perforated portion 64 is larger than 3 mm and smaller than 14 mm, preferably larger than 3.5 mm and smaller than 13 mm, and more preferably larger than 4 mm and 12 mm. It may be smaller.
- the length L5 of the perforated portion 64 may be shorter than the insertion length L6 of the lid member 6 with respect to the pipe member 2.
- the insertion length L6 of the lid member 6 with respect to the pipe member 2 is the length of the insertion surface 61 in the extending direction B.
- the length L5 of the perforated portion 64 in the extending direction B may be longer than the wall thickness T4 of the perforated portion 64.
- the wall thickness T4 of the perforated portion 64 is not particularly limited.
- the range of the wall thickness T4 of the perforated portion 64 may be the same as the range of the wall thickness T1 of the intermediate diameter portion 45 of the pipe connecting member 4.
- the wall thickness T4 of the perforated portion 64 may be the same as or different from the wall thickness T1 of the intermediate diameter portion 45 of the pipe connecting member 4.
- the tapered diameter portion 65 is connected to the perforated portion 64 and the closed portion 66.
- the inner diameter of the tapered diameter portion 65 decreases from the perforated portion 64 side (inner tip 6a side) to the closed portion 66 side (outer tip 6b side).
- the inner peripheral surface of the tapered diameter portion 65 may extend linearly from the perforated portion 64 to the closed portion 66, and the perforated portion may be formed. It may extend from 64 to the closed portion 66 in a curved shape, or may bend and extend from the perforated portion 64 to the closed portion 66.
- the angle ⁇ 3 formed by the inner peripheral surface of the tapered diameter portion 65 in the reference cross section including the central axis A is not particularly limited.
- the range of the angle ⁇ 3 formed by the inner peripheral surface of the tapered diameter portion 65 may be the same as the range of the angle ⁇ 1 formed by the inner peripheral surface of the tapered diameter portion 47 of the pipe connecting member 4.
- the angle ⁇ 3 formed by the inner peripheral surface of the tapered diameter portion 65 may be the same as or different from the angle ⁇ 1 formed by the inner peripheral surface of the tapered diameter portion 47 of the pipe connecting member 4.
- the angle ⁇ 3 formed by the inner peripheral surface of the tapered diameter portion 65 in the reference cross section including the central axis A is set. This is the angle formed by the virtual line connecting the tip of the inner peripheral surface of the tapered diameter portion 32 on the perforated portion 64 side and the tip of the closed portion 66 side.
- the fuel distribution pipe 101A of Comparative Example 2 shown in FIG. 9 includes a pipe member 102 similar to the pipe member 2, a pipe connection member 104 corresponding to the pipe connection member 4, and a lid member 106 corresponding to the lid member 6.
- the pipe connecting member 104 has a small diameter portion 146 having the same inner diameter as the small diameter portion 46, instead of the intermediate diameter portion 45, the small diameter portion 46, and the tapered diameter portion 47 of the pipe connecting member 4.
- the lid member 106 has a closing portion 166 in which the recess 63 of the lid member 6 is not formed, instead of the perforated portion 64, the tapered diameter portion 65, and the closing portion 66 of the lid member 6.
- the pipe connecting member 4 inserted and joined to the tip portion 22 of the pipe member 2 has an intermediate diameter portion 45 and an intermediate diameter portion adjacent to the storage space 21. It has a small diameter portion 46 arranged on the opposite side of the storage space 21 from the 45, and the intermediate diameter portion 45 has an inner diameter D3 smaller than the inner diameter D1 of the pipe member 2 and larger than the inner diameter D2 of the small diameter portion 46. That is, in the pipe connecting member 4, the rigidity of the intermediate diameter portion 45 adjacent to the storage space 21 is lower than the rigidity of the small diameter portion 46.
- the intermediate diameter portion 45 of the pipe connecting member 4 also tends to swell following the central portion 24 forming the storage space 21 of the pipe member 2.
- the stress generated at the boundary portion 27 between the central portion 24 and the tip portion 22 of the pipe member 2 is suppressed.
- the lid member 6 inserted and joined to the tip portion 23 of the pipe member 2 has a perforated portion 64 in which the recess 63 is formed adjacent to the storage space 21. That is, in the lid member 6, the rigidity of the perforated portion 64 adjacent to the storage space 21 is lower than the rigidity of the closed portion 66.
- the perforated portion 64 of the lid member 6 also tends to swell following the central portion 24 forming the storage space 21 of the pipe member 2. As a result, the stress generated at the boundary portion 29 between the central portion 24 and the tip portion 23 of the pipe member 2 is suppressed.
- the tapered diameter portion 65 which is connected to the lid member 6 on the opposite side of the storage space 21 of the perforated portion 64 and has an inner diameter that decreases from the inner tip 6a side to the outer tip 6b side. Is formed, the perforated portion 64 can be made easier to swell by following the central portion 24 forming the storage space 21 of the pipe member 2. As a result, the stress generated at the boundary portion 29 between the central portion 24 and the tip portion 23 of the pipe member 2 is further suppressed.
- connection member may be the pipe connection member and the sensor connection member.
- the sensor connecting member is joined on the peripheral surface of the pipe member, the pipe connecting member is joined to the tip portion on one side of the pipe member, and the lid member is joined to the tip portion on the other side of the pipe member.
- the pipe connecting member is joined on the peripheral surface of the pipe member, the sensor connecting member is joined to the tip of one side of the pipe member, and the lid member is joined to the tip of the other side of the pipe member. May be joined.
- connection member such as a pipe connection member and a sensor connection member is joined on the peripheral surface of the pipe member, and a lid member is joined to the tip portion on one side and the tip portion on the other side of the pipe member. May be good.
- One aspect of the present invention can be used as a fuel distribution pipe that distributes and supplies fuel to a plurality of fuel injection devices.
- Insertion surface, 52 ... Contact surface, 53 ... Through hole, 54 ... Intermediate diameter part, 55 ... Small diameter part, 56 ... Tapered diameter part, 57 ... Sensor connection part, 57a ... Female thread surface, 57b ... Sensor contact surface, 6 ... Lid member, 6a ... Inner tip, 6b ... Outer tip, 61 ... Insertion surface, 62 ... Contact surface, 63 ... Recess, 64 ... Perforated part, 65 ... Tapered diameter part, 66 ... Closure part, 101 ... Fuel distribution pipe, 101A ... Fuel distribution pipe, 102 ... pipe member, 104 ... pipe connection member, 105 ... sensor connection member, 106 ... lid member, 121 ... storage space, 122 ...
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
図1は第一実施形態に係る燃料分配管の概略斜視図である。図2は、図1に示す燃料分配管の一部を示す概略断面図である。図1及び図2に示すように、本実施形態に係る燃料分配管1は、高圧ポンプ(不図示)により圧縮されて燃料配管(不図示)から供給された高圧の燃料を、エンジン(不図示)の各気筒(不図示)に対応して設けられる燃料噴射装置(不図示)に分配供給するものである。燃料分配管1は、フューエルインジェクションレール、フューエルデリバリパイプ、コモンレール等とも呼ばれる。
次に、第二実施形態について説明する。第二実施形態は、基本的に第一実施形態と同様であり、センサ接続部材が管部材の周面上に接合され、センサ接続部材の代わりに蓋部材が管部材の先端部に接合されている点のみ第一実施形態と相違する。このため、以下の説明では、第一実施形態と相違する事項のみを説明し、第一実施形態と同様の説明を省略する。
Claims (10)
- 燃料配管から供給された燃料を複数の燃料噴射装置に分配供給する燃料分配管であって、
内部に前記燃料を貯留する貯留空間を形成する管部材と、
前記管部材の先端部に挿入及び接合されて、前記貯留空間に接続される貫通孔が形成された接続部材と、を備え、
前記接続部材は、前記貯留空間に隣接された中間径部と、前記中間径部よりも前記貯留空間の反対側に配置された小径部と、を有し、
前記中間径部は、前記小径部の内径よりも大きく前記管部材の内径よりも小さい内径を有する、
燃料分配管。 - 前記貯留空間の前記管部材の中心軸線と直交する断面は、前記管部材の延在方向における全域において略同じである、
請求項1に記載の燃料分配管。 - 前記接続部材は、前記中間径部と前記小径部とに接続されて前記中間径部側から前記小径部側に向かうに従い小さくなる内径を有するテーパ径部を更に有する、
請求項1又は2に記載の燃料分配管。 - 前記管部材の中心軸線を含む基準断面における前記テーパ径部の内周面のなす角度は、110°以上160°以下である、
請求項3に記載の燃料分配管。 - 前記管部材の延在方向において、前記中間径部の長さは、前記管部材に対する前記接続部材の挿入長さよりも短く、前記中間径部の肉厚よりも長い、
請求項1~4の何れか一項に記載の燃料分配管。 - 前記中間径部の肉厚は、前記管部材の肉厚の0.3倍以上1.5倍以下である、
請求項1~5の何れか一項に記載の燃料分配管。 - 前記接続部材は、前記燃料配管と接続される配管接続部材である、
請求項1~6の何れか一項に記載の燃料分配管。 - 前記小径部の前記内径は、1mm以上11mm以下である、
請求項7に記載の燃料分配管。 - 前記接続部材は、前記貯留空間に貯留されている前記燃料の圧力を検出する燃料圧力センサに接続されるセンサ接続部材である、
請求項1~6の何れか一項に記載の燃料分配管。 - 前記小径部の前記内径は、3mm以上9mm以下である、
請求項9に記載の燃料分配管。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MX2023005921A MX2023005921A (es) | 2020-11-27 | 2021-11-11 | Tubo de distribucion de combustible. |
CN202180078736.9A CN116472403A (zh) | 2020-11-27 | 2021-11-11 | 燃料分配管 |
US18/038,394 US11988181B2 (en) | 2020-11-27 | 2021-11-11 | Fuel distribution pipe |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020-196883 | 2020-11-27 | ||
JP2020196883A JP2022085276A (ja) | 2020-11-27 | 2020-11-27 | 燃料分配管 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022113749A1 true WO2022113749A1 (ja) | 2022-06-02 |
Family
ID=81755913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/041507 WO2022113749A1 (ja) | 2020-11-27 | 2021-11-11 | 燃料分配管 |
Country Status (5)
Country | Link |
---|---|
US (1) | US11988181B2 (ja) |
JP (1) | JP2022085276A (ja) |
CN (1) | CN116472403A (ja) |
MX (1) | MX2023005921A (ja) |
WO (1) | WO2022113749A1 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009524761A (ja) * | 2006-01-26 | 2009-07-02 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | 分配装置ブロックを組み込まれた高圧アキュムレータ装置 |
JP2018031271A (ja) * | 2016-08-23 | 2018-03-01 | 臼井国際産業株式会社 | ガソリン直噴レール |
EP3636912A1 (en) * | 2018-10-08 | 2020-04-15 | Continental Automotive GmbH | Fuel rail for a fuel injection system for an internal combustion engine and method for manufacturing a fuel rail |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012097690A (ja) | 2010-11-04 | 2012-05-24 | Otics Corp | フューエルデリバリパイプ |
US20140041635A1 (en) * | 2012-08-09 | 2014-02-13 | GM Global Technology Operations LLC | Fuel rail connector |
JP6744089B2 (ja) | 2015-12-04 | 2020-08-19 | 臼井国際産業株式会社 | ガソリン直噴レール |
-
2020
- 2020-11-27 JP JP2020196883A patent/JP2022085276A/ja active Pending
-
2021
- 2021-11-11 US US18/038,394 patent/US11988181B2/en active Active
- 2021-11-11 MX MX2023005921A patent/MX2023005921A/es unknown
- 2021-11-11 CN CN202180078736.9A patent/CN116472403A/zh active Pending
- 2021-11-11 WO PCT/JP2021/041507 patent/WO2022113749A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009524761A (ja) * | 2006-01-26 | 2009-07-02 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | 分配装置ブロックを組み込まれた高圧アキュムレータ装置 |
JP2018031271A (ja) * | 2016-08-23 | 2018-03-01 | 臼井国際産業株式会社 | ガソリン直噴レール |
EP3636912A1 (en) * | 2018-10-08 | 2020-04-15 | Continental Automotive GmbH | Fuel rail for a fuel injection system for an internal combustion engine and method for manufacturing a fuel rail |
Also Published As
Publication number | Publication date |
---|---|
US11988181B2 (en) | 2024-05-21 |
MX2023005921A (es) | 2023-05-29 |
US20230417208A1 (en) | 2023-12-28 |
CN116472403A (zh) | 2023-07-21 |
JP2022085276A (ja) | 2022-06-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6929288B2 (en) | Connecting structure of branch connector in fuel pressure accumulating container | |
WO2013129062A1 (ja) | 直噴式エンジン用高圧燃料配管の端末構造 | |
JP2004211637A (ja) | 高圧燃料蓄圧器 | |
JP6221951B2 (ja) | 配管接続構造 | |
US20040080156A1 (en) | Common rail for diesel engines | |
WO2018037702A1 (ja) | ガソリン直噴レール | |
US20180094614A1 (en) | Fuel pipe connecting head and fuel pipe | |
WO2022113749A1 (ja) | 燃料分配管 | |
JP4046334B2 (ja) | コモンレール用分岐接続体の接続構造 | |
JP2010216431A (ja) | コモンレール | |
KR20170024091A (ko) | 가솔린 직분사 엔진용 연료 레일의 단말 시일 구조 | |
JP3768043B2 (ja) | コモンレール用分岐接続体の接続構造 | |
CN109154263B (zh) | 燃料分配装置 | |
JP4775647B2 (ja) | コモンレールおよびコモンレール用のブッシュの製造方法 | |
JP4533298B2 (ja) | フューエルデリバリパイプ | |
US20120228866A1 (en) | Fuel delivery pipe | |
US20040226540A1 (en) | High pressure reservoir for fuel injection of internal combustion engines with a high-pressure fuel pump | |
JP2019173587A (ja) | 流体ポンプ | |
JP2003056427A (ja) | 燃料高圧蓄圧器 | |
JP2003139013A (ja) | インジェクター本体 | |
US11143152B2 (en) | Fuel pipe | |
JPH10246378A (ja) | コモンレール | |
JP3656283B2 (ja) | 高圧燃料レールにおける分岐接続体の接続構造 | |
JP3694228B2 (ja) | デリバリパイプ | |
JP6962208B2 (ja) | 密封構造 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21897723 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202180078736.9 Country of ref document: CN Ref document number: 18038394 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 21897723 Country of ref document: EP Kind code of ref document: A1 |