WO2015093163A1 - 燃料分配供給装置 - Google Patents
燃料分配供給装置 Download PDFInfo
- Publication number
- WO2015093163A1 WO2015093163A1 PCT/JP2014/079126 JP2014079126W WO2015093163A1 WO 2015093163 A1 WO2015093163 A1 WO 2015093163A1 JP 2014079126 W JP2014079126 W JP 2014079126W WO 2015093163 A1 WO2015093163 A1 WO 2015093163A1
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- WO
- WIPO (PCT)
- Prior art keywords
- cup
- cup body
- seal
- fuel
- seal part
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
- F02M55/005—Joints; Sealings for high pressure conduits, e.g. connected to pump outlet or to injector inlet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
- F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
- F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
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- 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
- F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
Definitions
- the present invention relates to a fuel distribution and supply device that distributes and supplies fuel to a plurality of fuel injection devices.
- Patent Document 1 describes a fuel distribution and supply device that supplies high-pressure fuel to each fuel injection device that injects fuel into each cylinder of a direct injection engine.
- the fuel distribution and supply device includes a high-pressure fuel storage part (described as a fuel main supply pipe part in Patent Document 1) that extends linearly and stores fuel in a high-pressure state, and a high-pressure fuel stored in the high-pressure fuel storage part. And a plurality of cup portions that are supplied to each fuel injection device.
- Each cup part is composed of one component, and the inner peripheral surface of each cup part is an airtight holding surface for holding each fuel injection device in an airtight manner.
- the airtight holding surface is required to have high accuracy with respect to dimensions such as hole diameter, roughness, and roundness in order to maintain airtightness with the fuel injection device.
- the fuel pressure is set high, higher accuracy is required for the dimension of the airtight holding surface.
- the cup part is produced by cutting with high processing accuracy.
- the cutting process has a problem that the machining accuracy is high but the cost is high.
- an object of the present invention is to provide a fuel distribution and supply device that achieves cost reduction while maintaining airtightness with the fuel injection device.
- a fuel distribution and supply device holds a high-pressure fuel storage unit that stores fuel in a high-pressure state and each fuel injection device in an airtight manner, A plurality of cup portions that supply fuel stored in the high-pressure fuel storage portion to each fuel injection device, and the cup portion includes a seal portion formed with an airtight holding surface for holding each fuel injection device in an airtight manner
- a cup body that is joined to the high-pressure fuel storage part and has a seal part insertion hole into which the seal part is inserted, and the seal part and the cup body are formed by separate members and joined.
- an airtight holding surface for holding the fuel injection device in an airtight manner is formed in the seal portion, and this seal portion is a separate member from the cup body. And the seal part and the cup main body are joined in the state where the seal part was inserted in the seal part insertion hole of the cup main body. For this reason, the seal part and cup main body which comprise a cup part can be produced with another processing method.
- the cup portion is required to have high dimensional accuracy for the airtight holding surface, but the surface other than the airtight holding surface is not required to be as accurate as the airtight holding surface.
- the seal portion can be manufactured by a processing method that provides high dimensional accuracy such as cutting, and the cup body can be manufactured by a low cost processing method such as casting. Thereby, cost reduction can be achieved, maintaining the airtightness between a cup part and a fuel-injection apparatus.
- the seal portion may cover the seal portion insertion hole of the cup body.
- the seal portion covers the seal portion insertion hole of the cup body, so that the airtightness with the fuel injection device can be maintained without being influenced by the state of the cup body. For example, when a cup body is produced by casting, even if a casting hole is formed in the cup body, the casting hole is covered with the seal portion, so that fuel leakage due to the influence of the casting hole can be prevented.
- the seal part and the cup body may be made of different materials.
- the seal portion maintains airtightness with the fuel injection device, and the cup body holds the seal portion. For this reason, the performance required for the seal portion and the cup body is different. Therefore, by making the seal part and cup body different materials in this way, the seal part is made of a material having the optimum characteristics required for the seal part, and the cup body is the optimum characteristic required for the cup body. It can produce with the material which has. Thereby, the function improvement of a seal part and a cup main part can be aimed at.
- At least one of the seal part and the cup body may be made of resin.
- the weight reduction and cost reduction of a cup part can be achieved by making at least one of a seal part and a cup main body into resin.
- one of the seal part and the cup body is made of resin, and the other is made of metal, and the seal part and the cup body may be joined by insert molding.
- one of the seal part and the cup body is made of resin, and the other is made of metal.
- strength can be ensured, aiming at the weight reduction and cost reduction of a cup part.
- the positional accuracy of the seal portion with respect to a predetermined reference position in the fuel distribution and supply device can be managed by resin injection molding. For this reason, the position shift of the seal part with respect to the predetermined reference position in the fuel distribution and supply device can be suppressed.
- the seal portion may be made of resin.
- the dimensional accuracy of an airtight holding surface can be made high by making a seal part into resin.
- the thermal expansion coefficient of the seal portion may be larger than the thermal expansion coefficient of the cup body.
- the coefficient of thermal expansion of the seal part may be made larger than the coefficient of thermal expansion of the cup body.
- the seal part and the cup body are made of metal, the seal part and the cup body are joined by brazing, and a cut for installing a brazing material on the outer peripheral surface of the seal part.
- a notch may be formed.
- the joining strength between the seal part and the cup body can be increased by joining the seal part and the cup body by brazing.
- by forming a notch for installing the brazing material on the outer peripheral surface of the seal portion it becomes easier to install the brazing material in the seal portion, and it is possible to suppress the brazing material from flowing out to the airtight holding surface. .
- FIG. 1 is a perspective view of a fuel supply system including a fuel distribution and supply device according to an embodiment. It is a perspective view of the fuel distribution supply device concerning an embodiment. It is a perspective view of a cup part. It is a perspective view of a cup part.
- FIG. 5 is a sectional view taken along line VV shown in FIG. 3.
- 4A and 4B are views showing a seal portion, where FIG. 5A is a perspective view, and FIG. 5B is a cross-sectional view taken along line VI (b) -VI (b) shown in FIG. It is a figure which shows a cup main body, (a) is a perspective view, (b) is sectional drawing in the VII (b) -VII (b) line
- FIG. 1 is a perspective view of a fuel supply system including a fuel distribution and supply device according to an embodiment.
- the fuel distribution and supply device 1 according to this embodiment is configured to inject a plurality of fuels that are pumped from a fuel pump 2 through a joint pipe 3 into a plurality of cylinders of an engine (not shown).
- the fuel injection device 4 is distributed and supplied.
- a fuel distribution and supply apparatus 1 shown in FIG. 1 distributes and supplies fuel to four fuel injection apparatuses 4 mounted on each cylinder of a four-cylinder engine.
- the number of fuel injection devices 4 that distribute and supply fuel is not limited, and is appropriately selected depending on the type of engine.
- the fuel distribution and supply device 1 is also called a fuel injection rail.
- FIG. 2 is a perspective view of the fuel distribution and supply apparatus according to the embodiment.
- the fuel distribution and supply device 1 mainly includes a high-pressure fuel storage unit 5 and a plurality of cup units 6.
- the high-pressure fuel storage unit 5 stores fuel pumped from the fuel pump 2 in a high-pressure state in order to supply fuel to the plurality of fuel injection devices 4.
- the high-pressure fuel reservoir 5 is formed in a circular tube extending linearly along the cylinder row direction (crankshaft direction) of the engine.
- the tube shape of the high-pressure fuel storage unit 5 is not necessarily a circular tube extending linearly, and can be various shapes.
- An internal space (not shown) communicating with the joint pipe 3 is formed inside the high-pressure fuel reservoir 5. This internal space is a space for storing fuel pumped from the joint pipe 3 in a high pressure state.
- the material of the high-pressure fuel storage unit 5 is not particularly limited, and can be, for example, metal or resin.
- the method for producing the high-pressure fuel reservoir 5 is not particularly limited.
- the high-pressure fuel reservoir 5 is made of metal, hot forging or the like is used.
- the high-pressure fuel reservoir 5 is made of resin, injection molding is performed. Can be produced.
- the high-pressure fuel storage unit 5 temporarily stores the fuel pumped from the fuel pump 2, thereby suppressing the pulsation of the fuel pump 2 from being transmitted to the fuel injection device 4.
- FIG. 5 is a cross-sectional view taken along line VV shown in FIG.
- a joint surface 7 to be joined to the high pressure fuel storage unit 5 is formed on the surface of the cup unit 6 on the high pressure fuel storage unit 5 side.
- the joining surface 7 has a concave curved surface shape corresponding to the outer shape of the high-pressure fuel reservoir 5 so as to be in close contact with the high-pressure fuel reservoir 5.
- the tip surface 8 of the cup 6 opposite to the high-pressure fuel reservoir 5 is formed in a flat shape.
- the cup portion 6 is formed with a fuel injection device insertion hole 9 that is in communication with the internal space of the high-pressure fuel storage portion 5 and into which the fuel injection device 4 is inserted.
- the fuel injection device insertion hole 9 is described as a through hole that linearly penetrates between the joint surface 7 and the tip surface 8.
- the fuel injection device insertion hole 9 may not penetrate through the cup portion 6 as long as it communicates with the internal space of the high-pressure fuel storage portion 5 through a horizontal hole or the like.
- the fuel injection device insertion hole 9 is a hole extending linearly.
- a central axis L of the fuel injection device insertion hole 9 extends in a direction perpendicular to the distal end surface 8.
- An airtight holding surface 10 for holding the fuel injection device 4 in an airtight manner is formed on the inner peripheral surface of the fuel injection device insertion hole 9.
- the airtight holding surface 10 is in contact with the fuel injection device 4 or a sealing material such as an O-ring fitted into the fuel injection device 4. Thereby, the airtightness between the airtight holding surface 10 and the fuel injection device 4 is maintained. For this reason, the airtight holding surface 10 is formed with high accuracy in dimensions such as hole diameter, roughness, and roundness.
- the cup 6 is stored in the high-pressure fuel reservoir 5 by holding the fuel injector 4 in an airtight manner on the airtight holding surface 10 formed on the inner peripheral surface of the fuel injector insertion hole 9. Can be supplied to the fuel injection device 4.
- the cup portion 6 is formed with a stay portion 11 for fixing the fuel distribution / supply device 1 to an engine block (not shown).
- the stay portion 11 is formed with a bolt hole 12 through which a bolt (not shown) for fixing the fuel distribution and supply device 1 to the engine block is passed.
- the bolt hole 12 extends in a direction perpendicular to the tip surface 8. That is, the central axis of the bolt hole 12 and the central axis L of the fuel injection device insertion hole 9 are parallel to each other.
- the stay portion 11 is described as being integral with the cup portion 6. However, the stay portion 11 may be separate from the cup portion 6.
- cup part 6 comprised in this way is mainly comprised by the seal part 13 and the cup main body 14.
- FIG. 6 (a) is a perspective view of the seal portion
- FIG. 6 (b) is a sectional view taken along line VI (b) -VI (b) shown in FIG. 6 (a).
- the seal portion 13 is a constituent member of the cup portion 6, and the airtight holding surface 10 of the cup portion 6 is formed.
- the seal portion 13 is a separate member from the cup body 14.
- the seal portion 13 is formed in a deformed cylindrical shape.
- the seal portion 13 extends from the joint surface 7 to the distal end surface 8, and a fuel injection device insertion hole 9 for the cup portion 6 is formed on the inner peripheral surface of the seal portion 13. That is, the fuel injection device insertion hole 9 of the cup portion 6 is formed only in the seal portion 13.
- the seal portion 13 includes a small diameter portion 15 disposed on the joining surface 7 side, a large diameter portion 16 disposed on the distal end surface 8 side, and the small diameter portion 15 and the large diameter portion 16. And an enlarged diameter portion 17 to be arranged.
- the small diameter portion 15, the large diameter portion 16, and the enlarged diameter portion 17 are formed in a circular cross section centered on the central axis L of the fuel injection device insertion hole 9.
- the thickness of the small diameter portion 15 and the thickness of the large diameter portion 16 are substantially the same.
- the large diameter portion 16 has a larger diameter than the small diameter portion 15, and the large diameter portion 17 linearly expands from the small diameter portion 15 to the large diameter portion 16.
- the enlarged diameter portion 17 may be bent in a direction perpendicular to the small diameter portion 15 and the large diameter portion 16 so as to extend in a direction perpendicular to the central axis L of the fuel injection device insertion hole 9.
- the fuel injection device insertion hole 9 is formed by the inner peripheral surfaces of the small diameter portion 15, the large diameter portion 16, and the enlarged diameter portion 17, and the inner peripheral surface of the large diameter portion 16 is the airtight holding surface 10.
- FIG. 7 (a) is a perspective view of the cup body
- FIG. 7 (b) is a cross-sectional view taken along line VII (b) -VII (b) shown in FIG. 7 (a).
- the cup body 14 is a constituent member of the cup portion 6 and is joined to the high-pressure fuel storage portion 5 to hold the seal portion 13.
- the cup body 14 is a separate member from the seal portion 13.
- the cup main body 14 is formed with a seal portion insertion hole 18 that communicates with the internal space of the high-pressure fuel storage portion 5 and into which the seal portion 13 is inserted.
- the seal portion insertion hole 18 is described as a through-hole penetrating the cup body 14.
- the seal portion insertion hole 18 may not penetrate the cup main body 14 as long as it communicates with the internal space of the high-pressure fuel storage portion 5 through a horizontal hole or the like.
- the seal portion insertion hole 18 includes a small-diameter inner peripheral surface 19 disposed on the joining surface 7 side, a large-diameter inner peripheral surface 20 disposed on the distal end surface 8 side, and a small-diameter inner peripheral surface 19. And an enlarged inner peripheral surface 21 disposed between the inner peripheral surface 20 and the large inner peripheral surface 20.
- the small-diameter inner peripheral surface 19, the large-diameter inner peripheral surface 20, and the enlarged-diameter inner peripheral surface 21 are formed in a circular cross section around the central axis L of the fuel injection device insertion hole 9.
- the inner diameters of the small-diameter inner peripheral surface 19, the large-diameter inner peripheral surface 20, and the enlarged-diameter inner peripheral surface 21 are substantially the same as the outer diameters of the small-diameter portion 15, the large-diameter portion 16, and the enlarged-diameter portion 17 of the seal portion 13. It has become. That is, the large-diameter inner peripheral surface 20 has a larger diameter than the small-diameter inner peripheral surface 19, and the enlarged-diameter inner peripheral surface 21 linearly expands from the small-diameter inner peripheral surface 19 to the large-diameter inner peripheral surface 20. ing.
- substantially the same diameter means that the diameters are substantially the same, and includes that the diameter is slightly larger or smaller than the same diameter.
- the lengths of the small-diameter inner peripheral surface 19, the large-diameter inner peripheral surface 20, and the enlarged-diameter inner peripheral surface 21 in the central axis L direction are the centers of the small-diameter portion 15, the large-diameter portion 16, and the enlarged-diameter portion 17 of the seal portion 13. The length is substantially the same as the length in the axis L direction.
- substantially the same length means that it is substantially the same length, and also includes that it is slightly longer or shorter than the same length.
- the seal portion 13 and the cup body 14 may be made of different materials or the same material.
- any material may be adopted as long as the characteristics required for the seal part 13 are obtained.
- a metal such as aluminum or a resin such as polyamide (PA) can be used as the material of the seal portion 13.
- PA polyamide
- the material of the cup body 14 any material may be adopted as long as the characteristics required for the cup body 14 are obtained.
- a metal such as aluminum or a resin such as polyamide (PA) can be employed as the material of the cup body 14. Since the seal portion 13 is inserted into the seal portion insertion hole 18, the material of the seal portion 13 and the cup body 14 is made so that the thermal expansion coefficient of the seal portion 13 is larger than the thermal expansion coefficient of the cup body 14. Can be set.
- the seal part 13 and the cup main body 14 may be manufactured by the same manufacturing method, or manufactured by different manufacturing methods. It may be.
- a method for producing the seal portion 13 any method may be adopted as long as characteristics required for the seal portion 13 and the airtight holding surface 10 are obtained.
- a method for producing the seal portion 13 cutting, hot forging, cold forging, press working, a combination of cutting and pressing, and resin injection molding can be employed.
- a manufacturing method of the cup body 14 any method may be adopted as long as the characteristics required for the cup body 14 are obtained.
- cutting, hot forging, cold forging, pressing, casting, lost wax, metal injection (metal injection molding), and resin injection molding can be employed.
- the cup main body 14 and the seal part 13 are joined to the cup part 6 in a state where the seal part 13 is inserted into the seal part insertion hole 18. That is, the cup portion 6 has a small-diameter inner peripheral surface 19, a large-diameter inner peripheral surface 20, and an enlarged-diameter inner peripheral surface 21 of the cup body 14 on the small-diameter portion 15, the large-diameter portion 16, and the enlarged-diameter portion 17 of the seal portion 13.
- the seal portion 13 and the cup body 14 are joined together with the outer peripheral surface being in close contact. For this reason, the seal portion insertion hole 18 is completely covered by the seal portion 13.
- the method for joining the seal portion 13 and the cup body 14 is not particularly limited as long as the seal portion 13 and the cup body 14 can be joined.
- both the seal portion 13 and the cup body 14 are made of metal, for example, brazing can be adopted as a joining method thereof.
- welding can be employ
- one of the seal part 13 and the cup body 14 is made of metal and the other is made of resin, for example, insert molding or welding can be adopted as a joining method thereof.
- both the seal part 13 and the cup main body 14 are resin, as a joining method, for example, two-color molding or welding can be adopted.
- the material of the seal portion 13 and the cup body 14 is metal. Moreover, let the manufacturing method of the seal part 13 and the cup main body 14 be cutting. In this case, joining of the seal part 13 and the cup main body 14 can be performed by brazing, for example.
- the material of the seal part 13 and the cup body 14 is metal. Moreover, the manufacturing method of the seal part 13 is set as press work, and the manufacturing method of the cup main body 14 is set as cutting. In this case, joining of the seal part 13 and the cup main body 14 can be performed by brazing, for example.
- the material of the seal portion 13 is resin
- the material of the cup body 14 is metal
- the manufacturing method of the seal part 13 is injection molding
- the manufacturing method of the cup body 14 is cutting. In this case, joining of the seal part 13 and the cup main body 14 can be performed by insert molding or welding, for example.
- the material of the seal part 13 and the cup body 14 is metal.
- the production method of the seal part 13 is set as cutting, and the production method of the cup main body 14 is set as press work.
- joining of the seal part 13 and the cup main body 14 can be performed by brazing, for example.
- the material of the seal portion 13 and the cup body 14 is metal. Moreover, let the production methods of the seal part 13 and the cup main body 14 be press work. In this case, joining of the seal part 13 and the cup main body 14 can be performed by brazing, for example.
- the material of the seal portion 13 is resin
- the material of the cup body 14 is metal
- the production method of the seal part 13 is injection molding
- the production method of the cup body 14 is press working.
- joining of the seal part 13 and the cup main body 14 can be performed by insert molding or welding, for example.
- the material of the seal portion 13 and the cup body 14 is metal.
- the manufacturing method of the seal portion 13 is cutting, and the manufacturing method of the cup body 14 is casting.
- joining of the seal part 13 and the cup main body 14 can be performed by brazing, for example.
- the material of the seal portion 13 and the cup body 14 is metal.
- the production method of the seal part 13 is press working, and the production method of the cup body 14 is casting.
- joining of the seal part 13 and the cup main body 14 can be performed by brazing, for example.
- the material of the seal portion 13 is resin, and the material of the cup body 14 is metal.
- the production method of the seal portion 13 is injection molding, and the production method of the cup body 14 is casting. In this case, joining of the seal part 13 and the cup main body 14 can be performed by insert molding or welding, for example.
- the material of the seal portion 13 and the cup body 14 is metal. Moreover, let the production method of the seal part 13 be cutting, and let the production method of the cup main body 14 be metal injection. In this case, joining of the seal part 13 and the cup main body 14 can be performed by brazing, for example.
- the material of the seal portion 13 and the cup body 14 is metal.
- the manufacturing method of the seal part 13 is set as press work, and the manufacturing method of the cup main body 14 is set as metal injection.
- joining of the seal part 13 and the cup main body 14 can be performed by brazing, for example.
- the material of the seal portion 13 is resin
- the material of the cup body 14 is metal
- the production method of the seal part 13 is injection molding
- the production method of the cup body 14 is metal injection.
- joining of the seal part 13 and the cup main body 14 can be performed by insert molding or welding, for example.
- the material of the seal portion 13 and the cup body 14 is metal.
- the manufacturing method of the seal part 13 is set as cutting, and the manufacturing method of the cup main body 14 is set as hot forging.
- joining of the seal part 13 and the cup main body 14 can be performed by brazing, for example.
- the material of the seal part 13 and the cup body 14 is metal.
- the manufacturing method of the seal part 13 is set to press work, and the manufacturing method of the cup main body 14 is set to hot forging.
- joining of the seal part 13 and the cup main body 14 can be performed by brazing, for example.
- the material of the seal portion 13 is resin
- the material of the cup body 14 is metal.
- the production method of the seal portion 13 is injection molding, and the production method of the cup body 14 is hot forging. In this case, joining of the seal part 13 and the cup main body 14 can be performed by insert molding or welding, for example.
- the material of the seal portion 13 and the cup body 14 is metal. Moreover, the manufacturing method of the seal part 13 is set as cutting, and the manufacturing method of the cup main body 14 is set as cold forging. In this case, joining of the seal part 13 and the cup main body 14 can be performed by brazing, for example.
- the material of the seal portion 13 and the cup body 14 is metal.
- the manufacturing method of the seal part 13 is set as press work, and the manufacturing method of the cup main body 14 is set as cold forging.
- joining of the seal part 13 and the cup main body 14 can be performed by brazing, for example.
- the material of the seal portion 13 is resin
- the material of the cup body 14 is metal.
- the production method of the seal part 13 is injection molding, and the production method of the cup body 14 is cold forging. In this case, joining of the seal part 13 and the cup main body 14 can be performed by insert molding or welding, for example.
- the material of the seal portion 13 and the cup body 14 is metal.
- the manufacturing method of the seal portion 13 is cutting, and the manufacturing method of the cup body 14 is lost wax.
- joining of the seal part 13 and the cup main body 14 can be performed by brazing, for example.
- the material of the seal portion 13 and the cup body 14 is metal.
- the manufacturing method of the seal part 13 is set to press work, and the manufacturing method of the cup main body 14 is set to lost wax.
- joining of the seal part 13 and the cup main body 14 can be performed by brazing, for example.
- the material of the seal portion 13 is resin, and the material of the cup body 14 is metal.
- the manufacturing method of the seal portion 13 is injection molding, and the manufacturing method of the cup body 14 is lost wax. In this case, joining of the seal part 13 and the cup main body 14 can be performed by insert molding or welding, for example.
- the material of the seal portion 13 is metal, and the material of the cup body 14 is resin.
- the manufacturing method of the seal portion 13 is cutting, and the manufacturing method of the cup body 14 is injection molding. In this case, joining of the seal part 13 and the cup main body 14 can be performed by insert molding or welding, for example.
- the material of the seal portion 13 is metal, and the material of the cup body 14 is resin.
- the manufacturing method of the seal portion 13 is press working, and the manufacturing method of the cup body 14 is injection molding. In this case, joining of the seal part 13 and the cup main body 14 can be performed by insert molding or welding, for example.
- the material of the seal portion 13 and the cup body 14 is resin.
- the manufacturing method of the seal part 13 and the cup main body 14 be injection molding.
- the joining of the seal portion 13 and the cup body 14 can be performed by, for example, two-color molding or welding.
- the manufacturing method of the seal part 13 is a cutting process, the dimensional accuracy of the airtight holding surface 10 can be increased while ensuring the mass productivity of the seal part 13.
- the manufacturing cost is lower than when the seal part 13 is manufactured by cutting, and the restriction on the plate thickness of the seal part 13 is eased.
- the manufacturing method of the seal part 13 is resin injection molding
- the positional accuracy of the seal part 13 with respect to a predetermined reference position in the fuel distribution and supply device 1 can be managed by resin injection molding of the seal part 13. For this reason, the position shift of the seal part 13 with respect to the predetermined reference position in the fuel distribution and supply device 1 can be suppressed.
- the cup body 14 When the manufacturing method of the cup body 14 is a cutting process, the cup body 14 may have a lower dimensional accuracy than the seal portion 13. For this reason, compared with the case where the seal part 13 and the cup main body 14 are integrally cut, the production cost is reduced, and the mass productivity of the seal part 13 can be ensured.
- the manufacturing cost of the cup body 14 is lower than that in the case where the cup body 14 is manufactured by cutting, and the restriction on the plate thickness of the cup body 14 is eased.
- the production cost is lower than when the cup body 14 is produced by cutting.
- the production cost of the cup body 14 is metal injection, the production cost is lower than when the cup body 14 is produced by cutting.
- the production cost is lower than when the cup body 14 is produced by cutting.
- the production cost is lower than when the cup body 14 is produced by cutting.
- the production cost of the cup body 14 is lower than when the cup body 14 is produced by cutting.
- the manufacturing method of the cup body 14 is resin injection molding
- the positional accuracy of the seal portion 13 with respect to a predetermined reference position in the fuel distribution and supply device 1 can be managed by resin injection molding of the cup body 14. For this reason, the position shift of the seal part 13 with respect to the predetermined reference position in the fuel distribution and supply device 1 can be suppressed.
- the seal portion 13 is formed with the airtight holding surface 10 for holding the fuel injection device 4 in an airtight manner. 14 and a separate member. And the seal part 13 and the cup main body 14 are joined in the state in which the seal part 13 was inserted in the seal part insertion hole 18. For this reason, the seal part 13 and the cup main body 14 which comprise the cup part 6 are producible with another processing method.
- the cup portion 6 is required to have high dimensional accuracy for the airtight holding surface 10, but the surface other than the airtight holding surface 10 is not required to be as accurate as the airtight holding surface 10.
- the seal part 13 can be produced by a machining method that provides high dimensional accuracy such as cutting, and the cup body 14 can be produced by a low cost machining method such as casting. Thereby, cost reduction can be achieved, maintaining the airtightness between the cup part 6 and the fuel-injection apparatus 4.
- FIG. 1
- the seal portion 13 covers the entire seal portion insertion hole 18, the airtightness with the fuel injection device 4 can be maintained without being influenced by the state of the cup body 14. For example, when the cup body 14 is produced by casting, even if a casting hole is formed in the cup body 14, the casting hole is covered with the seal portion 13, so that fuel leakage due to the influence of the casting hole can be prevented. .
- the seal portion 13 keeps airtightness with the fuel injection device 4, and the cup body 14 holds the seal portion 13. For this reason, the performance required for the seal portion 13 and the cup body 14 is different. Therefore, by using different materials for the seal portion 13 and the cup body 14, the seal portion 13 is made of a material having optimum characteristics required for the seal portion, and the cup body 14 is the optimum required for the cup body 14. It can be made of a material having special characteristics. Thereby, the function improvement of the seal part 13 and the cup main body 14 can be aimed at.
- the cup portion 6 can be reduced in weight and cost.
- either one of the seal part 13 and the cup body 14 is made of resin, and the other is made of metal.
- intensity can be ensured, aiming at the weight reduction and cost reduction of the cup part 6.
- FIG. Moreover, the positional accuracy of the seal portion 13 with respect to a predetermined reference position in the fuel distribution and supply device 1 can be managed by resin injection molding. For this reason, the position shift of the seal part 13 with respect to the predetermined reference position in the fuel distribution and supply device 1 can be suppressed. In this case, the position difference of the seal part 13 with respect to the predetermined reference position in the fuel distribution supply device 1 can be further suppressed by making the seal part 13 made of resin.
- the thermal expansion coefficient of the seal part 13 is made larger than the thermal expansion coefficient of the cup body 14, it is possible to prevent the seal part 13 from dropping from the cup body 14 when the cup part 6 is heated. it can.
- the seal part 13 and the cup body 14 are joined by brazing, the seal part 13 can be prevented from dropping from the cup body 14 during brazing.
- the joining strength between the seal part 13 and the cup body 14 can be increased by joining the seal part 13 and the cup body 14 by brazing. .
- the second embodiment is basically the same as the first embodiment, and only the shape of the cup part is different from the first embodiment. For this reason, in the following description, only matters different from the first embodiment will be described, and the same description as in the first embodiment will be omitted.
- FIG. 8 is a cross-sectional view of the cup portion in the fuel distribution and supply apparatus according to the second embodiment. 8 shows a cross-sectional view at the same position as FIG. As shown in FIG. 8, in 2nd Embodiment, the cup part 6a corresponding to the cup part 6 of 1st Embodiment is provided.
- the cup part 6a includes a seal part 13a corresponding to the seal part 13 of the first embodiment, and a cup body 14a corresponding to the cup body 14 of the first embodiment.
- the seal part 13a is a constituent member of the cup part 6a in which the airtight holding surface 10 of the cup part 6a is formed.
- the seal portion 13a is a separate member from the cup body 14a.
- the seal portion 13 a is formed in a cylindrical shape centered on the central axis L of the fuel injection device insertion hole 9.
- the seal portion 13a extends from the joint surface 7 to the front end surface 8, and a fuel injection device insertion hole 9 for the cup portion 6a is formed on the inner peripheral surface of the seal portion 13a. That is, a part of the fuel injection device insertion hole 9 is formed in the seal portion 13a.
- the inner peripheral surface of the seal portion 13a is an airtight holding surface 10.
- the cup body 14a is a component of the cup part 6 that is joined to the high-pressure fuel storage part 5 and holds the seal part 13a.
- the cup body 14a is a separate member from the seal portion 13a.
- the cup body 14a is formed with a seal portion insertion hole 18a into which the seal portion 13a is inserted.
- the seal portion insertion hole 18a will be described as a through hole penetrating the cup body 14a.
- the seal portion insertion hole 18a may not penetrate the cup body 14a as long as it communicates with the internal space of the high-pressure fuel storage portion 5 through a horizontal hole or the like.
- the seal portion insertion hole 18a includes a small-diameter inner peripheral surface 19a disposed on the joining surface 7 side, a large-diameter inner peripheral surface 20a disposed on the distal end surface 8 side, a small-diameter inner peripheral surface 19a, and a large-diameter inner peripheral surface 20a. And an enlarged inner peripheral surface 21a disposed between the two.
- the small-diameter inner peripheral surface 19a, the large-diameter inner peripheral surface 20a, and the enlarged-diameter inner peripheral surface 21a are formed in a circular cross section with the central axis L of the fuel injection device insertion hole 9 as the center.
- the inner diameter of the small-diameter inner peripheral surface 19a is substantially the same as the inner diameter of the small-diameter portion 15 of the seal portion 13 of the first embodiment, and the inner diameter of the large-diameter inner peripheral surface 20a is outside the seal portion 13a.
- the diameter-enlarged inner peripheral surface 21a is linearly expanded from the small-diameter inner peripheral surface 19a to the large-diameter inner peripheral surface 20a.
- the enlarged inner peripheral surface 21a is bent at a right angle to the smaller inner peripheral surface 19a and the larger inner peripheral surface 20a, thereby extending in a direction perpendicular to the central axis L of the fuel injection device insertion hole 9. It may be.
- cup main body 14a and the seal part 13a are joined to the cup part 6a in a state where the seal part 13a is inserted into the seal part insertion hole 18a. That is, in the cup portion 6a, the seal portion 13a and the cup main body 14a are joined in a state where the outer peripheral surface of the seal portion 13a is in close contact with the large-diameter inner peripheral surface 20a of the cup main body 14a. For this reason, only a part of the seal portion insertion hole 18a is covered with the seal portion 13a.
- the third embodiment is basically the same as the second embodiment, and only the shape of the seal part is different from the second embodiment. For this reason, in the following description, only matters different from the second embodiment will be described, and description similar to that of the second embodiment will be omitted.
- FIG. 9 is a cross-sectional view of the cup portion in the fuel distribution and supply apparatus according to the third embodiment.
- FIG. 9 shows a cross-sectional view at the same position as FIG.
- the cup part 6b corresponding to the cup part 6a of 2nd Embodiment is provided.
- the cup portion 6b includes a seal portion 13b corresponding to the seal portion 13a of the second embodiment, and a cup body 14a similar to the second embodiment.
- the seal portion 13b is basically the same as the seal portion 13a of the second embodiment, but a notch 31 for installing the brazing material 32 is formed at the distal end portion on the joining surface 7 side.
- the notch 31 is formed over the entire circumferential direction of the seal portion 13b on the outer peripheral surface side of the seal portion 13b. For this reason, it is easy to install the ring-shaped brazing material 32 in the notch 31.
- the cross-sectional shape of the notch 31 is not specifically limited, For example, it can be made into a rectangular shape.
- the fourth embodiment is basically the same as the second embodiment, and is different from the second embodiment only in the shape of the cup portion. For this reason, in the following description, only matters different from the second embodiment will be described, and description similar to that of the second embodiment will be omitted.
- FIG. 10 is a perspective view of the cup portion in the fuel distribution and supply apparatus according to the fourth embodiment.
- 11 is a cross-sectional view taken along line XI-XI shown in FIG.
- a cup portion 6c corresponding to the cup portion 6a of the second embodiment is provided in the fourth embodiment.
- the cup portion 6c includes a seal portion 13c corresponding to the seal portion 13a of the second embodiment, and a cup body 14c corresponding to the cup body 14a of the second embodiment.
- the cup body 14c is basically the same as the cup body 14a of the second embodiment, but the stay portion 11 protrudes from the tip surface 8 of the cup portion 6c.
- the tip surface 11c of the stay portion 11 is a surface perpendicular to the central axis L of the fuel injection device insertion hole 9, that is, a surface parallel to the tip surface 8 of the cup body 14c.
- the stay portion 11 is described as an integral part of the cup portion 6c, but the stay portion 11 may be separate from the cup portion 6c.
- the seal portion 13c includes the same cylindrical portion 33 as the seal portion 13a of the second embodiment, and a flange-shaped flange portion 34.
- the flange portion 34 projects radially outward from the distal end portion of the cylindrical portion 33.
- the front end surface 34 c of the flange portion 34 is a surface perpendicular to the central axis L of the fuel injection device insertion hole 9, that is, a surface parallel to the front end surface 8 of the cup body 14 c and the front end surface 11 c of the stay portion 11. Yes.
- a part of the cylindrical portion 33 of the seal portion 13c is inserted into the seal portion insertion hole 18a of the cup main body 14c, and a portion of the cylindrical portion 33 and the flange portion 34 protrude from the cup main body 14 to protrude the flange portion.
- the cup body 14c and the seal portion 13c are joined together in a state where the tip end surface 34c of 34 and the tip end surface 11c of the stay portion 11 are arranged on the same plane.
- the flange portion 34 is formed in the seal portion 13c, and the seal portion 13c and the cup are in a state where the seal portion 13c protrudes from the cup body 14.
- the distal end surface 34c of the flange portion 34 and the distal end surface 11c of the stay portion 11 can be arranged on the same plane.
- first to fourth embodiments may be appropriately combined.
- the notch formed in the seal part of the third embodiment may be formed in the seal part of the first and fourth embodiments, and the flange part formed in the seal part of the fourth embodiment. May be formed in the seal portion of the first to third embodiments.
- a fuel distribution supply apparatus is not limited to these shapes, It can change suitably according to a model etc. of an engine.
- Examples of the engine type include a series type, a V type, and a horizontally opposed type.
- SYMBOLS 1 Fuel distribution supply apparatus, 2 ... Fuel pump, 3 ... Joint pipe, 4 ... Fuel injection apparatus, 5 ... High pressure fuel storage part, 6 ... Cup part, 6a ... Cup part, 6b ... Cup part, 6c ... Cup part, DESCRIPTION OF SYMBOLS 7 ... Joint surface, 8 ... Front end surface, 9 ... Fuel-injection-device insertion hole, 10 ... Airtight holding surface, 11 ... Stay part, 11c ... End surface, 12 ... Bolt hole, 13 ... Seal part, 13a ... Seal part, 13b ... Seal part, 13c ... Seal part, 14 ... Cup body, 14a ... Cup body, 14c ... Cup body, 15 ...
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
次に、第2の実施形態について説明する。第2の実施形態は、基本的に第1の実施形態と同様であり、カップ部の形状のみ第1の実施形態と相違する。このため、以下の説明では、第1の実施形態と相違する事項のみを説明し、第1の実施形態と同様の説明を省略する。
次に、第3の実施形態について説明する。第3の実施形態は、基本的に第2の実施形態と同様であり、シール部の形状のみ第2の実施形態と相違する。このため、以下の説明では、第2の実施形態と相違する事項のみを説明し、第2の実施形態と同様の説明を省略する。
次に、第4の実施形態について説明する。第4の実施形態は、基本的に第2の実施形態と同様であり、カップ部の形状のみ第2の実施形態と相違する。このため、以下の説明では、第2の実施形態と相違する事項のみを説明し、第2の実施形態と同様の説明を省略する。
Claims (8)
- 複数の燃料噴射装置に燃料を供給するために、前記燃料を高圧状態で貯留する高圧燃料貯留部と、
前記各燃料噴射装置を気密に保持して、前記高圧燃料貯留部に貯留されている前記燃料を前記各燃料噴射装置に供給する複数のカップ部と、
を備え、
前記カップ部は、
前記各燃料噴射装置を気密に保持する気密保持面が形成されたシール部と、
高圧燃料貯留部に接合されて、前記シール部が挿入されるシール部挿入孔が形成されたカップ本体と、
を有し、
前記シール部と前記カップ本体とは、別部材で形成されて接合されている、
燃料分配供給装置。 - 前記シール部は、前記カップ本体の前記シール部挿入孔を覆っている、
請求項1に記載の燃料分配供給装置。 - 前記シール部と前記カップ本体とは異種素材である、
請求項1又は2に記載の燃料分配供給装置。 - 前記シール部及び前記カップ本体の少なくとも一方は樹脂製である、
請求項1又は2に記載の燃料分配供給装置。 - 前記シール部及び前記カップ本体のうち、何れか一方は樹脂製であり、何れか他方は金属製であり、
前記シール部と前記カップ本体とは、インサート成形により接合されている、
請求項1又は2に記載の燃料分配供給装置。 - 前記シール部は、樹脂製である、
請求項1又は2に記載の燃料分配供給装置。 - 前記シール部の熱膨張率は、前記カップ本体の熱膨張率よりも大きい、
請求項1~6の何れか一項に記載の燃料分配供給装置。 - 前記シール部及び前記カップ本体は、金属製であり、
前記シール部と前記カップ本体とは、ロウ付けにより接合されており、
前記シール部の外周面に、ロウ材を設置するための切り欠きが形成されている、
請求項1又は2に記載の燃料分配供給装置。
Priority Applications (3)
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CN201480067840.8A CN105829699B (zh) | 2013-12-20 | 2014-10-31 | 燃料分配供给装置 |
US15/105,540 US20160319787A1 (en) | 2013-12-20 | 2014-10-31 | Fuel distribution/supply device |
DE112014005902.1T DE112014005902B4 (de) | 2013-12-20 | 2014-10-31 | Kraftstoffverteilungs/Versorgungsvorrichtung |
Applications Claiming Priority (2)
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JP2013263932A JP6343444B2 (ja) | 2013-12-20 | 2013-12-20 | 燃料分配供給装置 |
JP2013-263932 | 2013-12-20 |
Publications (1)
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WO2015093163A1 true WO2015093163A1 (ja) | 2015-06-25 |
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ID=53402520
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PCT/JP2014/079126 WO2015093163A1 (ja) | 2013-12-20 | 2014-10-31 | 燃料分配供給装置 |
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US (1) | US20160319787A1 (ja) |
JP (1) | JP6343444B2 (ja) |
CN (1) | CN105829699B (ja) |
DE (1) | DE112014005902B4 (ja) |
WO (1) | WO2015093163A1 (ja) |
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Also Published As
Publication number | Publication date |
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DE112014005902T5 (de) | 2016-09-22 |
CN105829699A (zh) | 2016-08-03 |
CN105829699B (zh) | 2018-09-04 |
US20160319787A1 (en) | 2016-11-03 |
JP2015121107A (ja) | 2015-07-02 |
JP6343444B2 (ja) | 2018-06-13 |
DE112014005902B4 (de) | 2023-03-16 |
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