CN103502624A - Fuel distributor - Google Patents

Fuel distributor Download PDF

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Publication number
CN103502624A
CN103502624A CN201280021116.2A CN201280021116A CN103502624A CN 103502624 A CN103502624 A CN 103502624A CN 201280021116 A CN201280021116 A CN 201280021116A CN 103502624 A CN103502624 A CN 103502624A
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CN
China
Prior art keywords
screw element
fuel distributor
fuel
housing parts
seal ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201280021116.2A
Other languages
Chinese (zh)
Other versions
CN103502624B (en
Inventor
M·法伊格尔
H·乌里希
J·魏斯
N·豪特曼
D·乌伦布洛克
M·格纳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of CN103502624A publication Critical patent/CN103502624A/en
Application granted granted Critical
Publication of CN103502624B publication Critical patent/CN103502624B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8076—Fuel injection apparatus manufacture, repair or assembly involving threaded members
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic materials

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

A fuel distributor (1), which serves in particular for fuel injection systems of mixture-compressing, applied-ignition internal combustion engines, comprises at least one housing part (2) enclosing a fuel chamber (3), comprises at least one screw element (6), and comprises at least one sealing ring (14). Here, there is provided on the housing part (2) a recess (4) into which the screw element (6) is screwed in a self-tapping manner. Here, the sealing ring (14) forms a seal between the screw element (6) and the housing part (2). Chips formed during the screwing-in process thus remain reliably separated from the fuel chamber (3). The screw element (6) has an external thread (7), wherein on the screw element (6) there is formed an annular groove (15) which receives the sealing ring (14), and wherein the sealing ring (14) leads the external thread (7) of the screw element (6).

Description

Fuel distributor
Technical field
The present invention relates to a kind of fuel distributor, be particularly useful for mixing the fuel injection system of the external source ignition internal combustion engine compressed.Particularly, the present invention is applicable to be designed to the fuel injection system of medium voltage network.
Background technique
Be applicable under the fuel distributor track situation of direct fuel injection ejecting system, described fuel distributor track is under high pressure worked and, for Motor Vehicle, steel or aluminium can be used as structural material.Under the fuel distributor track situation of the fuel injection system for thering is the intake manifold injection structure, in contrast, use thin-wall steel tube, plastic tube or perhaps also use aluminum pipe.But be applicable to the fuel injection system of high-pressure applications especially at about 20MPa(200bar) lower work, the fuel injection system cheaply that is applicable to low-pressure applications is generally at 0.3MPa to 0.5Mpa only, in other words, applicable under 3bar to 5bar.
Divide into and want by brazing process, high pressure joint to be fixed on the house steward who is formed from steel in the fuel distributor track situation be made of a steel.From process aspect, this is impossible under the plastic tube situation.Certainly, under the plastic tube situation, by suitable welding process, form and connect.
Summary of the invention
The advantage had according to the fuel distributor of feature of the present invention, as to have claim 1 is that a kind of connection that is applicable to middle pressure can be provided, and is particularly useful for joint or stopper, and it has lower manufacture cost.
The favourable improvement project of the fuel distributor that can obtain providing in claim 1 by the measure of enumerating in dependent claims.
Advantageously, described screw element is designed to have link and leads to the joint component of the through hole described fuel chamber from link.Thus, realize being applicable to the joint of middle pressure.Fuel line can be assemblied on this joint, in order to the fuel under certain pressure is directed in the fuel chamber of described fuel distributor.Described joint can pass through screw here in an advantageous manner, and especially thread tapping screws in and realizes.
Certainly also advantageously, at least one screw element is designed to stopper.For example, described fuel distributor is designed to elongated fuel distributor, and wherein, joint component is arranged on an end and stopper is arranged on the other end.Thus, described fuel distributor also can adapt to different installation situation in case of necessity.
Advantageously, described screw element has outside thread, and forms the circular groove that receives seal ring on described screw element.Here also advantageously, the inner diameter of described circular groove is less than the externally threaded screw thread inner diameter of described screw element.Described seal ring may not be applied in load when screwing in thus, and thereby not damaged.It is extra favourable that described seal ring coordinates less diameter, less because the diameter of hydraulic pressure useful effect becomes thus, and then the power occurred also becomes less.
Also advantageously, the outside thread of described screw element has conical screw thread form, and described conical screw thread form has than the cylindrical of the acceptance division of described housing parts or angle that coniform shape is more precipitous.By described conical screw thread form, the first lead of screw thread is advancing slip in plastic part is less than last lead of screw thread, and wherein, described conical screw thread form has ratio angle as more precipitous as the demoulding slope of plastics die castings.Therefore, produce less breach on the first lead of screw thread of described screw, and but a discernible transfer charge definitely still appears when last lead of screw thread, wherein, the possible point of rupture that occurs preferred tubular shell part on the first lead of screw thread of described screw, the advantage that described less breach has is the high strength of described housing parts, especially the tubular shell part.Thus, described screw element can be designed to preferably short, thereby reduces materials consumption and dwindle needed structure space.
Also advantageously, at the outside thread of described screw element and the circular groove towards between an end of fuel chamber of described screw element, be arranged on described screw element.Here advantageously, described seal ring is before the outside thread of described screw element.Therefore, can realize a kind of like this configuration, in this configuration, be arranged in seal ring in described circular groove when screwing in described screw element before described outside thread.Special benefits while obtaining the thread tapping screw-in here.Described seal ring seals the outside thread of described screw element for described fuel chamber.Swarf in threaded portion and other impurity thereby can no longer inwardly move, arrive in fuel chamber outside.In addition, these swarfs and perhaps also not outwards motion of other impurity.Therefore, the impurity of existence keeps being enclosed in described outside thread zone.Therefore, avoid immediately the being in operation function validity of the described fuel injection system of infringement.
In an advantageous manner, described housing parts consists of plastics, especially is configured to die castings.Can manufacture at low cost thus.Also advantageously, on described housing parts at the longitudinal direction of the axis with respect to described screw element and/or design in a lateral direction lengthways of rod or horizontal rib.Improve thus the stability that the housing parts that plastics make is arranged.Particularly, under plastics die castings situation, described wall intensity is restricted.Advantageously, at least, in the zone of described screw element, the length of described lengthways of rod or the mutual spacing of described horizontal rib are greater than the lead of screw thread in the described housing parts of the externally threaded screw-in of described screw element.Thus, described power outwards is delivered on the jagged more high-intensity zone of not having of described housing parts by the breach of the first lead of screw thread.
The accompanying drawing explanation
With reference to accompanying drawing, at length set forth the preferred embodiments of the present invention in following explanation, in the accompanying drawings, identical element is provided with identical reference character.Shown in the drawings:
Fig. 1 illustrates the fuel distributor of corresponding first embodiment of the invention with the schematic cross-section of summary; With
Fig. 2 illustrates the fuel distributor of corresponding second embodiment of the invention with the schematic cross-section of summary.
Embodiment
Fig. 1 illustrates the embodiment of fuel distributor 1 of the present invention with the schematic cross-section of summary.Fuel distributor 1 can especially be designed to the form of fuel distributor pressing plate 1.Fuel distributor 1 is particularly useful for mixing the external source ignition internal combustion engine of compression.Particularly, fuel distributor 1 is applicable to medium voltage network here.Can be positioned at 3MPa to 10MPa for being pressed in here of this medium voltage network, 30bar is in the scope of 100bar in other words.Especially, described middle pressure can be at 5MPa to 7MPa, in other words in the scope of 50bar to 70bar.Certainly also be applicable to other application scenarios according to fuel distributor 1 of the present invention.
Fuel distributor 1 has housing parts 2, and housing parts 2 is around fuel chamber 3.Housing parts 2 can form the housing 2 of fuel distributor 1.Described housing also can form by a plurality of housing parts 2 certainly.Housing parts 2 has recess 4, and internal thread 5 is arranged on recess 4.
Screw element 6 also is set, and screw element 6 has outside thread 7.Screw element 6 utilizes outside thread 7 screw-ins to have in the recess 4 of internal thread 5.
Here, in embodiment, screw element 6 has link 8 and is directed to the through hole 9 in fuel chamber 3 by link 8.Outside thread 10 and cone 11 can be arranged on link 8.Link 8 correspondingly forms high pressure joint here, in order to can make the connection of fuel line.Fuel is directed to the fuel chamber 3 of fuel distributor 1 by pump by fuel line.
In addition, screw base 12 is set on screw element 6, abuts under the screw-in state on the end face 13 of housing parts 2, and restriction screw element 6 is screwed in the recess 4 of housing parts 2.
In this embodiment, screw element 6 is designed to joint component 6.Screw element 6 also can be designed to stopper certainly.Save through hole 9 here.In addition, also can save link 8.
Fuel distributor 1 has seal ring 14.Seal ring 14 forms sealing between screw element 6 and housing parts 2.Therefore, fuel chamber 3 in the zone of screw element 6 with respect to environmental sealing.Seal ring 14 is preferably designed for O shape ring 14 in original state, and it has the profile of sub-circular.Seal ring 14 is preferably designed for anti-fuel, especially anti-diesel oil.Seal ring 14 also is designed to low temperature resistant, preferably until-30 ℃ or also keep stable when low temperature.
Screw element 6 has circular groove 15, and circular groove 15 receives seal ring 14.The inner diameter 16 of circular groove 15 is arranged to be less than the screw thread inner diameter 17 of the outside thread 7 of screw element 6 here.Thus, seal ring 14 is not loaded and is therefore not damaged when screwing in.Obtain in addition less the hydraulic pressure more diameter of useful effect and the power of less appearance.
Circular groove 15 is arranged between the end towards fuel chamber 3 18 of the outside thread 7 of screw element 6 and screw element 6.Thereby, when screw element 6 is screwed in recess 4, at first seal ring 14 moves along the wall of recess 4.The cutting of the internal thread 5 of recess 4 preferably realizes by thread tapping and the self-cutting of screw element 6.Seal ring 14 thereby move along smooth wall, thus seal ring 14 is not damaged.Then, outside thread 10 is cut in the wall of recess 4, thereby the internal thread 5 of recess 4 is by moulding.Seal ring 14 is before the outside thread 7 of screw element 6.
Therefore, between seal ring 14 and screw base 12, the zone of the outside thread 7 of assurance screw element 6 is on the one hand about fuel chamber's 3 sealings with on the other hand about environmental sealing.The swarf produced in the thread tapping screwed in and self-cutting process or other foreign matter thereby remain on the inside and can not arrive fuel chamber 3.Particularly, under the fuel situation strengthened at glass fibre, it is favourable that the self-cutting realized by the cutting edge of screw element 6 screws in.
Carry out leakage check in order to alleviate the sealing formed by seal ring 14, transverse holes 20 can be set, for example be arranged on housing parts 2 between the outside thread 7 of seal ring 14 and the screw element 6 that screws in.
The outside thread 7 of screw element 6 preferably has conical screw thread form, it circular groove 21 tapered extend to fuel chamber 3.The recess 4 of housing parts 2 can have conical shape equally.Under two kinds of situations, the taper thread shape of the outside thread 7 of screw element 6 implements more precipitous angle than the cylindrical or conical shape of the recess of housing parts 24.Therefore, on the first lead of screw thread of screw element 6, obtain less breach, there is the high-intensity advantage of screw element 6 and housing parts 2.In addition, also definitely still transmit a discernible load when last lead of screw thread.Described screw can best be realized shortly thus.Otherwise the first lead of screw thread bears the major part of described load, and lead of screw thread is in contrast made any contribution hardly.6 of screw element do not need very long yet.
Thereby screw element 6 is to improve the intensity of the screw element 6 with the short outside thread 7 of the best about the advantage of the precipitous tapering of housing parts 2.
By the screw base 12 as backstop, seal ring 14 has the position of a restriction after installation, especially about transverse holes 20.In addition, the swarf that obtains producing when screwing in by screw base 12 also is being stopped on this end aspect discharge.
Fig. 2 illustrates the fuel distributor 1 of corresponding second embodiment of the invention with the schematic cross-section of summary.Housing parts 2 is configured to the plastics die castings here.Under this plastics die castings (plastics diecast parts) 2 situations, described wall intensity is restricted.In order to improve intensity, lengthways of rod 22,23,24 and horizontal rib 25,26 are set on housing parts 2.Thus, described intensity can be improved by the cage moulding of rib 22 to 26.Lengthways of rod 22 to 24 can be used as axial tractive rib 22 to 24 here.In order to simplify view, a mark rib 22 to 26 in Fig. 2.
The mutual spacing of the length 27 of lengthways of rod 22 to 24 or horizontal rib 25,26 is greater than the reach 28(Fig. 1 in housing parts 2 that is screwed into of screw element 6).Thus, described power outwards is delivered on the jagged more high-intensity zone of not having of described housing parts by the breach of the first lead of screw thread.Therefore, the existing geometrical shape of the screw thread edge based on self-tapping screw element 6, can provide a kind of more high-intensity and thicker joint or stopper for withstand voltage fuel distributor 1, and its housing parts 2 is by the plastics manufacture.The screw-in of screw element 6 is here undertaken by suitable driver 29, and wherein, driver 29 is arranged on screw element 6.Lengthways of rod 22 to 24 axis 31 about screw element 6 on longitudinal direction 21 is arranged.Lengthways of rod 25,26 axis 31 about screw element 6 on horizontal direction 30 is arranged.
The invention is not restricted to described embodiment.

Claims (9)

1. fuel distributor (1), be particularly useful for mixing the fuel injection system of the external source ignition internal combustion engine compressed, this fuel distributor has the fuel chamber (3) surrounded by least one housing parts (2), at least one screw element (6) and at least one seal ring (14), wherein, recess (4) is arranged on housing parts (2), described screw element (6) is screwed in described recess (4), wherein, described seal ring (14) forms sealing between described screw element (6) and housing parts (2), wherein, described screw element (6) has outside thread (7), wherein, circular groove (15) is arranged on described screw element (6), this circular groove is for receiving seal ring (14), and wherein, described seal ring (14) at the outside thread (7) of described screw element (6) before.
2. fuel distributor according to claim 1, is characterized in that, described screw element (6) is designed to have link (8) and be directed to the joint component (6) of the through hole (9) in described fuel chamber (3) by described link (8).
3. fuel distributor according to claim 1 and 2, is characterized in that, described at least one screw element (6) is designed to stopper (6).
4. according to the described fuel distributor of any one in claims 1 to 3, it is characterized in that, the inner diameter (16) of described circular groove (15) is less than the screw thread inner diameter (17) of the outside thread (7) of described screw element (6).
5. according to the described fuel distributor of any one in claim 1 to 4, it is characterized in that, the outside thread (7) of described screw element (6) has than the cylindrical or coniform shape of the recess of described housing parts (2) (4) the conical screw thread form of steep angle more.
6. according to the described fuel distributor of any one in claim 1 to 5, it is characterized in that, described circular groove (15) is arranged in screw element (6) between the end towards fuel chamber (3) (18) of the outside thread (7) of described screw element (6) and screw element (6).
7. according to the described fuel distributor of any one in claim 1 to 6, it is characterized in that, described housing parts (2), by constructed in plastic material, especially is configured to the plastics die castings.
8. fuel distributor according to claim 7, it is characterized in that, at the upper longitudinal direction (21) in the axis with respect to described screw element (6) (31) of described housing parts (2) and/or the upper moulding lengthways of rod (22-24) of horizontal direction (30) or horizontal rib (25,26).
9. fuel distributor according to claim 8, it is characterized in that, at least, in the zone of described screw element (6), the mutual spacing of the length (27) of described lengthways of rod (22-24) or horizontal rib (25,26) is greater than the reach that is screwed into housing parts (2) (28) of described screw element (6).
CN201280021116.2A 2011-05-02 2012-03-15 Fuel distributor Active CN103502624B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102011075059A DE102011075059A1 (en) 2011-05-02 2011-05-02 fuel distributor
DE102011075059.2 2011-05-02
PCT/EP2012/054516 WO2012150073A1 (en) 2011-05-02 2012-03-15 Fuel distributor

Publications (2)

Publication Number Publication Date
CN103502624A true CN103502624A (en) 2014-01-08
CN103502624B CN103502624B (en) 2017-06-09

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ID=45872939

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201280021116.2A Active CN103502624B (en) 2011-05-02 2012-03-15 Fuel distributor

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Country Link
EP (1) EP2705240B1 (en)
CN (1) CN103502624B (en)
DE (1) DE102011075059A1 (en)
PL (1) PL2705240T3 (en)
RU (1) RU2601012C2 (en)
WO (1) WO2012150073A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107429647A (en) * 2015-04-15 2017-12-01 臼井国际产业株式会社 Gasoline direct rail

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19756102A1 (en) * 1997-12-17 1999-06-24 Bosch Gmbh Robert Mounting device for mounting fuel injectors
DE19853090A1 (en) * 1998-11-18 2000-05-25 Bosch Gmbh Robert Fuel injection system
DE19932699A1 (en) * 1999-07-15 2001-01-25 Itw Henschel Gmbh Fuel distributor strip for injection internal combustion engine has relief valve attached to distributor strip body; disc-shaped valve center part is mounted in holding part of outlet connector
EP1457663A2 (en) * 2003-03-13 2004-09-15 Visteon Global Technologies, Inc. Fuel rail system for an internal combustion engine
CN1536218A (en) * 2003-04-07 2004-10-13 ��ʽ�����װ Pipe joint structure and assembly method
DE102006020692A1 (en) * 2006-05-04 2007-11-08 Robert Bosch Gmbh Pressure control valve with emergency drive and ventilation function
CN101169087A (en) * 2007-11-27 2008-04-30 无锡威孚集团有限公司 Combined rail for high pressure co-rail system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008017151B3 (en) * 2008-04-03 2009-08-27 Continental Automotive Gmbh Fuel injection system for an internal combustion engine
CN201786519U (en) * 2010-09-20 2011-04-06 合肥恒信汽车发动机部件制造有限公司 Plastic dispenser for fuel oil

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19756102A1 (en) * 1997-12-17 1999-06-24 Bosch Gmbh Robert Mounting device for mounting fuel injectors
DE19853090A1 (en) * 1998-11-18 2000-05-25 Bosch Gmbh Robert Fuel injection system
DE19932699A1 (en) * 1999-07-15 2001-01-25 Itw Henschel Gmbh Fuel distributor strip for injection internal combustion engine has relief valve attached to distributor strip body; disc-shaped valve center part is mounted in holding part of outlet connector
EP1457663A2 (en) * 2003-03-13 2004-09-15 Visteon Global Technologies, Inc. Fuel rail system for an internal combustion engine
CN1536218A (en) * 2003-04-07 2004-10-13 ��ʽ�����װ Pipe joint structure and assembly method
DE102006020692A1 (en) * 2006-05-04 2007-11-08 Robert Bosch Gmbh Pressure control valve with emergency drive and ventilation function
CN101169087A (en) * 2007-11-27 2008-04-30 无锡威孚集团有限公司 Combined rail for high pressure co-rail system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107429647A (en) * 2015-04-15 2017-12-01 臼井国际产业株式会社 Gasoline direct rail

Also Published As

Publication number Publication date
DE102011075059A1 (en) 2012-11-08
EP2705240A1 (en) 2014-03-12
PL2705240T3 (en) 2017-10-31
CN103502624B (en) 2017-06-09
RU2013153134A (en) 2015-06-10
RU2601012C2 (en) 2016-10-27
EP2705240B1 (en) 2017-05-10
WO2012150073A1 (en) 2012-11-08

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