EP2776700B1 - Brennstoffverteiler - Google Patents

Brennstoffverteiler Download PDF

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Publication number
EP2776700B1
EP2776700B1 EP12770472.4A EP12770472A EP2776700B1 EP 2776700 B1 EP2776700 B1 EP 2776700B1 EP 12770472 A EP12770472 A EP 12770472A EP 2776700 B1 EP2776700 B1 EP 2776700B1
Authority
EP
European Patent Office
Prior art keywords
main body
fuel
holder
tubular main
fastening point
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.)
Not-in-force
Application number
EP12770472.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2776700A1 (de
Inventor
Martin Maier
Martin GOEHNER
Markus Feigl
Helmut Schneider
Nikolaus Hautmann
Dietmar Uhlenbrock
Holger UHRIG
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
Priority to PL12770472T priority Critical patent/PL2776700T3/pl
Publication of EP2776700A1 publication Critical patent/EP2776700A1/de
Application granted granted Critical
Publication of EP2776700B1 publication Critical patent/EP2776700B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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

Definitions

  • the invention relates to a fuel distributor, which is used in particular for fuel injection systems of mixture-compressing, spark-ignited internal combustion engines.
  • the invention relates to the field of fuel injection systems designed as medium-pressure systems.
  • a fuel rail used for high pressure steel or aluminum applications may be used.
  • a compressive strength for pressures of, for example, 20 MPa (200 bar) can be achieved.
  • this massive design of the suitable for high pressure applications Rails is associated with high production costs.
  • fuel rail assemblies may be used for low pressure applications at 0.3 MPa (3 bar) to 0.5 MPa (5 bar) for related applications.
  • thin-walled steel pipes or plastic pipes made of PA or PPS can be used to produce the fuel rail.
  • a steel tube can serve as a base to which the individual components, such as caps, screw-on holders, high-pressure connection and the interfaces to the injection valves, are soldered.
  • the existing high-pressure steel rail is mounted on a cylinder head of an internal combustion engine, which usually off Aluminum is made.
  • the engine heats up during operation, there are tensions in the high-pressure rail, as the aluminum cylinder head stretches more than the steel pipe of the high-pressure rail.
  • the wall thickness must therefore be designed relatively thick-walled, since both the internal pressure and the elongation must be absorbed.
  • such an embodiment of the high-pressure rail is expensive to manufacture.
  • a high-pressure rail is usually expensive.
  • a drawn pipe must be cut to size, the ends machined, and outlets drilled.
  • the interfaces to the injection valve and the holder are usually made of post-processed steel castings or small assembly or deep drawn parts.
  • the connection caps can be configured as turned or deep-drawn parts, while the high-pressure connections are turned parts.
  • the attachments must then be fixed. The result is a very costly manufacturing process with many steps.
  • a fuel injection device for a multi-cylinder internal combustion engine which has at least one high pressure pump and one injector for each cylinder of the internal combustion engine.
  • Each injector is connected via a hydraulic line at least indirectly to the at least one high-pressure pump and / or at least to the injector of another cylinder of the internal combustion engine.
  • the length of the hydraulic line between the at least one high pressure pump and the closest injector and / or between two adjacent injectors is greater than the distance between the at least one high pressure pump and the nearest injector and / or greater than the distance between two adjacent injectors.
  • the hydraulic line is repeatedly curved or kinked.
  • the fuel distributor according to the invention with the features of claim 1 has the advantage that an embodiment and a manufacturability are improved. Specifically, a suitable for the desired pressure, in particular a medium pressure, fuel distributor can be created with relatively low production costs. The cost of materials required in terms of compressive strength can be reduced here.
  • the tubular base body has exactly one arc between the first attachment point and the second attachment point. Especially in a multi-part design of the tubular body in this case a production of a small number of parts is possible, which also reduces the number of joints.
  • first holder is connected via a first connector at the first attachment point with the tubular body
  • second holder is connected via a second connector at the second attachment point with the tubular body that a formed first fuel channel which opens from a fuel chamber of the tubular body in an interior of the first holder, and in that a second fuel channel is formed, which opens from the fuel space of the tubular body in an interior of the second holder.
  • each matching through holes can be configured in the tubular body at the attachment points and on the connecting pieces. Such through holes can be performed to increase the overall strength and oval or as a slot.
  • the fuel channels are therefore not necessarily formed with a circular cross-section.
  • the connectors also allow for the particular application adapted attachment of the tubular body.
  • the tubular base body with respect to a mounting position on the connector or laterally located on the connector.
  • an arrangement of the tubular body is preferably chosen, which arranges this higher than the holder.
  • the tubular body does not necessarily lie in a plane above the holders, which is parallel to an upper surface of a cylinder head.
  • a first cup is provided, which is partially inserted into the interior of the first connector, and that a second cup is provided, which is partially inserted into the interior of the second connector.
  • Fuel injection valves of the fuel injection system can then be attached to the cups.
  • fuel from the fuel chamber of the tubular base body can be guided via the connecting pieces in the fuel injection valves.
  • changes in length of the cylinder head so changes in the distances between the fuel injection valves, can then be compensated by the design of the tubular body.
  • the tubular base body is configured as a meandering curved tubular body and / or in that one or more further holders are provided, which are connected at one or more fastening points of the tubular base body at least indirectly to the tubular base body.
  • an embodiment can be realized which has a corresponding number of holders with respect to the number of injection valves, wherein a length compensation is made possible by the meander-shaped configuration of the tubular base body.
  • Fig. 1 shows a fuel distributor 1 in a schematic, spatial representation according to a first non-inventive example.
  • the fuel distributor 1 can be used in particular for fuel injection systems of mixture-compression, spark-ignited internal combustion engines. specially the fuel distributor 1 is suitable for a medium-pressure system.
  • the mean pressure for such a medium-pressure system can be in the range of 3 MPa to 10 MPa or 30 bar to 100 bar. In particular, the mean pressure may be in the range of 5 MPa to 7 MPa or 50 bar to 70 bar.
  • the fuel distributor 1 according to the invention is also suitable for other applications.
  • the fuel distributor 1 has a tubular main body 2.
  • the tubular base body 2 comprises a straight piece 3, a first sheet 4, a second sheet 5 and a third sheet 6.
  • the tubular base body 2 more sheets on, for the sake of simplicity of illustration, only the sheets 4 to 6 are marked.
  • the fuel distributor 1 also has a first holder 7 and a second holder 8.
  • the first holder 7 is connected via a first connecting piece 9 at a first attachment point 10 with the tubular base body 2.
  • the first connector 9 is connected to the straight piece 3.
  • the second holder 8 is connected via a second connecting piece 11 at a second attachment point 12 with the tubular base body 2.
  • the first sheet 4, the second sheet 5 and the third sheet 6 are arranged between the first attachment point 10 and the second attachment point 12. Between the attachment points 10, 12, no further holder with the tubular body 2 are connected. However, further holders 13, 14 are provided, which are connected via connecting pieces 15, 16 with the tubular base body 2.
  • the fuel distributor 1 also has a first cup 20, a second cup 21 and further cups 22, 23.
  • the first cup 20 is connected to the first connector 9.
  • the second cup 21 is connected to the second connector 11.
  • the other cups 22, 23 are connected to the connecting pieces 15, 16.
  • On the cups 20 to 23 are Fuel injection valves of a fuel injection system with the fuel distributor 1 connectable.
  • the distances between the holders 7, 8, 13, 14 or the connecting pieces 9, 11, 15, 16 are determined by the geometry of the internal combustion engine, in particular a cylinder head.
  • the tubular base body 2 is preferably made of a steel for reasons of strength.
  • changes in temperature then result in relative changes in length which can lead to stresses in the tubular main body 2 of the fuel distributor 1.
  • the sheets 4, 5, 6, for example, between the holders 7, 8 or connecting pieces 9, 11 by a certain elasticity allows a length compensation. As a result, the mechanical load of the tubular body 2 is reduced.
  • the configuration of the fuel distributor 1 is described below with reference to FIGS Fig. 2 described.
  • Fig. 2 shows the in Fig. 1 shown fuel distributor 1 in a partial, schematic sectional view.
  • the tubular base body 2 has a wall thickness 25. Since a length compensation is made possible by means of the sheets 4 to 6 of the tubular basic body 2, the mechanical load of the tubular basic body 2 is essentially due to the fuel pressure of a fuel in the fuel chamber (inner space) 26 of the tubular base body 2. Thus, the wall thickness 25 can be reduced , In the fuel chamber 26 can be performed during operation via a hydraulic port 27 fuel.
  • the hydraulic port 27 is connected to the tubular body 2. Between the fuel chamber 26 in the interior of the tubular base body 2 and an inner space 29 of the first connecting piece 9, a first fuel channel 28 is formed.
  • the first fuel channel 28 may have a circular cross-section. To increase the strength, the cross section of the first fuel channel 28 However, also be executed oval or as a slot.
  • a corresponding second fuel channel is formed between the tubular base body 2 and the second connecting piece 11. Via the second fuel channel of the fuel chamber 26 is connected to an interior of the second connector 11.
  • the inner space 29 of the connecting piece 9 leads into an inner space 30 of the first holder 7.
  • the cup 20 is inserted into the inner space 30 of the first holder 7.
  • the fuel from the fuel chamber 26 via the interior 29 of the connector 9 and the interior 30 of the first holder 7 can be performed to the mountable to the first cup 20 fuel injection valve.
  • the second sheet 5 is disposed between the first sheet 4 and the third sheet 6, wherein the first sheet 4 and the third sheet 6 are bent in the same direction.
  • the second sheet 5 is bent in opposite directions to the first sheet 4. This results in a meander-shaped configuration of the tubular main body 2.
  • the tubular base body 2 is in an installed position directly on the connecting piece 15.
  • the tubular base body 2 can also be arranged laterally above and below.
  • the tubular base body 2 can be installed suitably rotated about a longitudinal axis by a large angle. As a result, a version compatible with different installation spaces is possible.
  • the cup 20 is inserted into the holder 7.
  • the holder 7 is in turn inserted into the connector 9. This results in a positive connection.
  • the individual parts of the tubular base body 2 can be stapled in a joining process and soldered. Accordingly, a connection of the remaining elements of the fuel distributor 1 is possible.
  • the holder 7 has a bore 31 to allow screwing to the cylinder head.
  • the attachment of the Fuel injector on the cup 20 can be made for example via an O-ring.
  • Fig. 3 shows a partial, schematic representation of a fuel distributor 1 for illustrating a second example not according to the invention.
  • the tubular base body 2 has in this embodiment, a first sheet 4 and a second sheet 5, which are bent in opposite directions to each other.
  • straight pieces 3, 35, 36 are provided.
  • the straight piece 3, the first sheet 4, the straight piece 35, the second sheet 5, the straight piece 36 and other elements are successively assembled to the tubular base body 2.
  • the straight piece 35 is located between the sheets 4, 5.
  • only two sheets 4, 5 and the straight piece 35 are provided.
  • the straight pieces 3, 35, 36 each have a non-vanishing angle to a longitudinal axis of installation 37 of the tubular base body 2.
  • the tubular base body 2 meanders around the installation longitudinal axis 37 and reaches the installation longitudinal axis 37 in each case in the cups 20, 21, which are connected to the holders 7, 8.
  • Fig. 4 shows a partial, schematic representation of the fuel distributor 1 to illustrate an embodiment of the invention according to the invention.
  • the tubular base body 2 between the holders 7, 8 or attachment points 10, 12 only a sheet 4.
  • the sheet 4 is formed in this embodiment as half pipe bend 4. As a result, a high degree of flexibility along the installation longitudinal axis 37 is achieved in order to enable a length compensation.
  • a horizontal installation that is, an arrangement of the tubular Base body 2 in a plane parallel to an upper side of the cylinder head, advantageous.
  • An occurring during operation length change along the installation longitudinal axis 37 may, for example, in the range of a few hundredths of a millimeter. Due to the meander-shaped configuration of the tubular base body 2, such elongations can be absorbed. Here, in each case adapted to the application embodiments are possible, so that the respective constructive solution can be adapted to the limited and individual engine different available space. Here, the wall thickness (wall thickness) 25 can be significantly reduced. This reduces the manufacturing costs and the weight of the component. As with a rail body, which consists of a straight tube, can be achieved by the meander-shaped configuration a convenient, centrally located below the tubular body 2 arrangement of the holder 7, 8, 13, 14. In addition, identical parts can be used in the production.
  • the basic geometry of the tubular body 2 can be adapted to different engines with little effort. For example, the bends of the sheets 4-6 can be adjusted. The type of pipe bends and the bores 31 to the injectors are then indeed engine-individual, but can be made on the same pipe bending machine and in the same drilling center. The resulting significantly larger quantities result in a further cost reduction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP12770472.4A 2011-11-11 2012-10-04 Brennstoffverteiler Not-in-force EP2776700B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12770472T PL2776700T3 (pl) 2011-11-11 2012-10-04 Rozdzielacz paliwa

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011086209A DE102011086209A1 (de) 2011-11-11 2011-11-11 Brennstoffverteiler
PCT/EP2012/069555 WO2013068180A1 (de) 2011-11-11 2012-10-04 Brennstoffverteiler

Publications (2)

Publication Number Publication Date
EP2776700A1 EP2776700A1 (de) 2014-09-17
EP2776700B1 true EP2776700B1 (de) 2018-06-06

Family

ID=47010579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12770472.4A Not-in-force EP2776700B1 (de) 2011-11-11 2012-10-04 Brennstoffverteiler

Country Status (9)

Country Link
US (1) US20150136084A1 (zh)
EP (1) EP2776700B1 (zh)
KR (1) KR20140088558A (zh)
CN (1) CN103946533B (zh)
BR (1) BR112014011377A2 (zh)
DE (1) DE102011086209A1 (zh)
IN (1) IN2014CN03357A (zh)
PL (1) PL2776700T3 (zh)
WO (1) WO2013068180A1 (zh)

Families Citing this family (9)

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Publication number Priority date Publication date Assignee Title
JP6514553B2 (ja) * 2014-06-18 2019-05-15 マルヤス工業株式会社 直噴エンジン用高圧燃料デリバリパイプアセンブリ
WO2016079004A1 (en) * 2014-11-19 2016-05-26 Continental Automotive Gmbh Fuel rail assembly for an internal combustion engine
EP3121433B1 (en) 2015-07-23 2019-05-08 Continental Automotive GmbH Fuel rail assembly for an internal combustion engine
DE202015105989U1 (de) * 2015-11-09 2015-12-02 Benteler Automobiltechnik Gmbh Kraftstoffverteiler
DE102015226807A1 (de) * 2015-12-29 2017-06-29 Robert Bosch Gmbh Komponente für Brennstoffeinspritzanlage und Verfahren zum Herstellen einer Komponente einer Brennstoffeinspritzanlage
DE102017205691A1 (de) * 2017-04-04 2018-10-04 Robert Bosch Gmbh Kraftstoff-Hochdruckspeicher
CN111433450B (zh) * 2017-12-08 2022-01-28 沃尔沃卡车集团 用于共轨燃料喷射系统的装置
JP2019138240A (ja) * 2018-02-13 2019-08-22 トヨタ自動車株式会社 燃料配管
DE102020128607A1 (de) * 2020-10-30 2022-05-05 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Herstellung einer Brennstoffleiste für ein Druckbehältersystem, Brennstoffleiste, Druckbehältersystem und Kraftfahrzeug

Citations (1)

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Publication number Priority date Publication date Assignee Title
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Also Published As

Publication number Publication date
CN103946533B (zh) 2016-11-09
WO2013068180A1 (de) 2013-05-16
DE102011086209A1 (de) 2013-05-16
KR20140088558A (ko) 2014-07-10
IN2014CN03357A (zh) 2015-07-03
US20150136084A1 (en) 2015-05-21
PL2776700T3 (pl) 2018-10-31
CN103946533A (zh) 2014-07-23
EP2776700A1 (de) 2014-09-17
BR112014011377A2 (pt) 2017-06-06

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