DE102018108364A1 - Fuel rail for an internal combustion engine, manufacturing method thereof and corresponding internal combustion engine - Google Patents

Fuel rail for an internal combustion engine, manufacturing method thereof and corresponding internal combustion engine Download PDF

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DE102018108364A1
DE102018108364A1 DE102018108364.5A DE102018108364A DE102018108364A1 DE 102018108364 A1 DE102018108364 A1 DE 102018108364A1 DE 102018108364 A DE102018108364 A DE 102018108364A DE 102018108364 A1 DE102018108364 A1 DE 102018108364A1
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Prior art keywords
fuel
tube
combustion engine
internal combustion
busbar
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Ceased
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DE102018108364.5A
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German (de)
Inventor
Frank Ickinger
Falk Heilfort
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Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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Priority to DE102018108364.5A priority Critical patent/DE102018108364A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y80/00—Products made by additive manufacturing
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/001—Pipes; Pipe joints
    • 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
    • F02M2200/28—Details of throttles in fuel-injection apparatus
    • 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
    • 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

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

Abstract

Die Erfindung stellt eine Kraftstoffsammelschiene (10) für einen Verbrennungsmotor mit den folgenden Merkmalen bereit: Die Kraftstoffsammelschiene (10) umfasst ein doppelwandiges Rohr (11), und das Rohr (11) ist additiv gefertigt.
Die Erfindung stellt ferner ein entsprechendes Herstellungsverfahren für eine Kraftstoffsammelschiene (10) sowie einen entsprechenden Verbrennungsmotor bereit.

Figure DE102018108364A1_0000
The invention provides a fuel rail (10) for an internal combustion engine having the following features: The fuel rail (10) comprises a double-walled tube (11) and the tube (11) is made additive.
The invention further provides a corresponding manufacturing method for a fuel rail (10) and a corresponding internal combustion engine.
Figure DE102018108364A1_0000

Description

Die vorliegende Erfindung betrifft eine Kraftstoffsammelschiene für einen Verbrennungsmotor. Die vorliegende Erfindung betrifft darüber hinaus ein entsprechendes Herstellungsverfahren für eine Kraftstoffsammelschiene sowie einen entsprechenden Verbrennungsmotor.The present invention relates to a fuel rail for an internal combustion engine. The present invention also relates to a corresponding manufacturing method for a fuel rail and a corresponding internal combustion engine.

Unter dem Begriff der Common-Rail- oder Speichereinspritzung werden in der Kraftfahrzeugtechnik Einspritzsysteme für Verbrennungsmotoren zusammengefasst, bei denen eine Hochdruckpumpe den Kraftstoff bei Motorbetrieb in ein Rohrleitungssystem presst. An diesem als Kraftstoffsammelschiene (rail) dienenden Verteilerrohr sind Einspritzdüsen (Injektoren) zur Versorgung der Zylinder mit Kraftstoff angeschlossen.In automotive engineering, the term "common rail" or "accumulator injection" combines injection systems for internal combustion engines, in which a high-pressure pump presses the fuel into a pipeline system during engine operation. In this serving as a fuel rail (rail) manifold injection nozzles (injectors) are connected to supply the cylinder with fuel.

Grundsätzlich bekannt ist es aus EP3086011 A1 , doppelwandige Kunststoffleitungen mittels additiver Herstellungsverfahren zu fertigen. EP 2962 790 A1 sowie DE 10 2010 050 000A1 schlagen zudem vor, doppelwandige Kraftstoffleitungen additiv zu fertigen. Weiterhin ist es aus DE 10 2016 210 391 A1 bekannt, eine Kraftstoffsammelschiene mittels eines generativen Fertigungsverfahrens herzustellen, wobei diese Rail aus Kunststoff bestehen kann.Basically it is known EP3086011 A1 to produce double-walled plastic pipes using additive manufacturing processes. EP 2962 790 A1 such as DE 10 2010 050 000A1 also suggest making additive double-walled fuel lines. It is still out DE 10 2016 210 391 A1 It is known to produce a fuel rail by means of a generative manufacturing process, which rail may be made of plastic.

Die Erfindung stellt eine Kraftstoffsammelschiene für einen Verbrennungsmotor, ein entsprechendes Herstellungsverfahren für eine Kraftstoffsammelschiene sowie einen entsprechenden Verbrennungs-, insbesondere Dieselmotor gemäß den unabhängigen Ansprüchen bereit.The invention provides a fuel rail for an internal combustion engine, a corresponding fuel rail production method, and a corresponding combustion engine, especially a diesel engine, according to the independent claims.

Ein Vorzug dieser Lösung liegt in der bauraumgerechten, funktionsintegrierten und strömungsoptimierten Konstruktion der erfindungsgemäßen Kraftstoffsammelschiene unter Entfall der bei herkömmlichen Einspritzsystemen unabdingbaren Lötprozesse.An advantage of this solution lies in the space-compatible, function-integrated and flow-optimized construction of the fuel rail according to the invention, with the elimination of the soldering processes which are indispensable in conventional injection systems.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den abhängigen Patentansprüchen angegeben. So kann das (doppelwandige) Rohr der Kraftstoffsammelschiene mit einem Pulver gefüllt werden. Durch diese einfache bauliche Maßnahme wird eine Dämpfung und Verbesserung der akustischen Eigenschaften erzielt, die insbesondere der Reduzierung mechanischer Geräusche durch die Injektoren oder aufgrund von Druckpulsationen dient.Further advantageous embodiments of the invention are specified in the dependent claims. Thus, the (double-walled) tube of the fuel rail can be filled with a powder. By means of this simple construction measure, damping and improvement of the acoustic properties are achieved, which in particular serve to reduce mechanical noises through the injectors or due to pressure pulsations.

Figurenlistelist of figures

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im Folgenden näher beschrieben.

  • 1 zeigt eine Rail mit Akustikdämpfung.
  • 2 zeigt eine Rail mit inneren Strukturen in Form von Drosseln.
  • 3 zeigt den Querschnitt eines Rohrsegmentes.
  • 4 zeigt eine Einzelheit des Querschnittes.
An embodiment of the invention is illustrated in the drawings and will be described in more detail below.
  • 1 shows a rail with acoustic damping.
  • 2 shows a rail with internal structures in the form of throttles.
  • 3 shows the cross section of a pipe segment.
  • 4 shows a detail of the cross section.

1 illustriert den grundlegenden Aufbau der vorgeschlagenen Kraftstoffsammelschiene (10), die sich durch ihr additiv gefertigtes, doppelwandiges Rohr (11), hier als Kunststoffrohr ausgebildet, auszeichnet. Zur Akustikdämpfung ist das Rohr (11) mit Pulver gefüllt. 1 illustrates the basic structure of the proposed fuel rail ( 10 ), which through their additively manufactured, double-walled tube ( 11 ), here designed as a plastic tube, characterized. For acoustic damping, the pipe ( 11 ) filled with powder.

Wie 2 erkennen lässt, weist das Rohr (11) innere Strukturen (12) zum Reduzieren von Druckpulsationen auf, die vorliegend als Drosseln wirken.As 2 indicates that the pipe ( 11 ) internal structures ( 12 ) for reducing pressure pulsations, which in the present case act as throttles.

3 zeigt anhand einer Darstellung des kreisrunden Rohrquerschnitts eine mögliche Struktur (21) zur Erhöhung der Wärmeübertragung durch Wasser, die hier entlang paralleler und äquidistant über den gesamten Querschnitt verteilter Kreissehnen verläuft. 3 shows a possible structure based on a representation of the circular tube cross section ( 21 ) for increasing the heat transfer through water, which runs here along parallel and equidistantly distributed over the entire cross section Kreissehnen.

Eine zweite Struktur (22) zur Erhöhung der Wärmeübertragung durch Luft durchzieht das Rohrsegment (20) im Wesentlichen achsparallel in Längsrichtung des Rohres und somit orthogonal zur ersten Struktur (21), wie 4 veranschaulicht.A second structure ( 22 ) to increase the heat transfer through air, the pipe segment ( 20 ) substantially parallel to the axis in the longitudinal direction of the tube and thus orthogonal to the first structure ( 21 ), as 4 illustrated.

ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Zitierte PatentliteraturCited patent literature

  • EP 3086011 A1 [0003]EP 3086011 A1 [0003]
  • EP 2962790 A1 [0003]EP 2962790 A1 [0003]
  • DE 102010050000 A1 [0003]DE 102010050000 A1 [0003]
  • DE 102016210391 A1 [0003]DE 102016210391 A1 [0003]

Claims (11)

Kraftstoffsammelschiene (10) für einen Verbrennungsmotor, gekennzeichnet durch folgende Merkmale: - die Kraftstoffsammelschiene (10) umfasst ein doppelwandiges Rohr (11) und - das Rohr (11) ist additiv gefertigt.Fuel rail (10) for an internal combustion engine, characterized by the following features: - The fuel rail (10) comprises a double-walled tube (11) and - the tube (11) is made additive. Kraftstoffsammelschiene (10) nach Anspruch 1, dadurch gekennzeichnet, dass das Rohr (11) aus Kunststoff, Edelstahl oder Metall besteht.Fuel busbar (10) after Claim 1 , characterized in that the tube (11) made of plastic, stainless steel or metal. Kraftstoffsammelschiene (10) nach Anspruch 1 oder 2, gekennzeichnet durch folgendes Merkmal: - das Rohr (11) ist mit einem Pulver gefüllt.Fuel busbar (10) after Claim 1 or 2 characterized by the following feature: - the tube (11) is filled with a powder. Kraftstoffsammelschiene (10) nach Anspruch 1 bis 3, gekennzeichnet durch folgendes Merkmal: - das Rohr (11) weist innere Strukturen (12) zum Reduzieren von Druckpulsationen auf.Fuel busbar (10) after Claim 1 to 3 characterized by the following feature: the tube (11) has internal structures (12) for reducing pressure pulsations. Kraftstoffsammelschiene (10) nach Anspruch 4, gekennzeichnet durch folgendes Merkmal: - die Strukturen (12) umfassen Drosseln.Fuel busbar (10) after Claim 4 characterized by the following feature: the structures (12) comprise chokes. Kraftstoffsammelschiene (10) nach einem der Ansprüche 1 bis 5, gekennzeichnet durch folgendes Merkmal: - das Rohr (11) umfasst mindestens ein Rohrsegment (20) mit einer ersten Struktur (21) zum Erhöhen einer Wärmeübertragung durch Wasser.Fuel bus (10) after one of Claims 1 to 5 characterized by the following feature: the tube (11) comprises at least one tube segment (20) having a first structure (21) for increasing heat transfer through water. Kraftstoffsammelschiene (10) nach Anspruch 6, gekennzeichnet durch folgendes Merkmal: - das Rohrsegment (20) weist ferner eine zweite Struktur (22) zum Erhöhen der Wärmeübertragung durch Luft auf.Fuel busbar (10) after Claim 6 characterized by the following feature: the tube segment (20) further comprises a second structure (22) for increasing the heat transfer by air. Kraftstoffsammelschiene (10) nach Anspruch 7, gekennzeichnet durch folgende Merkmale: - das Rohrsegment (20) weist einen kreisrunden Querschnitt auf und - die erste Struktur verläuft entlang paralleler Kreissehnen des Querschnitts.Fuel busbar (10) after Claim 7 , characterized by the following features: - the tube segment (20) has a circular cross-section and - the first structure runs along parallel chords of the cross-section. Kraftstoffsammelschiene (10) nach Anspruch 8, gekennzeichnet durch folgendes Merkmal: - die zweite Struktur verläuft rechtwinklig zur ersten Struktur längs zum Rohrsegment (20).Fuel busbar (10) after Claim 8 characterized by the following feature: the second structure extends at right angles to the first structure along the tube segment (20). Herstellungsverfahren für eine Kraftstoffsammelschiene (10), gekennzeichnet durch folgendes Merkmal: - das Herstellungsverfahren umfasst das additive Fertigen eines doppelwandigen Rohres (11).Manufacturing method for a fuel rail (10), characterized by the following feature: - the manufacturing method comprises the additive manufacturing of a double-walled pipe (11). Verbrennungsmotor mit einer Kraftstoffsammelschiene (10) nach einem der Ansprüche 1 bis 9.Internal combustion engine with a fuel rail (10) according to one of Claims 1 to 9 ,
DE102018108364.5A 2018-04-09 2018-04-09 Fuel rail for an internal combustion engine, manufacturing method thereof and corresponding internal combustion engine Ceased DE102018108364A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020122503B3 (en) 2020-08-28 2021-12-23 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Fuel injection system for fuel-water injection for an internal combustion engine

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4674542A (en) * 1984-03-16 1987-06-23 Ugine Gueugnon S.A. Double-wall welded tube
US6405712B1 (en) * 1999-03-12 2002-06-18 Keihin Corporation Fuel distribution pipe in fuel injection apparatus
EP1457664A1 (en) * 2003-03-07 2004-09-15 Renault s.a.s. Method and Apparatus to process Pressure Interactions between Succesive Injections in a Common Rail Fuel Injection System
JP2005337119A (en) * 2004-05-27 2005-12-08 Mazda Motor Corp Fuel pipe structure for engine
DE102010050000A1 (en) 2010-11-02 2012-05-03 Eads Deutschland Gmbh Fuel line in an aircraft
EP2962790A1 (en) 2014-07-03 2016-01-06 United Technologies Corporation Additive manufactured tube assembly
EP3086011A1 (en) 2015-04-21 2016-10-26 Airbus Operations GmbH Double-walled pipe with integrated heating capability for an aircraft or spacecraft
DE102016209423A1 (en) * 2016-05-31 2017-11-30 Robert Bosch Gmbh High-pressure accumulator and method for producing a high-pressure accumulator
DE102016210391A1 (en) 2016-06-13 2017-12-14 Hirschvogel Umformtechnik Gmbh Compressed component and method for its production

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4674542A (en) * 1984-03-16 1987-06-23 Ugine Gueugnon S.A. Double-wall welded tube
US6405712B1 (en) * 1999-03-12 2002-06-18 Keihin Corporation Fuel distribution pipe in fuel injection apparatus
EP1457664A1 (en) * 2003-03-07 2004-09-15 Renault s.a.s. Method and Apparatus to process Pressure Interactions between Succesive Injections in a Common Rail Fuel Injection System
JP2005337119A (en) * 2004-05-27 2005-12-08 Mazda Motor Corp Fuel pipe structure for engine
DE102010050000A1 (en) 2010-11-02 2012-05-03 Eads Deutschland Gmbh Fuel line in an aircraft
EP2962790A1 (en) 2014-07-03 2016-01-06 United Technologies Corporation Additive manufactured tube assembly
EP3086011A1 (en) 2015-04-21 2016-10-26 Airbus Operations GmbH Double-walled pipe with integrated heating capability for an aircraft or spacecraft
DE102016209423A1 (en) * 2016-05-31 2017-11-30 Robert Bosch Gmbh High-pressure accumulator and method for producing a high-pressure accumulator
DE102016210391A1 (en) 2016-06-13 2017-12-14 Hirschvogel Umformtechnik Gmbh Compressed component and method for its production

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020122503B3 (en) 2020-08-28 2021-12-23 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Fuel injection system for fuel-water injection for an internal combustion engine

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