EP0625637A1 - Sammelleitung für eine Kraftstoffversorgungseinrichtung einer Brennkraftmaschine - Google Patents
Sammelleitung für eine Kraftstoffversorgungseinrichtung einer Brennkraftmaschine Download PDFInfo
- Publication number
- EP0625637A1 EP0625637A1 EP94107598A EP94107598A EP0625637A1 EP 0625637 A1 EP0625637 A1 EP 0625637A1 EP 94107598 A EP94107598 A EP 94107598A EP 94107598 A EP94107598 A EP 94107598A EP 0625637 A1 EP0625637 A1 EP 0625637A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipe
- manifold
- fact
- central portion
- axial end
- 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.)
- Withdrawn
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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
- 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 present invention relates to a manifold for an internal combustion engine fuel supply device, and in particular to a manifold for supplying pressurized fuel to a number of fuel metering and atomizing valves.
- Manifolds of the above type normally comprise a first tubular body with a number of fittings for the valves; and a second tubular body housed coaxially inside the first body so as to define, between the first and second bodies, an annular conduit for supplying fuel to the fittings.
- the first and second bodies are closed at a first axial end by a pressure regulator for maintaining the fuel pressure in the supply conduit below a given value, and at a second axial end by cap in which are formed a first duct between the fuel tank and the annular supply conduit, and a second duct between the second tubular body and the tank.
- the second duct is formed in the first tubular body, at the pressure regulator seat.
- Manifolds of the aforementioned type present several drawbacks, foremost of which is the fact that delivery and drainage of the fuel are defined at one axial end of the manifold, which, in addition to limiting assembly of the manifold, also results in greater length and in difficulties in hydraulically connecting the manifold and tank. Moreover, the sealing efficiency of the ducts formed in the cap or close to the pressure regulator is invariably reduced with time, thus resulting in fuel leakage.
- a manifold for an internal combustion engine fuel supply device comprising a first tubular body with a number of fittings for fuel metering and atomizing valves; a second body housed inside said first body so as to define, with said first body, a conduit for supplying fuel to said fittings; a wall for closing a first axial end of said first body; and a pressure regulator mounted so as to close a second axial end of said first body and a first axial end of said second body; characterized by the fact that said second body comprises: a first pipe extending from a central portion of said first body to said wall; a fuel inlet for said first pipe, defined in said central portion of said first body; a hydraulic passage defined, close to said wall, between a first axial end of said first pipe and said conduit; a second pipe extending from said central portion of said first body to said pressure regulator, a portion of which closes a first axial end of said second pipe; and a fuel outlet for said second pipe, defined in
- Manifold 1 comprises a tubular body 2 with a longitudinal axis A and a number of fittings 3 for known fuel metering and atomizing valves (not shown); and a second, externally cylindrical, body 4 housed substantially coaxially inside first body 2 so as to define, with first body 2, an annular conduit 5 defined by the respective inner and outer surfaces of bodies 2 and 4, and communicating with fittings 3 for supplying fuel to said valves.
- Body 2 is closed at a first axial end by a member consisting of a known pressure regulator 7, and at a second axial end by a wall 6.
- Pressure regulator 7 is mounted so as to close said first axial end of body 2 and a first axial end of body 4; provides for maintaining the fuel pressure in conduit 5 within a given range; and presents a spring by which it is locked to body 2.
- Body 4 is formed in one piece, and presents: a solid central portion 11 in the central portion of body 2; a first pipe 12 extending from a first side of central portion 11 to wall 6 where a first axial end of pipe 12 is engaged internally by a cylindrical projection 9 extending from wall 6; an inlet 13 for pipe 12, defined between a second axial end of pipe 12 and central portion 11; a number of through slots 14 formed close to the first axial end of pipe 12, for hydraulically connecting pipe 12 and conduit 5; a second pipe 15 extending from a second side, opposite the first, of central portion 11 to pressure regulator 7, a component part of which closes a first axial end of pipe 15; and an outlet 16 for pipe 15, defined between a second axial end of pipe 15 and central portion 11.
- Manifold 1 also comprises: tabs 29 along conduit 5, for centering pipes 12 and 15 in a given position in relation to body 2; a first hydraulic joint 17 having a first portion 19 fitted in sealed manner to inlet 13; and a second portion 20, outside body 2, for supporting one end of a pipe 18 from the tank; and a second hydraulic joint 21 having a first portion 23 fitted in sealed manner to outlet 16; and a second portion 24, outside body 2, for supporting one end of a pipe 22 to the tank.
- the central portion of body 2 presents two threaded holes 25, one engaged by a central, externally threaded portion 26 of joint 17, and the other engaged by a central, externally threaded portion 27 of joint 21.
- pipes 12 and 15 are coaxial with each other, and present substantially the same length and diameter; and the longitudinal axes B and C of joints 17 and 21 (and hence holes 25) are perpendicular to axis A and lie in the same plane.
- Bodies 2 and 4 may be made of metal, preferably rheocast aluminium, or plastic; and body 2 is formed, preferably pressed, in one piece with wall 6.
- Manifold 1 is assembled by first inserting body 4 inside body 2 so that the axial end of pipe 12 is engaged by projection 9, in which position, inlet 13 and outlet 16 are coaxial with holes 25. This is followed by assembly of pressure regulator 7 which closes and seals body 2, and a portion of which engages said first axial end of pipe 15. Finally, joints 17 and 21 are assembled by screwing respective central portions 26 and 27 inside holes 25.
- the manifold according to the present invention provides for troublefree assembly inside the engine compartment, for reducing overall axial size, and for troublefree hydraulic connection of the manifold and pipes 18 and 22. Moreover, it provides for incorporating the fuel delivery and recirculating pipes in one body; and for simplifying manufacture of body 2 by eliminating the cap opposite pressure regulator 7. From the functional standpoint, the path along which the fuel is fed provides for flushing and so preventing deposits from accumulating in the portion of body 2 close to wall 6. Finally, the manifold according to the present invention provides for more reliable hydraulic sealing, thus greatly reducing the risk of fuel leakage.
- pipes 12 and 15 may be of different lengths, and need not necessarily be coaxial; fuel passage from pipe 12 to conduit 5 may be enabled by means of recesses formed at said first end of pipe 12, or by forming pipe 12 of such a length as to allow a given clearance between the first axial end of pipe 12 and wall 6; joints 17 and 21 may be offset, i.e. holes 25 may present respective axes in different planes; the distance between joints 17 and 21 (and hence between holes 25) may be other than as shown; and body 4 and/or body 2 may be formed in a number of, preferably modular, parts.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITBO930109 IT232907Y1 (it) | 1993-05-17 | 1993-05-17 | collettore per un dispositivo di alimentazione di carburante ad un motore a combustione interna. |
ITBO930109U | 1993-05-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0625637A1 true EP0625637A1 (de) | 1994-11-23 |
Family
ID=11338827
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94107598A Withdrawn EP0625637A1 (de) | 1993-05-17 | 1994-05-16 | Sammelleitung für eine Kraftstoffversorgungseinrichtung einer Brennkraftmaschine |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0625637A1 (de) |
IT (1) | IT232907Y1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0826873A2 (de) * | 1996-08-24 | 1998-03-04 | Volkswagen Aktiengesellschaft | Einrichtung zur Verteilung von Kraftstoff für eine Brennkraftmaschine |
DE19747736C1 (de) * | 1997-10-29 | 1999-04-08 | Siemens Ag | Druckspeicher für Kraftstoffversorgungssysteme |
DE10055675A1 (de) * | 2000-11-10 | 2002-05-16 | Volkswagen Ag | Einrichtung zur Verteilung von Kraftstoff für eine Brennktaftmaschine |
EP2530294A1 (de) * | 2011-05-31 | 2012-12-05 | Caterpillar Motoren GmbH & Co. KG | Doppelwandiges Kraftstoffversorgungsleitungselement |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3728576A1 (de) * | 1987-08-27 | 1989-03-09 | Opel Adam Ag | Kraftstoffeinspritzanlage |
US4955409A (en) * | 1988-04-18 | 1990-09-11 | Suzuki Jidosha Kogyo Kabushiki Kaisha | Fuel supply system |
EP0403871A1 (de) * | 1989-06-13 | 1990-12-27 | WEBER S.r.l. | Brennstoffsammelleitung, vorzugsweise aus Kunststoff, zur Brennstoffversorgung der Injektoren eines Brennstoffeinspritzsystems eines Verbrennungsmotors |
EP0508074A1 (de) * | 1991-04-12 | 1992-10-14 | Robert Bosch Gmbh | Brennstoffverteiler |
-
1993
- 1993-05-17 IT ITBO930109 patent/IT232907Y1/it active IP Right Grant
-
1994
- 1994-05-16 EP EP94107598A patent/EP0625637A1/de not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3728576A1 (de) * | 1987-08-27 | 1989-03-09 | Opel Adam Ag | Kraftstoffeinspritzanlage |
US4955409A (en) * | 1988-04-18 | 1990-09-11 | Suzuki Jidosha Kogyo Kabushiki Kaisha | Fuel supply system |
EP0403871A1 (de) * | 1989-06-13 | 1990-12-27 | WEBER S.r.l. | Brennstoffsammelleitung, vorzugsweise aus Kunststoff, zur Brennstoffversorgung der Injektoren eines Brennstoffeinspritzsystems eines Verbrennungsmotors |
EP0508074A1 (de) * | 1991-04-12 | 1992-10-14 | Robert Bosch Gmbh | Brennstoffverteiler |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0826873A2 (de) * | 1996-08-24 | 1998-03-04 | Volkswagen Aktiengesellschaft | Einrichtung zur Verteilung von Kraftstoff für eine Brennkraftmaschine |
EP0826873A3 (de) * | 1996-08-24 | 1998-06-03 | Volkswagen Aktiengesellschaft | Einrichtung zur Verteilung von Kraftstoff für eine Brennkraftmaschine |
US5803051A (en) * | 1996-08-24 | 1998-09-08 | Volkswagen Ag | Fuel distribution arrangement for an internal combustion engine |
DE19747736C1 (de) * | 1997-10-29 | 1999-04-08 | Siemens Ag | Druckspeicher für Kraftstoffversorgungssysteme |
US6276336B1 (en) | 1997-10-29 | 2001-08-21 | Siemens Aktiengesellschaft | Pressure reservoir for fuel supply systems |
DE10055675A1 (de) * | 2000-11-10 | 2002-05-16 | Volkswagen Ag | Einrichtung zur Verteilung von Kraftstoff für eine Brennktaftmaschine |
EP2530294A1 (de) * | 2011-05-31 | 2012-12-05 | Caterpillar Motoren GmbH & Co. KG | Doppelwandiges Kraftstoffversorgungsleitungselement |
WO2012163462A1 (en) * | 2011-05-31 | 2012-12-06 | Caterpillar Motoren Gmbh & Co. Kg | Double-walled fuel supply line element |
KR20140045959A (ko) * | 2011-05-31 | 2014-04-17 | 캐터필라 모토렌 게엠베하 운트 코. 카게 | 이중벽 연료 공급 라인 요소 |
KR101990652B1 (ko) | 2011-05-31 | 2019-09-30 | 캐터필라 모토렌 게엠베하 운트 코. 카게 | 이중벽 연료 공급 라인 요소 |
Also Published As
Publication number | Publication date |
---|---|
ITBO930109U1 (it) | 1994-11-17 |
ITBO930109V0 (it) | 1993-05-17 |
IT232907Y1 (it) | 2000-01-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB |
|
17P | Request for examination filed |
Effective date: 19950224 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: MAGNETI MARELLI S.P.A. |
|
17Q | First examination report despatched |
Effective date: 19960326 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19960806 |