EP0826873B1 - Einrichtung zur Verteilung von Kraftstoff für eine Brennkraftmaschine - Google Patents
Einrichtung zur Verteilung von Kraftstoff für eine Brennkraftmaschine Download PDFInfo
- Publication number
- EP0826873B1 EP0826873B1 EP97114010A EP97114010A EP0826873B1 EP 0826873 B1 EP0826873 B1 EP 0826873B1 EP 97114010 A EP97114010 A EP 97114010A EP 97114010 A EP97114010 A EP 97114010A EP 0826873 B1 EP0826873 B1 EP 0826873B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- cylinder head
- combustion engine
- supports
- internal combustion
- 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.)
- Expired - Lifetime
Links
Images
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
- F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
-
- 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
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0606—Fuel temperature
Definitions
- the invention relates to a device for distributing fuel for a cylinder head Provided internal combustion engine according to the preamble of claim 1.
- Such a device is known from DE-39 05 254 A1.
- This facility instructs separately held on a cylinder head or on intake manifolds in which the transversely extending injection valves are arranged.
- the housing also contains one fuel supply channel, which is connected to the injection valves via cross bores is.
- a separate cooling air blower conveys a steady flow of cooling air through it Housing, which essentially cools the injectors.
- This facility among other things, the task is based on the cooling effect to be achieved with regard to all Injectors to equalize. This should be achieved in that the entire Cooling air flow is led to all injectors, d. H. at one end of the case inserted through the blower and discharged at the opposite end.
- So-called fuel rail for a variety of documents Internal combustion engines have become known. These are usually the suction pipes of the Assigned to the internal combustion engine and have a central feed point for fuel, a fuel pressure regulator and a fuel return and are with separate outlets provided for the individual injectors.
- a central feed point for fuel being located approximately in the middle is present. This feeds the fuel into an inner tube which is pushed into an outer tube is provided at the end with cross holes through which the internally guided fuel into one can flow coaxially lying outer cavity. This is across the cross piece with the individual injectors connected.
- the inner tube is limited by itself axially extending ribs held in the outer tube.
- Such facilities are primarily for the purpose of a modular, preassembled and space-saving The arrangement created and does not deal with any aspects of fuel cooling or equalization the fuel temperature. This is also not necessary for such facilities. since, as already mentioned, they are freely arranged in the engine compartment.
- the invention is therefore based on the object of a device for distributing fuel for to provide an internal combustion engine provided with a cylinder head, which an equalization the temperatures of the fuel flows supplied to the individual injectors and also lowers the overall temperature level of the fuel.
- a reduction in the overall temperature level is already achieved in that the Fuel initially separated by the use within the inlet channel and thus before the direct heat radiation protected by the cylinder head flows.
- Optimization of the equalization and cooling can be done by tuning the Cross sections of the inlet channel, the coaxial cavity and the connecting lines to the injectors.
- the features according to the invention provide further advantages. This is how it works the establishment of a damping of pressure pulsations caused by the control process individual injectors. This is particularly important with high pressure injection working internal combustion engines, for example in pump-nozzle arrangements. These pressure pulsations can affect the filling process of neighboring injectors Adversely affect quantity and pressure. With the damping of these pressure pulsations a significant reduction in the injection noise is accompanied by the damping of the pressure peaks avoids falling below the vapor pressure of the fuel. Will this If the temperature falls below this, there are often cavities that emit a lot of noise implode.
- Each cylinder of the internal combustion engine is preferably at least one outflow opening in assigned to the insert, these preferably different cross-sectional areas can have. This gives particularly good results if these cross-sectional areas increase in the course of the fuel flow path. This is ensures that even with increasing heating along the inlet channel sufficiently large amount of fuel to reduce the temperature of the coaxial outside cavity flowing fuel amount is available.
- the insert on its outer Circumference with supports is inserted into the recess of the cylinder head.
- This can be ring-shaped with a comparatively small axial extent and with Breakthroughs are provided through which the fuel along the cavity flows.
- the supports preferably as axially continuous ribs on the outer circumference of the Insert insert, these ribs in the area leading to the injectors Cross lines are reduced in terms of their radial extension, which results in a circumferential, groove-like channel for supplying the fuel flowing between the ribs of the respective cross line.
- a stand dealing with axially continuous supports in a cavity Technology is known from DE-40 19 766 C2 for a completely different purpose. These The device shown is used to distribute oil within a rotating camshaft and enables several oil flows to be conducted independently of one another in this.
- the coolant-carrying area in the cylinder head extends into the immediate vicinity of the recess and thereby excessive Prevention of heat from the cylinder head in the fuel.
- a cylinder head 1 of an internal combustion engine has a hollow cylindrical recess 2 with an insert 3 arranged therein.
- the insert 3 extends axially in the longitudinal direction L of the internal combustion engine and thereby delimits a cavity 4 lying coaxially between it and the recess 2.
- the insert 3 has a central feed channel 5 for fuel, which by means of outflow openings 6 with precisely defined cross-sectional areas with the Cavity 4 is connected.
- outgoing cross lines 7 are formed from the cavity, which the fuel to the individual cylinders of the internal combustion engine injectors to lead.
- the insert 3 is provided on its outer circumference with supports 8 in the recess 2 held. For unimpeded fuel transfer between the individual cross lines 7 along the cavity 4, these supports 8 are each on their circumference with several Openings 9 provided.
- the heat input from the heated cylinder head 1 in the fuel takes place primarily across the interface between recess 2 and Cylinder head 1, d. H. on the fuel flowing in the cavity 4. From there, one takes place further heat transfer through the wall of the insert 3 to the in the inlet channel 5 in Counter-current fuel flowing. Partial volume flows of the supplied via the inlet 10 Total volume flow pass through the outflow openings 6 before reaching the one in FIG. 1 left end 11 of the recess 2 from the inlet channel 5 into the cavity 4.
- the size of the cross-sectional areas of the outflow openings 6 increases in the direction of Flow path in the inlet channel 5, so that the decreasing temperature gradient to Fuel in the cavity 4 is compensated for by an increased volume flow.
- the supports 8 extend axially continuously on the outer circumference of the insert 3 and thereby ensure one vibration-free seat within the recess 2.
- the radial extension of the supports 8 is reduced in the area of the cross lines 7, so that there is a circumferential groove for the unhindered exchange of the flowing in the channels between the individual supports 8 Fuel can take place.
- the temperature level can be further reduced the cooling water chamber of the cylinder head 1 be designed so that it is at least in sections with some of its chambers 12 in the immediate vicinity of the recess 2 extends.
- the axially continuous supports 8 can be used to even out the heat exchange be arranged helically curved around the inlet channel 5.
- the entire device can be tailored to the respective application.
- a comparatively high heat exchange takes place in countercurrent between the inlet duct 5 and the cavity 4, while a comparatively high temperature difference is maintained in the case of poor thermal conductivity.
- Further parameters are the cross-sectional areas of the outflow openings 6 and all other flow cross sections. Depending on requirements, all outflow openings 6 can also have the same cross-sectional area or, in reverse of the arrangement shown in FIG. 1, be made larger on the inlet side than at the end 11.
- a ceramic tube body be fully inserted into the recess 2, in which the insert 3 is inserted.
- This tubular body only has in the area of the transverse line 7 Discharge openings.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
Es zeigt:
- Figur 1
- schematisch einen Querschnitt durch einen hier interessierenden Bereich eines Zylinderkopfes,
- Figur 2
- einen Querschnitt gemäß Figur 1 und
- Figur 3
- eine Ausführungsvariante zu Figur 1.
Der Einsatz 3 erstreckt sich axial in Längsrichtung L der Brennkraftmaschine und begrenzt dabei einen koaxial zwischen ihm und der Ausnehmung 2 liegenden Hohlraum 4.
Bedarfsabhängig können auch alle Abströmöffnungen 6 die gleiche Querschnittsfläche aufweisen oder aber in Umkehrung der in Figur 1 gezeigten Anordnung eintrittsseitig größer ausgebildet sein als am Ende 11.
Claims (8)
- Einrichtung zur Verteilung von Kraftstoff für eine mit einem Zylinderkopf (1) versehene Brennkraftmaschine, mit einer Kraftstoff führenden Leitung, von welcher aus Kraftstoff zu einzelnen Zylindern der Brennkraftmaschine zugeordneten Injektoren geführt wird, die im Zylinderkopf angeordnet sind, wobei die Leitung von einer sich in Längsrichtung (L) der Brennkraftmaschine erstreckenden Ausnehmung (2) als integraler Bestandteil des Zylinderkopfes (1) gebildet ist,
dadurch gekennzeichnet, daß
in der Ausnehmung (2) ein sich axial erstreckender, rohrförmiger Einsatz (3) unter Bildung eines koaxialen Hohlraumes (4) angeordnet ist, der einen zentralen Zulaufkanal (5) für Kraftstoff aufweist, der mittels definierter Abströmöffnungen (6) mit dem Hohlraum (4) verbunden ist, wobei der Hohlraum (4) mit den Injektoren verbindbar ist. - Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß jedem Zylinder der Brennkraftmaschine mindestens eine Abströmöffnung (6) zugeordnet ist.
- Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß zumindest einige der Abströmöffnungen (6) voneinander verschiedene Querschnittsflächen aufweisen.
- Einrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die Querschnittsflächen mit zunehmendem Strömungsweg größer werden.
- Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Einsatz (3) außenumfänglich mit Stützen (8) versehen in der Ausnehmung (2) gehalten ist.
- Einrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die Stützen (8) außenumfänglich mit Durchbrechungen (9) versehen sind.
- Einrichtung nach Anspruch 5, dadurch gekennzeichnet, daß der Hohlraum (4) mittels im Zylinderkopf (1) ausgebildeter Querleitungen (7) mit den Injektoren verbunden ist und sich die Stützen (8) axial durchlaufend auf dem Außenumfang des Einsatzes (3) den Hohlraum (4) überbrückend erstrecken, wobei im Bereich der Querleitungen (7) die radiale Erstreckung dieser Stützen (8) unter Bildung eines umlaufenden Kanales verringert ist.
- Einrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die Stützen (8) gekrümmt verlaufend auf dem Einsatz (3) angeordnet sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19634260 | 1996-08-24 | ||
DE19634260 | 1996-08-24 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0826873A2 EP0826873A2 (de) | 1998-03-04 |
EP0826873A3 EP0826873A3 (de) | 1998-06-03 |
EP0826873B1 true EP0826873B1 (de) | 2000-05-24 |
Family
ID=7803594
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97114010A Expired - Lifetime EP0826873B1 (de) | 1996-08-24 | 1997-08-14 | Einrichtung zur Verteilung von Kraftstoff für eine Brennkraftmaschine |
Country Status (4)
Country | Link |
---|---|
US (1) | US5803051A (de) |
EP (1) | EP0826873B1 (de) |
CZ (1) | CZ262597A3 (de) |
DE (2) | DE59701747D1 (de) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001159380A (ja) * | 1999-12-03 | 2001-06-12 | Keihin Corp | 燃料噴射装置における燃料分配管 |
DE19927467A1 (de) * | 1999-06-16 | 2000-12-21 | Volkswagen Ag | Vorrichtung zur Verteilung von Kraftstoff für eine Brennkraftmaschine |
DE19936533A1 (de) * | 1999-08-03 | 2001-02-15 | Bosch Gmbh Robert | Kraftstoffhochdruckspeicher |
DE60024938T2 (de) * | 1999-08-27 | 2006-08-24 | Delphi Technologies, Inc., Troy | Verbindungsanordnung |
US20020043249A1 (en) * | 2000-10-16 | 2002-04-18 | Ki-Ho Lee | Fuel rail with intergal dampening features |
DE10055675A1 (de) * | 2000-11-10 | 2002-05-16 | Volkswagen Ag | Einrichtung zur Verteilung von Kraftstoff für eine Brennktaftmaschine |
US6637776B2 (en) * | 2001-06-13 | 2003-10-28 | Cummins Inc. | Fluid manifold connector and fluid manifold assembly |
DE10140057B4 (de) * | 2001-08-16 | 2007-08-30 | Robert Bosch Gmbh | Kraftstoffhochdruckspeicher |
US6418910B1 (en) * | 2001-10-05 | 2002-07-16 | Siemens Automotive Corporation | Rail geometry for minimization of fluid pressure pulsations |
US6761150B2 (en) * | 2002-11-05 | 2004-07-13 | Millennium Industries Corp. | Fuel rail flow-feed pulse damper |
DE10309311B4 (de) * | 2003-03-04 | 2005-01-05 | Siemens Ag | Kraftstoffhockdruckspeicher |
FR2891876A3 (fr) * | 2005-10-07 | 2007-04-13 | Renault Sas | Dispositif d'injection a rampe commune pour moteur a combustion interne et injection de carburant. |
US7455040B2 (en) | 2006-10-10 | 2008-11-25 | Delphi Technologies, Inc. | Hydraulic circuit for switchable cam followers |
US9458808B1 (en) * | 2014-12-15 | 2016-10-04 | Brunswick Corporation | Marine propulsion devices and fuel injection systems for marine propulsion devices |
US20170051715A1 (en) * | 2015-08-19 | 2017-02-23 | Hitachi Automotive Systems Americas Inc. | Fuel rail for an internal combustion engine |
CN110486205B (zh) * | 2019-08-07 | 2020-10-09 | 中国北方发动机研究所(天津) | 一种内外双轨分腔式高压共轨管 |
IT201900015099A1 (it) * | 2019-08-27 | 2021-02-27 | Bosch Gmbh Robert | Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna |
US11708810B1 (en) * | 2022-05-17 | 2023-07-25 | Caterpillar Inc. | Fuel system and engine head assembly having double-walled fuel connector for cooling fuel return |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3125078A (en) * | 1964-03-17 | Fuel supply system | ||
US4922958A (en) * | 1987-08-03 | 1990-05-08 | Colt Industries Inc. | Manifold for distributing a fluid and method for making same |
DE3905254A1 (de) * | 1988-03-02 | 1989-09-14 | Volkswagen Ag | Kuehlvorrichtung fuer kraftstoff-einspritzventile einer brennkraftmaschine |
JP2694276B2 (ja) * | 1988-04-18 | 1997-12-24 | スズキ株式会社 | 燃料供給装置 |
US5035221A (en) * | 1989-01-11 | 1991-07-30 | Martin Tiby M | High pressure electronic common-rail fuel injection system for diesel engines |
US5022371A (en) * | 1989-09-29 | 1991-06-11 | Siemens-Bendix Automotive Electronics L.P. | Molded plastic fuel rail for an internal combustion engine |
DE4019766A1 (de) * | 1990-06-21 | 1992-01-09 | Porsche Ag | Vorrichtung zur verteilung von oel in einer nockenwelle |
JPH04183964A (ja) * | 1990-11-15 | 1992-06-30 | Hino Motors Ltd | 燃料噴射装置 |
DE4115039A1 (de) * | 1991-05-08 | 1992-11-12 | Bosch Gmbh Robert | Brennstoffverteiler |
US5121731A (en) * | 1991-06-20 | 1992-06-16 | Siemens Automotive L.P. | Means for mounting a fuel injector on a fuel rail |
SE468719B (sv) * | 1991-07-02 | 1993-03-08 | Saab Scania Ab | Arrangemang foer braensleledning vid foerbraenningsmotor |
US5392749A (en) * | 1991-10-11 | 1995-02-28 | Caterpillar Inc. | Hydraulically-actuated fuel injector system having separate internal actuating fluid and fuel passages |
IT232907Y1 (it) * | 1993-05-17 | 2000-01-21 | Weber Srl | collettore per un dispositivo di alimentazione di carburante ad un motore a combustione interna. |
DE19514055B8 (de) * | 1994-04-13 | 2006-02-09 | Denso Corp., Kariya | Kraftstoffzuführsystem und dafür vorgesehene Versorgungsleitung |
-
1997
- 1997-08-14 EP EP97114010A patent/EP0826873B1/de not_active Expired - Lifetime
- 1997-08-14 DE DE59701747T patent/DE59701747D1/de not_active Expired - Lifetime
- 1997-08-16 DE DE19735437A patent/DE19735437A1/de not_active Withdrawn
- 1997-08-18 CZ CZ972625A patent/CZ262597A3/cs unknown
- 1997-08-21 US US08/916,149 patent/US5803051A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE59701747D1 (de) | 2000-06-29 |
CZ262597A3 (cs) | 1998-04-15 |
EP0826873A2 (de) | 1998-03-04 |
DE19735437A1 (de) | 1998-02-26 |
EP0826873A3 (de) | 1998-06-03 |
US5803051A (en) | 1998-09-08 |
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