EP0826873A2 - Dispositif de distribution de carburant pour un moteur à combustion - Google Patents

Dispositif de distribution de carburant pour un moteur à combustion Download PDF

Info

Publication number: EP0826873A2
Authority: EP; European Patent Office
Prior art keywords: fuel; combustion engine; insert; cylinder head; internal combustion
Prior art date: 1996-08-24
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

EP97114010A

Other languages

German (de)

English (en)

Other versions

EP0826873B1 (fr

EP0826873A3 (fr

Inventor

Hartmut Dipl.-Ing. Stehr

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.)

Volkswagen AG

Original Assignee

Volkswagen AG

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.)

1996-08-24

Filing date

1997-08-14

Publication date

1998-03-04

1997-08-14 Application filed by Volkswagen AG filed Critical Volkswagen AG

1998-03-04 Publication of EP0826873A2 publication Critical patent/EP0826873A2/fr

1998-06-03 Publication of EP0826873A3 publication Critical patent/EP0826873A3/fr

2000-05-24 Application granted granted Critical

2000-05-24 Publication of EP0826873B1 publication Critical patent/EP0826873B1/fr

2017-08-14 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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, removable and space-saving Arrangement created and deal with no aspects of fuel cooling or any Uniformization of the fuel temperature. This is also not the case with such facilities required because, as already mentioned, they are arranged freely in the engine compartment.
the invention has for its object a device for distributing fuel for to provide an internal combustion engine provided with a cylinder head, which an Uniformization of the temperatures of the fuel flows supplied to the individual injectors offers and also lowers the overall temperature level of the fuel.
This object is achieved in a generic device in that the fuel-carrying line as extending in the longitudinal direction of the internal combustion engine Recess is formed, integral part of the cylinder head of this internal combustion engine is and in this recess an axially extending, tubular Inserted to form a coaxial cavity connected to the injectors is.
This insert has a central inlet channel for fuel, which by means of defined discharge openings is connected to the cavity.
the fuel therefore enters the inlet channel at a certain temperature and heats up on its flow path within the insert solely through the operation of the Internal combustion engine existing heat development in the cylinder head.
the one on the downstream side Fuel entering the cavity will heat up during the course of the operation of the flow path located there, although there is already a certain leveling out due to the heat transfer between the internal inlet duct and the Cavity enters.
Along the flow path there is a relative within the insert cool fuel flow while the outer cavity is relatively warm.
equalization comes as an essential part which in each case via the defined outflow openings directly from the inlet channel in fuel crossing the cavity.
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)

EP97114010A 1996-08-24 1997-08-14 Dispositif de distribution de carburant pour un moteur à combustion Expired - Lifetime EP0826873B1 (fr)

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 true EP0826873A2 (fr)	1998-03-04
EP0826873A3 EP0826873A3 (fr)	1998-06-03
EP0826873B1 EP0826873B1 (fr)	2000-05-24

Family

ID=7803594

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP97114010A Expired - Lifetime EP0826873B1 (fr)	1996-08-24	1997-08-14	Dispositif de distribution de carburant pour un moteur à combustion

Country Status (4)

Country	Link
US (1)	US5803051A (fr)
EP (1)	EP0826873B1 (fr)
CZ (1)	CZ262597A3 (fr)
DE (2)	DE59701747D1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
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
ATE313710T1 (de) *	1999-08-27	2006-01-15	Delphi Tech Inc	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
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)

* Cited by examiner, † Cited by third party
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.
US5595160A (en) *	1994-04-13	1997-01-21	Nippondenso Co., Ltd.	Fuel supply system and delivery pipe for use in same

1997
- 1997-08-14 DE DE59701747T patent/DE59701747D1/de not_active Expired - Lifetime
- 1997-08-14 EP EP97114010A patent/EP0826873B1/fr 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
US5803051A (en)	1998-09-08
DE59701747D1 (de)	2000-06-29
EP0826873B1 (fr)	2000-05-24
EP0826873A3 (fr)	1998-06-03
CZ262597A3 (cs)	1998-04-15
DE19735437A1 (de)	1998-02-26

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