EP2414663A1 - Fuel injection device - Google Patents
Fuel injection deviceInfo
- Publication number
- EP2414663A1 EP2414663A1 EP10708536A EP10708536A EP2414663A1 EP 2414663 A1 EP2414663 A1 EP 2414663A1 EP 10708536 A EP10708536 A EP 10708536A EP 10708536 A EP10708536 A EP 10708536A EP 2414663 A1 EP2414663 A1 EP 2414663A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel injection
- injection device
- return
- connection
- combustion chamber
- 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.)
- Granted
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 75
- 238000002347 injection Methods 0.000 title claims abstract description 55
- 239000007924 injection Substances 0.000 title claims abstract description 55
- 238000002485 combustion reaction Methods 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims description 9
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
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
- F02M55/002—Arrangement of leakage or drain conduits in or from 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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
-
- 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
Definitions
- the invention relates to a fuel injection device for injecting fuel into a combustion chamber of an internal combustion engine, with a combustion chamber remote end having at least one electrical connection and at least one return connection.
- German Offenlegungsschrift DE 31 05 685 A1 discloses a liquid-cooled fuel injection nozzle with a common connection nipple for the drainage of the oil drain and the coolant return.
- German Offenlegungsschrift DE 10 2006 040 248 A1 discloses a fuel injection device for a multi-cylinder internal combustion engine having a housing which has two high-pressure connections.
- the object of the invention is to provide a fuel injection device according to the O-berbegriff of claim 1, which is simple and inexpensive to produce.
- both the return connection and the electrical connection run through the common connection. circuit body.
- a preferred embodiment of the fuel injection device is characterized in that the return port and the electrical connection run through the common connection body.
- the common connection body preferably surrounds the two connections so that injuries to a pedestrian at the connections can be reliably prevented.
- the height of the combustion chamber remote end of the Kraftstoffein- injection device can be reduced by the common connection body.
- Another preferred embodiment of the fuel injection device is characterized in that the return port and the electrical connection are partially encapsulated with plastic material.
- the return connection is preferably encapsulated with the same plastic material as used for encapsulating electrical connections.
- a further preferred exemplary embodiment of the fuel injection device is characterized in that the fuel injection device comprises a magnetic group which, at least partially, is encapsulated with plastic material together with the return port and the electrical connection.
- the magnet group includes, for example, a magnetic actuator which cooperates in a known manner with a magnetic coil, which is associated with the electrical connection.
- a further preferred embodiment of the fuel injection device is characterized in that the return port extends through a support plate, which constitutes a conclusion at the combustion chamber remote end of the fuel injection device.
- the support plate is preferably used to a guide bolt for the magnet armature of the magnet group in the axial direction on the away from the combustion chamber end of the fuel injection device.
- the support plate may be completely or partially overmoulded with plastic material.
- a further preferred embodiment of the fuel injection device is characterized in that radially outside an inner support point of the support plate at least one return channel emanates from a return space in the fuel injection device. At the inner support point of the guide pin described above may be supported.
- the return passage serves to discharge, for example, leakage and / or a cooling medium in the form of fuel, which is acted upon by low pressure, from the interior of the fuel injection device.
- the return passage may communicate with a fuel receptacle external to the fuel injector.
- a further preferred embodiment of the fuel injection device is characterized in that radially outside an inner support point of the support plate, a plurality of return passages emanate from a return space in the fuel injection device, which open into a central return connection channel.
- the return passage in the common connection body may, for example, have the shape of a two-winged wye extending from the return space inside the fuel injection device and opening into the central return connection passage.
- a further preferred exemplary embodiment of the fuel injection device is characterized in that a return connection channel running transversely to a longitudinal direction of the fuel injection device originates from the return channel or the return connection channel.
- the return is formed in the common connection body substantially L-shaped.
- Another preferred embodiment of the fuel injection device is characterized in that two return passageways extending transversely to a longitudinal direction of the fuel injection device start from the return passage or the return connection passage.
- the return is formed in the common connection body is substantially T-shaped. - A -
- a further preferred embodiment of the fuel injection device is characterized in that at the inner support point, a guide pin and / or a spring device are supported on the inside of the support plate / is.
- the spring device comprises, for example, a helical compression spring, by which the magnet armature of the magnet group is biased towards the combustion chamber.
- the spring device may further comprise a plate spring, which acts on a magnetic actuator with a biasing force.
- Figure 1 is a highly simplified representation of a portion of a fuel injection system with four fuel injection devices connected in series;
- FIG 2 is an enlarged and detailed illustration of the combustion chamber remote end of one of the fuel injection devices of Figure 1 in longitudinal section and
- FIG. 3 shows a longitudinal section, rotated by 90 degrees, of the end remote from the combustion chamber of the fuel injection device from FIG. 2.
- the fuel injectors 1 to 4 each include a combustion chamber near end 5, is injected from the high-pressure fuel into associated combustion chambers of an internal combustion engine.
- the fuel injection devices 1 to 4 which are also referred to as fuel injectors, furthermore each have a combustion chamber distal end 6, which is connected to a return via a return port 8.
- the return ports of the fuel injectors 1 to 3 are each designed as T-piece 1 1, 12, 13.
- the return port of the fuel injection device 4 is designed as an L-piece 14.
- the two tees 12 and 13 are connected via a connecting line 15 with each other.
- the T-piece is connected via a further connecting line 17 with the L-piece 14.
- the two tees 12 and 13 are connected via a connecting line 15 with each other.
- the T-piece is connected via a further connecting line 17 with the L-piece 14.
- T-pieces 1 1 and 12 are connected to each other via a connecting line 18. From the T-piece 1 1 further extends a connecting line 19 to a return collection chamber, which is indicated by an arrow 16.
- the fuel injector only partially shown in Figure 1 is preferably designed for a multi-cylinder internal combustion engine, preferably a self-igniting internal combustion engine, a motor vehicle.
- the fuel injection device comprises, in addition to the illustrated fuel injectors 1 to 4, at least one high-pressure pump, through which fuel is conveyed under high pressure.
- Each cylinder of the internal combustion engine is associated with one of the fuel injectors 1 to 4, which are also referred to as injectors and through which the fuel can be injected into the combustion chamber of the associated cylinder.
- the high-pressure fuel is supplied to the fuel injectors 1 to 4 via high-pressure fuel lines.
- the control of the fuel injectors 1 to 4 is preferably carried out electrically via electrical connection lines.
- the combustion chamber remote end 6 of the fuel injection device 1 is shown enlarged in two different longitudinal sectional views.
- the fuel injection device 1 comprises a housing body 20, which may be made in one or more parts.
- a magnet group 22 is accommodated in a return pressure chamber 24.
- the magnet group 22 comprises a magnetic actuator 25 with a magnetic coil 26 which cooperates with a magnetic armature 27.
- the magnet armature 27 is guided away from the magnet coil 26 by a guide pin 28 and towards the magnet coil 26.
- the guide pin 28 is attached to a support plate 30. supported, which limits the return pressure chamber 24 in the axial direction. In the radial direction of the return pressure chamber 24 is bounded by the housing body 20.
- the armature 27 is biased away from the solenoid 26 by a helical compression spring 31 through which the guide pin 28 extends.
- the magnetic actuator 25 with the magnetic coil 26 is biased away by a plate spring 32 of the support plate 30 and is controlled via an electrical connection 33.
- two electrical connection elements 35, 36 extend from the magnet coil 26 of the magnet group 22 and extend through an electrical connection piece 34 into a connection body 60, which is formed from plastic material 62, with which the end remote from the combustion chamber 6 of the fuel injection device 1 is encapsulated.
- FIG. 2 shows that the connecting element 35 extends transversely to the longitudinal direction of the fuel injection device 1 at its end.
- the return channels 41, 42 extend radially outside of one
- the return connection channel 44 opens at its end remote from the combustion chamber into the connection body 60, through which the two electrical connection elements 35 and 36 also extend. From the combustion chamber-remote end of the return connection channel 44, two transverse return connection channels 51, 52 extend in the form of pieces of pipe through the plastic material 62, which forms the connection body 60. To the return port channel 51, the connecting line 18 is connected.
- the exemplary embodiment illustrated in FIG. 3 with the two return connection channels 51, 52 represents a T-piece.
- an L-piece can be represented analogously with the aid of only one of the return connection channels 51, 52.
- the return port 40 is integrated directly into the magnet group injection molding. For this purpose, a return fitting can be welded to the support plate and then encapsulated with plastic material.
- the invention also includes an embodiment entirely made of plastic, wherein the connecting piece, for example in the form of a
- the return port can be integrated into a Umspritzungstechnikmaschine with which the combustion chamber remote end of the fuel injection device is molded.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009002128A DE102009002128A1 (en) | 2009-04-02 | 2009-04-02 | Fuel injector |
PCT/EP2010/053168 WO2010112317A1 (en) | 2009-04-02 | 2010-03-12 | Fuel injection device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2414663A1 true EP2414663A1 (en) | 2012-02-08 |
EP2414663B1 EP2414663B1 (en) | 2018-05-16 |
Family
ID=42260338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10708536.7A Active EP2414663B1 (en) | 2009-04-02 | 2010-03-12 | Fuel injection device |
Country Status (5)
Country | Link |
---|---|
US (1) | US9175652B2 (en) |
EP (1) | EP2414663B1 (en) |
CN (1) | CN102369348B (en) |
DE (1) | DE102009002128A1 (en) |
WO (1) | WO2010112317A1 (en) |
Family Cites Families (43)
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US2621875A (en) * | 1950-01-24 | 1952-12-16 | Ralph E Darling | Personal equipment for aircraft pilots |
DE1751802A1 (en) * | 1968-07-31 | 1971-05-06 | Bosch Gmbh Robert | Injection device for injection engine |
CH495504A (en) * | 1968-08-28 | 1970-08-31 | Sopromi Soc Proc Modern Inject | Fuel injection valve with electromagnetic actuation |
DE3013007C2 (en) * | 1980-04-03 | 1994-01-05 | Bosch Gmbh Robert | Injection valve for fuel injection systems of internal combustion engines |
DE3105685A1 (en) | 1981-02-17 | 1982-09-02 | Robert Bosch Gmbh, 7000 Stuttgart | "LIQUID-COOLED FUEL INJECTION NOZZLE" |
DE3207918A1 (en) * | 1982-03-05 | 1983-09-15 | Robert Bosch Gmbh, 7000 Stuttgart | ELECTROMAGNETICALLY ACTUABLE VALVE |
IN165341B (en) * | 1984-08-01 | 1989-09-23 | Orbital Eng Pty | |
ATE67825T1 (en) * | 1985-12-02 | 1991-10-15 | Marco Alfredo Ganser | FUEL INJECTION SYSTEM FOR COMBUSTION ENGINES. |
US4870943A (en) * | 1986-07-01 | 1989-10-03 | Bradley Curtis E | Thermal liquid pump |
DE3703615A1 (en) * | 1987-02-06 | 1988-08-18 | Bosch Gmbh Robert | FUEL INJECTION VALVE |
US4938193A (en) * | 1987-06-15 | 1990-07-03 | Stanadyne Automotive Corp. | Fuel injection nozzle |
DE3888468T2 (en) * | 1987-12-02 | 1994-09-29 | Ganser Hydromag | Electronically controlled fuel injector. |
US4895124A (en) * | 1987-12-02 | 1990-01-23 | Proprietary Technology, Inc. | Fuel and electrical distribution system for fuel injected engines |
DE68922871T2 (en) * | 1988-03-04 | 1995-10-19 | Yamaha Motor Co Ltd | Fuel injector. |
IT1240173B (en) * | 1990-04-06 | 1993-11-27 | Weber Srl | ELECTROMAGNETICALLY OPERATED FUEL INJECTION DEVICE FOR AN INTERNAL COMBUSTION ENGINE |
IT220663Z2 (en) * | 1990-10-31 | 1993-10-08 | Elasis Sistema Ricerca Fita Nel Mezzogiorno Soc.Consortile P.A. | IMPROVEMENTS TO THE ASSEMBLY OF THE CORE OF AN ELECTROMAGNET IN AN ELECTROMAGNETIC INJECTOR FOR INJECTION SYSTEMS OF THE FUEL OF INTERNAL COMBUSTION ENGINES |
DE4140961A1 (en) * | 1991-12-12 | 1993-06-17 | Bosch Gmbh Robert | Electrohydraulic unit for electro fuel pump for motor vehicle - has hydraulic line and current lead connected to one head coupled to connector to make hydraulic and electric connection |
US5325838A (en) * | 1993-05-28 | 1994-07-05 | Bennett David E | Liquified petroleum gas fuel injector |
ATE199966T1 (en) * | 1995-06-02 | 2001-04-15 | Ganser Hydromag | FUEL INJECTION VALVE FOR COMBUSTION ENGINES |
US6027037A (en) * | 1995-12-05 | 2000-02-22 | Denso Corporation | Accumulator fuel injection apparatus for internal combustion engine |
DE19619523A1 (en) * | 1996-05-15 | 1997-11-20 | Bosch Gmbh Robert | Fuel injector for high pressure injection |
GB9615305D0 (en) * | 1996-07-20 | 1996-09-04 | Lucas Ind Plc | Connector |
DE19717459C2 (en) | 1997-04-25 | 1999-03-18 | Bosch Gmbh Robert | Device for the metered injection of fuel into an internal combustion engine |
IT1296144B1 (en) * | 1997-11-18 | 1999-06-09 | Elasis Sistema Ricerca Fiat | ADJUSTABLE DOSING VALVE FOR ONE FUEL INJECTOR FOR INTERNAL COMBUSTION ENGINES. |
DE19942990A1 (en) * | 1999-09-09 | 2001-03-22 | Bosch Gmbh Robert | Common rail injector |
JP4277158B2 (en) * | 2000-04-11 | 2009-06-10 | 株式会社デンソー | Solenoid valve and fuel injection device using the same |
DE10025043A1 (en) * | 2000-05-20 | 2001-11-22 | Bosch Gmbh Robert | Fuel return unit of common rail diesel injection system includes conductors in collection block which are connected to injection valves |
US6568369B1 (en) * | 2000-12-05 | 2003-05-27 | Caterpillar Inc | Common rail injector with separately controlled pilot and main injection |
DE10115322A1 (en) * | 2001-03-28 | 2002-10-17 | Bosch Gmbh Robert | Fuel injection device for internal combustion engines, in particular common rail injector |
DE10206908B4 (en) * | 2002-02-19 | 2010-01-07 | Continental Automotive Gmbh | Injector with improved connection geometry |
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DE10232250A1 (en) * | 2002-07-17 | 2004-02-05 | Robert Bosch Gmbh | Common rail injector for injecting fuel in a common rail injection system for an internal combustion engine has fuel runback/electric plug-in connections contacted by a plug |
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JP4683035B2 (en) * | 2007-11-13 | 2011-05-11 | 株式会社デンソー | Injector |
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DE102008002720A1 (en) * | 2008-06-27 | 2009-12-31 | Robert Bosch Gmbh | fuel injector |
CN101397963A (en) | 2008-11-07 | 2009-04-01 | 清华大学 | High voltage common rail electronic control injector |
-
2009
- 2009-04-02 DE DE102009002128A patent/DE102009002128A1/en not_active Withdrawn
-
2010
- 2010-03-12 EP EP10708536.7A patent/EP2414663B1/en active Active
- 2010-03-12 WO PCT/EP2010/053168 patent/WO2010112317A1/en active Application Filing
- 2010-03-12 US US13/262,835 patent/US9175652B2/en active Active
- 2010-03-12 CN CN201080014634.2A patent/CN102369348B/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2010112317A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN102369348A (en) | 2012-03-07 |
WO2010112317A1 (en) | 2010-10-07 |
CN102369348B (en) | 2014-12-10 |
DE102009002128A1 (en) | 2010-10-14 |
US20120090577A1 (en) | 2012-04-19 |
EP2414663B1 (en) | 2018-05-16 |
US9175652B2 (en) | 2015-11-03 |
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