EP2852754A1 - Injector of a fuel injection system - Google Patents
Injector of a fuel injection systemInfo
- Publication number
- EP2852754A1 EP2852754A1 EP13718835.5A EP13718835A EP2852754A1 EP 2852754 A1 EP2852754 A1 EP 2852754A1 EP 13718835 A EP13718835 A EP 13718835A EP 2852754 A1 EP2852754 A1 EP 2852754A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- bore
- resonator
- injector
- holding body
- 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
- 238000002347 injection Methods 0.000 title claims abstract description 29
- 239000007924 injection Substances 0.000 title claims abstract description 29
- 239000000446 fuel Substances 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 10
- 230000013011 mating Effects 0.000 claims description 3
- 230000001747 exhibiting effect Effects 0.000 claims 1
- 230000010355 oscillation Effects 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
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- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/008—Arrangement of fuel passages inside of 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
- 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
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
-
- 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
- F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
- F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
-
- 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
- F02M2200/40—Fuel-injection apparatus with fuel accumulators, e.g. a fuel injector having an integrated fuel accumulator
-
- 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
- F02M2200/8076—Fuel injection apparatus manufacture, repair or assembly involving threaded members
-
- 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
- F02M2200/85—Mounting of fuel injection apparatus
- F02M2200/852—Mounting of fuel injection apparatus provisions for mounting the fuel injection apparatus in a certain orientation, e.g. markings or notches
Definitions
- the invention relates to an injector of a modular common rail fuel injection system with a high-pressure accumulator integrated in the injector body, the injector having an injection nozzle with a nozzle needle guided axially displaceably, surrounded by a nozzle chamber, a high-pressure bore connecting the high-pressure accumulator with the nozzle chamber, a parallel to High-pressure bore switched resonator, which communicates with the injector and is connected via a resonator choke in the high-pressure accumulator, and a
- Injection injectors of this type are used in modular common rail systems, which are characterized in that a part of the existing storage volume in the system is present in the injector itself. Modular common-rail systems are used on particularly large engines where the individual injectors may be mounted at a considerable distance from each other. The sole use of a common rail for all injectors is not useful in such engines, as it would come due to the long lines during injection to a massive slump in Ein-injection pressure, so with prolonged injection duration, the injection rate would noticeably break.
- each injector has its own high-pressure accumulator and thus can be used as a stand-alone module.
- a high-pressure accumulator this is not a common line to understand, but it is a high-pressure accumulator to a pressure-resistant vessel with an inlet and outlet whose diameter in
- a possibility of reducing pressure pulsations can be taken from WO 2007/143768 A1, wherein a resonator line connected in parallel to the high-pressure line between the injection nozzle and the high-pressure accumulator is provided, which has a resonator throttle on the high-pressure accumulator side.
- a resonator line connected in parallel to the high-pressure line between the injection nozzle and the high-pressure accumulator is provided, which has a resonator throttle on the high-pressure accumulator side.
- Resonator choke arranged at the entrance of the resonator in the high-pressure accumulator.
- the resonator bore is first drilled in the form of a blind hole with a diameter of eg 3 mm from one side of the holding body ago. Thereafter, the resonator throttle is drilled, for example, with a diameter of 0.7 - 0.9 mm from the opposite side, this hole should open as central as possible in the resonator bore for reasons of high pressure resistance.
- the axis of the resonator bore should thus coincide with the axis of the resonator choke.
- Drilling error leads to the fact that the throttle bore does not open centrally in the resonator bore, but offset by up to 0.5 mm.
- the invention therefore aims to realize the described resonator function in injectors with longer high-pressure wells in a structurally simple manner, without significantly impairing the high-pressure resistance.
- the invention essentially provides, starting from an injector of the type mentioned above, that an end portion of the high-pressure bore facing the high-pressure accumulator and an end portion of the resonator bore facing the high-pressure accumulator and having the resonator throttle is designed in a separate component which is located between the holding body and the storage tube is inserted and is fixed by the screw connection of holding body and storage tube.
- the separate component is made shorter than the holding body, so for example. is formed with an axial length of less than 100mm, preferably less than 50 mm, more preferably less than 30mm. At most, an offset occurs at the transition between the resonator bore embodied in the holding body and the end portion of the resonator bore executed in the separate component, which is less critical with regard to the high-pressure resistance.
- the separate component is in this case held only by the axial force generated during screwing of the holding body with the storage tube and clamped between these two components without the need for further fasteners as it were.
- a preferred embodiment of the invention provides that the holding body and the separate component are secured against rotation by means of an axial pin.
- the separate component carries a conical sealing surface, which cooperates with a formed on a shoulder of the storage tube conical mating surface of the storage tank.
- the separate component preferably has a planar sealing surface which cooperates with the planar end face of the holding body.
- a preferred embodiment provides that the two end sections converge towards one another.
- the two end sections open into a blind hole formed in the separate component.
- the two end sections can also run parallel to one another.
- the separate component is designed as a plate.
- the resonator throttle is arranged at the inlet of the resonator bore into the high-pressure accumulator.
- the resonator choke is thus formed in the separate component.
- the resonator throttle can be designed in different lengths.
- the resonator throttle may be relatively short, so that it extends only over a short axial section, in particular via an end section of the separate component, in particular the plate, facing the high-pressure accumulator.
- the resonator choke can extend through the separate component, in particular the plate, so that its length corresponds to the axial extension of the separate component, in particular the plate.
- the inventive design is particularly advantageous for injectors to bear, in which the nozzle needle for controlling its opening and closing movement of the prevailing in a fuel-pressurized control chamber pressure in the axial direction can be acted upon, wherein the control chamber with a inlet throttle having inlet channel and a flow channel having an outlet throttle is in communication and at least one control valve opening or closing the inlet or outlet channel is seen, with which the pressure in the control chamber is controlled, that the inlet throttle and the outlet throttle are formed in a throttle plate, that the control valve is formed in a valve plate and that the high-pressure bore and the resonator bore to pass through the valve plate and the throttle plate.
- the injector is usually designed such that an injector and / or holding body accommodating the high-pressure accumulator, the valve plate, the throttle plate and the injection nozzle are held together by a nozzle retaining nut.
- the high-pressure bore and the resonator bore extend through the holding body, the valve plate and the throttle plate and thereby connect the high-pressure accumulator with the injection nozzle.
- the length of the resonator bore is preferably matched to the length of the high-pressure bore so that the pressure oscillations induced by the injector mutually weaken or extinguish each other.
- the length of the resonator bore between the injection nozzle and the resonator throttle as well as the length of the high-pressure bore between the injection nozzle and the inlet of the high-pressure bore into the pressure accumulator are each preferably an integer multiple of the wavelength of the pressure oscillation induced by the injection nozzle.
- the length of the resonator bore between the nozzle front chamber and the resonator throttle preferably corresponds substantially to the length of the high-pressure bore between the nozzle front chamber and the inlet of the high-pressure bore into the pressure accumulator.
- FIG. 1 shows schematically a cross section of an injector equipped with a high-pressure accumulator according to the prior art
- FIG. 2 shows a detailed representation of the confluence region of the resonator throttle in the high-pressure accumulator.
- an injector 1 which has an injection nozzle 2, a throttle plate 3, a valve plate 4, a holding body 5 and a high-pressure accumulator 6, wherein a bolted to the holding body 5 nozzle retaining nut 7, the injection nozzle 2, the throttle plate 3 and the Valve plate 4 holds together.
- the solenoid valve 13 is closed, so that high pressure fuel from the high-pressure accumulator 6 via the high-pressure bore 8, the cross-connection 9 and the inlet throttle 10 flows into the control chamber 11 of the injection nozzle 2, the outflow from the control chamber 11 via the outlet throttle 12 but at the valve seat of the solenoid valve thirteenth is blocked.
- a resonator is used. This consists of a resonator bore 20, which has the same length and possibly the same diameter as the high-pressure bore 8, and a resonator throttle 21 which is attached to the memory-side end of the resonator bore 20 and connects it to the high-pressure reservoir 6.
- FIG. 2 shows a arranged between the storage tube 25, the high-pressure accumulator 6 and the holding body 5 plate 23, which represents the present invention provided separate component.
- the plate 23 has a conical sealing surface 24 which cooperates with a formed on a shoulder 26 of the storage tube 25 conical mating sealing surface.
- the shoulder 26 of the storage tube 25 is connected via an annular groove-like recess 27 with a thin-walled, provided with an internal thread 28 portion 29 of the storage tube 25.
- the plate 23 is inserted between the holding body 5 and the storage tube 25 and fixed by the screw connection of these two components.
- the plate 23 is secured by means of at least one pin 30 against rotation.
- a ring seal 36 provides an additional seal.
- an end portion 32 of the high-pressure bore 8 and an end portion 33 of the resonator bore 20 is now formed.
- the two end portions extend obliquely to the injector 34 and converge toward a high-pressure accumulator-side blind hole 35, in which both end portions 32, 33 open.
- the end section 33 of the resonator bore 20 opens into the high-pressure accumulator 6 via the resonator throttle 21.
- the end section 32 merges into the high-pressure bore 8 and the end section 3 into the resonator bore.
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 |
---|---|---|---|
AT6012012A AT512960B1 (en) | 2012-05-22 | 2012-05-22 | Injector of a modular common rail fuel injection system |
PCT/EP2013/058491 WO2013174601A1 (en) | 2012-05-22 | 2013-04-24 | Injector of a fuel injection system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2852754A1 true EP2852754A1 (en) | 2015-04-01 |
EP2852754B1 EP2852754B1 (en) | 2016-12-21 |
Family
ID=48190500
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13718835.5A Not-in-force EP2852754B1 (en) | 2012-05-22 | 2013-04-24 | Injector of a fuel injection system |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2852754B1 (en) |
AT (1) | AT512960B1 (en) |
WO (1) | WO2013174601A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB714502A (en) * | 1951-06-15 | 1954-09-01 | Ici Ltd | Improvements in or relating to plastic articles reinforced with fibrous materials comprising aromatic polyesters |
US9644590B2 (en) * | 2014-01-31 | 2017-05-09 | Cummins Inc. | Fuel injection pressure pulsation dampening system |
GB201504729D0 (en) * | 2015-03-20 | 2015-05-06 | Delphi International Operations Luxembourg S.�.R.L. | Control valve body |
CN107035586B (en) * | 2017-01-18 | 2023-01-03 | 哈尔滨工程大学 | Micro-dynamic oil return resonant type electric control oil injector with hydraulic feedback |
CN106523222A (en) * | 2017-01-18 | 2017-03-22 | 哈尔滨工程大学 | Double-way oil inlet resonance pore plate type electronic oil injector with engraved groove |
DE102021200154A1 (en) * | 2021-01-11 | 2022-07-14 | Robert Bosch Gesellschaft mit beschränkter Haftung | fuel injector |
CN114165376B (en) * | 2021-12-17 | 2023-06-30 | 中国船舶集团有限公司第七一一研究所 | Fuel injector and fuel injection method |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10060812A1 (en) * | 2000-12-07 | 2002-06-13 | Bosch Gmbh Robert | Fuel injection system for internal combustion engines |
DE10060811A1 (en) * | 2000-12-07 | 2002-06-13 | Bosch Gmbh Robert | Fuel injection system for internal combustion engines |
DE10121891A1 (en) * | 2001-05-05 | 2002-11-07 | Bosch Gmbh Robert | Fuel injection valve for internal combustion engines |
DE10157135B4 (en) * | 2001-11-21 | 2004-03-11 | Man B & W Diesel Ag | Fuel supply system in the form of a common rail system of an internal combustion engine with several cylinders |
FR2862352B1 (en) * | 2003-11-14 | 2006-02-24 | Renault Sas | FUEL INJECTION DEVICE EQUIPPED WITH PRESSURE WAVE DAMPING MEANS |
AT503660B1 (en) * | 2006-06-13 | 2007-12-15 | Bosch Gmbh Robert | DEVICE FOR INJECTING FUEL IN THE COMBUSTION ENGINE OF AN INTERNAL COMBUSTION ENGINE |
JP2010275908A (en) * | 2009-05-27 | 2010-12-09 | Yanmar Co Ltd | Injector |
CH702496B1 (en) * | 2010-05-07 | 2011-07-15 | Liebherr Machines Bulle Sa | Power injector. |
AT509877B1 (en) * | 2010-11-02 | 2011-12-15 | Bosch Gmbh Robert | DEVICE FOR INJECTING FUEL IN THE COMBUSTION ENGINE OF AN INTERNAL COMBUSTION ENGINE |
-
2012
- 2012-05-22 AT AT6012012A patent/AT512960B1/en not_active IP Right Cessation
-
2013
- 2013-04-24 EP EP13718835.5A patent/EP2852754B1/en not_active Not-in-force
- 2013-04-24 WO PCT/EP2013/058491 patent/WO2013174601A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2013174601A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2013174601A1 (en) | 2013-11-28 |
AT512960A1 (en) | 2013-12-15 |
AT512960B1 (en) | 2014-03-15 |
EP2852754B1 (en) | 2016-12-21 |
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