EP1504187A1 - Injektor zur kraftstoffeinspritzung - Google Patents
Injektor zur kraftstoffeinspritzungInfo
- Publication number
- EP1504187A1 EP1504187A1 EP03735282A EP03735282A EP1504187A1 EP 1504187 A1 EP1504187 A1 EP 1504187A1 EP 03735282 A EP03735282 A EP 03735282A EP 03735282 A EP03735282 A EP 03735282A EP 1504187 A1 EP1504187 A1 EP 1504187A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- injector
- throttle
- module
- injector according
- throttle module
- 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 17
- 238000002347 injection Methods 0.000 title description 7
- 239000007924 injection Substances 0.000 title description 7
- 238000002485 combustion reaction Methods 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007921 spray Substances 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
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
- F02M63/0035—Poppet valves, i.e. having a mushroom-shaped valve member that moves perpendicularly to the plane of the valve seat
-
- 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
- F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
-
- 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
- F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
- F02M2547/003—Valve inserts containing control chamber and valve piston
Definitions
- the present invention relates to an injector for injecting fuel into a combustion chamber of an internal combustion engine with the features of the preamble of claim 1.
- Fuel injection injectors are known, for example, for common rail systems in different configurations.
- a conventionally constructed injector comprises a nozzle needle, which is connected indirectly via a control piston or directly to a control chamber which is pressurized. If the pressure at the nozzle and the control chamber is the same, the resultant force is generated by the geometrically predetermined ratio of the areas on which the pressure ripens. If, for example, the area at the nozzle is smaller than the area at the control piston, a resulting force is generated which presses the nozzle needle into its seat and thus closes the nozzle.
- the control room is connected to a high pressure area from a reservoir (rail) via a so-called inlet throttle, which is also led to the nozzle.
- the control chamber is still connected to a control valve via a so-called flow restrictor. Since the outlet throttle has a larger flow cross-section than the inlet throttle, the pressure in the control chamber drops when the control valve is opened. As a result of this reduction in pressure in the control chamber, the resulting force on the nozzle needle changes, so that the nozzle needle lifts off its seat and fuel can flow out into the combustion chamber of the internal combustion engine through the spray hole bores.
- the control chamber and the inlet throttle or the outlet throttle were each introduced into an injector body.
- the injector body has a relatively complicated structure and is relatively complicated to manufacture from a manufacturing point of view, since a large number of operations have to be carried out on the injector body.
- the injector according to the invention is constructed in such a way that an inlet throttle and an outlet throttle are provided in a throttle module designed as a separate component.
- a reset element in the separate throttle module e.g. a coil spring, for resetting the control device of the injector.
- the injector according to the invention can be made more compact.
- a further advantage is formed in the separate throttle module, which provides at least a portion of the control chamber of the injector.
- the injector according to the invention can be made even more compact in the axial direction.
- the inlet throttle is preferably arranged in the radial direction of the injector axis.
- the is particularly preferred Inlet throttle is supplied with fuel under pressure via an annular gap arranged between the injector body and the separate throttle module.
- the annular gap is preferably sealed in the axial direction.
- the sealing is particularly preferably carried out by means of cutting edges, which undergo plastic deformation during assembly or cause plastic deformation on the other component, so that a secure seal is made possible.
- the throttle module is particularly preferably arranged in a stepped bore of the injector body with at least two steps.
- the annular gap is sealed in the axial direction at the steps of the stepped bore.
- the cutting edges can be formed either in the throttle module or on the steps in the injector body.
- Another possibility of sealing the annular gap between the injector body and the throttle module is a seal in the radial direction of the injector.
- the radial sealing can take place, for example, by means of an elastic ring seal or an interference fit.
- the invention is described below on the basis of a preferred exemplary embodiment in conjunction with the drawing.
- the single figure shows a schematic sectional illustration of a region of an injector with a throttle module according to the invention.
- the injector 1 comprises an injector body 2, in which a throttle module 5 and a control module 13 are arranged. Furthermore, a nozzle needle 3 is arranged in the injector body 2 and guided in the injector body 2 in the axial direction X-X of the injector.
- the throttle module 5 is designed as a separate component.
- An inlet throttle 6 and an outlet throttle 7 are formed in the throttle module 5.
- a cutout U-shaped in section 8 is formed at the end of the throttle module 5 facing the nozzle needle 3. This recess 8 provides a control chamber 4 between the throttle module 5 and the nozzle needle 3.
- the control module 13 comprises a valve 15 which can be actuated via a control unit, not shown, such as a magnetic element or a piezo actuator.
- the valve 15 closes or releases a valve seat 18 formed on the control module 13.
- the valve 15 is reset by means of a return spring 14 designed as a spiral spring. Furthermore, two returns 16 are provided in the control module 13, which provide a connection to a tank of the vehicle, not shown.
- the spring 14 is arranged in a recess formed in the throttle module 5, so that a very compact design in the axial direction X-X of the injector 1 is possible.
- the supply throttle 6 is supplied with fuel under pressure via a fuel feed line 19 and an annular gap 17 formed between the injector body 2 and the throttle module 5. Since the throttle module 5 is designed as a separate component, a seal must be formed between the throttle module 5 and the injector body 2. As shown in FIG. 1, the throttle module 5 is arranged in a stepped bore of the injector body, which consists of a first step 11 and a second step 12. In this exemplary embodiment, the annular gap 17 is sealed in the axial direction XX of the injector 1. This seal is provided by a first cutting edge 9 and a second cutting edge 10, which are formed on shoulders of the throttle module 5, which correspond to the steps 11, 12 of the stepped bores.
- the cutting edges 9 and 10 are plastically deformed at the steps 11 and 12 of the step bore.
- the surfaces of the two components 2 and 5 adapt ideally to one another, which achieves a very good sealing effect.
- This sealing effect is tight even at very high pressures, such as occur, for example, in common rail injection systems.
- differences in length caused by the production between the distances of the steps 11, 12 of the step bore and / or the distances of the shoulders formed on the throttle module 5 between the cutting edges 9 and 10 can be compensated. This makes it possible for the manufacturing tolerances to be selected in a further area, so that the manufacture of the injector can be made cheaper.
- the throttle module 5 as a separate individual component, the bores for the inlet throttle 6 and the outlet throttle 7 can be carried out quickly and easily with high accuracy.
- the cutting edges 9, 10 provided on the throttle module 5 can be produced very inexpensively, for example by turning.
- the function of the injector 1 is as follows. If you want to inject fuel, the valve 15 is actuated by an actuator (not shown) and moved in the direction of the nozzle needle 3, so that the valve 15 lifts off from its valve seat 18. This opens a connection between the control chamber 4 via the outlet throttle 7 and the open valve 15 to the return 16. As a result, the pressure in the control chamber 4 drops, so that the nozzle needle 3 moves into the control chamber 4 in the axial direction XX of the injector. As a result, the nozzle needle 3 lifts off its seat, so that at least one nozzle is released and fuel is injected through the nozzle into a combustion chamber of an internal combustion engine. The injection takes place as long as the valve 15 remains in its open state. The valve 15 is opened against the spring force of the spring 14.
- valve 15 When the injection is to be ended, the valve 15 is actuated again via the actuator, so that by resetting the spring 14 it returns to its starting position in which the valve seat 18 is closed. As a result, the connection between the control chamber 4 and the return line 16 is interrupted again, so that the original pressure can build up in the control chamber 4, since fuel under pressure is supplied via the inlet throttle 6. As a result, the nozzle needle 3 moves back into its starting position and closes the injector nozzle, so that the injection of fuel has ended.
- the present invention thus relates to an injector for injecting fuel into a combustion chamber of an internal combustion engine.
- the injector comprises an injector body 2, a nozzle needle 3 and a control device 13 in order to control a pressure in a control chamber 4 for actuating the nozzle needle 3.
- the injector 1 further comprises an inlet throttle 6 and an outlet throttle 7, which are in fluid communication with the control chamber 4.
- the inlet throttle 6 and the outlet throttle 7 are arranged in a throttle module 5 formed as a separate component.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10220931 | 2002-05-10 | ||
DE2002120931 DE10220931C1 (de) | 2002-05-10 | 2002-05-10 | Injektor zur Kraftstoffeinspritzung |
PCT/DE2003/001448 WO2003095825A1 (de) | 2002-05-10 | 2003-05-06 | Injektor zur kraftstoffeinspritzung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1504187A1 true EP1504187A1 (de) | 2005-02-09 |
EP1504187B1 EP1504187B1 (de) | 2007-02-28 |
Family
ID=29285278
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03735282A Expired - Lifetime EP1504187B1 (de) | 2002-05-10 | 2003-05-06 | Injektor zur kraftstoffeinspritzung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1504187B1 (de) |
JP (1) | JP2005529267A (de) |
DE (2) | DE10220931C1 (de) |
WO (1) | WO2003095825A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE487057T1 (de) * | 2004-02-25 | 2010-11-15 | Ganser Hydromag | Brennstoffeinspritzventil für verbrennungskraftmaschinen |
DE102008044741B4 (de) | 2008-08-28 | 2010-10-14 | Continental Automotive Gmbh | Verfahren und Steuergerät zum Steuern eines Injektors |
DE102009007213B4 (de) | 2009-02-03 | 2017-06-14 | Continental Automotive Gmbh | Injektorbaugruppe für ein Einspritzventil |
JP6686931B2 (ja) * | 2017-02-22 | 2020-04-22 | 株式会社デンソー | 燃料噴射装置 |
DE102018204492A1 (de) * | 2018-03-23 | 2019-09-26 | Robert Bosch Gmbh | Kraftstoffinjektor |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0807757A1 (de) * | 1994-06-06 | 1997-11-19 | Ganser-Hydromag Ag | Brennstoffeinspritzventil für Verbrunnungskraftmaschinen |
IT1293434B1 (it) * | 1997-07-11 | 1999-03-01 | Elasis Sistema Ricerca Fiat | Dispositivo di tenuta tra due vani soggetti a pressioni diverse, ad esempio in un inietttore di combustibile per motori a comustione |
DE19819666A1 (de) * | 1998-05-02 | 1999-11-04 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
WO2000006892A2 (de) * | 1998-07-31 | 2000-02-10 | Siemens Aktiengesellschaft | Kraftstoffeinspritzventil für brennkraftmaschinen |
DE19936668A1 (de) * | 1999-08-04 | 2001-02-22 | Bosch Gmbh Robert | Common-Rail-Injektor |
DE19936667A1 (de) * | 1999-08-04 | 2001-02-22 | Bosch Gmbh Robert | Common-Rail-Injektor |
DE19937677C2 (de) * | 1999-08-10 | 2003-06-26 | Siemens Ag | Einspritzventil mit verbesserter Dichtflächenanordnung |
-
2002
- 2002-05-10 DE DE2002120931 patent/DE10220931C1/de not_active Expired - Fee Related
-
2003
- 2003-05-06 WO PCT/DE2003/001448 patent/WO2003095825A1/de active IP Right Grant
- 2003-05-06 EP EP03735282A patent/EP1504187B1/de not_active Expired - Lifetime
- 2003-05-06 DE DE50306665T patent/DE50306665D1/de not_active Expired - Lifetime
- 2003-05-06 JP JP2004503793A patent/JP2005529267A/ja active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO03095825A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2003095825A1 (de) | 2003-11-20 |
EP1504187B1 (de) | 2007-02-28 |
DE50306665D1 (de) | 2007-04-12 |
JP2005529267A (ja) | 2005-09-29 |
DE10220931C1 (de) | 2003-11-27 |
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