EP2126335A1 - Injektor mit zusatzkörper - Google Patents
Injektor mit zusatzkörperInfo
- Publication number
- EP2126335A1 EP2126335A1 EP08701473A EP08701473A EP2126335A1 EP 2126335 A1 EP2126335 A1 EP 2126335A1 EP 08701473 A EP08701473 A EP 08701473A EP 08701473 A EP08701473 A EP 08701473A EP 2126335 A1 EP2126335 A1 EP 2126335A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- injector
- additional body
- fuel
- injector according
- additional
- 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 claims abstract description 26
- 238000002485 combustion reaction Methods 0.000 claims abstract description 10
- 210000000078 claw Anatomy 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 239000000243 solution 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
- 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
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
-
- 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
- F02M61/14—Arrangements of injectors with respect to engines; Mounting 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
- 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
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8092—Fuel injection apparatus manufacture, repair or assembly adjusting or calibration
Definitions
- the invention relates to an injector for injecting fuel into a combustion chamber of an internal combustion engine, in particular a common rail injector according to the preamble of claim 1, and to an injection device having such an injector according to claim 11.
- a common rail injector with a long injector body for receiving an actuator is known.
- a fixed to a cylinder head clamping claw is supported with a support surface at a linear contact point of the injector body and thereby acts on the injector with a so-called Pratzkraft axially in the direction of a bore bottom of a bore in the cylinder head, in which the injector is received.
- a high-pressure connection for supplying fuel from a high-pressure fuel accumulator opens into the injector body, the injector body being provided with at least one high-pressure channel and / or at least one pressure chamber. For this reason, the entire injector body must be made of high-pressure-resistant steel, which has a negative effect on the manufacturing costs.
- the invention is therefore based on the object to propose an injector that can be produced with low material costs. Furthermore, the object is to provide an injection device with an inexpensive producible injector.
- the invention is based on the idea not to provide the support point for the installation of a clamping claw on the high-pressure connection for fuel injector body, but on an additional body, which in turn is supported on the injector body, whereby on the additional body on the clamping claw applied Pratzkraft on is transmitted to the injector body.
- the additional body is formed high pressure line free and extends beyond the injector body with advantage in the axial direction.
- the injector structure according to the invention makes it possible to make the actual injector body shorter and at the same time to produce the additional body from non-high-pressure-resistant steel, as a result of which the material and manufacturing costs are considerably reduced.
- a supply line leading to the high-pressure connection which is formed as a separate separate component and is not formed by a channel within the additional body, past the additional body or better by a corresponding recess through the additional body, in particular in the axial direction, is passed.
- the assembly is greatly facilitated if the additional body is provided for this purpose with a lateral recess which allows a connection of the supply line to the injector even with already mounted auxiliary body problem, since the actual connection area is laterally accessible. For example, in this way the lateral access to a mounting flange of the supply line against the high-pressure connection of the injector body spanning the clamping nut is ensured.
- the additional body protects the high-pressure connection during assembly by an at least partially enclosure.
- a simple structure of the injector is obtained when the support point for receiving the preferably axially acting clawing force is arranged on an upper end side of the additional body. In this way, conventional clamps can be used to fix the injector in a bore of the cylinder head.
- an advantage is a construction in which the additional body is defined to the injector body and thus defined aligned to a needle tip of the injector.
- Alignment means are preferably provided for this purpose, which define the auxiliary body defined relative to the injector body.
- the alignment means are formed as centering pins, wherein the centering pins are associated, for example, the additional body and engage in corresponding centering in the injector, or vice versa.
- the centering pins are associated, for example, the additional body and engage in corresponding centering in the injector, or vice versa.
- edge-side guides for the defined inclusion of the additional body and its associated injector body provided in the bore within the cylinder head.
- the alignment means can also be formed by the high-pressure connection on the injector body, which advantageously extends in the axial direction. It is advantageous if the high-pressure connection is arranged eccentrically on the injector body.
- a low-pressure fuel passage is provided in the auxiliary body, which preferably connects a low-pressure region of the injector, for example an armature space of an electromagnetic actuator, to a return port, which is also preferably provided on the auxiliary body.
- a control quantity of fuel and / or a leakage quantity of fuel can be discharged via the return port to a fuel reservoir, from which the fuel is returned to a high-pressure fuel reservoir via a pump device, which is connected via the supply line to the high-pressure port formed on the injector body is.
- the provision of at least one low-pressure fuel channel in the additional body is related to lent the lack of high pressure resistance of the additional body uncritical, since the pressure of the fuel in this low-pressure channel is comparatively low and usually does not exceed a magnitude of 60 bar, in particular of 10 bar ü.
- a channel for receiving an electrical line for supplying the actuator with electrical energy is provided in the additional body.
- a corresponding electrical connection (socket or plug) for connecting this electrical line to an electrical supply line leading to the injector is preferably provided on the additional body.
- the return port and / or the electrical connection are in a frontal recess of the injector, that is, at a distance from the upper end face on which the clamping claw preferably acts force-loading.
- the invention also encompasses an injection device with at least one previously described injector, which is received in a receiving bore within a cylinder head and which, by means of a clamping claw fixed to the cylinder head, in particular screwed into it, is axially biased in the direction of the bottom of the receiving bore, i. is acted upon by a Pratzkraft.
- FIG. 1 shows a sectional view of an injection device with an injector body and an additional body having injector and
- FIG. 2 shows a sectional view along the section line A-A according to FIG. 1.
- Fig. 1 designed as a common rail injector injector 1 is shown.
- the injector 1 is received in a receiving bore 2 of a cylinder head 3 of an internal combustion engine, wherein a tip 4 of a nozzle body 5 protrudes with a nozzle hole arrangement 6 in the combustion chamber 7 of an internal combustion engine.
- the injector 1 is acted upon in the axial direction in the direction of a receiving bore floor 8, or in the direction of an annular disc 9 resting on the receiving base 8, by a clamping claw 10 with a clamping force (clamping force).
- the clamping claw 10 is screwed by means of a clamping screw 11 in an internal thread 12 of a fixing hole 13 in the cylinder head 3.
- the injector 1 comprises the already mentioned nozzle body 5 with a pressure chamber 14 and an axial direction.
- adjustable nozzle needle 15 On the nozzle body 5 is a throttle plate 16 and on this turn a valve plate 17.
- an injector body 18 is arranged with an actuator space 19, an electromagnetic actuator 20 with a magnet coil 21 and a magnet armature 22 being accommodated within the actuator space 19.
- the armature 22 is formed integrally with a valve piston 23 of a control valve 24.
- the nozzle body 5, the throttle plate 16 and the valve plate 17, within which the valve piston 23 of the control valve is received axially adjustable, are clamped by means of a nozzle retaining nut 25 which is penetrated in the axial direction of the tip 4 of the nozzle body 5 against the injector body 18.
- the injector body 18 is provided with an external thread 26, onto which the nozzle clamping nut 25 is screwed.
- the injector body 18, the throttle plate 16, the valve plate 17 and the nozzle body 5 are defined in relation to each other via not shown pointing in the axial direction of fixing pins.
- the fuel pressure in a control chamber 27, in which a force acting on the nozzle needle 15 closing spring 28 is received are influenced in a conventional manner, whereby the nozzle needle 15, with its upper side in the drawing plane 29, the control chamber 27 limited between a closed position in which the nozzle needle 15 rests against a needle seat 30 and the nozzle hole arrangement 6 blocks and an open position in which the fuel flow from the pressure chamber 14 is released through the nozzle hole arrangement 6 into the combustion chamber, are adjusted.
- the pressure chamber 14 via a supply channel 31 with high pressure supplied fuel.
- the control chamber 28 is connected via an inlet throttle 32.
- a flow restrictor 34 is integrated, wherein the flow cross sections of the inlet throttle 32 and the outlet throttle 34 are coordinated such that when open control valve 24, a net outflow of fuel from the control chamber 27 in a low pressure region 35 (FIGS. Actuator 19) results.
- the injector body 18 is provided with a high-pressure connection 36 pointing in the axial direction, via which the supply channel 31 running in the axial direction can be connected to an external supply line 37 for high-pressure fuel.
- a high-pressure connection 36 pointing in the axial direction, via which the supply channel 31 running in the axial direction can be connected to an external supply line 37 for high-pressure fuel.
- the supply line 37 or a fastening flange 38 of the supply line 37 is clamped in the axial direction against the injector body 18 by means of a clamping nut 39, which is screwed onto an external thread 40 of the high-pressure connection 36.
- Adjoining the injector body 18 is an additional body 41, which projects beyond the injector body 18 in the axial direction and which extends substantially parallel to the high-pressure port 36 and the section of the supply line 37 shown in the drawing.
- the additional body 41 is not formed of high-pressure-resistant steel and has no high-pressure channels or spaces.
- On a plane in the drawing upper surface 42 of the additional body 41 is a support point 43 is formed for the clamping claw 10, which thus acts directly in the axial direction kraftbeauf provided on the additional body 41, which in turn transmits the clawing force to the adjacent in the axial direction of the injector body 18.
- a running in the axial direction of low pressure passage 44 is introduced, which continues within the injector body 18 into the actuator 19, so that with open control valve 24, a control amount of fuel from the control chamber 27 through the actuator chamber 19 (low pressure region 35) and can flow from there via the low pressure passage 44 in the auxiliary body 41.
- the additional body 41 is provided for this purpose in a recess 45 with a return port 46, to which a return line 47 is connected, which passes through the clamping claw 10 in the axial direction.
- an electrical connection 51 is arranged within the recess 45.
- Fig. 2 shows the additional body 41 in a sectional view, wherein a lateral recess 52 can be seen, within which the supply line 37 is arranged, which is guided in this way almost in the axial direction by the additional body 41. Furthermore, two spaced-apart centering pins 53 protrude into the additional body 41, which are formed on the injector body 18 and thus align the auxiliary body 41 to the injector body 18 in a defined manner.
- the additional body 41 is provided with three guides spaced from one another in the circumferential direction and provided with guides 54 arranged at an angle of approximately 120 ° to one another. e serve to rest on a peripheral wall 55 of the receiving bore and thus center the injector 1.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007008146A DE102007008146A1 (de) | 2007-02-19 | 2007-02-19 | Injektor mit Zusatzkörper |
| PCT/EP2008/050361 WO2008101748A1 (de) | 2007-02-19 | 2008-01-15 | Injektor mit zusatzkörper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2126335A1 true EP2126335A1 (de) | 2009-12-02 |
| EP2126335B1 EP2126335B1 (de) | 2012-03-14 |
Family
ID=39488332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08701473A Not-in-force EP2126335B1 (de) | 2007-02-19 | 2008-01-15 | Injektor mit zusatzkörper |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2126335B1 (de) |
| AT (1) | ATE549509T1 (de) |
| DE (1) | DE102007008146A1 (de) |
| WO (1) | WO2008101748A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012205701A1 (de) * | 2012-04-05 | 2013-10-10 | Robert Bosch Gmbh | Anordnung umfassend ein Gehäuseteil einer Brennkraftmaschine, einen Kraftstoffinjektor und eine Spannpratze |
| DE102012206486A1 (de) | 2012-04-19 | 2013-10-24 | Robert Bosch Gmbh | Spannpratze zur Festlegung eines Kraftstoffinjektors an einem Zylinderkopf an einer Brennkraftmaschine, Anordnung umfassend eine Spannpratze und Kraftstoffeinspritzsystem umfassend eine Spannpratze |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10025984B4 (de) * | 2000-05-25 | 2014-07-03 | Continental Automotive Gmbh | Spannmittel zum Einspannen eines Einspritzventils |
| DE10155678A1 (de) | 2001-11-13 | 2003-05-22 | Bosch Gmbh Robert | Einspannvorrichtung für ein Kraftstoffeinspritzventil |
| JP2006037866A (ja) * | 2004-07-28 | 2006-02-09 | Nissan Motor Co Ltd | 燃料噴射弁の固定構造 |
| DE102005011574A1 (de) * | 2005-03-14 | 2006-09-21 | Robert Bosch Gmbh | Zwischenelement für ein Brennstoffeinspritzventil |
| EP1884657B1 (de) * | 2006-08-04 | 2009-07-15 | Continental Automotive GmbH | Befestigungsvorrichtung zur Befestigung eines Brennstoffeinspritzventils an einem Zylinderkopf einer Brennkraftmaschine |
-
2007
- 2007-02-19 DE DE102007008146A patent/DE102007008146A1/de not_active Withdrawn
-
2008
- 2008-01-15 AT AT08701473T patent/ATE549509T1/de active
- 2008-01-15 WO PCT/EP2008/050361 patent/WO2008101748A1/de not_active Ceased
- 2008-01-15 EP EP08701473A patent/EP2126335B1/de not_active Not-in-force
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2008101748A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE549509T1 (de) | 2012-03-15 |
| WO2008101748A1 (de) | 2008-08-28 |
| DE102007008146A1 (de) | 2008-08-21 |
| EP2126335B1 (de) | 2012-03-14 |
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