EP2201241A1 - Fuel injection valve - Google Patents
Fuel injection valveInfo
- Publication number
- EP2201241A1 EP2201241A1 EP08804862A EP08804862A EP2201241A1 EP 2201241 A1 EP2201241 A1 EP 2201241A1 EP 08804862 A EP08804862 A EP 08804862A EP 08804862 A EP08804862 A EP 08804862A EP 2201241 A1 EP2201241 A1 EP 2201241A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel injection
- injection valve
- cover part
- valve according
- magnetic circuit
- 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
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
- F02M63/0012—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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
- F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
Definitions
- the invention relates to a fuel injection valve according to the preamble of the main claim.
- a fuel injection valve for fuel injection systems of internal combustion engines comprising an excitable actuator in the form of an electromagnetic circuit with a magnetic coil, an outer magnetic circuit component and a movable armature for actuating a valve closing body provided with a provided on a valve seat body valve seat cooperates, has.
- the fuel injection valve has no tubular core serving as a fuel inlet nozzle and inner pole, which is surrounded by the magnetic coil.
- the outer magnetic circuit component is designed pot-shaped, wherein the magnetic circuit component is installed in the valve so that it is slipped over the magnetic coil.
- the electromagnetic circuit is closed by a closure part, which is inserted from below into the magnetic circuit component.
- the movable armature is guided in the bobbin or in an inner opening of the closure part.
- the entire actuator is enclosed by a plastic extrusion, which also forms an inflow-side connecting piece.
- Fuel injection valve is characterized in that both the inlet-side connecting piece and serving as a valve seat carrier connecting part as deep-drawn sheet metal parts are executed.
- the sheet metal parts are formed by a deformation stress exceeding the yield value of their material and connected together by means of connecting pins to form a valve housing.
- the fuel injection valve according to the invention with the characterizing features of the main claim has the advantage that in a simple and cost-effective manner, a particularly compact structure in the region of the magnetic circuit and in the areas upstream and downstream of the magnetic circuit can be realized, so that a very small, handy injection valve arises.
- a simple structural solution is provided with which a sealed dense coil space is created for coil sealing by a very simple design, serving as the inner pole of the magnetic circuit cover part is inserted into an outer magnetic circuit component. Since the components of the electromagnetic circuit as well as the connected to the magnetic circuit components connecting parts have very simple geometries and have a low-cost design, the fuel injector is particularly favorable in the production of the items and the assembly. The very short one
- Magnetic circuit works very effectively with low losses and thus has best functional properties.
- the construction according to the invention makes it possible to produce a fuel injection valve with a total length of ⁇ 30 mm.
- the sleeve body is a metal non-magnetic intermediate part or forms as a ferritic component, a magnetic throttle point in the magnetic circuit.
- the cover part is firmly connected to the sleeve body, in particular by means of a weld.
- Length variants of the fuel injection valve according to the invention are very easy to produce in large numbers by differently long and specifically shaped connecting pieces, valve seat carrier, valve needles and spacers.
- FIG. 1 shows a fuel injection valve in two variants of embodiments according to the invention in the region of the electromagnetic circuit.
- the electromagnetically operable valve in the form of an injector for fuel injection systems of mixture-compression spark-ignition internal combustion engines shown in FIG. 1 has an electromagnetic circuit with a solenoid coil 1 which does not surround a tubular core serving as a fuel inlet port and inner pole, as is common in such injectors , Rather, the magnetic coil 1 surrounds a thin-walled cylindrical sleeve body 2.
- a bobbin 3 receives a winding of the magnetic coil 1 on.
- the bobbin 3 made of plastic passes directly into a mitgespritzten electrical connection plug 5, not shown in detail, via which the electrical contacting of the magnetic coil 1 takes place.
- the sleeve body 2 is arranged concentrically to a valve longitudinal axis 10, wherein the sleeve body 2 is either a metal non-magnetic intermediate part, which is made for example of stainless steel, or forms a magnetic throttle body in the magnetic circuit as a ferritic component.
- the bobbin 3 Surrounded is the bobbin 3 with the magnetic coil 1 of an outer cup-shaped Magnetic circuit component 11, which is part of the valve housing.
- a cover part 14 is inserted into the magnetic circuit component 11, which serves as the inner pole of the magnetic circuit.
- the lid part 14 is in turn connected to the sleeve body 2 by means of a second weld 15 tightly and firmly. With the cover part 14, the sleeve body 2 and the outer magnetic circuit component 11, a sealed, dense coil space is created in this way, which is interrupted only in the area of the electrical contacting of the magnetic coil 1 by a recess 16 in the cover part 14.
- the sleeve body 2 has an L-shape in cross-section, in which an annular collar 9 is bent away from the otherwise cylindrical course in the circumferential direction. Accordingly, the weld 15, 15a (left in FIG. 1) can be set on a horizontal end face 17 of the cover part 14. In this embodiment, the cover part 14 extends as a largely flat disc. In a second embodiment (on the right in FIG. 1), the cover part 14 is also disk-shaped, but formed with a cylindrical extension 8, whereby it is possible to attach the weld seam 15, 15b to an axially parallel peripheral surface 18 of the extension 8 of the cover part 14.
- a thin-walled tubular connecting part Downstream of the magnetic circuit component 11 extends a thin-walled tubular connecting part, which is designed here as a valve seat carrier 19, which is fixedly connected to the magnetic circuit component 11 via a third weld 20.
- the component bottom 12 of the magnetic circuit component 11 has an annular extension 22 which protrudes from the magnetic circuit component 11 such that the weld seam 20 can be attached in this region without impairing the magnetic coil 1 or other components for connection to the valve seat carrier 19.
- an axially movable valve needle 21 is arranged in the valve seat carrier 19, at the downstream end 23 of the valve needle 21, a spherical valve closing body 24 made of metal or ceramic is provided. The actuation of the injection valve is electromagnetically.
- the electromagnetic circuit with the solenoid coil 1, the outer magnetic circuit member 11, the cover member 14 and an armature serves 27.
- the cup-shaped armature 27 is, for example formed integrally with a valve needle shaft 21a (right in Figure 1) or inserted at a stage 28 of the valve needle shaft 21a and there fixedly connected to this (left in Figure 1).
- the guide of the armature 27 during its axial movement takes place along the inner wall of the sleeve body 2.
- the solenoid 1 end facing away from the valve seat support 19 is a cylindrical valve seat body 29 having a fixed valve seat 30, mounted by welding tight.
- the valve seat body 29 is made of metal or ceramic and sealed by a sealing ring 31.
- the spherical valve closing body 24 of the valve needle 21 cooperates with the valve seat 30 of the valve seat body 29, which tapers frustoconically in the flow direction.
- the valve seat body 29 On its lower end face, the valve seat body 29 is provided with a spray hole disk 34 of flat design, for example, and of e.g. cup-shaped holding disc 35 fixed and tight by a z. B. connected by means of a laser weld.
- the spray perforated disk 34 at least one, for example, four ejection openings 39 formed by eroding or punching are provided.
- a plurality of flow-through grooves 40 are provided circumferentially in the valve seat body 29 in the region of a guide section.
- the arrangement of the cover part 14 in the outer magnetic circuit component 11 and on the sleeve body 2 is crucial for the stroke of the valve needle 21.
- the one end position of the valve needle 21 is fixed at non-energized solenoid coil 1 by the contact of the valve closing body 24 to the valve seat 30 of the valve seat body 29 while the other end position of the valve needle 21 results in energized solenoid coil 1 by the system of the armature 27 at the lower end of the cover part 14, which is provided there eg with a wear protection layer.
- the cover part 14 is firmly connected to a thin-walled connecting piece 41 by means of a fourth weld seam 38.
- the connecting piece 41 extends in a tubular manner and can be formed in a targeted manner with respect to the inner diameter via steps at different points, as can be seen in FIG. Variable lengths for the connecting pieces 41 can be used.
- the connecting piece 41 either engages in a groove 36 on the cover part 14 (on the left in FIG. 1) or sits on a shoulder 37 of the cover part 14 (on the right in FIG. 1).
- the shoulder 37 may be formed with a width in the wall thickness of the connecting piece 41, so that the connecting piece 41 is flush with the inner bore of the cover member 14 seated on this.
- a setting 43 is fitted in a concentric with the valve longitudinal axis 10 extending flow bore 42 of the connecting piece 41, which serves to supply the fuel in the direction of the valve seat 30, except for the return spring 26, a setting 43 is fitted.
- the adjusting member 43 is used to adjust the spring bias of the voltage applied to the adjusting element 43 return spring 26, which in turn is supported with its opposite side of the armature 27, wherein an adjustment of the dynamic Abspritzmenge with the adjustment 43.
- a fuel filter 44 is integrated directly in the adjusting element 43.
- the fuel injection valve according to the invention is characterized by a particularly compact design in the region of the magnetic circuit as well as in the areas upstream and downstream of the magnetic circuit, so that a very small, handy injection valve is formed.
- Both the connecting piece 41 and the valve seat carrier 19 are designed as thin-walled deep-drawn components which inflow the inflow valve and downstream with bent annular collar 45, 46 limit.
- These annular collars 45, 46 each form a boundary of an annular groove 47, 48, in each of which a sealing ring 49, 50 in the form of an O-ring for sealing the fuel injection valve to the outside (fuel rail, intake manifold) is introduced.
- FIG. 1 are two variants of the fuel injection valve according to the invention shown. Length variants of the fuel injection valve are very easy to produce in large numbers by differently long and specifically shaped connecting piece 41, valve seat carrier 19, valve needles 21 and spacers 52, 53. A color coding of the fuel injectors is very easy on appropriately colored spacers 52, 53 possible. A plastic extrusion of the fuel injection valve can be omitted.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007049946A DE102007049946A1 (en) | 2007-10-18 | 2007-10-18 | Fuel injector |
PCT/EP2008/063003 WO2009053221A1 (en) | 2007-10-18 | 2008-09-29 | Fuel injection valve |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2201241A1 true EP2201241A1 (en) | 2010-06-30 |
EP2201241B1 EP2201241B1 (en) | 2011-12-21 |
Family
ID=40351980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08804862A Not-in-force EP2201241B1 (en) | 2007-10-18 | 2008-09-29 | Electromagnetically driven fuel injection valve |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2201241B1 (en) |
AT (1) | ATE538303T1 (en) |
DE (1) | DE102007049946A1 (en) |
WO (1) | WO2009053221A1 (en) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3704542A1 (en) * | 1987-02-13 | 1988-08-25 | Vdo Schindling | Fuel injection valve |
US5150842A (en) | 1990-11-19 | 1992-09-29 | Ford Motor Company | Molded fuel injector and method for producing |
EP0781915A1 (en) * | 1995-12-26 | 1997-07-02 | General Motors Corporation | Fuel injector |
DE19712922B4 (en) | 1997-03-27 | 2005-08-11 | Robert Bosch Gmbh | Fuel injector |
-
2007
- 2007-10-18 DE DE102007049946A patent/DE102007049946A1/en not_active Withdrawn
-
2008
- 2008-09-29 AT AT08804862T patent/ATE538303T1/en active
- 2008-09-29 EP EP08804862A patent/EP2201241B1/en not_active Not-in-force
- 2008-09-29 WO PCT/EP2008/063003 patent/WO2009053221A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2009053221A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102007049946A1 (en) | 2009-04-23 |
ATE538303T1 (en) | 2012-01-15 |
WO2009053221A1 (en) | 2009-04-30 |
EP2201241B1 (en) | 2011-12-21 |
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