WO2001007777A1 - Brennstoffeinspritzventil - Google Patents
Brennstoffeinspritzventil Download PDFInfo
- Publication number
- WO2001007777A1 WO2001007777A1 PCT/DE2000/002459 DE0002459W WO0107777A1 WO 2001007777 A1 WO2001007777 A1 WO 2001007777A1 DE 0002459 W DE0002459 W DE 0002459W WO 0107777 A1 WO0107777 A1 WO 0107777A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- damping element
- valve seat
- fuel
- damping
- Prior art date
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
- 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
- F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
-
- 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
-
- 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
- F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
- F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic means
Definitions
- the invention relates to a fuel injector according to the preamble of the main claim.
- Disc spring is clamped downstream of the valve seat body between this and a shoulder of the valve seat carrier.
- the disc spring biases the valve seat body against a valve needle interacting with a valve seat surface.
- the disk spring is intended to ensure that the valve closing body, which is formed in one piece with the valve needle, strikes the valve seat surface gently and that a rebound of the valve needle on the valve seat body is damped.
- this type of damping has the disadvantage that the valve seat body swings through in the spray direction after the valve closing body strikes, while the valve closing body either stops or, due to the pulse reversal, even moves back from the valve seat body against the spray direction.
- Valve bumpers can therefore with this type of Fuel injection valve even occur to an increasing extent.
- the fuel injector according to the invention with the characterizing features of the main claim has the advantage that possible bouncing of the valve needle can be avoided even more effectively.
- the movement of the valve needle is damped hydraulically by displacing a hydraulic cushion between the damping element and a downstream element. This hydraulic damping leads to reduced noise when the fuel injector is operating.
- the damped impact of the valve needle on the valve seat increases the durability.
- damping element in the form of a disk is particularly advantageous to design the damping element in the form of a disk as a plate spring.
- FIG. 1 shows an exemplary embodiment of a fuel injection valve according to the invention in a sectional view
- FIG. 2 shows an injection-side guide and seat area on a changed scale
- FIG. 3 shows a damping element according to the invention in a top view
- FIG. 4 shows the section identified by IV in FIG 5 shows the section marked V in FIG. 1 with the valve closed.
- the electromagnetically actuated valve in the form of an injection valve for fuel injection systems of spark-ignition internal combustion engines has a tubular, largely hollow cylindrical core 2, which is at least partially surrounded by a magnetic coil 1 and serves as the inner pole of a magnetic circuit.
- the fuel injection valve is suitable especially as a high-pressure injection valve for the direct injection of fuel into a combustion chamber of an internal combustion engine.
- a stepped bobbin 3 made of plastic takes a winding Magnet coil 1 and in connection with the core 2 and an annular, non-magnetic intermediate part 4 with an L-shaped cross section partially surrounded by the magnet coil 1 enables a particularly compact and short structure of the injection valve in the region of the magnet coil 1.
- a continuous longitudinal opening 7 is provided in the core 2 and extends along a longitudinal valve axis 8.
- the core 2 of the magnetic circuit also serves as a fuel inlet connection, the longitudinal opening 7 being one
- An outer metallic (for example ferritic) housing part 14 which closes the magnetic circuit as an outer pole or outer guide element and completely surrounds the magnet coil 1 at least in the circumferential direction, is firmly connected to the core 2 above the magnet coil 1.
- a fuel filter 15 is provided on the inlet side, which ensures that those fuel components are filtered out which, due to their size, could cause blockages or damage in the injection valve.
- the fuel filter 15 is, for. B. fixed by pressing in the core 2.
- the core 2 forms with the housing part 14 the inlet-side end of the fuel injector, the upper housing part 14, for example, just extending beyond the solenoid coil 1, seen downstream in the axial direction.
- a lower tubular housing part 18 connects tightly and firmly, which, for. B. an axially movable valve part consisting of an armature 19 and a rod-shaped valve needle 20 or an elongated valve seat support 21 or receives.
- the two housing parts 14 and 18 are, for. B. firmly connected to each other with a circumferential weld.
- Valve seat carrier 21 firmly connected to each other by screwing; Welding, soldering or flanging are also possible joining methods.
- the sealing between the housing part 18 and the valve seat support 21 is carried out, for. B. by means of a sealing ring 22.
- the valve seat support 21 has an inner through opening 24 over its entire axial extent, which runs concentrically to the longitudinal axis 8 of the valve.
- valve seat carrier 21 With its lower end 25, which also represents the downstream termination of the entire fuel injection valve, the valve seat carrier 21 surrounds a disk-shaped valve seat element 26 fitted in the through opening 24 with a frustoconical tapering shape downstream
- Valve seat surface 27 In the through opening 24, the z. B. rod-shaped, a largely circular cross-section valve needle 20 is arranged, which has a valve closing section 28 at its downstream end.
- Downstream of the valve seat surface 27, at least one outlet opening 32 for the fuel is introduced in the valve seat element 26.
- the outlet opening 32 extends in the exemplary embodiment 1 concentric to the valve longitudinal axis 8 and ends at a flat lower end face of the valve seat element 26 running perpendicular to the valve longitudinal axis 8.
- the injection valve is actuated electromagnetically in a known manner.
- a piezo actuator or a magnetostrictive actuator as excitable actuation elements are also conceivable.
- Actuation via a controlled pressure-loaded piston is also conceivable.
- the electromagnetic circuit with the magnet coil 1, the core 2, the housing parts 14 and 18 and the armature serves to axially move the valve needle 20 and thus to open against the spring force of a return spring 33 arranged in the longitudinal opening 7 of the core 2 or to close the injection valve 19.
- the anchor 19 is with the
- Valve closing section 28 facing away from the valve needle 20 z. B. connected by a weld and aligned to the core 2.
- a guide opening 34 provided in the valve seat support 21 at the end facing the armature 19 and on the other hand a disk-shaped guide element 35 with a dimensionally accurate guide opening 55 arranged upstream of the valve seat element 26 19 is surrounded by the intermediate part 4 during its axial movement.
- Two further disk-shaped elements namely a swirl element 47 and a damping element 48, are arranged between the guide element 35 and the valve seat element 26, so that all four elements 35, 47, 48 and 26 lie largely on top of one another and are accommodated in the valve seat carrier 21.
- the four disc-shaped elements 35, 47, 48 and 26 are firmly bonded to one another, this being done, for example, by means of a weld seam 60 attached to the outer circumference of the elements 35, 47, 48 and 26 or by means of several weld points or short weld seams 60 distributed over the circumference.
- An adjusting sleeve 38 inserted, pressed or screwed in the longitudinal opening 7 of the core 2 serves to adjust the spring preload of the return spring 33, which is located on the adjusting sleeve 38 with its upstream side and is supported with its opposite side on the armature 19 by means of a centering piece 39.
- armature 19 one or more bore-like flow channels 40 are provided, through which the fuel can pass through opening 24 from longitudinal opening 7 in core 2 via connecting channels 41 formed downstream of flow channels 40 near guide opening 34 in valve seat support 21 to m.
- the stroke of the valve needle 20 is predetermined by the installation position of the valve seat element 26.
- One end position of the valve needle 20 is determined when the solenoid coil 1 is not energized by the contact of the valve closing section 28 on the valve seat surface 27 of the valve seat element 26, while the other end position of the valve needle 20 when the solenoid coil 1 is energized by the contact of the armature 19 on the downstream end face of the Kerns 2 results.
- the surfaces of the components in the latter stop area are chromed, for example.
- Plastic extrusion 44 are provided. The
- Plastic encapsulation 44 can also be used for other
- Components e.g. housing parts 14 and 18 of the
- Plastic extrusion 44 runs an electrical
- connection cable 45 via which the solenoid 1 is energized.
- the plastic encapsulation 44 projects through the upper housing part 14, which is interrupted in this area.
- FIG. 2 shows a guide and seating area enlarged and shown in a slightly different configuration from FIG. 1, the parts that remain the same or have the same function as in FIG. 1 being identified by the same reference numerals.
- the valve seat element 26 has a circumferential flange 64 which engages under the downstream end of the valve seat carrier 21.
- the outlet opening 32 is e.g. introduced obliquely inclined to the valve longitudinal axis 8, which ends downstream in a convexly curved spray region 66.
- the guide element 35 has a dimensionally accurate inner guide opening 55 through which the valve needle 20 moves during its axial movement. From the outer circumference, the guide element 35 has a plurality of recesses 56 distributed over the circumference, one of which
- the damping element 48 clamped between the swirl element 47 and the valve seat element 26 is disc-shaped with a small thickness and is essentially similar 777
- the damping element 48 is attached cohesively e.g. by means of a plurality of welding points or welding seams 60 set on the outer circumference, which also ensure a firm connection of guide element 35, swirl element 47 and valve seat element 26.
- the damping element 48 is made of a wear-resistant, resilient and rustproof metallic material.
- the valve seat element 26 and the damping element 48 are designed in such a way that the damping element 48 can perform a slight axial movement in a partial area when the valve is opened and closed. This is described below with reference to FIGS. 4 and 5.
- a damping element 48 is shown in a plan view.
- the damping element 48 represents an annular disk which has an inner through opening 70.
- Valve needle 20 with valve closing section 28 extends through this through opening 70.
- the damping element 48 has a plurality of radially consecutive sections.
- the through opening 70 is directly surrounded by a sealing section 71.
- a boundary wall 72 of the through opening 70 is slightly conical, the opening width of the through opening 70 being reduced in the downstream direction.
- the boundary wall 72 has a different conicity than the valve closing section 28 in this area, so that there is a difference angle between the two adjacent surfaces 28, 72. From the boundary wall 72 extends together with the
- Sealing section 71 is a curved section 73 which is S-shaped in cross section and to which a radially outer, flat fastening section 74 is connected. Since the S-shaped section 73 also has an axial extension component, a cup-shaped damping element 48 is also present a recessed interior.
- the passage opening 70 with the boundary wall 72 and the sealing section 71 lie axially offset from the fastening section 74, while the section 73 connects the sections 71 and 74.
- the valve seat element 26 has an upper end face 77 which faces the swirl element 47 and which does not run exactly perpendicular to the longitudinal axis 8 of the valve, but has a slight inclination. In this way, between the swirl element 47 and the valve seat element 26
- the valve seat element 26 is formed in its central region upstream of the valve seat surface 27 with a recess 78 which largely has the contour of the section 73 and the sealing section 71 of the damping element 48.
- Figure 4 shows that marked IV in Figure 1
- Section with the valve open and Figure 5 shows the section marked V in Figure 1 with the valve closed.
- the damping element 48 with its fastening section 74 lies directly flat on the lower end face of the swirl element 47.
- This gap 79 is filled with fuel due to the capillary action.
- the damping element 48 With its boundary wall 72 of the through opening 70, the damping element 48 does not abut the valve closing section 28, so that there is a narrow annular gap 80, which widens downstream due to the difference angle, between the boundary wall 72 and the surface of the valve closing section 28.
- the valve needle 20 moves along the longitudinal axis 8 of the valve in the direction of the valve seat surface 27.
- the resilient damping element 48 is carried slightly, at least to such an extent that the valve needle 20 with its valve closing section 28 lies against an upper, annular edge the boundary wall 72 comes, which represents a sealing edge 27 v . In this way, the volume of the gap 79 is reduced during the closing process.
- Damping element 48 completely takes over the sealing function when the valve is closed.
- the damping element 48 is not in contact with the recess 78 of the valve seat element 26, as shown in FIG. 5.
- Sealing edge 27 * are e.g. executed so precisely that they both take over the sealing function of the valve when the valve closing section 28 is in contact.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001512180A JP2003505645A (ja) | 1999-07-27 | 2000-07-26 | 燃料噴射弁 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19935263.1 | 1999-07-27 | ||
DE1999135263 DE19935263A1 (de) | 1999-07-27 | 1999-07-27 | Brennstoffeinspritzventil |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001007777A1 true WO2001007777A1 (de) | 2001-02-01 |
Family
ID=7916228
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2000/002459 WO2001007777A1 (de) | 1999-07-27 | 2000-07-26 | Brennstoffeinspritzventil |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP2003505645A (de) |
CZ (1) | CZ20011078A3 (de) |
DE (1) | DE19935263A1 (de) |
WO (1) | WO2001007777A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU782247B2 (en) * | 1999-10-14 | 2005-07-14 | Basf Aktiengesellschaft | Synergistic herbicidal methods and compositions |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10049034B4 (de) * | 2000-10-04 | 2005-08-04 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE10124747A1 (de) * | 2001-05-21 | 2002-11-28 | Bosch Gmbh Robert | Brennstoffeinspritzventil |
DE102004059974A1 (de) * | 2004-11-23 | 2006-06-01 | Siemens Ag | Düsenbaugruppe und Einspritzventil |
JP4528701B2 (ja) * | 2005-09-13 | 2010-08-18 | 日立オートモティブシステムズ株式会社 | 噴射弁及びオリフィスの加工方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1110102A (en) * | 1963-11-26 | 1968-04-18 | Ruston & Hornsby Ltd | Improvements in fuel injection equipment for internal combustion engines |
US4365747A (en) * | 1979-09-08 | 1982-12-28 | Robert Bosch Gmbh | Electromagnetically actuatable fuel injection valve |
US5207384A (en) * | 1991-09-18 | 1993-05-04 | Siemens Automotive L.P. | Swirl generator for an injector |
US5236173A (en) | 1992-03-11 | 1993-08-17 | Siemens Automotive L.P. | Armature bounce damper |
US5271565A (en) * | 1992-12-18 | 1993-12-21 | Chrysler Corporation | Fuel injector with valve bounce inhibiting means |
WO1997028392A2 (en) * | 1996-01-31 | 1997-08-07 | Siemens Automotive Corporation | Groove means in a fuel injector valve seat |
-
1999
- 1999-07-27 DE DE1999135263 patent/DE19935263A1/de not_active Withdrawn
-
2000
- 2000-07-26 JP JP2001512180A patent/JP2003505645A/ja active Pending
- 2000-07-26 WO PCT/DE2000/002459 patent/WO2001007777A1/de not_active Application Discontinuation
- 2000-07-26 CZ CZ20011078A patent/CZ20011078A3/cs unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1110102A (en) * | 1963-11-26 | 1968-04-18 | Ruston & Hornsby Ltd | Improvements in fuel injection equipment for internal combustion engines |
US4365747A (en) * | 1979-09-08 | 1982-12-28 | Robert Bosch Gmbh | Electromagnetically actuatable fuel injection valve |
US5207384A (en) * | 1991-09-18 | 1993-05-04 | Siemens Automotive L.P. | Swirl generator for an injector |
US5236173A (en) | 1992-03-11 | 1993-08-17 | Siemens Automotive L.P. | Armature bounce damper |
US5271565A (en) * | 1992-12-18 | 1993-12-21 | Chrysler Corporation | Fuel injector with valve bounce inhibiting means |
WO1997028392A2 (en) * | 1996-01-31 | 1997-08-07 | Siemens Automotive Corporation | Groove means in a fuel injector valve seat |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU782247B2 (en) * | 1999-10-14 | 2005-07-14 | Basf Aktiengesellschaft | Synergistic herbicidal methods and compositions |
Also Published As
Publication number | Publication date |
---|---|
JP2003505645A (ja) | 2003-02-12 |
DE19935263A1 (de) | 2001-02-01 |
CZ20011078A3 (cs) | 2002-01-16 |
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