EP2462335A1 - Vorrichtung zur kraftstoffhochdruckeinspritzung - Google Patents
Vorrichtung zur kraftstoffhochdruckeinspritzungInfo
- Publication number
- EP2462335A1 EP2462335A1 EP10728156A EP10728156A EP2462335A1 EP 2462335 A1 EP2462335 A1 EP 2462335A1 EP 10728156 A EP10728156 A EP 10728156A EP 10728156 A EP10728156 A EP 10728156A EP 2462335 A1 EP2462335 A1 EP 2462335A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- pressure
- valve needle
- armature
- pressure chamber
- 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
- 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
- F02M61/08—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 the valves opening in direction of fuel flow
-
- 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
- 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
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
- F02M51/0642—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto
- F02M51/0653—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature having a valve attached thereto the valve being an elongated body, e.g. a needle valve
-
- 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
- F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
- F02M51/0635—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding
- F02M51/066—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a plate-shaped or undulated armature not entering the winding the armature and the valve being allowed to move relatively to each other or not being attached to each other
-
- 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
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
Definitions
- the present invention relates to a device for high pressure fuel injection, in particular in internal combustion engines with direct injection in
- Valve body are particularly suitable for combustion processes with beam-guided stratified operation. However, with injectors with outward opening
- Valve needle due to the larger diameter seat of the valve needle the hydraulic force generated by the fuel pressure significantly higher than compared to injectors with inwardly opening needle. Because of the high forces and short switching times are therefore usually injectors with
- an injection valve with outwardly opening valve needle is disclosed, which is actuated by a solenoid actuator and having a guide element on the valve needle, which in a
- Valve housing is guided, wherein the diameter of the guide element and a valve seat of the valve needle are selected so that the valve needle in
- the high-pressure injection valves of the prior art are only insufficiently suitable to a simple and inexpensive to produce device for To provide high-pressure injection for internal combustion engines with direct injection in stratified charge mode, which provides a high sealing force between the valve seat and valve needle in the closed state, and can be operated by a magnetic actuator with low actuation force or low power consumption, while a comparable switching dynamics as a
- Claim 1 in contrast, has the advantage that it has a simple and thus more cost-effective design with a magnetic actuator having a valve needle opening outwardly due to a pressure equalization effective at the valve needle with a significantly reduced
- Valve assembly solenoid actuators with low power requirements, especially at injection pressures of 20 MPa or higher, are used, which allow sufficient switching dynamics and a reliable sealing of the valve needle on the valve seat of the valve in the closed state. This is inventively achieved in that when activating a
- Low pressure region of the valve assembly disposed control valve is opened in front of an outwardly opening valve needle.
- Pressure chamber in the low pressure region of the valve assembly is a
- Pressure equalization, d. H. a pressure increase in the low pressure region, which causes a hydraulic force on an active surface of a valve element of the control valve in the opening direction of the valve needle and thereby significantly reduces an opening force of the electromagnetic actuator for the valve needle.
- the control valve is opened by means of a freely movable magnet armature or a component connected to the magnet armature.
- the device according to the invention for high-pressure fuel injection further comprises a driver attached to the valve needle with an armature contact region, wherein the driver is arranged in the starting position at a predetermined distance from the armature and the armature movable on the
- Valve needle is arranged.
- a closing spring for closing the valve needle also restores the armature. This ensures that upon activation of the electromagnetic actuator whose armature first moves from the starting position to the armature contact region of the driver and thereby opens the control valve for pressure equalization, without operating the valve needle. Only when the armature is applied to the driver, the
- Valve needle operated and opened directly via the armature.
- a ring-cylindrical component is attached to the armature, wherein on a free end face of the annular-cylindrical component of the valve seat of the
- Control valve is arranged. This will be a simple design of the
- Valve housing formed a gap seal. As a result, a simple and cost-effective seal between the two components is realized with a small amount of leakage.
- a diameter of the gap seal is formed larger than a diameter of the valve seat of the valve needle.
- Valve needle which causes a reliable sealing of the valve.
- the distance from the starting position of the magnet armature to the driver attached to the valve needle is smaller than a total stroke of the magnet armature, ie, there is a residual stroke for opening the valve needle.
- a first partial stroke the magnet armature from the starting position to the driver is a rapid opening of the control valve for pressure equalization and thus a rapid pressure equalization for the easier opening of the valve needle achieved, which is then opened with a second partial stroke.
- valve element of the control valve acts as another actuated by the armature driver for the return of the valve needle.
- the device for high-pressure fuel injection between the pressure chamber and the low-pressure region further comprises a throttle. This is going to be easy
- a leakage stop valve can be used. As a result, a leakage or return amount of fuel to a fuel return when opening the valve needle is significantly reduced.
- inventive device can be used very economically.
- the leakage check valve has a closing member on the
- Valve needle formed collar-like extension and a seat which is formed on the valve housing. This is a simple structure of the
- Figure 1 is a simplified schematic sectional view of
- FIG. 2 is an enlarged schematic sectional view of a part of the device of FIG. 1,
- Figure 3 is a simplified schematic sectional view of
- Figure 4 is a simplified schematic sectional view of
- FIG. 5 is an enlarged schematic sectional view of part of the device of FIG. 4;
- Figure 6 is a simplified schematic sectional view of
- Figure 7 is a simplified schematic sectional view of a second
- Figure 8 is a simplified schematic sectional view of
- FIG. 9 shows an enlarged schematic sectional view of a part of the device of FIG. 7 with the valve needle closed
- FIG. 10 shows an enlarged schematic sectional view of part of the device of FIG. 7 with the valve needle open.
- Figure 1 shows a schematically simplified sectional view of
- the device 1 in the closed state.
- the device 1 comprises a valve housing 2, an outwardly opening valve needle 3, which is arranged in the valve housing 2 in a pressure chamber 4 filled with fuel.
- This pressure chamber 4 a fuel K is supplied via a fuel inlet 24 under pressure, wherein the valve needle 3 to a valve seat 16 on
- Valve housing 2 seals. Furthermore, the device 1 has a closing spring 5, which returns the valve needle 3 to a starting position, and an electromagnetic actuator 6 with a magnetic coil 63, an inner pole 62, a magnet housing 61 and a movably arranged magnet armature 7, the valve needle 3 via a thereto trained or attached driver 9 is actuated.
- a control valve 8 with a valve element 10 and a valve seat 1 1 is arranged on one of the injection side opposite end portion 29 of the valve needle 3.
- the valve element 10 has a first active surface 13, which faces the pressure chamber 4, and a second active surface 14, which faces a pressure chamber 12, which communicates with a low-pressure region 19.
- the valve element 10 of the control valve 8 is designed to release a connection between the pressure chamber 4 and the pressure chamber 12 and to close, wherein the valve seat 1 1 of the control valve 8 at an end face of an am
- Magnet armature 7 attached annular cylindrical member 17 is arranged.
- Valve housing 2 is a gap seal 18 is formed with a small guide clearance.
- annular cylindrical member 17 through openings 30, 31, formed for the supply of fuel K. Accordingly, when the valve needle 3 is closed and the control valve 8 is closed, the high pressure of the fuel inlet 24 is present supplied fuel in all connected to the pressure chamber 4
- Valve seat 16 is smaller than a diameter d1 of the valve element 10, the valve needle 3 is additionally pressed in addition to the force of the closing spring 5 by a hydraulic force component in the valve seat 16, resulting from this difference in diameter. This is a reliable seal the
- Figure 2 is an enlarged schematic sectional view illustrating a part of the device 1 of Figure 1 in more detail. As can be seen from the illustration of FIG. 2, when the housing is in the closed state
- the closing spring 5 acts on the armature 7 and is supported on the housing 2 from. In this initial position, the axially freely movable armature 7 due to the spring force of the closing spring 5 a
- FIG. 3 shows a schematically simplified sectional view of the device 1 of FIG. 1 when the valve needle 3 is opened.
- the magnetic coil 63 of the electromagnetic actuator 6 is supplied with current (which is illustrated by a lightning-shaped symbol), the magnet armature 7 making a first partial stroke in the direction of the inner pole 62, which corresponds to the dimension of the distance A, until it touches the driver 9.
- the control valve 8 opens, so that fuel K flows from the fuel inlet 24 into the pressure chamber 4 and via the flow opening 31 into the pressure chamber 12 (as illustrated by an arrow B in FIG. 3).
- the pressure in the pressure chamber 12 rises directly and causes a force on the valve needle 3, the ratio of the hydraulically effective first and second active surfaces 13 and 14 am
- Valve element 10 results, which are each subjected to high pressure. This resulting hydraulic force acts in the open control valve 8 in addition to Magnetic force of the armature 7 in the opening direction of the valve needle 3 and reduces the contact pressure of the valve needle 3 on the valve seat 16. The valve needle 3 can now be taken or moved with little force from the armature 3 via the driver 9 in the opening direction, so that the valve needle 3 opens and the injection process can begin.
- FIG. 4 shows a schematically simplified sectional view of the device of FIG. 1 with the valve needle open. Due to the continued energization of the solenoid 63, the magnet armature 7 was pulled together with the valve needle 3 in the opening direction of the device 1 and has a second partial stroke to stop at the inner pole 62 executed, and thereby raised the valve needle 3 from the valve seat 16 to the outside and opened.
- the second partial stroke for opening the valve needle 3 is designed to be larger than the first partial stroke A for opening the control valve 8. The between the valve needle 3 and the
- Valve body 2 outflowing fuel spray is indicated by small arrows C in the
- FIG. 5 is an enlarged schematic sectional view illustrating a part of the device 1 of FIG. 4 in more detail. As can be seen from the illustration of FIG. 5, part of the valve flows when the control valve 8 is open
- This leakage amount through the throttle 21 is defined or limited to a predetermined value, so that the pressure drop in the pressure chamber 12 after the
- FIG. 6 illustrates a schematically simplified sectional illustration of the device of FIG. 1 when the valve needle 3 is closed.
- the valve needle 3 is closed.
- Magnetic coil 63 of the electromagnetic actuator 6 sets, wherein first the control valve 8 is closed. Thereafter, the pressure in the pressure chamber 12 decreases due to the connection to the fuel return 25 via the throttle 21 again, so that the second effective area 14 only with the low pressure from the
- Fuel return 25 is acted upon.
- the first active surface 13 is still with the high pressure in the interior of the annular cylindrical member 17 acted upon.
- a hydraulic closing force is generated, which presses the valve needle 3 in addition to the spring force of the closing spring 5 in the valve seat 16 until the closed state of the valve needle 3 (see Figure 1) is restored and the
- the device 1 can already provide a high switching dynamics with high sealing force with relatively low magnetic forces.
- a device 1 for high-pressure fuel injection according to a second preferred
- FIG. 7 shows a schematically simplified sectional illustration of a second exemplary embodiment of the device 1 according to the invention
- Embodiment of the device 1 according to the invention differs from the first embodiment described above in that in this case between the pressure chamber 12 and the low-pressure region 19 of
- a leakage check valve 26 is arranged.
- the leakage check valve 26 has a collar-like extension 22 of the diameter at the end region 29 of the valve needle 3.
- the leakage check valve 26 closes the pressure chamber in the closed state
- FIG. 9 shows an enlarged schematic sectional view of a part of the device of FIG. 7, which illustrates the pressure conditions when the valve needle 3 is closed.
- an annular groove 27 is in FIG. 9
- Valve housing 2 is formed in an area between the annular cylindrical member 17 and the valve element 10 of the control valve 8 to an unhindered
- Control valve 8 is closed and the leakage check valve 26 is opened.
- the closed valve element 10 of the control valve 8 d. H. in the annular groove 27, the pressure chamber 12 and the adjacent fuel return 25th
- Valve element 10 is applied high pressure (indicated by the reference numeral 28).
- FIG. 8 shows a schematically simplified sectional representation of the second embodiment of FIG. 7 with the valve needle 3 open
- the leakage check valve 26 is closed and the control valve 8 is opened.
- high pressure prevails in the pressure chamber 12, so that the valve needle 3 can be opened with small forces. Since that
- Leakage check valve 26 is closed, no leakage occurs in the
- Extension 22 of the leakage check valve 26 also defines a stroke stop of the opened valve needle 3.
- FIG. 10 shows an enlarged schematic sectional view of a part of the device of FIG. 8, which illustrates the pressure conditions when the valve needle 3 is open.
- the control valve 8 is opened and the leakage blocking valve 26 is closed.
- the high-pressure region 28 is in this case both in the control valve 8 and in the leakage check valve 26 formed while only in the fuel return 25 of the low pressure region 19 is formed.
- Device 1 for high-pressure fuel injection.
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 |
---|---|---|---|
DE200910028234 DE102009028234A1 (de) | 2009-08-05 | 2009-08-05 | Vorrichtung zur Kraftstoffhochdruckeinspritzung |
PCT/EP2010/058580 WO2011015405A1 (de) | 2009-08-05 | 2010-06-17 | Vorrichtung zur kraftstoffhochdruckeinspritzung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2462335A1 true EP2462335A1 (de) | 2012-06-13 |
EP2462335B1 EP2462335B1 (de) | 2013-03-06 |
Family
ID=42371483
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10728156A Not-in-force EP2462335B1 (de) | 2009-08-05 | 2010-06-17 | Vorrichtung zur kraftstoffhochdruckeinspritzung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2462335B1 (de) |
KR (1) | KR101762106B1 (de) |
DE (1) | DE102009028234A1 (de) |
WO (1) | WO2011015405A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101776313B1 (ko) | 2011-06-30 | 2017-09-07 | 현대자동차주식회사 | 저압분사 인젝터 |
KR101765938B1 (ko) | 2011-06-30 | 2017-08-07 | 현대자동차주식회사 | 저압분사 인젝터 |
US8616474B2 (en) * | 2011-09-09 | 2013-12-31 | Continental Automotive Systems, Inc. | High flow outward opening gaseous injector for automotive applications |
DE102013206385A1 (de) * | 2013-04-11 | 2014-10-16 | Robert Bosch Gmbh | Ventil zum Zumessen von Fluid |
US9625264B1 (en) | 2016-01-20 | 2017-04-18 | Denso Corporation | Systems and methods for displaying route information |
JP2024119343A (ja) * | 2023-02-22 | 2024-09-03 | ニコ精密機器株式会社 | 気体燃料インジェクタ |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AUPN391295A0 (en) | 1995-06-30 | 1995-07-27 | Orbital Engine Company (Australia) Proprietary Limited | Fuel injection apparatus |
EP1783358B1 (de) | 2005-11-02 | 2007-12-19 | Delphi Technologies, Inc. | Verfahren zur Auslegung eines Kraftstoffeinspritzventils |
DE102007038430A1 (de) | 2007-08-14 | 2009-02-19 | Robert Bosch Gmbh | Kraftstoffeinspritzventileinrichtung |
-
2009
- 2009-08-05 DE DE200910028234 patent/DE102009028234A1/de not_active Withdrawn
-
2010
- 2010-06-17 EP EP10728156A patent/EP2462335B1/de not_active Not-in-force
- 2010-06-17 KR KR1020127005659A patent/KR101762106B1/ko active IP Right Grant
- 2010-06-17 WO PCT/EP2010/058580 patent/WO2011015405A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2011015405A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2011015405A1 (de) | 2011-02-10 |
KR20120040731A (ko) | 2012-04-27 |
DE102009028234A1 (de) | 2011-02-17 |
EP2462335B1 (de) | 2013-03-06 |
KR101762106B1 (ko) | 2017-07-27 |
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