EP1327065A1 - Magnetventilbetätigtes steuermodul zur fluidkontrolle bei einspritzsystemen - Google Patents
Magnetventilbetätigtes steuermodul zur fluidkontrolle bei einspritzsystemenInfo
- Publication number
- EP1327065A1 EP1327065A1 EP01978189A EP01978189A EP1327065A1 EP 1327065 A1 EP1327065 A1 EP 1327065A1 EP 01978189 A EP01978189 A EP 01978189A EP 01978189 A EP01978189 A EP 01978189A EP 1327065 A1 EP1327065 A1 EP 1327065A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve body
- control module
- control
- valve
- recesses
- 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
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid 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
- 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
Definitions
- Solenoid valve actuated control module for fluid control in injection systems
- An injection system configured to meet the legal requirements requires actuation devices which, on the one hand, must have a long service life and, on the other hand, must have high operational reliability.
- short control valve activation times must be realizable via the actuating devices; it is also desirable to control the valve control bodies of the control valves in different positions in order to build up or reduce the injection pressure in a controlled manner.
- piezo actuators are used in injection systems, short response and switching times can be achieved for control valves of an injection system. However, it is still unclear whether the piezo actuators already used have the durability required for an injection system and whether the operational reliability is still present after long periods of operation.
- the piezo actuators When operated on internal combustion engines, particularly in internal combustion engines used on commercial vehicles, the piezo actuators are exposed to the harshest operating conditions, such as temperature fluctuations and shocks.
- Commercial vehicles are usually designed for a lifespan of 1 million and more kilometers, so that the durability of an injection system must also be designed for this lifespan.
- An injector for an injection system on internal combustion engines is known from EP 0 823 549 A2.
- the injector housing according to this technical solution there are two in a row lying control valves arranged, which are controlled by a magnet. The activation of one of the two valves inevitably results in the actuation of the further valve.
- the advantage of this solution is the pressure balance of the needle control valve in all operating states, whereas this solution has the disadvantage that it is not possible to decouple the lifting processes of the two valves connected in series, so that the possibilities of influencing the shaping of the injection process are limited.
- the solution proposed according to the invention offers the advantage of creating a compact control module by means of a miniaturized control part design.
- the durability and reliability of electromagnets used as switching devices is an undisputed and generally recognized technical fact. Due to the miniaturization of the components with a corresponding flux density to be realized in the electromagnetic coil in cooperation with the magnetic yoke surrounding the coil, such a degree of compactness of the control module in an injection system is achieved that the accommodation of such a control module in existing systems, for example on commercial vehicle engines, without serious changes in installation space is possible.
- the actuators of the control module proposed according to the invention can be switched depending on their function so that both control valves of the control module are closed when deenergized or both control valves are de-energized in the open position.
- This is preferably achieved by spring elements provided on the control valve bodies of the control valves.
- it is also possible to keep one of the two control valves closed when de-energized and to place the other control valve in the open state when de-energized.
- the magnet yoke - the non-moving part of the electromagnet - can either be arranged in the valve body of the control module through a corresponding recess for accommodating the coil. This allows the material of the valve body, which contributes to cost savings use as magnetic conductor at the same time. It is also possible to arrange the recesses which receive the solenoid coils in the valve body in separate components which can be made, for example, of a high-quality, soft magnetic material. A combination of these two arrangement or accommodation possibilities of the solenoid coils of an electromagnet is also possible.
- inserts holding the solenoid coils are installed in the valve body of a control module, these can be connected to the valve body by various methods.
- the insert element can be positively connected to the recess for the magnetic coil-receiving insert element with the valve body by fluid connection, such as, for example, soldering or welding.
- valve needles for both needles can be manufactured with the same diameter in a manner which advantageously favors the manufacturing costs. As a result, identical manufacturing methods can be used. Furthermore, the principle of using the same parts can have a positive impact on storage and storage costs.
- FIG. 1 shows a control module with recesses for magnetic coils which are accommodated in parallel but are offset in height from one another
- FIG. 2 shows a control module according to FIG. 1, in which a separate receiving element for the magnet coil is let into the valve body on one of the control parts,
- FIG. 3 shows the parallel arrangement of two control parts in the valve body with separate receiving inserts for receiving the magnetic coils
- Fig. 4 shows the parallel arrangement of two control valves in the control module, the actuating solenoids are both received in recesses in the valve body and
- Fig. 5 shows a variant of a control module with control valves, in which pressure springs, the control valve body are arranged in their upper region surrounding.
- FIG. 1 shows a section through the control module proposed according to the invention with recesses for the valve control bodies which actuate electromagnets and which are accommodated in the control module in parallel, but arranged at different heights.
- the sectional view according to FIG. 1 shows that in a valve body 2 of the control module 1 that is accommodated symmetrically to its axis of symmetry 3, two control valves 5, 17 acting in parallel to one another are accommodated.
- the first control valve 5 comprises a valve needle 6, which extends essentially in the vertical direction.
- the valve needle 6 is designed as a rotationally symmetrical component, symmetrical to the line of symmetry 11.
- annular magnet armature 7 is accommodated which the valve needle 6 above a taper 8 carried out on this completely.
- a circumferential recess 9 is formed for receiving the magnet coil of an electromagnet.
- the area of the valve body 2 surrounding the recess 9 in the valve body 2 can therefore be regarded as the magnetic yoke of the electromagnet.
- a leakage oil chamber 10 is formed around the constriction point of the valve needle 6.
- valve seat 12 closed by the seat surface of the valve needle 6, via which the annular space 14 formed in the valve body 2 can be relieved of pressure.
- a mandrel 15 is formed, which serves as a guide surface for the first turns of a spring element 16, which is also mounted in the valve body 2 as a restoring element.
- a second control valve 17 is accommodated in the valve body 2 and is arranged offset in height with respect to the first control valve 5 already described.
- a bore 18 is received in the valve body 2 of the control module 1, in which a ring-shaped insert element 19 is embedded.
- the annularly configured insert element 19 which consists of a high-quality, soft magnetic material, there is a recess 20 for the coil of an electromagnet.
- the ring-shaped insert element 19 is penetrated by a bore into which a sleeve is inserted.
- a compression spring element is supported on the one hand on a ring 21 fastened to the sleeve and, on the other hand, is guided in a spike-shaped extension 22 which is formed on the valve needle 24 of the second control valve 17.
- the valve needle 24 of the second control valve 17 is provided with a plate-shaped element, a valve plate 23, which can be moved up and down in the vertical direction by the electromagnet, the coil of which is received in the recess 20 of the insert element 19.
- the valve seat 26 is formed, which opens or closes the annular space 25 surrounding the valve needle 24.
- the control chamber 30 has an inlet (not shown) and a ring outlet 28, in which a throttle element 29 can be embedded.
- the annular space outlet 28 opens into the annular space 25, which encloses the lower region of the valve needle 24 of the second control valve 17.
- the outlet 27 branches off from the annular space 25, via which the control volume emerging from the control space 30 drains into a reservoir. 2 shows a control module according to FIG. 1, in which a separate receiving element for a solenoid coil is let into the valve body on one of the control valves.
- FIG. 2 A comparison of the already described FIGS. 1 and 2 shows that the part lying to the right of the line of symmetry 3 of the valve body 2, ie. H. the second control valve 17 of FIG. 2 is identical to the control valve 17 of FIG. 1. The only difference is that there is no throttle element 29 in the annular space inlet 28 according to the configuration in FIG. 2.
- the electromagnet activating the first control valve 5 is located, ie its solenoid coil is in recesses 9 of an insert element 32 which is largely enclosed by the valve body 2.
- the insert element 32 can be made of high-quality, soft magnetic material.
- the material of the input serving as a magnetic yoke can be Set element 32 provided with slot-shaped recesses extending in the axial direction.
- recesses configured in a slot shape can be formed on the insert element or also in the valve body 2 in the region of the recesses 9 for receiving the magnet coils 4.
- the insert element 32 as shown in FIG. 2 can either be screwed into the valve body 2, pressed into it, clamped into it or welded or soldered to it in order to establish a permanent connection with the valve body 2 of the control module 1.
- a control chamber 30 is formed in a height offset 34 of the control valves 5 and 17, respectively, of an embodiment variant of the control module 1 according to the invention, into which the conically tapering end of an injector piston 31 projects.
- the control chamber 30 in the valve body 2 can be relieved of pressure via the annular chamber inlet 28, the annular chamber 25, the second control valve 17 and the outlet 27 connected to the latter.
- FIG 3 shows the parallel arrangement of two control valves in the valve body with insert elements for receiving the solenoids of electromagnets.
- valve body 2 of the control module 1 shows that the two control valves 5 and 17 accommodated in the valve body 2 of the control module 1 are exactly identical to one another.
- the valve needles 6 and 24 of the first control valve 5 and the second control valve 17 are of the same diameter, so that the control module proposed according to the invention can be manufactured according to the representation from FIG. 3 according to the common parts principle.
- the use of identical parts is particularly simple in terms of production technology and helps to keep manufacturing costs low.
- a pot-shaped needle receiving element 36 is assigned at the lower end, which is supported at the bottom by means of a valve body 2 - not shown further here.
- FIG. 3 shows that the solenoids of the electromagnets which actuate or activate the control valves 5 and 17 are enclosed in recesses 9 by insert elements 32.
- the solenoids are accommodated in separate internals in the valve body 2.
- the insert elements 32 can be embedded next to one another in the valve body 2. Both insert elements 32 can NEN identical components, both insert elements 32 are preferably made of a high quality, soft magnetic material serving as a magnetic yoke.
- the insert elements 32 in whose recesses 9 the magnet coils of the electromagnets are received, can be screwed to the valve body 2, pressed into the valve body or clamped to the latter.
- a positive connection between valve body 2 and insert element 32 for example by welding and soldering, is also conceivable.
- the configuration of the annular spaces 14 and 25, the leakage oil spaces 10, the corresponding sealing seats 13 and 26 as well as the arrangement of the injector piston 31, control space 30 in the valve body, as well as the annular space inlet 28 and the annular space outlet 27 are identical to those already shown in FIGS 2 outlined configurations.
- FIG. 4 shows the parallel arrangement of two control valves, the actuating solenoid coils of which are both accommodated in recesses in a valve body.
- a particularly low-profile configuration of a control module 1 for fluid control for example in the case of injection systems which inject fuel under high pressure, can be implemented, in which the recesses 9 receiving the solenoid coils are formed directly in the valve body 2.
- the material of the valve body 2 can thus advantageously be used as a magnetic conductor.
- the insert elements 32 made of high-quality, soft magnetic material, which increase the overall height of the valve body can be omitted.
- the annular magnetic armatures 7 received on the valve needles 6 and 24, respectively, direct the axial stroke movement, which is generated when the magnet coils, which are accommodated in the recesses 9 of the valve body 2, are peeled, into vertical stroke movements of the valve needles 6 and 24, respectively.
- FIG. 4 shows a particularly compact embodiment of a control module 1, in which the recesses 9 for the solenoid, the annular space around the valve needles 6 and 24 approximately 14 and 25, the adjoining sealing seat 12 and 26 and the attached subsequent leak oil spaces 10 are arranged particularly close to one another.
- the injector piston is formed coaxially with the axis of symmetry 3 of the valve body 2.
- FIG. 5 shows a variant of a control module with control valves, in which spring elements the control valve bodies are designed to enclose them in their upper region.
- the spring elements 16 are each in the upper region of the valve body 2.
- the spring elements 16 are on the one hand penetrated by the valve needles 6 and 24 and lie against the insides of bores in the insert elements 32 to avoid kinks.
- the insert elements 32 have annularly extending recesses 9 which receive the solenoids of the electromagnets which actuate the control valves 5 and 17, respectively.
- the insert elements 32 can also be produced from high-quality, soft magnetic material; Furthermore, the insert elements 32 can be permanently connected to the valve body 2 of the control module 1 in accordance with the methods of screwing, welding, soldering or pressing or jamming already mentioned. In the upper area of the valve needle 6 or 24, this is enclosed by an annular magnet armature 7, the area of the valve needle 6 or 24 receiving the magnet armature 7 forming the stop surface for the compression spring penetrating the bore in the insert element 32. On the other hand, the compression spring 16, enclosed by the insert element 32, is supported on a ring which in turn lies flat against the valve body 2.
- valve body 2 can be optimized in such a way that the material surrounding the solenoids of the electromagnets can be selected in an optimal manner regardless of the material of the valve body 2 with regard to its magnetic properties.
- FIG 3, 4 and 5 show variants of a control module 1 in which the two control valves 5 and 17 contained therein are arranged symmetrically to one another and have the same overall height. Furthermore, the two control valves 5 and 17, i. H. whose valve needles 6 or 24 have the same manufacturing diameter, so that identical parts can be used.
- FIG. 1 and 2 show that within a valve body 2 of a control module 1 on a first control valve 5, the coil of an electromagnet can be accommodated in the recesses 8 in the valve body 2, while the electromagnet of the second control valve 17 of the control module 1, which is also accommodated in the valve body 2, can be enclosed in a bore 18 by an insert made of high-quality, soft magnetic material.
- FIG. 2 shows that within a valve body 2 of a control module 1 on a first control valve 5, the coil of an electromagnet can be accommodated in the recesses 8 in the valve body 2, while the electromagnet of the second control valve 17 of the control module 1, which is also accommodated in the valve body 2, can be enclosed in a bore 18 by an insert made of high-quality, soft magnetic material.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Electromagnetism (AREA)
- Magnetically Actuated Valves (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10050238A DE10050238A1 (de) | 2000-10-11 | 2000-10-11 | Magnetventilbetätigtes Steuermodul zur Fluidkontrolle bei Einspritzsystemen |
DE10050238 | 2000-10-11 | ||
PCT/DE2001/003737 WO2002031342A1 (de) | 2000-10-11 | 2001-09-28 | Magnetventilbetätigtes steuermodul zur fluidkontrolle bei einspritzsystemen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1327065A1 true EP1327065A1 (de) | 2003-07-16 |
EP1327065B1 EP1327065B1 (de) | 2007-06-06 |
Family
ID=7659332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01978189A Expired - Lifetime EP1327065B1 (de) | 2000-10-11 | 2001-09-28 | Magnetventilbetätigtes steuermodul zur fluidkontrolle bei einspritzsystemen |
Country Status (5)
Country | Link |
---|---|
US (1) | US7063077B2 (de) |
EP (1) | EP1327065B1 (de) |
JP (1) | JP2004511698A (de) |
DE (2) | DE10050238A1 (de) |
WO (1) | WO2002031342A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6702207B2 (en) * | 2002-07-16 | 2004-03-09 | Robert Bosch Gmbh | Fuel injector control module with unidirectional dampening |
US6565020B1 (en) | 2002-07-16 | 2003-05-20 | Detroit Diesel Technology | Electromagnetic actuator and stator design in a fuel injector assembly |
DE10304742A1 (de) * | 2003-02-06 | 2004-08-19 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine |
US6776139B1 (en) | 2003-02-25 | 2004-08-17 | Robert Bosch Gmbh | Fuel injector assembly having multiple control valves with a single actuator |
DE102004028523A1 (de) * | 2004-06-11 | 2005-12-29 | Robert Bosch Gmbh | Kraftstoffinjektor mit Spannhülse als Anschlag für Ventilnadel |
US20060202053A1 (en) * | 2005-03-09 | 2006-09-14 | Gibson Dennis H | Control valve assembly and fuel injector using same |
US20100140519A1 (en) * | 2008-12-04 | 2010-06-10 | General Electric Company | Electromagnetic actuators |
US8145429B2 (en) | 2009-01-09 | 2012-03-27 | Baker Hughes Incorporated | System and method for sampling and analyzing downhole formation fluids |
DE102012023027B3 (de) * | 2012-11-26 | 2014-03-27 | L'orange Gmbh | Kraftstoffinjektor |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3851635A (en) * | 1969-05-14 | 1974-12-03 | F Murtin | Electronically controlled fuel-supply system for compression-ignition engine |
US3817488A (en) * | 1971-10-04 | 1974-06-18 | Northeast Fluidics Inc | Electro-pneumatic device |
DD103691A1 (de) * | 1973-04-06 | 1974-02-05 | ||
GB2045177B (en) * | 1979-03-16 | 1982-10-20 | Lucas Industries Ltd | High pressure hydraulic systems |
JPS57116139A (en) * | 1981-01-09 | 1982-07-20 | Hitachi Ltd | Emergency operating device for electrically controlled injection pump |
US5088467A (en) * | 1984-03-05 | 1992-02-18 | Coltec Industries Inc | Electromagnetic injection valve |
US4583509A (en) * | 1985-01-07 | 1986-04-22 | Ford Motor Company | Diesel fuel injection system |
CH672358A5 (de) * | 1986-10-21 | 1989-11-15 | Jossi Hans Praezisionsmechanik | |
DE3722151A1 (de) * | 1987-07-04 | 1989-01-12 | Bosch Gmbh Robert | Kraftstoffeinspritzpumpe |
US4856713A (en) * | 1988-08-04 | 1989-08-15 | Energy Conservation Innovations, Inc. | Dual-fuel injector |
DE4142998C1 (de) * | 1991-12-24 | 1993-07-22 | Robert Bosch Gmbh, 7000 Stuttgart, De | |
US5339777A (en) * | 1993-08-16 | 1994-08-23 | Caterpillar Inc. | Electrohydraulic device for actuating a control element |
US5494219A (en) * | 1994-06-02 | 1996-02-27 | Caterpillar Inc. | Fuel injection control valve with dual solenoids |
JPH09209867A (ja) * | 1996-02-07 | 1997-08-12 | Mitsubishi Motors Corp | 燃料噴射装置 |
DE19629107C2 (de) * | 1996-07-19 | 1998-08-06 | Mtu Friedrichshafen Gmbh | Vorrichtung zum Einspritzen von Kraftstoff und einem Zusatzfluid in den Brennraum eines Dieselmotors |
US5893516A (en) * | 1996-08-06 | 1999-04-13 | Lucas Industries Plc | Injector |
JP3508537B2 (ja) * | 1998-03-12 | 2004-03-22 | トヨタ自動車株式会社 | 内燃機関の燃料噴射装置 |
US6113014A (en) * | 1998-07-13 | 2000-09-05 | Caterpillar Inc. | Dual solenoids on a single circuit and fuel injector using same |
GB9820033D0 (en) * | 1998-09-16 | 1998-11-04 | Lucas Ind Plc | Fuel injector |
DE19910970A1 (de) * | 1999-03-12 | 2000-09-28 | Bosch Gmbh Robert | Kraftstoffeinspritzeinrichtung |
-
2000
- 2000-10-11 DE DE10050238A patent/DE10050238A1/de not_active Ceased
-
2001
- 2001-09-28 JP JP2002534689A patent/JP2004511698A/ja active Pending
- 2001-09-28 US US10/149,195 patent/US7063077B2/en not_active Expired - Lifetime
- 2001-09-28 DE DE50112607T patent/DE50112607D1/de not_active Expired - Lifetime
- 2001-09-28 WO PCT/DE2001/003737 patent/WO2002031342A1/de active IP Right Grant
- 2001-09-28 EP EP01978189A patent/EP1327065B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0231342A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2002031342A1 (de) | 2002-04-18 |
DE50112607D1 (de) | 2007-07-19 |
US7063077B2 (en) | 2006-06-20 |
JP2004511698A (ja) | 2004-04-15 |
US20030102391A1 (en) | 2003-06-05 |
EP1327065B1 (de) | 2007-06-06 |
DE10050238A1 (de) | 2002-04-25 |
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