EP2510527A1 - Procede de dimensionnement d'un circuit magnetique d'un actuateur electromagnetique de commande d'un obturateur pour injecteur de moteur thermique et dispositif electromagnetique - Google Patents
Procede de dimensionnement d'un circuit magnetique d'un actuateur electromagnetique de commande d'un obturateur pour injecteur de moteur thermique et dispositif electromagnetiqueInfo
- Publication number
- EP2510527A1 EP2510527A1 EP10801647A EP10801647A EP2510527A1 EP 2510527 A1 EP2510527 A1 EP 2510527A1 EP 10801647 A EP10801647 A EP 10801647A EP 10801647 A EP10801647 A EP 10801647A EP 2510527 A1 EP2510527 A1 EP 2510527A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnetic
- magnetic circuit
- core
- polarization
- movable shutter
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/081—Magnetic constructions
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/16—Rectilinearly-movable armatures
- H01F7/1607—Armatures entering the winding
Definitions
- the present invention relates to an electromagnetic device for controlling a movable shutter forming part of a fuel supply circuit of an injector for a thermal engine of a motor vehicle.
- an electromagnetic control device for an injector comprises a tubular body internally defining a housing for an electromagnetic actuator of a movable shutter such as a valve.
- This valve is part of a fuel supply circuit for an injector of a heat engine.
- the electromagnetic actuator comprises a coil and a magnetic circuit comprising a stator and the movable shutter.
- the stator is composed of several parts such as, for example, a core around which the winding is mounted and a loopback sleeve mounted to support inside the tubular body.
- the stator is held in abutment on the tubular body so as to define between the stator and the movable shutter, an air gap of precise dimensions to ensure proper control of the axial displacement of the movable shutter.
- the circulation of a current in the winding generates the appearance of a magnetic field which creates the magnetic polarization (or magnetization) giving rise to the magnetic induction.
- the magnetic flux thus passes successively from the core to the gap delimited between the core and the movable shutter, in the movable shutter, in the air gap delimited between the movable shutter and the jacket and then loop back into the core via the loopback shirt.
- the magnetic induction contributes to the appearance of forces in the gap between the stator and the movable shutter which thus controlled in axial displacement, ensures the opening or closing of the supply circuit of the injector.
- the magnetic actuator is dimensioned so as to ensure the application of a force necessary for the control in displacement of the movable shutter.
- such electromagnetic control device comprises congestion constraints related to its implementation in the engine, functional constraints related to the seal to be provided in particular between the electrical circuit and the fuel circulation circuit and the feasibility constraints related to the machining or forming the various component parts.
- the present invention therefore aims to overcome the drawbacks of the prior art by proposing a method for optimizing the sizing of an electromagnetic actuator for controlling a shutter forming part of a fuel supply circuit, while allowing to respect constraints including congestion, functional and feasibility.
- the method relates to the sizing of a magnetic circuit of an electromagnetic actuator for controlling a movable shutter forming part of a fuel supply circuit of an injector for a heat engine, the magnetic circuit being formed by various parts in particular, the movable shutter and a core surrounded by a coil in which circulates an excitation current for obtaining the creation of a magnetic induction in the magnetic circuit.
- the method consists in choosing, for at least two constituent parts of the magnetic circuit, magnetic flow passage sections of different values and different materials having different different saturation values for the magnetic polarization so that the constituent elements of the magnetic circuit reach their magnetic polarization saturation value, for substantially the same value of the current flowing in the coil.
- the sizing method consists in producing at least a part of the core with a material having a saturation value for the magnetic polarization, greater than the saturation value for the magnetic polarization of the other materials of at least a part of the constituent parts of the magnetic circuit.
- Another object of the invention is to provide an electromagnetic device for controlling a movable shutter forming part of a fuel supply circuit of an injector for a heat engine.
- This electromagnetic device for controlling a movable shutter forming part of a fuel supply circuit of an injector for a heat engine the device comprises, in a tubular body delimiting a housing, an electromagnetic actuator of the movable shutter comprising a magnetic circuit formed by various parts including the movable shutter and a core surrounded by a coil in which circulates an excitation current for the creation of a magnetic induction in the magnetic circuit, characterized in that at least two parts of the magnetic circuit have, on the one hand magnetic flux passage sections of different values and, on the other hand, materials having different saturation values for the magnetic polarization so that the constituent elements of the magnetic circuit reach their saturation value of magnetic polarization, for substantially the same value of the current t circulating in the winding.
- an inductive sensor according to the invention may furthermore have at least one of the following additional characteristics:
- At least a part of the core is made of a material having a saturation value for the magnetic polarization, greater than the saturation value for the magnetic polarization of the other materials forming at least in part the other constituent parts of the magnetic circuit,
- the magnetic circuit also comprises, in association with the core, a flux looping jacket with the movable shutter,
- the looping sleeve is mounted in support inside the tubular body
- At least a part of the loopback jacket is made of a material having a saturation value for the magnetic polarization, on the one hand less than that of the constituent material of the core and, on the other hand, greater than that of the material constituting the tubular body,
- At least a part of the core is made of Cobalt Iron alloy while at least a part of the movable shutter is made of iron-silicon alloy,
- At least a part of the looping jacket is made of iron-silicon alloy while at least part of the core is made of iron-cobalt alloy,
- the tubular body is made of mild steel.
- Figure 1 is a perspective view generally showing an injector for a heat engine.
- Figure 2 is a half-section in elevation showing the realization of an electromagnetic control device for a movable shutter according to the invention.
- FIG. 3 represents the magnetic polarization curves J as a function of the magnetic field H, for various materials Mi, M 2 and M 3 exhibiting different magnetic polarization saturation values respectively JsatMi, JsatM 2 , JsatM 3 .
- FIG. 1 illustrates an electromagnetic injector 1 for an internal combustion engine.
- This injector 1 is for example of the common rail type.
- Such an electromagnetic injector 1 comprises a tubular body 2 forming its outer envelope.
- the electromagnetic injector 1 is provided at one of its ends with an injection nozzle 4 for the fuel.
- the end of the tubular body 2 opposite that provided with the injection nozzle 4 is used to assemble a mounting system 6 of an electromagnetic control device 7 for a movable shutter 8.
- the electromagnetic device 7 is mounted inside a bore or a housing 9 delimited by the tubular body 2.
- the electromagnetic control device 7 comprises an electromagnetic actuator 11 for the movable shutter 8 such that a valve part of a circuit, not shown, fuel supply of the injection nozzle 4.
- the movable shutter 8 and the fuel supply circuit are not shown more precisely because they are not part of specifically of the invention and are well known to those skilled in the art.
- the electromagnetic actuator 11 comprises a magnetic circuit 12 formed of several parts and including a stator 13 and the movable shutter 8.
- the magnetic circuit 12 thus comprises at least one gap E between the stator 13 and the movable shutter 8.
- the stator 13 comprises a central core 14 surrounded by a coil 16 in which circulates an excitation current.
- the coil 16 which consists of several turns is not described more precisely because it does not form part of the invention and is well known to those skilled in the art.
- the stator 13 of the magnetic circuit 12 also includes a jacket 18 of loopback of the flow, mounted inside the housing 9. This jacket 18 surrounds the winding 16 to ensure the looping of the magnetic flux between the core 14 and the movable shutter 8.
- the liner 18 is mounted in abutment on a stop 19 inside the tubular body 2.
- the magnetic flux passes from the core 14 to the air gap E delimited between the core 14 and the movable shutter 8, in the movable shutter 8, in the gap Ei delimited between the movable shutter. 8 and the liner 18 and then loops back into the core 14 via the loopback liner 18.
- the object of the invention is to provide a method of sizing the magnetic circuit 12 to optimize its implementation to ensure the reliable control of the movable shutter 8 while taking into account the constraints of implementation such as space, functioning and feasibility.
- the method according to the invention aims to choose for at least two constituent parts of the magnetic circuit 12, different materials having different saturation values for the magnetic polarization J so that the constituent elements of the magnetic circuit 12 reach the saturation value of the magnetic polarization for substantially the same value of the current flowing in the coil 16.
- the appearance of a saturated zone in a magnetic circuit degrades the overall performance of the electromagnetic actuator 11.
- the sizing method according to the invention therefore aims to combine for the parts of the magnetic circuit 12, their passage sections of the magnetic flux and their saturation values of the magnetic polarization so that the constituent parts of the magnetic circuit reach their saturation value. of magnetic polarization for substantially the same current value flowing in the winding 16. Under these conditions, the realization of the magnetic circuit 12 with materials whose saturation polarization values are different while the passage section of the magnetic flux in the magnetic circuit 12 is variable avoids saturation in the magnetic circuit zones 12 having a small passage section.
- the object of the invention is therefore to dimension the parts of the magnetic circuit 12 in terms of passage sections and saturation polarization values, so as not to obtain saturated areas for the excitation current in the winding 16 .
- Fig. 3 illustrates different curves of the magnetic polarization J as a function of the magnetic field H for different materials namely Mi, M2, M 3 .
- Each magnetic polarization curve 3 has a linearity range followed by a saturation range.
- the materials M x , M2, M3 respectively exhibit different saturation values for the magnetic polarization namely JsatMi, JsatM 2 and JsatM 3 with JsatMi greater than JsatM 2 which is greater than JsatM 3 in the example illustrated.
- the materials Mi, M 2 , M 3 correspond to respectively high-end, mid-range and low-end materials.
- a high-end material Mi may have a saturation polarization 1.2 to 1.5 times larger than a standard material M2.
- the high-end material Mi may be an alloy of Cobalt Iron (Jsat of 2.2 to 2.4 T).
- the standard material M 2 can be an iron silicon alloy (Jsat of 1.75 T at 2 T).
- the magnetic circuit 12 comprises at least two parts or two parts of parts having, on the one hand, magnetic flux passage sections of different values and, on the other hand, materials having different saturation values. for magnetic polarization 3.
- the method aims at producing at least part of the core 14 with a material having a value of saturation for the magnetic polarization J greater than the saturation value for the magnetic polarization of the other materials constituting the magnetic circuit and in particular the other parts of the magnetic circuit.
- the core 14 is made of iron alloy
- the movable shutter 8 is made of Iron Silicon alloy (M 2 ).
- the core 14 is made of Cobalt Iron alloy (Mi) while the looping liner 18 is made of iron-silicon alloy (M 2 ).
- the realization of the liner 18 Iron Silicon alloy gives it a mechanical strength to resist the compressive force to which the electromagnetic actuator is subjected for sealing issues.
- the movable shutter 8 may be made of Cobalt Iron alloy (Mj) or Iron Silicon alloy (M2).
- tubular body 2 may be provided to produce the tubular body 2 based on mild steel (M3) so that the sleeve 18 is less magnetically stressed.
- M3 mild steel
- the entire core 14 is made of a high-end material Mi. It should be noted that it can be expected to achieve only part of the core 14 with a high-end material Mi. in the exemplary embodiment illustrated in FIG. 4, the part of the core 14 placed opposite the movable shutter 8 and surrounded by the winding 16 is made of a high-end material Mi while a portion 14i of the connection core with the jacket 18 is made of a standard material M 2 .
- the liner 18 is made completely of a single material such as a standard material M2.
- Fig. 5 illustrates an alternative embodiment in which only a portion of the liner 18 is made of a standard material M 2 while another part I8 1 is made of a high-end material Mi.
- the part I8 1 of the jacket 18 made by the high-end material Mi is a part located in relation to the movable shutter 8.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Electromagnets (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0958892A FR2953978B1 (fr) | 2009-12-11 | 2009-12-11 | Procede de dimensionnement d'un circuit magnetique d'un actuateur electromagnetique de commande d'un obturateur pour injecteur de moteur thermique et dispositif electromagnetique |
| PCT/FR2010/052662 WO2011070303A1 (fr) | 2009-12-11 | 2010-12-09 | Procede de dimensionnement d'un circuit magnetique d'un actuateur electromagnetique de commande d'un obturateur pour injecteur de moteur thermique et dispositif electromagnetique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2510527A1 true EP2510527A1 (fr) | 2012-10-17 |
| EP2510527B1 EP2510527B1 (fr) | 2014-02-12 |
Family
ID=42262368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10801647.8A Active EP2510527B1 (fr) | 2009-12-11 | 2010-12-09 | Procede de dimensionnement d'un circuit magnetique d'un actuateur electromagnetique de commande d'un obturateur pour injecteur de moteur thermique et dispositif electromagnetique |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2510527B1 (fr) |
| KR (1) | KR101747988B1 (fr) |
| CN (1) | CN102754170A (fr) |
| FR (1) | FR2953978B1 (fr) |
| WO (1) | WO2011070303A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2990998B1 (fr) * | 2012-05-23 | 2016-02-26 | Continental Automotive France | Procede de pilotage d'au moins un actionneur piezoelectrique d'injecteur de carburant d'un moteur a combustion interne |
| US9502167B1 (en) * | 2015-11-18 | 2016-11-22 | Hamilton Sundstrand Corporation | High temperature electromagnetic actuator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060238284A1 (en) * | 2005-03-30 | 2006-10-26 | Dimig Steven J | Residual magnetic devices and methods |
| EP2194632B1 (fr) | 2007-09-26 | 2019-02-27 | Mitsubishi Electric Corporation | Actionneur à électroaimant |
-
2009
- 2009-12-11 FR FR0958892A patent/FR2953978B1/fr not_active Expired - Fee Related
-
2010
- 2010-12-09 KR KR1020127017696A patent/KR101747988B1/ko active Active
- 2010-12-09 WO PCT/FR2010/052662 patent/WO2011070303A1/fr not_active Ceased
- 2010-12-09 EP EP10801647.8A patent/EP2510527B1/fr active Active
- 2010-12-09 CN CN201080056054XA patent/CN102754170A/zh active Pending
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2011070303A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101747988B1 (ko) | 2017-06-15 |
| WO2011070303A1 (fr) | 2011-06-16 |
| KR20120123045A (ko) | 2012-11-07 |
| FR2953978A1 (fr) | 2011-06-17 |
| CN102754170A (zh) | 2012-10-24 |
| EP2510527B1 (fr) | 2014-02-12 |
| FR2953978B1 (fr) | 2013-02-08 |
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