EP1179119A1 - Elektromechanischer stellantrieb - Google Patents
Elektromechanischer stellantriebInfo
- Publication number
- EP1179119A1 EP1179119A1 EP00934868A EP00934868A EP1179119A1 EP 1179119 A1 EP1179119 A1 EP 1179119A1 EP 00934868 A EP00934868 A EP 00934868A EP 00934868 A EP00934868 A EP 00934868A EP 1179119 A1 EP1179119 A1 EP 1179119A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- actuator
- electromagnet
- contact element
- plug
- 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
- 238000000034 method Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 description 8
- 239000002826 coolant Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49009—Dynamoelectric machine
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/4902—Electromagnet, transformer or inductor
Definitions
- the invention relates to an electromechanical actuator, in particular for a gas exchange valve of an internal combustion engine, according to the preamble of patent claim 1.
- a known electromechanical actuator (DE 196 47 305 Cl) has two electromagnets, each with a coil, and an armature, which has a shaft and which is mechanically coupled to a spring.
- the armature is movable between a first contact surface on the first electromagnet and a further contact surface on the second electromagnet.
- the actuator is arranged in a cylinder head of an internal combustion engine.
- the shaft of the armature is non-positively coupled to a shaft of a gas exchange valve in the de-energized state of the coils of the electromagnets.
- the shaft of the gas exchange valve is coupled to a second spring which acts in the opposite direction to the first spring, as a result of which the non-positive connection between the shaft of the gas exchange valve and the shaft of the armature is established.
- the stem of the anchor plate When installing the actuator in the cylinder head, the stem of the anchor plate must be positioned exactly in line with the stem of the gas exchange valve. Furthermore, the first and the second spring must be compressed during assembly in order to bring the actuator into the assembly position. If the necessary force is not applied exactly, bolts, which are usually used to fix the actuator in the cylinder head, and an associated thread turn are subject to high tensile stresses and can be damaged in the process.
- the object of the invention is to develop the known actuator so that it can be easily and reliably mounted on a carrier.
- Another object of the invention is to specify a method that ensures reliable and easy installation of the actuator on the carrier.
- FIG. 1 shows an arrangement of the actuator according to the invention in an internal combustion engine
- FIG. 2 shows an enlarged section of the actuator according to FIG. 2
- FIG. 3 shows a further enlarged section of the actuator according to FIG. 1.
- An internal combustion engine (FIG. 1) comprises an actuator 1, which acts on a gas exchange valve 2 and which is arranged in a cylinder head 31 of the internal combustion engine.
- the gas exchange valve 2 is designed either as an outlet valve or as an inlet valve.
- the gas exchange valve 2 has a valve stem 21 and a plate 22.
- the actuator 1 has a housing 11 in which a first and a second electromagnet are arranged.
- the first electromagnet has a first core 12 which is provided with a first coil 13.
- the second electromagnet has a second core 14 which is provided with a second coil 15.
- An armature is provided, the armature plate being movably arranged in the housing 11 between a first contact surface 15a of the first electromagnet and a second contact surface 15b of the second electromagnet.
- the anchor plate 16 is thus movable between one Close position s ma ⁇ s and an open position s max0 .
- the armature further comprises a shaft 17 which is guided through recesses in the first and second core 12, 14 and which can be mechanically coupled to the valve shaft 21 of the gas exchange valve 2.
- a first return means 18 a and a second return means 18 b which are preferably designed as springs, bias the anchor plate 16 into the predetermined rest position s 0 .
- the resetting means 18a, 18b are arranged on one side on the housing 11 of the actuator toward the gas exchange valve 2 in a recess in the cylinder head 31.
- the restoring means 18a, 18b are referred to below as springs.
- the first spring 18a is supported on the one hand on a spring plate, which in turn rests on the housing 11, and on the other hand on a further spring plate, which is positively connected to the armature shaft 17.
- the second spring 18b is supported on the one hand on a spring plate, which is supported on the cylinder head 31, and on the other hand on a further spring plate, which is positively connected to the valve stem 21 of the gas exchange valve.
- the armature shaft 17 and the valve shaft 21 are aligned, that is to say positioned coaxially to one another.
- the springs are preferably designed such that the second spring 18b is almost relaxed when the anchor plate 16 is in contact with the first contact surface 15a, and the first spring 18a is largely relaxed when the anchor plate is in contact with the second contact surface 15b.
- the distance between the first and second contact surfaces that is, between the closed position s ma ⁇ s and the open position s max0 , is, for example, eight millimeters.
- the actuator is also assigned a plug 51, in which contact elements 53 are arranged, which are electrically conductively connected to the coils 13, 15. Furthermore, a connector receptacle 52 is arranged on the cylinder head 31. The connector 51 and the connector receptacle 52 are described in more detail below with reference to FIGS. 2 and 3.
- the actuator 1 is rigidly connected to the cylinder head 31 of the internal combustion engine. For this purpose, it is preferably fixed in a thread of the cylinder head by means of bolts.
- An intake passage 32 and a cylinder 33 with a piston 34 are provided in the internal combustion engine.
- the piston 34 is coupled to a crankshaft 36 via a connecting rod.
- a control device 4 which detects the signals from sensors which are designed, for example, as a position sensor 19 and / or a speed sensor 37 and / or a load detection sensor.
- the control device 4 controls the first and second coils 13, 15 of the actuator depending on the signal from the sensors.
- the plug 51 (FIG. 2) has an opening towards the cylinder head 31 in which the plug receptacle 52 is received.
- the contact elements 53 are designed either as a contact pin or as a leadframe.
- resilient contact elements which can also be designed, for example, as contact pins and which are arranged such that they contact the respective contact elements 53 of the plug 51 in the installed state of the actuator of the internal combustion engine.
- the coolant is preferably designed as an engine oil.
- the plug 51 and the plug receptacle 52 are therefore designed such that, when the plug receptacle 52 is inserted into the plug 51, the area in which the contact elements 53 contact the spring-formed contact elements 55 are sealed off from the coolant.
- appropriate seals are optionally provided on the connector 51 or the connector receptacle 52. This ensures that there can be no short circuits with adjacent contact elements between the contact elements.
- a recess 57 is provided in the plug 51, through which a portion of the contact element 53 designed as a service contact 58 is passed.
- the recess 57 and the service contact 58 are designed in such a way that the service contact 58 can be electrically contacted by means of an assembly contact element 59 at least while the actuator is being mounted on the cylinder head 31.
- the actuator 1 is mounted on the cylinder head 31 from above (see FIG. 1). Therefore, the service contact 58 is arranged so that it is accessible from the side of the plug 51 facing away from the cylinder head.
- the mounting contact element 59 is first contacted with the contact element 53.
- the mounting contact element 59 is connected to an external power supply.
- the first coil 13 is then energized.
- a second contact element is preferably connected to a service contact and is also contacted to an assembly contact element if the actuator is not already connected to a ground connection on site.
- the current through the first coil is predetermined such that the magnetic force generated in the first electromagnet is sufficient to bring the armature plate into contact with the first contact surface and to hold it there.
- the actuator is then positioned in the cylinder head so that the stem 17 and the valve stem 21 are aligned and fixed by means of bolts which are screwed into a thread formed in the cylinder head 31.
- the contacting element 59 remains in constant contact with the service contact, so that the armature plate 16 is held in contact with the first contact surface 15a by the force generated by the first electromagnet. This ensures with simple means that the actuator can be positioned exactly and the bolts in the thread in Cylinder head 31 can be screwed in without the bolts being subjected to high tensile forces.
- the service contact 58 is preferably guided oil-tight through the recess 57 of the plug 51. This ensures that oil is prevented from running through the engine during operation
- the actuator is characterized in that it can be easily and precisely installed in the cylinder head 31.
- the already existing electromagnet in the actuator is used to apply the necessary force to bring the anchor plate into contact with the first contact surface 15a and thus the free end of the shaft 17 on the side on which the
- the spring 18a is arranged to be withdrawn to such an extent that the actuator can be brought into its mounting position on the cylinder head 31 without it being necessary to compress the spring 18b.
- the springs 18a, 18b are preferably conical. They preferably taper towards the spring plates 18c, 18d, which are each positively connected to the armature shaft 17 or to the shaft 21 of the gas exchange valve.
- the conical design of the springs 18a, 18b has the advantage that, in comparison to cylindrical springs, i.e. with a uniform winding diameter, have a lower mass.
- the spring plates 18c, 18d can also be made smaller by using the conical springs.
- the conical design of the spring is an independent invention, regardless of the presence of the mounting contact element.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19922425A DE19922425C1 (de) | 1999-05-14 | 1999-05-14 | Elektromechanischer Stellantrieb und seine Montage z.B. als Gaswechselventil in den Zylinderkopf einer Brennkraftmaschine |
| DE19922425 | 1999-05-14 | ||
| PCT/DE2000/001033 WO2000070194A1 (de) | 1999-05-14 | 2000-04-04 | Elektromechanischer stellantrieb |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1179119A1 true EP1179119A1 (de) | 2002-02-13 |
| EP1179119B1 EP1179119B1 (de) | 2003-09-17 |
Family
ID=7908180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00934868A Expired - Lifetime EP1179119B1 (de) | 1999-05-14 | 2000-04-04 | Elektromechanischer stellantrieb |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6803686B2 (de) |
| EP (1) | EP1179119B1 (de) |
| JP (1) | JP2002544757A (de) |
| DE (2) | DE19922425C1 (de) |
| WO (1) | WO2000070194A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10063471A1 (de) * | 2000-12-19 | 2002-06-20 | Claas Industrietechnik Gmbh | Kontaktierungsvorrichtung und eine Magnetspule |
| JP3780886B2 (ja) * | 2001-09-07 | 2006-05-31 | トヨタ自動車株式会社 | 内燃機関のバルブ駆動装置 |
| US7059879B2 (en) * | 2004-05-20 | 2006-06-13 | Hubbell Incorporated | Electrical connector having a piston-contact element |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2481680A (en) * | 1946-06-07 | 1949-09-13 | Byron E Mills | Solenoid operated dice agitating game device |
| US3184622A (en) * | 1960-08-01 | 1965-05-18 | Edwards Company Inc | Bell striker assembly |
| US3130333A (en) * | 1961-05-17 | 1964-04-21 | Walbro Corp | Electric pump motor |
| US3670188A (en) * | 1971-07-16 | 1972-06-13 | Anton Voros Jr | Electromagnetic reciprocating motor |
| DE2400509A1 (de) * | 1974-01-07 | 1975-07-17 | Daut & Rietz Kg | Gabelfeder mit loetansatz |
| JPH0620009B2 (ja) | 1984-05-24 | 1994-03-16 | キヤノン株式会社 | コイルボビン |
| US4777915A (en) * | 1986-12-22 | 1988-10-18 | General Motors Corporation | Variable lift electromagnetic valve actuator system |
| JPH04131734A (ja) * | 1990-09-25 | 1992-05-06 | Fuji Electric Co Ltd | 変圧器の自動試験接続装置 |
| DE4225329A1 (de) * | 1992-07-31 | 1993-02-18 | Dreyer Dietmar | Ventilansteuerungseinrichtung fuer den einsatz in verbrennungsmotoren |
| DE19611547A1 (de) * | 1996-03-23 | 1997-09-25 | Bayerische Motoren Werke Ag | Elektromagnetische Betätigungsvorrichtung für Brennkraftmaschinen-Hubventile |
| DE19612397A1 (de) * | 1996-03-28 | 1997-10-02 | Bayerische Motoren Werke Ag | Stellvorrichtung zur relativen Winkelverstellung einer angetriebenen Welle, insbesondere Nockenwelle einer Brennkraftmaschine |
| GB9606803D0 (en) * | 1996-03-30 | 1996-06-05 | Lucas Ind Plc | Injection nozzle |
| DE19647305C1 (de) * | 1996-11-15 | 1998-02-05 | Daimler Benz Ag | Vorrichtung zur elektromagnetischen Betätigung eines Gaswechselventils |
| US6094118A (en) * | 1997-12-09 | 2000-07-25 | Siemens Automotive Corporation | Electromagnetic actuator with stamped steel housing |
| US6044813A (en) * | 1997-12-09 | 2000-04-04 | Siemens Automotive Corporation | Electromagnetic actuator with detached lower collar to align with cylinder head bore |
| DE19756096A1 (de) * | 1997-12-17 | 1999-06-24 | Daimler Chrysler Ag | Aktor zur elektromagnetischen Ventilsteuerung |
| DE19756095C2 (de) * | 1997-12-17 | 2001-11-22 | Telefunken Microelectron | Vorrichtung zum Betrieb von Aktoren zur elektromagnetischen Ventilsteuerung bei Brennkraftmaschinen |
-
1999
- 1999-05-14 DE DE19922425A patent/DE19922425C1/de not_active Expired - Fee Related
-
2000
- 2000-04-04 WO PCT/DE2000/001033 patent/WO2000070194A1/de not_active Ceased
- 2000-04-04 EP EP00934868A patent/EP1179119B1/de not_active Expired - Lifetime
- 2000-04-04 DE DE50003733T patent/DE50003733D1/de not_active Expired - Fee Related
- 2000-04-04 JP JP2000618589A patent/JP2002544757A/ja not_active Withdrawn
-
2001
- 2001-11-14 US US09/992,996 patent/US6803686B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0070194A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19922425C1 (de) | 2000-10-19 |
| DE50003733D1 (de) | 2003-10-23 |
| WO2000070194A1 (de) | 2000-11-23 |
| US20020060503A1 (en) | 2002-05-23 |
| US6803686B2 (en) | 2004-10-12 |
| EP1179119B1 (de) | 2003-09-17 |
| JP2002544757A (ja) | 2002-12-24 |
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