EP1059424B1 - Method for cooling electromagnetic valve actuators in an internal combustion engine - Google Patents
Method for cooling electromagnetic valve actuators in an internal combustion engine Download PDFInfo
- Publication number
- EP1059424B1 EP1059424B1 EP00111426A EP00111426A EP1059424B1 EP 1059424 B1 EP1059424 B1 EP 1059424B1 EP 00111426 A EP00111426 A EP 00111426A EP 00111426 A EP00111426 A EP 00111426A EP 1059424 B1 EP1059424 B1 EP 1059424B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- actuator
- actuators
- internal combustion
- combustion engine
- cooling
- 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.)
- Expired - Lifetime
Links
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
Definitions
- the invention relates to a method for cooling actuators for internal combustion engine lift valves, whereby by each actuator part of an in the internal combustion engine circulated fluid flow, in particular lubricating oil flow, is passed through.
- the technical environment is based on the DE 197 14 496 A1.
- the internal combustion engine is still cold, i.e. the engine has its after a cold start Operating temperature has not yet been reached, so they still need it cold actuators no cooling at all, so at least theoretically any cooling fluid flow through the actuators can be prevented and therefore there is no power loss caused by the cooling.
- the lubricating oil of the internal combustion engine as a cooling fluid
- always a small amount of lubricating oil for the actuators must be supplied, namely for lubrication thereof. In this case is possibly a complete stop of the supply of lubricating oil to the actuators not possible.
- the method according to the invention does not only include a simple one Query whether cooling of the actuators is necessary or not, but it is generally intended to be the amount of cooling through the actuators guided fluid flow can be set so that ultimately a critical (maximum) component temperature of the actuators is not exceeded becomes.
- This setting is carried out by means of a suitable valve device, which a more or less large amount of cooling fluid through the Actuators can flow, in particular or essentially in Dependence on the current component temperature of the actuators.
- the current component temperature of an actuator can be determined using a suitable sensor are measured, after which in an electronic Control unit a query or a comparison is made whether this current Temperature far below or near the critical maximum actuator component temperature lies. The result of this comparison will be one more or less large amount of cooling fluid through the actuator (s) directed.
- an electrical characteristic of an actuator corresponding to the current component temperature can thus be determined in an electronic control unit assigned to the actuators on the basis of the electrical current flowing through the solenoid coils of the actuator and compared in an electronic control unit with the critical component temperature or a critical electrical characteristic corresponding to this are, whereupon the latter control unit controls the said valve device with regard to the amount of the required cooling fluid flow.
Description
Die Erfindung betrifft ein Verfahren zur Kühlung von Aktuatoren für Brennkraftmaschinen-Hubventile, wobei durch jeden Aktuator ein Teil eines in der Brennkraftmaschine umgewälzten Fluidstromes, insbesondere Schmierölstromes, hindurch geleitet wird. Zum technischen Umfeld wird auf die DE 197 14 496 A1 verwiesen.The invention relates to a method for cooling actuators for internal combustion engine lift valves, whereby by each actuator part of an in the internal combustion engine circulated fluid flow, in particular lubricating oil flow, is passed through. The technical environment is based on the DE 197 14 496 A1.
Eine elektromagnetische Hubventil-Betätigungsvorrichtung für eine Brennkraftmaschine hat wegen der Freiheit hinsichtlich der Ventilsteuerzeiten, d.h. hinsichtlich des jeweiligen Öffnungs- und Schließzeitpunktes der Hubventile immense Vorteile, jedoch müssen zum Betätigen, insbesondere zum Öffnen des Hubventiles relativ hohe Kräfte aufgebracht werden, was eine gewisse Mindestgröße von Magnetspulen und Anker erforderlich macht. Als Folge hiervon ist es äußerst schwierig, die bekannten Aktuatorgehäuse überhaupt in einem heute üblichen Zylinderkopf beispielsweise einer ein Kraftfahrzeug antreibenden Brennkraftmaschine unterzubringen. Dabei entsteht in den Magnetspulen bei der Betätigung der Hubventile insbesondere bei höheren Betätigungsfrequenzen relativ viel Verlustwärme, die auf geeignete Weise abgeführt werden muß. Eine reine Konvektionskühlung des Aktuatorgehäuses in der umgebenden Luft ist hierfür nicht ausreichend, insbesondere auch unter Berücksichtigung der soeben beschriebenen beengten Platzverhältnisse.An electromagnetic lift valve operating device for an internal combustion engine because of the freedom in terms of valve timing, i.e. with regard to the respective opening and closing times of the globe valves immense advantages, however, have to be operated, especially to open of the lift valve relatively high forces are applied, which is a certain Requires minimum size of solenoid coils and armature. As a result of these, it is extremely difficult to even know the known actuator housings in a cylinder head common today, for example, a motor vehicle to accommodate driving internal combustion engine. This creates in the Solenoid coils when operating the globe valves, especially at higher ones Operating frequencies relatively much heat loss, which is appropriate must be dissipated. Pure convection cooling of the actuator housing in the surrounding air is not sufficient for this, especially also taking into account the limited space just described.
Bei der elektromagnetischen Hubventil-Betätigungsvorrichtung nach der o.g. DE 197 14 496 A1 ist daher eine Flüssigkeitskühlung vorgesehen, wobei im Gehäuse des Aktuators ein Kühlkanal vorgesehen ist, innerhalb dessen ein Teil eines innerhalb der Brennkraftmaschine umgewälzten Fluidstromes als Kühlflüssigkeit durch den Aktuator hindurch geführt wird. Dieser Kühl-Fluidstrom kann dabei die Kühlflüssigkeit der (bevorzugt wassergekühlten) Brennkraftmaschine sein oder vom Schmierölstrom der Brennkraftmaschine abgezweigt werden. Dabei sei an dieser Stelle ausdrücklich darauf hingewiesen, daß die vorliegende Erfindung nicht auf Aktuatoren mit im Gehäuse integrierten Kühlkanälen beschränkt ist, vielmehr kann der Kühl-Fluidstrom auch - wie dies in der US 3,882,833 gezeigt ist - direkt durch den Aktuator hindurch geleitet werden.With the electromagnetic globe valve actuation device according to the above DE 197 14 496 A1 therefore provides liquid cooling, in which Housing of the actuator, a cooling channel is provided, within which a Part of a fluid flow circulated within the internal combustion engine as Coolant is passed through the actuator. This cooling fluid flow can the coolant (preferably water-cooled) Be internal combustion engine or from the lubricating oil flow of the internal combustion engine be branched off. At this point it is expressly pointed out that the present invention does not apply to actuators in the housing integrated cooling channels is limited, rather the cooling fluid flow also - as shown in US 3,882,833 - directly through the actuator be passed through.
Offensichtlich ist, daß für die beschriebene Kühlung der an einer Brennkraftmaschine üblicherweise in größerer Stückzahl vorhandenen Aktuatoren ein geringer Teil der von der Brennkraftmaschine erbrachten Leistung zur Verfügung gestellt werden muß, insbesondere wenn als Kühl-Fluid das in der Brennkraftmaschine umgewälzte Schmiermittel verwendet wird. Für letzteres gilt dies insbesondere bei kaltem Schmiermittel und somit noch nicht betriebswarmer Brennkraftmaschine wegen der dann höheren Viskosität des Schmieröles. Im Hinblick auf den Kraftstoffverbrauch der Brennkraftmaschine sollen derartige Verlust-Leistungen so gering als möglich gehalten werden. It is obvious that for the described cooling of an internal combustion engine Actuators usually present in large numbers a small part of the power provided by the internal combustion engine Must be made available, especially if the cooling fluid in circulated lubricant is used in the internal combustion engine. For the latter applies in particular to cold lubricants and thus still not warm internal combustion engine because of the higher viscosity of the lubricating oil. With regard to the fuel consumption of the internal combustion engine Such losses should be kept as low as possible become.
Eine diesbezügliche Maßnahme aufzuzeigen, ist Aufgabe der vorliegenden
Erfindung.
Die Lösung dieser Aufgabe ist dadurch gekennzeichnet, daß die Menge des
durch den/die Aktuator(en) hindurch geleiteten Fluidstromes veränderbar ist
und mittels einer geeigneten Ventileinrichtung derart eingestellt wird, daß
letztlich die kritische Bauteiltemperatur der Aktuatoren nicht überschritten
wird. Eine vorteilhafte Weiterbildung ist Inhalt des Unteranspruches.It is the object of the present invention to demonstrate a measure in this regard.
The solution to this problem is characterized in that the amount of the fluid flow directed through the actuator (s) can be changed and is adjusted by means of a suitable valve device such that the critical component temperature of the actuators is not ultimately exceeded. An advantageous development is the content of the subclaim.
Erfindungsgemäß soll letzlich nur eine solche Menge von kühlendem Fluidstrom durch die Aktuatoren hindurch geleitet werden, wie tatsächlich zur Kühlung derselben benötigt wird. Ist bspw. die Brennkraftmaschine noch kalt, d.h. hat die Brennkraftmaschine anschließend an einen Kaltstart ihre Betriebstemperatur noch nicht erreicht, so benötigen die dann ebenfalls noch kalten Aktuatoren überhaupt keine Kühlung, so daß zumindest theoretisch jeglicher Kühl-Fluidstrom durch die Aktuatoren unterbunden werden kann und somit auch keine durch die Kühlung hervorgerufene Verlustleistung anfällt. Jedoch sei in diesem Zusammenhang darauf hingewiesen, daß bei Verwendung des Schmieröles der Brennkraftmaschine als Kühl-Fluid eventuell stets eine dann allerdings geringe Menge von Schmieröl den Aktuatoren zugeführt werden muß, und zwar zur Schmierung derselben. In diesem Falle ist ggf. eine vollständige Unterbindung der Zufuhr von Schmieröl zu den Aktuatoren nicht möglich.According to the invention, ultimately only such an amount of cooling Fluid flow through the actuators are actually passed to Cooling the same is needed. For example, the internal combustion engine is still cold, i.e. the engine has its after a cold start Operating temperature has not yet been reached, so they still need it cold actuators no cooling at all, so at least theoretically any cooling fluid flow through the actuators can be prevented and therefore there is no power loss caused by the cooling. However, it should be noted in this context that Possibly use of the lubricating oil of the internal combustion engine as a cooling fluid Always a small amount of lubricating oil for the actuators must be supplied, namely for lubrication thereof. In this case is possibly a complete stop of the supply of lubricating oil to the actuators not possible.
Das erfindungsgemäße Verfahren beinhaltet aber nicht nur eine einfache Abfrage, ob eine Kühlung der Aktuatoren erforderlich ist oder nicht, sondern es soll generell die Menge des zu Kühlzwecken durch die Aktuatoren hindurch geleiteten Fluidstromes derart eingestellt werden, daß letztlich eine kritische (maximale) Bauteiltemperatur der Aktuatoren nicht überschritten wird. Diese besagte Einstellung erfolgt mittels einer geeigneten Ventileinrichtung, die eine mehr oder minder große Menge von Kühl-Fluid durch die Aktuatoren strömen läßt, und zwar insbesondere bzw. im wesentlichen in Abhängigkeit von der aktuellen Bauteiltemperatur der Aktuatoren.However, the method according to the invention does not only include a simple one Query whether cooling of the actuators is necessary or not, but it is generally intended to be the amount of cooling through the actuators guided fluid flow can be set so that ultimately a critical (maximum) component temperature of the actuators is not exceeded becomes. This setting is carried out by means of a suitable valve device, which a more or less large amount of cooling fluid through the Actuators can flow, in particular or essentially in Dependence on the current component temperature of the actuators.
Grundsätzlich kann die aktuelle Bauteiltemperatur eines Aktuators mittels eines geeigneten Sensors gemessen werden, wonach in einer eiektronischen Steuereinheit eine Abfrage bzw. ein Vergleich erfolgt, ob diese aktuelle Temperatur weit unterhalb oder nahe der kritischen maximalen Aktuator-Bauteiltemperatur liegt. Als Resultat dieses Vergleiches wird dann eine mehr oder minder große Menge von Kühl-Fluid durch den bzw. die Aktuator(en) geleitet.In principle, the current component temperature of an actuator can be determined using a suitable sensor are measured, after which in an electronic Control unit a query or a comparison is made whether this current Temperature far below or near the critical maximum actuator component temperature lies. The result of this comparison will be one more or less large amount of cooling fluid through the actuator (s) directed.
Im Sinne einer vorteilhaften Weiterbildung der Erfindung wird vorgeschlagen,
die aktuelle Bauteiltemperatur eines Aktuators in einer den Aktuatoren zugeordneten
elektronischen Steuereinheit annähernd bzw. quasi anhand der
durch die Magnetspulen des Aktuators fließenden elektrischen Stromes zu
ermitteln, da auf diese Weise kein eigenständiger Temperatursensor benötigt
wird. In Kenntnis der an die Magnetspulen des elektromagnetischen Aktuators
angelegten elektrischen Spannung sowie des durch diese fließenden
elektrischen Stromes läßt sich nämlich - wie bekannt - der Spulenwiderstand
ermitteln, der selbst wieder eine signifikante Abhängigkeit von der Aktuator-Temperatur
besitzt. Die Größe des elektrischen Widerstandes der Magnetspulen
repräsentiert somit die Bauteiltemperatur des Aktuators und kann
demzufolge mit einer entsprechenden maximalen kritsichen Größe (für den
Spulen-Widerstand) verglichen werden.
Allgemein ausgedrückt kann somit also eine der aktuellen Bauteiltemperatur
entsprechende elektrische Kenngröße eines Aktuators in einer den Aktuatoren
zugeordneten elektronischen Steuereinheit anhand der durch die Magnetspulen
des Aktuators fließenden elektrischen Stromes ermittelt werden
und in einer elektronischen Steuereinheit mit der kritischen Bauteiltemperatur
oder einer dieser entsprechenden kritischen elektrischen Kenngröße verglichen
werden, woraufhin die letztgenannte Steuereinheit die genannte Ventileinrichtung
im Hinblick auf die Menge des erforderlichen Kühl-Fluidstromes
ansteuert.In the sense of an advantageous development of the invention, it is proposed to determine the current component temperature of an actuator in an electronic control unit assigned to the actuators approximately or quasi on the basis of the electrical current flowing through the magnet coils of the actuator, since in this way no independent temperature sensor is required. Knowing the electrical voltage applied to the magnetic coils of the electromagnetic actuator and the electrical current flowing through them, it is in fact possible - as is known - to determine the coil resistance, which in turn has a significant dependence on the actuator temperature. The size of the electrical resistance of the solenoid coils thus represents the component temperature of the actuator and can therefore be compared with a corresponding maximum critical size (for the coil resistance).
Generally speaking, an electrical characteristic of an actuator corresponding to the current component temperature can thus be determined in an electronic control unit assigned to the actuators on the basis of the electrical current flowing through the solenoid coils of the actuator and compared in an electronic control unit with the critical component temperature or a critical electrical characteristic corresponding to this are, whereupon the latter control unit controls the said valve device with regard to the amount of the required cooling fluid flow.
Claims (2)
- A method of cooling actuators for gate valves of internal combustion engines, wherein a part of a stream of fluid, especially lubricating oil, circulated in the engine is conveyed through each actuator,
characterised in that the amount of fluid conveyed through the actuator or actuators is variable and is adjusted by means of a suitable valve device so that ultimately the critical temperature of the actuator components is not exceeded. - A method according to claim 1, characterised in that an electric parameter of an actuator corresponding to the actual component temperature is determined in an electronic control unit associated with the actuators on the basis of the electric current flowing through the actuator coils and is compared in an electronic control unit with the critical component temperature or with a corresponding critical electric parameter, whereupon the last-mentioned control unit actuates the valves device to obtain the required flow of coolant.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19926412 | 1999-06-10 | ||
| DE19926412A DE19926412B4 (en) | 1999-06-10 | 1999-06-10 | Method for cooling electromagnetic actuators for internal combustion engine lift valves |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1059424A2 EP1059424A2 (en) | 2000-12-13 |
| EP1059424A3 EP1059424A3 (en) | 2001-04-18 |
| EP1059424B1 true EP1059424B1 (en) | 2004-07-28 |
Family
ID=7910754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00111426A Expired - Lifetime EP1059424B1 (en) | 1999-06-10 | 2000-05-26 | Method for cooling electromagnetic valve actuators in an internal combustion engine |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6318312B1 (en) |
| EP (1) | EP1059424B1 (en) |
| DE (2) | DE19926412B4 (en) |
| ES (1) | ES2222134T3 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6532919B2 (en) | 2000-12-08 | 2003-03-18 | Ford Global Technologies, Inc. | Permanent magnet enhanced electromagnetic valve actuator |
| EP1318279B1 (en) * | 2001-12-04 | 2005-02-02 | Ford Global Technologies, Inc. | A permanent magnet enhanced electromagnetic valve actuator |
| US7128032B2 (en) * | 2004-03-26 | 2006-10-31 | Bose Corporation | Electromagnetic actuator and control |
| US8210139B2 (en) * | 2008-08-01 | 2012-07-03 | David Meisel | Engine electronic valve actuation |
| US10526932B2 (en) * | 2008-08-01 | 2020-01-07 | David Meisel | Engine electronic valve actuation |
| US9109714B2 (en) | 2011-11-07 | 2015-08-18 | Sentimetal Journey Llc | Linear valve actuator system and method for controlling valve operation |
| US10385797B2 (en) | 2011-11-07 | 2019-08-20 | Sentimetal Journey Llc | Linear motor valve actuator system and method for controlling valve operation |
| US10100729B2 (en) * | 2015-01-19 | 2018-10-16 | Hamilton Sundstrand Corporation | Cooling device for electro-pneumatic controller |
| US10601293B2 (en) | 2018-02-23 | 2020-03-24 | SentiMetal Journey, LLC | Highly efficient linear motor |
| US10774696B2 (en) | 2018-02-23 | 2020-09-15 | SentiMetal Journey, LLC | Highly efficient linear motor |
| US11326504B2 (en) | 2019-12-23 | 2022-05-10 | Caterpillar Inc. | Cooling control system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1391955A (en) * | 1972-07-12 | 1975-04-23 | British Leyland Austin Morris | Actuating internal combustion engine poppet valves |
| CS188374B1 (en) * | 1975-06-04 | 1979-03-30 | Vaclav Rysan | Method of maintaining the working temperature of parts,notably the injection nozzles of the oil engines |
| JPS58124015A (en) * | 1982-01-20 | 1983-07-23 | Yanmar Diesel Engine Co Ltd | Cooler of engine |
| JP3111922B2 (en) * | 1997-04-02 | 2000-11-27 | トヨタ自動車株式会社 | Cylinder head structure of internal combustion engine equipped with solenoid valve |
| JP3422212B2 (en) * | 1997-04-04 | 2003-06-30 | トヨタ自動車株式会社 | Cylinder head structure of internal combustion engine equipped with solenoid valve |
| DE19714496B4 (en) * | 1997-04-08 | 2008-04-03 | Bayerische Motoren Werke Ag | Electromagnetic actuator for an internal combustion engine globe valve |
| US6116570A (en) * | 1998-03-30 | 2000-09-12 | Siemens Automotive Corporation | Electromagnetic actuator with internal oil system and improved hydraulic lash adjuster |
-
1999
- 1999-06-10 DE DE19926412A patent/DE19926412B4/en not_active Expired - Lifetime
-
2000
- 2000-05-26 EP EP00111426A patent/EP1059424B1/en not_active Expired - Lifetime
- 2000-05-26 DE DE50007177T patent/DE50007177D1/en not_active Expired - Fee Related
- 2000-05-26 ES ES00111426T patent/ES2222134T3/en not_active Expired - Lifetime
- 2000-06-12 US US09/592,543 patent/US6318312B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP1059424A2 (en) | 2000-12-13 |
| DE19926412A1 (en) | 2000-12-21 |
| DE50007177D1 (en) | 2004-09-02 |
| EP1059424A3 (en) | 2001-04-18 |
| ES2222134T3 (en) | 2005-02-01 |
| US6318312B1 (en) | 2001-11-20 |
| DE19926412B4 (en) | 2004-07-15 |
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