EP0845592A1 - Cooling element and fuel injector with cooling element for an internal combustion engine - Google Patents

Cooling element and fuel injector with cooling element for an internal combustion engine Download PDF

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Publication number
EP0845592A1
EP0845592A1 EP96810841A EP96810841A EP0845592A1 EP 0845592 A1 EP0845592 A1 EP 0845592A1 EP 96810841 A EP96810841 A EP 96810841A EP 96810841 A EP96810841 A EP 96810841A EP 0845592 A1 EP0845592 A1 EP 0845592A1
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EP
European Patent Office
Prior art keywords
cooling
cooling element
channels
combustion engine
internal combustion
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
Application number
EP96810841A
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German (de)
French (fr)
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EP0845592B1 (en
Inventor
Peter Baumgartner
Peter Neracher
Urs Heusser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wartsila NSD Schweiz AG
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Wartsila NSD Schweiz AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wartsila NSD Schweiz AG filed Critical Wartsila NSD Schweiz AG
Priority to DE59610663T priority Critical patent/DE59610663D1/en
Priority to EP96810841A priority patent/EP0845592B1/en
Priority to DK96810841T priority patent/DK0845592T3/en
Priority to KR1019970054444A priority patent/KR100481931B1/en
Priority to JP9323161A priority patent/JPH10159559A/en
Priority to CN97123078A priority patent/CN1104550C/en
Publication of EP0845592A1 publication Critical patent/EP0845592A1/en
Application granted granted Critical
Publication of EP0845592B1 publication Critical patent/EP0845592B1/en
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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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors

Definitions

  • the invention relates to a cooling element e.g. for one Fuel injector and a Reciprocating internal combustion engine with fuel injector.
  • a separate cooling circuit contains the nozzle is a nozzle body with a needle seat and Nozzle holes and a cooling jacket, which the Encloses the nozzle body, the nozzle body with its Nozzle holes protrude from the cooling jacket.
  • the cooling jacket contains an inlet channel and an outlet channel for the Coolant and forms a with the valve body annular chamber in which the inlet and outlet channel flow out.
  • the cooling of the injection nozzle in the cylinder cooling integrated, the cooling jacket and the Nozzle body is arranged so that it is in a Cylinder cover trained chamber that protrudes part of the cylinder cooling circuit. In both cooling systems cooling water is passed through the chambers.
  • both systems have the disadvantage on that the distance between the area of Heat exposure and the range of the cooling effect relative is big.
  • the invention has for its object a cooling element to create, in which the disadvantages are eliminated.
  • the channels are designed as blind bores and Blind holes near the area of heat end up.
  • the cooling channels are open on one side and flow into a common space to a free one To cause passage of the cooling medium.
  • One fuel injector for one Reciprocating internal combustion engine is according to the invention with the Characterized feature of the claim.
  • Through the positive connection between the cooling element and Nozzle body ensures good heat transfer.
  • a reciprocating internal combustion engine with one Fuel injection nozzle is according to the invention by Characterized feature of the claim.
  • FIG. 1 to 3 show one as a cylindrical body device 1 shown and a sleeve shown cooling element 2 and according to the invention Arrangements of cooling channels in the cooling element are trained.
  • the cooling channels are as bores trained and the inlet openings are with a predetermined division.
  • the cooling channels are 3 designed as through holes.
  • the cooling channels 3 are inclined and inclined with respect to the body axis 4 trained, i.e. the pitch circle diameter D for the Inlet openings 5 is larger than that Pitch circle diameter d of the outlet openings 6 and Outlet openings 6 are in relation to the inlet openings 5 offset by an angle.
  • each cooling channel 8 is one Radial bore 9 assigned to an outlet opening 10 create.
  • cooling channels 11 designed as blind bores and with respect to Body axis 4 arranged inclined. To be added that the blind bores at a distance h of approx. 3 mm from the End of the sleeve.
  • FIG. 4 shows the arrangement of a device for Fuel injection in a cylinder cover or head 21.
  • the device comprises a cooling element 22, which in a hole is pressed into the cylinder cover 21, one Injection nozzle 23, which is arranged in the cooling element, and a flange 24, a spring assembly 25 and Fasteners 26, 27 to under the injector To keep bias in the cooling element.
  • the Components of an injection nozzle are known.
  • In the Injector 23 in question here has the Nozzle body 31 has a conical section 32, on the tapered end a number of nozzle holes 33 are formed and in which the needle seat is formed is.
  • An inner cone is formed in the cooling element 22, in which the conical section 32 of the nozzle body 31st sits, so that a positive connection exists is.
  • the injection nozzle is included Preload held in the inner cone, so that next to the positive connection also a non-positive connection is present.
  • Fig. 5 shows an injection nozzle of the above described type of a cooling element with a 2 is assigned to the cooling duct arrangement.
  • the Cooling element 41 is sleeve-shaped. At the extent the cooling element has a coolant inlet or outlet in the form of recesses 42, 43 through webs (not shown) separated by approx extend half the circumference and with the cylinder cover 21st Form flow chambers for the cooling medium. This Chambers each have a number of cooling channels 8 in connection.
  • the cooling element 41 has a cylindrical section 44. Adjacent to the Section 44 is a second cylindrical section 45 with a larger outer diameter, which in a third cylindrical section 46 runs out.
  • the second section 45 forms with cylinder cover 21 annular flow chamber 47 for the cooling medium.
  • the cooling channels 8 are formed, only two radial bores 9 being shown in the figure are.
  • a cylinder cover points in the bottom area as is known, a channel system for a cooling circuit.
  • the cooling element 41 is designed and in Cylinder cover 21 arranged so that the cooling channels 8 with the cooling circuit in the cylinder cover in series are switched, the cooling medium in the forced pass flows through the cooling element. Flows during the forced run the coolant from the cylinder cooling circuit into the Inlet opening 42 and into those connected to it Cooling ducts 8. An evaporation or Condensation cooling.
  • the cooling medium flows through the radial bores 9 into the annular chamber 47 and flows through the radial bores 9 in the Cooling channels connecting the outlet opening in the Cylinder cooling circuit back.
  • Fig. 6 shows an injection nozzle
  • the cooling element 51 with a cooling channel arrangement according to FIG. 3 is.
  • the cooling element 51 has the cylindrical section 44 and a second cylindrical section 52, in which the cooling channels 11 are formed.
  • the Cooling element 51 is pressed into the cylinder cover 21 and forms with this a chamber 54 which with the Cooling circuit is connected. In this version flows the cooling medium in free passage from the cooling circuit through the chamber and back into the cooling circuit.
  • the sleeve-shaped cooling element has a plurality of Cooling channels 8, which are oblique with respect to the sleeve axis 4 and / or inclined in the longitudinal extension of the Cooling element are formed. With this arrangement the area of cooling effect to the area of Heat exposure adjusted. If the cooling element Cooling an injector Reciprocating internal combustion engine applied, so the Cooling channels connected in series with the cylinder cooling will.

Abstract

The fuel injector has an injector jet (2) surrounded is cooled by a sleeve (1) which is bored with cooling ducts (8) which connect to the cooling circuit of the cylinder head. The ducts are angled and run between inlet (5) and outlet (6) connections. The bores can be blind bores with the outlets formed by radial bores. The cooling sleeve is positioned around the head of the injector jet and is clamped into position by the same clamping system as secures the injector. The clamping system includes cup springs to press the injector jet into position. No separate cooling connections are required for the cooling sleeve.

Description

Die Erfindung betrifft ein Kühlelement z.B. für eine Brennstoffeinspritzdüse und eine Hubkolbenbrennkraftmaschine mit Brennstoffeinspritzdüse.The invention relates to a cooling element e.g. for one Fuel injector and a Reciprocating internal combustion engine with fuel injector.

Für Brennstoffeinspritzdüsen ist eine Kühlung erforderlich. Es sind zwei Kühlsysteme für Einspritzdüsen bekannt und zwar eine Kühlung mittels separaten Kühlwasserkreislauf oder mittels in der Zylinderkühlung integriertem Kühlwasserkreislauf.There is cooling for fuel injectors required. There are two cooling systems for injectors known and that cooling by means of separate Cooling water circuit or by means of cylinder cooling integrated cooling water circuit.

Wird ein separater Kühlkreislauf vorgesehen, so enthält die Düse einen Düsenkörper mit einem Nadelsitz und Düsenlöchern und einen Kühlmantel, welcher den Düsenkörper umschliesst, wobei der Düsenkörper mit seinen Düsenlöchern aus dem Kühlmantel ragt. Der Kühlmantel enthält einen Zulaufkanal und einen Ablaufkanal für das Kühlmedium und bildet mit dem Ventilkörper eine ringförmige Kammer, in welche der Zu- und Ablaufkanal münden.If a separate cooling circuit is provided, it contains the nozzle is a nozzle body with a needle seat and Nozzle holes and a cooling jacket, which the Encloses the nozzle body, the nozzle body with its Nozzle holes protrude from the cooling jacket. The cooling jacket contains an inlet channel and an outlet channel for the Coolant and forms a with the valve body annular chamber in which the inlet and outlet channel flow out.

Wird die Kühlung der Einspritzdüse in die Zylinderkühlung integriert, so entfällt der Kühlmantel und der Düsenkörper ist so angeordnet, dass dieser in einer im Zylinderdeckel ausgebildeten Kammer ragt, die ein Teil des Zylinderkühlkreislaufes ist. In beiden Kühlsystemen wird Kühlwasser durch die Kammern geleitet.The cooling of the injection nozzle in the cylinder cooling integrated, the cooling jacket and the Nozzle body is arranged so that it is in a Cylinder cover trained chamber that protrudes part of the cylinder cooling circuit. In both cooling systems cooling water is passed through the chambers.

Neben dem grösseren Aufwand für einen separaten Kühlwasserkreislauf, weisen beide Systeme den Nachteil auf, dass der Abstand zwischen dem Bereich der Wärmeeinwirkung und dem Bereich der Kühlwirkung relativ gross ist.In addition to the greater effort for a separate Cooling water circuit, both systems have the disadvantage on that the distance between the area of Heat exposure and the range of the cooling effect relative is big.

Die Erfindung liegt die Aufgabe zugrunde, ein Kühlelement zu schaffen, bei welcher die Nachteile behoben sind.The invention has for its object a cooling element to create, in which the disadvantages are eliminated.

Diese Aufgabe wird erfindungsgemäss mit den Merkmalen des Anspruches 1 gelöst.This object is achieved with the features of Claim 1 solved.

Mit der erfindungsgemässen Anordnung der Kühlkanäle wird der Bereich der Kühlwirkung an den Bereich der Wärmeeinwirkung unter Einhaltung eines geringen Raumbedarfs angepasst.With the arrangement of the cooling channels according to the invention the area of cooling effect to the area of Exposure to heat while maintaining a low Adjusted space requirements.

Als besonders vorteilhaft erweist sich, wenn die Kanäle als Blindbohrungen ausgebildet sind und die Blindbohrungen nahe dem Bereich der Wärmeeinwirkung enden. In diesem Fall tritt in den Kanälen eine Verdampfungs- bzw. Kondensationskühlung auf, welche eine hohe Effizienz hat. Bei einer Ausführungsform sind eine Einlass- und Auslassöffnung, in welche jeweils eine Anzahl von Durchflusskanälen münden und radiale Verbindungskanäle vorgesehen, um einen Zwangsdurchlauf des Kühlmediums zu bewirken. Bei einer anderen Ausführungsform sind die Kühlkanäle einseitig offen und münden in einem gemeinsamen Raum, um einen freien Durchlauf des Kühlmediums zu bewirken.It proves to be particularly advantageous if the channels are designed as blind bores and Blind holes near the area of heat end up. In this case, one occurs in the channels Evaporation or condensation cooling, which a has high efficiency. In one embodiment, one Inlet and outlet opening, in each of which one Number of flow channels open and radial Connection channels provided to a forced pass of the cooling medium. Another one Embodiment, the cooling channels are open on one side and flow into a common space to a free one To cause passage of the cooling medium.

Eine Brennstoffeinspritzdüse für eine Hubkolbenbrennkraftmaschine ist erfindungsgemäss mit dem Merkmal des Anspruches gekennzeichnet. Durch die formschlüssige Verbindung zwischen Kühlelement und Düsenkörper wird eine gute Wärmeübertragung bewirkt.One fuel injector for one Reciprocating internal combustion engine is according to the invention with the Characterized feature of the claim. Through the positive connection between the cooling element and Nozzle body ensures good heat transfer.

Eine Hubkolbenbrennkraftmaschine mit einer Brennstoffeinspritzdüse ist erfindungsgemäss durch das Merkmal des Anspruches gekennzeichnet.A reciprocating internal combustion engine with one Fuel injection nozzle is according to the invention by Characterized feature of the claim.

Damit kann auf einen separaten Kühlkreislauf für die Einspritzdüse verzichtet werden. Wird die Brennstoffdüse unter Vorspannung in dem Kühlelement gehalten, ergibt sich eine verbesserte Wärmeübertragung zwischen Düsenkörper und Kühlelement einerseits und eine beanspruchungsmässige Entlastung der Einspritzdüse.This allows a separate cooling circuit for the Injector are dispensed with. Will the fuel nozzle held in the cooling element under prestress results there is improved heat transfer between Nozzle body and cooling element on the one hand and one Relief of the injector under load.

Nachfolgend wird die Erfindung anhand der beiliegenden Zeichnungen erläutert.The invention is described below with reference to the enclosed Drawings explained.

Es zeigen:

Fig. 1
Eine schematische Darstellung einer ersten Anordnung von Kühlkanälen in einem Kühlelement;
Fig. 2
eine schematische Darstellung einer zweiten Anordnung von Kühlkanälen in einem Kühlelement;
Fig. 3
eine schematische Darstellung einer dritten Anordnung von Kühlkanälen in einem Kühlelement;
Fig. 4
einen Schnitt durch eine Brennstoffeinspritzdüse, welche in einem Zylinderdeckel montiert ist und welcher ein Kühlelement zugeordnet ist;
Fig. 5
einen Abschnitt einer Brennstoffeinspritzdüse, welcher ein Kühlelement mit einer Kühlkanalanordnung gemäss Fig. 2 zugeordnet ist und
Fig. 6
einen Abschnitt einer Brennstoffeinspritzdüse, welcher in Kühlelement mit einer Kühlkanalanordnung gemäss Fig. 3 zugeordnet ist.
Show it:
Fig. 1
A schematic representation of a first arrangement of cooling channels in a cooling element;
Fig. 2
a schematic representation of a second arrangement of cooling channels in a cooling element;
Fig. 3
a schematic representation of a third arrangement of cooling channels in a cooling element;
Fig. 4
a section through a fuel injector which is mounted in a cylinder cover and which is assigned a cooling element;
Fig. 5
a section of a fuel injector, which is assigned a cooling element with a cooling channel arrangement according to FIG. 2 and
Fig. 6
a section of a fuel injector, which is assigned in the cooling element with a cooling channel arrangement according to FIG. 3.

Die Fig. 1 bis 3 zeigen eine als zylindrischer Körper dargestellte Einrichtung 1 und ein als Hülse dargestelltes Kühlelement 2 sowie erfindungsgemässe Anordnungen von Kühlkanälen, die in dem Kühlelement ausgebildet sind. Die Kühlkanäle sind als Bohrungen ausgebildet und die Einlassöffnungen sind mit einer vorbestimmten Teilung angeordnet.1 to 3 show one as a cylindrical body device 1 shown and a sleeve shown cooling element 2 and according to the invention Arrangements of cooling channels in the cooling element are trained. The cooling channels are as bores trained and the inlet openings are with a predetermined division.

Bei der Ausführungsform gemäss Fig. 1 sind die Kühlkanäle 3 als Durchgangslöcher ausgebildet. Die Kühlkanäle 3 sind bezüglich der Körperachse 4 geneigt und schräg ausgebildet, d.h. der Teilkreisdurchmesser D für die Einlassöffnungen 5 ist grösser als der Teilkreisdurchmesser d der Auslassöffnungen 6 und die Auslassöffnungen 6 sind bezüglich den Einlassöffnungen 5 um einen Winkel versetzt.In the embodiment according to FIG. 1, the cooling channels are 3 designed as through holes. The cooling channels 3 are inclined and inclined with respect to the body axis 4 trained, i.e. the pitch circle diameter D for the Inlet openings 5 is larger than that Pitch circle diameter d of the outlet openings 6 and Outlet openings 6 are in relation to the inlet openings 5 offset by an angle.

Bei der Ausführungsform gemäss Fig. 2 sind die Kühlkanäle 8 als Blindbohrungen ausgebildet und gleich wie in Fig. 1 angeordnet. Zusätzlich sind jedem Kühlkanal 8 eine Radialbohrung 9 zugeordnet, um eine Auslassöffnung 10 zu schaffen.In the embodiment according to FIG. 2, the cooling channels are 8 designed as blind bores and the same as in Fig. 1st arranged. In addition, each cooling channel 8 is one Radial bore 9 assigned to an outlet opening 10 create.

Bei der Ausführungsform gemäss Fig. 3 sind die Kühlkanäle 11 als Blindbohrungen ausgebildet und bezüglich der Körperachse 4 geneigt angeordnet. Nachzutragen ist noch, dass die Blindbohrungen im Abstand h von ca. 3 mm von der Stirnseite der Hülse enden. 3 are the cooling channels 11 designed as blind bores and with respect to Body axis 4 arranged inclined. To be added that the blind bores at a distance h of approx. 3 mm from the End of the sleeve.

Es wird auf die Fig. 4 bis 6 Bezug genommen. Die Fig. 4 zeigt die Anordnung einer Einrichtung zur Brennstoffeinspritzung in einem Zylinderdeckel oder -kopf 21. Die Einrichtung umfasst ein Kühlelement 22, das in eine Bohrung im Zylinderdeckel 21 eingepresst ist, eine Einspritzdüse 23, die im Kühlelement angeordnet ist, sowie einen Flansch 24, ein Federpaket 25 und Befestigungsmittel 26, 27, um die Einspritzdüse unter Vorspannung in dem Kühlelement zu halten. Die Bestandteile einer Einspritzdüse sind bekannt. Bei der hier in Rede stehenden Einspritzdüse 23 hat der Düsenkörper 31 einen konischen Abschnitt 32, an dessen verjüngten Ende eine Anzahl von Düsenlöchern 33 ausgebildet sind und in dem der Nadelsitz ausgebildet ist. Im Kühlelement 22 ist ein Innenkonus ausgebildet, in welchem der konische Abschnitt 32 des Düsenkörpers 31 sitzt, so dass eine formschlüssige Verbindung vorhanden ist. Wie bereits erwähnt ist die Einspritzdüse mit Vorspannung in dem Innenkonus gehalten, so dass neben der formschlüssigen auch eine kraftschlüssige Verbindung vorliegt. Mit der form- und kraftschlüssigen Verbindung zwischen Düsenkörper und Kühlelement in Verbindung mit der Pressverbindung zwischen der Kühlelemente mit dem Zylinderdeckel, wird die Einspritzdüse in vorteilhafter Weise beanspruchungsmässig entlastet.4 to 6, reference is made. 4 shows the arrangement of a device for Fuel injection in a cylinder cover or head 21. The device comprises a cooling element 22, which in a hole is pressed into the cylinder cover 21, one Injection nozzle 23, which is arranged in the cooling element, and a flange 24, a spring assembly 25 and Fasteners 26, 27 to under the injector To keep bias in the cooling element. The Components of an injection nozzle are known. In the Injector 23 in question here has the Nozzle body 31 has a conical section 32, on the tapered end a number of nozzle holes 33 are formed and in which the needle seat is formed is. An inner cone is formed in the cooling element 22, in which the conical section 32 of the nozzle body 31st sits, so that a positive connection exists is. As already mentioned, the injection nozzle is included Preload held in the inner cone, so that next to the positive connection also a non-positive connection is present. With the positive and non-positive connection between the nozzle body and the cooling element in connection with the press connection between the cooling elements with the Cylinder cover, the injector becomes more advantageous Relieved in terms of stress.

Die Fig. 5 zeigt eine Einspritzdüse der vorstehend beschriebenen Art, der ein Kühlelement mit einer Kühlkanalanordnung gemäss Fig. 2 zugeordnet ist. Das Kühlelement 41 ist hülsenförmig ausgebildet. Am Umfang weist das Kühlelement einen Kühlmitteleinlass bzw. -auslass in Form von Ausnehmungen 42, 43, die durch Stege (nicht dargestellt) getrennt sich jeweils um ca. den halben Umfang erstrecken und mit dem Zylinderdeckel 21 Durchflusskammern für das Kühlmedium bilden. Diese Kammern stehen jeweils mit einer Anzahl von Kühlkanälen 8 in Verbindung. An dem Ende, welches dem Brennraum zugewandt ist, weist das Kühlelement 41 einen zylindrischen Abschnitt 44 auf. Angrenzend an den Abschnitt 44 ist ein zweiter zylindrischer Abschnitt 45 mit einem grösseren Aussendurchmesser ausgebildet, der in einen dritten zylindrischen Abschnitt 46 ausläuft. Der zweite Abschnitt 45 bildet mit dem Zylinderdeckel 21 ringförmige Durchflusskammer 47 für das Kühlmedium. Im Bereich der vorstehend genannten Abschnitte 44, 45 und 46 und dem Innenkonus sind die Kühlkanäle 8 ausgebildet, wobei in der Figur nur zwei Radialbohrungen 9 dargestellt sind. Ein Zylinderdeckel weist im Bodenbereich bekanntlich ein Kanalsystem für einen Kühlkreislauf auf. Das Kühlelement 41 ist so ausgestaltet und im Zylinderdeckel 21 so angeordnet, dass die Kühlkanäle 8 mit dem Kühlkreislauf im Zylinderdeckel in Serie geschaltet sind, wobei das Kühlmedium im Zwangsdurchlauf das Kühlelement durchströmt. Beim Zwangsdurchlauf strömt das Kühlmittel aus dem Zylinderkühlkreislauf in die Einlassöffnung 42 und in die mit dieser verbundenen Kühlkanäle 8. In den Kühlkanälen tritt eine Verdampfungs- bzw. Kondensationskühlung auf. Das Kühlmedium strömt durch die Radialbohrungen 9 in die Ringkammer 47 und strömt durch die Radialbohrungen 9 in die mit der Auslassöffnung verbindenden Kühlkanäle in den Zylinderkühlkreislauf zurück. Durch die Anordnung der Kühlkanäle 8 ergibt sich ein gekrümmter Bereich der Kühlwirkung der den Düsenkörper umschliesst. Dieser Bereich ist durch gestrichelte Linien markiert.Fig. 5 shows an injection nozzle of the above described type of a cooling element with a 2 is assigned to the cooling duct arrangement. The Cooling element 41 is sleeve-shaped. At the extent the cooling element has a coolant inlet or outlet in the form of recesses 42, 43 through webs (not shown) separated by approx extend half the circumference and with the cylinder cover 21st Form flow chambers for the cooling medium. This Chambers each have a number of cooling channels 8 in connection. At the end, which is the combustion chamber facing, the cooling element 41 has a cylindrical section 44. Adjacent to the Section 44 is a second cylindrical section 45 with a larger outer diameter, which in a third cylindrical section 46 runs out. Of the second section 45 forms with cylinder cover 21 annular flow chamber 47 for the cooling medium. in the Area of the aforementioned sections 44, 45 and 46 and the inner cone, the cooling channels 8 are formed, only two radial bores 9 being shown in the figure are. A cylinder cover points in the bottom area as is known, a channel system for a cooling circuit. The cooling element 41 is designed and in Cylinder cover 21 arranged so that the cooling channels 8 with the cooling circuit in the cylinder cover in series are switched, the cooling medium in the forced pass flows through the cooling element. Flows during the forced run the coolant from the cylinder cooling circuit into the Inlet opening 42 and into those connected to it Cooling ducts 8. An evaporation or Condensation cooling. The cooling medium flows through the radial bores 9 into the annular chamber 47 and flows through the radial bores 9 in the Cooling channels connecting the outlet opening in the Cylinder cooling circuit back. By arranging the Cooling channels 8 results in a curved area of the Cooling effect that encloses the nozzle body. This The area is marked by dashed lines.

Die Fig. 6 zeigt eine Einspritzdüse, der ein Kühlelement 51 mit einer Kühlkanalanordnung gemäss Fig. 3 zugeordnet ist. Das Kühlelement 51 weist den zylindrischen Abschnitt 44 und einen zweiten zylindrischen Abschnitt 52 auf, in welchen die Kühlkanäle 11 ausgebildet sind. Das Kühlelement 51 ist im Zylinderdeckel 21 eingepresst und bildet mit diesem eine Kammer 54, die mit dem Kühlkreislauf verbunden ist. Bei dieser Ausführung strömt das Kühlmedium im freien Durchlauf aus dem Kühlkreislauf durch die Kammer und in den Kühlkreislauf zurück.Fig. 6 shows an injection nozzle, the cooling element 51 with a cooling channel arrangement according to FIG. 3 is. The cooling element 51 has the cylindrical section 44 and a second cylindrical section 52, in which the cooling channels 11 are formed. The Cooling element 51 is pressed into the cylinder cover 21 and forms with this a chamber 54 which with the Cooling circuit is connected. In this version flows the cooling medium in free passage from the cooling circuit through the chamber and back into the cooling circuit.

Das hülsenförmige Kühlelement weist eine Mehrzahl von Kühlkanälen 8 auf, die bezüglich der Hülsenachse 4 schräg und/oder geneigt in der Längserstreckung des Kühlelementes ausgebildet sind. Mit dieser Anordnung wird der Bereich der Kühlwirkung an den Bereich der Wärmeeinwirkung angepasst. Wird das Kühlelement zur Kühlung einer Einspritzdüse einer Hubkolbenbrennkraftmaschine angewendet, so können die Kühlkanäle in Serie mit der Zylinderkühlung geschaltet werden.The sleeve-shaped cooling element has a plurality of Cooling channels 8, which are oblique with respect to the sleeve axis 4 and / or inclined in the longitudinal extension of the Cooling element are formed. With this arrangement the area of cooling effect to the area of Heat exposure adjusted. If the cooling element Cooling an injector Reciprocating internal combustion engine applied, so the Cooling channels connected in series with the cylinder cooling will.

Claims (7)

Kühlelement gekennzeichnet durch einen hülsenförmigen Körper (1), welcher mit einer zu kühlende Einrichtung (2) verbindbar ist und durch eine Mehrzahl von Kühlkanälen (3, 8, 11) die bezüglich der Körperachse (4) schräg und/oder geneigt in der Längserstreckung des Körpers (1) ausgebildet sind.Cooling element characterized by a sleeve-shaped Body (1), which with a device to be cooled (2) is connectable and by a plurality of Cooling channels (3, 8, 11) with respect to the body axis (4) obliquely and / or inclined in the longitudinal extent of the body (1) are formed. Kühlelement nach Anspruch 1, dadurch gekennzeichnet, dass die Kanäle (8, 11) als Blindbohrungen ausgebildet sind.Cooling element according to claim 1, characterized in that the channels (8, 11) as blind holes are trained. Kühlelement nach Anspruch 2, dadurch gekennzeichnet, dass jedem Kühlkanal (8) ein radial verlaufender Kanal (9) zugeordnet ist.Cooling element according to claim 2, characterized in that each cooling channel (8) has a radial one Channel (9) is assigned. Element nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass mindestens eine Einlass- (42) und Auslassöffnung (43) für das Kühlmedium vorgesehen ist und dass jeweils eine vorbestimmte Anzahl von Durchflusskanälen (8) in die Einlass- bzw. Auslassöffnung münden (Fig. 5).Element according to one of claims 1 to 3, characterized characterized in that at least one inlet (42) and outlet opening (43) for the cooling medium and that in each case a predetermined number of Flow channels (8) into the inlet or Outlet opening open (Fig. 5). Brennstoffeinspritzdüse für eine Hubkolbenbrennkraftmaschine, mit einem Düsenkörper und mit einem Kühlelement nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Kühlelement (22) mit dem Düsenkörper (31) formschlüssig verbunden ist (Fig. 4).Fuel injector for one Reciprocating piston internal combustion engine, with a nozzle body and with a cooling element according to one of claims 1 to 4, characterized in that the cooling element (22) positively connected to the nozzle body (31) is (Fig. 4). Hubkolbenbrennkraftmaschine mit einer Brennstoffeinspritzdüse nach Anspruch 5, dadurch gekennzeichnet, dass das Kühlelement (22, 51) im Zylinderdeckel (21) angeordnet ist, derart, dass die Kühlkanäle in Serie mit dem Kühlkreislauf im Zylinderdeckel geschaltet sind.Reciprocating internal combustion engine with one Fuel injection nozzle according to claim 5, characterized characterized in that the cooling element (22, 51) in Cylinder cover (21) is arranged such that the Cooling channels in series with the cooling circuit in the Cylinder covers are switched. Brennkraftmaschine nach Anspruch 6, dadurch gekennzeichnet, dass die Brennstoffeinspritzdüse unter Vorspannung in dem Kühlelement (22) gehalten ist.Internal combustion engine according to claim 6, characterized characterized that the fuel injector held in the cooling element (22) under prestress is.
EP96810841A 1996-12-02 1996-12-02 Cooling element and fuel injector with cooling element for an internal combustion engine Expired - Lifetime EP0845592B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE59610663T DE59610663D1 (en) 1996-12-02 1996-12-02 Cooling element and injection nozzle with cooling element for a reciprocating piston internal combustion engine
EP96810841A EP0845592B1 (en) 1996-12-02 1996-12-02 Cooling element and fuel injector with cooling element for an internal combustion engine
DK96810841T DK0845592T3 (en) 1996-12-02 1996-12-02 Cooling element and injection nozzle with cooling element for a piston combustion engine
KR1019970054444A KR100481931B1 (en) 1996-12-02 1997-10-23 Cooling member for reciprocating piston combustion engine and spray nozzle equipped with the cooling member
JP9323161A JPH10159559A (en) 1996-12-02 1997-11-25 Cooling member in reciprocating piston internal combustion engine and injection nozzle provided with the same cooling member
CN97123078A CN1104550C (en) 1996-12-02 1997-12-01 Cooling element and injection nozzle with cooling element for reciprocating piston combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96810841A EP0845592B1 (en) 1996-12-02 1996-12-02 Cooling element and fuel injector with cooling element for an internal combustion engine

Publications (2)

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EP0845592A1 true EP0845592A1 (en) 1998-06-03
EP0845592B1 EP0845592B1 (en) 2003-08-13

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EP96810841A Expired - Lifetime EP0845592B1 (en) 1996-12-02 1996-12-02 Cooling element and fuel injector with cooling element for an internal combustion engine

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JP (1) JPH10159559A (en)
KR (1) KR100481931B1 (en)
CN (1) CN1104550C (en)
DE (1) DE59610663D1 (en)
DK (1) DK0845592T3 (en)

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KR100481931B1 (en) * 1996-12-02 2005-07-18 베르트질레 슈바이츠 악티엔게젤샤프트 Cooling member for reciprocating piston combustion engine and spray nozzle equipped with the cooling member
US7090145B2 (en) 2002-09-26 2006-08-15 Westport Research Inc. Liquid cooled fuel injection valve and method of operating a liquid cooled fuel injection valve
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GB2504517A (en) * 2012-08-01 2014-02-05 Perkins Engines Co Ltd A sleeve with integrated heat pipes for seating engine components in a cylinder head
JP6954101B2 (en) 2017-12-25 2021-10-27 株式会社デンソー Cooling device for additive injection valve
JP6954103B2 (en) 2017-12-25 2021-10-27 株式会社デンソー Cooling device for additive injection valve
JP6954102B2 (en) 2017-12-25 2021-10-27 株式会社デンソー Additive injection valve cooling device and cooling system
CN108661835A (en) * 2018-06-20 2018-10-16 潍柴重机股份有限公司 Oil sprayer bushing

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Also Published As

Publication number Publication date
CN1104550C (en) 2003-04-02
EP0845592B1 (en) 2003-08-13
KR100481931B1 (en) 2005-07-18
CN1188844A (en) 1998-07-29
JPH10159559A (en) 1998-06-16
DK0845592T3 (en) 2003-09-08
DE59610663D1 (en) 2003-09-18
KR19980063537A (en) 1998-10-07

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