EP0222402A2 - Cooling air guiding device for an air cooled internal-combustion engine - Google Patents

Cooling air guiding device for an air cooled internal-combustion engine Download PDF

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Publication number
EP0222402A2
EP0222402A2 EP86115779A EP86115779A EP0222402A2 EP 0222402 A2 EP0222402 A2 EP 0222402A2 EP 86115779 A EP86115779 A EP 86115779A EP 86115779 A EP86115779 A EP 86115779A EP 0222402 A2 EP0222402 A2 EP 0222402A2
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EP
European Patent Office
Prior art keywords
combustion engine
internal combustion
row
cooling air
cylinders
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Granted
Application number
EP86115779A
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German (de)
French (fr)
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EP0222402B1 (en
EP0222402A3 (en
Inventor
Hans Stadler
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Kloeckner Humboldt Deutz AG
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Kloeckner Humboldt Deutz AG
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Priority to AT86115779T priority Critical patent/ATE50828T1/en
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Publication of EP0222402A3 publication Critical patent/EP0222402A3/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P1/00—Air cooling
    • F01P1/02—Arrangements for cooling cylinders or cylinder heads, e.g. ducting cooling-air from its pressure source to cylinders or along cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/06—Guiding or ducting air to, or from, ducted fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/20—Multi-cylinder engines with cylinders all in one line

Definitions

  • the invention relates to an air-cooled internal combustion engine with a cooling air duct according to the preamble of claim 1.
  • An air-cooled internal combustion engine of this type is known from DE-PS 11 35 711.
  • the fan arranged to generate the cooling air flow is fastened lying next to the first cylinder in such a way that the incoming cooling air flow enters the cooling air duct next to the first cylinder.
  • the cooling fins of the cylinder heads are arranged transversely to the longitudinal center axis of the row of cylinders, since the cooling air - also in the region of the first cylinder - flows through the row of cylinders essentially transversely to the longitudinal center axis.
  • the lateral offset of the blower to the cylinder head row (distance from the longitudinal center axis - blower to the longitudinal center axis - cylinder head row) essentially determines the installation width of an air-cooled engine. This offset cannot be reduced arbitrarily, since in particular the transverse cooling fins of the first cylinder adjacent to the fan block the fan outlet and would thus reduce the efficiency.
  • the invention has for its object to design the cooling air duct of an air-cooled internal combustion engine such that the lateral offset of the fan to the longitudinal center axis of the row of cylinders can be kept as low as possible.
  • this object is achieved by the characterizing features of the first claim. Due to the cooling fins oriented in the overlap area of the fan and the row of cylinders, approximately in the flow direction of the incoming cooling air flow, a hindrance to the incoming cooling air is largely avoided.
  • the cooling fins arranged according to the invention deflect the cooling air from its inflow direction in the transverse direction within the first cylinder head.
  • the cooling fins are preferably aligned approximately parallel to the longitudinal center axis of the row of cylinders.
  • the section shown in FIG. 1 shows a plurality of cylinders 1, 2, 3, which are arranged in a row and carry a block cylinder head.
  • the block cylinder head is fastened to the latter by means of fastening screws which are screwed into the cylinder blocks by cylinder head pipes 21.
  • a blower 4 in the longitudinal direction of the cylinder bank 5 in the area of the first cylinder 1, which blower is designed as an axial blower in the exemplary embodiment shown.
  • the fan 4 has a housing jacket 17, in which a stator 17a is arranged, which holds the hub of the impeller 17b centrally.
  • the fan 4 generates a cooling air flow K which is directed essentially parallel to the longitudinal central axis 14 of the cylinder bank 5.
  • a cooling air guide 7 adjoins the fan 4 arranged in front of the cylinder bank 5 and redirects the cooling air flow K entering in the longitudinal direction of the cylinder bank 5 such that the cooling air essentially flows through the cylinder bank and exits in the direction of arrow 6.
  • the cooling fins 20 of the cylinder heads 1a, 2a, 3a are arranged transversely to the row of cylinders 5 in accordance with the flow in the direction of the arrow 6 and are essentially at right angles to the longitudinal central axis 14.
  • the blower 4 is arranged in such a way that part of the cooling air flow K in the longitudinal direction of the cylinder bank 5 on the first Zy linderkopf 1a hits.
  • the blower 4 is arranged in such a way that its longitudinal central axis 15 lies parallel to the longitudinal central axis 14 of the cylinder bank 5, an outer surface line 16 of the housing shell 17 lying in the longitudinal center plane 14a (FIG. 2) of the cylinder bank 5.
  • the cross section 12 of the axial fan 4 overlaps - seen in the direction of arrow A - partially with the first cylinder 1 or its cylinder head 1a (FIG. 2).
  • the cooling fins 8, 9, 10 of the cylinder head 1 a lying in the overlap region of the blower 4 with the first cylinder 1 are aligned according to the invention approximately in the flow direction of the incoming cooling air flow K. They are preferably parallel to the longitudinal center axis 14 of the row of cylinders 5. It can also be expedient to arrange the cooling fins at an angle to the longitudinal center axis 14, this angle being an obtuse angle to the blower 14 or an acute angle.
  • the cooling fin 8 directly adjacent to the cooling air guide 7 is longest, while the cooling fin 9, 10 lying between the cooling fin 8 and the longitudinal central axis 14 is designed with decreasing length toward the longitudinal central axis 14.
  • the cooling fins 8, 9, 10 preferably extend up to approximately a straight line 19 which forms an angle 18 which is open to the blower 4 with the longitudinal center axis 14.
  • This angle can be an acute or an obtuse angle, with an obtuse angle being preferred.
  • the cooling fins 8, 9, 10 in the exemplary embodiment according to FIG. 1 are distributed over approximately a quarter of the area of the cylinder head 1 a and aligned in the flow direction of the incoming cooling air K parallel to the longitudinal central axis 14, while the remaining cooling fins pen 20 are distributed over the remaining surface of the cylinder head 1 a and lie transversely to the cooling air flow K (at right angles to the longitudinal central axis 14).
  • a cylinder head row is shown as a preferred embodiment, in which only the first cylinder head 1a has some cooling fins 8, 9, 10 aligned in the flow direction of the incoming cooling air. It may be advantageous to also provide the following cylinder heads with one or more cooling fins which are aligned in the longitudinal direction of the row of cylinder heads.
  • the cooling fins 8, 9, 10 are arranged separately from the cooling fins 20 lying transversely to the longitudinal center axis 14. This separation can be provided in such a way that a type of channel is formed between the ribs oriented in the longitudinal direction and the ribs oriented in the transverse direction.
  • the cooling fins 8.1, 9.1, 10.1 aligned in the longitudinal direction of the cylinder row in such a way that they each merge into a transverse cooling fin 20.1 (FIGS. 3 and 4).
  • the transitions are designed with large deflection radii R, which contribute to low-resistance air deflection.
  • 4 shows a design in which the transition is formed from a straight fin sections 30, which, with appropriately selected transition radii, lie on the cooling fin 8.1 or 9.1 or 10.1 lying parallel to the longitudinal central axis 14 and the associated one lying at right angles to the longitudinal central axis 14 Cooling fin 20.1 connects.
  • the cooling fins 8.1, 9.1, 10.1 and 20.1 correspond to the longitudinal Extension of the rib sections 30 is shorter.
  • the rib sections 30 lie or at an angle of approximately 45 ° to the longitudinal central axis.
  • the foremost, transversely positioned cooling fin 11 of the cylinder head 1 a, which is adjacent to the blower 4, is L-shaped in plan view, its smaller leg 11 a lying in the plane 14 a (FIG. 2) of the longitudinal central axis 14 of the cylinder bank 5.
  • Both the transverse cooling fins 20 and the longitudinally oriented cooling fins 8, 9, 10 and 11a are designed as load-bearing elements for supporting the combustion chamber floor 22 against the valve or / and camshaft trough 13.

Abstract

An air-cooled internal combustion engine having a series of in-line cylinders with a cooling air blower adjacent an end cylinder. The blower delivers a stream of cooling air in the longitudinal direction of the engine which is redirected by air guide means laterally across the cylinders. To facilitate locating the blower nearer to the longitudinal central plane of the engine, several laterally spaced cooling fin parts are formed on the head structure of the end cylinder in alignment with the direction of flow of the stream of cooling air from the blower so that the overlapping relationship between the end cylinder head structure and the cross section of the blower does not adversely impede the air stream from the blower.

Description

Die Erfindung betrifft eine luftgekühlte Brennkraftmaschi­ne mit einer Kühlluftführung gemäß dem Oberbegriff des An­spruchs 1.The invention relates to an air-cooled internal combustion engine with a cooling air duct according to the preamble of claim 1.

Eine luftgekühlte Brennkraftmaschine dieser Art ist aus der DE-PS 11 35 711 bekannt. Das zur Erzeugung des Kühl­luftstroms angeordnete Gebläse ist neben dem ersten Zylin­der liegend so befestigt, daß der eintretende Kühlluft­strom neben dem ersten Zylinder in die Kühlluftführung eintritt. Die Kühlrippen der Zylinderköpfe sind dabei quer zur Längsmittelachse der Zylinderreihe angeordnet, da die Kühlluft - auch im Bereich des ersten Zylinders - im we­sentlichen quer zur Längsmittelachse die Zylinderreihe durchströmt.An air-cooled internal combustion engine of this type is known from DE-PS 11 35 711. The fan arranged to generate the cooling air flow is fastened lying next to the first cylinder in such a way that the incoming cooling air flow enters the cooling air duct next to the first cylinder. The cooling fins of the cylinder heads are arranged transversely to the longitudinal center axis of the row of cylinders, since the cooling air - also in the region of the first cylinder - flows through the row of cylinders essentially transversely to the longitudinal center axis.

Der seitliche Versatz des Gebläses zur Zylinderkopfreihe, (Abstand Längsmittelachse - Gebläse zur Längsmittel­achse - Zylinderkopfreihe) bestimmt wesentlich die Einbau­breite eines luftgekühlten Motors. Dieser Versatz kann nicht beliebig verringert werden, da insbesondere die quergestellten Kühlrippen des dem Gebläse benachbarten ersten Zylinders den Gebläseaustritt versperren und so den Wirkungsgrad verringern würde.The lateral offset of the blower to the cylinder head row (distance from the longitudinal center axis - blower to the longitudinal center axis - cylinder head row) essentially determines the installation width of an air-cooled engine. This offset cannot be reduced arbitrarily, since in particular the transverse cooling fins of the first cylinder adjacent to the fan block the fan outlet and would thus reduce the efficiency.

Der Erfindung liegt die Aufgabe zugrunde, die Kühlluft­führung einer luftgekühlten Brennkraftmaschine derart aus­zubilden, daß der seitliche Versatz des Gebläses zur Längsmittelachse der Zylinderreihe möglichst gering gehal­ten werden kann.The invention has for its object to design the cooling air duct of an air-cooled internal combustion engine such that the lateral offset of the fan to the longitudinal center axis of the row of cylinders can be kept as low as possible.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnen­den Merkmale des ersten Anspruchs gelöst. Aufgrund der im Überdeckungsbereich des Gebläses und der Zylinderreihe et­wa in Strömungsrichtung des einströmenden Kühlluftstroms ausgerichteten Kühlrippen wird eine Behinderung der ein­strömenden Kühlluft weitgehend vermieden. Die erfindungs­gemäß angeordneten Kühlrippen lenken innerhalb des ersten Zylinderkopfes die Kühlluft von ihrer Einströmrichtung in Querrichtung um. Dabei sind die Kühlrippen vorzugsweise etwa parallel zur Längsmittelachse der Zylinderreihe aus­gerichtet. Durch diese Maßnahmen kann die Einbaulänge und Einbaubreite eines luftgekühlten Motors erheblich redu­ziert werden.According to the invention, this object is achieved by the characterizing features of the first claim. Due to the cooling fins oriented in the overlap area of the fan and the row of cylinders, approximately in the flow direction of the incoming cooling air flow, a hindrance to the incoming cooling air is largely avoided. The cooling fins arranged according to the invention deflect the cooling air from its inflow direction in the transverse direction within the first cylinder head. The cooling fins are preferably aligned approximately parallel to the longitudinal center axis of the row of cylinders. These measures can significantly reduce the installation length and width of an air-cooled motor.

Weitere Merkmale der Erfindung ergeben sich aus den weite­ren Ansprüchen, der Beschreibung und den Zeichnungen, die Ausführungsbeispiele der Erfindung zeigen und im folgenden näher beschrieben sind. Es zeigen:

  • Fig. 1 in Draufsicht einen Schnitt durch die Kühl­luftführung einer Brennkraftmaschine in Höhe der Zylinderköpfe längs der Linie B-B in Fig. 2,
  • Fig. 2 eine Ansicht gemäß Pfeil A aus Fig. 1 auf das Kühlgebläse mit dahinter angeordneten Zylinder­köpfen,
  • Fig. 3 eine Draufsicht auf einen Zylinderkopf mit einer Kühlrippenanordnung anderer Ausführung,
  • Fig. 4 eine Draufsicht auf einen Zylinderkopf mit einer weiteren Ausführungsmöglichkeit der Kühlrippen
Further features of the invention result from the further claims, the description and the drawings, which show exemplary embodiments of the invention and are described in more detail below. Show it:
  • 1 is a plan view of a section through the cooling air duct of an internal combustion engine at the level of the cylinder heads along the line BB in FIG. 2,
  • 2 shows a view according to arrow A from FIG. 1 of the cooling fan with cylinder heads arranged behind it,
  • 3 is a plan view of a cylinder head with a cooling fin arrangement of another design,
  • Fig. 4 is a plan view of a cylinder head with a further embodiment of the cooling fins

Der in Fig. 1 dargestellte Schnitt zeigt mehrere in einer Reihe hintereinander angeordnete Zylinder 1,2,3, die einen Blockzylinderkopf tragen. Der Blockzylinderkopf ist mit­tels Befestigungsschrauben, die durch Zylinderkopfpfeifen 21 in die Zylinderblöcke eingeschraubt sind, an diesem be­festigt. Zur Kühlung liegt in Längsrichtung der Zylinder­reihe 5 im Bereich des ersten Zylinders 1 ein Gebläse 4, das im gezeigten Ausführungsbeispiel als Axialgebläse aus­geführt ist. Das Gebläse 4 hat einen Gehäusemantel 17, in dem ein Leitrad 17a angeordnet ist, das die Nabe des Ge­bläserades 17b zentrisch hält. Das Gebläse 4 erzeugt einen Kühlluftstrom K, der im wesentlichen parallel zur Längs­mittelachse 14 der Zylinderreihe 5 gerichtet ist. An das vor der Zylinderreihe 5 angeordnete Gebläse 4 schließt ei­ne Kühlluftführung 7 an, die den in Längsrichtung der Zy­linderreihe 5 eintretenden Kühlluftstrom K derart umlei­tet, daß die Kühlluft im wesentlichen quer zur Zylinder­reihe diese durchströmt und in Pfeilrichtung 6 austritt. Die Kühlrippen 20 der Zylinderköpfe 1a,2a,3a sind - gemäß der Strömung in Pfeilrichtung 6 - quer zur Zylinderreihe 5 angeordnet und liegen im wesentlichen rechtwinklig zur Längsmittelachse 14.The section shown in FIG. 1 shows a plurality of cylinders 1, 2, 3, which are arranged in a row and carry a block cylinder head. The block cylinder head is fastened to the latter by means of fastening screws which are screwed into the cylinder blocks by cylinder head pipes 21. For cooling, there is a blower 4 in the longitudinal direction of the cylinder bank 5 in the area of the first cylinder 1, which blower is designed as an axial blower in the exemplary embodiment shown. The fan 4 has a housing jacket 17, in which a stator 17a is arranged, which holds the hub of the impeller 17b centrally. The fan 4 generates a cooling air flow K which is directed essentially parallel to the longitudinal central axis 14 of the cylinder bank 5. A cooling air guide 7 adjoins the fan 4 arranged in front of the cylinder bank 5 and redirects the cooling air flow K entering in the longitudinal direction of the cylinder bank 5 such that the cooling air essentially flows through the cylinder bank and exits in the direction of arrow 6. The cooling fins 20 of the cylinder heads 1a, 2a, 3a are arranged transversely to the row of cylinders 5 in accordance with the flow in the direction of the arrow 6 and are essentially at right angles to the longitudinal central axis 14.

Zur Reduzierung der Einbaulänge sowie der Einbaubreite ei­nes luftgekühlten Motors ist nunmehr vorgesehen, das Ge­bläse 4 derart anzuordnen, daß ein Teil des Kühlluftstroms K in Längsrichtung der Zylinderreihe 5 auf den ersten Zy­ linderkopf 1a auftrifft. Hierzu ist das Gebläse 4 derart angeordnet, daß seine Längsmittelachse 15 parallel zur Längsmittelachse 14 der Zylinderreihe 5 liegt, wobei eine äußere Mantellinie 16 des Gehäusemantels 17 in der Längs­mittelebene 14a (Fig. 2) der Zylinderreihe 5 liegt. Der Querschnitt 12 des Axialgebläses 4 überdeckt sich da­bei - in Pfeilrichtung A gesehen - teilweise mit dem ersten Zylinder 1 bzw. dessen Zylinderkopf 1a (Fig. 2). Die im Überdeckungsbereich des Gebläses 4 mit dem ersten Zylinder 1 liegenden Kühlrippen 8,9,10 des Zylinderkopfes 1a sind gemäß der Erfindung etwa in Strömungsrichtung des einströmenden Kühlluftstroms K ausgerichtet. Sie liegen vorzugsweise parallel zur Längsmittelachse 14 der Zylin­derreihe 5. Es kann auch zweckmäßig sein, die Kühlrippen in einem Winkel zur Längsmittelachse 14 anzuordnen, wobei dieser Winkel ein zum Gebläse 14 offener, stumpfer Winkel oder ein spitzer Winkel sein kann. Die der Kühlluftführung 7 unmittelbar benachbarte Kühlrippe 8 ist am längsten aus­gebildet, während die zwischen der Kühlrippe 8 und der Längsmittelachse 14 liegenden Kühlrippe 9,10 zur Längsmit­telachse 14 hin mit abnehmender Länge ausgebildet sind. Hierbei erstrecken sich die Kühlrippen 8,9,10 vorzugsweise bis etwa an eine Gerade 19, die mit der Längsmittelachse 14 einen zum Gebläse 4 offenen Winkel 18 bildet. Dieser Winkel kann ein spitzer oder ein stumpfer Winkel sein, wo­bei ein stumpfer Winkel vorgezogen wird.To reduce the installation length and the installation width of an air-cooled engine, it is now provided to arrange the blower 4 in such a way that part of the cooling air flow K in the longitudinal direction of the cylinder bank 5 on the first Zy linderkopf 1a hits. For this purpose, the blower 4 is arranged in such a way that its longitudinal central axis 15 lies parallel to the longitudinal central axis 14 of the cylinder bank 5, an outer surface line 16 of the housing shell 17 lying in the longitudinal center plane 14a (FIG. 2) of the cylinder bank 5. The cross section 12 of the axial fan 4 overlaps - seen in the direction of arrow A - partially with the first cylinder 1 or its cylinder head 1a (FIG. 2). The cooling fins 8, 9, 10 of the cylinder head 1 a lying in the overlap region of the blower 4 with the first cylinder 1 are aligned according to the invention approximately in the flow direction of the incoming cooling air flow K. They are preferably parallel to the longitudinal center axis 14 of the row of cylinders 5. It can also be expedient to arrange the cooling fins at an angle to the longitudinal center axis 14, this angle being an obtuse angle to the blower 14 or an acute angle. The cooling fin 8 directly adjacent to the cooling air guide 7 is longest, while the cooling fin 9, 10 lying between the cooling fin 8 and the longitudinal central axis 14 is designed with decreasing length toward the longitudinal central axis 14. Here, the cooling fins 8, 9, 10 preferably extend up to approximately a straight line 19 which forms an angle 18 which is open to the blower 4 with the longitudinal center axis 14. This angle can be an acute or an obtuse angle, with an obtuse angle being preferred.

In Draufsicht gesehen sind die Kühlrippen 8,9,10 im Aus­führungsbeispiel nach Fig. 1 etwa über ein Viertel der Fläche des Zylinderkopfes 1a verteilt und in Strömungs­richtung der einströmenden Kühlluft K parallel zur Längs­mittelachse 14 ausgerichtet, während die übrigen Kühlrip­ pen 20 über die restliche Fläche des Zylinderkopfes 1a verteilt sind und quer zum Kühlluftstrom K (im rechten Winkel zur Längsmittelachse 14) liegen.Viewed in plan view, the cooling fins 8, 9, 10 in the exemplary embodiment according to FIG. 1 are distributed over approximately a quarter of the area of the cylinder head 1 a and aligned in the flow direction of the incoming cooling air K parallel to the longitudinal central axis 14, while the remaining cooling fins pen 20 are distributed over the remaining surface of the cylinder head 1 a and lie transversely to the cooling air flow K (at right angles to the longitudinal central axis 14).

Im dargestellten Ausführungsbeispiel ist als bevorzugte Ausführungsform eine Zylinderkopfreihe gezeigt, bei der nur der erste Zylinderkopf 1a einige in Strömungsrichtung der einströmenden Kühlluft ausgerichtete Kühlrippen 8,9,10 aufweist. Es kann vorteilhaft sein, auch die folgenden Zy­linkerköpfe mit einer oder mehreren Kühlrippen zu ver­sehen, die in Längsrichtung der Zylinderkopfreihe ausge­richtet sind.In the exemplary embodiment shown, a cylinder head row is shown as a preferred embodiment, in which only the first cylinder head 1a has some cooling fins 8, 9, 10 aligned in the flow direction of the incoming cooling air. It may be advantageous to also provide the following cylinder heads with one or more cooling fins which are aligned in the longitudinal direction of the row of cylinder heads.

Die Kühlrippen 8,9,10 sind gemäß Fig. 1 getrennt von dem quer zur Längsmittelachse 14 liegenden Kühlrippen 20 ange­ordnet. Diese Trennung kann so vorgesehen sein, daß eine Art Kanal zwischen den in Längsrichtung und den in Quer­richtung ausgerichteten Rippen geibldet ist.1, the cooling fins 8, 9, 10 are arranged separately from the cooling fins 20 lying transversely to the longitudinal center axis 14. This separation can be provided in such a way that a type of channel is formed between the ribs oriented in the longitudinal direction and the ribs oriented in the transverse direction.

Es kann zur widerstandsarmen Kühlluftumlenkung vorteilhaft sein, einige oder alle in Längsrichtung der Zylinderreihe ausgerichteten Kühlrippen 8.1, 9.1, 10.1 so auszubilden, daß sie jeweils in eine quergestellte Kühlrippe 20.1 über­gehen (Fig. 3 und 4). Die Übergänge sind dabei mit großen Umlenkradien R ausgebildet, die zur widerstandsarmen Luft­umlenkung beitragen. In Fig. 4 ist eine Ausbildung ge­zeigt, bei der der Übergang aus einem geraden Rippenteil­stücke 30 gebildet ist, das mit entsprechend gewählten Übergangsradien an die parallel zur Längsmittelachse 14 liegende Kühlrippe 8.1 bzw. 9.1 bzw. 10.1 und die zugeord­nete, rechtwinklig zur Längsmittelachse 14 liegende Kühl­rippe 20.1 anschließt. In dieser Ausführungsform sind die Kühlrippen 8.1, 9.1, 10.1 und 20.1 entsprechend der Längs­ erstreckung der Rippenteilstücke 30 kürzer ausgebildet. Die Rippenteilstücke 30 liegen bzw. unter einem Winkel von etwa 45° zur Längsmittelachse.For low-resistance cooling air deflection, it can be advantageous to design some or all of the cooling fins 8.1, 9.1, 10.1 aligned in the longitudinal direction of the cylinder row in such a way that they each merge into a transverse cooling fin 20.1 (FIGS. 3 and 4). The transitions are designed with large deflection radii R, which contribute to low-resistance air deflection. 4 shows a design in which the transition is formed from a straight fin sections 30, which, with appropriately selected transition radii, lie on the cooling fin 8.1 or 9.1 or 10.1 lying parallel to the longitudinal central axis 14 and the associated one lying at right angles to the longitudinal central axis 14 Cooling fin 20.1 connects. In this embodiment, the cooling fins 8.1, 9.1, 10.1 and 20.1 correspond to the longitudinal Extension of the rib sections 30 is shorter. The rib sections 30 lie or at an angle of approximately 45 ° to the longitudinal central axis.

Die vorderste, dem Gebläse 4 benachbarte, quergestellte Kühlrippe 11 des Zylinderkopfes 1a ist in Draufsicht L-förmig ausgebildet, wobei ihr kleinerer Schenkel 11a in der Ebene 14a (Fig. 2) der Längsmittelachse 14 der Zylin­derreihe 5 liegt.The foremost, transversely positioned cooling fin 11 of the cylinder head 1 a, which is adjacent to the blower 4, is L-shaped in plan view, its smaller leg 11 a lying in the plane 14 a (FIG. 2) of the longitudinal central axis 14 of the cylinder bank 5.

Sowohl die quergestellten Kühlrippen 20 wie die in Längs­richtung ausgerichteten Kühlrippen 8,9,10 und 11a sind als tragende Elemente zur Abstützung des Brennraumbodens 22 gegen den Ventil- oder/und Nockenwellentrog 13 ausgebil­det.Both the transverse cooling fins 20 and the longitudinally oriented cooling fins 8, 9, 10 and 11a are designed as load-bearing elements for supporting the combustion chamber floor 22 against the valve or / and camshaft trough 13.

Claims (12)

1. Luftgekühlte Brennkraftmaschine mit mehreren in ei­ner Reihe angeordneten Zylindern (1,2,3) sowie einem im Bereich des ersten Zylinders angeordneten Gebläse (4), das einen in Längsrichtung der Zylinderreihe (5) gerichteten Kühlluftstrom (K) erzeugt, der mittels einer Luftführung (7) umgelenkt und weitgehend quer durch die Zylinderreihe (5) geführt ist,
dadurch gekennzeichnet, daß das Gebläse (4) derart benach­bart zum ersten Zylinder (1) angeordnet ist, daß ein Teil seines Kühlluftstroms (K) in Längsrichtung der Zylinder­reihe (5) auf den ersten Zylinder (1) auftrifft und daß zumindest einige Kühlrippen (8,9,10) des Zylinderkopfes (1a) zumindest des ersten Zylinders (1) etwa in Strömungs­richtung des Kühlluftstroms (K) ausgerichtet sind.1. Air-cooled internal combustion engine with a plurality of cylinders (1, 2, 3) arranged in a row and a blower (4) arranged in the region of the first cylinder, which generates a cooling air flow (K) directed in the longitudinal direction of the row of cylinders (5), which by means of a Air duct (7) is deflected and largely guided across the row of cylinders (5),
characterized in that the fan (4) is arranged adjacent to the first cylinder (1) in such a way that part of its cooling air flow (K) strikes the first cylinder (1) in the longitudinal direction of the row of cylinders (5) and that at least some cooling fins (8 , 9, 10) of the cylinder head (1a) of at least the first cylinder (1) are oriented approximately in the flow direction of the cooling air flow (K). 2. Brennkraftmaschine nach Anspruch 1,
dadurch gekennzeichnet, daß die Kühlrippen (8,9,10) etwa parallel zur Längsmittelachse (14) der Zylinderreihe (5) ausgerichtet sind.2. Internal combustion engine according to claim 1,
characterized in that the cooling fins (8, 9, 10) are aligned approximately parallel to the longitudinal central axis (14) of the row of cylinders (5). 3. Brennkraftmaschine nach Anspruch 1 mit einem Axial­gebläse (4),
dadurch gekennzeichnet, daß sich der Querschnitt (12) des Axialgebläses (4) teilweise mit dem ersten Zylinder (1) der Zylinderreihe (5) überdeckt (Fig. 2).3. Internal combustion engine according to claim 1 with an axial fan (4),
characterized in that the cross-section (12) of the axial fan (4) partially overlaps with the first cylinder (1) of the row of cylinders (5) (Fig. 2). 4. Brennkraftmaschine nach einem der Ansprüche 1 bis 3, mit einem Axialgebläse (4), dessen Längsmittelachse (15) parallel zur Längsmittelachse (14) der Zylinderreihe (5) liegt,
dadurch gekennzeichnet, daß eine Mantellinie (16) der äußeren Gehäusemantelfläche (17) des Axialgebläses (4) gleichachsig zur Längsmittelachse (14) der Zylinderreihe (5) liegt.4. Internal combustion engine according to one of claims 1 to 3, with an axial fan (4) whose longitudinal central axis (15) is parallel to the longitudinal central axis (14) of the row of cylinders (5),
characterized in that a surface line (16) of the outer housing surface (17) of the axial fan (4) lies coaxially with the longitudinal center axis (14) of the row of cylinders (5). 5. Brennkraftmaschine nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß die in Strömungsrichtung des Kühlluftstroms (K) ausgerichteten Kühlrippen (8,9,10) etwa auf einer Geraden (19) enden, die mit der Längsmittelachse (14) einen zum Gebläse (4) offenen, stumpfen Winkel (18) bildet.5. Internal combustion engine according to one of claims 1 to 4,
characterized in that the cooling fins (8, 9, 10) oriented in the flow direction of the cooling air flow (K) end approximately on a straight line (19) which, with the longitudinal central axis (14), forms an obtuse angle (18) open to the blower (4) forms. 6. Brennkraftmaschine nach Anspruch 5,
dadurch gekennzeichnet, daß die der Kühlluftführung (7) benachbarte, in Strömungsrichtung der einströmenden Kühl­luft (K) ausgerichtete Kühlrippe (8) die längste Ersteckung hat.6. Internal combustion engine according to claim 5,
characterized in that the cooling rib (8) adjacent to the cooling air guide (7) and oriented in the flow direction of the incoming cooling air (K) has the longest extension. 7. Brennkraftmaschine nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß die vorderste quer zur Zylin­derkopfreihe (5) liegende Kühlrippe (11) in Draufsicht L-förmig ausgebildet und mit ihrem kleineren Schenkel (11a) in der Längsmittelebene (14a) (Fig. 2) der Längs­mittelachse (15) der Zylinderreihe (5) liegt.7. Internal combustion engine according to one of claims 1 to 6,
characterized in that the foremost cooling fin (11) lying transversely to the cylinder head row (5) is L-shaped in plan view and with its smaller leg (11a) in the longitudinal center plane (14a) (Fig. 2) of the longitudinal center axis (15) of the row of cylinders ( 5) lies. 8. Brennkraftmaschine nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß zumindest einige der in Strö­mungsrichtung des Kühlluftstroms (K) ausgerichteten Kühl­rippen (8,9,10 bzw. 8.1, 9.1, 10.1) in die quer zur Längs­mittelachse (14) liegenden Rippen (20.1) übergehen, wobei die Übergänge zur widerstandsarmen Luftumlenkung ent­sprechend große Umlenkradien aufweisen.8. Internal combustion engine according to one of claims 1 to 6,
characterized in that at least some of the cooling fins (8, 9, 10, 8.1, 9.1, 10.1) oriented in the flow direction of the cooling air flow (K) merge into the fins (20.1) lying transversely to the longitudinal central axis (14), the transitions to the low-resistance Air deflection have correspondingly large deflection radii. 9. Brennkraftmachine nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß zumindest einige der quer zur Längsmittelachse (14) der Zylinderreihe (5) angeordneten Kühlrippen (20) getrennt von den in Längsrichtung der Längsmittelachse (14) ausgerichteten Kühlrippen (8,9,10) angeordnet sind.9. Internal combustion engine according to one of claims 1 to 6,
characterized in that at least some of the cooling fins (20) arranged transversely to the longitudinal central axis (14) of the row of cylinders (5) are arranged separately from the cooling fins (8,9,10) oriented in the longitudinal direction of the longitudinal central axis (14). 10. Brennkraftmaschine nach einem der Ansprüche 1 bis 9,
dadurch gekennzeichnet, daß ausschließlich einige Kühl­rippen(8,9,10) des ersten Zylinderkopfes (1a) in Strömungs­richtung des einströmenden Kühlluftstroms (K) ausgerichtet sind.10. Internal combustion engine according to one of claims 1 to 9,
characterized in that only a few cooling fins (8, 9, 10) of the first cylinder head (1a) are oriented in the direction of flow of the incoming cooling air flow (K). 11. Brennkraftmaschine nach Anspruch 8,
dadurch gekennzeichnet, daß alle in Strömungsrichtung des Kühlluftstroms (K) ausgerichtete Rippen (8.1,9.1,10.1) mit je einer quer zur Längsmittelachse (14) liegenden Rippe (20) verbunden sind.11. Internal combustion engine according to claim 8,
characterized in that all the ribs (8.1,9.1,10.1) aligned in the flow direction of the cooling air flow (K) are each connected to a rib (20) lying transversely to the longitudinal central axis (14). 12. Brennkraftmaschine nach Anpruch 8 oder 11,
dadurch gekennzeichnet, daß jede zweite quer zur Längsmit­telachse (14) liegende Rippe (20) mit einer in Strömungs­richtung des Kühlluftstroms (K) ausgerichteten Rippe (8.1, 9.1, 10.1) verbunden ist.12. Internal combustion engine according to claim 8 or 11,
characterized in that every second rib (20) lying transversely to the longitudinal central axis (14) is connected to a rib (8.1, 9.1, 10.1) oriented in the direction of flow of the cooling air flow (K).
EP86115779A 1985-11-15 1986-11-13 Cooling air guiding device for an air cooled internal-combustion engine Expired - Lifetime EP0222402B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86115779T ATE50828T1 (en) 1985-11-15 1986-11-13 COOLING AIR GUIDANCE IN AN AIR-COOLED INTERNAL ENGINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853540489 DE3540489A1 (en) 1985-11-15 1985-11-15 COOLING AIR GUIDE IN AN AIR COOLED INTERNAL COMBUSTION ENGINE
DE3540489 1985-11-15

Publications (3)

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EP0222402A2 true EP0222402A2 (en) 1987-05-20
EP0222402A3 EP0222402A3 (en) 1988-07-27
EP0222402B1 EP0222402B1 (en) 1990-03-07

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ID=6286031

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Application Number Title Priority Date Filing Date
EP86115779A Expired - Lifetime EP0222402B1 (en) 1985-11-15 1986-11-13 Cooling air guiding device for an air cooled internal-combustion engine

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US (1) US4747374A (en)
EP (1) EP0222402B1 (en)
JP (1) JPS62135608A (en)
AT (1) ATE50828T1 (en)
DE (2) DE3540489A1 (en)
ES (1) ES2014223B3 (en)

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Publication number Priority date Publication date Assignee Title
WO2009010218A1 (en) * 2007-07-16 2009-01-22 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Y-shaped cooling fin arrangement

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US7179402B2 (en) * 2004-02-02 2007-02-20 General Electric Company Phosphors containing phosphate and/or borate of metals of group IIIA, group IVA, and lanthanide series, and light sources incorporating the same

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DE3540488A1 (en) * 1985-11-15 1987-05-21 Kloeckner Humboldt Deutz Ag Cooling air duct in an air-cooled internal combustion engine

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DE880823C (en) * 1949-11-24 1953-06-25 Schweizerische Lokomotiv Air-cooled internal combustion engine
DE3540488A1 (en) * 1985-11-15 1987-05-21 Kloeckner Humboldt Deutz Ag Cooling air duct in an air-cooled internal combustion engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009010218A1 (en) * 2007-07-16 2009-01-22 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Y-shaped cooling fin arrangement

Also Published As

Publication number Publication date
EP0222402B1 (en) 1990-03-07
ATE50828T1 (en) 1990-03-15
DE3540489A1 (en) 1987-05-21
ES2014223B3 (en) 1990-07-01
US4747374A (en) 1988-05-31
EP0222402A3 (en) 1988-07-27
DE3669345D1 (en) 1990-04-12
JPS62135608A (en) 1987-06-18

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