EP0249686A2 - Air-cooled multi-cylinder internal-combustion engine - Google Patents

Air-cooled multi-cylinder internal-combustion engine Download PDF

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Publication number
EP0249686A2
EP0249686A2 EP87103878A EP87103878A EP0249686A2 EP 0249686 A2 EP0249686 A2 EP 0249686A2 EP 87103878 A EP87103878 A EP 87103878A EP 87103878 A EP87103878 A EP 87103878A EP 0249686 A2 EP0249686 A2 EP 0249686A2
Authority
EP
European Patent Office
Prior art keywords
cylinders
combustion engine
internal combustion
engine according
deflecting part
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
EP87103878A
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German (de)
French (fr)
Other versions
EP0249686B1 (en
EP0249686A3 (en
Inventor
Karl Gregotsch
Walter Dipl.-Ing. Mittermeier
Gerhard Dipl.-Ing. Ziegler
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Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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Publication date
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Application filed by Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP0249686A2 publication Critical patent/EP0249686A2/en
Publication of EP0249686A3 publication Critical patent/EP0249686A3/en
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Classifications

    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/28—Cylinder heads having cooling means for air cooling
    • F02F1/30—Finned cylinder heads
    • F02F1/34—Finned cylinder heads with means for directing or distributing cooling medium 

Definitions

  • the invention relates to an air-cooled multi-cylinder internal combustion engine according to the preamble of claim 1.
  • Such an internal combustion engine is known from DE-AS 1 205 772.
  • the cooling air flowing in transverse to the cylinders flows along the broad side of the transverse ribs and is deflected on the rear cooling air outflow side of the cylinders by columns which are designed to be streamlined.
  • baffles are attached to the pillars, the type of fastening of which is not specified. Such baffles are usually screwed on and cause undesirable noise emissions.
  • the object of the invention is to provide an air guiding device which can be produced and assembled at low cost and does not constitute an additional source of noise.
  • FIGS. 1 and 2 three individually cast cylinders 2, 3, 4 are arranged in a row next to one another in a crankcase 1 of an internal combustion engine and together with the cylinder heads 6 with the crankcase 1 placed on the cylinders 2, 3, 4 by means of expansion screws 5 screwed.
  • the cylinders 2, 3, 4 are provided all around with ribs 7 extending transversely to their longitudinal axis, between which cooling air is blown through.
  • a deflecting part 8 covering all cylinders, which is cast in one piece from light metal and is attached to the crankcase at its three fastening eyes 9 located centrally to the cylinders 2, 3, 4 and screwed to it.
  • the deflection part 8 is double-walled.
  • the fastening eyes 9 are located in the center of the air outlet openings 10, which are arranged in the area of the center planes 2 ', 3', 4 'of the cylinders, run radially to the cylinders and extend over their entire height.
  • the deflecting part In the area between the cylinders 2, 3 and 3, 4, the deflecting part has V-shaped bends 11 pointing towards the cylinders 2, 3, 4, at which the cooling air flowing between the cylinders is deflected by 90 ° and led to the air outlet openings 10 becomes.
  • This deflecting part 12 also serves as a knocking bridge in addition to the air guidance, in that it forwards the noise coming from the cylinders caused by knocking combustion to a knocking sensor 15 which is screwed onto the deflecting part 12 approximately in the middle of its longitudinal extent.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

Eine Zylinderreihe einer luftgekühlten Mehrzylinder-Brennkraftmaschine wird quer zu den Zylindern mit Kühlluft durchströmt. Als Luftleitvorrichtung ist an der Kühlluftaustrittsseite ein einstückiges, aus Leichtmetall oder Kunststoff gefertigtes, alle Zylinder abdeckendes Umlenkteil angeordnet.A row of cylinders of an air-cooled multi-cylinder internal combustion engine is flowed through with cooling air transversely to the cylinders. A one-piece deflecting part made of light metal or plastic and covering all cylinders is arranged as an air guiding device on the cooling air outlet side.

Description

Die Erfindung betrifft eine luftgekühlte Mehrzylinder-Brennkraftmaschine nach dem Oberbegriff des Anspruchs 1.The invention relates to an air-cooled multi-cylinder internal combustion engine according to the preamble of claim 1.

Eine derartige Brennkraftmaschine ist aus DE-AS 1 205 772 bekannt. Die quer zu den Zylindern zuströmende Kühlluft strömt entlang der Breitseite der Querrippen und wird an der rückwärtigen Kühlluftabströmseite der Zylinder durch strömungsgünstig gestaltete Säulen umgelenkt. Zusätzlich sind an den Säulen Leitbleche angebracht, über deren Befestigungsart keine Angaben gemacht sind. Üblicherweise werden solche Leitbleche angeschraubt und verursachen eine unerwünschte Geräuschemission.Such an internal combustion engine is known from DE-AS 1 205 772. The cooling air flowing in transverse to the cylinders flows along the broad side of the transverse ribs and is deflected on the rear cooling air outflow side of the cylinders by columns which are designed to be streamlined. In addition, baffles are attached to the pillars, the type of fastening of which is not specified. Such baffles are usually screwed on and cause undesirable noise emissions.

Die Aufgabe der Erfindung besteht darin, eine Luftleitvorrichtung zu schaffen, die mit geringen Kosten herstellbar und montierbar ist und keine zusätzliche Geräuschquelle darstellt.The object of the invention is to provide an air guiding device which can be produced and assembled at low cost and does not constitute an additional source of noise.

Zur Lösung dieser Aufgabe dient als Luftleitvorrichtung ein einstückiges, alle Zylinder an ihrer Kühlluftabströmseite abdeckendes Umlenkteil, das aus Leichtmetall gegossen oder aus Kunststoff gespritzt sein kann. Zur Erhöhung der Formsteifigkeit ist es doppelwandig gestaltet. Dieses Umlenkteil ist entweder mit dem Kurbelgehäuse oder den Zylindern verschraubt. Es kann im letzteren Falle zugleich als Klopfbrücke verwendet werden, indem es die Klopfgeräusche aller mit ihm verbundenen Zylinder an einen mittig an ihm angeschraubten Klopfsensor weiterleitet. Wenn das Umlenkteil aus einem Werkstoff gefertigt ist, der den gleichen Wärmeausdehnungskoeffizienten hat wie das Kurbelgehäuse, folgt es bei Temperaturänderungen dessen Längendehnung, so daß das Umlenkteil starr an die im Kurbelgehäuse befestigten Zylinder angeschraubt sein kann. Ansonsten kann auch eine ausgleichende Schraubenverbindung gewählt werden, die eine unterschiedliche Längenausdehnung von Umlenkteil und Kurbelgehäuse ermöglicht.To achieve this object, a one-piece deflecting part, which covers all cylinders on their cooling air outflow side, serves as an air guiding device, which can be cast from light metal or injection molded from plastic. It is designed with double walls to increase its rigidity. This deflecting part is screwed to either the crankcase or the cylinders. In the latter case, it can also be used as a knocking bridge by forwarding the knocking noises of all cylinders connected to it to a knocking sensor screwed to it in the center. If the deflecting part is made of a material that has the same coefficient of thermal expansion as the crankcase, it follows its longitudinal expansion when the temperature changes, so that the deflecting part can be rigidly screwed to the cylinders fastened in the crankcase. Otherwise, a compensating screw connection can also be selected, which enables different lengths of the deflection part and crankcase.

Zwei Ausführungsformen der Erfindung sind in der Zeichnung dargestellt und werden nachstehend erläutert.Two embodiments of the invention are shown in the drawing and are explained below.

Es zeigt

  • Fig. 1 Querschnitt durch eine Zylinderreihe einer luftgekühlten Sechszylinder-Brennkraftmaschine,
  • Fig. 2 Längsschnitt durch einen Zylinder mit Umlenkteil nach der Linie II-II der Fig. 1,
  • Fig. 3 Seitenansicht eines Umlenkteils mit Klopfsensor,
  • Fig. 4 Querschnitt durch eine Zylinderreihe nach Linie IV-IV der Fig. 3,
  • Fig. 5 Schnitt durch eine Linie V-V der Fig. 2 mit Längsschnitt durch einen Zylinder.
It shows
  • 1 cross section through a row of cylinders of an air-cooled six-cylinder internal combustion engine,
  • 2 shows a longitudinal section through a cylinder with a deflecting part along the line II-II of FIG. 1,
  • 3 side view of a deflection part with knock sensor,
  • 4 cross section through a row of cylinders according to line IV-IV of FIG. 3,
  • Fig. 5 section through a line VV of Fig. 2 with a longitudinal section through a cylinder.

Nach Fig. 1 und Fig. 2 sind in einem Kurbelgehäuse 1 einer Brennkraftmaschine drei einzeln gegossene Zylinder 2, 3, 4 in Reihe nebeneinander angeordnet und durch Dehnschrauben 5 gemeinsam mit den auf die Zylinder 2, 3, 4 aufgesetzten Zylinderköpfen 6 mit dem Kurbelgehäuse 1 verschraubt. Die Zylinder 2, 3, 4 sind außen ringsum mit quer zu ihrer Längsachse verlaufenden Rippen 7 versehen, zwischen denen Kühlluft hindurchgeblasen wird. An der Kühlluftabströmseite der Zylinder ist ein alle Zylinder abdeckendes Umlenkteil 8 angeordnet, das einstückig aus Leichtmetall gegossen und an seinen drei mittig zu den Zylindern 2, 3, 4 liegenden Befestigungsaugen 9 auf das Kurbelgehäuse aufgesetzt und mit ihm verschraubt ist. Zur Erhöhung der Formsteifigkeit ist das Umlenkteil 8 doppelwandig ausgeführt. Die Befestigungsaugen 9 liegen mittig zu den Luftaustrittsöffnungen 10, die im Bereich der Mittenebenen 2', 3', 4' der Zylinder angeordnet sind, radial zu den Zylindern verlaufen und sich über deren ganze Höhe erstrecken. Im Bereich zwischen den Zylindern 2, 3 und 3, 4 weist das Umlenkteil V-förmige, zu den Zylindern 2, 3, 4 hinweisende Einknickungen 11 auf, an denen die zwischen den Zylindern durchströmende Kühlluft um 90 ° umgelenkt und zu den Luftaustrittsöffnungen 10 hingeführt wird.According to FIGS. 1 and 2, three individually cast cylinders 2, 3, 4 are arranged in a row next to one another in a crankcase 1 of an internal combustion engine and together with the cylinder heads 6 with the crankcase 1 placed on the cylinders 2, 3, 4 by means of expansion screws 5 screwed. The cylinders 2, 3, 4 are provided all around with ribs 7 extending transversely to their longitudinal axis, between which cooling air is blown through. Arranged on the cooling air outflow side of the cylinders is a deflecting part 8 covering all cylinders, which is cast in one piece from light metal and is attached to the crankcase at its three fastening eyes 9 located centrally to the cylinders 2, 3, 4 and screwed to it. To increase the rigidity, the deflection part 8 is double-walled. The fastening eyes 9 are located in the center of the air outlet openings 10, which are arranged in the area of the center planes 2 ', 3', 4 'of the cylinders, run radially to the cylinders and extend over their entire height. In the area between the cylinders 2, 3 and 3, 4, the deflecting part has V-shaped bends 11 pointing towards the cylinders 2, 3, 4, at which the cooling air flowing between the cylinders is deflected by 90 ° and led to the air outlet openings 10 becomes.

Bei einer Ausführungsform der Erfindung gemäß Fig. 3, 4 und 5 unterscheidet sich das Umlenkteil 12 dadurch vom Umlenkteil 9, daß es radial zu den Zylindern verlaufende Augen 13 aufweist, mit denen es auf entsprechende Augen 14 der Zylinder 2, 3, 4 aufgesetzt und mit ihnen verschraubt ist.3, 4 and 5, the deflecting part 12 differs from the deflecting part 9 in that it has radially extending eyes 13 with which it is placed on corresponding eyes 14 of the cylinders 2, 3, 4 and screwed to them.

Dieses Umlenkteil 12 dient neben der Luftführung zugleich als Klopfbrücke, indem es die aus den Zylindern kommenden, durch klopfende Verbrennung verursachten Geräusche zu einem Klopfsensor 15 weiterleitet, der am Umlenkteil 12 etwa mittig seiner Längserstreckung angeschraubt ist.This deflecting part 12 also serves as a knocking bridge in addition to the air guidance, in that it forwards the noise coming from the cylinders caused by knocking combustion to a knocking sensor 15 which is screwed onto the deflecting part 12 approximately in the middle of its longitudinal extent.

Claims (9)

1. Luftgekühlte Mehrzylinder-Brennkraftmaschine, deren in Reihe angeordnete, zwischen den zugehörigen Zylinderköpfen und dem Kurbelgehäuse eingespannte Zylinder einzeln gegossen sind und zur Kühlung außen mit querverlaufenden Rippen versehen sind, die in Querrichtung der Zylinder von Kühlluft durchströmt sind, wobei an der Kühlluftabströmseite der Zylinder eine Luftleitvorrichtung angeordnet ist, dadurch gekennzeichnet, daß die Luftleitvorrichtung als einstückiges, alle Zylinder (2, 3, 4) abdeckendes Umlenkteil (8, 12) ausgebildet ist.1.Air-cooled multi-cylinder internal combustion engine, the cylinders of which are arranged in series and which are clamped individually between the associated cylinder heads and the crankcase and are provided for cooling on the outside with transverse ribs through which cooling air flows in the transverse direction of the cylinders, with the cylinders on the cooling air outflow side An air guiding device is arranged, characterized in that the air guiding device is designed as a one-piece deflecting part (8, 12) covering all cylinders (2, 3, 4). 2. Brennkraftmaschine nach Anspruch 1, dadurch gekennzeichnet, daß das Umlenkteil (8) auf das Kurbelgehäuse (1) aufgesetzt und mit ihm verschraubt ist.2. Internal combustion engine according to claim 1, characterized in that the deflecting part (8) on the crankcase (1) is placed and screwed to it. 3. Brennkraftmaschine nach Anspruch 2, dadurch gekennzeichnet, daß das Umlenkteil (8) im Bereich der Mittelebenen (2', 3', 4') der Zylinder (2, 3, 4) in deren Längsrichtung verlaufende Befestigungsaugen (9) aufweist.3. Internal combustion engine according to claim 2, characterized in that the deflecting part (8) in the region of the central planes (2 ', 3', 4 ') of the cylinders (2, 3, 4) in the longitudinal direction of the fastening eyes (9). 4. Brennkraftmaschine nach Anspruch 1, dadurch gekennzeichnet, daß das Umlenkteil (12) auf die Zylinder (2, 3, 4) aufgesetzt und mit ihnen verschraubt ist.4. Internal combustion engine according to claim 1, characterized in that the deflecting part (12) on the cylinder (2, 3, 4) is placed and screwed to them. 5. Brennkraftmaschine nach Anspruch 4, dadurch gekennzeichnet, daß an allen Zylindern (2, 3, 4) im Bereich ihrer Mittelebenen (2', 3', 4') radial vorstehende Augen (14) angegossen sind, an denen das Umlenkteil (12) angeschraubt ist.5. Internal combustion engine according to claim 4, characterized in that on all cylinders (2, 3, 4) in the region of their central planes (2 ', 3', 4 ') radially projecting eyes (14) are cast, on which the deflection part (12th ) is screwed on. 6. Brennkraftmaschine nach Anspruch 5, dadurch gekennzeichnet, daß auf das Umlenkteil (12) etwa mittig zu seiner Längserstreckung ein Klopfsensor (15) aufgesetzt und mit ihm verschraubt ist.6. Internal combustion engine according to claim 5, characterized in that a knock sensor (15) is placed on the deflection part (12) approximately centrally to its longitudinal extent and screwed to it. 7. Brennkraftmaschine nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Umlenkteil (8, 12) aus Leichtmetall gegossen oder aus Kunststoff gefertigt ist.7. Internal combustion engine according to one of claims 1 to 6, characterized in that the deflecting part (8, 12) is cast from light metal or made from plastic. 8. Brennkraftmaschine nach Anspruch 1 oder 7, dadurch gekennzeichnet, daß das Umlenkteil (8, 12) doppelwandig ausgeführt ist.8. Internal combustion engine according to claim 1 or 7, characterized in that the deflecting part (8, 12) is double-walled. 9. Brennkraftmaschine nach Anspruch 1 oder 7, dadurch gekennzeichnet, daß das Umlenkteil (8, 12) im Bereich zwischen den Zylindern (2, 3, 4) zu ihnen hin gerichtete Einknickungen (11) und im Bereich der Mittenebenen (2', 3', 4') der Zylinder (2, 3, 4) Luftaustrittsöffnungen (10) aufweist.9. Internal combustion engine according to claim 1 or 7, characterized in that the deflecting part (8, 12) in the region between the cylinders (2, 3, 4) directed towards them bends (11) and in the region of the center planes (2 ', 3rd ', 4') of the cylinders (2, 3, 4) has air outlet openings (10).
EP87103878A 1986-05-16 1987-03-17 Air-cooled multi-cylinder internal-combustion engine Expired - Lifetime EP0249686B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3616636 1986-05-16
DE19863616636 DE3616636A1 (en) 1986-05-16 1986-05-16 AIR-COOLED MULTI-CYLINDER INTERNAL COMBUSTION ENGINE

Publications (3)

Publication Number Publication Date
EP0249686A2 true EP0249686A2 (en) 1987-12-23
EP0249686A3 EP0249686A3 (en) 1988-11-30
EP0249686B1 EP0249686B1 (en) 1991-07-17

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ID=6301029

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87103878A Expired - Lifetime EP0249686B1 (en) 1986-05-16 1987-03-17 Air-cooled multi-cylinder internal-combustion engine

Country Status (5)

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US (1) US4779588A (en)
EP (1) EP0249686B1 (en)
JP (1) JPS62271921A (en)
DE (2) DE3616636A1 (en)
ES (1) ES2025079B3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT501201B1 (en) * 2005-01-13 2006-11-15 Avl List Gmbh Air-cooled internal combustion engine has cylinder, ventilator housing which partially surrounds cylinder housing whereby means is provided for deviating semi-axial flow of cooling flow emerging from blower wheel

Families Citing this family (8)

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Publication number Priority date Publication date Assignee Title
JPH088282Y2 (en) * 1988-04-06 1996-03-06 日産自動車株式会社 V type cylinder block for internal combustion engine
US5967326A (en) * 1998-07-22 1999-10-19 Tessler & Weiss/Premesco, Inc. Tray for displaying a plurality of jewelry items and information relating to the jewelry items
US7918195B2 (en) * 2007-02-09 2011-04-05 George McCall, III Air-cooled engine heat extractor
JP2013024100A (en) * 2011-07-20 2013-02-04 Yamaha Motor Co Ltd Internal combustion engine and saddle-type vehicle equipped with the same
JP2013024101A (en) * 2011-07-20 2013-02-04 Yamaha Motor Co Ltd Internal combustion engine and straddle-type vehicle equipped with the same
JP2013024099A (en) * 2011-07-20 2013-02-04 Yamaha Motor Co Ltd Internal combustion engine and straddle-type vehicle equipped with the same
JP2016011587A (en) * 2014-06-27 2016-01-21 本田技研工業株式会社 Knock sensor mounting structure in unit swing engine
WO2021224903A1 (en) * 2020-05-03 2021-11-11 Yaacobi Amnon Method and system for controlling the temperature of an engine

Citations (8)

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Publication number Priority date Publication date Assignee Title
GB163140A (en) * 1920-02-21 1921-05-19 William Tranton Sidebottom Improvements connected with air cooled cylinders of internal combustion engines
GB475887A (en) * 1936-05-28 1937-11-29 Arthur John Rowledge Improvements in cooling means for air cooled cylinders of internal combustion engines
US2424416A (en) * 1944-01-06 1947-07-22 Fairchild Engine & Airplane Engine cooling system
GB971560A (en) * 1961-06-09 1964-09-30 Linde Eismasch Ag Improvements in internal combustion engines
DE1205772B (en) * 1960-03-10 1965-11-25 Kloeckner Humboldt Deutz Ag Air-cooled internal combustion engine
GB2052388A (en) * 1979-06-02 1981-01-28 Nissan Motor Noise reducing cover for an internal combustion engine
EP0079042A1 (en) * 1981-11-05 1983-05-18 Nissan Motor Co., Ltd. Internal combustion engine with engine knock sensor
US4452185A (en) * 1983-02-09 1984-06-05 The Toro Company Engine housing

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FR1349691A (en) * 1963-02-28 1964-01-17 Lindes Eismaschinen Ag Air-cooled internal combustion engine
US4047508A (en) * 1975-12-08 1977-09-13 Avco Corporation Cooling air distribution system for reciprocating aircraft engines
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Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB163140A (en) * 1920-02-21 1921-05-19 William Tranton Sidebottom Improvements connected with air cooled cylinders of internal combustion engines
GB475887A (en) * 1936-05-28 1937-11-29 Arthur John Rowledge Improvements in cooling means for air cooled cylinders of internal combustion engines
US2424416A (en) * 1944-01-06 1947-07-22 Fairchild Engine & Airplane Engine cooling system
DE1205772B (en) * 1960-03-10 1965-11-25 Kloeckner Humboldt Deutz Ag Air-cooled internal combustion engine
GB971560A (en) * 1961-06-09 1964-09-30 Linde Eismasch Ag Improvements in internal combustion engines
GB2052388A (en) * 1979-06-02 1981-01-28 Nissan Motor Noise reducing cover for an internal combustion engine
EP0079042A1 (en) * 1981-11-05 1983-05-18 Nissan Motor Co., Ltd. Internal combustion engine with engine knock sensor
US4452185A (en) * 1983-02-09 1984-06-05 The Toro Company Engine housing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT501201B1 (en) * 2005-01-13 2006-11-15 Avl List Gmbh Air-cooled internal combustion engine has cylinder, ventilator housing which partially surrounds cylinder housing whereby means is provided for deviating semi-axial flow of cooling flow emerging from blower wheel

Also Published As

Publication number Publication date
EP0249686B1 (en) 1991-07-17
EP0249686A3 (en) 1988-11-30
ES2025079B3 (en) 1992-03-16
JPS62271921A (en) 1987-11-26
DE3616636A1 (en) 1987-11-19
DE3771396D1 (en) 1991-08-22
US4779588A (en) 1988-10-25

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