EP0878618B1 - Water cooled cylinder block - Google Patents

Water cooled cylinder block Download PDF

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Publication number
EP0878618B1
EP0878618B1 EP98107816A EP98107816A EP0878618B1 EP 0878618 B1 EP0878618 B1 EP 0878618B1 EP 98107816 A EP98107816 A EP 98107816A EP 98107816 A EP98107816 A EP 98107816A EP 0878618 B1 EP0878618 B1 EP 0878618B1
Authority
EP
European Patent Office
Prior art keywords
cooling water
cylinders
displacement body
cylinder block
cylindrical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98107816A
Other languages
German (de)
French (fr)
Other versions
EP0878618A2 (en
EP0878618A3 (en
Inventor
Jochen Dr. Betsch
Arnold Kaden
Georg Stumpp
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.)
Mercedes Benz Group AG
Original Assignee
DaimlerChrysler 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 DaimlerChrysler AG filed Critical DaimlerChrysler AG
Publication of EP0878618A2 publication Critical patent/EP0878618A2/en
Publication of EP0878618A3 publication Critical patent/EP0878618A3/en
Application granted granted Critical
Publication of EP0878618B1 publication Critical patent/EP0878618B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0002—Cylinder arrangements
    • F02F7/0007—Crankcases of engines with cylinders in line
    • 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 
    • F02F1/02—Cylinders; Cylinder heads  having cooling means
    • F02F1/10—Cylinders; Cylinder heads  having cooling means for liquid cooling
    • 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 
    • F02F1/02—Cylinders; Cylinder heads  having cooling means
    • F02F1/10—Cylinders; Cylinder heads  having cooling means for liquid cooling
    • F02F1/108—Siamese-type cylinders, i.e. cylinders cast together
    • 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
    • F02B2075/1804—Number of cylinders
    • F02B2075/1816—Number of cylinders four
    • 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 
    • F02F1/02—Cylinders; Cylinder heads  having cooling means
    • F02F1/10—Cylinders; Cylinder heads  having cooling means for liquid cooling
    • F02F2001/104—Cylinders; Cylinder heads  having cooling means for liquid cooling using an open deck, i.e. the water jacket is open at the block top face

Definitions

  • the invention relates to a liquid-cooled cylinder crankcase according to the preamble of claim 1.
  • a cylinder crankcase is known from DE 36 23 742 A1, in the case between the cylinder liners for the individual pistons and the cylinder crankcase a water space for the cooling water the internal combustion engine is provided. In the water room is an insert inserted from above, against the inside of the cylinder block.
  • the object of the invention is to provide a cylinder crankcase Generic type in which the cooling of the cylinder is optimized.
  • the displacer also causes one significant reduction in the amount of cooling water, which means a faster Warming up the engine with positive effects on pollutant emissions Friction power, driving comfort and the response behavior of the Heating is achieved and the water pump output is reduced can be, which has a positive impact on fuel consumption effect.
  • the amount of cooling water can be further reduced if the Shape of the displacer to the shape of the cooling water space is approximated so that essentially only the gap between the displacer and the cylinders or the cylinders containing cylinder block is flowed through by cooling water.
  • a spoiler can be arranged, which is directed towards the Cooling water inlet connector extends and the cooling water flow divided into two sub-streams through through openings on both sides of the spoiler along the cylinders or the Cylinder block on one side and on the other side of the Cylinder crankcase are directed.
  • the land areas between the cylinders particularly at risk. To ensure good cooling of these areas ensure the inner wall of the displacer extend to close to these areas so that the Cooling water flow is forced to paint these areas and dead water zones are avoided.
  • the displacement body should preferably have a low heat capacity have what through an appropriate material, e.g. Plastic, and / or can be achieved in that the displacement body is designed as a hollow body.
  • the cylinder crankcase 1 has outer walls 2 which are upper Form flange surface 3 for a cylinder head, not shown and enclose a cooling water space 4, which to the flange surface 3 is open so that the crankcase in die casting technology can be manufactured.
  • a cylinder block 5 summarized cylinder 6 arranged in the cooling water room 4 in the cooling water room 4 in the cooling water room 4 in the cooling water room 4 are closed.
  • the cylinder block 5 is in one piece with the housing 1 and lies at a distance from the outer walls 2.
  • In the Cooling water chamber 4 opens into a cooling water inlet connection 7.
  • a displacer 8 is inserted into the cooling water chamber 4, the shape of which approximates the shape of the cooling water chamber.
  • the inner wall 9 of the displacer 8 limits with the Outer surface 10 of the cylinder block 5 a relatively narrow Gap 11, which with the inlet connection 7 via openings 12 (Fig. 2) in the wall of the displacer 8 in connection stands.
  • a spoiler 13 formed which is in Direction extends to the inlet nozzle 7 and the cooling water flow divided into two sub-streams by that on each Openings 12 provided in the gap 11 on the side of the spoiler enter and one of which is a partial flow along the cylinder block 5 on one side and the other partial flow along the cylinder block 5 on the other side of the cylinder crankcase 1 flows through the gap 11.
  • the inner wall 9 of the displacer extends 8 at a relatively short distance from the outer surface 10 of the cylinder block 5 and, in particular, of the web areas 14 between adjacent cylinders 6, so that the cooling water is forced is along the outer wall 10 of the cylinder block 5 to flow and intensive cooling especially the critical web areas.

Landscapes

  • 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)

Description

Die Erfindung betrifft ein flüssigkeitsgekühltes Zylinderkurbelgehäuse entsprechend dem Oberbegriff des Anspruchs 1.The invention relates to a liquid-cooled cylinder crankcase according to the preamble of claim 1.

Aus der DE 36 23 742 A1 ist ein Zylinderkurbelgehäuse bekannt, bei dem zwischen Zylinderlaufbuchsen für die einzelnen Kolben und dem Zylinderkurbelgehäuse ein Wasserraum für das Kühlwasser der Brennkraftmaschine vorgesehen ist. In den Wasserraum ist von oben her ein Einsatz eingesetzt, der gegen die Innenseite des Zylinderblockes anliegt.A cylinder crankcase is known from DE 36 23 742 A1, in the case between the cylinder liners for the individual pistons and the cylinder crankcase a water space for the cooling water the internal combustion engine is provided. In the water room is an insert inserted from above, against the inside of the cylinder block.

Aus der DE 195 11 864 C ist ein Kurbelgehäuse bekannt, das in Druckgußtechnik gefertigt wird. Dabei ist das Volumen des Kühlwasserraumes durch die Anforderungen der Gußform festgelegt. Dieses Volumen kann deshalb nicht optimal für die Kühlung der Zylinder ausgelegt werden.From DE 195 11 864 C a crankcase is known, which in Die casting technology is manufactured. The volume of the cooling water room determined by the requirements of the mold. This volume can therefore not be optimal for cooling the Cylinder can be designed.

Aufgabe der Erfindung ist es, ein Zylinderkurbelgehäuse der gattungsgemäßen Art zu schaffen, bei dem die Kühlung der Zylinder optimiert ist.The object of the invention is to provide a cylinder crankcase Generic type in which the cooling of the cylinder is optimized.

Diese Aufgabe wird erfindungsgemäß durch die im Kennzeichen des Anspruchs 1 angegebenen Merkmale gelöst.This object is achieved by the in the characteristic of Features specified claim 1 solved.

Durch den in den Kühlwasserraum eingelegten Verdrängerkörper ergibt sich eine erzwungene Strömung entlang den Wänden der Zylinder und eine stark verbesserte Kühlung der besonders kritischen Stegbereiche zwischen benachbarten Zylindern. Damit wird eine gleichmäßige Kühlung erreicht, durch die die Klopfneigung verringert wird. Der Verdrängerkörper bewirkt überdies eine deutliche Reduzierung der Kühlwassermenge, wodurch ein schneller Warmlauf der Brennkraftmaschine mit positiven Auswirkungen auf die Schadstoffemissionen, die Reibleistung, den Fahrkomfort und das Ansprechverhalten der Heizung erreicht wird und die Wasserpumpenleistung reduziert werden kann, was sich positiv auf den Kraftstoffverbrauch auswirkt.Through the displacement body inserted in the cooling water chamber there is a forced flow along the walls of the cylinders and greatly improved cooling of the particularly critical Web areas between adjacent cylinders. So that will uniform cooling achieved by the knock tendency is reduced. The displacer also causes one significant reduction in the amount of cooling water, which means a faster Warming up the engine with positive effects on pollutant emissions Friction power, driving comfort and the response behavior of the Heating is achieved and the water pump output is reduced can be, which has a positive impact on fuel consumption effect.

Die Kühlwassermenge kann weiter verringert werden, wenn die Form des Verdrängerkörpers an die Form des Kühlwasserraumes angenähert ist, so daß im wesentlichen nur der Spalt zwischen dem Verdrängerkörper und den Zylindern bzw. dem die Zylinder enthaltenden Zylinderblock von Kühlwasser durchströmt wird.The amount of cooling water can be further reduced if the Shape of the displacer to the shape of the cooling water space is approximated so that essentially only the gap between the displacer and the cylinders or the cylinders containing cylinder block is flowed through by cooling water.

Um eine möglichst gleichmäßige Umströmung der Zylinder bzw. des Zylinderblocks zu erreichen, kann an den Verdrängerkörper ein Spoiler angeordnet sein, der sich in Richtung auf den Kühlwasser-Eintrittstutzen erstreckt und den Kühlwasserstrom in zwei Teilströme aufteilt, die durch Durchtrittsöffnungen auf beiden Seiten des Spoilers entlang den Zylindern bzw. dem Zylinderblock auf der einen und auf der anderen Seite des Zylinderkurbelgehäuses geleitet werden.To ensure that the flow around the cylinders or of the cylinder block can be reached on the displacer a spoiler can be arranged, which is directed towards the Cooling water inlet connector extends and the cooling water flow divided into two sub-streams through through openings on both sides of the spoiler along the cylinders or the Cylinder block on one side and on the other side of the Cylinder crankcase are directed.

Wie erwähnt, sind die Stegbereiche zwischen den Zylindern besonders gefährdet. Um eine gute Kühlung dieser Bereiche sicherzustellen, sollte sich die Innenwand des Verdrängerkörpers bis nahe an diese Bereiche erstrecken, so daß der Kühlwasserstrom gezwungen ist, diese Bereiche zu bestreichen und Totwasserzonen vermieden werden.As mentioned, the land areas between the cylinders particularly at risk. To ensure good cooling of these areas ensure the inner wall of the displacer extend to close to these areas so that the Cooling water flow is forced to paint these areas and dead water zones are avoided.

Vorzugsweise sollte der Verdrängerkörper eine geringe Wärmekapazität haben, was durch einen entsprechenden Werkstoff, z.B. Kunststoff, und/oder dadurch erreicht werden kann, daß der Verdrängerkörper als Hohlkörper ausgebildet ist.The displacement body should preferably have a low heat capacity have what through an appropriate material, e.g. Plastic, and / or can be achieved in that the displacement body is designed as a hollow body.

Ein Ausführungsbeispiel der Erfindung wird im folgenden unter Bezugnahme auf die Zeichnungen beschrieben. Es zeigt:

Fig. 1
einen horizontalen Längsschnitt eines Zylinderkurbelgehäuses,
Fig. 2
einen Teillängsschnitt im Bereich des KühlwasserEintrittstutzens in größerem Maßstab, und
Fig. 3
einen Schnitt entlang Linie 3-3 in Fig. 1.
An embodiment of the invention is described below with reference to the drawings. It shows:
Fig. 1
a horizontal longitudinal section of a cylinder crankcase,
Fig. 2
a partial longitudinal section in the area of the cooling water inlet connector on a larger scale, and
Fig. 3
a section along line 3-3 in Fig. 1st

Das Zylinderkurbelgehäuse 1 hat Außenwände 2, die eine obere Flanschfläche 3 für einen nicht gezeigten Zylinderkopf bilden und einen Kühlwasserraum 4 umschließen, der zur Flanschfläche 3 hin offen ist, so daß das Kurbelgehäuse in Druckgußtechnik gefertigt werden kann. In dem Kühlwasserraum 4 sind die zu einem Zylinderblock 5 zusammengefaßten Zylinder 6 angeordnet. Der Zylinderblock 5 ist mit dem Gehäuse 1 einstückig und liegt in einem Abstand von den Außenwänden 2. In den Kühlwasserraum 4 mündet ein Kühlwasser-Eintrittstutzen 7.The cylinder crankcase 1 has outer walls 2 which are upper Form flange surface 3 for a cylinder head, not shown and enclose a cooling water space 4, which to the flange surface 3 is open so that the crankcase in die casting technology can be manufactured. In the cooling water room 4 are closed a cylinder block 5 summarized cylinder 6 arranged. The cylinder block 5 is in one piece with the housing 1 and lies at a distance from the outer walls 2. In the Cooling water chamber 4 opens into a cooling water inlet connection 7.

In den Kühlwasserraum 4 ist ein Verdrängerkörper 8 eingelegt, dessen Form an die Form des Kühlwasserraumes angenähert ist. Die Innenwand 9 des Verdrängerkörpers 8 begrenzt mit der Außenfläche 10 des Zylinderblockes 5 einen relativ engen Spalt 11, der mit dem Eintrittstutzen 7 über Öffnungen 12 (Fig. 2) in der Wand des Verdrängerkörpers 8 in Verbindung steht. Um eine Verteilung des Kühlwasserstromes auf beide Seiten des von den Zylindern 6 gebildeten Zylinderblockes 5 zu erreichen, ist, wie aus Fig. 2 ersichtlich, an den Verdrängerkörper 8 ein Spoiler 13 angeformt, der sich in Richtung auf den Eintrittsstutzen 7 erstreckt und den Kühlwasserstrom in zwei Teilströme aufteilt, die durch die auf jeder Seite des Spoilers vorgesehenen Öffnungen 12 in den Spalt 11 eintreten und von denen der eine Teilstrom entlang dem Zylinderblock 5 auf der einen Seite und der andere Teilstrom entlang dem Zylinderblock 5 auf der anderen Seite des Zylinderkurbelgehäsues 1 durch den Spalt 11 strömt.A displacer 8 is inserted into the cooling water chamber 4, the shape of which approximates the shape of the cooling water chamber. The inner wall 9 of the displacer 8 limits with the Outer surface 10 of the cylinder block 5 a relatively narrow Gap 11, which with the inlet connection 7 via openings 12 (Fig. 2) in the wall of the displacer 8 in connection stands. To distribute the cooling water flow to both Sides of the cylinder block 5 formed by the cylinders 6 to achieve, as can be seen from Fig. 2, to the Displacer 8, a spoiler 13 formed, which is in Direction extends to the inlet nozzle 7 and the cooling water flow divided into two sub-streams by that on each Openings 12 provided in the gap 11 on the side of the spoiler enter and one of which is a partial flow along the cylinder block 5 on one side and the other partial flow along the cylinder block 5 on the other side of the cylinder crankcase 1 flows through the gap 11.

Wie in Fig. 1 gezeigt, verläuft die Innenwand 9 des Verdrängerkörpers 8 in relativ geringem Abstand von der Außenfläche 10 des Zylinderblockes 5 und vor allem von den Stegbereichen 14 zwischen benachbarten Zylindern 6, so daß das Kühlwasser gezwungen wird, an der Außenwand 10 des Zylinderblockes 5 entlang zu strömen und eine intensive Kühlung insbesondere auch der kritischen Stegbereiche bewirkt.As shown in Fig. 1, the inner wall 9 of the displacer extends 8 at a relatively short distance from the outer surface 10 of the cylinder block 5 and, in particular, of the web areas 14 between adjacent cylinders 6, so that the cooling water is forced is along the outer wall 10 of the cylinder block 5 to flow and intensive cooling especially the critical web areas.

Claims (5)

  1. Liquid cooled cylindrical crankcase in open deck construction with outer walls (2) which form an upper flange area (3) for the cylinder head and enclose a cooling water area (4) which is open towards the flange area (3) and into which a cooling water inlet nozzle (7) leads and in which the cylinders (6) are arranged at a distance from the outer walls (2), wherein a displacement body (8) is inserted in the cooling water area (4) which surrounds the cylinders or a cylinder block (5) containing the cylinders and whose inner wall (9) with the outer areas (10) of the cylinders (6) / of the cylindrical block (5) forms the boundary of a gap (11) which is in connection with the cooling water inlet nozzle (7), and wherein the form of the displacement body (8) is brought into line with the form of the cooling water area (4)
    characterised in that
    on the displacement body (8) a spoiler (13) is formed which extends in the direction of the cooling water inlet nozzle (7) and divides the cooling water flow into two part flows, and that at least one passage opening (12) is provided on each side of the spoiler (13) for each of the part flows in such a way that one part flow is guided along the cylinders (6) / the cylinder block (5) on one side and the other part flow is guided along the cylinders (6) / the cylinder block (5) on the other side of the cylindrical crankcase (1).
  2. Cylindrical crankcase according to claim 1
    characterised in that
    the inner wall (9) of the displacement body (8) extends to close to the web areas (14) between the cylinders (6).
  3. Cylindrical crankcase according to claim 1 or 2
    characterised in that
    the displacement body (8) has a low heat capacity.
  4. Cylindrical crankcase according to claim 3
    characterised in that
    the displacement body (8) is formed as a hollow body.
  5. Cylindrical crankcase according to claim 3 or 4
    characterised in that
    the displacement body (8) is made from synthetic material.
EP98107816A 1997-05-15 1998-04-29 Water cooled cylinder block Expired - Lifetime EP0878618B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19720380 1997-05-15
DE19720380A DE19720380C1 (en) 1997-05-15 1997-05-15 Liquid-cooled crank housing for engine

Publications (3)

Publication Number Publication Date
EP0878618A2 EP0878618A2 (en) 1998-11-18
EP0878618A3 EP0878618A3 (en) 1999-05-26
EP0878618B1 true EP0878618B1 (en) 2002-09-25

Family

ID=7829542

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98107816A Expired - Lifetime EP0878618B1 (en) 1997-05-15 1998-04-29 Water cooled cylinder block

Country Status (3)

Country Link
US (1) US5988120A (en)
EP (1) EP0878618B1 (en)
DE (1) DE19720380C1 (en)

Families Citing this family (12)

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US6581550B2 (en) * 2000-06-30 2003-06-24 Toyota Jidosha Kabushiki Kaisha Cooling structure of cylinder block
DE10112132A1 (en) * 2001-03-14 2002-09-19 Bayerische Motoren Werke Ag Cylinder crankcase for a liquid-cooled internal combustion engine
US6988480B2 (en) * 2002-09-16 2006-01-24 Caterpillar Inc. Cylinder block for an internal combustion engine having a locally thickened end wall
JP4262564B2 (en) * 2003-10-10 2009-05-13 日産自動車株式会社 Internal combustion engine cylinder block
US7032547B2 (en) * 2004-04-22 2006-04-25 Honda Motor Co., Ltd. Cylinder block cooling arrangement for multi-cylinder internal combustion engine
JP4411335B2 (en) * 2007-05-16 2010-02-10 本田技研工業株式会社 Water jacket structure for water-cooled internal combustion engine
DE102008013879B4 (en) 2008-03-12 2020-08-13 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Crankcase with displacer in the coolant duct
US7814879B2 (en) * 2008-04-23 2010-10-19 Techtronic Outdoor Products Technology Limited Monolithic block and valve train for a four-stroke engine
JP4547017B2 (en) * 2008-04-25 2010-09-22 トヨタ自動車株式会社 Internal combustion engine cooling structure
US8061324B2 (en) * 2009-04-01 2011-11-22 Murad Dharani High performance resin piston internal combustion engine
GB2527328A (en) * 2014-06-18 2015-12-23 Gm Global Tech Operations Inc An engine block for an internal combustion engine
US9810134B2 (en) * 2015-08-13 2017-11-07 Ford Global Technologies, Llc Internal combustion engine cooling system

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Also Published As

Publication number Publication date
US5988120A (en) 1999-11-23
DE19720380C1 (en) 1998-07-09
EP0878618A2 (en) 1998-11-18
EP0878618A3 (en) 1999-05-26

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