EP1215376B1 - Internal combustion engine - Google Patents

Internal combustion engine Download PDF

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Publication number
EP1215376B1
EP1215376B1 EP01129683A EP01129683A EP1215376B1 EP 1215376 B1 EP1215376 B1 EP 1215376B1 EP 01129683 A EP01129683 A EP 01129683A EP 01129683 A EP01129683 A EP 01129683A EP 1215376 B1 EP1215376 B1 EP 1215376B1
Authority
EP
European Patent Office
Prior art keywords
coolant
pump
timing
chamber
gear case
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
EP01129683A
Other languages
German (de)
French (fr)
Other versions
EP1215376A3 (en
EP1215376A2 (en
Inventor
Samuel Aaron Mcclure
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.)
Deere and Co
Original Assignee
Deere and Co
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Filing date
Publication date
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Publication of EP1215376A2 publication Critical patent/EP1215376A2/en
Publication of EP1215376A3 publication Critical patent/EP1215376A3/en
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Publication of EP1215376B1 publication Critical patent/EP1215376B1/en
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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
    • F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
    • F02F7/0073—Adaptations for fitting the engine, e.g. front-plates or bell-housings
    • 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
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • 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
    • F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
    • 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
    • F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
    • F02F7/007—Adaptations for cooling
    • 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
    • F01P2070/00—Details
    • 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control

Definitions

  • the invention relates to an internal combustion engine having a cylinder block, a cylinder head and a control housing cover, wherein the control housing cover and the cylinder block form a control housing and a pump inlet chamber and a pump outlet chamber, which are separated from each other.
  • US-A-4,938,185 shows a control housing cover for an internal combustion engine, wherein in the control housing cover pump chambers and connections of a coolant system are provided in which they are formed in the control housing cover and which is formed substantially in one piece.
  • the timing cover of the present invention provides a cover for valve control.
  • the valve control is arranged in a control housing, which is formed by the front surface of the cylinder block and the control housing cover.
  • the timing cover may also be formed with molded-in terminals for connecting the timing cover to a radiator to divert coolant to and from the heat exchanger.
  • the control housing cover forms a pump inlet chamber, which may be connected to the coolant inlet to receive coolant from the heat exchanger, and a coolant outlet chamber, to which coolant may be supplied from a coolant pump.
  • the pump outlet chamber may communicate with a coolant inlet in the Cylinder block communicate to direct coolant to the cylinder block.
  • the coolant flows in a known manner through the cylinder block and to a cylinder head and is discharged from the cylinder head into a chamber for receiving hot coolant, which may also be formed in the control housing cover.
  • a chamber communicates with a coolant outlet in the control housing cover to deliver the coolant to the heat exchanger.
  • This coolant outlet can house a thermostat.
  • the timing cover can be bolted to the cylinder block and does not need to be bolted to the cylinder head. Accordingly, it is possible to provide a flexible seal between the cylinder head and the timing cover to ensure a tight connection.
  • a coolant pump may be mounted, which receives coolant through an opening in the control housing cover to the pump inlet chamber. An outlet of this coolant pump is directed through a further opening in the control housing cover to a pump outlet chamber for supplying coolant to the cylinder block.
  • the control housing cover may further include a bypass passage from the chamber for receiving hot coolant to the pump inlet chamber to allow coolant flow through the internal combustion engine before the thermostat opens.
  • a new aspect of the described timing case cover is the arrangement of the pump inlet chamber between the pump discharge chamber and the timing case.
  • FIG. 1 a front portion of an internal combustion engine 10 is shown.
  • the internal combustion engine 10 is an in-line engine having a plurality of cylinders.
  • the front surface 12 of a cylinder block 14 as well as the front surface 16 of a cylinder head 18 are shown.
  • the terms “front” and “rear” are used for purposes of illustration only and are not to be construed as limitations.
  • a control housing cover 20 and a coolant pump 22 are also shown.
  • the control housing cover 20 is attached to the cylinder block 14 by a plurality of screws 24 which extend through apertures 26 in the timing housing cover 20 and into threaded openings 28 in the cylinder block 14.
  • the coolant pump 22 has a pump housing 30 which is held on the timing cover 20 by some of the screws 24 extending through apertures 32 in the pump housing 30 and through the openings 26 in the timing cover 20 and into the threaded openings 28 in the housing Cylinder block 14 extend into it.
  • the control housing cover 20 is shown both in Fig. 1 and in Fig. 2 shown.
  • the control housing cover 20 is approximately pan-shaped and has a front wall 36 and protruding side walls 38. Additional projecting partitions 40, 42 and 44 are provided inside the control housing cover 20 to form various chambers as will be described below.
  • the protruding side walls 38, as well as the protruding partitions 40, 42, 44 all form an inner surface 46 of the control housing cover 20. This inner surface 46 engages the front surface 12 of the cylinder block 14. Between the inner surface 46 and the front surface 12, a seal (not shown) is provided to form a seal therebetween.
  • the crankshaft extends through openings 48 in the timing case cover 20.
  • An oil pump (not shown) is disposed in a circular eye 50 surrounding the aperture 48.
  • An inlet of the oil pump is shown at 52.
  • the control housing cover 20 is fixedly connected to a coolant inlet 54 for connection to a hose to receive coolant from a heat exchanger.
  • the control housing cover 20 is also fixedly connected to a coolant outlet 56.
  • the coolant outlet 56 also serves as a thermostat housing and communicates with a heat exchanger tube which delivers coolant from the engine 10 to the heat exchanger.
  • the coolant inlet 54 directs coolant into a pump inlet chamber 58, which is determined by the protruding partitions 40, 42 as well as by the front wall 36 and the front surface 12 of the cylinder block 14. Coolant flows from the pump inlet chamber 58 through an opening 60 in the coolant pump, which is mounted on the opposite side of the front wall 36.
  • the coolant pump recirculates the coolant through an opening 62 in the front wall 36 and into a pump outlet chamber 64.
  • the pump outlet chamber 64 is defined by the protruding partition wall 42 as well as the pump outlet chamber 64 protruding side wall 38 formed together with the front wall 36 and the front surface 12. Coolant flows from the pump outlet chamber 64 through the opening 66 in the front 12 of the cylinder block 14 into the cylinder block 14. The coolant then flows through the cylinder block 14 in a conventional manner, around the cylinders and up into the cylinder head 18.
  • Coolant flows from the cylinder head 18 through the opening 68 and into a chamber 68 in the control housing cover 20, which contains hot coolant. From this chamber 68, the coolant flows through the coolant outlet 56, past the thermostats, not shown, and back into the heat exchanger.
  • An elastic seal 70 is attached to the control housing cover 20 in a sealing groove surrounding the opening into the chamber 68.
  • the elastic seal 70 is made of rubber or a synthetic material capable of withstanding high coolant temperatures without decomposition. The elastic seal 70 is required because the control housing cover 20 is bolted only to the cylinder block 14 and is not bolted to the cylinder head 18.
  • a coolant bypass passage 72 is formed in the wall between the chamber 68 and the pump inlet chamber 58. This bypass passage 72 allows coolant to circulate through the engine 10 when the thermostat is closed.
  • the control housing cover 20 has a control housing 74, which is essentially determined by the protruding side walls 38 and the projecting partition 40.
  • the control housing 74 communicates with engine lubricating oil which is used to lubricate a valve timing and a valve timing chain.
  • the control housing cover 20 is formed such that the low-pressure pump inlet chamber 58, the high-pressure Pumpenauslasshunt 64 completely from the control housing 74th separates. Thus, any coolant that escapes from the pump outlet chamber 64 will enter the pump inlet chamber 58 instead of flowing into the control housing 74 where the coolant would contaminate the lubricating oil.
  • the arrangement of the coolant chambers 58, 64 within the control housing 74 improves the reliability of the engine 10 by reducing or eliminating the possibility of coolant leakage into the lubricating oil.
  • the pump housing 30 has a drain port 76 to allow coolant to drain from the cylinder block 14 and cylinder head 18. By disposing the drain port 76 in the pump housing 30, fewer machining operations are required on the cylinder block 12. The drain port may be added to the smaller pump housing 30 at a lower cost.
  • the coolant pump 22 is shown in more detail in FIG. 3.
  • the coolant pump 22 has an impeller 78 with a plurality of vanes 80.
  • the impeller 78 rotates clockwise, as shown in FIG. 3, to move the coolant out of the impeller 78 and through a chamber 82 in the pump housing 30.
  • the coolant then flows through the opening 68 in the control housing cover 20 into the pump outlet chamber 64.
  • the control housing cover 20 provides an integral, one-piece arrangement that forms both the inlet and outlet ports to flow coolant to and away from the engine 10.
  • the coolant path is formed by the control housing cover 20 for high reliability by isolating the pump discharge chamber 64 from the control housing 74.

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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)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Abstract

Internal combustion engine comprises a cylinder block, a cylinder head, and a control housing cover (20). The control housing cover and the cylinder block form a control housing (74), a pump inlet chamber (58), and a pump outlet chamber (64) which are separate from each other. The pump inlet chamber surrounds the pump outlet chamber so that the pump outlet chamber is separated from the control housing. Preferred Features: The control housing cover has a coolant inlet (54) preferably molded within the control housing cover, a thermostat housing, and a chamber (68) to which hot coolant from the cylinder head is fed. A seal (70) is provided between the cylinder head and the control housing lid.

Description

Die Erfindung betrifft einen Verbrennungsmotor mit einem Zylinderblock, einem Zylinderkopf und einem Steuergehäusedeckel, wobei der Steuergehäusedeckel und der Zylinderblock ein Steuergehäuse sowie eine Pumpeneinlasskammer und eine Pumpenauslasskammer bilden, welche voneinander getrennt sind.The invention relates to an internal combustion engine having a cylinder block, a cylinder head and a control housing cover, wherein the control housing cover and the cylinder block form a control housing and a pump inlet chamber and a pump outlet chamber, which are separated from each other.

Die US-A-4,938,185 zeigt einen Steuergehäusedeckel für einen Verbrennungsmotor, wobei in dem Steuergehäusedeckel Pumpenkammern sowie Anschlüsse eines Kühlmittelsystems vorgesehen sind, in dem diese in den Steuergehäusedeckel eingeformt sind und wobei dieser im wesentlichen einstückig ausgebildet ist.US-A-4,938,185 shows a control housing cover for an internal combustion engine, wherein in the control housing cover pump chambers and connections of a coolant system are provided in which they are formed in the control housing cover and which is formed substantially in one piece.

Das der Erfindung zugrunde liegende Problem wird darin gesehen, dass im Fall von Undichtigkeiten in dem Steuergehäusedeckel Kühlmittel in das Steuergehäuse eindringen kann und dort vorhandenes Schmiermittel verunreinigen bzw. die Funktion von dort angeordneten Bauteilen beeinträchtigen kann.The problem underlying the invention is seen in the fact that in the case of leaks in the control housing cover coolant can penetrate into the control housing and there contaminate existing lubricant or affect the function of arranged there components.

Dieses Problem wird erfindungsgemäß durch die Lehre des Patentanspruchs 1 gelöst, wobei in den weiteren Patentansprüchen die Lösung in vorteilhafter Weise weiterentwickelnde Merkmale aufgeführt sind.This problem is inventively solved by the teaching of claim 1, wherein in the other claims, the solution are listed in an advantageous manner developing features.

Der Steuergehäusedeckel der vorliegenden Erfindung stellt eine Abdeckung für eine Ventilsteuerung zur Verfügung. Die Ventilsteuerung ist in einem Steuergehäuse angeordnet, welches durch die Frontfläche des Zylinderblocks und den Steuergehäusedeckel gebildet wird. Der Steuergehäusedeckel kann darüber hinaus mit eingeformten Anschlüssen versehen sein, um den Steuergehäusedeckel mit einem Kühler bzw. einem Wärmetauscher zu verbinden, um Kühlmittel zu dem Wärmetauscher als auch von diesem wegzuleiten. Der Steuergehäusedeckel bildet eine Pumpeneinlasskammer, welche mit dem Kühlmitteleinlass verbunden sein kann, um Kühlmittel von dem Wärmetauscher zu erhalten, sowie eine Kühlmittelauslasskammer, welcher Kühlmittel von einer Kühlmittelpumpe zugeführt werden kann. Die Pumpenauslasskammer kann mit einem Kühlmitteleinlass in dem Zylinderblock in Verbindung stehen, um Kühlmittel zu dem Zylinderblock zu leiten. Das Kühlmittel fließt in bekannter Art und Weise durch den Zylinderblock und zu einem Zylinderkopf und wird von dem Zylinderkopf in eine Kammer zur Aufnahme von heißem Kühlmittel abgegeben, welche ebenfalls in den Steuergehäusedeckel eingeformt sein kann. Eine solche Kammer steht mit einem Kühlmittelauslass in dem Steuergehäusedeckel in Verbindung, um das Kühlmittel an den Wärmetauscher abzugeben. Dieser Kühlmittelauslass kann einen Thermostaten beherbergen.The timing cover of the present invention provides a cover for valve control. The valve control is arranged in a control housing, which is formed by the front surface of the cylinder block and the control housing cover. The timing cover may also be formed with molded-in terminals for connecting the timing cover to a radiator to divert coolant to and from the heat exchanger. The control housing cover forms a pump inlet chamber, which may be connected to the coolant inlet to receive coolant from the heat exchanger, and a coolant outlet chamber, to which coolant may be supplied from a coolant pump. The pump outlet chamber may communicate with a coolant inlet in the Cylinder block communicate to direct coolant to the cylinder block. The coolant flows in a known manner through the cylinder block and to a cylinder head and is discharged from the cylinder head into a chamber for receiving hot coolant, which may also be formed in the control housing cover. Such a chamber communicates with a coolant outlet in the control housing cover to deliver the coolant to the heat exchanger. This coolant outlet can house a thermostat.

Der Steuergehäusedeckel kann mit dem Zylinderblock verschraubt werden und muss nicht mit dem Zylinderkopf verschraubt sein. Entsprechend ist es möglich, eine flexible Dichtung zwischen dem Zylinderkopf und dem Steuergehäusedeckel vorzusehen, um eine dichte Verbindung sicherzustellen.The timing cover can be bolted to the cylinder block and does not need to be bolted to the cylinder head. Accordingly, it is possible to provide a flexible seal between the cylinder head and the timing cover to ensure a tight connection.

An einer Frontseite des Steuergehäusedeckels kann eine Kühlmittelpumpe angebracht sein, welche Kühlmittel durch eine Öffnung in dem Steuergehäusedeckel zu der Pumpeneinlasskammer erhält. Ein Auslass dieser Kühlmittelpumpe ist durch eine weitere Öffnung in dem Steuergehäusedeckel zu einer Pumpenauslasskammer gerichtet, um dem Zylinderblock Kühlmittel zuzuführen.On a front side of the control housing cover, a coolant pump may be mounted, which receives coolant through an opening in the control housing cover to the pump inlet chamber. An outlet of this coolant pump is directed through a further opening in the control housing cover to a pump outlet chamber for supplying coolant to the cylinder block.

Der Steuergehäusedeckel kann darüber hinaus einen Umgehungskanal von der Kammer zur Aufnahme heißen Kühlmittels zu der Pumpeneinlasskammer aufweisen, um einen Kühlmittelfluss durch den Verbrennungsmotor zu ermöglichen, bevor der Thermostat öffnet.The control housing cover may further include a bypass passage from the chamber for receiving hot coolant to the pump inlet chamber to allow coolant flow through the internal combustion engine before the thermostat opens.

Ein neuer Aspekt des beschriebenen Steuergehäusedeckels besteht in der Anordnung der Pumpeneinlasskammer zwischen der Pumpenauslasskammer und dem Steuergehäuse. Als Ergebnis wird Kühlmittel, welches von der auf der Druckseite der Kühlmittelpumpe liegenden Pumpenauslasskammer entweicht, in die Pumpeneinlasskammer und nicht in das Steuergehäuse fließen, wo es das Schmiermittel des Verbrennungsmotors verunreinigen würde. Eine solche Anordnung der Kammern in dem Steuergehäusedeckel verbessert die Zuverlässigkeit des Verbrennungsmotors, indem es den Eintritt von Kühlmittel in das Schmiermittel bzw. -öl verringert oder ausschließt.A new aspect of the described timing case cover is the arrangement of the pump inlet chamber between the pump discharge chamber and the timing case. As a result, coolant escaping from the pump outlet chamber located on the pressure side of the coolant pump will flow into the pump inlet chamber and not into the control housing where it will contaminate the lubricant of the internal combustion engine would. Such an arrangement of the chambers in the control housing cover improves the reliability of the internal combustion engine by reducing or eliminating the entry of coolant into the lubricant or oil.

In der Zeichnung ist ein nachfolgend näher beschriebenes Ausführungsbeispiel der Erfindung dargestellt. Es zeigt:

Fig. 1
eine Explosionsdarstellung eines Frontbereiches eines Verbrennungsmotors,
Fig. 2
eine perspektivische Ansicht einer rückwärtigen oder Innenfläche eines Steuergehäusedeckels und
Fig. 3
eine vergrößerte, perspektivische Darstellung einer Kühlmittelpumpe.
In the drawing, an embodiment of the invention described in more detail below is shown. It shows:
Fig. 1
an exploded view of a front portion of an internal combustion engine,
Fig. 2
a perspective view of a rear or inner surface of a timing cover and
Fig. 3
an enlarged perspective view of a coolant pump.

Mit Bezug auf Fig. 1 wird ein Frontbereich eines Verbrennungsmotors 10 gezeigt. Bei dem Verbrennungsmotor 10 handelt es sich um einen Reihenmotor mit mehreren Zylindern. Es wird die Frontfläche 12 eines Zylinderblocks 14 wie auch die Frontfläche 16 eines Zylinderkopfes 18 gezeigt. Die Begriffe "Front" und "Heck" werden nur zum Zwecke der Erläuterung verwendet und sind nicht als Einschränkungen zu verstehen. Es wird auch ein Steuergehäusedeckel 20 und eine Kühlmittelpumpe 22 gezeigt. Der Steuergehäusedeckel 20 ist an dem Zylinderblock 14 durch eine Mehrzahl von Schrauben 24 angebracht, die sich durch Öffnungen 26 in dem Steuergehäusedeckel 20 und in mit Gewinde versehene Öffnungen 28 in dem Zylinderblock 14 erstrecken. Die Kühlmittelpumpe 22 weist ein Pumpengehäuse 30 auf, das an dem Steuergehäusedeckel 20 durch einige der Schrauben 24 gehalten wird, die sich durch Öffnungen 32 in dem Pumpengehäuse 30 und durch die Öffnungen 26 in dem Steuergehäusedeckel 20 und in die mit Gewinden versehenen Öffnungen 28 in dem Zylinderblock 14 hinein erstrecken.Referring to FIG. 1, a front portion of an internal combustion engine 10 is shown. The internal combustion engine 10 is an in-line engine having a plurality of cylinders. The front surface 12 of a cylinder block 14 as well as the front surface 16 of a cylinder head 18 are shown. The terms "front" and "rear" are used for purposes of illustration only and are not to be construed as limitations. A control housing cover 20 and a coolant pump 22 are also shown. The control housing cover 20 is attached to the cylinder block 14 by a plurality of screws 24 which extend through apertures 26 in the timing housing cover 20 and into threaded openings 28 in the cylinder block 14. The coolant pump 22 has a pump housing 30 which is held on the timing cover 20 by some of the screws 24 extending through apertures 32 in the pump housing 30 and through the openings 26 in the timing cover 20 and into the threaded openings 28 in the housing Cylinder block 14 extend into it.

Der Steuergehäusedeckel 20 wird sowohl in Fig. 1 als auch in Fig. 2 gezeigt. Der Steuergehäusedeckel 20 ist in etwa pfannenförmig und weist eine Frontwand 36 und abstehende Seitenwände 38 auf. Zusätzliche abstehende Zwischenwände 40, 42 und 44 sind im Innern des Steuergehäusedeckels 20 vorgesehen um, wie es unten beschrieben wird, verschiedenartige Kammern zu bilden. Die abstehenden Seitenwände 38, wie auch die abstehenden Zwischenwände 40, 42, 44 bilden alle eine Innenfläche 46 des Steuergehäusedeckels 20. Diese Innenfläche 46 greift an der Frontfläche 12 des Zylinderblocks 14 an. Zwischen der Innenfläche 46 und der Frontfläche 12 ist eine Dichtung (nicht gezeigt) vorgesehen, um dazwischen eine Abdichtung zu bilden.The control housing cover 20 is shown both in Fig. 1 and in Fig. 2 shown. The control housing cover 20 is approximately pan-shaped and has a front wall 36 and protruding side walls 38. Additional projecting partitions 40, 42 and 44 are provided inside the control housing cover 20 to form various chambers as will be described below. The protruding side walls 38, as well as the protruding partitions 40, 42, 44 all form an inner surface 46 of the control housing cover 20. This inner surface 46 engages the front surface 12 of the cylinder block 14. Between the inner surface 46 and the front surface 12, a seal (not shown) is provided to form a seal therebetween.

Die Kurbelwelle erstreckt sich durch Öffnungen 48 in dem Steuergehäusedeckel 20. Eine Ölpumpe (nicht gezeigt) ist in einem runden Auge 50 angeordnet, welches die Öffnung 48 umgibt. Ein Einlass der Ölpumpe ist bei 52 dargestellt.The crankshaft extends through openings 48 in the timing case cover 20. An oil pump (not shown) is disposed in a circular eye 50 surrounding the aperture 48. An inlet of the oil pump is shown at 52.

Der Steuergehäusedeckel 20 ist fest mit einem Kühlmitteleinlass 54 zur Verbindung mit einem Schlauch verbunden, um Kühlmittel von einem Wärmetauscher zu erhalten. Der Steuergehäusedeckel 20 ist auch fest mit einem Kühlmittelauslass 56 verbunden. Der Kühlmittelauslass 56 dient auch als ein Thermostatgehäuse und stellt eine Verbindung mit einem Wärmetauscherschlauch dar, welcher Kühlmittel von dem Verbrennungsmotor 10 zu dem Wärmetauscher liefert.The control housing cover 20 is fixedly connected to a coolant inlet 54 for connection to a hose to receive coolant from a heat exchanger. The control housing cover 20 is also fixedly connected to a coolant outlet 56. The coolant outlet 56 also serves as a thermostat housing and communicates with a heat exchanger tube which delivers coolant from the engine 10 to the heat exchanger.

Der Kühlmitteleinlass 54 leitet Kühlmittel in eine Pumpeneinlasskammer 58, welche durch die abstehenden Zwischenwände 40, 42 wie auch von der Frontwand 36 und der Frontfläche 12 des Zylinderblocks 14 bestimmt wird. Kühlmittel fließt von der Pumpeneinlasskammer 58 durch eine Öffnung 60 in die Kühlmittelpumpe, welche an der gegenüberliegenden Seite der Frontwand 36 angebracht ist. Die Kühlmittelpumpe führt das Kühlmittel durch eine Öffnung 62 in der Frontwand 36 zurück und in eine Pumpenauslasskammer 64. Die Pumpenauslasskammer 64 wird durch die abstehende Zwischenwand 42 wie auch durch die abstehende Seitenwand 38 zusammen mit der Frontwand 36 und der Frontfläche 12 gebildet. Kühlmittel fließt von der Pumpenauslasskammer 64 durch die Öffnung 66 in der Frontseite 12 des Zylinderblocks 14 in den Zylinderblock 14. Das Kühlmittel fließt dann in einer üblichen Weise durch den Zylinderblock 14, um die Zylinder und nach oben in den Zylinderkopf 18.The coolant inlet 54 directs coolant into a pump inlet chamber 58, which is determined by the protruding partitions 40, 42 as well as by the front wall 36 and the front surface 12 of the cylinder block 14. Coolant flows from the pump inlet chamber 58 through an opening 60 in the coolant pump, which is mounted on the opposite side of the front wall 36. The coolant pump recirculates the coolant through an opening 62 in the front wall 36 and into a pump outlet chamber 64. The pump outlet chamber 64 is defined by the protruding partition wall 42 as well as the pump outlet chamber 64 protruding side wall 38 formed together with the front wall 36 and the front surface 12. Coolant flows from the pump outlet chamber 64 through the opening 66 in the front 12 of the cylinder block 14 into the cylinder block 14. The coolant then flows through the cylinder block 14 in a conventional manner, around the cylinders and up into the cylinder head 18.

Kühlmittel fließt von dem Zylinderkopf 18 durch die Öffnung 68 und in eine Kammer 68 in dem Steuergehäusedeckel 20, welche heißes Kühlmittel enthält. Von dieser Kammer 68 fließt das Kühlmittel durch den Kühlmittelauslass 56, an den nicht gezeigten Thermostaten vorbei und zurück in den Wärmetauscher. Eine elastische Dichtung 70 ist an dem Steuergehäusedeckel 20 in einer Dichtungsnut, welche die Öffnung in die Kammer 68 hinein umgibt, angebracht. Die elastische Dichtung 70 ist aus Gummi oder einem synthetischen Material hergestellt, welches in der Lage ist, hohen Kühlmitteltemperaturen ohne Zersetzung zu widerstehen. Die elastische Dichtung 70 wird benötigt, da der Steuergehäusedeckel 20 nur an dem Zylinderblock 14 angeschraubt und nicht mit dem Zylinderkopf 18 verschraubt ist.Coolant flows from the cylinder head 18 through the opening 68 and into a chamber 68 in the control housing cover 20, which contains hot coolant. From this chamber 68, the coolant flows through the coolant outlet 56, past the thermostats, not shown, and back into the heat exchanger. An elastic seal 70 is attached to the control housing cover 20 in a sealing groove surrounding the opening into the chamber 68. The elastic seal 70 is made of rubber or a synthetic material capable of withstanding high coolant temperatures without decomposition. The elastic seal 70 is required because the control housing cover 20 is bolted only to the cylinder block 14 and is not bolted to the cylinder head 18.

Ein Kühlmittelumgehungskanal 72 ist in die Wand zwischen der Kammer 68 und der Pumpeneinlasskammer 58 eingeformt. Dieser Umgehungskanal 72 erlaubt es Kühlmittel, durch den Verbrennungsmotor 10 zu zirkulieren, wenn der Thermostat geschlossen ist.A coolant bypass passage 72 is formed in the wall between the chamber 68 and the pump inlet chamber 58. This bypass passage 72 allows coolant to circulate through the engine 10 when the thermostat is closed.

Der Steuergehäusedeckel 20 weist ein Steuergehäuse 74 auf, welches im wesentlichen durch die abstehenden Seitenwände 38 und die abstehende Zwischenwand 40 bestimmt wird. Das Steuergehäuse 74 kommuniziert mit Schmieröl der Brennkraftmaschine, welches verwendet wird, um eine Ventilsteuerung und eine Ventilsteuerkette zu schmieren. Der Steuergehäusedeckel 20 ist derart ausgebildet, dass die Niederdruck-Pumpeneinlasskammer 58 die Hochdruck-Pumpenauslasskammer 64 vollständig von dem Steuergehäuse 74 trennt. Folglich wird jegliches Kühlmittel, dass aus der Pumpenauslasskammer 64 entweicht, in die Pumpeneinlasskammer 58 gelangen, anstatt in das Steuergehäuse 74 zu fließen, wo das Kühlmittel das Schmieröl verunreinigen würde. Die Anordnung der Kühlmittelkammern 58, 64 innerhalb des Steuergehäuses 74 verbessert die Zuverlässigkeit der Brennkraftmaschine 10 indem die Möglichkeit eines Entweichens von Kühlmittel in das Schmieröl reduziert oder ausgeschlossen wird.The control housing cover 20 has a control housing 74, which is essentially determined by the protruding side walls 38 and the projecting partition 40. The control housing 74 communicates with engine lubricating oil which is used to lubricate a valve timing and a valve timing chain. The control housing cover 20 is formed such that the low-pressure pump inlet chamber 58, the high-pressure Pumpenauslasskammer 64 completely from the control housing 74th separates. Thus, any coolant that escapes from the pump outlet chamber 64 will enter the pump inlet chamber 58 instead of flowing into the control housing 74 where the coolant would contaminate the lubricating oil. The arrangement of the coolant chambers 58, 64 within the control housing 74 improves the reliability of the engine 10 by reducing or eliminating the possibility of coolant leakage into the lubricating oil.

Das Pumpengehäuse 30 weist einen Abflussanschluss 76 auf, um es zu ermöglichen, dass Kühlmittel aus dem Zylinderblock 14 und Zylinderkopf 18 abzulassen. Durch das Anordnen des Abflussanschlusses 76 in dem Pumpengehäuse 30 werden an dem Zylinderblock 12 weniger Bearbeitungsvorgänge erfordert. Der Abflussanschluss kann zu dem kleineren Pumpengehäuse 30 mit geringeren Kosten hinzugefügt werden.The pump housing 30 has a drain port 76 to allow coolant to drain from the cylinder block 14 and cylinder head 18. By disposing the drain port 76 in the pump housing 30, fewer machining operations are required on the cylinder block 12. The drain port may be added to the smaller pump housing 30 at a lower cost.

Die Kühlmittelpumpe 22 wird in Fig. 3 detaillierter dargestellt. Die Kühlmittelpumpe 22 weist ein Laufrad 78 mit einer Mehrzahl von Flügeln 80 auf. Das Laufrad 78 dreht im Uhrzeigersinn, wie es in Fig. 3 gezeigt wird, um das Kühlmittel aus dem Laufrad 78 und durch eine Kammer 82 in dem Pumpengehäuse 30 zu bewegen. Das Kühlmittel fließt dann durch die Öffnung 68 in dem Steuergehäusedeckel 20 in die Pumpenauslasskammer 64.The coolant pump 22 is shown in more detail in FIG. 3. The coolant pump 22 has an impeller 78 with a plurality of vanes 80. The impeller 78 rotates clockwise, as shown in FIG. 3, to move the coolant out of the impeller 78 and through a chamber 82 in the pump housing 30. The coolant then flows through the opening 68 in the control housing cover 20 into the pump outlet chamber 64.

Der Steuergehäusedeckel 20 stellt eine integrale, einstückige Anordnung zur Verfügung, die sowohl den Einlass- als auch den Auslassanschluss bildet, um Kühlmittel zu und weg von der Brennkraftmaschine 10 fließen zu lassen. Zusätzlich ist der Kühlmittelpfad durch den Steuergehäusedeckel 20 zur Erzielung einer hohen Zuverlässigkeit ausgebildet, indem die Pumpenauslasskammer 64 von dem Steuergehäuse 74 isoliert wird.The control housing cover 20 provides an integral, one-piece arrangement that forms both the inlet and outlet ports to flow coolant to and away from the engine 10. In addition, the coolant path is formed by the control housing cover 20 for high reliability by isolating the pump discharge chamber 64 from the control housing 74.

Die Erfindung sollte nicht durch die vorstehende Ausführungsform, sondern nur durch die folgenden Ansprüche begrenzt werden.The invention should not be limited by the above embodiment, but only by the following claims.

Claims (8)

  1. Internal combustion engine having a cylinder block (14), a cylinder head (18) and a timing-gear case cover (20), the timing-gear case cover (20) and the cylinder block (14) forming a timing-gear case and a pump inlet chamber (58) and a pump outlet chamber (64) which are separated from one another, characterized in that the pump inlet chamber (58) encloses the pump outlet chamber (64) in such a way as to separate the pump outlet chamber (64) from the timing-gear case (74).
  2. Internal combustion engine according to Claim 1, characterized in that the timing-gear case cover (20) has a coolant inlet (54) which is preferably integrally formed therein.
  3. Internal combustion engine according to Claim 1 or 2, characterized in that the timing-gear case cover (20) has a thermostat housing and a chamber (68) which receives hot coolant from the cylinder head (18), with a gasket (70) being provided between the cylinder head (18) and the timing-gear case cover (20).
  4. Internal combustion engine according to Claim 3, characterized in that the timing-gear case cover (20) has a bypass duct (72) which enables coolant to flow from the chamber (68) to the pump inlet chamber (58).
  5. Internal combustion engine according to one or more of the preceding claims, characterized by a coolant pump (22) whose housing is connected to an outer side of the timing-gear case cover (20), the coolant pump (22) having a pump chamber and the timing-gear case cover (20) having a first through opening (60) which connects the pump inlet chamber (58) to the pump chamber, and a second through opening (62) which connects the pump chamber to the pump outlet chamber (64).
  6. Internal combustion engine according to Claim 5, characterized in that the timing-gear case cover (20) has an outflow connection (76) which is preferably integrally formed in the timing-gear case cover (20).
  7. Internal combustion engine according to one or more of the preceding claims, characterized in that the cylinder block (14) and the cylinder head (18), the timing-gear case cover (20) and the coolant pump (22) form a coolant path through the internal combustion engine (10) between the coolant inlet (54) and the coolant outlet (56).
  8. Internal combustion engine according to one or more of the preceding claims, characterized in that the timing-gear case (20) is connected to the cylinder block (14) by means of a plurality of bolts (24), and a flexible, compressible gasket (70) is arranged between the cylinder head (18) and the timing-gear case cover (20), the gasket (70) being compressed solely by the bolts (24) which connect the timing-gear case cover (20) to the cylinder block (14).
EP01129683A 2000-12-15 2001-12-13 Internal combustion engine Expired - Lifetime EP1215376B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US738822 2000-12-15
US09/738,822 US6453868B1 (en) 2000-12-15 2000-12-15 Engine timing gear cover with integral coolant flow passages

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EP1215376A2 EP1215376A2 (en) 2002-06-19
EP1215376A3 EP1215376A3 (en) 2003-07-23
EP1215376B1 true EP1215376B1 (en) 2007-06-06

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EP01129683A Expired - Lifetime EP1215376B1 (en) 2000-12-15 2001-12-13 Internal combustion engine

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US (1) US6453868B1 (en)
EP (1) EP1215376B1 (en)
AT (1) ATE364158T1 (en)
BR (1) BR0106138A (en)
CA (1) CA2364775A1 (en)
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MX (1) MXPA01012828A (en)

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DE50112593D1 (en) 2007-07-19
MXPA01012828A (en) 2002-07-09
CA2364775A1 (en) 2002-06-15
BR0106138A (en) 2002-08-13
US20020073951A1 (en) 2002-06-20
EP1215376A3 (en) 2003-07-23
ATE364158T1 (en) 2007-06-15
EP1215376A2 (en) 2002-06-19
US6453868B1 (en) 2002-09-24

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