EP1709307A1 - Coolant pump arrangement for an internal combustion engine - Google Patents

Coolant pump arrangement for an internal combustion engine

Info

Publication number
EP1709307A1
EP1709307A1 EP04803697A EP04803697A EP1709307A1 EP 1709307 A1 EP1709307 A1 EP 1709307A1 EP 04803697 A EP04803697 A EP 04803697A EP 04803697 A EP04803697 A EP 04803697A EP 1709307 A1 EP1709307 A1 EP 1709307A1
Authority
EP
European Patent Office
Prior art keywords
pump
shaft
coolant
combustion engine
internal combustion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04803697A
Other languages
German (de)
French (fr)
Other versions
EP1709307B1 (en
Inventor
Georg Emmersberger
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.)
Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Filing date
Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP1709307A1 publication Critical patent/EP1709307A1/en
Application granted granted Critical
Publication of EP1709307B1 publication Critical patent/EP1709307B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P5/12—Pump-driving arrangements

Definitions

  • the invention relates to a coolant pump arrangement for an internal combustion engine of a motor vehicle comprising motor shafts with a pump housing and a pump shaft with a pump impeller arranged at the end.
  • the necessary cooling of motor vehicle internal combustion engines is usually carried out by means of a coolant circulating in a cooling circuit, such as water, which absorbs heat in areas to be cooled and releases it again at other locations via heat exchangers; pumps are provided for circulating the coolant.
  • a coolant circulating in a cooling circuit, such as water, which absorbs heat in areas to be cooled and releases it again at other locations via heat exchangers; pumps are provided for circulating the coolant.
  • Such a water pump arrangement is shown and described, for example, in DE 199 41 891 A1, according to which the water pump has a pump housing formed from a pump body and a pump cover, which is connected to the crankcase of the internal combustion engine.
  • the pump shaft is received in the pump housing and rotatably supported in an shaft support section.
  • the shaft support gating has three times the pump shaft diameter corresponding length and is loaded with oil for lubrication, the lubricating oil being supplied from the crankcase by means of an oil supply opening.
  • a seal is then provided axially on the shaft support section to seal the pump chamber.
  • This water pump arrangement is very long due to the pump shaft bearing and additionally due to the axially adjoining seal, which can be disadvantageous depending on the installation position, particularly when the internal combustion engine is used in a motorcycle. Long coolant hoses are also required to connect the water pump.
  • the invention is therefore based on the object of developing an above-mentioned coolant pump arrangement with regard to a compact, short-sized internal combustion engine, in particular for use in a motorcycle, with a simple and maintenance-friendly design.
  • the object is achieved with the features of claim 1, wherein the basic idea includes the substantially flying bearing of the pump shaft by means of a aftmaschine within the Brennkr 'angeord Neten bearing.
  • the bearing is arranged inside the internal combustion engine in the cylinder head or in the crankcase.
  • the pump shaft is non-rotatably and coaxially connected to a motor shaft driving it, in particular to a camshaft.
  • the water pump speed and thus also the pump output are thus directly dependent on the engine speed, the pump shaft being able to be driven indirectly or directly by another motor shaft, according to another exemplary embodiment.
  • the pump shaft is expediently mounted by means of the last motor shaft bearing arranged adjacent to the pump arrangement. If the pump shaft is connected to a camshaft, the last camshaft bearing is also a bearing element for the pump shaft carrying the pump impeller.
  • An embodiment of the invention is very preferred in which a seal, in particular a mechanical seal, is arranged between the pump housing and the pump shaft, by means of which a centering is also carried out.
  • the mechanical seal is designed like a pipe section and seals with its radially inner surface against the pump shaft. With its radially outer surface, the seal is supported on the inner radius of a receptacle on the pump housing on the one hand and centering on the inner radius of a receptacle on the crankcase on the other hand. It is considered to be very expedient if, in order to fix the pump impeller and pump shaft to the motor shaft by means of a screw connection, the pump shaft is hollow and the motor shaft has a thread at the end. The pump shaft is centered on the inside or outside of the motor shaft.
  • FIG. 1 shows a coolant pump arrangement for an internal combustion engine of a motor vehicle
  • Figure 2 is a detailed view of a coolant pump arrangement for an internal combustion engine of a motor vehicle in section.
  • FIG. 1 shows a coolant pump arrangement 100 for an internal combustion engine of a motor vehicle, not shown here, in the present case a four-cylinder in-line engine for a motorcycle.
  • the coolant pump arrangement 100 is connected on the end face to the cylinder head 102 of the internal combustion engine, the internal combustion engine being installed transversely to the direction of travel, so that the individual cylinders lie next to one another with the head inclined obliquely forward.
  • the coolant pump arrangement 100 is accordingly arranged on the left in the direction of travel.
  • the cylinders are filled through inlet ports 150, 152, 154, 156 from above, while the combustion gases are discharged obliquely downwards / forwards; Accordingly, the intake camshaft for actuating the intake valves 158, 160, 162, 164 lies at the top.
  • the coolant pump arrangement 100 comprises a suction nozzle 168, through which coolant, for example cooling water, is sucked in via the thermostat 166 of the cooler 170. In area 172, the coolant is fed to the water jacket, the coolant flow being divided into a main flow for cooling the cylinder head 102 and a partial flow for cooling the crankcase.
  • the coolant flows according to a flow control due to the thermostat setting bypassing the cooler 170 directly via the short-circuit nozzle 174 back to the suction nozzle 168. This only regulates when a predetermined temperature is reached Thermostat 166 cuts off the short-circuit current, so that the suction connection 168 is acted upon, including the cooler 170, via the line 176.
  • FIG. 2 A detailed view of a coolant pump arrangement 200 for an internal combustion engine of a motor vehicle is shown in section in FIG. 2.
  • the coolant pump arrangement 200 is connected on the end face to the cylinder head 202 of the internal combustion engine and sucks in coolant through a suction port 222, the pressure side of the radial pump being designated by 226.
  • the cylinder head 202 comprises shell-like bearing points which receive the camshafts.
  • the camps are closed by means of bearing bridges, not shown here.
  • the last bearing 220 of the intake camshaft 204 adjacent to the cam 224 is shown in the figure.
  • the coolant pump shaft 206 is coaxially connected to the camshaft 204.
  • a screw through the hollow coolant pump shaft 206 in a thread 228 at the camshaft end ensures a frictional connection between the pump impeller 218, pump shaft 206 and camshaft 204.
  • the pump shaft 206 is centered on the inside or alternatively on the outside of the camshaft.
  • the coolant pump housing 214 is provided with a pressed-in standard mechanical seal 212 and screwed to the cylinder head 202, the housing of the mechanical seal 212 serving to center the camshaft bearing axis in the cylinder head 202.
  • the coolant pump cover 216 is connected to the coolant pump housing 214.
  • the oil leakage on the cylinder head side is achieved by means of a shaft sealing ring 208 pressed in between the coolant pump bearing cover 210 and the cylinder head 202.
  • a separate mounting of the pump shaft 206 is therefore unnecessary, so that the overall length of the internal combustion engine can be reduced considerably. This is a significant improvement, particularly in the case of an in-line four-cylinder installed transversely in a motorcycle. Due to the compact dimensions and the associated small projection area in the direction of travel, there are particular advantages with regard to aerodynamics, consumption, acceleration and top speed. Furthermore, the required space, weight and costs are reduced.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

A coolant pump arrangement for an internal-combustion engine of a motor vehicle is provided, which includes engine shafts. The coolant pump arrangement encompasses a pump housing and a pump shaft, one end of which is provided with a pump impeller. The pump shaft is essentially cantilevered by way of a bearing that is disposed inside the internal combustion engine.

Description

Kuhlmittelpumpenanordnung für eine BrennkraftmaschineCoolant pump arrangement for an internal combustion engine
Die Erfindung betrifft gemäß dem Oberbegriff des Anspruchs 1 eine Kuhlmittelpumpenanordnung für eine Motorwellen umfassende Brennkraftmaschine eines Kraftfahrzeugs mit einem Pumpengehäuse und einer Pumpenwelle mit einem endseitig angeordneten Pumpenlaufrad.According to the preamble of claim 1, the invention relates to a coolant pump arrangement for an internal combustion engine of a motor vehicle comprising motor shafts with a pump housing and a pump shaft with a pump impeller arranged at the end.
Üblicherweise erfolgt die notwendige Kühlung von Kraftfahrzeugbrennkraft- maschinen mittels eines in einem Kühlkreislauf zirkulierenden Kühlmittels, wie Wasser, welches in zu kühlenden Bereichen Wärme aufnimmt und diese über Wärmetauscher an anderer Stelle wieder abgibt; zur Umwälzung des Kühlmittels sind Pumpen vorgesehen.The necessary cooling of motor vehicle internal combustion engines is usually carried out by means of a coolant circulating in a cooling circuit, such as water, which absorbs heat in areas to be cooled and releases it again at other locations via heat exchangers; pumps are provided for circulating the coolant.
Eine derartige Wasserpumpenanordnung zeigt und beschreibt beispielsweise die DE 199 41 891 A1 , derzufolge die Wasserpumpe ein aus einem Pumpenkörper und einer Pumpenabdeckung gebildetes Pumpengehäuse aufweist, welches mit dem Kurbelgehäuse der Brennkraftmaschine verbunden ist. Im Pumpengehäuse ist die Pumpenwelle aufgenommen und in einem ellenstützabschnitt drehbar gelagert. Der Wellenstützanschnitt weist dabei eine dem Dreifachen des Pumpenwellendurchmessers entsprechende Länge auf und ist zur Schmierung ölbeaufschlagt, wobei das Schmieröl mittels einer Ölzuführöffnung aus dem Kurbelgehäuse zugeführt wird. Zur Abdichtung des Pumpenraumes ist axial an den Wellenstützabschnitt anschließend eine Dichtung vorgesehen.Such a water pump arrangement is shown and described, for example, in DE 199 41 891 A1, according to which the water pump has a pump housing formed from a pump body and a pump cover, which is connected to the crankcase of the internal combustion engine. The pump shaft is received in the pump housing and rotatably supported in an shaft support section. The shaft support gating has three times the pump shaft diameter corresponding length and is loaded with oil for lubrication, the lubricating oil being supplied from the crankcase by means of an oil supply opening. A seal is then provided axially on the shaft support section to seal the pump chamber.
Diese Wasserpumpenanordnung baut aufgrund der Pumpenwellenlagerung und zusätzlich bedingt durch die an diese axial anschließende Dichtung sehr lang, was insbesondere bei einem Einsatz der Brennkraftmaschine in einem Kraftrad je nach Einbaulage nachteilig sein kann. Zudem sind zum Anschluss der Wasserpumpe lange Kühlmittelschläuche erforderlich.This water pump arrangement is very long due to the pump shaft bearing and additionally due to the axially adjoining seal, which can be disadvantageous depending on the installation position, particularly when the internal combustion engine is used in a motorcycle. Long coolant hoses are also required to connect the water pump.
Ein Brennkraftmaschine mit einer Motorwelle, welche möglicht viele für die Funktion des Motors relevante Bauteile aufnehmen soll, ist in der DE 199 45 948 A1 gezeigt und beschrieben. Diese Motorwelle nimmt neben Massenausgleichgewichten endseitig ein Pumpenrad zur Kühlmittelumwälzung auf, wobei das Wasserpumpengehäuse abhängig von der Anordnung der Motorwelle im Kurbelgehäuse oder im Zylinderkopf integriert ist.An internal combustion engine with a motor shaft, which should accommodate as many components relevant to the function of the engine as possible, is shown and described in DE 199 45 948 A1. In addition to mass balance weights, this motor shaft receives a pump wheel for coolant circulation at the end, the water pump housing being integrated in the crankcase or in the cylinder head depending on the arrangement of the motor shaft.
Eine derartige Integration der Wasserpumpenanordnung in das Kurbelgehäuse oder den Zylinderkopf bedingt eine sehr aufwändige Konstruktion beispielsweise mit T-Stoß am Zylinderkopft, Spezialdichtung und/oder Zusatzlager, eine besondere Zylinderkopfbearbeitung ist erforderlich, zudem ist eine Entkoppelung der Pumpenanordnung nicht möglich.Such integration of the water pump arrangement into the crankcase or the cylinder head requires a very complex construction, for example with a T-joint on the cylinder head, special seal and / or additional bearing, special cylinder head machining is required, and decoupling of the pump arrangement is also not possible.
Der Erfindung liegt daher die Aufgabe zugrunde, eine eingangs genannte Kuhlmittelpumpenanordnung in Hinblick auf eine kompakte, kurz bauende Brennkraftmaschine, insbesondere zur Verwendung in einem Kraftrad, bei gleichzeitig einfachem und wartungsfreundlichem Aufbau, weiterzubilden. Die Lösung der Aufgabe erfolgt mit den Merkmalen des Anspruchs 1 , wobei der zugrundeliegende Gedanke die im wesentlichen fliegende Lagerung der Pumpenwelle mittels eines innerhalb der Brennkr'aftmaschine angeord neten Lagers umfasst. Erfindungsgemäß ist das Lager innerhalb der Brennkraftmaschine im Zylinderkopf oder im Kurbelgehäuse angeordnet.The invention is therefore based on the object of developing an above-mentioned coolant pump arrangement with regard to a compact, short-sized internal combustion engine, in particular for use in a motorcycle, with a simple and maintenance-friendly design. The object is achieved with the features of claim 1, wherein the basic idea includes the substantially flying bearing of the pump shaft by means of a aftmaschine within the Brennkr 'angeord Neten bearing. According to the invention, the bearing is arranged inside the internal combustion engine in the cylinder head or in the crankcase.
Besonders bevorzugte Ausgestaltungen und Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.Particularly preferred refinements and developments of the invention are the subject of the dependent claims.
Gemäß einem besonders vorteilhaften Ausführungsbeispiel der Erfindung ist die Pumpenwelle drehfest und koaxial mit einer sie antreibenden Motorwelle, insbesondere mit einer Nockenwelle, verbunden. Die Wasserpumpendrehzahl und somit auch die Pumpenleistung sind so unmittelbar abhängig von der Brennkraftmaschinendrehzahl, wobei die Pumpenwelle einem anderen Ausführungsbeispiel zufolge auch mittel- oder unmittelbar von einer anderen Motorwelle antreibbar sein kann.According to a particularly advantageous embodiment of the invention, the pump shaft is non-rotatably and coaxially connected to a motor shaft driving it, in particular to a camshaft. The water pump speed and thus also the pump output are thus directly dependent on the engine speed, the pump shaft being able to be driven indirectly or directly by another motor shaft, according to another exemplary embodiment.
Zweckmäßigerweise erfolgt eine Lagerung der Pumpenwelle mittels des der Pumpenanordnung benachbart angeordneten letzten Motorwellenlagers. Falls die Pumpenwelle mit einer Nockenwelle verbunden ist, ist das letzte Nockenwellenlager zugleich Lagerelement für die das Pumpenlaufrad tragende Pumpenwelle.The pump shaft is expediently mounted by means of the last motor shaft bearing arranged adjacent to the pump arrangement. If the pump shaft is connected to a camshaft, the last camshaft bearing is also a bearing element for the pump shaft carrying the pump impeller.
Sehr bevorzugt ist eine Ausgestaltung der Erfindung, bei welcher zwischen Pumpengehäuse und Pumpenwelle eine Dichtung, insbesondere eine Gleitringdichtung, angeordnet ist, mittels welcher zugleich eine Zentrierung erfolgt. Die Gleitringdichtung ist rohrabschnittsartig ausgestaltet und dichtet mit ihrer radial inneren Fläche gegen die Pumpenwelle. Mit ihrer radial äußeren Fläche stützt sich die Dichtung am Innenradius einer Aufnahme am Pumpengehäuse einerseits und zentrierend am Innenradius einer Aufnahme am Kurbelgehäuse andererseits ab. Als sehr zweckmäßig wird es angesehen, wenn zur Festlegung von Pumpenlaufrad und Pumpenwelle an der Motorwelle mittels einer Schraubverbindung die Pumpenwelle hohl ausgebildet ist und die Motorwelle endseitig ein Gewinde aufweist. Die Pumpenwelle zentriert sich dabei an der Motorwelle innen oder außen.An embodiment of the invention is very preferred in which a seal, in particular a mechanical seal, is arranged between the pump housing and the pump shaft, by means of which a centering is also carried out. The mechanical seal is designed like a pipe section and seals with its radially inner surface against the pump shaft. With its radially outer surface, the seal is supported on the inner radius of a receptacle on the pump housing on the one hand and centering on the inner radius of a receptacle on the crankcase on the other hand. It is considered to be very expedient if, in order to fix the pump impeller and pump shaft to the motor shaft by means of a screw connection, the pump shaft is hollow and the motor shaft has a thread at the end. The pump shaft is centered on the inside or outside of the motor shaft.
Nachfolgend ist unter Bezugnahme auf Figuren, ein besonders zu bevorzugendes Ausführungsbeispiel der Erfindung näher erläutert dabei zeigen schematisch und beispielhaftA particularly preferred embodiment of the invention is explained in more detail below with reference to figures, which show schematically and by way of example
Figur 1 eine Kuhlmittelpumpenanordnung für eine Brennkraftmaschine eines Kraftfahrzeugs sowie1 shows a coolant pump arrangement for an internal combustion engine of a motor vehicle and
Figur 2 eine Detailansicht einer Kuhlmittelpumpenanordnung fü r eine Brennkraftmaschine eines Kraftfahrzeugs im Schnitt.Figure 2 is a detailed view of a coolant pump arrangement for an internal combustion engine of a motor vehicle in section.
Figur 1 zeigt eine Kuhlmittelpumpenanordnung 100 für eine hier nicht näher dargestellte Brennkraftmaschine eines Kraftfahrzeugs, vorliegend einen Vierzylinder-Reihenmotor für ein Motorrad. Die Kuhlmittelpumpenanordnung 100 ist stirnseitig mit dem Zylinderkopf 102 der Brennkraftmaschine verbunden, wobei die Brennkraftmaschine quer zur Fahrtrichtung eingebaut ist, so dass die einzelnen Zylinder nebeneinander, mit dem Kopf schräg nach vorne geneigt liegen. In Fahrtrichtung ist die Kuhlmittelpumpenanordnung 100 demgemäss links angeordnet. Die Befüllung der Zylinder erfolgt durch Einlassstutzen 150, 152, 154, 156 von oben, während d ie Verbrennungsabgase schräg nach unten/vorne abgeführt werden; Entsprechend liegt die Einlassnockenwelle zur Betätigung der Einlassventile 158, 160, 162, 164 oben. Die Kuhlmittelpumpenanordnung 100 umfasst einen Saugstutzen 168, durch welchen Kühlmittel, beispielsweise Kühlwasser, über das Thermostat 166 des Kühlers 170 angesaut wird. Im Bereich 172 wird das Kühlmittel dem Wassermantel zugeführt, wobei eine Aufteilung des Kühlmittelstromes in einen Hauptstrom zur Kühlung des Zylinderkopfes 102 und ein Teilstrom zur Kühlung des Kurbelgehäuses erfolgt. Falls eine Kühlung der Brennkraftmaschine, beispielsweise während der Warmlaufphase, (noch) nicht erforderlich ist, strömt das Kühlmittel entsprechend einer Vorlaufregelung aufgrund der Thermostatstellung unter Umgehung des Kühlers 170 direkt über den Kurzschlussstutzen 174 wieder zum Saugstutzen 168. Erst bei Erreichen einer vorgegebenen Temperatur regelt das Thermostat 166 den Kurzschlussstrom ab, so dass der Saugstutzen 168 unter Einbeziehung des Kühlers 170 über die Leitung 176 beaufschlagt wird.FIG. 1 shows a coolant pump arrangement 100 for an internal combustion engine of a motor vehicle, not shown here, in the present case a four-cylinder in-line engine for a motorcycle. The coolant pump arrangement 100 is connected on the end face to the cylinder head 102 of the internal combustion engine, the internal combustion engine being installed transversely to the direction of travel, so that the individual cylinders lie next to one another with the head inclined obliquely forward. The coolant pump arrangement 100 is accordingly arranged on the left in the direction of travel. The cylinders are filled through inlet ports 150, 152, 154, 156 from above, while the combustion gases are discharged obliquely downwards / forwards; Accordingly, the intake camshaft for actuating the intake valves 158, 160, 162, 164 lies at the top. The coolant pump arrangement 100 comprises a suction nozzle 168, through which coolant, for example cooling water, is sucked in via the thermostat 166 of the cooler 170. In area 172, the coolant is fed to the water jacket, the coolant flow being divided into a main flow for cooling the cylinder head 102 and a partial flow for cooling the crankcase. If cooling of the internal combustion engine, for example during the warm-up phase, is not (yet) necessary, the coolant flows according to a flow control due to the thermostat setting bypassing the cooler 170 directly via the short-circuit nozzle 174 back to the suction nozzle 168. This only regulates when a predetermined temperature is reached Thermostat 166 cuts off the short-circuit current, so that the suction connection 168 is acted upon, including the cooler 170, via the line 176.
Eine Detailansicht einer Kuhlmittelpumpenanordnung 200 für eine Brennkraftmaschine eines Kraftfahrzeugs ist mit Figur 2 im Schnitt dargestellt. Die Kuhlmittelpumpenanordnung 200 ist stirnseitig mit dem Zylinderkopf 202 der Brennkraftmaschine verbunden und saugt durch einen Saugstutzen 222 Kühlmittel an, die Druckseite der Radialpumpe ist mit 226 bezeichnet. Zur Lagerung der Nockenwellen umfasst der Zylinderkopf 202 schalenartige Lagerstellen, welche die Nockenwellen aufnehmen. Die Lager werden geschlossen mittels hier nicht dargestellten Lagerbrücken. In der Figur ist das endseitig letzte, dem Nocken 224 benachbarte Lager 220 der Einlassnockenwelle 204 gezeigt.A detailed view of a coolant pump arrangement 200 for an internal combustion engine of a motor vehicle is shown in section in FIG. 2. The coolant pump arrangement 200 is connected on the end face to the cylinder head 202 of the internal combustion engine and sucks in coolant through a suction port 222, the pressure side of the radial pump being designated by 226. To support the camshafts, the cylinder head 202 comprises shell-like bearing points which receive the camshafts. The camps are closed by means of bearing bridges, not shown here. The last bearing 220 of the intake camshaft 204 adjacent to the cam 224 is shown in the figure.
Mit der Nockenwelle 204 ist koaxial die Kühlmittelpumpenwelle 206 verbunden. Eine Schraube durch die hohle Kühlmittelpumpenwelle 206 in einem Gewinde 228 am Nockenwellenende sorgt dabei für einen Kraftschluss zwischen Pumpenlaufrad 218, Pumpenwelle 206 und Nockenwelle 204. Eine Zentrierung der Pumpenwelle 206 erfolgt wie vorliegend an der Nockenwelle innen oder alternativ außen. Das Kühlmittelpumpengehäuse 214 ist mit einer eingepressten Standard- Gleitringdichtung 212 versehen und mit dem Zylinderkopf 202 verschraubt, wobei das Gehäuse der Gleitringdichtung 212 zur Zentrierung zur Nockenwellenlagerachse im Zylinderkopf 202 dient. Mit dem Kühlmittelpumpengehäuse 214 ist der Kühlmittelpumpendeckel 216 verbunden. Die zylinderkopfseitige Oldichtigkeit wird mittels eines zwischen Kühlmittelpumpenlagerdeckel 210 und Zylinderkopf 202 eingepressten Wellendichtrings 208 erreicht.The coolant pump shaft 206 is coaxially connected to the camshaft 204. A screw through the hollow coolant pump shaft 206 in a thread 228 at the camshaft end ensures a frictional connection between the pump impeller 218, pump shaft 206 and camshaft 204. As in the present case, the pump shaft 206 is centered on the inside or alternatively on the outside of the camshaft. The The coolant pump housing 214 is provided with a pressed-in standard mechanical seal 212 and screwed to the cylinder head 202, the housing of the mechanical seal 212 serving to center the camshaft bearing axis in the cylinder head 202. The coolant pump cover 216 is connected to the coolant pump housing 214. The oil leakage on the cylinder head side is achieved by means of a shaft sealing ring 208 pressed in between the coolant pump bearing cover 210 and the cylinder head 202.
Das endseitig letzte, dem Nocken 224 benachbarte Lager 220 der Einlassnockenwelle 204 ist gleichzeitig Lagerelement für die fliegend gelagerte Pumpenwelle 206, welche das Pumpenlaufrad 218 trägt. Eine gesonderte Lagerung der Pumpenwelle 206 erübrigt sich somit, so dass die Baulänge der Brennkraftmaschine erheblich verringert werden kann. Insbesondere bei einem quer in ein Motorrad eingebauten Reihen- Vierzylinder stellt dies eine wesentliche Verbesserung dar. Aufgrund der kompakten Abmessung und der damit einhergehenden geringen Projektionsfläche in Fahrtrichtung ergeben sich besondere Vorteile hinsichtlich Aerodynamik, Verbrauch, Beschleunigung und Endgeschwindigkeit. Ferner werden erforderlicher Bauraum, Gewicht und Kosten verringert. Insbesondere aufgrund der Einbau läge quer und schräg nach vorne geneigt kann eine Verbindung zwischen Kühler und unmittelbar dahinter angeordnetem Zylinderkopf 202 bzw. Kühlmittelpumpe mittels sehr kurzer Schläuche erfolgen. Neben den genannten Vorteilen ergeben sich auch Vorteile in Bezug auf das Design. The last end bearing 220 of the intake camshaft 204, which is adjacent to the cam 224, is at the same time a bearing element for the overhung pump shaft 206, which carries the pump impeller 218. A separate mounting of the pump shaft 206 is therefore unnecessary, so that the overall length of the internal combustion engine can be reduced considerably. This is a significant improvement, particularly in the case of an in-line four-cylinder installed transversely in a motorcycle. Due to the compact dimensions and the associated small projection area in the direction of travel, there are particular advantages with regard to aerodynamics, consumption, acceleration and top speed. Furthermore, the required space, weight and costs are reduced. In particular, due to the installation would be inclined transversely and obliquely forward, a connection can be made between the cooler and the cylinder head 202 or coolant pump arranged immediately behind it by means of very short hoses. In addition to the advantages mentioned, there are also advantages in terms of design.

Claims

Patentansprüche claims
1. Kuhlmittelpumpenanordnung für eine Motorwellen umfassende Brennkraftmaschine eines Kraftfahrzeugs mit einem Pumpengehäuse und einer Pumpenwelle mit einem endseitig angeordneten Pumpenlaufrad, gekennzeichnet durch eine im wesentlichen fliegende Lagerung der Pumpenwelle (206) mittels eines innerhalb der Brennkraftmaschine angeordneten Lagers (220).1. Coolant pump arrangement for an internal combustion engine of a motor vehicle comprising motor shafts with a pump housing and a pump shaft with a pump impeller arranged at the end, characterized by an essentially floating bearing of the pump shaft (206) by means of a bearing (220) arranged inside the internal combustion engine.
2. Kuhlmittelpumpenanordnung nach Anspruch 1 , dadurch gekennzeichnet, dass die Pumpenwelle (206) koaxial mit einer Motorwelle, insbesondere mit einer Nockenwelle (204), verbunden ist.2. Coolant pump arrangement according to claim 1, characterized in that the pump shaft (206) is connected coaxially with a motor shaft, in particular with a camshaft (204).
3. Kuhlmittelpumpenanordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass eine Lagerung (220) der Pumpenwelle (206) mittels des der Pumpenanordnung (200) benachbart angeordneten letzten Motorwellenlagers (220) erfolgt.3. Coolant pump arrangement according to claim 1 or 2, characterized in that a bearing (220) of the pump shaft (206) by means of the last motor shaft bearing (220) arranged adjacent to the pump arrangement (200).
4. Kuhlmittelpumpenanordnung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass zwischen Pumpengehäuse (214) und Pumpenwelle (206) eine Dichtung (212) angeordnet ist, mittels welcher zugleich eine Zentrierung erfolgt.4. Coolant pump arrangement according to one of claims 1 to 3, characterized in that between the pump housing (214) and Pump shaft (206) a seal (212) is arranged, by means of which centering takes place at the same time.
5. Kuhlmittelpumpenanordnung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass zur Festlegung von Pumpenlaufrad (218) und Pumpenwelle (206) an der iVlotorwelle (204) mittels einer Schraubverbindung die Pumpenwelle (206) hohl ausgebildet ist und die Motorwelle (204) endseitig ein Gewinde (228) aufweist. 5. Coolant pump arrangement according to one of claims 1 to 4, characterized in that to fix the pump impeller (218) and pump shaft (206) on the iVlotorwelle (204) by means of a screw connection, the pump shaft (206) is hollow and the motor shaft (204) has a thread (228) at the end.
EP04803697A 2004-01-27 2004-12-09 Coolant pump arrangement for an internal combustion engine Expired - Fee Related EP1709307B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004004050A DE102004004050A1 (en) 2004-01-27 2004-01-27 Coolant pump arrangement for an internal combustion engine
PCT/EP2004/014043 WO2005071237A1 (en) 2004-01-27 2004-12-09 Coolant pump arrangement for an internal combustion engine

Publications (2)

Publication Number Publication Date
EP1709307A1 true EP1709307A1 (en) 2006-10-11
EP1709307B1 EP1709307B1 (en) 2011-10-26

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EP04803697A Expired - Fee Related EP1709307B1 (en) 2004-01-27 2004-12-09 Coolant pump arrangement for an internal combustion engine

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US (1) US7343883B2 (en)
EP (1) EP1709307B1 (en)
JP (1) JP4747105B2 (en)
AT (1) ATE530748T1 (en)
DE (1) DE102004004050A1 (en)
ES (1) ES2372937T3 (en)
WO (1) WO2005071237A1 (en)

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Also Published As

Publication number Publication date
JP4747105B2 (en) 2011-08-17
JP2007519850A (en) 2007-07-19
US7343883B2 (en) 2008-03-18
US20060254539A1 (en) 2006-11-16
ATE530748T1 (en) 2011-11-15
ES2372937T3 (en) 2012-01-27
EP1709307B1 (en) 2011-10-26
WO2005071237A1 (en) 2005-08-04
DE102004004050A1 (en) 2005-08-11

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