EP1058777A1 - Oil pickup system for an internal combustion engine, notably a single-cylinder diesel engine - Google Patents

Oil pickup system for an internal combustion engine, notably a single-cylinder diesel engine

Info

Publication number
EP1058777A1
EP1058777A1 EP99967005A EP99967005A EP1058777A1 EP 1058777 A1 EP1058777 A1 EP 1058777A1 EP 99967005 A EP99967005 A EP 99967005A EP 99967005 A EP99967005 A EP 99967005A EP 1058777 A1 EP1058777 A1 EP 1058777A1
Authority
EP
European Patent Office
Prior art keywords
oil
intake
internal combustion
intake system
combustion engine
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
EP99967005A
Other languages
German (de)
French (fr)
Other versions
EP1058777B1 (en
Inventor
Günter Kampichler
Albert Madl
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.)
Motorenfabrik Hatz GmbH and Co KG
Original Assignee
Motorenfabrik Hatz GmbH and Co KG
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 Motorenfabrik Hatz GmbH and Co KG filed Critical Motorenfabrik Hatz GmbH and Co KG
Publication of EP1058777A1 publication Critical patent/EP1058777A1/en
Application granted granted Critical
Publication of EP1058777B1 publication Critical patent/EP1058777B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/0004—Oilsumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/03—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/06—Means for keeping lubricant level constant or for accommodating movement or position of machines or engines
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/0004—Oilsumps
    • F01M2011/007—Oil pickup tube to oil pump, e.g. strainer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/0004—Oilsumps
    • F01M2011/007—Oil pickup tube to oil pump, e.g. strainer
    • F01M2011/0075—Oil pickup tube to oil pump, e.g. strainer with a plurality of tubes

Definitions

  • Oil intake system for an internal combustion engine in particular a single-cylinder diesel engine
  • the invention relates to an oil intake system for an internal combustion engine according to the preamble of claim 1.
  • Combustion air intake system arrive, which in extreme cases can lead to engine damage in diesel engines due to an increase in speed that can no longer be controlled.
  • the present invention is therefore based on the object of providing an oil intake system which avoids the disadvantages mentioned above and which responds particularly sensitively enough to reliably avoid the intake of air even in the case of strong inclined positions.
  • the ⁇ lansaugsystem least three Olansaugrohre with at least four suction heads on which the oil pump are connected via a suction pipe with 'and which are arranged in the sump such that when the inclined position of the internal combustion engine, the suction is prevented of air through arranged in the ⁇ lansaugrohren control valves.
  • the control valves are open when the oil pan is in the "normal" horizontal position. If the oil pan is extremely inclined, however, only those control valves that are wetted with oil are open. All other control valves remain closed.
  • the oil intake system according to the present invention can easily be retrofitted to existing internal combustion engines, in that only the oil pan and the normal suction basket are to be dismantled and the latter is to be replaced by the oil intake system according to the present invention.
  • the control valves can be regulated mechanically or in another suitable manner.
  • control valves are displaceable under gravity on valve bars arranged on slide rods and valve seats arranged on the tube ends, makes a simple but nevertheless sensitive mechanical response Gravity control of the valves implemented.
  • this gravity control also has a "fail-safe" function, since simultaneous closing of all valves is reliably prevented by arranging two valve plates on a common slide rod.
  • An advantageous embodiment of the invention provides that three oil suction pipes are arranged in an H-shape and the two side pipes each have two suction heads. This arrangement ensures that there is sufficient oil in each tilt position at least at one corner of the oil pan to ensure that oil is sucked in without air.
  • the suction pipe can be arranged, for example, centrally over a flange with the connecting pipe between the two side pipes.
  • FIG. 1 Further advantageous embodiments of the oil intake system according to the invention can be formed by the X, Z or square arrangement of the oil intake pipes. It is important in each case that there is at least one suction head at all corners of the oil pan, in which the oil level can collect in the case of inclined positions. Depending on the shape of the oil pan, this can also be possible, for example, through a triangular, polygonal or star-shaped arrangement of the oil intake pipes.
  • a further advantageous embodiment of the present invention provides that the suction heads have a suction opening directed towards the tub floor. Without such a design, a minimum oil level of the size of the pipe diameter would have to be present in order not to suck in air. An even lower oil level is only possible with the oil intake openings below according to the advantageous embodiment. It is also advantageous that filter screens are arranged on the suction heads. This prevents the contamination in the oil sump from being sucked in.
  • an advantageous embodiment provides that a check valve is arranged at the transition between the intake manifold and the oil pump seat in order to prevent the intake manifold and pump chamber from running dry when the engine is at a standstill.
  • Fig. 1 is a schematic plan view of a
  • Fig. 2 is a schematic side view from the direction A-A in Fig. 1 in section, wherein the oil pan is in a horizontal position and Fig. 3 is a view according to Fig. 2, but with tilted
  • the H-shaped oil intake system consists of a total of three oil intake pipes 26, 27, 28, each of which has an axially displaceably mounted shift rod 1, 2, 3, at the two ends of which valve plates 4, 5, 6, 7, 8, 9 are arranged.
  • the valves of the oil intake pipe 27 are open, although they are not oil-wetted. To suck in air too prevent the valve of the tube 26 formed from the valve plate 4 and the valve seat 30 is closed and the valve formed from the valve plate 5 and the valve seat 31 arranged at the other end of the slide rod is opened.
  • valve rod 1 is axially displaceably supported by the axial bearings 10, 11.
  • the oil suction pipe 28 has the open control valve formed by valve plate 8 and valve seat 34 and the closed control valve formed by valve plate 9 and valve seat 35.
  • Both valve plates 8, 9 are connected via the axially displaceable sliding rod 3, which is movably mounted in the bearings 14, 15.
  • the two side tubes 27, 28 also have filter screens 20, 21, 22, 23.
  • the bearings 12, 13 of the slide rod 2 in the tube 27 are shown.
  • valve plates 6, 7 with the valve seats 32, 33 are arranged.
  • the oil flow is shown in Fig. 1 by the arrows 36. 1 also shows the outlet opening 29, which is arranged centrally on the upper side of the suction pipe 26 and is connected to the suction pipe 43, not shown, for the oil pump 45, also not shown.
  • the valve plates 5 and 8 move into their open position due to the force of gravity, the valve plates 4 and 9 being displaced into their closed position via the push rods 1 and 3. This ensures that no air is sucked into the suction system, which is now only open on the suction head 19.
  • the position of the valves in the oil suction pipe 27 is irrelevant in the inclined position shown in FIG. 1, since the pipe 27 is completely decoupled from the rest of the oil suction system and thus in particular from the outlet opening 29 by the closed valve plate 4.
  • Fig. 2 shows schematically the oil intake system of Fig. 1 in a lateral section, the oil pan 24 attached to the crankcase 52 being in a horizontal position, ie the oil level S2 is parallel to the pan bottom 40.
  • the valve plates 4, 5 of the Tube 26 both opened, ie lifted off the valve seats 30, 31.
  • the pipes 27 and 28 connected to pipe 26 via flanges 25 and the connecting rods 2, 3 are shown in section. Both valves are also open in the two side tubes 27, 28, so that oil is sucked in via all four suction heads 16, 17, 18, 19.
  • a support plate 41 is also attached, which has a plurality of openings 42 which allow unimpeded oil flow.
  • the plate 41 has a suction pipe 43 for an oil pump 45, according to the illustration a gear pump, the housing of which is fastened on the plate 41.
  • the oil pumped by the pump 45 to the points of consumption of the machine goes into a pressure pipe 46.
  • the suction pipe 43 is designed at the lower end as a flange 44, which is used to fasten an elongated, hollow and cylindrical pipe 26 arranged parallel to the bottom 40 of the tub 24 serves.
  • the pipe 26 has a fastening flange 49 for this purpose.
  • a tiltable plate valve 51 is provided on a pin 50, which in the rest position of the machine rests on the flange 49 in a sealing manner and the return flow of the oil from the suction pipe 43 and the pump 45 prevented.
  • a slide rod 1 is axially displaceably mounted in the tube 26.
  • two bearings 10, 11, for example ball bearings are provided in two perforated transverse flanges 47, 48 of the tube 26.
  • the rod 1 carries a flat valve plate 4, 5 at each end, which cooperates with an annular surface designed as a valve seat 30, 31 at each end of the tube 26.
  • Fig. 3 shows the oil intake system of FIG.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Abstract

The invention relates to an oil pickup system for an internal combustion engine, notably a single-cylinder diesel engine, comprising at least three oil pickup tubes (26, 27, 28) which are connected to the oil pump via a suction hose (29) and are arranged in the oil pan (24) in such a way that when the internal combustion engine is positioned at an angle the intake of air is prevented by control valves assigned to the oil pick up tubes.

Description

Ölansaugsystem für eine Brennkraftmaschine, insbesondere einen Einzylinder-Dieselmotor Oil intake system for an internal combustion engine, in particular a single-cylinder diesel engine
Die Erfindung betrifft ein Ölansaugsystem für eine Brennkraftmaschine gemäß dem Oberbegriff von Anspruch 1.The invention relates to an oil intake system for an internal combustion engine according to the preamble of claim 1.
Ein wichtiges Kriterium für die maximal zulässige Schräglage beim Betrieb von Brennkraftmaschinen ist das Schmierölsystem- Bei Überschreiten einer kritischen Schräglage der Brennkraftmaschine gilt es zu vermeiden, daß die Ölpumpe Luft ansaugt und daß die im Kurbelgehäuse tieferliegenden Triebwerksteile im Öl schlagen, was zu einer Erhitzung des Schmieröls führt und außerdem den Ölrückfluß z.B. vom Kipphebelgehäuse in die Ölwanne behindert. Schließlich kann Öl bei starken Schräglagen durch die Kurbelgehäuseentlüftung insAn important criterion for the maximum permissible inclination when operating internal combustion engines is the lubricating oil system. If the internal combustion engine exceeds a critical inclination, it is important to avoid that the oil pump draws in air and that the engine parts located lower in the crankcase hit the oil, which causes the lubricating oil to heat up leads and also the oil reflux eg obstructed by the rocker arm housing in the oil pan. After all, oil can get into the crankcase breather when the vehicle is at a steep incline
Verbrennungsluftansaugsystem gelangen, was im Extremfall bei Dieselbrennkraftmaschinen zu Motorschäden durch eine nicht mehr steuerbare Drehzahlerhöhung führen kann.Combustion air intake system arrive, which in extreme cases can lead to engine damage in diesel engines due to an increase in speed that can no longer be controlled.
Extreme Schräglagen der Brennkraftmaschine treten beispielsweise bei ihrem Einsatz als Fahrzeugantrieb auf. Dabei wurde versucht, die oben genannten Probleme dadurch zu vermeiden, daß der Ölspiegel mittels einer tieferen Ölwanne abgesenkt wurde. Durch besonders tief ausgebildete Ölwannen gelingt es zwar, die aufgeführten Nachteile weitgehend zu vermeiden. Derartige Spezialölwannen verursachen aber hohe Kosten in der Fertigung und beschränken den Einsatz des Motors wegen seines größeren Platzbedarfs.Extreme inclinations of the internal combustion engine occur, for example, when it is used as a vehicle drive. An attempt was made to avoid the problems mentioned above by lowering the oil level by means of a deeper oil pan. Particularly deep oil sumps make it possible to largely avoid the disadvantages listed. However, such special oil pans cause high costs in production and limit the use of the engine because of its larger space requirement.
Bei einem bekannten Ölansaugsystem (DE-OS 2339730) der eingangs genannten Art befinden sich die Regelventile jeweils an den Innenenden der Olansaugrohre, also nahe dem Zentrum der Ölwanne. Es besteht daher die Gefahr, daß die Regelventile erst verzögert ansprechen, so daß ein Ansaugen von Restluftmengen in Kauf zu nehmen ist.In a known oil intake system (DE-OS 2339730) of the type mentioned at the outset, the control valves are located at the inner ends of the oil intake pipes, that is, near the center of the oil pan. There is therefore a risk that the Only respond to control valves with a delay, so that residual air quantities must be taken in.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, ein Ölansaugsystem bereitzustellen, welches die oben genannten Nachteile vermeidet und welches insbesondere empfindlich genug anspricht, um das Ansaugen von Luft auch bei starken Schräglagen zuverlässig zu vermeiden.The present invention is therefore based on the object of providing an oil intake system which avoids the disadvantages mentioned above and which responds particularly sensitively enough to reliably avoid the intake of air even in the case of strong inclined positions.
Diese Aufgabe wird durch ein Ölansaugsystem mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Ausführungsformen sind in den Unteransprüchen beschrieben.This object is achieved by an oil intake system with the features of claim 1. Advantageous embodiments are described in the subclaims.
Erfindungsgemäß weist das Ölansaugsystem mindestens drei Olansaugrohre mit mindestens vier Ansaugköpfen auf, die über ein Saugrohr mit' der Ölpumpe verbunden sind und die in der Ölwanne derart angeordnet sind, daß bei Schräglage der Brennkraftmaschine das Ansaugen von Luft durch in den Ölansaugrohren angeordnete Regelventile verhindert wird. Dabei sind die Regelventile bei "normaler" horizontaler Lage der Ölwanne geöffnet. Bei extremer Schräglage der Ölwanne hingegen sind lediglich diejenigen Regelventile geöffnet, die mit Öl benetzt sind. Alle übrigen Regelventile bleiben geschlossen. Das Ölansaugsystem gemäß der vorliegenden Erfindung ist bei vorhandenen Brennkraftmaschinen leicht nachrüstbar, indem lediglich die Ölwanne und der Normalsaugkorb zu demontieren sind und letzterer durch das Ölansaugsystem gemäß vorliegender Erfindung zu ersetzen ist . Die Regelung der Regelventile kann mechanisch oder auf andere geeignete Weise erfolgen.According to the invention the Ölansaugsystem least three Olansaugrohre with at least four suction heads on which the oil pump are connected via a suction pipe with 'and which are arranged in the sump such that when the inclined position of the internal combustion engine, the suction is prevented of air through arranged in the Ölansaugrohren control valves. The control valves are open when the oil pan is in the "normal" horizontal position. If the oil pan is extremely inclined, however, only those control valves that are wetted with oil are open. All other control valves remain closed. The oil intake system according to the present invention can easily be retrofitted to existing internal combustion engines, in that only the oil pan and the normal suction basket are to be dismantled and the latter is to be replaced by the oil intake system according to the present invention. The control valves can be regulated mechanically or in another suitable manner.
Dadurch, daß bei der vorliegenden Erfindung die Regelventile unter Schwerkraft verschiebbar an Verschiebestangen angeordnete Ventilplatten und an den Rohrenden angeordnete Ventilsitze aufweisen, wird eine einfache, aber dennoch empfindlich ansprechende mechanische Schwerkraftregelung der Ventile realisiert. Neben den gewünschten automatischen Öffnungs- und Schließpositionen der Regelventile, je nach Schräglage, weist diese Schwerkraftregelung auch eine "fail-safe" -Funktion auf, da ein gleichzeitiges Schließen aller Ventile durch die Anordnung zweier Ventilplatten an einer gemeinsamen Verschiebestange sicher verhindert wird.The fact that, in the present invention, the control valves are displaceable under gravity on valve bars arranged on slide rods and valve seats arranged on the tube ends, makes a simple but nevertheless sensitive mechanical response Gravity control of the valves implemented. In addition to the desired automatic opening and closing positions of the control valves, depending on the inclined position, this gravity control also has a "fail-safe" function, since simultaneous closing of all valves is reliably prevented by arranging two valve plates on a common slide rod.
Eine vorteilhafte Ausführungsform der Erfindung sieht vor, daß drei Olansaugrohre H-förmig angeordnet sind und die beiden Seitenrohre je zwei Ansaugköpfe aufweisen. Durch diese Anordnung wird sichergestellt, daß in jeder Kipplage zumindest an einer Ecke der Ölwanne genügend Öl vorhanden ist, um ein Ansaugen von Öl ohne Luft sicherzustellen. Das Saugrohr kann dabei beispielsweise mittig über einen Flansch mit dem Verbindungsrohr zwischen den beiden Seitenrohren angeordnet sein.An advantageous embodiment of the invention provides that three oil suction pipes are arranged in an H-shape and the two side pipes each have two suction heads. This arrangement ensures that there is sufficient oil in each tilt position at least at one corner of the oil pan to ensure that oil is sucked in without air. The suction pipe can be arranged, for example, centrally over a flange with the connecting pipe between the two side pipes.
Weitere vorteilhafte Ausführungsformen des erfindungs- gemäßen Ölansaugsystems können durch die X-, Z- oder viereckfδrmige Anordnung der Olansaugrohre gebildet werden. Wichtig ist dabei jeweils, daß an allen Ecken der Ölwanne, in denen sich bei Schräglagen der Ölspiegel sammeln kann, zumindest ein Ansaugkopf vorhanden ist. Je nach Formgebung der Ölwanne kann dies beispielsweise auch durch eine dreieckige, mehreckige oder sternförmige Anordnung der Olansaugrohre möglich sein.Further advantageous embodiments of the oil intake system according to the invention can be formed by the X, Z or square arrangement of the oil intake pipes. It is important in each case that there is at least one suction head at all corners of the oil pan, in which the oil level can collect in the case of inclined positions. Depending on the shape of the oil pan, this can also be possible, for example, through a triangular, polygonal or star-shaped arrangement of the oil intake pipes.
Eine weitere vorteilhafte Ausführungsform der vorliegenden Erfindung sieht vor, daß die Ansaugköpfe eine gegen den Wannenboden gerichtete Ansaugöffnung aufweisen. Ohne eine derartige konstruktive Ausgestaltung müßte, um keine Luft zu saugen, ein Mindestölpegel von der Größe des Rohrdurchmessers vorhanden sein. Ein noch tieferer Ölpegel wird erst mit den unten liegenden Ölansaugöffnungen gemäß der vorteilhaften Ausführungsform möglich. Ferner ist es vorteilhaft, daß an den Ansaugköpfen Filtersiebe angeordnet sind. Hierdurch wird das Ansaugen von im Ölsumpf vorhandenen Verunreinigungen verhindert.A further advantageous embodiment of the present invention provides that the suction heads have a suction opening directed towards the tub floor. Without such a design, a minimum oil level of the size of the pipe diameter would have to be present in order not to suck in air. An even lower oil level is only possible with the oil intake openings below according to the advantageous embodiment. It is also advantageous that filter screens are arranged on the suction heads. This prevents the contamination in the oil sump from being sucked in.
Schließlich sieht eine vorteilhafte Ausführungsform vor, daß ein Rückschlagventil am Übergang zwischen Saugrohr und Ölpumpensitz angeordnet ist, um das Leerlaufen des Saugrohr- und Pumpenraumes bei Motorstillstand zu verhindern.Finally, an advantageous embodiment provides that a check valve is arranged at the transition between the intake manifold and the oil pump seat in order to prevent the intake manifold and pump chamber from running dry when the engine is at a standstill.
Ein Ausführungsbeispiel der vorliegenden Erfindung wird im folgenden anhand der beigefügten Zeichnungen beschrieben. Darin zeigen:An embodiment of the present invention is described below with reference to the accompanying drawings. In it show:
Fig. 1 eine schematische Draufsicht auf einFig. 1 is a schematic plan view of a
Ölansaugsystem gemäß der vorliegenden Erfindung imOil intake system according to the present invention in
Schnitt; Fig. 2 eine schematische Seitenansicht aus Richtung A-A in Fig. 1 im Schnitt, wobei sich die Ölwanne in horizontaler Lage befindet und Fig. 3 eine Ansicht gemäß Fig. 2, jedoch bei gekippterCut; Fig. 2 is a schematic side view from the direction A-A in Fig. 1 in section, wherein the oil pan is in a horizontal position and Fig. 3 is a view according to Fig. 2, but with tilted
Ölwanne .Oil pan.
In Fig. 1 ist eine Ausführungsform eines erfindungsgemäßen Ölansaugsystems dargestellt, welches in eine Ölwanne 24 eingebaut ist. Die Ölwanne 24 befindet sich dabei in einer Schräglage, so daß der Ölspiegel Sl lediglich den Ansaugkopf 19 des Rohres 28 umspült. Das H-förmig ausgebildete Ölansaugsystem besteht insgesamt aus drei Ölansaugrohren 26, 27, 28, die jeweils eine axialverschieblich gelagerte Verschiebestange 1, 2, 3 aufweisen, an deren beiden Enden jeweils Ventilplatten 4, 5, 6, 7, 8, 9 angeordnet sind. In der dargestellten Lage sind die Ventile des Ölansaugrohrs 27 geöffnet, obwohl sie nicht ölbenetzt sind. Um ein Ansaugen von Luft zu verhindern ist das aus Ventilplatte 4 und Ventilsitz 30 gebildete Ventil des Rohrs 26 geschlossen und das am anderen Ende der Verschiebestange angeordnete aus Ventilplatte 5 und Ventilsitz 31 gebildete Ventil geöffnet. Die Ventilstange 1 ist dabei über die Axiallager 10, 11 axial verschiebbar gelagert. Das Olansaugrohr 28 weist, wie bereits erwähnt, das geöffnete durch Ventilplatte 8 und Ventilsitz 34 gebildete Regelventil sowie das durch Ventilplatt 9 und Ventilsitz 35 gebildete geschlossene Regelventil auf. Beide Ventilplatten 8, 9 sind über die axial verschiebbare Verschiebestange 3 verbunden, die in den Lagern 14, 15 beweglich gelagert ist. Die beiden Seitenrohre 27, 28 weisen weiter Filtersiebe 20, 21, 22, 23 auf. Ferner sind die Lager 12, 13 der Verschiebestange 2 im Rohr 27 dargestellt. An den Enden der Verschiebestange 2 sind Ventilplatten 6, 7 mit den Ventilsitzen 32, 33 angeordnet .1 shows an embodiment of an oil intake system according to the invention, which is installed in an oil pan 24. The oil pan 24 is in an inclined position so that the oil level S1 only flows around the suction head 19 of the tube 28. The H-shaped oil intake system consists of a total of three oil intake pipes 26, 27, 28, each of which has an axially displaceably mounted shift rod 1, 2, 3, at the two ends of which valve plates 4, 5, 6, 7, 8, 9 are arranged. In the position shown, the valves of the oil intake pipe 27 are open, although they are not oil-wetted. To suck in air too prevent the valve of the tube 26 formed from the valve plate 4 and the valve seat 30 is closed and the valve formed from the valve plate 5 and the valve seat 31 arranged at the other end of the slide rod is opened. The valve rod 1 is axially displaceably supported by the axial bearings 10, 11. As already mentioned, the oil suction pipe 28 has the open control valve formed by valve plate 8 and valve seat 34 and the closed control valve formed by valve plate 9 and valve seat 35. Both valve plates 8, 9 are connected via the axially displaceable sliding rod 3, which is movably mounted in the bearings 14, 15. The two side tubes 27, 28 also have filter screens 20, 21, 22, 23. Furthermore, the bearings 12, 13 of the slide rod 2 in the tube 27 are shown. At the ends of the slide rod 2, valve plates 6, 7 with the valve seats 32, 33 are arranged.
Der Ölfluß ist in Fig. 1 durch die Pfeile 36 dargestellt. Weiter ist in Fig. 1 die Austrittsöffnung 29 dargestellt, die mittig auf der Oberseite des Saugrohrs 26 angeordnet ist und mit dem nicht gezeigten Saugrohr 43 zur ebenfalls nicht gezeigten Ölpumpe 45 verbunden ist. In der dargestellten Schräglage bewegen sich die Ventilplatten 5 und 8 aufgrund der Schwerkraft in ihre geöffnete Stellung, wobei die Ventilplatten 4 und 9 über die Verschiebestangen 1 und 3 in ihre geschlossene Position verschoben werden. Hierdurch wird sichergestellt, daß in dem nun lediglich am Ansaugkopf 19 offenen Ansaugsystem keine Luft angesaugt wird. Die Position der Ventile im Olansaugrohr 27 ist in der in Fig. 1 dargestellten Schräglage unbeachtlich, da das Rohr 27 völlig durch die geschlossene Ventilplatte 4 vom übrigen Ölansaugsystem und damit insbesondere von der Austrittsöffnung 29 abgekoppelt ist. Fig. 2 zeigt schematisch das Ölansaugsystem aus Fig. 1 in einem seitlichen Schnitt, wobei sich die am Kurbelgehäuse 52 befestigte Ölwanne 24 in horizontaler Position befindet, d.h. der Ölspiegel S2 ist parallel zum Wannenboden 40. In dieser Position sind die Ventilplatten 4, 5 des Rohrs 26 beide geöffnet, d.h. von den Ventilsitzen 30, 31 abgehoben. Die über Flansche 25 mit Rohr 26 verbundenen Rohre 27 und 28 sowie die Verschiebestangen 2, 3 sind im Schnitt dargestellt. Auch in den beiden Seitenrohren 27, 28 sind beide Ventile geöffnet, so daß über alle vier Ansaugköpfe 16, 17, 18, 19 Öl angesaugt wird. Zwischen dem Kurbelgehäuse 52 und der Ölwanne 24 ist ferner eine Tragplatte 41 befestigt, die mehrere Öffnungen 42 besitzt, die einen ungehinderten Oldurchfluß gestatten. In der Mitte weist die Platte 41 ein Saugrohr 43 für eine Ölförderpumpe 45, dargestellungsgemäß eine Zahnradpumpe auf, deren Gehäuse auf der Platte 41 befestigt ist. Das von der Pumpe 45 zu den Verbrauchstellen der Maschine geförderte Öl geht in ein Druckrohr 46. Das Saugrohr 43 ist am unteren Ende als Flansch 44 ausgebildet, der zur Befestigung eines langgestreckten, zum Boden 40 der Wanne 24 parallel angeordneten, hohlen und zylindrischen Rohrs 26 dient. Das Rohr 26 besitzt zu diesem Zweck einen Befestigungsflansch 49. Im Inneren des Flansches 44 ist an einem Stift 50 ein kippbares Plattenventil 51 vorgesehen, das in Ruhestellung der Maschine am Flansch 49 dichtend aufliegt und den Rückfluß des Öls aus dem Saugrohr 43 und der Pumpe 45 verhindert. Im Rohr 26 ist eine Verschiebestange 1 achsparallel verschiebbar gelagert. Um die erforderliche Leichtgängigkeit der Stange 1 während ihrer Verschiebebewegung zu sichern, sind zwei Lager 10, 11, z.B. Kugellager, in zwei durchlöcherten Querflanschen 47, 48 des Rohrs 26 vorgesehen. Die Stange 1 trägt an jedem Ende eine ebene Ventilplatte 4, 5, die jeweils mit einer als Ventilsitz 30, 31 ausgebildeten Ringfläche an jedem Ende des Rohrs 26 zusammenarbeitet. Fig. 3 zeigt das Ölansaugsystem gemäß Fig. 2, jedoch in gekippter Lage, so daß der Ölspiegel S3 in der rechten unteren Ecke liegt. Dies ist beispielsweise dann gegeben, wenn ein Fahrzeug einen steilen Hang hinauffährt und die Ölwanne 24 eine etwa im Winkel von 45° zur Waagrechten geneigte Stellung einnimmt. Das Öl sammelt sich in der rechten unteren Ecke der Ölwanne 24, wobei der Ölspiegel S3 wiederum waagerecht liegt. Die Stange 1 nimmt unter Einwirkung der Schwerkraft die in Fig. 2 dargestellte Lage ein, in welcher die Ventilplatte 5 vom Ventilsitz 31 wegbewegt ist und der Ölzulauf zur Pumpe 45 über das in Öl voll eingetauchte Rohr 28 und die daran angeordneten Ansaugköpfe 18, 19 erfolgt. Die Ölpumpe 45 kann auch in dieser extremen Schräglage eines Fahrzeuges und damit auch der Ölwanne 24 der Brennkraftmaschine keine Luft, sondern nur Öl ansaugen. The oil flow is shown in Fig. 1 by the arrows 36. 1 also shows the outlet opening 29, which is arranged centrally on the upper side of the suction pipe 26 and is connected to the suction pipe 43, not shown, for the oil pump 45, also not shown. In the inclined position shown, the valve plates 5 and 8 move into their open position due to the force of gravity, the valve plates 4 and 9 being displaced into their closed position via the push rods 1 and 3. This ensures that no air is sucked into the suction system, which is now only open on the suction head 19. The position of the valves in the oil suction pipe 27 is irrelevant in the inclined position shown in FIG. 1, since the pipe 27 is completely decoupled from the rest of the oil suction system and thus in particular from the outlet opening 29 by the closed valve plate 4. Fig. 2 shows schematically the oil intake system of Fig. 1 in a lateral section, the oil pan 24 attached to the crankcase 52 being in a horizontal position, ie the oil level S2 is parallel to the pan bottom 40. In this position the valve plates 4, 5 of the Tube 26 both opened, ie lifted off the valve seats 30, 31. The pipes 27 and 28 connected to pipe 26 via flanges 25 and the connecting rods 2, 3 are shown in section. Both valves are also open in the two side tubes 27, 28, so that oil is sucked in via all four suction heads 16, 17, 18, 19. Between the crankcase 52 and the oil pan 24, a support plate 41 is also attached, which has a plurality of openings 42 which allow unimpeded oil flow. In the middle, the plate 41 has a suction pipe 43 for an oil pump 45, according to the illustration a gear pump, the housing of which is fastened on the plate 41. The oil pumped by the pump 45 to the points of consumption of the machine goes into a pressure pipe 46. The suction pipe 43 is designed at the lower end as a flange 44, which is used to fasten an elongated, hollow and cylindrical pipe 26 arranged parallel to the bottom 40 of the tub 24 serves. The pipe 26 has a fastening flange 49 for this purpose. Inside the flange 44, a tiltable plate valve 51 is provided on a pin 50, which in the rest position of the machine rests on the flange 49 in a sealing manner and the return flow of the oil from the suction pipe 43 and the pump 45 prevented. In the tube 26, a slide rod 1 is axially displaceably mounted. In order to ensure the required smooth movement of the rod 1 during its displacement movement, two bearings 10, 11, for example ball bearings, are provided in two perforated transverse flanges 47, 48 of the tube 26. The rod 1 carries a flat valve plate 4, 5 at each end, which cooperates with an annular surface designed as a valve seat 30, 31 at each end of the tube 26. Fig. 3 shows the oil intake system of FIG. 2, but in a tilted position, so that the oil level S3 is in the lower right corner. This is the case, for example, when a vehicle drives up a steep slope and the oil pan 24 assumes a position inclined approximately at an angle of 45 ° to the horizontal. The oil collects in the lower right corner of the oil pan 24, the oil level S3 in turn lying horizontally. Under the action of gravity, the rod 1 assumes the position shown in FIG. 2, in which the valve plate 5 is moved away from the valve seat 31 and the oil supply to the pump 45 takes place via the tube 28 fully immersed in oil and the suction heads 18, 19 arranged thereon . Even in this extreme inclined position of a vehicle and thus also the oil pan 24 of the internal combustion engine, the oil pump 45 cannot suck in air, but only oil.

Claims

AnsprücheExpectations
Ölansaugsystem für eine Brennkraftmaschine, insbesondere einen Einzylinder-Dieselmotor, der eine Ölwanne und eine Ölpumpe aufweist, wobei das Ansaugsystem mindestens drei Olansaugrohre mit mindestens vier Ansaugköpfen aufweist, die über ein Saugrohr mit der Ölpumpe verbunden sind und die in der Ölwanne derart angeordnet sind, daß bei Schräglage der Brennkraftmaschine das Ansaugen von Luft durch den Ölansaugrohren zugeordnete Regelventile verhindert wird, und wobei die Regelventile durch unter Schwerkraft verschiebbare Verschiebestangen (1, 2, 3) betätigt werden, dadurch gekennzeichnet, daß die Regelventile Ventilplatten (4, 5, 6, 7, 8, 9) umfassen, die mit an den Rohrenden angeordneten Ventilsitzen (30, 31, 32, 33, 34, 35) zusammenwirken.Oil intake system for an internal combustion engine, in particular a single-cylinder diesel engine, which has an oil pan and an oil pump, the intake system having at least three oil intake pipes with at least four intake heads, which are connected to the oil pump via an intake pipe and which are arranged in the oil pan in such a way that when the internal combustion engine is in an inclined position, the suction of air is prevented by control valves assigned to the oil intake pipes, and the control valves are actuated by sliding rods (1, 2, 3) which can be moved under gravity, characterized in that the control valves have valve plates (4, 5, 6, 7 , 8, 9) which cooperate with valve seats (30, 31, 32, 33, 34, 35) arranged on the tube ends.
Ölansaugsystem nach Anspruch 1, dadurch gekennzeichnet, daß drei Olansaugrohre (26, 27, 28) H-förmig angeordnet sind und die beiden Seitenrohre (27, 28) je zwei Ansaugköpfe (16, 17, 18, 19) aufweisen.Oil intake system according to claim 1, characterized in that three oil intake pipes (26, 27, 28) are arranged in an H-shape and the two side pipes (27, 28) each have two intake heads (16, 17, 18, 19).
Ölansaugsystem nach Anspruch 1, dadurch gekennzeichnet, daß die Olansaugrohre X-, Z- oder viereckförmig angeordnet sind.Oil intake system according to claim 1, characterized in that the oil intake pipes are arranged in an X, Z or square shape.
Ölansaugsystem nach Anspruch 1, dadurch gekennzeichnet, daß die Ansaugköpfe (16, 17, 18, 19) eine gegen denOil intake system according to claim 1, characterized in that the intake heads (16, 17, 18, 19) one against the
Wannenboden (40) gerichtete Ansaugöffnung aufweisen. Trough bottom (40) have directed suction opening.
5. Ölansaugsystem nach Anspruch 1, dadurch gekennzeichnet, daß an den Ansaugköpfen (16, 17, 18, 19) Filtersiebe (20, 21, 22, 23) angeordnet sind.5. Oil intake system according to claim 1, characterized in that on the suction heads (16, 17, 18, 19) filter screens (20, 21, 22, 23) are arranged.
6. Ölansaugsystem nach Anspruch 1, dadurch gekennzeichnet, daß ein Rückschlagventil (29, 51) zwischen Saugrohr und Ölpumpe angeordnet ist, um das Leerlaufen des Saugrohr- und Pumpenraums bei Motorstillstand zu verhindern. 6. Oil intake system according to claim 1, characterized in that a check valve (29, 51) is arranged between the intake manifold and oil pump to prevent the intake pipe and pump chamber from running dry when the engine is at a standstill.
EP99967005A 1998-12-28 1999-12-23 Oil pickup system for an internal combustion engine, notably a single-cylinder diesel engine Expired - Lifetime EP1058777B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19860381 1998-12-28
DE19860381A DE19860381A1 (en) 1998-12-28 1998-12-28 Oil intake system for an internal combustion engine, in particular a single-cylinder diesel engine
PCT/EP1999/010361 WO2000039436A1 (en) 1998-12-28 1999-12-23 Oil pickup system for an internal combustion engine, notably a single-cylinder diesel engine

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EP1058777A1 true EP1058777A1 (en) 2000-12-13
EP1058777B1 EP1058777B1 (en) 2004-10-13

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US (1) US6260534B1 (en)
EP (1) EP1058777B1 (en)
JP (1) JP2002533611A (en)
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WO (1) WO2000039436A1 (en)

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JP2002533611A (en) 2002-10-08
DE19860381A1 (en) 2000-06-29
DE59910839D1 (en) 2004-11-18
US6260534B1 (en) 2001-07-17
EP1058777B1 (en) 2004-10-13
WO2000039436A1 (en) 2000-07-06

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