DE102004012726A1 - Pressure regulator for automotive oil pump has first piston operating in conjunction with a second variable-pressure piston - Google Patents

Pressure regulator for automotive oil pump has first piston operating in conjunction with a second variable-pressure piston Download PDF

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Publication number
DE102004012726A1
DE102004012726A1 DE200410012726 DE102004012726A DE102004012726A1 DE 102004012726 A1 DE102004012726 A1 DE 102004012726A1 DE 200410012726 DE200410012726 DE 200410012726 DE 102004012726 A DE102004012726 A DE 102004012726A DE 102004012726 A1 DE102004012726 A1 DE 102004012726A1
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Germany
Prior art keywords
oil pump
pressure
piston
control
oil
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.)
Withdrawn
Application number
DE200410012726
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German (de)
Inventor
Dieter Voigt
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE200410012726 priority Critical patent/DE102004012726A1/en
Priority to EP04799011A priority patent/EP1730405A1/en
Priority to JP2006543638A priority patent/JP2007514097A/en
Priority to US10/581,148 priority patent/US20070111855A1/en
Priority to PCT/IB2004/003910 priority patent/WO2005057013A1/en
Publication of DE102004012726A1 publication Critical patent/DE102004012726A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
    • F04C14/185—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by varying the useful pumping length of the cooperating members in the axial direction
    • 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
    • F01M1/16—Controlling lubricant pressure or quantity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms

Abstract

An automotive engine has an oil pump with a speed-dependent pressure regulator. The pressure regulator is a first piston (1) operating in conjunction with a differential pressure piston (20) that delivers a variable additional force via a radial bore (26) of a rotating oil pump delivery wheel.

Description

Durch die Verwendung von Ölpumpen mit veränderlichen Fördermengen, sog. Regelölpumpen, für die Schmierölversorgung von Verbrennungsmotoren werden aufgrund reduzierter Ölpumpenantriebsleistungen Vorteile im Kraftstoffverbrauch erzielt.By the use of oil pumps with changeable Flow rates, so-called control oil pumps, for the lubricating oil supply Internal combustion engines are due to reduced oil pump drive performance Benefits in fuel consumption achieved.

Die deutsche Patentanmeldung DE 10237801 A1 beschreibt eine Außenzahnrad-Regelölpumpe, bei der eine die Fördermengenverstellung vornehmende Verschiebeeinheit die axiale Eingriffsbreite der beiden Förderzahnräder variiert. Die Verschiebeeinheit ist einerseits ständig mit Öldruck beaufschlagt, während andererseits eine Rückstellfeder wie auch ein in der zugehörigen Federkammer wirkender Regeldruck entgegenwirken. Der Regeldruck wird von einem Regelkolben so eingestellt, dass der Öldruck eines mit Schmieröl zu versorgenden Verbrennungsmotors beispielsweise drehzahlabhängig ansteigt.The German patent application DE 10237801 A1 describes an external gear control oil pump in which a flow rate adjustment undertaking displacement unit varies the axial engagement width of the two conveyor gears. The displacement unit is on the one hand constantly subjected to oil pressure, while on the other hand counteract a return spring as well as acting in the associated spring chamber control pressure. The control pressure is adjusted by a control piston so that the oil pressure of an engine to be supplied with lubricating oil, for example, increases speed-dependent.

Während die bei niedrigen Betriebsrehzahlen auf einen niedrigen Öldruck eingeregelte Regelölpumpe eine geringe Ölpumpenantriebsleistung mit entsprechenden Vorteilen im Kraftstoffverbrauch des Verbrennungsmotors aufweist, kann jedoch dieser niedrige Öldruck in bestimmten Betriebssituationen, beispielsweise bei einer erforderlich schnellen Verstellung eines hydraulischen Nockenwellenverstellers zur Veränderung der Motorsteuerzeiten, Funktionsnachteile verursachen.While the controlled at low operating speeds to a low oil pressure Usually oil pump a low oil pump drive power with corresponding advantages in the fuel consumption of the internal combustion engine However, this low oil pressure in certain operating situations, for example at a required rapid adjustment of a hydraulic Camshaft adjuster for modification engine timing, cause functional disadvantages.

Der Erfindung liegt die Aufgabe zugrunde, für eine Regelölpumpe mit veränderlicher Fördermenge bei Bedarf eine einfache und schnelle Fördermengenanhebung zur Öldruckerhöhung zu ermöglichen.Of the Invention is based on the object for a control oil pump variable Flow rate at Need a simple and fast flow rate increase for oil pressure increase enable.

Diese Aufgabe wird erfindungsgemäß in einfacher Weise dadurch gelöst, dass der auf die Fördermengenverstelleinrichtung der Regelölpumpe wirkende Öldruck abgeschaltet werden kann, so dass die Rückstellfeder der Fördermengenverstelleinrichtung diese dann in die Position der maximalen Ölpumpenfördermenge stellt und hierdurch eine Öldruckerhöhung bewirkt.These The object is achieved according to the invention in a simple Way solved by that on the Fördermengenverstelleinrichtung the regular oil pump acting oil pressure can be turned off, so that the return spring of the flow rate adjustment this then puts in the position of the maximum oil pump delivery and thereby causes an increase in oil pressure.

Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung des in der 1 dargestellten Ausführungsbeispiels.Details of the invention will become apparent from the following description of the in the 1 illustrated embodiment.

Die 1 zeigt als bevorzugtes Ausführungsbeispiel der Erfindung eine Außenzahnrad-Regelölpumpe. Ein Ölpumpengehäuse 1 weist ein erstes Förderzahnrad 2 mit einer Antriebswelle 3 auf, die im Gehäusedeckel 4 gelagert ist.The 1 shows a preferred embodiment of the invention, an external gear oil pump. An oil pump housing 1 has a first conveyor gear 2 with a drive shaft 3 on that in the case cover 4 is stored.

Ein mit dem Förderzahnrad 2 in Zahneingriff stehendes, zweites Förderzahnrad 5 ist auf einem Laufbolzen 6 gelagert, auf den einerseits ein Verschiebekolben 7 und andererseits ein Federkolben 8 aufgepresst sind. Dieser Verbund wird als Verschiebeeinheit 9 bezeichnet. Die axial veränderliche Positionierung der Verschiebeeinheit 9 bestimmt über die resultierende Eingriffsüberdeckung der beiden Förderzahnräder 2 und 5 die Fördermenge der Regelölpumpe.One with the conveyor gear 2 in meshed, second conveyor gear 5 is on a bolt 6 stored, on the one hand a displacement piston 7 and on the other hand, a spring piston 8th are pressed on. This composite is called a displacement unit 9 designated. The axially variable positioning of the displacement unit 9 determined by the resulting engagement overlap of the two conveyor gears 2 and 5 the flow rate of the control oil pump.

Die axiale Position der Verschiebeeinheit 9 ist einerseits von der Kraft einer am Federkolben 8 anliegenden Rückstellfeder 10 sowie von beidseitig auf die Verschiebeeinheit 9 wirkenden Drücken abhängig. Während eine den Verschiebekolben 7 aufnehmende Kammer 11 über eine Leitung 12 direkt von dem den Verbrennungsmotor versorgenden Öldruck beaufschlagt ist, wirkt in einer die Rückstellfeder 10 und den Federkolben 8 aufnehmenden Federkammer 13 ein bestimmter Regeldruck, der von einem Regelkolben 14 in bekannter Weise erzeugt wird.The axial position of the displacement unit 9 is on the one hand by the force of a spring piston 8th adjacent return spring 10 as well as on both sides of the displacement unit 9 depending on the effective pressures. While one the displacement piston 7 receiving chamber 11 over a line 12 is acted upon directly by the oil pressure supplying the internal combustion engine, acts in a return spring 10 and the spring piston 8th receiving spring chamber 13 a certain control pressure, that of a control piston 14 is generated in a known manner.

Erfindungsgemäß ist in der Leitung 12 ein Magnetventil 15 angeordnet, dass bei aktivem Regelungsbetrieb der Regelölpumpe den Öldruck in die Kammer 11 durchschaltet. Bei der in 1 gezeigten Eingriffsbreite der beiden Förderzahnräder 2 und 5 und dadurch entsprechend reduzierter Ölfördermenge stellt sich beispielsweise bei einer niedrigen Betriebsdrehzahl ein Öldruck von 2 bar ein. Bei einem erhöhten Öldruckbedarf des Verbrennungsmotors wird das Magnetventil 15 von dem Steuergerät des Verbrennungsmotors bestromt, so dass dann die Kammer 11 anstelle der Öldruckbeaufschlagung eine Druckentlastung erfährt. Die Verschiebeeinheit 9 bewegt sich durch die Kraft der Rückstellfeder 10 in eine Position bei vollständiger Eingriffsüberdeckung der beiden Förderzahnräder 2 und 5, was durch die resultierende Ölfördermengenerhöhung zu einem Öldruckanstieg führt. Ein Überdruckventil 16 begrenzt den nun erhöhten Öldruck der inaktiven Öldruckregelung der Regelölpumpe auf ein maximal zulässiges Druckniveau von beispielsweise 5 bar.According to the invention is in the line 12 a solenoid valve 15 arranged that in active control mode of the control oil pump the oil pressure in the chamber 11 turns on. At the in 1 shown engagement width of the two conveyor gears 2 and 5 and thus correspondingly reduced oil flow rate, for example, sets at a low operating speed, an oil pressure of 2 bar. At an increased oil pressure demand of the internal combustion engine, the solenoid valve 15 energized by the control unit of the internal combustion engine, so that then the chamber 11 instead of the Öldruckbeaufschlagung experiences a pressure relief. The displacement unit 9 moves by the force of the return spring 10 in a position with complete engagement overlap of the two conveyor gears 2 and 5 , which leads to an increase in oil pressure due to the resulting increase in oil flow. A pressure relief valve 16 limits the now increased oil pressure of the inactive oil pressure control of the control oil pump to a maximum allowable pressure level, for example, 5 bar.

Die erfindungsgemäße Anordnung eines Magnetventils zur Abschaltung der Öldruckwirkung auf die Fördermengenverstelleinrichtung der Regelölpumpe eines Verbrennungsmotors ermöglicht bei Bedarf eine schnelle Öldruckanhebung.The inventive arrangement a solenoid valve for switching off the oil pressure effect on the Fördermengenverstelleinrichtung the regular oil pump an internal combustion engine allows If necessary, a fast oil pressure increase.

Claims (2)

Öldruckregelung für eine Regelölpumpe mit einer von Öldruck beaufschlagten Fördermengenverstelleinrichtung für die Schmierölversorgung von Verbrennungsmotoren, dadurch gekennzeichnet, dass die Öldruckbeaufschlagung der Fördermengenverstelleinrichtung (9) von einem Magnetventil (15) zur Öldruckerhöhung der Regelölpumpe abgeschaltet werden kann.Oil pressure control for a control oil pump with a flow rate adjustment device for the lubricating oil supply from Ver internal combustion engines, characterized in that the Öldruckbeaufschlagung the Fördermengenverstelleinrichtung ( 9 ) from a solenoid valve ( 15 ) can be switched off to the oil pressure increase of the control oil pump. Öldruckregelung für eine Regelölpumpe nach Anspruch 1, dadurch gekennzeichnet, dass der Öldruck der Regelölpumpe von einem Überdruckventil (16) begrenzt ist.Oil pressure control for a control oil pump according to claim 1, characterized in that the oil pressure of the control oil pump from a pressure relief valve ( 16 ) is limited.
DE200410012726 2003-12-10 2004-03-16 Pressure regulator for automotive oil pump has first piston operating in conjunction with a second variable-pressure piston Withdrawn DE102004012726A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE200410012726 DE102004012726A1 (en) 2004-03-16 2004-03-16 Pressure regulator for automotive oil pump has first piston operating in conjunction with a second variable-pressure piston
EP04799011A EP1730405A1 (en) 2003-12-10 2004-11-29 Engine speed-dependent pressure regulation of oil pumps
JP2006543638A JP2007514097A (en) 2003-12-10 2004-11-29 Oil pump speed dependent pressure control
US10/581,148 US20070111855A1 (en) 2003-12-10 2004-11-29 Engine speed-dependent pressure regulation of oil pumps
PCT/IB2004/003910 WO2005057013A1 (en) 2003-12-10 2004-11-29 Engine speed-dependent pressure regulation of oil pumps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200410012726 DE102004012726A1 (en) 2004-03-16 2004-03-16 Pressure regulator for automotive oil pump has first piston operating in conjunction with a second variable-pressure piston

Publications (1)

Publication Number Publication Date
DE102004012726A1 true DE102004012726A1 (en) 2005-10-06

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DE200410012726 Withdrawn DE102004012726A1 (en) 2003-12-10 2004-03-16 Pressure regulator for automotive oil pump has first piston operating in conjunction with a second variable-pressure piston

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DE (1) DE102004012726A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006018124A1 (en) * 2006-04-19 2007-10-25 Schwäbische Hüttenwerke Automotive GmbH & Co. KG Adjustable rotary pump with wear reduction
DE102008006861A1 (en) 2008-01-31 2008-12-11 Voigt, Dieter, Dipl.-Ing. Pressure changeover switch, especially for regulating combustion engine lubrication system oil pump, has control pressure line with first choke, branch line to pressure sink with second choke and/or control device with adjustable throughput
DE102007039589A1 (en) * 2007-08-22 2009-02-26 Voigt, Dieter, Dipl.-Ing. Regular oil pump with adjustment-dependent oil pressure control
WO2009095011A2 (en) * 2008-01-31 2009-08-06 Dieter Voigt Pressure switching configuration for oil pumps
DE102010004594A1 (en) 2010-01-14 2011-07-21 Audi Ag, 85057 Standard oil pump has pump casing, two promotion gear wheels combing with one another, and shift unit to control oil pressure or delivery rate of pump

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006018124A1 (en) * 2006-04-19 2007-10-25 Schwäbische Hüttenwerke Automotive GmbH & Co. KG Adjustable rotary pump with wear reduction
US8186982B2 (en) 2006-04-19 2012-05-29 Schwabische Huttenwerke Automotive Gmbh & Co. Kg Adjustable rotary pump with reduced wear
US8770955B2 (en) 2006-04-19 2014-07-08 Schwabische Huttenwerke Automotive Gmbh Adjustable rotary pump with reduced wear
DE102007039589A1 (en) * 2007-08-22 2009-02-26 Voigt, Dieter, Dipl.-Ing. Regular oil pump with adjustment-dependent oil pressure control
DE102008006861A1 (en) 2008-01-31 2008-12-11 Voigt, Dieter, Dipl.-Ing. Pressure changeover switch, especially for regulating combustion engine lubrication system oil pump, has control pressure line with first choke, branch line to pressure sink with second choke and/or control device with adjustable throughput
WO2009095011A2 (en) * 2008-01-31 2009-08-06 Dieter Voigt Pressure switching configuration for oil pumps
WO2009095011A3 (en) * 2008-01-31 2009-12-10 Dieter Voigt Pressure switching configuration for oil pumps
DE102010004594A1 (en) 2010-01-14 2011-07-21 Audi Ag, 85057 Standard oil pump has pump casing, two promotion gear wheels combing with one another, and shift unit to control oil pressure or delivery rate of pump
DE102010004594B4 (en) * 2010-01-14 2017-05-24 Audi Ag Usually oil pump

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