DE102009025535A1 - Lubricant pump e.g. interior or external gear pumps for use in internal-combustion engine, has switch element pressed against drive shaft in friction fit and form fit manner during subjecting pressure chamber with lubricant pressure - Google Patents

Lubricant pump e.g. interior or external gear pumps for use in internal-combustion engine, has switch element pressed against drive shaft in friction fit and form fit manner during subjecting pressure chamber with lubricant pressure

Info

Publication number
DE102009025535A1
DE102009025535A1 DE102009025535A DE102009025535A DE102009025535A1 DE 102009025535 A1 DE102009025535 A1 DE 102009025535A1 DE 102009025535 A DE102009025535 A DE 102009025535A DE 102009025535 A DE102009025535 A DE 102009025535A DE 102009025535 A1 DE102009025535 A1 DE 102009025535A1
Authority
DE
Germany
Prior art keywords
lubricant
pump
pressure
combustion engine
drive shaft
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.)
Pending
Application number
DE102009025535A
Other languages
German (de)
Inventor
Markus Huber
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
Original Assignee
Bayerische Motoren Werke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Priority to DE102009025535A priority Critical patent/DE102009025535A1/en
Publication of DE102009025535A1 publication Critical patent/DE102009025535A1/en
Application status is Pending legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01MLUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00Pressure lubrication
    • F01M1/16Controlling lubricant pressure or quantity

Abstract

The pump (1) has a suction channel (9) closed by a closure element (13), which is acted upon by spring force of a spring element (12) on one side. A pressure chamber (14) is provided on a side facing away from the spring element and subjected to lubricant pressure (p1). The chamber stays in an operative connection with a switch element (11) in a lubricant-conductive manner. The channel is opened against the force and simultaneously the switch element is pressed against a drive shaft (10) in a friction fit and form fit manner during subjecting the chamber with the lubricant pressure.

Description

  • The The invention relates to a lubricant pump with the features the preamble of claim 1.
  • at Currently located on the market internal combustion engines is under Circumstances the need, depending on the engine architecture the engine lubricant from the cylinder heads or to suck it out of the turbochargers. In so-called dry sump lubrication Occasionally, the crank chamber is additionally sucked off. The need for this is reinforced by the dynamics effects such as As uphill, cornering, etc .. For this are in usually hydraulic fixed displacement pumps, in special cases also used electrically driven suction pumps.
  • The Hydraulic constant-flow pumps can be used, for example, as Internal or external gear pumps are running and are usually always driven, so independent from the real need of suction always the mechanical friction is to raise. Due to the mechanical friction, the entire Friction of the internal combustion engine increases and thereby arise Consumption disadvantages. When using electrically driven pumps also arise consumption disadvantages, depending on the application The electric pumps can be switched on as needed which reduces the consumption penalty. electrical Suction pumps are associated with very high total costs.
  • A generic lubricant pump for an internal combustion engine is, for example, from the German patent application, from which this inven tion emanates, the DE 10 2005 029 086 A1 known. In this, a lubricant pump for an internal combustion engine is described for sucking the located in a lubricant collecting device lubricant, with a lubricant pump housing in which at least two pairs of gears are arranged. To form the pump stages, the gear pairs on the suction side are connected to a suction channel formed in the lubricant pump housing and on the pressure side to a pressure channel. In the DE 10 2005 029 086 A1 It is proposed that in the lubricant pump housing, a lubricant supply channel connected to the suction channel of the first pump stage is integrated, via the lubricant to the suction side of the first pump stage is conveyed.
  • Also on this, known from the prior art lubricant pump for an internal combustion engine, it is disadvantageous that the pump stages run permanently, reducing fuel consumption the internal combustion engine is increased.
  • task the present invention is to show a measure with the for a generic lubricant pump reduces the fuel consumption for the internal combustion engine becomes.
  • These The object is achieved by the features in the characterizing part of the claim 1 solved.
  • The Inventive embodiment of the lubricant pump leads to a reduction of the fuel requirement of the internal combustion engine as well as cost advantages over the use of an electrical Lubricant pump or lubricant suction pump.
  • The Design according to claim 2 allows In addition, advantageously, the active extraction of Lubricant and passive drainage of lubricant from the internal combustion engine via a single supply line.
  • The Embodiments according to the claims 3 to 6 are particularly preferred embodiments, being with the use of a single machine housing when using the drive shaft of the first pump as the drive shaft a particularly compact design is possible.
  • in the The following is the invention with reference to a particularly preferred embodiment explained in more detail in a single figure.
  • 1 shows a section through a lubricant pump according to the invention.
  • 1 shows a schematic section through a lubricant pump according to the invention 1 , The lubricant pump 1 points in a machine housing 2 a first pump 3 and a second pump 6 on. The first and the second pump 3 . 6 are each framed by a dashed line. The first lubricant pump 3 is schematically illustrated as a gear pump, with a first gear ZR1 and a second gear ZR2, wherein the first gear ZR1 on a drive shaft 10 , a driving wedge is not shown figured and the second gear ZR2 on an axis 17 is stored. The second pump 6 is also schematically shown as a gear pump by a third gear ZR3 and a fourth gear ZR4. The third gear ZR3 is also on the axis 17 stored. The fourth gear ZR4 is also on the drive shaft 10 stored. The drive shaft 10 has at one of the fourth gear ZR4 protruding end to a switching element 11 corresponding geometry.
  • The first pump 3 has a first pressure egg th 4 , represented by a cavity, for supplying lubricant to the internal combustion engine with a lubricant pressure P1. In addition, it has a first suction side 5 on, also represented by a cavity, with the lubricant can be sucked on. The second pump 6 has a second pressure side 7 and a second suction side 8th , also each represented by a cavity, on. The second suction side 8th is lubricant leading with a suction channel 9 connected to the suction of lubricant from the internal combustion engine and / or other aggregates such. B. an exhaust gas turbocharger. Next is in the engine case 2 adjacent to the switching element 11 a pressure room 14 provided, which is acted upon by the lubricant pressure P1. This is the first page of printing 4 and the pressure room 14 via a pressure line 18 connectable with each other. The lubricant-carrying pressure line 18 can from a valve 16 , In the present embodiment, a hydraulic valve to be closed, so that in the pressure chamber 14 no lubricant pressure P1 is applied more, but is depressurized.
  • When the first pump 3 Lubricant promotes and thus builds up the lubricant pressure P1, the switching element 11 , with corresponding position of the valve 16 , acted upon by the lubricant pressure P1 and in the direction of the drive shaft 10 pressed, schematically represented by an arrow, and at the same time is the switching element 11 positive fit with the drive shaft 10 connected. This is the second pump 6 via force and / or positive connection between the drive shaft 10 and the switching element 11 can be switched on via the lubricant pressure P1. In this state, ie when the second pump 6 can be operated via the suction channel 9 Lubricant from the internal combustion engine and / or from other aggregates, such. B. be sucked off an exhaust gas turbocharger. The suction channel 9 is beyond a closure element 13 , which with the pressure room 14 Lubricant leading is connected via the lubricant pressure P1 against a spring force of a spring element 12 closable. The closure element 13 is in the present embodiment, a double piston whose function will be explained below.
  • Adjacent to the suction channel 9 is still a drain channel 15 provided with the closure element 13 alternately with the suction channel 9 is closable. The drainage channel 15 serves for a non-pressurized return of lubricant from the internal combustion engine or or exhaust gas turbochargers. This means that when operating the second pump 6 the suction channel 9 is opened so that lubricant can be sucked out of the internal combustion engine, while the flow channel 15 is closed. Will the pressure chamber 14 but not acted upon by the lubricant pressure P1, so that the second pump 6 no lubricant promotes, is the suction channel 9 closed at the same time and the drainage channel 15 open. This constellation makes it possible to use the drainage channel 15 as well as the suction channel 9 in the lubricant conveying direction in front of the closure element 13 form as a common lubricant channel.
  • In other embodiments, the valve 16 also a hydraulic or pneumatic or electric valve 16 be. Preferably, the first and / or the second pump 3 . 6 a vane pump or a gear pump, such. As an internal or an external gear, but other common, known in the art lubricant pumps can be used.
  • In other words, the invention can be implemented as follows:
    From the pressure area, the first pressure side 4 , the first pump 3 the lubricant pressure P1 is removed. If there is a need for suction, then the lubricant pressure P1, for example via a hydraulic control solenoid valve, the switching element 11 in the fourth gear ZR4, the hydraulic suction stage, the second suction side 8th , fed. The pressure P1 generated in the pressure chamber 14 an axial force on the switching element 11 in the fourth gear ZR4 of the second pump 6 , a suction stage. Due to the axial force is on the opposite side of the switching element 11 a frictional and / or positive connection to the drive shaft 10 generated and the suction stage of the second pump 6 begins, due to the frictional and / or positive connection, with the lubricant delivery. The electrical control signal can, for example, be tapped from a characteristic map of an internal combustion engine control system, taking into account signals from the overall vehicle sensor system (inclination, inclination, acceleration, etc.).
  • Through a targeted coordination of the pressure surfaces in the pressure chamber 14 can be set specifically a defined force, which depends on the respective dimensions of the lubricant pump 1 depends. By additional measures on the friction surfaces of the drive shaft 10 and the switching element 11 the transmittable torque can be influenced, possibly also via positive locking.
  • In another, not figuratively not shown embodiment is based on a switching element 11 waived. In this case, the pressure P1 can also be applied directly to the fourth gear ZR4, which is arranged axially displaceable. The torque transmitting frictional engagement is then between the fourth gear ZR4 and the drive shaft 10 shown. However, a disadvantage of this embodiment is an increased axial play requirement.
  • By a suitable choice of material (Alumi nium, RSA ... for the fourth gear ZR4), however, in this embodiment, gap losses, lubricant losses that undesirably reduce the lubricant pressure P1, advantageously again minimized and at the same time the efficiency of the second pump 6 , or the suction stage can be improved. On the opposite side in the pressure room 14 becomes a control valve, the closure element 13 , which activates the drainage channel 15 without lubricant suction closes and the suction channel 9 to the lubricant suction stage, the second suction side 8th , opens.
  • If there is no need for the extraction of lubricant, the pressurization is interrupted with the lubricant pressure P1, pressure reduction valve via a Druckab reduced the pressure range of the suction and the frictional engagement is interrupted. On the opposite side is in the pressure room 14 by the spring force of the spring element 12 the pressure-free drainage channel opened again and the suction channel 9 locked.
  • An advantage of positioning the frictional or positive locking in the pressure chamber 14 There is the possibility of dissipating the heat generated by a plurality of switching operations by lubricants or to cool the components by lubricant.
  • Through the use of the switching element 11 , as shown in the first embodiment, the effects of wear in the torque transmitting friction point is counteracted in an advantageous manner, the switching unit "turns itself after". By the example, conical design of the switching element 11 Advantageously, the frictional force is increased in the form of an increase in the surface normal force. This may possibly be dispensed with Reibwerterhöhende measures.
  • By the simple design and use of a "simple" hydraulic valve arises over the use of an electric suction pump a significant cost advantage and not one switchable Konstantabsaugpumpe a significant consumption advantage.
  • In summary, the following advantages result in a nutshell:
    • - Fuel economy reduction
    • - Cost advantages
  • 1
    lubricant pump
    2
    first machine housing
    2 '
    second machine housing
    3
    first pump
    4
    first pressure side
    5
    first suction
    6
    second pump
    7
    second pressure side
    8th
    second suction
    9
    suction
    10
    drive shaft
    11
    switching element
    12
    spring element
    13
    closure element
    14
    pressure chamber
    15
    drain channel
    16
    hydraulic valve
    17
    axis
    18
    pressure line
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
  • Cited patent literature
    • - DE 102005029086 A1 [0004, 0004]

Claims (6)

  1. Lubricant pump ( 1 ) in a first machine housing ( 2 ) for an internal combustion engine, with a first pump ( 3 ) with a first printed side ( 4 ) for supplying the internal combustion engine with lubricant with a lubricant pressure (p1) and with a first suction side ( 5 ), as well as with a second pump ( 6 ) in a second machine housing ( 2 ' ) with a second pressure side ( 7 ) and a second suction side ( 8th ), to which a suction channel ( 9 ) is arranged, for sucking lubricant from the internal combustion engine, characterized in that the second pump ( 6 ) from the first pump ( 3 ) via a switching element ( 11 ) is switchable and the suction channel ( 9 ) of a one-sided with a spring force of a spring element ( 12 ) acted upon closure element ( 13 ) is closed, wherein on the spring element ( 12 ) facing away from a pressure chamber ( 14 ) is provided, which is acted upon by the lubricant pressure (p1) and wherein the pressure chamber ( 14 ) Lubricant carrying with the switching element ( 11 ) is in operative connection and wherein upon application of the pressure chamber ( 14 ) with lubricant pressure of the suction channel ( 9 ) is openable against the spring force and at the same time the switching element ( 11 ) with frictional or positive locking against a drive shaft ( 10 ) is printable.
  2. Lubricant pump according to claim 1, characterized in that in the machine housing adjacent to the suction channel ( 9 ) a drainage channel ( 15 ) is provided, wherein the suction channel ( 9 ) and the drainage channel ( 15 ) alternately with the closure element ( 13 ) are closable.
  3. Lubricant pump according to claim 1 or 2, characterized in that the pressure chamber ( 14 ) via a hydraulic or pneumatic or electric valve ( 16 ) With the lubricant pressure (p1) can be acted upon.
  4. Lubricant pump according to one of the claims 1 to 3, characterized in that the first and / or the second pump ( 3 . 6 ) are a vane pump or a gear pump.
  5. Lubricant pump according to one of the claims 1 to 4, characterized in that the drive shaft ( 10 ) a drive shaft of the first pump ( 3 ) or a camshaft or crankshaft of the internal combustion engine.
  6. Lubricant pump according to one of the claims 1 to 5, characterized in that the first machine housing ( 2 ) and the second machine housing ( 2 ' ) are constructed as a single machine housing.
DE102009025535A 2009-06-19 2009-06-19 Lubricant pump e.g. interior or external gear pumps for use in internal-combustion engine, has switch element pressed against drive shaft in friction fit and form fit manner during subjecting pressure chamber with lubricant pressure Pending DE102009025535A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102009025535A DE102009025535A1 (en) 2009-06-19 2009-06-19 Lubricant pump e.g. interior or external gear pumps for use in internal-combustion engine, has switch element pressed against drive shaft in friction fit and form fit manner during subjecting pressure chamber with lubricant pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009025535A DE102009025535A1 (en) 2009-06-19 2009-06-19 Lubricant pump e.g. interior or external gear pumps for use in internal-combustion engine, has switch element pressed against drive shaft in friction fit and form fit manner during subjecting pressure chamber with lubricant pressure

Publications (1)

Publication Number Publication Date
DE102009025535A1 true DE102009025535A1 (en) 2010-12-23

Family

ID=43122977

Family Applications (1)

Application Number Title Priority Date Filing Date
DE102009025535A Pending DE102009025535A1 (en) 2009-06-19 2009-06-19 Lubricant pump e.g. interior or external gear pumps for use in internal-combustion engine, has switch element pressed against drive shaft in friction fit and form fit manner during subjecting pressure chamber with lubricant pressure

Country Status (1)

Country Link
DE (1) DE102009025535A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011077507A1 (en) 2011-06-14 2012-12-20 Bayerische Motoren Werke Aktiengesellschaft Lubricant system for porsche cylinder head double-piston engine of e.g. sports car, has lubricant collection container arranged such that geodetic return of collected lubricant into lubricant tub via lubricant return-flow pipe is enabled
DE102011085355A1 (en) 2011-10-28 2013-05-02 Bayerische Motoren Werke Aktiengesellschaft Lubricant tank for internal combustion engine, has lubricant pump with electrically operable element, where electrical connection of element is guided outwards through opening in lubricant tank

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19502235A1 (en) * 1995-01-25 1996-08-08 Daimler Benz Ag Oil Supply System
DE10144693A1 (en) * 2001-09-11 2003-03-27 Volkswagen Ag Gear pump for supplying oil to vehicle IC engine incorporates dry sump pump with gearwheel driven by same shaft which drives main pump
DE10159104A1 (en) * 2001-12-01 2003-06-12 Porsche Ag Internal combustion engine
DE10305781A1 (en) * 2003-02-12 2005-05-25 Voigt, Dieter, Dipl.-Ing. Multistage oil pump for IC engines comprises outer gear-type control pump which produces compression stage and inner gear-type pump which produces feed stages
DE102005029086A1 (en) 2005-06-23 2007-01-04 Dr.Ing.H.C. F. Porsche Ag Oil pump for an internal combustion engine
DE102007039589A1 (en) * 2007-08-22 2009-02-26 Voigt, Dieter, Dipl.-Ing. Regular oil pump with adjustment-dependent oil pressure control

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19502235A1 (en) * 1995-01-25 1996-08-08 Daimler Benz Ag Oil Supply System
DE10144693A1 (en) * 2001-09-11 2003-03-27 Volkswagen Ag Gear pump for supplying oil to vehicle IC engine incorporates dry sump pump with gearwheel driven by same shaft which drives main pump
DE10159104A1 (en) * 2001-12-01 2003-06-12 Porsche Ag Internal combustion engine
DE10305781A1 (en) * 2003-02-12 2005-05-25 Voigt, Dieter, Dipl.-Ing. Multistage oil pump for IC engines comprises outer gear-type control pump which produces compression stage and inner gear-type pump which produces feed stages
DE102005029086A1 (en) 2005-06-23 2007-01-04 Dr.Ing.H.C. F. Porsche Ag Oil pump for an internal combustion engine
DE102007039589A1 (en) * 2007-08-22 2009-02-26 Voigt, Dieter, Dipl.-Ing. Regular oil pump with adjustment-dependent oil pressure control

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011077507A1 (en) 2011-06-14 2012-12-20 Bayerische Motoren Werke Aktiengesellschaft Lubricant system for porsche cylinder head double-piston engine of e.g. sports car, has lubricant collection container arranged such that geodetic return of collected lubricant into lubricant tub via lubricant return-flow pipe is enabled
DE102011085355A1 (en) 2011-10-28 2013-05-02 Bayerische Motoren Werke Aktiengesellschaft Lubricant tank for internal combustion engine, has lubricant pump with electrically operable element, where electrical connection of element is guided outwards through opening in lubricant tank

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