EP1761687B1 - Moteur a combustion interne a lubrification par circulation forcee selon le principe de la lubrification a carter sec - Google Patents

Moteur a combustion interne a lubrification par circulation forcee selon le principe de la lubrification a carter sec Download PDF

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Publication number
EP1761687B1
EP1761687B1 EP05733654A EP05733654A EP1761687B1 EP 1761687 B1 EP1761687 B1 EP 1761687B1 EP 05733654 A EP05733654 A EP 05733654A EP 05733654 A EP05733654 A EP 05733654A EP 1761687 B1 EP1761687 B1 EP 1761687B1
Authority
EP
European Patent Office
Prior art keywords
oil
internal combustion
combustion engine
sump
oil reservoir
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.)
Ceased
Application number
EP05733654A
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German (de)
English (en)
Other versions
EP1761687A1 (fr
Inventor
Erwin Rutschmann
Thorsten Wieg
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche 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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP1761687A1 publication Critical patent/EP1761687A1/fr
Application granted granted Critical
Publication of EP1761687B1 publication Critical patent/EP1761687B1/fr
Ceased 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
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M13/022—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction
    • 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
    • F01M1/12—Closed-circuit lubricating systems not provided for in groups F01M1/02 - F01M1/10
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/24—Multi-cylinder engines with cylinders arranged oppositely relative to main shaft and of "flat" type
    • F02B75/243—Multi-cylinder engines with cylinders arranged oppositely relative to main shaft and of "flat" type with only one crankshaft of the "boxer" type, e.g. all connecting rods attached to separate crankshaft bearings
    • 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
    • F01M1/12—Closed-circuit lubricating systems not provided for in groups F01M1/02 - F01M1/10
    • F01M2001/126—Dry-sumps

Definitions

  • the invention relates to an internal combustion engine with pressure circulation lubrication on the dry sump principle, in particular for a boxer engine according to the preamble of patent claim 1.
  • an oil sump box attached to the sump cover is provided in the oil guide housing or in the oil sump, in which the oil sump is designed to supply the engine with lubricating oil is.
  • the returned by the consumers in the oil pan lubricating oil is first returned outside of the ⁇ labsaugraum forming oil pan box before it passes through the monitored in ⁇ lschottkasten by flaps openings in the actual ⁇ labsaugraum.
  • the oil flowing back into the sump is conveyed by a suction pump into a separate oil tank or reservoir. From there, the pressure oil feed pump sucks off the lubricant and pushes it over the filter and gff. Oil cooler to the lubrication points.
  • the oil tank is in most cases attached to the outside of the engine housing and has appropriate connections for the externally installed oil pressure lines.
  • the invention has for its object to increase the specific power of an internal combustion engine to develop a low-friction engine with a dry sump - pressure circulation lubrication, especially for high-speed operation, in which the return or circulation times for lubricating oil are shortened.
  • the required for the pressure circulation lubrication of the engine components are to be integrated in a space-saving manner largely in the engine.
  • the required for the dry sump lubrication oil tank or oil reservoir can be integrated in a space-saving manner directly in the engine, so that the otherwise usually necessary externally laid oil lines accounted for as far as possible.
  • the oil sump forming the wet sump is arranged directly below the dry sump space.
  • the oil sump closing down the dry sump space can be double-walled, with an oil suction snorkel leading to the engine main oil pump being placed at the bottom of the forming cavity.
  • the lube oil receiving cavity is further provided with a port which is connected to the pressure side of the dry sump oil return pump.
  • the oil sump forming the wet sump is integrated directly in the crankcase and separated from the dry sump space by one or more bulkheads.
  • This offers for example for a boxer engine due to the horizontally arranged cylinder for the oil return in the wet sump a solution in which a dry room forming oil bulkhead in the crankcase is arranged so that left and right of the oil pan (wet sump) collecting spaces for the from the Oil bulkhead box extracted lubricating oil remain.
  • the two plenums communicate with each other through a gap formed between the oil sump cover and the bottom of the oil sump box.
  • Another aspect of the invention is that are used for oil return in the wet sump collecting chambers around the cylinder forming annular spaces.
  • the wet sump collecting chambers are arranged underneath the annular spaces used for the oil return, the lubricating oil can pass from the annular spaces directly into the collecting space (s) via corresponding openings. This can largely be dispensed with external oil lines, so that this measure contributes to a compact and inexpensive implementation of an internal combustion engine with dry sump lubrication.
  • FIG. 1 shows the not limited to this embodiment principle of a dry sump oil circuit diagram for a 6-cylinder boxer engine whose only necessary for the description of the oil circuit components are described below with reference to the drawings.
  • the engine has two crankcase halves 2 and 4, in each of which a row of cylinder banks 1 to 3 and 4 to 6 is arranged. To the two rows of cylinder banks is followed in each case by a cylinder head 6 and 8, in which the valve gear required for actuating the inlet and outlet valves is arranged.
  • the crankcase 2, 4 has below the bearing for the crankshaft 10 to a (dry sump) ⁇ labsaugraum 12, in which the intended for lubrication of the main bearing lubricating oil is collected.
  • An oil cap 14 closing off the oil suction chamber 12 at the bottom has a double-walled construction, the cavity 16 forming in the oil cap 14 being provided as a (wet sump) oil reservoir.
  • an oil return pump 18 is provided, on whose suction side an oil suction line 20 is connected, which leads to the oil suction chamber 12.
  • an oil suction snorkel 22 is fixed, which comes to rest on the upper oil cover wall 14a.
  • a line 24 is connected, which leads to the oil reservoir 16 via an oil / air separator 26, which is designed, for example.
  • an oil / air separator 26 which is designed, for example.
  • a main pump 28 is driven, on whose suction side an oil suction line 30 is connected, which leads via an opening in the upper oil cover wall 14 a in the oil reservoir 16.
  • an oil suction snorkel 32 placed near the lower oil cover wall 14b.
  • the pressure side 34 of the main feed pump 28 lead in the crankcase 2, 4 integrated oil supply lines (not shown in detail) to the consumers, such. the main bearing points of the crankshaft and the camshaft.
  • suction pumps 36, 38 are provided which suck the pumped from the main pump 28 in the cylinder heads 6, 8 lubricating oil and it via lines 40, 42 and the oil / air separator 26 also in return the oil reservoir 16.
  • suction pumps 36, 38 are provided which suck the pumped from the main pump 28 in the cylinder heads 6, 8 lubricating oil and it via lines 40, 42 and the oil / air separator 26 also in return the oil reservoir 16.
  • 4 vent lines 44, 46 are provided, which are also connected to the oil / air separator 26.
  • the oil / air separator 26 is connected via a line 48 to the intake system of the internal combustion engine.
  • the dry sump pressure circulation lubrication takes place in the following manner:
  • the lubricating oil located in the oil suction chamber 12 is sucked off via the oil return pump 18 and conveyed into the oil reservoir 16. From there, the lubricating oil is supplied via the main pump 28 to the consumers.
  • thensumpf- ⁇ labsaugraum 12 is limited by an oil bulkhead 50, on the two side walls 50a and 50b (wet sump) collecting spaces 52 and 54 adjacent. Both collecting chambers 52, 54 are connected to one another via a between the lower wall of the oil pan 50c and a sump cover 14 'forming gap 56 with each other.
  • the lubricating oil conveyed from the oil suction chamber 12 'into the (wet sump) collecting chambers 52, 54 is guided via an annular space 58, 60 surrounding the cylinders 1 to 3 and 4 to 6, respectively, on their front side facing the crank chamber by a seal 62 (shown only in the left crankcase half 2), eg in the form of plastic glasses, are sealed.
  • a seal 62 shown only in the left crankcase half 2
  • the annular spaces 58, 60 at their lower lateral surfaces openings or openings 64 which are in each case in communication with the (wet sump) collecting chambers 52, 54.
  • the middle cylinder of the two rows of cylinder banks 1 to 3 and 4 to 6 respectively has a vent pipe 66, 68, which is connected to the - related to the installation position of the cylinder upper side of the annular spaces 58 and 60 respectively.
  • the lubricating oil extracted from the cylinder heads 6, 8 with the aid of the suction pumps 36, 38 is also conveyed via the annular spaces 58, 60 into the collecting chambers 52, 54. Due to this form of oil return can largely be dispensed with externally routed oil lines; The lubricating oil can be defoamed via the annular spaces 58, 60 and air or gas fractions can be discharged to the outside via the venting connecting pieces 66, 68, so that separate oil / air separators can be dispensed with. As in Fig. 2 illustrated, the wet sump plenums 52, 54 and the Trocksumpf- ⁇ labsaugraum 12 'are vented via corresponding lines 70 and 72.
  • Fig. 4 illustrated third embodiment differs from the second embodiment (see Fig. 2 ) in that the oil bulkhead 50 'is arranged substantially centrally in the (wet sump) oil reservoir.
  • the oil bulkhead 50 ' is arranged substantially centrally in the (wet sump) oil reservoir.
  • connection between (wet sump) oil reservoir and dry sump oil suction space 12 ', e.g. in the form of holes, pipes or the like, so that even in the (wet sump) oil reservoir for venting the blowby gases, a negative pressure can occur.
  • a pressure limiting valve can be arranged in the connection.

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  • 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)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un moteur à combustion interne à lubrification par circulation forcée selon le principe de la lubrification à carter sec, notamment un moteur à cylindres opposés. Ce moteur comprend un carter, dans la partie inférieure duquel est formé un espace d'aspiration d'huile (12, 12′), à partir duquel l'huile de lubrification est transportée jusqu'au réservoir d'huile (16, 52, 54, 56) par une pompe de retour d'huile (18) dotée d'un conduit d'aspiration d'huile (20), alors que l'huile de lubrification qui se trouve dans le réservoir d'huile est amenée aux consommateurs par une pompe d'alimentation principale (28). Selon l'invention, l'espace de réserve d'huile (16, 52, 54,56) formant le carter humide est également intégré dans le carter du moteur.

Claims (7)

  1. Moteur à combustion interne à lubrification par circulation forcée selon le principe de la lubrification à carter sec, en particulier pour un moteur à cylindres opposés, comprenant un boîtier de moteur dans lequel est réalisé, dans la partie inférieure, un espace d'aspiration d'huile (carter sec) (12), duquel l'huile de lubrification est refoulée par le biais d'une pompe de refoulement de retour d'huile (18) pourvue d'une conduite d'aspiration d'huile jusqu'à un réservoir d'huile (16) (carter humide), tandis que l'huile de lubrification se trouvant dans le réservoir d'huile (16) est guidée par le biais d'une pompe de refoulement principale (28) jusqu'aux consommateurs, l'espace de réserve d'huile (16, 52, 54, 56) formant le carter humide étant également intégré dans le boîtier de moteur du moteur à combustion interne, caractérisé en ce que l'huile de lubrification aspirée hors d'un espace de carter sec (12) et hors des culasses (6, 8) est guidée sur un séparateur huile/air (26) avant de parvenir dans l'espace de réserve d'huile (16).
  2. Moteur à combustion interne selon la revendication 1, caractérisé en ce que l'espace de réserve d'huile (16) est disposé sous l'espace de carter sec (12).
  3. Moteur à combustion interne selon la revendication 2, caractérisé en ce que le couvercle d'huile (14) fermant l'espace de carter sec (12) par le bas est réalisé avec deux parois et la cavité forme l'espace de réserve d'huile (du carter humide) (16).
  4. Moteur à combustion interne selon la revendication 1, caractérisé en ce que l'espace de réserve d'huile (du carter humide) (52, 54, 56) est intégré dans le boîtier de vilebrequin (2, 4), de telle sorte que cet espace soit séparé de l'espace de carter sec (12') par une ou plusieurs cloisons (50a, 50b, 50c).
  5. Moteur à combustion interne selon la revendication 4, caractérisé en ce que la caisse de cloisonnement d'huile (50') est disposée essentiellement centralement dans l'espace de réserve d'huile (du carter humide) (52, 54, 56).
  6. Moteur à combustion interne selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un espace annulaire (58, 60) réalisé autour des cylindres est réalisé sous forme d'une partie de la recirculation d'huile.
  7. Moteur à combustion interne selon la revendication 6, caractérisé en ce que les espaces annulaires (58, 60) sont désaérés vers le haut.
EP05733654A 2004-06-23 2005-04-15 Moteur a combustion interne a lubrification par circulation forcee selon le principe de la lubrification a carter sec Ceased EP1761687B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004030352A DE102004030352A1 (de) 2004-06-23 2004-06-23 Brennkraftmaschine mit Druckumlaufschmierung nach dem Trockensumpfprinzip
PCT/EP2005/003986 WO2006000268A1 (fr) 2004-06-23 2005-04-15 Moteur a combustion interne a lubrification par circulation forcee selon le principe de la lubrification a carter sec

Publications (2)

Publication Number Publication Date
EP1761687A1 EP1761687A1 (fr) 2007-03-14
EP1761687B1 true EP1761687B1 (fr) 2012-08-22

Family

ID=34965082

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05733654A Ceased EP1761687B1 (fr) 2004-06-23 2005-04-15 Moteur a combustion interne a lubrification par circulation forcee selon le principe de la lubrification a carter sec

Country Status (5)

Country Link
US (1) US7798289B2 (fr)
EP (1) EP1761687B1 (fr)
JP (1) JP2008503682A (fr)
DE (1) DE102004030352A1 (fr)
WO (1) WO2006000268A1 (fr)

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DE102017002222A1 (de) 2017-03-08 2018-09-13 Audi Ag Kraftfahrzeug mit einer Brennkraftmaschine und zugeordnetem Schmiermittelkreislauf mit Trockensumpftank

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Publication number Priority date Publication date Assignee Title
DE102017002222A1 (de) 2017-03-08 2018-09-13 Audi Ag Kraftfahrzeug mit einer Brennkraftmaschine und zugeordnetem Schmiermittelkreislauf mit Trockensumpftank

Also Published As

Publication number Publication date
DE102004030352A1 (de) 2006-01-19
US7798289B2 (en) 2010-09-21
JP2008503682A (ja) 2008-02-07
WO2006000268A1 (fr) 2006-01-05
EP1761687A1 (fr) 2007-03-14
US20080236950A1 (en) 2008-10-02
WO2006000268A8 (fr) 2006-06-29

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