WO2011069569A1 - Machine à combustion interne et procédé d'exploitation d'une telle machine à combustion interne - Google Patents

Machine à combustion interne et procédé d'exploitation d'une telle machine à combustion interne Download PDF

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Publication number
WO2011069569A1
WO2011069569A1 PCT/EP2010/005638 EP2010005638W WO2011069569A1 WO 2011069569 A1 WO2011069569 A1 WO 2011069569A1 EP 2010005638 W EP2010005638 W EP 2010005638W WO 2011069569 A1 WO2011069569 A1 WO 2011069569A1
Authority
WO
WIPO (PCT)
Prior art keywords
internal combustion
combustion engine
crankcase
working space
cylinder
Prior art date
Application number
PCT/EP2010/005638
Other languages
German (de)
English (en)
Inventor
Alexander Von Gaisberg-Helfenberg
Thomas Stolk
Original Assignee
Daimler 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 Daimler Ag filed Critical Daimler Ag
Publication of WO2011069569A1 publication Critical patent/WO2011069569A1/fr

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Classifications

    • 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
    • F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
    • F02B75/221—Multi-cylinder engines with cylinders in V, fan, or star arrangement with cylinder banks in narrow V-arrangement, having a single cylinder head
    • 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
    • F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
    • F02B75/041—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of cylinder or cylinderhead positioning

Definitions

  • the invention relates to an internal combustion engine in the preamble of
  • Patent claim 1 specified type and a method for operating such an internal combustion engine specified in the preamble of claim 9 Art.
  • EP 1 245 803 A1 discloses an internal combustion engine having an engine block with at least one cylinder and with a crankshaft which has at least one crank and is rotatably mounted in the engine block.
  • the crankshaft is supported by bearings, which are arranged in adjustable eccentrics. Rotation of the eccentric causes relative adjustment of the center axis of the crankshaft relative to the engine block so as to adjust the compression ratio of a piston in the cylinder.
  • Compression ratio operated as cylinders of the other cylinder bank.
  • crankcase and with two, an angle enclosing and in each case at least one working space, in particular a cylinder, the internal combustion engine having working space housings, in particular cylinder housings, is provided by the fact that the respective working space housing is movable relative to the crankcase.
  • Internal combustion engine allows without changing moving parts in their position, or intervene in their bearings.
  • the axis of rotation of the crankshaft remains unchanged in position and thus, for example, always coaxial with the axis of rotation of the transmission input shaft of a conventionally fixed in the vehicle built-in transmission.
  • crankshaft of the internal combustion engine in the crankcase derselbigen storable or stored, with their relative position to the crankcase and thus the position of their corresponding bearing to represent the adjustable
  • the respective working space housing can be moved, for example, by means of at least one eccentric device assigned to the respective working space housing, wherein the eccentric devices correspond to the space provided by the working space housing enclosed angle to each other are limited.
  • the working space housing at an adjustment of the eccentric to the im
  • Working space housings is thus set the same compression ratio.
  • the eccentric devices are advantageously arranged coaxially to the crankshaft, which keeps the space requirement of the internal combustion engine according to the invention low. This avoids package problems, especially in a space-critical area such as an engine compartment of a motor vehicle.
  • the eccentric devices are supported on the crankshaft received at least in regions by the crankcase, in particular on corresponding bearing journals of the crankshaft, for example the respective one
  • Workspace housing is assigned to a respective journal of the crankshaft. This means that the eccentric between the crankshaft and the
  • the mentioned eccentric devices can be actuated by means of a corresponding actuator, that is rotatable, to represent the different compression ratios.
  • the eccentric devices are mounted on the crankshaft, in particular on a respective journal, in order to design a defined and fixed support and to realize a small space requirement of the internal combustion engine according to the invention.
  • At least one torque support device is provided between the working space housings and the crankcase.
  • the internal combustion engine has at least one working chamber housing head element, in particular a cylinder head, by means of which the working space housing is covered and connected, for example screwed, to each working space housing, a respective working chamber housing head element can be assigned, then the crankcase of the internal combustion engine is advantageously connected to the at least one a work space housing head element mediating at least a sealing element, in particular a bellows, connected, wherein the
  • Sealing element is designed so flexible that it is also in the relative movement of the working space housing and thus the at least one
  • the invention also relates to a method for operating a
  • Internal combustion engine in V-construction with a crankcase with two, an angle enclosing and at least one working space, in particular a cylinder, the internal combustion engine having working space housings, in particular cylinder housings, wherein the respective working space housing for setting variable compression ratios is moved relative to the crankcase.
  • the inventive method thus makes it possible to adjust the compression ratio of the internal combustion engine as needed to a corresponding operating condition of the internal combustion engine, for example, an operation of the internal combustion engine at part load requires a different compression ratio than operation of the internal combustion engine at full load to represent a
  • Verdichtungsils in a simple and thus cost-effective manner, without affecting moving parts and thus their bearings, which the Expenditure and thus drive the cost of the internal combustion engine or the process in undesirable heights.
  • Working space housing or the at least one working space head element is low, which also keeps the effort to seal the described composite of working space housing and crankcase in a small frame.
  • the respective working space housing with the same compression ratio can be operated, which thus allows the same combustion conditions in the corresponding work spaces. This also allows a consumption and low-emission operation of
  • Fig. 1 shows two cross-sectional views of an embodiment of the
  • variable compression ratio internal combustion engine wherein a high compression ratio is set
  • Fig. 2 shows two cross-sectional views of the internal combustion engine according to FIG. 1, wherein a low compression ratio is set.
  • 1 and 2 show an internal combustion engine 10 in V-construction with a crankcase 12, in which a crankshaft 14 is received and over
  • the internal combustion engine 10 has a plurality of cylinder housings 16 and 18, wherein in FIGS. 1 and 2, two cylinder housings 16 and 18 are shown.
  • the internal combustion engine 10 has a plurality of cylinder housings 16 and 18, wherein in FIGS. 1 and 2, two cylinder housings 16 and 18 are shown.
  • Cylinder housing 16 is associated with a first cylinder bank 20, and the cylinder housing 18 of a second cylinder bank 22, wherein the cylinder housing 16 and 18 each have a working space in the form of a cylinder 24, in which a piston 26 according to directional arrows 28 and 30 is held movable.
  • the direction arrows 28 and 30 correlate with the longitudinal extent of the cylinder 24 of the cylinder housing 16 and 18th
  • the cylinder housings 16 and 8 are each covered by a cylinder head 32 and 34 and screwed thereto, wherein in the cylinder heads 32 and 34
  • the cylinder housings 16 and 18 associated piston 26, wherein due to the choice of cross-sectional plane only the cylinder housing 16 associated piston 26 is shown in Figs. 1 and 2 are connected via connecting rod 36 to the crankshaft 14, wherein the connecting rod 36 via a small connecting rod eye and a corresponding piston pin 38 with the piston 26 and a large connecting rod with a
  • crank pin 40 of the crankshaft 14 are connected.
  • the crank pin 40 is arranged eccentrically to the axis of rotation of the crankshaft 14.
  • Fig. 1 is a high
  • Compression ratio set which means that a distance s between a respective, formed by the cylinder heads 32 and 34 combustion chamber roof of the cylinder 24 and a respective, the cylinder heads 32 and 34 facing the end face of the piston 26 is very low when the piston 26 in their respective top dead centers. This leads to a high compression of a provided in the respective cylinder 24 working gas.
  • crankcase 12 For sealing the composite of crankcase 12 and cylinder housing 16 and 18, the crankcase 12 is connected to the cylinder heads 32 and 34, respectively, by intermediary of a respective bellows 46 which seals the internal combustion engine 10 against leakage of lubricating oil and combustion gases escaped into the crankcase 12.
  • the bellows 46 are shown in FIG. 1 in a contracted position.
  • Directional arrow 48 is a lower compression ratio of
  • Internal combustion engine 10 realized, which is shown in FIG. 2.
  • the cylinder housings 16 and 18 are moved away from the crankcase 12 parallel to their longitudinal extent according to the directional arrows 28 and 30 relative to the crankcase 12. Since the relative position of the crankshaft 14 due to the fixed bearing of the crankshaft 14 in the crankcase 2 remains the same, there is an increase in the distance s between the described end face of the respective piston 26 and the respective combustion chamber roof, resulting in a low compression of the working gas and thus a low Compression ratio of
  • crankshaft 14 is arranged coaxially with an input shaft of a transmission associated with the internal combustion engine 10 and can also remain arranged, and that too different compression ratios of the internal combustion engine 10, since there is no change in the relative position of the crankshaft 14 to the crankcase 12.
  • the eccentric devices 44 are arranged coaxially with the crankshaft 14 and supported and supported on this, which allows a direct flow of force from the crankshaft to the cylinder housings 16 and 18 or vice versa and thus prevents a complicated flow of force. This is the reliability of the internal combustion engine 10 conducive, since moving parts and thus their bearings in the setting of the corresponding
  • the internal combustion engine 10 therefore has a high reliability and a low probability of failure with optimal and needs-based adjustability to respective operating conditions.
  • the operation of both cylinder banks 20 and 22 is ensured with the same compression ratios, which equal combustion conditions in the respective cylinder 24 allows to represent a fuel consumption and low-emission operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne une machine à combustion interne (10) à structure en V avec un carter d'embiellage (12) et avec deux carters d'espace de travail (16, 18), en particulier des carters de cylindre (16, 18), limitant un angle et présentant chacun au moins un espace de travail (24) de la machine à combustion interne (10), en particulier un cylindre (24), chaque carter d'espace de travail (16, 18) pouvant être déplacé par rapport au carter d'embiellage (12). L'invention concerne également un procédé d'exploitation d'une machine à combustion interne (10) à structure en V avec un carter d'embiellage (12) et avec deux carters d'espace de travail (16, 18), en particulier des carters de cylindre (16, 18), limitant un angle et présentant chacun au moins un espace de travail (24) de la machine à combustion interne (10), en particulier un cylindre (24), chaque carter d'espace de travail (16, 18) étant déplacé par rapport au carter d'embiellage (12) pour ajuster des rapports volumétriques variables.
PCT/EP2010/005638 2009-12-09 2010-09-14 Machine à combustion interne et procédé d'exploitation d'une telle machine à combustion interne WO2011069569A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009057665.7 2009-12-09
DE200910057665 DE102009057665A1 (de) 2009-12-09 2009-12-09 Verbrennungskraftmaschine sowie Verfahren zum Betreiben einer solchen Verbrennungskraftmaschine

Publications (1)

Publication Number Publication Date
WO2011069569A1 true WO2011069569A1 (fr) 2011-06-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/005638 WO2011069569A1 (fr) 2009-12-09 2010-09-14 Machine à combustion interne et procédé d'exploitation d'une telle machine à combustion interne

Country Status (2)

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DE (1) DE102009057665A1 (fr)
WO (1) WO2011069569A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994000681A1 (fr) * 1992-06-30 1994-01-06 Fanja Ltd. Procede et dispositif de modification du rapport volumetrique dans un moteur a explosion
US5443043A (en) * 1990-12-03 1995-08-22 Saab Automobile Aktiebolag Internal combustion engine with variable compression, provided with reinforcements of the crankcase section
FR2746848A1 (fr) * 1996-03-27 1997-10-03 Condamin Bernard Moteur a rapport volumetrique variable et son procede de montage
EP1245803A1 (fr) 2001-03-30 2002-10-02 Gomecsys B.V. Moteur à combustion interne à taux de compression variable
EP1471233A2 (fr) * 2003-04-22 2004-10-27 Toyota Jidosha Kabushiki Kaisha Dispositiv et procede pour la variation du rapport de compression dans un moteur à combustion interne

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5443043A (en) * 1990-12-03 1995-08-22 Saab Automobile Aktiebolag Internal combustion engine with variable compression, provided with reinforcements of the crankcase section
WO1994000681A1 (fr) * 1992-06-30 1994-01-06 Fanja Ltd. Procede et dispositif de modification du rapport volumetrique dans un moteur a explosion
FR2746848A1 (fr) * 1996-03-27 1997-10-03 Condamin Bernard Moteur a rapport volumetrique variable et son procede de montage
EP1245803A1 (fr) 2001-03-30 2002-10-02 Gomecsys B.V. Moteur à combustion interne à taux de compression variable
EP1471233A2 (fr) * 2003-04-22 2004-10-27 Toyota Jidosha Kabushiki Kaisha Dispositiv et procede pour la variation du rapport de compression dans un moteur à combustion interne

Also Published As

Publication number Publication date
DE102009057665A1 (de) 2011-06-16

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