WO2011137972A1 - Machine à pistons alternatifs - Google Patents

Machine à pistons alternatifs Download PDF

Info

Publication number
WO2011137972A1
WO2011137972A1 PCT/EP2011/001926 EP2011001926W WO2011137972A1 WO 2011137972 A1 WO2011137972 A1 WO 2011137972A1 EP 2011001926 W EP2011001926 W EP 2011001926W WO 2011137972 A1 WO2011137972 A1 WO 2011137972A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
reciprocating
housing part
reciprocating engine
bearing part
Prior art date
Application number
PCT/EP2011/001926
Other languages
German (de)
English (en)
Inventor
Dieter Nowak
Tilmann RÖMHELD
Michael Wagenplast
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 WO2011137972A1 publication Critical patent/WO2011137972A1/fr

Links

Classifications

    • 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
    • F02F7/0002—Cylinder arrangements
    • F02F7/0007—Crankcases of engines with cylinders in line
    • 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
    • F02B75/045—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of a variable connecting rod length
    • 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
    • F02B75/047—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of variable crankshaft position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D15/00—Varying compression ratio
    • F02D15/02—Varying compression ratio by alteration or displacement of piston stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
    • F16C9/02—Crankshaft bearings

Definitions

  • the invention relates to a reciprocating engine specified in the preamble of claim 1. Art.
  • Such reciprocating engines are known from the mass production of reciprocating engines. They have a plurality of bearings on which a crankshaft of the internal combustion engine is to be stored in a crankcase.
  • the crankcase must bear and support forces introduced by the crankshaft via the bearing point into the crankcase, which requires a stable design of the crankcase. If further components are to be supported on the crankcase, this requires a further stable and rigid design of the crankcase. This is conventionally associated with the disadvantage that the crankcase and thus the reciprocating engine has an undesirably high weight.
  • Patent claim 1 solved.
  • Advantageous embodiments with expedient and non-trivial developments of the invention are specified in the dependent claims.
  • An inventive reciprocating engine with a housing part, by which at least one cylinder of the reciprocating engine is formed, and with a
  • Bearing arrangement on which a crankshaft of the reciprocating engine is to be stored, is characterized in that the storage device is formed by at least one separately formed from the housing part bearing part, which is connected to the housing part.
  • the crankshaft, and optionally an entire crank mechanism of the reciprocating engine which, for example, the crankshaft, a the Cylinder associated connecting rod, a connected to the connecting rod piston and possibly further parts, is to be stored on the storage device completely, the at least one bearing part from an operation of the reciprocating engine resulting bearing and engine forces absorb and support.
  • housing part which, for example, as a cylinder crankcase of the
  • Reciprocating engine is formed of a particularly lightweight material
  • aluminum-based, magnesium-based, from an aluminum alloy, a magnesium alloy, plastic or the like form, whereby the housing part and thus the entire reciprocating engine have a particularly low weight. This keeps the energy demand for operating the reciprocating engine and for moving a motor vehicle with the reciprocating engine in a small frame, which is associated with low fuel consumption and low C0 2 emissions of the reciprocating engine.
  • the bearing part can accordingly be designed to accommodate the bearing and engine forces, in particular with regard to its material, in order to ensure a secure and stable support of the bearing and engine forces over a long service life
  • the housing part does not have to absorb these bearing and engine forces and can be configured particularly easily and efficiently both with regard to the material and with regard to a structural design with regard to wall thicknesses, cost of materials and / or the like.
  • the bearing part makes it possible to pre-assemble the crankshaft and, in particular, the complete crank drive for supporting the crankshaft or the crank drive on the bearing part, and in terms of time prior to a state of the bearing part connected to the housing part. So is the crankshaft or the entire cranking on the
  • the bearing part can be connected to the crankshaft or the crank mechanism completely mounted on the bearing device as a module with the housing part and, for example, in the as
  • Cylinder crankcase formed housing part are used at least partially. This allows a particularly simple and inexpensive assembly and parallelization of manufacturing steps for mounting the reciprocating engine, which keeps the production costs derselbigen low.
  • the storage device comprises, for example, a bearing cap, which constitutes a second bearing part formed separately from the housing part, and to be connected or connected to the first bearing part for the representation of the bearing device is.
  • a main bearing seat for supporting the crankshaft is formed, which directly serves a bearing surface for receiving a bearing, a rolling bearing, a bearing shell or the crankshaft.
  • Main bearing bracket corresponding bearing cap has such a bearing surface for receiving the bearing, the rolling bearing, the bearing shell or the crankshaft directly, whereby the crankshaft and the entire crank mechanism is to be stored on the first and the second bearing part completely. In this case, therefore, the crankshaft or the entire crank mechanism for storage on the first bearing part and the second bearing part
  • Housing part connects.
  • Storage device is at least partially formed on which a further shaft, in particular an adjusting shaft for adjusting a compression ratio of at least one cylinder of the reciprocating engine, to store.
  • the bearing part thus has a very high functional performance, since both the crankshaft or the entire crank mechanism and the other shaft to the respective
  • Storage facilities are to be stored.
  • an adjustment, a cross lever and / or other components are stored and pre-assembled on the bearing part, whereupon the bearing part with the crankshaft, the crank mechanism and the components of the adjusting device connected as a module with the housing part can be.
  • the bearing part is used at least partially with the pre-assembled and stored components in the designed as a cylinder crankcase housing part.
  • the further storage device also includes a bearing cap as the third bearing part, which is connected to the first bearing part to form the further storage device, in particular screwed.
  • the shaft is completely formed on the first and the third bearing part
  • the reciprocating engine comprises at least two cylinders formed by the housing part, wherein at least one
  • Adjustment device is provided, by means of which the respective
  • Compression ratios of the cylinders are independently adjustable variably. This makes it possible to optimally adapt the compression ratios of the cylinders to a plurality of different operating states of the reciprocating piston engine in order to realize low fuel consumption and low C0 2 emissions of the reciprocating engine.
  • the adjusting device comprises the at the other
  • Storage device to be supported shaft and, for example, a hydraulic cylinder in which a piston is slidably disposed.
  • Fig. 1 is a schematic perspective view of a bearing part for a
  • FIG. 2 shows a further schematic perspective view of the bearing part according to FIG. 1;
  • Fig. 3 is a further schematic perspective view of the bearing part according to the preceding figures. 1 to 3 show a bearing part 10 for a reciprocating engine, which is formed separately from a housing part of the reciprocating engine through which four cylinders of the reciprocating engine are formed. Are connected to the bearing part 10
  • Main bearing cap 2 which are each screwed by means of screws 14 to the bearing part 10.
  • a main bearing lane 16 is formed, to which a crankshaft of the reciprocating engine is to be stored completely.
  • the storage lane 16 has main bearings 18 for the crankshaft, which are received by the main bearings 18 bearings, bearings or the crankshaft directly to the storage of this.
  • the crankshaft and an entire crank mechanism comprising the crankshaft, connecting rods assigned to the respective cylinder, pistons connected to the respective connecting rods and / or further components are to be stored completely at the bearing channel 16, whereby the bearing part 10 and the main bearing caps 12 receive bearing and engine forces and can support.
  • the bearing part 10 is L-shaped, wherein the bearing lane 16 is formed on a leg 20 of the L-shape by the main bearing cap 2 and the bearing part 10.
  • a further leg 22 of the L-shape is formed by the bearing part 10 and further bearing cap 24, a further bearing lane 26 on which a pivot shaft of an adjusting device of the reciprocating engine is to be stored completely.
  • the bearing lane 26 formed by the bearing part 10 and the bearing cap 24 includes bearing points 32 to which the adjusting shaft is to be stored.
  • the storage lane 26 is arranged in the vertical direction of the reciprocating engine according to a direction arrow 17 above the main storage lane 16.
  • Cylinders independently adjustable variably whereby the reciprocating engine can be very well adapted to a variety of different operating points. Since the articulation shaft is to be stored on the storage lane 26 completely, the bearing member 10 and the bearing cap 24 can also be incorporated by the pivot shaft bearing forces. This means that the housing part does not have to absorb the bearing and engine forces. Thus, the housing part made of a particularly lightweight material, such as aluminum base, magnesium base, an aluminum alloy, a magnesium alloy, plastic or the like with very little
  • Wall thicknesses be formed, which is the weight of the housing part and thus the entire reciprocating engine keeps in a very small frame. It is possible to form the housing part as an aluminum die-cast part, whereby the
  • bearing cap 24 are screwed by means of screws 28 to the bearing part 10 to illustrate the bearing lane 26th
  • the bearing part 10 By the bearing part 10, the main bearing cap 12 and the bearing cap 24, it is possible to store the crankshaft, possibly the entire crank mechanism with the cranks, connecting rods, cross lever and / or the like and the articulation shaft and preassembled on the bearing part 10, whereupon the bearing part 10th ,
  • the main bearing cap 12 and the bearing cap 24, the crankshaft, the crank mechanism and the adjusting shaft can be connected as a module with the housing part.
  • the housing part is formed, for example, as a cylinder crankcase, wherein the bearing part 0 is at least partially inserted into the cylinder crankcase.
  • the connection of the bearing part 10 with the housing part takes place by screwing the bearing part 10 with the housing part via designated screw-on 34th
  • the particularly stable formed bearing member 10 further allows a carrier of the reciprocating engine, a gear flange and accessories to attach to the bearing part 10, since the bearing member 10 is stable enough to accommodate and support bearing forces can.
  • the housing part can be particularly easily formed and has the primary task of ensuring an oil seal to prevent leakage of oil.
  • the bearing member 10 allows the tolerances to be reduced by one more, which is conducive to the efficient operation of the reciprocating engine.
  • oil guide channels 30 are formed in the bearing part 10, which are fluidly connected to a main oil circuit of the reciprocating engine, and by means of which oil to the main bearings 18 and the bearings 32 feasible is.
  • Daimler AG For cooling and lubrication of the main bearing 18 of the storage lane 16 and the bearings 32 of the storage lane 26 oil guide channels 30 are formed in the bearing part 10, which are fluidly connected to a main oil circuit of the reciprocating engine, and by means of which oil to the main bearings 18 and the bearings 32 feasible is.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

La présente invention concerne une machine à pistons alternatifs avec une partie de boîtier par laquelle est formé au moins un cylindre de la machine à pistons alternatifs, et avec un dispositif de palier (16, 26) sur lequel peut être supporté un vilebrequin de la machine à pistons alternatifs. Le dispositif de palier (16, 26) est formé par au moins une partie de palier (10, 12, 24) réalisée séparément de la partie de boîtier, qui est connectée à la partie de boîtier.
PCT/EP2011/001926 2010-05-07 2011-04-15 Machine à pistons alternatifs WO2011137972A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010019759.9 2010-05-07
DE201010019759 DE102010019759A1 (de) 2010-05-07 2010-05-07 Hubkolbenmaschine

Publications (1)

Publication Number Publication Date
WO2011137972A1 true WO2011137972A1 (fr) 2011-11-10

Family

ID=44242605

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/001926 WO2011137972A1 (fr) 2010-05-07 2011-04-15 Machine à pistons alternatifs

Country Status (2)

Country Link
DE (1) DE102010019759A1 (fr)
WO (1) WO2011137972A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE575230C (de) * 1930-07-05 1933-04-26 Otto Severin Ruud Brennkraftmaschine mit durch Verlegung des Kolbenhubes sich selbsttaetig der Belastung anpassendem veraenderlichen Verdichtungsraum
DE2501605A1 (de) * 1974-01-16 1975-07-24 Peugeot Aufbau eines verbrennungsmotors
JPH09144555A (ja) * 1995-11-25 1997-06-03 Yamaha Motor Co Ltd 少数気筒の４サイクルエンジン
WO2007092168A2 (fr) * 2006-02-02 2007-08-16 Edward Charles Mendler Capteur de pression de combustion
JP2008045443A (ja) * 2006-08-11 2008-02-28 Toyota Motor Corp 可変圧縮比内燃機関
JP2008274962A (ja) * 2008-08-11 2008-11-13 Toyota Motor Corp 火花点火式内燃機関

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE575230C (de) * 1930-07-05 1933-04-26 Otto Severin Ruud Brennkraftmaschine mit durch Verlegung des Kolbenhubes sich selbsttaetig der Belastung anpassendem veraenderlichen Verdichtungsraum
DE2501605A1 (de) * 1974-01-16 1975-07-24 Peugeot Aufbau eines verbrennungsmotors
JPH09144555A (ja) * 1995-11-25 1997-06-03 Yamaha Motor Co Ltd 少数気筒の４サイクルエンジン
WO2007092168A2 (fr) * 2006-02-02 2007-08-16 Edward Charles Mendler Capteur de pression de combustion
JP2008045443A (ja) * 2006-08-11 2008-02-28 Toyota Motor Corp 可変圧縮比内燃機関
JP2008274962A (ja) * 2008-08-11 2008-11-13 Toyota Motor Corp 火花点火式内燃機関

Also Published As

Publication number Publication date
DE102010019759A1 (de) 2011-11-10

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