Classifications

• • 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
• • 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
• • 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
  • F16C37/00—Cooling of bearings

Definitions

• the invention relates to a crankshaft bearing of a crankshaft of an internal combustion engine according to the preamble of claim 1.
• a crankshaft bearing of a crankshaft is often referred to as a main bearing and serves to support and support the crankshaft in the cylinder crankcase of the internal combustion engine.
• a crankshaft bearing usually comprises a plain bearing of several bearing shells, which are accommodated in a blind bore of the cylinder crankcase.
• the base bore of the cylinder crankcase, in which the bearing shells of the plain bearing are inserted, is typically formed by a so-called bearing block, which is part of the cylinder crankcase, and a so-called bearing cap, which is also part of the cylinder crankcase.
• the sliding bearing of such a crankshaft bearing is oil lubricated to ensure the lowest possible wear of the crankshaft bearing.
• crankshaft bearing of a crankshaft of an internal combustion engine according to claim 1.
• either the bearing shell running surface or the bearing shell back or a surface of the cylinder crankcase adjoining the bearing shell back has a concave profiling.
• a bearing shell running surface or a bearing shell back of a bearing shell of a plain bearing of a crankshaft bearing or a surface of the cylinder crankcase bordering the bearing shell back with a concave profiling.
• a bearing load namely a pressure load and a temperature load, can be made uniform over the axial bearing width.
• FIG. 2 shows a schematic cross section through a crankshaft bearing of a crankshaft of an internal combustion engine according to a second exemplary embodiment of the invention.
• FIG 3 shows a schematic cross section through a crankshaft bearing of a crankshaft of an internal combustion engine according to a third exemplary embodiment of the invention.
• the present invention relates to a crankshaft bearing a crankshaft of an internal combustion engine.
• a crankshaft bearing serves to support and support the crankshaft in a cylinder crankcase of the internal combustion engine, wherein the crankshaft bearing comprises a plain bearing, which is typically composed of a plurality of bearing shells, namely an upper bearing shell and a lower bearing shell. These bearings are inserted into a bore in the cylinder crankcase.
• Fig. 1 shows a highly schematic, fragmentary cross section through a crankshaft bearing of a crankshaft, not shown, with a cutting direction in the axial direction of the crankshaft bearing, wherein in Fig. 1 is a cross section through a bearing shell 10, namely by a lower bearing shell 10, the crankshaft bearing and a cross section through a section of a cylinder crankcase 1 1 of the internal combustion engine adjoining the lower bearing shell 10 is shown.
• the lower bearing shell 10 shown in axial cross-section in FIG. 1 has a bearing shell running surface 12 which adjoins the crankshaft to be supported, forming a gap.
• FIG. 1 shows a cross section through the lower bearing shell 10 of the plain bearing of the crankshaft bearing and through the section of the cylinder crankcase 1 1 adjoining the lower bearing shell 10 in the axial direction, the axial direction A being shown in FIG. Furthermore, FIG. 1 shows a radial direction R and a circumferential direction U, wherein the circumferential direction U extends into the plane of the drawing or extends out of the plane of the drawing.
• the bearing shell running surface 12 of the bearing shell 10 is provided with a concave profiling, wherein the concave profiling of the bearing shell running surface 12 in the circumferential direction of the bearing shell 10 is circumferential and extends both in the radial direction and in the axial direction.
• Fig. 1 it can be seen that the concave curvature profile of the bearing shell running surface 12 is formed in the radial direction such that the radial bulge depth of the concave profiling in the axial center of the bearing shell 10 is lowest, said radial bulge depth in the direction of the axial edges of the Bearing shell 10 continuously reduced.
• FIG. 2 shows, to adjoin the bearing shell back 13 surface 14 of the cylinder crankcase 1 1 to be provided with the concave profiling.
• the bearing shell back 13 may be profiled concave.
• the bearing shell shown in FIGS. 2 and 3 (without profiling) then assumes a concave bearing surface, ie the state shown in FIG. 1, only in the installed or braced state.
• Figs. 2 and 3 can be made equalization of the compressive stress and temperature stress on the axial bearing width, and an increase in the oil flow in the tangential circumferential direction in the case of Figs. 2 and 3 can be achieved.
• crankshaft bearings can be increased. With constant dimensioning of a crankshaft bearing whose life can be extended.
• the invention can also be used to dimension the same with a constant service life of a crankshaft bearing smaller and thus to provide a more compact engine architecture by a shorter engine length and narrower storage. Furthermore, this can be realized an increase in performance of an internal combustion engine.
• the concave profiling changes as seen in the circumferential direction. So it is z. B. after this advantageous development possible that seen in the circumferential direction, the radial bulge depth of the concave curvature profile changed. As a result, the properties of the crankshaft bearing can be further improved.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
• Sliding-Contact Bearings (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=44653286

Family Applications (1)

Country Status (7)

Families Citing this family (4)

Family Cites Families (21)

• 2010
  • 2010-09-03 DE DE102010040244A patent/DE102010040244A1/de not_active Ceased
• 2011
  • 2011-09-02 US US13/820,535 patent/US20130287325A1/en not_active Abandoned
  • 2011-09-02 EP EP11757809.6A patent/EP2612045A1/de not_active Withdrawn
  • 2011-09-02 KR KR1020137007309A patent/KR101491580B1/ko active IP Right Grant
  • 2011-09-02 JP JP2013526492A patent/JP5707496B2/ja active Active
  • 2011-09-02 WO PCT/EP2011/065207 patent/WO2012028720A1/de active Application Filing
  • 2011-09-02 CN CN201180042425.3A patent/CN103119311B/zh active Active

Non-Patent Citations (1)

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