EP3439826A1 - Verfahren zur herstellung eines motorblocks eines verbrennungsmotors - Google Patents
Verfahren zur herstellung eines motorblocks eines verbrennungsmotorsInfo
- Publication number
- EP3439826A1 EP3439826A1 EP17706234.6A EP17706234A EP3439826A1 EP 3439826 A1 EP3439826 A1 EP 3439826A1 EP 17706234 A EP17706234 A EP 17706234A EP 3439826 A1 EP3439826 A1 EP 3439826A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder bore
- frusto
- diameter
- region
- head
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B33/00—Honing machines or devices; Accessories therefor
- B24B33/02—Honing machines or devices; Accessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
-
- 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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/18—Other cylinders
Definitions
- the present invention relates to a method for producing an engine block of an internal combustion engine.
- the invention relates to a shaping of a cylinder bore of a cylinder of the engine block.
- Cylinder bore usually when a cylinder head is attached and / or the engine block is heated by the operation of the engine.
- different extents of the engine block may also result from water cooling cooling only a portion of the engine block.
- the originally cylindrical bore deforms, resulting in increased friction of the piston.
- Cylinder bore having two different diameters.
- the regions of different diameters are connected by a variable diameter transition region.
- Cylinder bore to be adapted to a potential different heating of the engine block.
- the molding of the lower cylindrical portion in particular is very difficult. It is therefore an object of the invention to provide a method for producing an engine block for an internal combustion engine, which allows a simple and cost-effective application of an engine block, wherein a friction of a feasible in the engine block piston is reduced.
- the object is achieved by a method for producing an engine block of an internal combustion engine.
- the method comprises the following steps
- a motor block main body is preferably manufactured by a metal casting process.
- the engine block main body on head attachment means for fixing a cylinder head and with at least one cylinder bore for a piston of the internal combustion engine. It is provided that the cylinder bore extends between an upper end and a lower end.
- the upper end and the lower end is an end formed by an outer surface of the engine block main body. The upper end is closest to a piston at a top dead center while the piston is closest to the bottom at a bottom dead center.
- the engine block main body is preferably manufactured by a metal casting process.
- the engine block main body on head attachment means for fixing a cylinder head and with at least one cylinder bore for a piston of the internal combustion engine. It is provided that the cylinder bore extends between an upper end and a lower end.
- the upper end and the lower end is an end formed by an outer surface of the engine block main body. The upper end is closest to a piston at a top dead center while the piston is closest to the bottom at a bottom dead center
- Cylinder bore an upper expansion area connect so that between an outer surface of the engine block main body on which a cylinder head is mounted, and the cylinder bore is the upper expansion area.
- the upper end of the cylinder bore corresponds to the point at which the cylinder bore merges into the upper expansion region.
- the head attachment means are preferably threaded holes, into which mounting screws for fastening the cylinder head are screwed.
- an auxiliary structure is applied to the engine block main body and attaching the auxiliary structure to the head attachment means.
- Head attachment means are preferably threaded holes attached to the engine block body. Thus, fastening preferably takes place by means of
- the auxiliary structure is preferably a honing glasses.
- a cylinder head is preferably simulated, so that a delay of the cylinder bore can be produced by the application of the cylinder head.
- the auxiliary structure has a through hole, which releases the upper end of the cylinder bore. This makes it possible to reach the cylinder bore through the passage opening with a machining tool and to machine the cylinder bore.
- the machining is in particular honing the
- Magnification area introduced into the volume enclosed by the cylinder bore compensates for distortion caused by thermal heating of the engine block during operation of an engine equipped with the engine block.
- the enlargement region is designed such that a diameter of the cylinder bore is smaller at the upper end than at the lower end due to the enlargement region. In this way, a piston clearance between the piston and the cylinder bore in the lower region of the cylinder bore is increased. At the same time is the
- the engine block can be manufactured in particular by the machining of the cylinder bore from the engine block main body.
- the auxiliary structure is preferably removed after completion of the machining and / or the introduction of the enlargement range and can in particular for a machining of another
- Engine block body can be used.
- the inventive method allows to produce engine blocks that are operable with low friction losses.
- magnification range is a lower
- Expansion area is advantageously rotationally symmetric. Besides that is provided that the lower bell-shaped expansion region rests against the lower end of the cylinder bore. Furthermore, it is provided that a diameter of the cylinder bore increases continuously non-linearly over the lower bell-shaped expansion area in the direction of the lower end. In this way, a piston clearance between the piston and the cylinder bore, in particular in the lower region of
- Cylinder bore preferably in the area of the lower bell-shaped
- a piston clearance can be changed greatly over a short travel of the piston. This allows a long travel of the piston with guidance by a low piston clearance and a short transition area to reach a high piston clearance area.
- a smaller diameter can thus be realized at the lower end in order to manufacture the same piston play. This results in a low cutting work.
- the enlargement region preferably comprises at least a first frusto-conical portion and a second frusto-conical portion.
- the first truncated cone-shaped portion and the second truncated cone-shaped portion preferably directly adjoin one another.
- Truncated cone-shaped section compared to a cylindrical shape, very easily manufacturable.
- the first frustoconical portion has a greater wall pitch than the second frustoconical portion.
- the second frusto-conical portion bears against the lower end.
- both the first frusto-conical portion and the second frusto-conical portion are very easily manufacturable.
- the first truncated cone-shaped portion and the second truncated cone-shaped portion advantageously abut against each other at a boundary portion. It is intended that the first frustoconical portion and the second frustoconical portion
- Section at the boundary region have the same diameter. Thus, there are no jumps in diameter within the cylinder bore. Rather, there is a continuous transition of a course of the diameter between the upper end and lower end. Thus, in turn friction losses of a feasible within the cylinder bore piston can be reduced.
- the upper end of the cylinder bore has a smallest diameter of the cylinder bore.
- the upper end determines the minimum piston clearance.
- the lower end has a largest diameter of the cylinder bore.
- the lower end determines the maximum
- Cylinder bore are present.
- a piston in the cylinder bore is always adequately guided and only has to perform low friction work.
- the manufacture of, in particular, the enlargement region, particularly preferably the lower bell-shaped expansion region as well as the first frusto-conical region and the second frusto-conical region is simplified.
- Magnification range is ensured in this way that at each point as a nominal size prevails a diameter that is larger than any other diameter, which is closer to the upper end. Production-related tolerance deviations from the nominal size have no effect on this.
- the cylinder bore advantageously has a diameter larger than the smallest diameter in a region between the lower end and a boundary.
- the diameter of the cylinder bore steadily increases at least in sections in the direction of the lower end. At the same time it is preferably provided that the diameter does not decrease in this area in the direction of the lower end. It is provided that the limit of at most 70%, in particular at most 60%, particularly advantageously at most 50%, of the distance between the upper end and lower end of the cylinder bore from the upper end away. In this way, in particular friction losses within the cylinder bore are minimized when a piston moves in the cylinder bore.
- the cylinder bore encloses a volume into which, preferably by machining the cylinder bore, in particular a different head region from the remaining volume is introduced.
- the head area is adjacent
- the head region is in particular an area in which there is a minimal piston play.
- the head area is also particularly advantageous at the magnification area.
- the cylinder bore has only two areas, the head area and the enlargement area. In this way, the production of the engine block, in particular the cylinder bore, is simplified.
- the head region is advantageously the first frusto-conical section.
- the head area is frusto-conical or cylindrical.
- the diameter of the cylinder bore does not decrease seen in the direction of the lower end. In this way, on the one hand, a frictional loss of the piston is reduced within the cylinder bore, on the other hand, the engine block, in particular the
- the head area and the enlargement area advantageously abut one another at a border area. It is envisaged that the head area and the
- Magnification range at the boundary region have the same diameter. Thus, there are no jumps in diameter within the cylinder bore.
- the largest diameter of the cylinder bore is advantageously at most 0.5% larger than the smallest diameter of the cylinder bore.
- the largest diameter is at most 0.4%, particularly advantageously at most 0.3% larger than the smallest diameter of the cylinder bore. This ensures that a maximum
- the lower bell-shaped expansion region may preferably take various forms as long as the lower bell-shaped expansion region is rotationally symmetrical and a diameter of the cylinder bore steadily increases in the direction of the lower end.
- the lower bell-shaped expansion region has no point at which the diameter of the cylinder bore is identical to another point of the lower bell-shaped expansion region. In this way, on the one hand a friction loss performance of the piston can be minimized, at the same time a production of the engine block, in particular the cylinder bore is very simplified.
- an auxiliary auxiliary structure in addition to the auxiliary structure, which in particular simulates a cylinder head, an auxiliary auxiliary structure can be applied.
- Auxiliary auxiliary structure is preferred between the auxiliary structure and the
- the auxiliary auxiliary structure may particularly preferably be a cylinder head gasket.
- FIG. 1 shows a schematic illustration of an engine block during production by means of a method according to a first exemplary embodiment of the invention
- Figure 2 is a schematic illustration of an engine block, according to a
- Figure 3 is a schematic illustration of an engine block, according to a
- Figure 4 is a schematic illustration of an engine block, according to a
- Figure 5 is a schematic illustration of an engine block, which was prepared according to a method according to a fourth embodiment of the invention.
- Figure 6 is a schematic illustration of an engine block, which according to a
- Figure 1 shows schematically an engine block 1 which is manufactured according to a method according to a first embodiment of the invention. This is one
- Engine block main body 8 is provided, the head attachment means 17 in the form of threaded holes. Mounting screws 12 can be screwed into these threaded holes in order to be able to fasten a cylinder head (not shown) to the engine block main body 8.
- the engine block main body 8 has a cylinder bore 4.
- the cylinder bore 4 extends between an upper end 2 and a lower end 3. In this case, the upper end 2 corresponds to that end to which the cylinder head can be placed.
- the lower end 3 corresponds to the end to which a
- Such an engine block main body 8 can be provided in particular by a casting method, in particular a metal casting method.
- auxiliary structure 15 is applied on the engine block main body 1.
- the auxiliary structure 15 is preferably a honing glasses.
- the auxiliary structure 15 is applied by means of an attachment of the auxiliary structure 15 to the head attachment means 17.
- the auxiliary structure 15 is fastened to the engine block main body 8 by means of mounting screws 12.
- the auxiliary structure 15 has a
- a diameter of the passage opening 16 is greater than that
- the cylinder bore 4 is preferably machined.
- the machining process particularly preferably comprises honing the cylinder bore 4
- the auxiliary structure 15 is removed.
- an engine block 1 is made from the engine block main body 8.
- the auxiliary structure 15 is preferably reusable and can honing another
- Engine block body can be used.
- FIG. 2 shows the engine block 1, which was manufactured with the described method according to the first embodiment.
- the production took place in particular with the aid of the above-described auxiliary structure 15 with the mentioned advantages for the compensation of fourth-order warping.
- the cylinder bore 4 has in a region between the lower end 3 and a limit which is at most 70%, preferably at most 60%, particularly preferably at most 50%, of the distance between the upper end 2 and lower end 3 of the upper end 2 away Diameter larger than the smallest diameter.
- a limit which is at most 70%, preferably at most 60%, particularly preferably at most 50%, of the distance between the upper end 2 and lower end 3 of the upper end 2 away Diameter larger than the smallest diameter.
- the diameter in the direction of the lower end 3 increases at least in sections.
- the diameter does not decrease in this area.
- the expansion is present to affect the piston clearance, but not to influence the volume of the combustion chamber. It is envisaged that the diameter of the cylinder bore 4 at the lower end 3 is a maximum diameter of the cylinder bore 4.
- the diameter of the cylinder bore 4 at the lower end 3 is at most 0.5%, preferably at most 0.4%, particularly preferably at most 0.3%, larger than a smallest diameter of the cylinder bore 4. In this way is achieved in that the frictional power which a piston performs during a movement within the cylinder bore 4 is minimized. At the same time, the cylinder bore 4 is very easy and inexpensive to manufacture.
- the cylindrical head portion 5 abuts in a boundary region of the lower bell-shaped expansion region 1 first At this boundary region, the lower bell-shaped expansion region 11 and the cylindrical head region 5 have the same diameter, so that there are no cracks in the wall of the cylinder bore 4.
- the bell shape of the lower bell-shaped expansion region 1 1 can be adapted to different needs of the engine design. It is only intended that the lower bell-shaped expansion region 1 1
- the lower bell-shaped expansion region 1 1 is formed such that the diameter of the cylinder bore 4 in the direction of the lower end 3 increases steadily. Thus, no location can be found within the lower bell-shaped expansion portion 1 1, the same
- Expansion region 1 1 has.
- Widening range 1 1 is again achieved that losses due to friction of a piston are minimized within the cylinder bore 4, at the same time the production of the cylinder bore 4 is made possible very easily and inexpensively.
- Embodiments are shaped differently. This is achieved in particular by a corresponding control of the honing tool.
- the honing of the Magnification area 7 and the head area 5, 6 is in all
- Figure 3 shows schematically an engine block 1 which has been produced according to a method according to a second embodiment of the invention.
- engine block main body 8 which has head means fasteners 17 in the form of threaded holes. In these threaded holes mounting screws 12 are screwed to attach a cylinder head (not shown) to the engine block main body 1 can.
- the engine block main body 8 has a cylinder bore 4.
- the cylinder bore 4 extends between an upper end 2 and a lower end 3. In this case, the upper end 2 corresponds to that end to which the cylinder head can be placed.
- the lower end 3 corresponds to the end to which a
- crankcase is placed. Within the cylinder bore 4 is a piston
- the cylinder bore 4 has in a region between the lower end 3 and a limit which is at most 70%, preferably at most 60%, particularly preferably at most 50%, of the distance between the upper end 2 and lower end 3 of the upper end 2 away Diameter larger than the smallest diameter.
- a limit which is at most 70%, preferably at most 60%, particularly preferably at most 50%, of the distance between the upper end 2 and lower end 3 of the upper end 2 away Diameter larger than the smallest diameter.
- the diameter in the direction of the lower end 3 increases at least in sections. At the same time it is provided that the diameter does not decrease in this area.
- the expansion is present to affect the piston clearance, but not to influence the volume of the combustion chamber.
- the diameter of the cylinder bore 4 at the lower end 3 is a maximum diameter of the cylinder bore 4.
- the diameter of the cylinder bore 4 at the lower end 3 is at most 0.5%, preferably at most 0.4%, particularly preferably at most 0.3%, larger than a smallest diameter of the cylinder bore 4.
- the cylinder bore 4 is very easy and inexpensive to manufacture.
- a frusto-conical head portion 6 and a magnification range 7 is introduced. This is done in particular by machining the cylinder bore, preferably by honing.
- the frusto-conical head portion 6 abuts against the upper end 2. Adjoining the cylindrical head region 6 is the enlargement region 7, which in the exemplary embodiment shown is formed by a lower bell-shaped expansion region 11. The lower bell-shaped expansion region 1 1 is in turn at the lower end 3 at.
- the frustoconical head portion 6 abuts in a boundary region of the lower bell-shaped expansion region 1 1. At this boundary region, the lower bell-shaped expansion region 11 and the frustoconical head region 6 have the same diameter, so that there are no cracks in the wall of the cylinder bore 4. Due to the conical shape of the frustoconical head portion 6, a widening of the cylinder bore 4 is already made possible very close to the upper end 2, whereby the expansion with a small pitch is present.
- the bell shape of the lower bell-shaped expansion region 1 1 can be adapted to different needs of the engine design. It is only intended that the lower bell-shaped expansion region 1 1
- the lower bell-shaped expansion region 1 1 is formed such that the diameter of the cylinder bore 4 in the direction of the lower end 3 increases steadily. Thus, no location can be found within the lower bell-shaped expansion portion 1 1, the same
- Expansion region 1 1 has.
- Widening range 1 1 is again achieved that losses due to friction of a piston are minimized within the cylinder bore 4, at the same time the production of the cylinder bore 4 is made possible very easily and inexpensively.
- the lower bell-shaped expansion portion 11 in the first embodiment and in the second embodiment is alternatively a lower frusto-conical expansion area.
- the lower frusto-conical widening portion and the frusto-conical head portion the same diameter, so that no cracks in the wall of the cylinder bore 4 are present.
- the conical shape of the lower frusto-conical expansion region 12 can be adapted to different needs of the engine design.
- Cone shape does not allow any location within the lower frusto-conical shape
- Expansion area 12 find, which has the same diameter as at another point of the lower frusto-conical expansion area 12. Thus, it is achieved by the lower frusto-conical widening portion 12 that losses due to friction of a piston within the cylinder bore 4 are minimized, at the same time the production of the cylinder bore 4 is made possible very easily and inexpensively.
- FIG. 4 shows schematically an engine block 1 which has been produced according to a method according to a third embodiment of the invention.
- the production took place in particular with the aid of the above-described auxiliary structure 15 with the mentioned advantages for the compensation of fourth-order warping.
- Engine block main body 8 is provided, the Kopfffenbefest Trent 17 has in the form of threaded holes.
- mounting screws 12 are screwed to attach a cylinder head (not shown) to the engine block main body 1 can.
- the engine block main body 8 has a cylinder bore 4.
- the cylinder bore 4 extends between an upper end 2 and a lower end 3.
- the upper end 2 corresponds to that end to which the cylinder head can be placed.
- the lower end 3 corresponds to the end to which a
- crankcase is placed.
- a piston can be arranged, which is movable for operating the internal combustion engine within the cylinder bore 4 up and down.
- the cylinder bore 4 has in a region between the lower end 3 and a limit which is at most 70%, preferably at most 60%, particularly preferably at most 50%, of the distance between the upper end 2 and lower end 3 of the upper end 2 away Diameter larger than the smallest diameter.
- a limit which is at most 70%, preferably at most 60%, particularly preferably at most 50%, of the distance between the upper end 2 and lower end 3 of the upper end 2 away Diameter larger than the smallest diameter.
- the diameter in the direction of the lower end 3 increases at least in sections. At the same time it is provided that the diameter does not decrease in this area.
- the Expansion exists to affect the piston clearance, but not to affect the volume of the combustion chamber.
- the diameter of the cylinder bore 4 at the lower end 3 is a maximum diameter of the cylinder bore 4.
- the diameter of the cylinder bore 4 at the lower end 3 is at most 0.5%, preferably at most 0.4%, particularly preferably at most 0.3%, larger than a smallest diameter of the cylinder bore 4. In this way is achieved in that the frictional power which a piston performs during a movement within the cylinder bore 4 is minimized.
- the cylinder bore 4 is very easy and inexpensive to manufacture.
- a cylindrical head region 5 and an enlargement region 7 are introduced. This is done in particular by machining the cylinder bore 4, preferably by honing.
- the cylindrical head region 5 abuts against the upper end 2.
- a first frusto-conical section 9 bears against the cylindrical head region 5.
- At the first frusto-conical portion 9 is located on a second frusto-conical portion 10, wherein the second truncated conical portion 10 abuts the lower end 3 of the cylinder bore 4.
- the cylindrical head region 5 abuts the first frusto-conical region 9 in a boundary region. At this boundary region, the first one faces
- truncated cone-shaped portion 9 and the cylindrical head portion 5 have the same diameter, so that no cracks in the wall of the cylinder bore 4 are present.
- the first frustoconical portion 9 is immediately adjacent to the second frusto-conical portion 10. It is contemplated that at a boundary region where the first truncated conical portion 9 meets the second frusto-conical portion 10, the first truncated conical portion 9 and the second
- first frusto-conical portion 9 and the second frusto-conical portion 10 have the same diameter.
- a continuous wall of the cylinder bore 4 is given without cracks or steps are present.
- the combination of the first frusto-conical portion 9 and the second frusto-conical portion 10 allows on the one hand an increase of the piston clearance by increasing the diameter of the cylinder bore 4, at the same time the immediately adjacent arrangement of the first frusto-conical Area 9 and the second frusto-conical portion 10 is very easy to manufacture.
- the combination of the first frusto-conical portion 9 and the second frusto-conical portion 10 allows a low power loss of a piston due to friction within the cylinder bore 4 while minimizing the manufacturing cost of the engine block 1.
- FIG. 5 shows schematically an engine block 1 which has been produced according to a method according to a fourth embodiment of the invention.
- the production took place in particular with the aid of the above-described auxiliary structure 15 with the mentioned advantages for the compensation of fourth-order warping.
- Engine block main body 8 is provided, the Kopfffenbefest Trent 17 has in the form of threaded holes.
- mounting screws 12 are screwed to attach a cylinder head (not shown) to the engine block main body 1 can.
- the engine block main body 8 has a cylinder bore 4.
- the cylinder bore 4 extends between an upper end 2 and a lower end 3.
- the upper end 2 corresponds to that end to which the cylinder head can be placed.
- the lower end 3 corresponds to the end to which a
- crankcase is placed. Within the cylinder bore 4 is a piston
- the cylinder bore 4 has in a region between the lower end 3 and a limit which is at most 70%, preferably at most 60%, particularly preferably at most 50%, of the distance between the upper end 2 and lower end 3 of the upper end 2 away Diameter larger than the smallest diameter.
- a limit which is at most 70%, preferably at most 60%, particularly preferably at most 50%, of the distance between the upper end 2 and lower end 3 of the upper end 2 away Diameter larger than the smallest diameter.
- the diameter in the direction of the lower end 3 increases at least in sections. At the same time it is provided that the diameter does not decrease in this area.
- the expansion is present to affect the piston clearance, but not to influence the volume of the combustion chamber.
- the diameter of the cylinder bore 4 at the lower end 3 is a maximum diameter of the cylinder bore 4.
- the diameter of the cylinder bore 4 at the lower end 3 is at most 0.5%, preferably at most 0.4%, particularly preferably at most 0.3%, larger than a smallest diameter of the cylinder bore 4. In this way is achieved that the frictional power that a Performs piston during a movement within the cylinder bore 4, is minimized.
- the cylinder bore 4 is very easy and inexpensive to manufacture.
- a frusto-conical head region 6 and in the enlargement region 7 are introduced. This is done in particular by machining the cylinder bore 4, preferably by honing.
- the frustoconical head portion 6 abuts against the upper end 2.
- the frustoconical head portion 6 is at the same time a first frusto-conical portion 9.
- At the first frusto-conical portion 9 is a second
- the enlargement area 7 is formed by the first frusto-conical area 9 and the second frusto-conical area 10.
- the truncated cone-shaped head region 6 abuts the lower bell-shaped expansion region 11 in a boundary region.
- the lower bell-shaped expansion region 11 and the truncated cone-shaped head region 6 have the same diameter, so that there are no cracks in the wall of the cylinder bore 4. Due to the conical shape of the frustoconical head portion 6, a widening of the cylinder bore 4 is already made possible very close to the upper end 2, whereby the expansion with a small pitch is present.
- the first frustoconical portion 9 is immediately adjacent to the second frusto-conical portion 10. It is contemplated that at a boundary region where the first truncated conical portion 9 meets the second frusto-conical portion 10, the first truncated conical portion 9 and the second
- first frusto-conical portion 9 and the second frusto-conical portion 10 have the same diameter.
- a continuous wall of the cylinder bore 4 is given without cracks or steps are present.
- the combination of the first frusto-conical portion 9 and the second frusto-conical portion 10 allows, on the one hand, enlargement of the piston clearance by increasing the diameter of the cylinder bore 4, at the same time making the immediately adjacent arrangement of the first frusto-conical portion 9 and the second frusto-conical portion 10 very easy.
- the combination of the first frusto-conical portion 9 and the second frusto-conical portion 10 allows a low power loss of a piston due to friction within the cylinder bore 4 while minimizing the manufacturing cost of the engine block 1.
- FIG. 6 schematically shows an engine block 1 which has been produced according to a method according to a fifth exemplary embodiment of the invention.
- the production took place in particular with the aid of the above-described auxiliary structure 15 with the mentioned advantages for the compensation of fourth-order warping.
- Engine block main body 8 is provided, the Kopfffenbefest Trent 17 has in the form of threaded holes.
- mounting screws 12 are screwed to attach a cylinder head (not shown) to the engine block main body 1 can.
- the engine block main body 8 has a cylinder bore 4.
- the cylinder bore 4 extends between an upper end 2 and a lower end 3.
- the upper end 2 corresponds to that end to which the cylinder head can be placed.
- the lower end 3 corresponds to the end to which a
- crankcase is placed. Within the cylinder bore 4 is a piston
- the cylinder bore 4 has in a region between the lower end 3 and a limit which is at most 70%, preferably at most 60%, particularly preferably at most 50%, of the distance between the upper end 2 and lower end 3 of the upper end 2 away Diameter larger than the smallest diameter.
- a limit which is at most 70%, preferably at most 60%, particularly preferably at most 50%, of the distance between the upper end 2 and lower end 3 of the upper end 2 away Diameter larger than the smallest diameter.
- the diameter in the direction of the lower end 3 increases at least in sections. At the same time it is provided that the diameter does not decrease in this area.
- the expansion is present to affect the piston clearance, but not to influence the volume of the combustion chamber.
- the diameter of the cylinder bore 4 at the lower end 3 is a maximum diameter of the cylinder bore 4.
- the diameter of the cylinder bore 4 at the lower end 3 is at most 0.5%, preferably at most 0.4%, particularly preferably at most 0.3%, larger than a smallest diameter of the cylinder bore 4. In this way is achieved in that the frictional power which a piston performs during a movement within the cylinder bore 4 is minimized.
- the cylinder bore 4 is very easy and inexpensive to manufacture.
- a frusto-conical head region 6 and an enlargement region 7 are introduced. This is done in particular by a machining of the cylinder bore 4, preferably by honing.
- the frusto-conical head portion 6 abuts against the upper end 2.
- At the frusto-conical head region 6 in turn abuts a first frusto-conical section 9.
- At the first frusto-conical portion 9 is located on a second frusto-conical portion 10, wherein the second frusto-conical portion 10 rests against the lower end 3 of the cylinder bore 4.
- the enlargement area 7 is formed by the first frusto-conical area 9 and the second frusto-conical area 10.
- the frustoconical head portion 6 abuts in a boundary region of the lower bell-shaped expansion region 1 1. At this boundary region, the lower bell-shaped expansion region 11 and the frustoconical head region 6 have the same diameter, so that there are no cracks in the wall of the cylinder bore 4. Due to the conical shape of the frustoconical head portion 6, a widening of the cylinder bore 4 is already made possible very close to the upper end 2, whereby the expansion with a small pitch is present.
- the first frusto-conical portion 9 is immediately adjacent to the second frusto-conical portion 10. It is provided that at a boundary region, where the first frusto-conical portion 9 meets the second frusto-conical portion 10, the first frusto-conical portion 9 and the second
- first frusto-conical portion 9 and the second frusto-conical portion 10 have the same diameter. Thus, a continuous wall of the cylinder bore 4 is given without cracks or steps are present.
- the combination of the first frusto-conical portion 9 and the second frusto-conical portion 10 allows, on the one hand, enlargement of the piston clearance by increasing the diameter of the cylinder bore 4, at the same time making the immediately adjacent arrangement of the first frusto-conical portion 9 and the second frusto-conical portion 10 very easy.
- the combination of the first frusto-conical portion 9 and the second frusto-conical portion 10 allows a low power loss of a piston due to friction within the cylinder bore 4 while minimizing the manufacturing cost of the engine block 1. LIST OF REFERENCE NUMBERS
Landscapes
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016205754.5A DE102016205754A1 (de) | 2016-04-07 | 2016-04-07 | Verfahren zur Herstellung eines Motorblocks eines Verbrennungsmotors |
| PCT/EP2017/053758 WO2017174249A1 (de) | 2016-04-07 | 2017-02-20 | Verfahren zur herstellung eines motorblocks eines verbrennungsmotors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3439826A1 true EP3439826A1 (de) | 2019-02-13 |
| EP3439826B1 EP3439826B1 (de) | 2023-07-05 |
Family
ID=58094437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17706234.6A Active EP3439826B1 (de) | 2016-04-07 | 2017-02-20 | Verfahren zur herstellung eines motorblocks eines verbrennungsmotors |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3439826B1 (de) |
| CN (1) | CN108472785A (de) |
| DE (1) | DE102016205754A1 (de) |
| WO (1) | WO2017174249A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018202540B4 (de) * | 2018-02-20 | 2022-01-27 | Ford Global Technologies, Llc | Motorblock eines Verbrennungsmotors mit optimierten Wärmeleiteigenschaften |
| DE102019219378A1 (de) | 2019-12-11 | 2021-06-17 | Mahle International Gmbh | Zylinderlaufbuchse für eine Brennkraftmaschine |
| DE102021205978A1 (de) * | 2021-06-11 | 2022-12-15 | Mahle International Gmbh | Zylinderlaufbuchse für eine Brennkraftmaschine |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1576404A1 (de) * | 1967-04-19 | 1970-03-05 | Rheinstahl Hanomag Ag | Zylinder von Verbrennungskraftmaschinen |
| DE2810322C2 (de) * | 1978-03-10 | 1982-11-25 | Peter 7442 Neuffen Nagel | Honmaschine |
| JPS62287965A (ja) * | 1986-06-02 | 1987-12-14 | Mazda Motor Corp | エンジン用シリンダの加工方法 |
| DE50114827C5 (de) * | 2001-12-20 | 2017-05-24 | Gehring Technologies Gmbh | Verfahren zur Herstellung einer Bohrung |
| BRPI0503019B1 (pt) * | 2005-07-22 | 2018-02-06 | Whirlpool S.A. | Conjunto de pistão e cilindro com folga diametral variável e cilindro para uso em conjuntos de pistão e cilindro com folga diametral variável |
| JP4518059B2 (ja) * | 2006-10-06 | 2010-08-04 | トヨタ自動車株式会社 | シリンダブロックの加工用治具及び加工方法 |
| DE102006062665A1 (de) * | 2006-12-29 | 2008-07-03 | Gehring Gmbh & Co. Kg | Verfahren zur formändernden Bearbeitung einer Bohrung |
| JP2009078320A (ja) * | 2007-09-26 | 2009-04-16 | Isuzu Motors Ltd | シリンダボアのホーニング加工装置 |
| DE102008026146B4 (de) * | 2008-05-30 | 2014-05-28 | Audi Ag | Kolbenreibungsreduktion in einem Zylinder |
| CN102918247A (zh) * | 2010-06-01 | 2013-02-06 | 本田技研工业株式会社 | 气缸体及其加工方法 |
| DE102011117660B4 (de) | 2011-11-04 | 2014-08-21 | Audi Ag | Brennkraftmaschine |
| JP5866264B2 (ja) * | 2012-08-02 | 2016-02-17 | 本田技研工業株式会社 | シリンダブロックの加工用冶具及びシリンダブロックの製造方法 |
| DE102013204714B4 (de) * | 2013-03-18 | 2024-06-06 | Elgan-Diamantwerkzeuge Gmbh & Co. Kg | Honverfahren und Honwerkzeug |
| DE102013013943B3 (de) * | 2013-08-21 | 2015-01-15 | Audi Ag | Brennkraftmaschine |
| DE102013020717A1 (de) * | 2013-12-07 | 2015-06-11 | Daimler Ag | Hubkolben-Verbrennungskraftmaschine, insbesondere für einen Kraftwagen |
| CN103953453A (zh) * | 2014-03-17 | 2014-07-30 | 东风朝阳朝柴动力有限公司 | 变气缸孔截面的发动机机体 |
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2016
- 2016-04-07 DE DE102016205754.5A patent/DE102016205754A1/de active Pending
-
2017
- 2017-02-20 WO PCT/EP2017/053758 patent/WO2017174249A1/de not_active Ceased
- 2017-02-20 EP EP17706234.6A patent/EP3439826B1/de active Active
- 2017-02-20 CN CN201780007240.6A patent/CN108472785A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102016205754A1 (de) | 2017-10-12 |
| WO2017174249A1 (de) | 2017-10-12 |
| CN108472785A (zh) | 2018-08-31 |
| EP3439826B1 (de) | 2023-07-05 |
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