EP2771558A1 - Piston and connecting rod for an internal combustion engine - Google Patents
Piston and connecting rod for an internal combustion engineInfo
- Publication number
- EP2771558A1 EP2771558A1 EP12743171.6A EP12743171A EP2771558A1 EP 2771558 A1 EP2771558 A1 EP 2771558A1 EP 12743171 A EP12743171 A EP 12743171A EP 2771558 A1 EP2771558 A1 EP 2771558A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- course
- pressure side
- box
- connecting rod
- 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
-
- 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
- F02F3/00—Pistons
- F02F3/0015—Multi-part pistons
- F02F3/0069—Multi-part pistons the crown and skirt being interconnected by the gudgeon pin
-
- 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
- F02F3/00—Pistons
-
- 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
- F02F3/00—Pistons
- F02F3/0076—Pistons the inside of the pistons being provided with ribs or fins
-
- 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
- F02F3/00—Pistons
- F02F3/02—Pistons having means for accommodating or controlling heat expansion
Definitions
- the invention relates to a piston of an internal combustion engine, which has a piston crown with a ring field and arranged on the piston crown shaft part, wherein the shaft part has at least two supporting shaft wall sections and the supporting shaft wall sections are connected to each other via at least two opposite the piston outer diameter oblique box walls, wherein in each case a pin boss for receiving a piston pin is arranged in the box wall and forms a skirt wall portion of the pressure side and the other shaft wall portion of the counter-pressure side. Furthermore, the invention relates to a connecting rod of an internal combustion engine, comprising a connecting rod for receiving a piston pin, wherein the connecting rod cooperates with the piston.
- a piston which has a piston crown, a ring field and a piston shaft, consisting of supporting shaft wall sections and past connecting walls which connect the shaft wall sections together, and in the direction of a bolt axis to a piston axis recessed pin bosses, which Penetrate connecting walls.
- the connecting walls in the region of its peripheral lower edge are convex to an axis and formed in the region of its upper edge below the ring field concave to the axis, wherein the width of the skirt wall sections at the bottom corresponds approximately to the width of the shaft wall sections below the ring field ,
- Such known from the prior art pistons are subject to high mass load due to the high speeds during operation in an internal combustion engine.
- a reduction in the weight of the piston performed by design measures leads to a reduction of the oscillating mass during operation in an internal combustion engine, whereby the mass load on the component is also reduced. Due to this weight reduction performed on the piston, however, it is disadvantageous to a reduction in stiffness of the piston, which has a negative effect on the performance of the piston in an internal combustion engine as well as negative impact on the wear and strength behavior of the piston.
- the one object is achieved in that the inner surface of the pin boss relative to the center of the piston is flush with the surface of the associated box wall and the box wall has a concave course in the course transverse to the direction of the pin boss.
- a flush course it is meant that the bolt hub in the direction of the piston center is an integral part of the box wall and that the bolt hub is limited by the box wall, wherein the bolt hub does not protrude from the box wall in the direction of the piston center.
- the further object is achieved in that the connecting rod has a shape to which the concave profile of the respective box wall is adapted.
- An advantage of such a piston according to the invention is that the weight of the piston is reduced, wherein at the same time a sufficiently high rigidity of the piston is achieved by the course of the box wall and the arrangement of the pin boss in the piston. Further advantageously, the force gaps in the oscillating inertial forces and gas forces are reduced, resulting in Abstützungsabstandsverring réelle the bolt reaction forces. Next to it will be reduced by the piston according to the invention, the burden of inertial forces. Furthermore, the piston according to the invention has a high seizing resistance, optimum guidance and sufficient support during operation in an internal combustion engine. By adjusting the piston to the connecting rod design, these effects are further enhanced and improved.
- the two box walls have a concave, preferably a mirror-image corresponding concave, course such that by the two box walls approximately a uniform X-shape is formed, so that an approximately symmetrical piston is formed.
- the X-shape is formed by each forming a box wall one side of the approximately forming X, wherein the box walls do not touch each other at the point of contact of the two X-leg sides.
- the two box walls on a concave profile such that by the two box walls approximately a non-uniform X-shape is formed, so that an asymmetric piston is formed.
- the respective section angle formed between the pressure side and the counterpressure side of the shaft wall section is the same, thereby creating a uniform profile of the X-shape of the box walls and thus creating an approximately symmetrical piston.
- the piston according to the invention has two skirt wall sections, of which a skirt wall section forms the pressure side and a skirt wall section forms the counterpressure side.
- the section angle of the pressure side and the counter-pressure side is measured in each case between the two contact points of the associated shaft wall section and the two associated box walls with respect to the stroke axis of the piston.
- the stroke axis of the piston in the stroke direction in the internal combustion engine runs centrally through the piston.
- the section angle between the pressure side and counter-pressure side of the piston are different, so that an asymmetric piston is formed.
- an asymmetric piston is formed at unequal of formed in the skirt wall portion section angles between the pressure side and counter-pressure side creates a non-uniform profile of the X-shape of the box walls. At such unequal section angles, an asymmetric piston is created.
- the dimensions of the shaft wall sections are the same, so that an approximately symmetrical piston is formed. With identical dimensions of the skirt wall sections of the pressure side and counter-pressure side thus creates an approximately symmetrical piston.
- the dimensions of the shaft wall portions of the piston are different, so that an asymmetric piston is formed.
- the skirt wall section on the pressure side and the skirt wall section on the counterpressure side differ in an asymmetric piston in that the one skirt wall section seen from the piston crown in the direction of stroke axis and connecting rod, ie in the direction of the piston underside, in each case at least one different dimension relative to the other skirt wall portion.
- the one skirt wall section in the direction of the skirt wall section course has at least one different dimension with respect to the other skirt wall section.
- the thickness of the shaft wall sections between the pressure side and counter-pressure side is the same, so that an approximately symmetrical piston is formed.
- the thickness of the shaft wall sections refers to a plane that is perpendicular to the lifting axis.
- the thickness of the shaft wall sections of the piston between the pressure side and counter-pressure side is different, so that an asymmetric piston is formed.
- an asymmetric piston is formed.
- the width of the box walls between the pressure side and counter-pressure side is the same, so that an approximately symmetrical piston is formed.
- An approximately symmetrical piston arises from the fact that the mirror-image sides correspond with respect to a mirror plane.
- the mirror plane is thereby formed by a plane which is spanned by the lifting axis and the axis of the pin boss, and another plane, wherein the further plane is spanned by the lifting axis and a transverse axis, said transverse axis transverse to the lifting axis and runs transversely to the axis of the pin boss.
- the width of the box walls between the pressure side and counter-pressure side is different, so that an asymmetrical piston is formed.
- the width of one box wall can vary in each case in mirror image relative to the mirror plane between the pressure side and the counterpressure side in the direction of the stroke axis relative to the other box wall.
- it is possible with an asymmetrical piston that the width of the respective box wall with respect to the other box wall between the pressure side and counter-pressure side varies in the direction of the transverse axis.
- the pin boss protrudes from the associated box wall in the direction of the piston outside.
- a part of the pin boss is formed by the box wall itself.
- the pin boss is therefore an integral part of the box wall, wherein there is no protrusion of the pin boss in the direction of the piston inside, that is piston center, and the box wall with the pin boss forms a single continuous surface based on the piston inside.
- the box wall assumes the same shape as the pin boss surface in the area of the center of the piston. In the direction of the piston outer side, the main body of the respective pin boss extends from the respectively associated box wall itself.
- the pin boss protrudes on the opposite side of the piston head on the box wall from the box wall.
- a part of the pin boss extends out of the box wall in the area of the piston underside.
- the piston has on the opposite side of the piston head, the surface of the box wall in the direction of the piston outside on the box wall to a covenant, which amplifies the box wall for receiving side forces.
- a covenant may have as material accumulation both a round, oval, teardrop-shaped and / or any other shape.
- the collar has transversely to the direction of the course of the pin boss and parallel to the course of the box walls of the same dimensions, so that equal collar characteristics between pressure side and counter-pressure side result, creating an approximately symmetrical piston.
- a course transverse to the direction of the course of the pin boss and parallel to the course of the box walls, a course is defined by which the respective box wall from one side of the box wall, for example the side in the pressure side, to the opposite other side of the same box wall, for example the side in the area of the counter-pressure side, is passed through.
- a reverse course is also possible from the side in the region of the counter-pressure side in the direction of the side in the region of the pressure side.
- the dimensions of the collar are different transversely to the direction of the course of the pin boss and parallel to the course of the box walls, so that an asymmetric piston is formed.
- unequal dimensions of the Federal each box wall side transverse to the direction of the course of the pin boss and parallel to the course of the box walls creates an asymmetric piston by unequal collar expression of the respective box wall.
- the collar of a box wall to the collar of the other box wall in the corresponding area be different pronounced, so that thereby also forms an asymmetrical piston.
- the piston head has at least one undercut which partially revolves the piston and which is reinforced by means of at least one rib.
- a partially circulating undercut leads to a Reducing the weight of the piston and the at least one rib in the at least one region of the partially circumferential undercut simultaneously achieves a high rigidity of the piston.
- a partially circumferential undercut in the region of the piston crown extends around a single box wall of the piston, wherein the undercut is arranged opposite the box wall in the direction of the piston outside.
- the partially circumferential undercut may have an elongated, oval, round, teardrop-shaped and / or any other shape.
- the rib may have a bead shape, wall shape, seam shape or the like.
- the rib is arranged exclusively in the region of the partially circumferential undercut.
- a rib is also arranged outside the region of the partially circumferential undercut.
- the rib has the same or alternatively a corresponding configuration as the rib, which is arranged in the region of the partially circumferential undercut.
- the rib, arranged in the region of the partially circumferential undercut fits into the rib, arranged outside the region of the partially circulating undercut, fitting over, so that a single rib thus forms in the piston.
- a course in the direction of the course of the pin bosses is a course which runs perpendicular to the connection axis between the pressure side and the counterpressure side of the piston.
- a course parallel to the course of the piston crown defines a course to a plane which runs parallel to the surface of the piston top in the region of the piston crown.
- a waveform is to understand a course that is parallel to the course of the piston crown when viewed in the direction of the course of the pin bosses characterized in that the edge of the rib in the direction of pin bosses valleys and heights parallel to the piston head, the same and / or may be different. Furthermore, such a wave-shaped course may be periodic or aperiodic.
- a sinusoidal wave-like course is also known by the term omega-shaped course. In a symmetrical course of the rib in the piston creates a symmetrical piston.
- a profile transverse to the course of the piston crown defines a profile to a plane which extends transversely to the surface of the piston top in the region of the piston crown.
- the course of the rib in the direction of the course of the pin bosses is different transversely and / or parallel to the course of the piston crown, so that an asymmetric piston is formed.
- the profile of the rib is asymmetric wave-like, preferably asymmetric sinusoidally wave-like, in an asymmetrical piston.
- the rib has the same dimensions in its course, so that an approximately symmetrical piston is formed.
- the dimensions of the rib refers to the length of the rib relative to the piston head in the direction of the connecting rod, that is, piston underside, and / or to the thickness of the rib relative to a plane perpendicular to the lifting axis.
- An approximately symmetrical piston thus results from the fact that the length of the rib and / or the thickness of the rib are the same for corresponding areas in the piston.
- an approximately symmetrical piston is formed by the fact that, in the case of a plurality of ribs, these are equal to one another in the corresponding regions.
- the dimensions of the rib in its course between the pressure side and counter-pressure side are different, so that an asymmetric piston is formed. Consequently, an asymmetrical piston arises because the rib has uneven dimensions in its course.
- an asymmetrical piston is created by varying the dimensions of a plurality of different ribs in a piston.
- the thickness of the rib in its course between the pressure side and counter-pressure side is the same, so that an approximately symmetrical piston is formed.
- the thickness of the rib in its course between the pressure side and counter-pressure side is different, so that an asymmetric piston is formed.
- connection region is a region between the annular field region and the piston crown region of the piston, this region being respectively related to the rear wall of the annular field region and the piston crown region.
- the connection region is designed to be suitable for controlling the different lateral forces on the piston and / or the deformations of the piston during operation in an internal combustion engine.
- the connection in the connection region preferably has at least one radius and / or at least one specific dimension.
- the at least one connection is different from the region of the annular field to the region of the piston crown, so that an asymmetrical piston is produced.
- the connection area on the side of the pressure side of the piston is larger in size, that is thicker, than the connection area on the side of the counter-pressure side, so that thereby occurring during operation of the piston lateral forces on the piston and / or deformations of the piston are better controlled.
- the piston consists of at least two components, wherein a component has at least one piston head and the other component at least the box walls, wherein the area between the box walls and the piston head has at least one type of connection.
- a two-part piston can be connected for example by means of a friction-welded connection, screw connection, press connection and / or the like.
- the piston inner mold can be produced by means of a one-piece core, in particular castable.
- a particularly simple and rapid production of the inner piston mold in the piston for example by means of the casting process is possible by, for example, the piston inner mold is molded directly by means of a one-piece moldable core during the casting of the entire piston.
- the connecting rod has a trapezoidal shape in the region of the connecting-rod eye, wherein this connecting-rod eye receives the piston pin.
- the shape of the connecting rod determines the shape and position of the respective box wall in the piston.
- the connecting rod has two connecting rod eyes, of which the smaller in its dimensions connecting rod eye receives the piston pin. In the area of the smaller connecting rod eye, the connecting rod has a trapezoidal shape.
- the angle of the trapezoidal shape of the connecting rod between 8 ° and 25 °, preferably between 15 ° and 20 °, per trapezoidal side extends.
- FIG. 1 shows a section of a piston in a side view in section
- Figure 2 a section of the piston in a view from Pleueloplasty in the direction
- Figure 3 a section of the piston in a view from Pleueloplasty in the direction
- Figure 4 a simplified representation of the course of the ribs
- a piston 1 of an internal combustion engine is shown in simplified form as a section.
- Figures 1 to 3 only the left side of the piston 1 is shown.
- the piston 1 is shown in side view in section, wherein the cutting plane passes through a lifting axis 6 of the piston.
- the A-A section and B-B section respectively extend through a plane which is spanned by a pin axis 8 and a transverse axis 7 of the piston 1 and is displaced parallel thereto.
- the transverse axis 7 runs perpendicular to the pin axis 8 and the lifting axis 6.
- the piston 1 is designed as a piston for an Otto internal combustion engine, wherein the piston 1 is formed as a one-piece component.
- the piston 1 has a piston bottom 2.
- the piston head 2 of the piston 1 in this case has a piston 1 completely circulating (simplified illustrated) ring field 3.
- the piston 1 in the embodiment the same connections in the region of the rear wall of the region of the ring field 3 to the region of the piston head 2 out over the circumference of the piston 1 seen on.
- the connection region 14 is the region between the respective rear wall of ring field 3 and piston crown 2.
- the connection in the connection region 14 is formed as a radius.
- the piston 1 has a shaft part arranged on the piston head 2, the shaft part in the exemplary embodiment having two load-bearing parts Shaft wall sections 4a, 4b has.
- the one shaft wall portion 4a forms the pressure side in the embodiment and the other sheep wall portion 4b forms the counter-pressure side in the embodiment.
- the two supporting shaft wall sections 4a, 4b are connected to each other over two opposite the piston outer diameter past inclined box walls 5.
- a pin hub 9 for receiving a piston pin (not shown) is arranged in each case.
- the inner surface of the pin boss 9 relative to the center of the piston that is, the lifting axis 6, flush with the surface of the associated box wall 5.
- the respective pin boss 9 in the direction of the piston center that is in Direction Hubachse 6, bounded by the associated box wall 5, wherein according to Figures 1 to 3, the pin boss 9 does not protrude from the associated box wall 5.
- the pin boss 9 is thus an integral part of the associated box wall 5 in the direction of the center of the piston 1.
- the pin boss 9 protrudes from the associated box wall 5 in the direction of the piston outside. Furthermore, according to FIG. 1, the pin boss 9 protrudes from the directly opposite side of the piston head 2, that is to say from the piston head 2 in the direction of the connecting rod relative to the direction of the lifting axis 6 on the box wall 5 out of the box wall 5. Consequently, the pin boss 9 protrudes from the respective associated box wall 5 from the latter on the underside of the piston according to FIG.
- the box wall 5 in the course transverse to the direction of the pin boss 9, that is transversely to the pin axis 8 and perpendicular to the lifting axis 6, a concave profile.
- the two box walls 5 have a mirror-image corresponding concave profile such that approximately a uniform X-shape according to FIG. 4 results from the two box walls 5. This creates an approximately symmetrical piston. 1
- the width b of the box walls 5 is the same between the pressure side and the counterpressure side, so that an approximately symmetrical piston 1 is thereby also produced.
- the collar 1 1 transverse to the direction of the course of the bolt axis 8, that is thus in the direction of the transverse axis 7, and parallel to the course of the box walls 5 the same dimensions, so that equal federal characteristics between pressure side and counter-pressure side result, which also an approximately symmetrical piston 1 is formed.
- the section angle 10 formed between each of the skirt wall sections 4a, 4b is the same between the pressure side and the counterpressure side, so that a uniform profile of the X-shape of the box walls 5 is produced, and thus also an approximately symmetrical piston 1 is formed.
- the section angle 10 is thereby clamped between the lifting axis 6 and the contact points between the respective box wall 5 and the respective skirt wall section 4a, 4b according to FIG.
- the dimensions of the two shaft wall sections 4a, 4b relative to the piston head 2 in the direction of the connecting rod with respect to the lifting axis 6 are the same, so that an approximately symmetrical piston 1 is formed.
- FIG. 1 the dimensions of the two shaft wall sections 4a, 4b relative to the piston head 2 in the direction of the connecting rod with respect to the lifting axis 6 are the same, so that an approximately symmetrical piston 1 is formed.
- the thickness d of the two shaft wall sections 4a, 4b is the same between the pressure side and the counterpressure side, so that as a result an approximately symmetrical piston 1 is also formed.
- the X-shape of the two box walls 5 is formed according to the foregoing in the range of about the ring field 3 to the piston bottom.
- the piston head 2 has two undercuts 12 that partially surround the piston 1.
- the two undercuts 12 extend in the piston head 2 each with a constant radius about the lifting axis 6 radially in the region of the piston outside around the associated box wall 5 around.
- the respective partially circulating undercut 12 is arranged in each case only around the associated box wall 5 in the region of the piston outer side according to FIGS. 2 and 3 in the piston 1.
- the piston 1 has two ribs 13, which reinforce the two partially circulating undercuts 12 in the piston head 2 and thereby interrupt the respective circulation of the partially circulating undercut 12 by means of the respective rib 13 according to FIGS. 2 and 3.
- the respective partially circulating undercut 12 is limited by the associated box wall 5 in circulation according to Figures 2 and 3.
- the ribs 13 are arranged in each case in the region and additionally also outside the region of the partially circumferential undercut 12 so as to be suitable for one another.
- the two ribs 13 drawn in FIGS. 2 and 3 have the same dimensions in their embodiment so that an approximately symmetrical piston 1 is produced.
- a thickness k of the two ribs 13 is also shown. The thickness k of the respective rib 13 is equal in its course between the pressure side and counter-pressure side, so that an approximately symmetrical piston 1 is formed.
- the ribs 13 according to Figure 2 and Figure 3 in the direction of the course of the pin bosses 9, ie in Bolzenachscardi, parallel to the course of the piston head 2 in the exemplary embodiment about a sinusoidal wave-like course, which is also periodically in the embodiment.
- This sinusoidal waveform is periodic in the embodiment.
- the course transverse to the piston head 2 refers to the direction of the lifting axis. 6
- the piston 1 according to the invention is shown in a view from the piston underside in the direction of the piston head 2 with respect to the lifting axis 6 shown simplified, so that the approximately sinusoidal wave-like course of the two ribs 13 with respect to the two box walls 5 and the piston head 2 is clear. Further, the X-shape of the concave box walls 5 becomes clear.
- the approximately symmetrical piston 1 illustrated in the exemplary embodiment according to FIGS. 1 to 4 can be formed, for example, by different section angles 10 between pressure side and counterpressure side, different dimensions of the shaft wall sections 4a, 4b, different thicknesses d of the shaft wall sections 4a, 4b between pressure side and counterpressure side, different widths b Box walls 5 between the pressure side and counter-pressure side, different dimensions of the collar 1 1 transverse to the direction of the course of the pin boss 9 and parallel to the course of the box walls 5, different courses of the ribs 13 in the direction of the course of the pin bosses 9 transversely and / or parallel to the course of the piston crown 2, different connections from the region of the rear wall of the ring field 3 to the region of the rear wall of the piston crown 2 and / or formed by different dimensions of the ribs 13 in the course between pressure side and counter-pressure side as asymmetric piston 1 s one.
- Such asymmetric piston 1 is not shown in Figures 1 to 4.
- the internal combustion engine also has a connecting rod (not shown in FIGS. 1 to 4) which cooperates with the previously described piston 1 and has a shape to which the concave profile of the respective box wall 5 of the piston 1 is correspondingly adapted.
- the connecting rod further comprises a connecting rod for receiving a piston pin.
- the connecting rod has a further connecting rod eye, which receives the crankshaft of the internal combustion engine in the embodiment.
- the connecting rod eye for receiving the piston pin is in the embodiment smaller in its diameter relative to the connecting rod eye that receives the crankshaft.
- the connecting rod further has a trapezoidal shape in the region of the smaller connecting rod, this smaller connecting rod eye receives the piston pin, so that the connecting rod by means of a piston pin which is inserted through the pin bosses 9 of the piston 1 and the smaller connecting rod eye of the connecting rod on the piston 1 or the box walls 5 is movably arranged (not in the Figures 1 to 4 shown).
- the connecting rod preferably has a straight trapezoidal shape in the region of the smaller connecting rod eye.
- a straight trapezoidal shape means that the surfaces of the trapezoid are straight.
- the box wall 5 is concavely curved in its course.
- the smallest distance between the respective box wall 5 and trapezoidal connecting rods in the region of the smaller connecting rod eye can be determined.
- the shape of the respective box wall 5 is adjusted.
- the connecting rod has a trapezoidal shape which extends between 8 ° and 25 °, preferably between 15 ° and 20 °, per trapezoid side. The angle is measured between the longer of the two parallel sides of the trapezoid and one side of the trapezoid.
- the pin boss 9 of the respective box wall 5 also has such a corresponding trapezoidal shape.
- the box walls 5 in the area of the piston head 2 have approximately a profile parallel to the lifting axis 6 in the direction of the lifting axis 6 and viewed in the region of the respective pin boss 9 a course adapted to the connecting rod axis in the direction of the lifting axis 6. The one area goes into the other area appropriately.
- the shape of the trapezoidal Pleuelnabenschräge approximately equal to or exactly equal to the shape of the respective pin boss 9 and the associated box wall.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011085448A DE102011085448A1 (en) | 2011-10-28 | 2011-10-28 | Piston and connecting rod for an internal combustion engine |
PCT/EP2012/065209 WO2013060498A1 (en) | 2011-10-28 | 2012-08-03 | Piston and connecting rod for an internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2771558A1 true EP2771558A1 (en) | 2014-09-03 |
EP2771558B1 EP2771558B1 (en) | 2023-11-01 |
Family
ID=46604339
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12743171.6A Active EP2771558B1 (en) | 2011-10-28 | 2012-08-03 | Piston and connecting rod for an internal combustion engine |
Country Status (4)
Country | Link |
---|---|
US (1) | US20150027401A1 (en) |
EP (1) | EP2771558B1 (en) |
DE (1) | DE102011085448A1 (en) |
WO (1) | WO2013060498A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
PL3334918T3 (en) * | 2015-08-11 | 2025-03-24 | Ks Kolbenschmidt Gmbh | PISTONS FOR COMBUSTION ENGINE |
DE102015217911A1 (en) | 2015-09-18 | 2017-03-23 | Mahle International Gmbh | Piston for an internal combustion engine |
EP3612727A1 (en) | 2017-04-19 | 2020-02-26 | KS Kolbenschmidt GmbH | Piston with a structured design |
WO2019096827A1 (en) | 2017-11-14 | 2019-05-23 | Ks Kolbenschmidt Gmbh | Steel piston with optimized design |
DE102018203226A1 (en) * | 2018-03-05 | 2019-09-05 | Federal-Mogul Nürnberg GmbH | Piston for an internal combustion engine |
US12209551B2 (en) | 2019-07-19 | 2025-01-28 | Ks Kolbenschmidt Gmbh | Friction loss-reduced piston for an internal combustion engine |
Family Cites Families (14)
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GB130411A (en) * | 1918-02-18 | 1919-08-07 | Harry Ralph Ricardo | Improvements in or relating to Pistons for Internal Combustion Engines. |
FR782736A (en) * | 1934-12-14 | 1935-06-11 | Improvements to pistons fitted with internal reinforcement fins | |
US5076225A (en) * | 1989-12-28 | 1991-12-31 | Toyota Jidosha Kabushiki Kaisha | Piston for an internal combustion engine |
JPH1136978A (en) * | 1997-07-16 | 1999-02-09 | Unisia Jecs Corp | Piston of internal combustion engine |
JPH11303674A (en) * | 1998-04-24 | 1999-11-02 | Unisia Jecs Corp | Piston for internal combustion engine |
DE10145589B4 (en) | 2001-09-15 | 2006-09-14 | Ks Kolbenschmidt Gmbh | Piston for an internal combustion engine |
ATE305088T1 (en) * | 2002-03-25 | 2005-10-15 | Brp Rotax Gmbh & Co Kg | PISTONS |
DE10325917A1 (en) * | 2003-06-07 | 2005-03-31 | Mahle Gmbh | Piston for an internal combustion engine and casting process for its production |
DE102005043747A1 (en) * | 2005-09-14 | 2007-03-22 | GM Global Technology Operations, Inc., Detroit | Piston for an internal combustion engine |
DE102005061898A1 (en) * | 2005-12-23 | 2007-06-28 | Mahle International Gmbh | Piston connecting rod assembly for an internal combustion engine |
DE102007020447A1 (en) * | 2007-04-27 | 2008-10-30 | Mahle International Gmbh | Piston for an internal combustion engine |
DE102007058789A1 (en) * | 2007-12-06 | 2009-06-10 | Federal-Mogul Nürnberg GmbH | Casting piston with support ribs and method for producing such a piston |
JP2010164012A (en) * | 2009-01-19 | 2010-07-29 | Suzuki Motor Corp | Piston for internal combustion engine |
JP2011185214A (en) * | 2010-03-10 | 2011-09-22 | Honda Motor Co Ltd | Internal combustion engine |
-
2011
- 2011-10-28 DE DE102011085448A patent/DE102011085448A1/en not_active Ceased
-
2012
- 2012-08-03 WO PCT/EP2012/065209 patent/WO2013060498A1/en active Application Filing
- 2012-08-03 EP EP12743171.6A patent/EP2771558B1/en active Active
- 2012-08-03 US US14/354,789 patent/US20150027401A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
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See references of WO2013060498A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2013060498A1 (en) | 2013-05-02 |
EP2771558B1 (en) | 2023-11-01 |
US20150027401A1 (en) | 2015-01-29 |
DE102011085448A1 (en) | 2013-05-02 |
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