EP0327595B1 - Piston en alliage leger monobloc de faible poids et a faible frottement pour moteurs a combustion interne - Google Patents
Piston en alliage leger monobloc de faible poids et a faible frottement pour moteurs a combustion interne Download PDFInfo
- Publication number
- EP0327595B1 EP0327595B1 EP88900342A EP88900342A EP0327595B1 EP 0327595 B1 EP0327595 B1 EP 0327595B1 EP 88900342 A EP88900342 A EP 88900342A EP 88900342 A EP88900342 A EP 88900342A EP 0327595 B1 EP0327595 B1 EP 0327595B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- equal
- area
- height
- ring
- 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.)
- Expired - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract 6
- 239000002184 metal Substances 0.000 title claims description 10
- 229910052751 metal Inorganic materials 0.000 title claims description 10
- 239000000463 material Substances 0.000 claims abstract description 13
- 230000001050 lubricating effect Effects 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 8
- 241001125879 Gobio Species 0.000 claims 6
- 230000013011 mating Effects 0.000 claims 2
- 239000000314 lubricant Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
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
- F02F3/02—Pistons having means for accommodating or controlling heat expansion
- F02F3/04—Pistons having means for accommodating or controlling heat expansion having expansion-controlling inserts
- F02F3/08—Pistons having means for accommodating or controlling heat expansion having expansion-controlling inserts the inserts being ring-shaped
-
- 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
-
- 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
- F02F2200/00—Manufacturing
- F02F2200/06—Casting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/02—Light metals
- F05C2201/021—Aluminium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/04—Heavy metals
- F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
- F05C2201/0448—Steel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2251/00—Material properties
- F05C2251/04—Thermal properties
- F05C2251/042—Expansivity
Definitions
- the invention relates to a light metal piston according to the preamble of patent claim 1.
- the object of the invention is to significantly reduce the running noise in the aforementioned known light and low-friction pistons, each with extremely short shaft lengths, in particular in the start-up and part-load range.
- the ring inserts in the piston head proposed in claims 19-21 differ from similar inserts described in EP-A 0 210 649 particularly in that they do not, as in that prior art, in the top land area above the ring grooves, but only in the radial area are arranged within the ring grooves. As a result, they can act directly on the area of the ring webs on which the tightest possible running play should be predeterminable, even when cold, by restricting the thermal expansion.
- the ring webs between the piston ring grooves 2, 3, 4 and the shaft area F in the case of a piston that is warm from engine operation have approximately the same running clearance with respect to the cylinder raceway.
- the exact course of the piston outer surface is shown in Fig. 4.
- the values relate to a particularly advantageous embodiment of the piston shown in FIGS. 1-3 for use in a cast iron cylinder.
- the piston outer shape in the pressure-counter pressure direction (DR-GDR) is particularly important, to which the running cycles specified in the claims are based.
- the piston When the engine is warm, the piston simultaneously slides in the area F and on the first and second ring land on the cylinder barrel, i.e. the piston is guided in these areas.
- This piston guidance which takes place in two axially separated areas, is extremely important for a low-noise piston run. Because in order to achieve low-noise running, the piston must be guided in an axially sufficiently high area in such a way that piston tilting triggered by the connecting rod deflection can be largely avoided. In the case of flat pistons with correspondingly low stem heights, this requirement usually presents an unsolvable problem.
- the invention remedies that the ring lands are used for piston guidance. This takes place in that the cold play there, in contrast to the previously known prior art, is designed such that the warm play there corresponds approximately to that warm play in the area F.
- the shaft areas lying above and below the piston run area F are tapered back to the extent shown in FIG. 4 in order to bring about a hydrodynamic floating of the piston shaft in these areas.
- the piston outer shape is entered in the pressure-counter pressure direction and in the pin direction.
- the areas in between of the outer piston shape continuously merge into the dimensions of those two main directions.
- a further improvement is brought about by the introduction of a strip-shaped insert in the form of either a closed steel ring 9 or a pair of ring segment insert 10 in the piston head in the region radially behind the ring grooves 2, 3, 4.
- a strip-shaped insert in the form of either a closed steel ring 9 or a pair of ring segment insert 10 in the piston head in the region radially behind the ring grooves 2, 3, 4.
- the insert or inserts 9, 10 is or are essentially limited to the area below the top land area. In the direction of the shaft end, the inserts 9, 10 can each protrude from the piston crown material. This is useful, because in this way the inserts can be fixed relatively easily in the mold used to manufacture the piston.
- FIG. 6 shows a different course of the ring 9 in the area of the hubs 6 of the piston.
- the ring 9 runs within the hubs 6 in the vicinity of the outer circumference, while in FIG. 6b it runs straight through the hub area in a radially inner area in a chord-like manner.
- ring segments 10 are introduced into the piston head regions lying between the hubs 6, these ring segments 10 reaching into the hubs 6 in each case.
- the ring segments 10 are also connected in one piece to the shaft inserts 7.
- the thermal expansion-inhibiting effect of the inserts 9, 10 is based essentially on the fact that the piston base material lying radially on the outside of the inserts shrinks onto the inserts during the production of the piston, for example when it is cast, when the piston material cools down.
- the shrinkage stress must first be reduced before an actual expansion can take place.
- a spacing of the inserts 9, 10 from the piston crown surface is necessary in order to allow the heat to flow from the piston crown to the piston rings.
- the radial slot between the piston head and the shaft is favorable for low shaft clearances.
- a cold clearance of 1.5 per mille and on the upper ring land can be made in the piston head on the lower ring land (below the ring groove 3) achieve that of 2.2 per thousand based on the diameter of the piston.
- the top land of the piston head is not used to guide the piston.
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
Claims (22)
caractérisé au moyen des caractéristiques suivantes:
piston caractérisé au moyen des caractéristiques suivantes:
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3644188 | 1986-12-23 | ||
DE3644188 | 1986-12-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0327595A1 EP0327595A1 (fr) | 1989-08-16 |
EP0327595B1 true EP0327595B1 (fr) | 1990-04-25 |
Family
ID=6317068
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88900342A Expired - Lifetime EP0327595B1 (fr) | 1986-12-23 | 1987-12-16 | Piston en alliage leger monobloc de faible poids et a faible frottement pour moteurs a combustion interne |
Country Status (6)
Country | Link |
---|---|
US (1) | US5048398A (fr) |
EP (1) | EP0327595B1 (fr) |
JP (1) | JP2716492B2 (fr) |
BR (1) | BR8707926A (fr) |
DE (1) | DE3762445D1 (fr) |
WO (1) | WO1988004724A1 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0449848B1 (fr) * | 1988-12-24 | 1994-02-09 | Mahle GmbH | Pisotn plongeur leger pour moteurs a combustion interne |
DE3931949A1 (de) * | 1989-09-25 | 1991-04-04 | Alcan Gmbh | Kolben fuer einen verbrennungsmotor |
DE4110306A1 (de) * | 1990-09-20 | 1992-03-26 | Mahle Gmbh | Tauchkolben aus leichtmetall fuer ottomotoren |
US20060027095A1 (en) * | 2004-08-02 | 2006-02-09 | Miller Andrew J | Piston having centered pin hole and skirt profile |
DE102012212791B4 (de) * | 2012-07-20 | 2014-02-27 | Federal-Mogul Nürnberg GmbH | Verfahren zur Herstellung eines Kolbens für einen Verbrennungsmotor |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1078387B (de) * | 1957-12-12 | 1960-03-24 | Schmidt Gmbh Karl | Aluminiumkolben mit im Schaft eingegossenen gekruemmten Regelgliedern |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB608142A (en) * | 1945-11-20 | 1948-09-10 | Specialloid Ltd | Improvements in and relating to pistons |
CH437915A (de) * | 1965-01-23 | 1967-06-15 | Mahle Kg | Leichtmetallkolben für Brennkraftmaschinen |
DE1600513A1 (de) * | 1967-04-22 | 1970-04-02 | Mahle Kg | Leichtmetallkolben mit Regelgliedern |
JPS5138375B2 (fr) * | 1973-03-20 | 1976-10-21 | ||
DE3430132A1 (de) * | 1984-08-16 | 1986-02-27 | Mahle Gmbh, 7000 Stuttgart | Aluminium-tauchkolben fuer verbrennungsmotoren mit regelstreifen |
DE3430258A1 (de) * | 1984-08-17 | 1986-02-27 | Mahle Gmbh, 7000 Stuttgart | Tauchkolben fuer verbrennungsmotoren |
DE3446121A1 (de) * | 1984-12-18 | 1985-08-01 | Mahle Gmbh, 7000 Stuttgart | Leichter extrem flacher tauchkolben fuer verbrennungsmotoren |
IT1182507B (it) * | 1985-07-12 | 1987-10-05 | Ae Borgo Spa | Pistoni con profilo asimmetrico per motori a combustione interna |
JPH0415968Y2 (fr) * | 1985-10-18 | 1992-04-09 | ||
US4864986A (en) * | 1988-09-26 | 1989-09-12 | Brunswick Corporation | Two-cycle engine with offset piston ovality |
-
1987
- 1987-12-16 DE DE8888900342T patent/DE3762445D1/de not_active Expired - Fee Related
- 1987-12-16 EP EP88900342A patent/EP0327595B1/fr not_active Expired - Lifetime
- 1987-12-16 US US07/368,298 patent/US5048398A/en not_active Expired - Fee Related
- 1987-12-16 WO PCT/DE1987/000593 patent/WO1988004724A1/fr active IP Right Grant
- 1987-12-16 BR BR8707926A patent/BR8707926A/pt not_active IP Right Cessation
- 1987-12-16 JP JP63500507A patent/JP2716492B2/ja not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1078387B (de) * | 1957-12-12 | 1960-03-24 | Schmidt Gmbh Karl | Aluminiumkolben mit im Schaft eingegossenen gekruemmten Regelgliedern |
Also Published As
Publication number | Publication date |
---|---|
JP2716492B2 (ja) | 1998-02-18 |
BR8707926A (pt) | 1989-10-31 |
DE3762445D1 (de) | 1990-05-31 |
JPH02501758A (ja) | 1990-06-14 |
US5048398A (en) | 1991-09-17 |
WO1988004724A1 (fr) | 1988-06-30 |
EP0327595A1 (fr) | 1989-08-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE4112889C2 (de) | Verfahren zur Herstellung eines Kolbenkopfes mit Kühlung für einen mehrteiligen, gegliederten Kolben für Verbrennungsmotore, sowie danach hergestellter Kolbenkopf | |
DE4314892B4 (de) | Kolbenbaugruppe | |
EP1954966B1 (fr) | Piston pourvu d'un évidement radial périphérique place en dessous d'une rainure annulaire | |
EP0356457B1 (fr) | Piston plongeur en metal leger pour moteurs a combustion interne | |
DE3604661C2 (fr) | ||
DE3518721A1 (de) | Oelgekuehlter, mehrteiliger tauchkolben einer brennkraftmaschine | |
DE1601388B2 (de) | Dichtungsanordnung fuer einen kolben einer brennkraftmaschine | |
CH660407A5 (de) | Dichtring fuer kolbenstangen. | |
AT402327B (de) | Kolben für eine brennkraftmaschine | |
WO1997033108A1 (fr) | Garniture d'etancheite du piston annulaire d'un dispositif hydraulique de debrayage d'un accouplement | |
DE2843658A1 (de) | Oelfilmlager | |
EP0189767B1 (fr) | Piston à plusieurs parties, refroidi par de l'huile, pour moteurs à combustion interne à piston alternatif | |
DE4343238B4 (de) | Nasse Zylinderlaufbuchse | |
EP0250790A1 (fr) | Machine à piston | |
EP0402623A1 (fr) | Piston pour machines à piston axial | |
DE69506386T2 (de) | Achse für zweiteiligen kolben | |
DE2325000A1 (de) | Dichtung fuer hydraulische kolben oder kolbenstangen | |
EP0327595B1 (fr) | Piston en alliage leger monobloc de faible poids et a faible frottement pour moteurs a combustion interne | |
EP0171568B1 (fr) | Piston pour moteur à combustion interne avec bague d'expansion | |
WO1990007642A1 (fr) | Pisotn plongeur leger pour moteurs a combustion interne | |
DE3609019C1 (en) | Method for the production of the hub hole of a trunk piston, particularly for internal combustion engines | |
DE3926185C2 (de) | Lagerschale für Radialkolbenmaschine | |
DE102016113678B4 (de) | Einteiliger Ölabstreifring | |
DE3720947A1 (de) | Nockenwellenanordnung | |
DE10123965B4 (de) | Nadellager |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19890407 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB IT |
|
17Q | First examination report despatched |
Effective date: 19890927 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB IT |
|
ET | Fr: translation filed | ||
ITF | It: translation for a ep patent filed | ||
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) | ||
REF | Corresponds to: |
Ref document number: 3762445 Country of ref document: DE Date of ref document: 19900531 |
|
PLBI | Opposition filed |
Free format text: ORIGINAL CODE: 0009260 |
|
26 | Opposition filed |
Opponent name: ALCAN DEUTSCHLAND GMBH Effective date: 19910124 |
|
ITTA | It: last paid annual fee | ||
PLBM | Termination of opposition procedure: date of legal effect published |
Free format text: ORIGINAL CODE: 0009276 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: OPPOSITION PROCEDURE CLOSED |
|
27C | Opposition proceedings terminated |
Effective date: 19920529 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20011101 Year of fee payment: 15 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20011220 Year of fee payment: 15 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20011227 Year of fee payment: 15 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20021216 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030701 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20021216 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20030901 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20051216 |