WO1986001858A1 - Improvements in or relating to pistons - Google Patents
Improvements in or relating to pistons Download PDFInfo
- Publication number
- WO1986001858A1 WO1986001858A1 PCT/GB1985/000416 GB8500416W WO8601858A1 WO 1986001858 A1 WO1986001858 A1 WO 1986001858A1 GB 8500416 W GB8500416 W GB 8500416W WO 8601858 A1 WO8601858 A1 WO 8601858A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gudgeon pin
- piston
- arcuate skirt
- skirt portion
- axis
- Prior art date
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
-
- 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
- F02F3/027—Pistons having means for accommodating or controlling heat expansion the skirt wall having cavities
-
- 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
- F02F3/0076—Pistons the inside of the pistons being provided with ribs or fins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J1/00—Pistons; Trunk pistons; Plungers
- F16J1/02—Bearing surfaces
-
- 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
Abstract
A piston comprises a crown (10) and a ring band (11) carried on two gudgeon pin bosses (12a, 12b) by two supports (20). There are upper and lower pairs of struts (21a, 21b, 21c, 21d) on each side of the gudgeon pin bosses, one strut of each pair projecting from one gudgeon pin boss and the other strut of each pair projecting from the other gudgeon pin boss. Each pair carries a respective arcuate skirt portion (22) which extends only part the way round the and is symmetrical about a plane including the piston axis (28) and normal to the gudgeon pin bore axis. There are thus axially and circumferentially extending gaps (25) of constant axial width both between the upper arcuate skirt portions and the ring band and between the upper arcuate skirt portions and the lower arcuate skirt portions. This provides a lightweight piston which is very conformable and can be fitted tightly in an associated cylinder or liner to reduce noise.
Description
IMPROVEMENTS IN OR RELATING TO PISTONS
The invention relates to a piston for an internal combustion engine comprising a crown, a piston axis, a ring band extending around the crown, gudgeon pin bosses supporting the crown and defining a gudgeon pin bore having an axis, and a skirt.
The purpose of the skirt is to transmit lateral thrust forces from the piston to an associated cylinder or liner. In many pistons, the skirt is formed by a generally cylindrical surface extending around the piston and depending from the ring band for lubricated contact with the associated cylinder or liner. Such a skirt has the disadvantage that the oil film between the skirt and the associated cylinder or liner is of substantial area and so the frictional forces generated by such film are also substantial. In addition, such a skirt is comparatively rigid and this requires the skirt to be a comparatively loose fit in the associated cylinder or liner in order to accommodate changes in piston and cylinder shape due to temperature changes, since the rigidity of the skirt does not allow the skirt to flex to accommodate such changes. Such a loose fit increases the incidence of piston slap so increasing noise.
There have been various proposals for reducing the load transmitting skirt area, to reduce the frictional forces, but some of these proposals have not provided adequate lubrication of these reduced area. In addition, others of these proposals have not dealt with the problem of the rigidity of these skirt areas.
According to a first aspect of the invention, there is provided a piston for an internal combustion engine comprising a crown, a piston axis, a ring band extending around the crown, gudgeon pin bosses supporting. the crown and defining a gudgeon pin bore having an axis and a skirt characterised in that the skirt is formed by two pairs of arcuate skirt portions on opposite sides of the gudgeon pin bore, the arcuate skirt portions of each pair being connected to the gudgeon pin bosses and including at least one upper arcuate skirt portion adjacent to but spaced from the ring band by a gap, and at least one lower arcuate skirt portion spaced from said at least one upper arcuate skirt portion by an axially and circumferentially extending gap, each arcuate skirt portion being disposed about a plane including the piston axis and normal to the gudgeon pin bore axis and extending only partially around the piston.
The following is a more detailed description of two embodiments of the invention, by way of example, reference being made to the accompanying drawings in which:-
Figure 1 is a section through a first form of piston for an internal combustion engine,
Figure 2 is a section on the line II-II of Figure 1,
Figure 3 is a section of a second form of piston for an internal combustion engine, and
Figure 4 is a section on the line IV-IV of Figure 3.
Both the piston of Figures 1 and 2 and the piston of Figures 3 and 4 are made by a casting process using either an iron or a steel material, aluminium or an aluminium alloy. They are pistons for Diesel engines.
Referring now to the piston of Figures 1 and 2, this piston comprises a crown 10 surrounded by a ring band 11 and having two gudgeon pin bosses 12a, 12b. The crown 10 is provided with a depression 13 which receives a precision cast steel combustion bowl 14 having on its undersurface projections 15 which space the bowl 14 from
the depression 13 and so form an insulating air gap 16 therebetween. The combustion bowl 14 is a shrink-fit in the depression. The crown 10 also has an annular outer surface which is spray-coated with a suitable ceramic 17 to a depth of 2mm in order to provide a heat-resistant coating on the crown 10.
The ring band 11 depends from the crown 10 and is formed with a plurality of piston ring grooves 18. Webs 19 are provided between the crown 10 and the ring band 11 in order to provide a ring band with the required rigidity.
A support 20 extends upwardly from each gudgeon pin boss 12a, 12b and is connected to the undersurface of the depression 13 in order to support the crown 10 and the ring band 11 on the gudgeon pin bosses 12a, 12b. Each gudgeon pin boss 12a, 12b is also formed with four struts 21a, 21b, 21c, 21d. Two of these struts 21a, 21b extend upwardly and outwardly from the associated gudgeon pin boss 12a, 12b on opposite sides thereof (see Fig.2). The other two struts 21c, 21d extend downwardly and outwardly from the associated boss 12a, 12b on opposite sides thereof (see also Fig.2). Thus, on each side of the gudgeon pin bosses, there are, considering both bosses, a pair of upwardly and outwardly directed struts 21a or 21b
and a pair of downwardly and outwardly directed struts 21a or 21c.
Each pair of struts 21 carries an associated arcuate skirt portion 22. Each arcuate skirt portion 22 has circumferentially extending upper and lower edges 23, 24 which lie in respective planes normal to the piston axis 26. These circumferential edges 23, 24 are interconnected by side edges 26 which lie in respective planes including a piston axis so that each arcuate skirt portion 22 is the shape of a segment of a cylinder. Each arcuate skirt portion 22 is symmetrically disposed about a plane including the piston axis and normal to the gudgeon pin bore axis (the plane of the section of Fig.2) and is of limited arcuate extent. This extent may be between 70° and 110° but is preferably 80°.
There is thus an axially and circumferentially extending gap 25 both between the upper edges 23 of the upper arcuate skirt portions 22 and between the lower edges 24 of the upper arcuate skirt portions 22a and the upper edges of the lower arcuate skirt portions 22b. The axial width of each gap 25 is constant.
As shown in Figure 2, the axis 28 of the depression 13
and the combustion bowl 14 are symmetrical about an axis 28 which is offset from a vertical plane including the gudgeon pin bore axis 27. This is to provide a correct positioning of the combustion bowl 14 in relation to a fuel injector of the associated Diesel engine.
In use, the piston of Figures 1 and 2 reciprocates in a cylinder of an internal combustion engine, mounted on a connecting rod by a gudgeon pin extending through the gudgeon pin bosses 12a, 12b. The limited arcuate extent of the arcuate skirt portions 22 and their spaced support on the associated struts 21 allow the arcuate skirt portions 22 readily to adapt to the cross-sectional shape of an associated cylinder or liner. In addition, since the arcuate skirt portions 22 are connected to the gudgeon pin bosses 12a, 12b and are not connected directly to the crown 10, the temperature of these parts is much reduced in comparison with pistons where the skirt is connected directly to the crown.
The piston is light in weight because the traditional full cylindrical skirt is dispensed with. Due to its conf ormability, the piston can be fitted more closely within an associated cylinder or liner than conventional full-skirted pistons and this tends to reduce the
noisiness of the engine. Although the arcuate skirt portions provide a reduced area of contact between the piston and the associated cylinder or liner, in comparison with a piston having a cylindrical skirt, it has been found that these arcuate skirt portions are adequately lubricated at all times and that there is no mixed or boundary lubrication. This is due partly to the provision of wide gaps 25 which allow oil, thrown-up from the sump of the associated engine, to pass onto the cylinder liner wall. In this regard, the circumferential edges of the arcuate skirt portions may be provided with hydrodynamic ramps having a ramp angle of no more than 2°. These, in co-operation with the associated cylinder or liner, provide a hydrodynamic wedge action which forces oil on the cylinder or liner over the bearing surfaces of the acruate skirt portions and thus ensures hydrodynamic lubrication under all conditions.
Referring next to Figures 3 and 4, parts common to Figures 1 and 2 and to Figures 3 and 4 will be given the same reference numerals and will not be described in detail. In this embodiment, the crown 10 is not insulated by any ceramic material and the combustion bowl 29 is formed directly in the crown surface. In use, this piston operates in substantially the same way as the piston of
Figures 1 and 2.
Claims
1. A piston for an internal combustion engine comprising a crown (10), a piston axis (28), a ring band (11) extending around the crown, gudgeon pin bosses (12a, 12b) supporting the crown and defining a gudgeon pin bore having an axis, and a skirt, characterised in that the skirt is formed by two pairs of arcuate skirt portions (22) on opposite sides of the gudgeon pin bore, the arcuate skirt portions (22) of each pair being connected to the gudgeon pin bosses (12a, 12b) and including at least one upper arcuate skirt portion (22a) adjacent to but spaced from the ring band (11) by a gap (25) and at least one lower arcuate skirt portion (22b) spaced from said at least one upper arcuate skirt portion by an axially and circumferentially extending gap (25), each arcuate skirt portion being disposed about a plane including the piston axis (28) and normal to the gudgeon pin bore axis and extending only partially around the piston.
2. A piston according to claim 1, characterised in that each arcuate skirt portion has upper and lower edges (23, 24) each lying in a respective plane normal to the piston axis (28) so that the gap (25) between the ring band (11)
and each at least one upper arcuate skirt portion (22a) and the gap (25) between each at least one upper arcuate skirt portion and the associated at least one lower arcuate skirt portion is of constant width in a direction parallel to the piston axis.
3. A piston according to claim 1 or claim 2, characterised in that each arcuate skirt portion has side edges (26) interconnecting said upper and lower edges with said side edges lying in respective planes including the piston axis (28).
4. A piston according to any one of claims 1 to 3, characterised in that the arcuate skirt portions are connected to the gudgeon pin bosses by struts (21a, 21b, 21c, 21d).
5. A piston according to claim 4, characterised in that each boss has four struts projecting therefrom, two (21a, 21b) of said at least four struts extending upwardly and outwardly of, and from opposite sides of, the associated gudgeon pin bosses (12a, 12b) and being connected to respective at least one upper arcuate skirt portions (22a), the two remaining struts (21c, 21d) extending downwardly and outwardly of and extending from opposite
sides of the associated gudgeon pin bosses (12a, 12b) and being connected to respective at least one lower arcuate skirt portion (22b).
6. A piston according to any one of claims 1 to 5, characterised in that each pair of arcuate skirt portions comprises a single upper arcuate skirt portion (22a) and a single lower arcuate skirt portion (22b).
7. A piston according to claim 6, characterised in that each arcuate skirt portion has an. angular extent of between 70° and 110°, preferably 80°.
8. A piston according to any one of claims 1 to 7, characterised in that the crown (10) and the ring band (11) are supported on the gudgeon pin bosses (12a, 12b) by at least two supports (20) extending upwardly from the gudgeon pin bosses.
9. A piston according to any one of claims 1 to 8, characterised in that the crown includes a combustion bowl (14) which is symmetrical about an axis (27) which is offset from a vertical plane including the gudgeon pin bore axis.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP85904653A EP0193591B2 (en) | 1984-09-12 | 1985-09-12 | Improvements in or relating to pistons |
DE8585904653T DE3567244D1 (en) | 1984-09-12 | 1985-09-12 | Improvements in or relating to pistons |
KR1019860700230A KR950000916B1 (en) | 1984-09-12 | 1985-09-12 | Piston |
JP60504103A JPH0713496B2 (en) | 1984-09-12 | 1985-09-12 | Piston improvements |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8423050 | 1984-09-12 | ||
GB848423050A GB8423050D0 (en) | 1984-09-12 | 1984-09-12 | Pistons |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1986001858A1 true WO1986001858A1 (en) | 1986-03-27 |
Family
ID=10566624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1985/000416 WO1986001858A1 (en) | 1984-09-12 | 1985-09-12 | Improvements in or relating to pistons |
Country Status (8)
Country | Link |
---|---|
US (1) | US4702151A (en) |
EP (1) | EP0193591B2 (en) |
JP (1) | JPH0713496B2 (en) |
KR (1) | KR950000916B1 (en) |
CA (1) | CA1252677A (en) |
DE (1) | DE3567244D1 (en) |
GB (2) | GB8423050D0 (en) |
WO (1) | WO1986001858A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0312162A2 (en) * | 1987-10-13 | 1989-04-19 | T&N TECHNOLOGY LIMITED | Two-stroke internal combustion engine |
EP0364810A2 (en) * | 1988-10-15 | 1990-04-25 | Wellworthy Limited | Pistons |
DE19629399A1 (en) * | 1996-07-20 | 1998-01-22 | Mahle Gmbh | Ferrous metal or aluminium piston for internal combustion engine |
US8720405B2 (en) | 2008-10-13 | 2014-05-13 | Delaware Capital Formation, Inc. | Piston with improved side loading resistance |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0415968Y2 (en) * | 1985-10-18 | 1992-04-09 | ||
DE3542800C1 (en) * | 1985-12-04 | 1987-05-14 | Mahle Gmbh | Two-part plunger, especially for internal combustion engines |
GB8606998D0 (en) * | 1986-03-20 | 1986-04-23 | Ae Plc | Pistons |
DE3609752A1 (en) * | 1986-03-22 | 1987-10-01 | Kloeckner Humboldt Deutz Ag | THERMALLY INSULATED PISTON |
JPS6373551U (en) * | 1986-10-31 | 1988-05-17 | ||
BR8700642A (en) * | 1987-02-09 | 1988-08-30 | Metal Leve Sa | ARTICULATED PLATE |
JP2561798Y2 (en) * | 1989-05-22 | 1998-02-04 | 株式会社ユニシアジェックス | Engine piston |
DE4122921C2 (en) * | 1990-07-18 | 1999-04-08 | Mahle Gmbh | Plunger pistons for internal combustion engines with a spherically oval outer shape of the piston skirt |
DE19547157A1 (en) * | 1995-12-16 | 1997-06-19 | Mahle Gmbh | Piston-cylinder assembly |
US7406941B2 (en) * | 2004-07-21 | 2008-08-05 | Federal - Mogul World Wide, Inc. | One piece cast steel monobloc piston |
US8042453B2 (en) * | 2007-08-13 | 2011-10-25 | Federal-Mogul Corporation | Piston with a skirt having oil flow slots |
US8474366B2 (en) * | 2007-08-13 | 2013-07-02 | Federal-Mogul Corporation | Piston with a skirt having oil flow slots and method of construction thereof |
EP2623760B1 (en) * | 2012-01-27 | 2017-08-02 | BRP-Rotax GmbH & Co. KG | Piston for an internal combustion engine |
US8662026B2 (en) | 2012-02-10 | 2014-03-04 | Federal-Mogul Corporation | Piston with supplemental cooling gallery and internal combustion engine therewith |
DE102012014193A1 (en) * | 2012-07-18 | 2014-05-15 | Mahle International Gmbh | Piston for an internal combustion engine |
US10151269B2 (en) | 2016-06-16 | 2018-12-11 | GM Global Technology Operations LLC | Mass efficient piston |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB201142A (en) * | 1923-04-19 | 1924-09-19 | Hermann Francois Antoine Sprin | Pistons for explosion motors |
GB266343A (en) * | 1926-02-18 | 1927-08-18 | Weiss Johann | Improvements in and relating to pistons particularly pistons for internal combustionengines |
US1774396A (en) * | 1927-03-04 | 1930-08-26 | Noble Warren | Piston |
US1842910A (en) * | 1928-04-05 | 1932-01-26 | Lister William | Piston |
US2066613A (en) * | 1926-03-01 | 1937-01-05 | Ray E Day | Piston |
GB720172A (en) * | 1950-07-25 | 1954-12-15 | Nu Strut Flexible Piston Compa | Improvements in or relating to pistons |
FR2116093A5 (en) * | 1970-11-27 | 1972-07-07 | Daimler Benz Ag | |
EP0154405A1 (en) * | 1984-02-10 | 1985-09-11 | Ae Plc | Piston for reciprocating engine |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2032849A (en) * | 1934-10-15 | 1936-03-03 | Arthur A Nelson | Piston |
FR1394022A (en) * | 1963-10-28 | 1965-04-02 | Rational light piston for engines and all machines | |
US3987709A (en) * | 1975-04-07 | 1976-10-26 | Day Ray E | Piston |
AU503148B2 (en) * | 1975-06-16 | 1979-08-23 | Cummins Engine Company, Inc | Piston with flexible heat dam |
DE2949091A1 (en) * | 1979-12-06 | 1981-06-11 | Karl Schmidt Gmbh, 7107 Neckarsulm | LIGHT METAL CONTROL PISTON |
DE3039382A1 (en) * | 1980-10-18 | 1982-04-22 | Mahle Gmbh, 7000 Stuttgart | LIGHT TACH PISTON FOR COMBUSTION ENGINES |
IT1144621B (en) * | 1981-07-31 | 1986-10-29 | Ae Borgo Spa | IMPROVEMENT RELATED TO THE ARCHITECTURE OF THE PISTONS FOR ENDOTHERMAL ENGINES |
-
1984
- 1984-09-12 GB GB848423050A patent/GB8423050D0/en active Pending
-
1985
- 1985-09-11 GB GB08522476A patent/GB2164419B/en not_active Expired
- 1985-09-12 DE DE8585904653T patent/DE3567244D1/en not_active Expired
- 1985-09-12 CA CA000490570A patent/CA1252677A/en not_active Expired
- 1985-09-12 KR KR1019860700230A patent/KR950000916B1/en not_active IP Right Cessation
- 1985-09-12 EP EP85904653A patent/EP0193591B2/en not_active Expired - Lifetime
- 1985-09-12 JP JP60504103A patent/JPH0713496B2/en not_active Expired - Lifetime
- 1985-09-12 WO PCT/GB1985/000416 patent/WO1986001858A1/en active IP Right Grant
- 1985-09-12 US US06/860,318 patent/US4702151A/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB201142A (en) * | 1923-04-19 | 1924-09-19 | Hermann Francois Antoine Sprin | Pistons for explosion motors |
GB266343A (en) * | 1926-02-18 | 1927-08-18 | Weiss Johann | Improvements in and relating to pistons particularly pistons for internal combustionengines |
US2066613A (en) * | 1926-03-01 | 1937-01-05 | Ray E Day | Piston |
US1774396A (en) * | 1927-03-04 | 1930-08-26 | Noble Warren | Piston |
US1842910A (en) * | 1928-04-05 | 1932-01-26 | Lister William | Piston |
GB720172A (en) * | 1950-07-25 | 1954-12-15 | Nu Strut Flexible Piston Compa | Improvements in or relating to pistons |
FR2116093A5 (en) * | 1970-11-27 | 1972-07-07 | Daimler Benz Ag | |
EP0154405A1 (en) * | 1984-02-10 | 1985-09-11 | Ae Plc | Piston for reciprocating engine |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0312162A2 (en) * | 1987-10-13 | 1989-04-19 | T&N TECHNOLOGY LIMITED | Two-stroke internal combustion engine |
EP0312162A3 (en) * | 1987-10-13 | 1989-08-30 | T&N Technology Limited | Pistons |
EP0364810A2 (en) * | 1988-10-15 | 1990-04-25 | Wellworthy Limited | Pistons |
EP0364810A3 (en) * | 1988-10-15 | 1990-06-13 | Wellworthy Limited | Pistons |
DE19629399A1 (en) * | 1996-07-20 | 1998-01-22 | Mahle Gmbh | Ferrous metal or aluminium piston for internal combustion engine |
DE19629399B4 (en) * | 1996-07-20 | 2008-10-16 | Mahle Gmbh | Piston for internal combustion engines with a piston crown or piston top |
US8720405B2 (en) | 2008-10-13 | 2014-05-13 | Delaware Capital Formation, Inc. | Piston with improved side loading resistance |
US9273628B2 (en) | 2008-10-13 | 2016-03-01 | Performance Motorsports International, Inc. | Piston with improved side loading resistance |
Also Published As
Publication number | Publication date |
---|---|
GB8423050D0 (en) | 1984-10-17 |
JPH0713496B2 (en) | 1995-02-15 |
US4702151A (en) | 1987-10-27 |
EP0193591B2 (en) | 1994-11-09 |
GB2164419B (en) | 1988-04-07 |
KR950000916B1 (en) | 1995-02-03 |
EP0193591A1 (en) | 1986-09-10 |
KR860700280A (en) | 1986-08-01 |
GB2164419A (en) | 1986-03-19 |
JPS62500186A (en) | 1987-01-22 |
DE3567244D1 (en) | 1989-02-09 |
CA1252677A (en) | 1989-04-18 |
GB8522476D0 (en) | 1985-10-16 |
EP0193591B1 (en) | 1989-01-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4702151A (en) | Pistons | |
EP0364810B1 (en) | Pistons | |
CA1037802A (en) | Piston assembly | |
US6357341B1 (en) | Piston of internal combustion engine | |
GB2148451A (en) | Structure of internal-combustion engine piston | |
EP0238146B1 (en) | Pistons | |
US4674399A (en) | Pistons for internal combustion engines | |
US4751871A (en) | Multisectional piston with plural ceramic parts and rigidly connected piston rod for use in horizontally opposed piston internal combustion engine | |
KR900004612B1 (en) | Pistons | |
EP0188108B1 (en) | Pistons | |
US4669366A (en) | Aluminum plunger piston with thermal expansion regulating strip, for internal combustion engines | |
US4677900A (en) | Pistons for internal combustion engines | |
EP0251393B1 (en) | Pistons | |
GB2153964A (en) | Piston constructions for internal combustion engines | |
US5809946A (en) | Structure of an open deck type cylinder block | |
GB2162614A (en) | Bearing surfaces for internal combustion engine pistons | |
ES277023U (en) | Light metal pistons. | |
JPH0732928Y2 (en) | Piston for internal combustion engine | |
JPH02123259A (en) | Cylinder | |
JPH0148386B2 (en) | ||
WO1993006389A1 (en) | Piston for use in an engine or motor | |
GB2344401A (en) | Articulated piston |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): JP KR US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE FR GB IT LU NL SE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1985904653 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1985904653 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1985904653 Country of ref document: EP |