EP3807514A1 - Gegossener kolben für einen verbrennungsmotor, aus einem material auf eisenbasis - Google Patents
Gegossener kolben für einen verbrennungsmotor, aus einem material auf eisenbasisInfo
- Publication number
- EP3807514A1 EP3807514A1 EP19729519.9A EP19729519A EP3807514A1 EP 3807514 A1 EP3807514 A1 EP 3807514A1 EP 19729519 A EP19729519 A EP 19729519A EP 3807514 A1 EP3807514 A1 EP 3807514A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- window
- iron
- piston according
- internal combustion
- 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.)
- Pending
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
- F02F3/0084—Pistons the pistons being constructed from specific materials
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
- B22D15/02—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor of cylinders, pistons, bearing shells or like thin-walled objects
-
- 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
- F02F3/00—Pistons
- F02F2003/0007—Monolithic pistons; One piece constructions; Casting of pistons
-
- 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
- F05C2201/0436—Iron
- F05C2201/0439—Cast iron
- F05C2201/0442—Spheroidal graphite cast iron, e.g. nodular iron, ductile iron
-
- 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
Definitions
- the invention relates to a cast piston for an internal combustion engine, made of an iron-based material.
- Pistons of internal combustion engines generally have the requirements that they are designed with the lowest possible weight and at the same time withstand the loads during operation.
- Pistons made of steel in particular are usually forged in one or two parts.
- Light alloy pistons made of aluminum alloys are usually cast.
- the invention has for its object a piston for an internal combustion engine
- the stem walls are the sections of the cylinder surface with which the piston is in sliding contact with one another during operation
- Cylinder liner is. Regarding the piston pin hub, it should be mentioned that it is preferably closed, in other words with no interruptions except for a lifting groove. It should also be emphasized that the piston according to the invention is preferably cast in one piece, preferably has a cooling channel, and is preferably used as a diesel piston.
- the impulse transmitted to the cylinder bore is reduced so that noise emissions are reduced.
- the necessary strength can still be ensured by FE analysis.
- the shaft wall is cut concavely, so that a concave structure remains on the shaft wall.
- Circumferential direction due to the window (s) at their narrowest point, compared to the widest point is reduced by at least 40%.
- at least one of the existing windows, preferably all windows are formed predominantly in that half of the side wall along the piston stroke axis that is closer to the piston head, which delimits the combustion chamber.
- the window can have an extension of at least 40%, preferably at least 60% of the shaft or side wall height at its "highest” point and / or begin immediately at the upper end thereof.
- spheroidal graphite cast iron in other words nodular cast iron, is currently preferred.
- This material advantageously has a low specific weight, which is in particular lower than that of forged steels.
- cast steel may be preferred as the material, which has a higher density, but in return a higher strength. This can
- the material of the piston according to the invention that it has a lower thermal conductivity than steel, so that the heating process of the
- Fig. 1 is a side view of the piston according to the invention in
- Fig. 2 is a side view of the piston of Fig. 1 from a
- the piston 10 according to the invention has an annular field 12 on the one hand and the other
- both side walls 16 which are connected by side walls 16 which carry the piston pin bosses 22.
- both side walls 16 that is to say also that side wall which faces away from the viewer according to FIG. 1, are two
- Piston pin hub 22 are formed in the upper region of the side wall 16. On its upper side, the windows 18, 20 directly adjoin the lower groove cheek of the lowest
- Ring groove on, and their boundary extends essentially in a plane perpendicular to the piston stroke axis.
- the boundaries of the windows 18, 20 each rise obliquely in the direction of the piston pin axis, and the lateral boundary on the side of the piston pin hub 22 extends (as shown in FIG. 1) from the bottom upward to the outside.
- H On the other hand, H.
- the smaller window 18 On the side of the stem wall 14, the smaller window 18 has an essentially extending in the direction of the piston stroke axis
- the window 20 is clearly asymmetrical to the window 18 and is sufficient
- Piston stroke axis, and the lower edges of the side walls 16 are rounded at least slightly concave, this concave rounding being more extensive on the pressure side in the example shown, that is to say provided with a smaller radius of curvature than on the counter pressure side.
- Piston according to the invention should also be mentioned that it is a
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (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 |
---|---|---|---|
DE102018209455.1A DE102018209455A1 (de) | 2018-06-13 | 2018-06-13 | Gegossener Kolben für einen Verbrennungsmotor, aus einem Material auf Eisenbasis |
PCT/EP2019/064820 WO2019238528A1 (de) | 2018-06-13 | 2019-06-06 | Gegossener kolben für einen verbrennungsmotor, aus einem material auf eisenbasis |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3807514A1 true EP3807514A1 (de) | 2021-04-21 |
Family
ID=66810809
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19729519.9A Pending EP3807514A1 (de) | 2018-06-13 | 2019-06-06 | Gegossener kolben für einen verbrennungsmotor, aus einem material auf eisenbasis |
Country Status (5)
Country | Link |
---|---|
US (1) | US11686270B2 (de) |
EP (1) | EP3807514A1 (de) |
CN (1) | CN112204240A (de) |
DE (1) | DE102018209455A1 (de) |
WO (1) | WO2019238528A1 (de) |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1675174A (en) * | 1925-08-28 | 1928-06-26 | Stephen D Hartog | Piston |
US4195600A (en) * | 1976-04-15 | 1980-04-01 | Yamaha Hatsudoki Kabushiki Kaisha | Crankcase chamber compression type two cycle internal combustion engines |
DE3024891A1 (de) | 1980-07-01 | 1982-02-11 | Karl Schmidt Gmbh, 7107 Neckarsulm | Leichtmetall-regelkolben fuer brennkraftmaschinen |
EP0050257A1 (de) | 1980-10-17 | 1982-04-28 | Mahle Gmbh | Leichter Tauchkolben für Verbrennungsmotoren |
DE3437111A1 (de) * | 1984-10-10 | 1986-04-10 | Kolbenschmidt AG, 7107 Neckarsulm | Leichtmetallkolben |
DE3531801A1 (de) * | 1985-09-06 | 1987-03-19 | Kolbenschmidt Ag | Leichtmetallkolben |
JPH0310057U (de) * | 1989-06-20 | 1991-01-30 | ||
DE4122921C2 (de) * | 1990-07-18 | 1999-04-08 | Mahle Gmbh | Tauchkolben für Verbrennungsmotoren mit ballig ovaler Außenform des Kolbenschaftes |
JPH0618642U (ja) * | 1992-08-11 | 1994-03-11 | 株式会社ユニシアジェックス | ピストン |
JP2885133B2 (ja) | 1995-06-12 | 1999-04-19 | トヨタ自動車株式会社 | 内燃機関のピストン |
JPH09329056A (ja) * | 1996-06-11 | 1997-12-22 | Toyota Motor Corp | 内燃機関用ピストン |
US6973723B2 (en) * | 2003-01-08 | 2005-12-13 | International Engine Intellectual Property Company, Llc | Piston formed by powder metallurgical methods |
US7406941B2 (en) | 2004-07-21 | 2008-08-05 | Federal - Mogul World Wide, Inc. | One piece cast steel monobloc piston |
AT505592B1 (de) | 2007-07-06 | 2009-04-15 | Mahle Kinig Kommanditgesellsch | Kolben |
JP4861394B2 (ja) | 2008-12-05 | 2012-01-25 | 本田技研工業株式会社 | ピストン |
EP2462366B1 (de) * | 2009-08-06 | 2020-07-15 | Tenneco Inc. | Kolben von geringer wärmeleitfähigkeit und konstruktionsverfahren dafür |
KR102051163B1 (ko) * | 2012-02-20 | 2019-12-02 | 테네코 인코퍼레이티드 | 내연 엔진용 피스톤 어셈블리 |
JP5655115B1 (ja) * | 2013-06-28 | 2015-01-14 | 株式会社リケン | 球状黒鉛鋳鉄 |
DE102013215538B4 (de) | 2013-08-07 | 2015-02-19 | Federal-Mogul Nürnberg GmbH | Kolben für einen Verbrennungsmotor |
US9759156B2 (en) * | 2015-03-04 | 2017-09-12 | Mahle International Gmbh | Asymmetric piston |
JP6256453B2 (ja) | 2015-11-17 | 2018-01-10 | マツダ株式会社 | エンジンのピストン構造 |
-
2018
- 2018-06-13 DE DE102018209455.1A patent/DE102018209455A1/de not_active Ceased
-
2019
- 2019-06-06 WO PCT/EP2019/064820 patent/WO2019238528A1/de unknown
- 2019-06-06 CN CN201980029138.5A patent/CN112204240A/zh active Pending
- 2019-06-06 US US15/734,001 patent/US11686270B2/en active Active
- 2019-06-06 EP EP19729519.9A patent/EP3807514A1/de active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2019238528A1 (de) | 2019-12-19 |
CN112204240A (zh) | 2021-01-08 |
DE102018209455A1 (de) | 2019-12-19 |
US20210215118A1 (en) | 2021-07-15 |
US11686270B2 (en) | 2023-06-27 |
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