WO2005003527A2 - Brennkraftmaschine - Google Patents
Brennkraftmaschine Download PDFInfo
- Publication number
- WO2005003527A2 WO2005003527A2 PCT/AT2004/000220 AT2004000220W WO2005003527A2 WO 2005003527 A2 WO2005003527 A2 WO 2005003527A2 AT 2004000220 W AT2004000220 W AT 2004000220W WO 2005003527 A2 WO2005003527 A2 WO 2005003527A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piston
- combustion engine
- internal combustion
- particular according
- cylinder
- 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
- F02F3/16—Pistons having cooling means
- F02F3/20—Pistons having cooling means the means being a fluid flowing through or along piston
- F02F3/22—Pistons having cooling means the means being a fluid flowing through or along piston the fluid being liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/04—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/18—Other cylinders
- F02F1/22—Other cylinders characterised by having ports in cylinder wall for scavenging or charging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/02—Arrangements of lubricant conduits
- F01M2011/025—Arrangements of lubricant conduits for lubricating gudgeon pins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/02—Arrangements of lubricant conduits
- F01M2011/027—Arrangements of lubricant conduits for lubricating connecting rod bearings
Definitions
- the invention relates to an internal combustion engine with at least one piston reciprocating in a cylinder with a piston ring region with at least one piston ring, the piston having at least one first cavity for receiving at least one compression ring passing gases, the piston ring region of the piston via at least a first one Channel is connected to the first cavity, and wherein the gases can be removed from the first cavity via at least one second channel.
- Counter-piston engines with two pistons oscillating in opposite directions in a cylinder are well known, for example from DE 27 04 006 AI or DE 1 942 007 A.
- Counter-piston engines have the advantage of good mass balance. Since the combustion chamber is formed between the two piston crowns, a cylinder head acting as a cooling surface can be dispensed with, as a result of which very good thermal efficiency can be achieved. Wall deposits, particularly in the piston top land area, adversely affect the combustion process and the consumption of lubricating oil.
- the object of the invention is to avoid these disadvantages and to achieve a separation of the blow-by gases passing through the piston rings from the oil mist in an internal combustion engine in the simplest and most effective manner possible.
- Another task is to reduce deposits and the consumption of lubricating oil.
- the second flow path in the region of the wall of the piston preferably in the region of the piston skirt, ends in an outlet opening, the outlet opening communicating in at least one piston position with an inlet opening in the cylinder wall, preferably leading to a collecting duct in the cylinder housing.
- the first cavity can be designed as an annular space adjoining the piston ring area radially inwards.
- the first and / or second flow path can be designed as a channel formed in the piston.
- the blow-by gases flow through the first flow path starting from the piston ring area in the area of a compression ring into the first cavity and are guided to an outlet opening in the area of the piston skirt via a second channel arranged obliquely essentially in the direction of the crank chamber.
- the outlet opening communicates with a corresponding inlet opening in the cylinder wall of the cylinder housing, as a result of which the gases enclosed in the first cavity can flow into the collecting duct.
- An oil separation system is directly connected to the collecting duct, where the oil is largely separated from the blow-by gas mist.
- the lubricating oil is fed back into the crankcase.
- a check valve opening in the direction of the collecting duct is arranged in the region of the inlet opening.
- the first cavity is flow-connected via at least one connecting channel to a second cavity formed by a hollow piston pin.
- the hollow piston pin serves as an additional volume for receiving the blow-by gases, as a result of which relatively large blow-by gas volumes can be collected within the piston. This has a particularly advantageous effect on the separation of the blow-by gases from the crankcase.
- the second flow path is formed by the hollow piston pin, the outlet opening preferably being formed by an open end face of the piston pin.
- an essentially cylindrical fire ring is arranged in the cylinder in an area assigned to the top dead center position of the pistons.
- the inner diameter of the fire ring is advantageously smaller than the diameter of the cylinder.
- the width of the fire ring is dimensioned so that the top land of the pistons plunge into the fire ring at top dead center, as a result of which deposits are removed or avoided.
- the fire ring is inserted into an annular recess in the cylinder jacket.
- the fire ring is slotted. Marking of the slot on the piston by passing the fire ring through the piston can be avoided if the slot is inclined, i.e. inclined to the cylinder axis.
- the fire ring is preferably arranged in a non-rotatable manner in the cylinder and is preferably held by an anti-rotation device.
- the anti-rotation device of the fire ring is formed by a screw or a pin which preferably engages in the slot and is inserted into the cylinder. It is particularly advantageous if the twisting shear is inserted into the slot and the diameter of the screw completely fills the width of the slot. In this way, a twisting of the fire ring and an unintentional falling out can be prevented.
- the fire ring has at least one passage opening for a component opening into the combustion chamber, the component preferably being an injection nozzle, a prechamber nozzle or a spark plug. Injection nozzles, prechamber nozzles and / or spark plugs can thus protrude through the fire ring into the combustion chamber defined by the fire ring.
- FIG. 1 shows a piston of an internal combustion engine according to the invention in a longitudinal section to the piston pin according to line II in an embodiment variant in FIG. 2, 2 shows the piston in a section transverse to the piston pin according to the line II-II in FIG. 1,
- Fig. 3 shows the piston in a further embodiment
- Fig. 4 shows a cylinder of the internal combustion engine according to an embodiment of the invention in longitudinal section.
- a piston 1 is mounted to and fro in a cylinder 2 and is connected via a piston pin 3 to a connecting rod (not shown) for power transmission to a crankshaft.
- the piston 1 has a piston ring region 5 adjoining the piston crown 4 with grooves 6, 7 and 8 for piston rings, specifically for compression rings 9, 10 and an oil scraper ring 11.
- a first flow path 12 formed by a channel leads to a first cavity 13, which is designed as an annular space 14 radially adjoining the piston ring region 5.
- the annular space 14 is connected to an outlet opening 16 in the piston skirt 17 via at least one second flow path 15, which is designed as a channel and runs obliquely in the direction of the crank chamber (FIG. 2).
- a collecting duct 19 is formed in the cylinder housing 18 and extends from an inlet opening 17 in the cylinder wall 20.
- the inlet opening 17 communicates in a certain position of the piston 1, for example at bottom dead center, with the outlet opening 16 in the piston skirt 27.
- a check valve 21 opening in the direction of the collecting duct 19 is arranged, through which a Backflow of gases from the collecting channel 19 into the cylinder 2 is prevented.
- the collecting duct 19 is connected to a crankcase ventilation line (not shown further) or directly to an inlet flow path of the internal combustion engine.
- Blow-by gases which pass through the compression rings 9, 10 reach the first cavity 13 via the first channels 12 and are retained in this annular space 14 until the outlet opening 16 is at the same height as the inlet opening 17. If the inlet opening 17 corresponds to the outlet opening 16, the gases held in the annular space 14 can be guided via the check valve 21 into the collecting space 19 and further into an inlet flow path, not shown.
- a second cavity formed by the hollow piston pin 3 can be used as an additional volume, in which the annular space 14 is flow-connected to the second cavity 23 inside the piston pin 3 via at least one connecting channel 22.
- the piston- Bolt 3 is sealed gas-tight on the front side by cover 24 (FIG. 1). The blow-by gases are temporarily stored in the first and second cavities 13, 23.
- the piston pin 3 on at least one end face without a cover, as a result of which the piston pin 3 itself forms the outlet opening 16 of the second flow path 15.
- the second flow path 15 is formed through the interior of the piston pin 3.
- the inlet opening 17 is arranged in a region of the cylinder wall 2 in such a way that the outlet opening 16 communicates with the inlet opening 17 at least in a piston stroke position in order to allow the blow-by gases to flow into the collecting space (FIG. 3).
- the intermediate storage of the blow-by gases in the annular space 14 and the discharge of the blow-by gases via the second duct 15 into the collecting duct 19 result in a particularly good separation of the blow-by gases from the crank chamber.
- the intensity of the mixing of the oil pollutants contained in the blow-by gases with the lubricating oil can be greatly reduced, and the oil aging behavior can thus be significantly improved.
- Fig. 4 shows a cylinder of an internal combustion engine in longitudinal section.
- Two pistons 106, 108 oscillating in opposite directions synchronously are arranged in a cylinder 104 of a counter-piston internal combustion engine formed by a cylinder liner 102.
- the pistons 106, 108 are connected via a connecting rod (not shown) to a crank mechanism (not shown), the crank mechanisms being synchronized with one another.
- the figure shows the two pistons 106, 108 in the top dead center position, in which the pistons 106, 108 experience the greatest approximation.
- a fire ring 112 is arranged in the area of the intermediate space defining a combustion chamber 110 between the two pistons 106, 108, the fire ring 112 being inserted in an annular recess 114 in the cylinder liner 102, preferably formed by an undercut.
- the inner diameter d of the fire ring 112 is smaller than the diameter D of the cylinder 104.
- the fire ring 112 has a slot 118 which is inclined to the cylinder axis 116, as a result of which the diameter of the fire ring 112 can be reduced elastically slightly during assembly in order to enable insertion into the cylinder bushing 102 until the fire ring 112 engages in the recess 114.
- the anti-rotation device can be formed by a screw 120 which engages in the slot 118 and is connected to the cylinder sleeve 102, the diameter of which completely fills the width b of the slot 118. This prevents twisting of the fire ring 112 and inadvertently reducing the inside diameter of the fire ring 112 and thus preventing it from falling out of the cylinder liner 102.
- the fire ring can have at least one radial recess 122 for an injection nozzle, a prechamber nozzle or a spark plug.
- references used in the subclaims indicate the further development of the subject matter of the skin claim through the features of the respective subclaim; they are not to be understood as a waiver of the achievement of an independent, objective protection for the characteristics of the related subclaims.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/563,823 US7428889B2 (en) | 2003-07-08 | 2004-06-24 | Internal combustion engine |
DE112004001182T DE112004001182D2 (de) | 2003-07-08 | 2004-06-24 | Brennkraftmaschine |
US12/073,852 US7739993B2 (en) | 2003-07-08 | 2008-03-11 | Internal combustion engine |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT4852003 | 2003-07-08 | ||
ATGM485/2003 | 2003-07-08 | ||
AT9632004A AT414016B (de) | 2004-06-03 | 2004-06-03 | Brennkraftmaschine |
ATA963/2004 | 2004-06-03 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/563,823 A-371-Of-International US7428889B2 (en) | 2003-07-08 | 2004-06-24 | Internal combustion engine |
US12/073,852 Division US7739993B2 (en) | 2003-07-08 | 2008-03-11 | Internal combustion engine |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005003527A2 true WO2005003527A2 (de) | 2005-01-13 |
WO2005003527A3 WO2005003527A3 (de) | 2005-06-09 |
Family
ID=33565495
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AT2004/000220 WO2005003527A2 (de) | 2003-07-08 | 2004-06-24 | Brennkraftmaschine |
Country Status (3)
Country | Link |
---|---|
US (2) | US7428889B2 (de) |
DE (1) | DE112004001182D2 (de) |
WO (1) | WO2005003527A2 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160290277A1 (en) * | 2015-03-31 | 2016-10-06 | Achates Power, Inc. | Cylinder Liner For An Opposed-Piston Engine |
US10156202B2 (en) | 2016-03-04 | 2018-12-18 | Achates Power, Inc. | Barrier ring and assembly for a cylinder of an opposed-piston engine |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8251041B2 (en) * | 2010-03-11 | 2012-08-28 | West Virginia University | Accelerated compression ignition engine for HCCI |
US9512779B2 (en) * | 2010-04-27 | 2016-12-06 | Achates Power, Inc. | Swirl-conserving combustion chamber construction for opposed-piston engines |
EP2547868B1 (de) * | 2010-04-27 | 2016-08-03 | Achates Power, Inc. | Brennkammerkonstruktionen für motoren mit entgegengesetzten kolben |
US10180115B2 (en) * | 2010-04-27 | 2019-01-15 | Achates Power, Inc. | Piston crown bowls defining combustion chamber constructions in opposed-piston engines |
US9945323B1 (en) * | 2012-08-02 | 2018-04-17 | Tk Holdings Inc. | Linear actuator |
EP2746531B1 (de) * | 2012-12-21 | 2015-07-22 | Caterpillar Energy Solutions GmbH | Unverbrannte Kraftstoffentlüftung in Verbrennungsmotoren |
EP2746553B1 (de) * | 2012-12-21 | 2016-04-20 | Caterpillar Energy Solutions GmbH | Entlüftung für unverbrannten Kraftstoff in Verbrennungsmotoren |
US9771861B2 (en) | 2014-09-09 | 2017-09-26 | Avl Powertrain Engineering, Inc. | Opposed piston two-stroke engine with thermal barrier |
US20170356418A1 (en) * | 2016-06-08 | 2017-12-14 | Exoes | Piston Type Expander |
US9885281B2 (en) | 2016-06-13 | 2018-02-06 | Ford Global Technologies, Llc | Engine system with two pistons |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4111104A (en) * | 1977-03-30 | 1978-09-05 | General Motors Corporation | Engine with low friction piston |
US4191150A (en) * | 1978-03-20 | 1980-03-04 | General Motors Corporation | Engine with selective venting of unburned mixture from the piston crevice volume |
US4363310A (en) * | 1980-07-03 | 1982-12-14 | General Motors Corporation | Diesel engine with blowby scavenging |
US4811706A (en) * | 1988-02-22 | 1989-03-14 | General Electric Company | Pressurized balanced sealing system for use on the ring-liner interface of a coal fired diesel engine |
US5067453A (en) * | 1989-09-07 | 1991-11-26 | Sanshin Kogyo Kabushiki Kaisha | Piston of two-cycle engine |
US6378482B2 (en) * | 1998-12-29 | 2002-04-30 | Volvo Car Corporation | Piston |
US6431157B1 (en) * | 1999-06-07 | 2002-08-13 | Volvo Car Corporation | Internal combustion engine |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1895206A (en) * | 1930-09-29 | 1933-01-24 | Ricardo Harry Ralph | Swash plate internal combustion engine operating on the two-stroke cycle |
US2452238A (en) * | 1948-01-07 | 1948-10-26 | Hollingsworth Raphael | Insert for changing the compression ratio of internal-combustion engines |
US3489130A (en) * | 1968-01-10 | 1970-01-13 | Sealed Power Corp | Piston and cylinder construction |
US3476099A (en) * | 1968-02-26 | 1969-11-04 | Int Harvester Co | Head,gasket,and protector assembly and method |
US3667443A (en) * | 1970-03-02 | 1972-06-06 | Gen Motors Corp | Internal combustion engine with vented piston clearance spaces and method |
US4105008A (en) * | 1975-09-04 | 1978-08-08 | Cornell Research Foundation, Inc. | Anti-pollution piston construction |
DE2704006A1 (de) | 1977-02-01 | 1978-08-03 | Milan Kubicek | Gegenkolbenmotor |
JPH02215955A (ja) | 1989-02-14 | 1990-08-28 | Nissan Motor Co Ltd | 内燃機関のピストン装置 |
US5979298A (en) * | 1997-05-08 | 1999-11-09 | Zellner Pistons, Llc | Cooling gallery for pistons |
US6164260A (en) * | 1999-07-13 | 2000-12-26 | Caterpillar Inc. | Scraping ring and sealing ring used with a cylinder liner in an internal combustion engine |
US6619244B1 (en) * | 2001-08-13 | 2003-09-16 | Patrick C. Ho | Expansible chamber engine |
US7004120B2 (en) * | 2003-05-09 | 2006-02-28 | Warren James C | Opposed piston engine |
-
2004
- 2004-06-24 US US10/563,823 patent/US7428889B2/en not_active Expired - Fee Related
- 2004-06-24 DE DE112004001182T patent/DE112004001182D2/de not_active Ceased
- 2004-06-24 WO PCT/AT2004/000220 patent/WO2005003527A2/de active Application Filing
-
2008
- 2008-03-11 US US12/073,852 patent/US7739993B2/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4111104A (en) * | 1977-03-30 | 1978-09-05 | General Motors Corporation | Engine with low friction piston |
US4191150A (en) * | 1978-03-20 | 1980-03-04 | General Motors Corporation | Engine with selective venting of unburned mixture from the piston crevice volume |
US4363310A (en) * | 1980-07-03 | 1982-12-14 | General Motors Corporation | Diesel engine with blowby scavenging |
US4811706A (en) * | 1988-02-22 | 1989-03-14 | General Electric Company | Pressurized balanced sealing system for use on the ring-liner interface of a coal fired diesel engine |
US5067453A (en) * | 1989-09-07 | 1991-11-26 | Sanshin Kogyo Kabushiki Kaisha | Piston of two-cycle engine |
US6378482B2 (en) * | 1998-12-29 | 2002-04-30 | Volvo Car Corporation | Piston |
US6431157B1 (en) * | 1999-06-07 | 2002-08-13 | Volvo Car Corporation | Internal combustion engine |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160290277A1 (en) * | 2015-03-31 | 2016-10-06 | Achates Power, Inc. | Cylinder Liner For An Opposed-Piston Engine |
WO2016160340A1 (en) * | 2015-03-31 | 2016-10-06 | Achates Power, Inc. | Cylinder liner for an opposed-piston engine |
CN107429631A (zh) * | 2015-03-31 | 2017-12-01 | 阿凯提兹动力公司 | 用于对置活塞发动机的气缸衬套 |
US9845764B2 (en) | 2015-03-31 | 2017-12-19 | Achates Power, Inc. | Cylinder liner for an opposed-piston engine |
US10677188B2 (en) | 2015-03-31 | 2020-06-09 | Achates Power, Inc. | Cylinder liner for an opposed-piston engine |
US10156202B2 (en) | 2016-03-04 | 2018-12-18 | Achates Power, Inc. | Barrier ring and assembly for a cylinder of an opposed-piston engine |
Also Published As
Publication number | Publication date |
---|---|
US20080210204A1 (en) | 2008-09-04 |
DE112004001182D2 (de) | 2006-06-01 |
US20060150940A1 (en) | 2006-07-13 |
US7428889B2 (en) | 2008-09-30 |
WO2005003527A3 (de) | 2005-06-09 |
US7739993B2 (en) | 2010-06-22 |
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