EP3423693A1 - Cylinder liner and anti-polishing ring - Google Patents

Cylinder liner and anti-polishing ring

Info

Publication number
EP3423693A1
EP3423693A1 EP16713504.5A EP16713504A EP3423693A1 EP 3423693 A1 EP3423693 A1 EP 3423693A1 EP 16713504 A EP16713504 A EP 16713504A EP 3423693 A1 EP3423693 A1 EP 3423693A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
piston
cylinder liner
hole
engine
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
Application number
EP16713504.5A
Other languages
German (de)
French (fr)
Other versions
EP3423693B1 (en
Inventor
Anders ÖSTER
Tore HÄGGDAHL
Sven INGO
Tommy EMAUS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wartsila Finland Oy
Original Assignee
Wartsila Finland Oy
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wartsila Finland Oy filed Critical Wartsila Finland Oy
Publication of EP3423693A1 publication Critical patent/EP3423693A1/en
Application granted granted Critical
Publication of EP3423693B1 publication Critical patent/EP3423693B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/004—Cylinder liners
    • 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
    • F02B77/08—Safety, indicating, or supervising devices
    • F02B77/085—Safety, indicating, or supervising devices with sensors measuring combustion processes, e.g. knocking, pressure, ionization, combustion flame
    • 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 
    • F02F2001/006—Cylinders; Cylinder heads  having a ring at the inside of a liner or cylinder for preventing the deposit of carbon oil particles, e.g. oil scrapers

Definitions

  • the present invention relates to a cylinder liner in accordance with the preamble of claim 1 .
  • the invention also concerns an anti-polishing ring for a cylinder liner as defined in the preamble of the other independent claim.
  • Cylinder pressure can be measured either directly using a pressure sensor that is exposed to the pressure inside a cylinder, or indirectly using strain gages, force sensors or similar devices monitoring deformation or displacement of a component of the engine. If direct pressure measuring is used, the pressure sensors are typically arranged in the cylinder heads of the engine. A disadvantage of direct pres- sure monitoring is that the lifetime of the pressure sensors is limited due to the high temperatures and the vibrations occurring in the cylinder heads.
  • An object of the present invention is to provide an improved cylinder liner for forming a cylinder of a piston engine, which comprises a piston that is configured to move in the cylinder in a reciprocating manner between bottom dead center and top dead center, the piston comprising at least one piston ring.
  • the characterizing features of the cylinder liner according to the invention are given in the characterizing part of claim 1 .
  • Another object of the invention is to pro- vide an improved anti-polishing ring for a cylinder liner. The characterizing features of the anti-polishing ring are given in the characterizing part of the other independent claim.
  • the wall of the cylinder liner comprises a through hole, which is configured to allow transmission of pressure from the cylinder to a pressure sensor and arranged in the wall of the cylinder liner at such a height that when the cylinder liner is mounted in an engine for forming a cylinder and a piston inside the cylinder is at top dead center, the hole opens inside the cylinder at a location that is above all the piston rings of the piston.
  • cylinder pressure can be measured directly via the wall of the cylinder liner. Temperature and vibration levels in the cylinder liner are lower than in a cylinder head. The lifetime of pressure sensors is thus increased.
  • the hole is configured to receive a pressure sensor.
  • the diameter of the hole can increase in steps towards the outer surface of the cylinder liner.
  • the upper end of the cylinder liner comprises a recess for receiving an anti-polishing ring.
  • the hole of the cylinder liner opens to the area of the recess. This allows a pressure sensor to be arranged behind an anti-polishing ring, which protects the pressure sensor from heat.
  • the outer surface of the anti-polishing ring comprises a groove, which extends in the axial direction from the upper end of the anti-polishing ring towards the lower end and is configured to allow transmission of pressure from the cylinder to the through hole of the cylinder liner.
  • a piston engine comprises at least one cylinder and a piston that is configured to move in the cylinder in a reciprocating manner between bottom dead center and top dead center, the piston comprising at least one piston ring.
  • the cylinder is formed by a cylinder liner defined above.
  • the engine comprises a cylinder liner having at the upper end a recess for accommodating an anti-polishing ring and an anti-polishing ring defined above.
  • Fig. 1 shows schematically a cylinder pressure monitoring arrangement of a piston engine
  • Fig. 2 shows a cylinder liner of a piston engine according to an embodiment of the invention
  • Fig. 3 shows a cylinder liner of a piston engine according to another embodiment of the invention.
  • FIG 1 is shown schematically an internal combustion engine 1 with a cylinder pressure monitoring arrangement.
  • the engine 1 is a large piston engine, such as a main or an auxiliary engine of a ship or an engine that is used at a power plant for producing electricity.
  • the cylinder bore of the engine 1 is at least 150 mm.
  • four cylinders 2 are shown.
  • the engine 1 can comprise any reasonable number of cylinders 2, which can be arranged in line or in a V-configuration.
  • each cylinder of the engine 1 is provided with a pressure sensor 3.
  • the pressure sensors 3 are arranged to measure the cylinder pressures directly. Each pressure sensor 3 is thus exposed to the cylinder pressure in the respective cylinder 2.
  • Each pressure sensor 3 is connected to a control unit 4.
  • Figure 2 shows a simplified cross-sectional view of a cylinder liner 5 according to an embodiment of the invention.
  • the cylinder liner 5 is arranged at least partly inside an engine block and forms one of the cylinders 2 of the engine 1 .
  • a piston 6 is arranged inside the cylinder 2.
  • the piston 6 is connected via a connecting rod 8 to a crankshaft (not shown).
  • the piston 6 is configured to move in a reciprocating manner between bottom dead center and top dead center.
  • a cylinder head 7 closes the upper end of the cylinder 2.
  • the expres- sion "upper end” refers here to the end that is farther from the crankshaft, i.e. the top dead center end of the cylinder 2.
  • the cylinder 2 does not need to be arranged in a vertical position.
  • the piston 6 is shown at top dead center.
  • the piston 6 is provided with piston rings 10.
  • the piston 6 comprises three piston rings 10.
  • the main functions of the piston rings 10 are sealing of the combustion chamber for preventing escaping of combustion gases, heat transfer from the piston 6 to the cylinder liner 5 and regulation of the oil film on the inner surface of the cylinder liner 5.
  • the outer diameter of the piston 6 above the piston rings 10 is smaller than the inner diameter of the cylinder liner 5. In a gap 14 between the piston 6 and the cylinder liner 5 above the piston rings 10, the pressure is thus substantially the same as above the piston 6.
  • the wall of the cylinder liner 5 is provided with a through hole 9.
  • the hole 9 is arranged at such a height that when the cylinder liner 5 is arranged in the engine 1 for forming the cylinder 2 and the piston 6 is at top dead center, the hole 9 opens onto the inner surface of the cylinder liner 5 at a location, which is above all the piston rings 10 of the piston 6. The cylinder pressure is thus transmitted to the hole 9 regardless of the position of the piston 6.
  • the diameter of the hole 9 increases in steps towards the outer surface of the cylinder liner 5.
  • the innermost end of the hole has thus a smaller diameter than the outermost end of the hole 9.
  • the outer- most end of the hole 9 can be configured to receive a pressure sensor 3.
  • the innermost end of the hole 9 can function as a conduit transmitting pressure from the cylinder 2 to the pressure sensor 3.
  • the hole 9 can be provided with a thread for attaching the pressure sensor 3 to the cylinder liner 5.
  • Figure 3 shows another embodiment of the invention.
  • the cylinder liner 5 of figure 2 differs from the cylinder liner 5 of figure 2 in that it is provided with a recess 13 for receiving an anti-polishing ring 1 1 .
  • the recess 13 is located at the upper end of the cylinder liner 13.
  • the anti-polishing ring 1 1 is a sleeve-like element, which is used for removing carbon deposits from a piston 6.
  • the inner diameter of the anti-polishing ring 1 1 is smaller than the inner diameter of the cylinder liner 5, but larger than the outer diameter of the piston 6 in the area above the piston rings 10.
  • the lower end of the anti-polishing ring 1 1 is at such a height that when the piston 6 is at top dead center, the lower end of the anti- polishing ring 1 1 is above all the piston rings 10 of the piston 6, but the upper end of the piston 6 is above the lower end of the anti-polishing ring 1 1 .
  • the anti-polishing ring 1 1 can thus scrape carbon deposits from a piston crown above the piston rings 10.
  • the hole 9 of the cylinder liner 5 is arranged at the area of the recess 13. The hole 9 is thus behind the anti-polishing ring 1 1 .
  • the anti- polishing ring 1 1 is provided with a groove 12.
  • the groove 12 is arranged on the outer surface of the anti-polishing ring 1 1 .
  • the groove 12 extends from the upper end of the anti-polishing ring 1 1 to such a location that fluid communica- tion is established between the cylinder 2 and the hole 9 of the cylinder liner 5. In the embodiment of figure 3, the groove 12 is vertical.
  • the anti-polishing ring 1 1 is not in contact with the cylinder head 7, but a small gap 15 is formed between the cylinder head 7 and the anti-polishing ring 1 1 . Cylinder pressure can thus be transmitted through the gap to the groove 12. By locating the hole 9 of the cylinder liner 5 behind the anti-polishing ring 1 1 , pressure can be transmitted to a pressure sensor 3 but the pressure sensor 3 is protected from the most extreme heat.
  • the anti-polishing ring 1 1 can be provided with a locking pin and the cylinder liner 5 or the cylinder head 7 with a cooperating recess for keeping the groove 12 of the anti-polishing ring 1 1 aligned with the hole 9 of the cylinder liner 5.

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)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

The cylinder liner (5) for forming a cylinder (2) of a piston engine (1) comprises a through hole (9), which is configured to allow transmission of pressure from the cylinder (2) to a pressure sensor (3) and arranged in the wall of the cylinder liner (5) at such a height that when the cylinder liner (5) is mounted in an engine (1) for forming a cylinder (2) and a piston (6) inside the cylinder (2) is at top dead center, the hole (9) opens inside the cylinder (2) at a location that is above all the piston rings (10) of the piston (6).

Description

Cylinder liner and anti-polishing ring Technical field of the invention
The present invention relates to a cylinder liner in accordance with the preamble of claim 1 . The invention also concerns an anti-polishing ring for a cylinder liner as defined in the preamble of the other independent claim.
Background of the invention
Large internal combustion engines, such as ship and power plant engines, are often provided with means for monitoring cylinder pressures. Cylinder pressure can be measured either directly using a pressure sensor that is exposed to the pressure inside a cylinder, or indirectly using strain gages, force sensors or similar devices monitoring deformation or displacement of a component of the engine. If direct pressure measuring is used, the pressure sensors are typically arranged in the cylinder heads of the engine. A disadvantage of direct pres- sure monitoring is that the lifetime of the pressure sensors is limited due to the high temperatures and the vibrations occurring in the cylinder heads.
Summary of the invention
An object of the present invention is to provide an improved cylinder liner for forming a cylinder of a piston engine, which comprises a piston that is configured to move in the cylinder in a reciprocating manner between bottom dead center and top dead center, the piston comprising at least one piston ring. The characterizing features of the cylinder liner according to the invention are given in the characterizing part of claim 1 . Another object of the invention is to pro- vide an improved anti-polishing ring for a cylinder liner. The characterizing features of the anti-polishing ring are given in the characterizing part of the other independent claim.
The wall of the cylinder liner according to the invention comprises a through hole, which is configured to allow transmission of pressure from the cylinder to a pressure sensor and arranged in the wall of the cylinder liner at such a height that when the cylinder liner is mounted in an engine for forming a cylinder and a piston inside the cylinder is at top dead center, the hole opens inside the cylinder at a location that is above all the piston rings of the piston.
With the cylinder liner according to the invention, cylinder pressure can be measured directly via the wall of the cylinder liner. Temperature and vibration levels in the cylinder liner are lower than in a cylinder head. The lifetime of pressure sensors is thus increased.
According to an embodiment of the invention, the hole is configured to receive a pressure sensor. The diameter of the hole can increase in steps towards the outer surface of the cylinder liner.
According to an embodiment of the invention, the upper end of the cylinder liner comprises a recess for receiving an anti-polishing ring.
According to an embodiment of the invention, the hole of the cylinder liner opens to the area of the recess. This allows a pressure sensor to be arranged behind an anti-polishing ring, which protects the pressure sensor from heat.
In an anti-polishing ring according to the invention, the outer surface of the anti-polishing ring comprises a groove, which extends in the axial direction from the upper end of the anti-polishing ring towards the lower end and is configured to allow transmission of pressure from the cylinder to the through hole of the cylinder liner.
A piston engine according to the invention comprises at least one cylinder and a piston that is configured to move in the cylinder in a reciprocating manner between bottom dead center and top dead center, the piston comprising at least one piston ring. The cylinder is formed by a cylinder liner defined above. According to an embodiment of the invention, the engine comprises a cylinder liner having at the upper end a recess for accommodating an anti-polishing ring and an anti-polishing ring defined above. Brief description of the drawings
Embodiments of the invention are described below in more detail with reference to the accompanying drawings, in which
Fig. 1 shows schematically a cylinder pressure monitoring arrangement of a piston engine,
Fig. 2 shows a cylinder liner of a piston engine according to an embodiment of the invention, and
Fig. 3 shows a cylinder liner of a piston engine according to another embodiment of the invention.
Description of embodiments of the invention
In figure 1 is shown schematically an internal combustion engine 1 with a cylinder pressure monitoring arrangement. The engine 1 is a large piston engine, such as a main or an auxiliary engine of a ship or an engine that is used at a power plant for producing electricity. The cylinder bore of the engine 1 is at least 150 mm. In figure 1 , four cylinders 2 are shown. However, the engine 1 can comprise any reasonable number of cylinders 2, which can be arranged in line or in a V-configuration. For monitoring pressures in the cylinders 2, each cylinder of the engine 1 is provided with a pressure sensor 3. The pressure sensors 3 are arranged to measure the cylinder pressures directly. Each pressure sensor 3 is thus exposed to the cylinder pressure in the respective cylinder 2. Each pressure sensor 3 is connected to a control unit 4.
Figure 2 shows a simplified cross-sectional view of a cylinder liner 5 according to an embodiment of the invention. The cylinder liner 5 is arranged at least partly inside an engine block and forms one of the cylinders 2 of the engine 1 . A piston 6 is arranged inside the cylinder 2. The piston 6 is connected via a connecting rod 8 to a crankshaft (not shown). The piston 6 is configured to move in a reciprocating manner between bottom dead center and top dead center. A cylinder head 7 closes the upper end of the cylinder 2. The expres- sion "upper end" refers here to the end that is farther from the crankshaft, i.e. the top dead center end of the cylinder 2. The cylinder 2 does not need to be arranged in a vertical position. In figure 2, the piston 6 is shown at top dead center. The piston 6 is provided with piston rings 10. In the example of figure 2, the piston 6 comprises three piston rings 10. However, the number of piston rings 10 could also be different. The main functions of the piston rings 10 are sealing of the combustion chamber for preventing escaping of combustion gases, heat transfer from the piston 6 to the cylinder liner 5 and regulation of the oil film on the inner surface of the cylinder liner 5. The outer diameter of the piston 6 above the piston rings 10 is smaller than the inner diameter of the cylinder liner 5. In a gap 14 between the piston 6 and the cylinder liner 5 above the piston rings 10, the pressure is thus substantially the same as above the piston 6.
For monitoring pressure inside the cylinder 2, the wall of the cylinder liner 5 is provided with a through hole 9. The hole 9 is arranged at such a height that when the cylinder liner 5 is arranged in the engine 1 for forming the cylinder 2 and the piston 6 is at top dead center, the hole 9 opens onto the inner surface of the cylinder liner 5 at a location, which is above all the piston rings 10 of the piston 6. The cylinder pressure is thus transmitted to the hole 9 regardless of the position of the piston 6. The diameter of the hole 9 increases in steps towards the outer surface of the cylinder liner 5. The innermost end of the hole has thus a smaller diameter than the outermost end of the hole 9. The outer- most end of the hole 9 can be configured to receive a pressure sensor 3. The innermost end of the hole 9 can function as a conduit transmitting pressure from the cylinder 2 to the pressure sensor 3. The hole 9 can be provided with a thread for attaching the pressure sensor 3 to the cylinder liner 5. By arranging the pressure sensor 3 in the cylinder liner 5, the pressure sensor 3 is not sub- jected to as high temperatures and vibration levels as a pressure sensor that is arranged in a cylinder head 7.
Figure 3 shows another embodiment of the invention. The cylinder liner 5 of figure 2 differs from the cylinder liner 5 of figure 2 in that it is provided with a recess 13 for receiving an anti-polishing ring 1 1 . The recess 13 is located at the upper end of the cylinder liner 13. The anti-polishing ring 1 1 is a sleeve-like element, which is used for removing carbon deposits from a piston 6. The inner diameter of the anti-polishing ring 1 1 is smaller than the inner diameter of the cylinder liner 5, but larger than the outer diameter of the piston 6 in the area above the piston rings 10. The lower end of the anti-polishing ring 1 1 is at such a height that when the piston 6 is at top dead center, the lower end of the anti- polishing ring 1 1 is above all the piston rings 10 of the piston 6, but the upper end of the piston 6 is above the lower end of the anti-polishing ring 1 1 . The anti-polishing ring 1 1 can thus scrape carbon deposits from a piston crown above the piston rings 10.
The hole 9 of the cylinder liner 5 is arranged at the area of the recess 13. The hole 9 is thus behind the anti-polishing ring 1 1 . For allowing transmission of pressure from the cylinder 2 to the hole 9 of the cylinder liner 5, the anti- polishing ring 1 1 is provided with a groove 12. The groove 12 is arranged on the outer surface of the anti-polishing ring 1 1 . The groove 12 extends from the upper end of the anti-polishing ring 1 1 to such a location that fluid communica- tion is established between the cylinder 2 and the hole 9 of the cylinder liner 5. In the embodiment of figure 3, the groove 12 is vertical. The anti-polishing ring 1 1 is not in contact with the cylinder head 7, but a small gap 15 is formed between the cylinder head 7 and the anti-polishing ring 1 1 . Cylinder pressure can thus be transmitted through the gap to the groove 12. By locating the hole 9 of the cylinder liner 5 behind the anti-polishing ring 1 1 , pressure can be transmitted to a pressure sensor 3 but the pressure sensor 3 is protected from the most extreme heat. The anti-polishing ring 1 1 can be provided with a locking pin and the cylinder liner 5 or the cylinder head 7 with a cooperating recess for keeping the groove 12 of the anti-polishing ring 1 1 aligned with the hole 9 of the cylinder liner 5.
It will be appreciated by a person skilled in the art that the invention is not limited to the embodiments described above, but may vary within the scope of the appended claims.

Claims

Claims
1 . A cylinder liner (5) for forming a cylinder (2) of a piston engine (1 ), which engine (1 ) comprises a piston (6) that is configured to move in the cylinder (2) in a reciprocating manner between bottom dead center and top dead center, the piston (6) comprising at least one piston ring (10), characterized in that the wall of the cylinder liner (5) comprises a through hole (9), which is configured to allow transmission of pressure from the cylinder (2) to a pressure sensor (3) and arranged in the wall of the cylinder liner (5) at such a height that when the cylinder liner (5) is mounted in an engine (1 ) for forming a cylinder (2) and a piston (6) inside the cylinder (2) is at top dead center, the hole (9) opens inside the cylinder (2) at a location that is above all the piston rings (10) of the piston (6).
2. A cylinder liner (5) according to claim 1 , wherein the hole (9) is configured to receive a pressure sensor (3).
3. A cylinder liner (5) according to claim 1 or 2, wherein the diameter of the hole (9) increases in steps towards the outer surface of the cylinder liner (5).
4. A cylinder liner (5) according to any of claims 1 to 3, wherein the upper end of the cylinder liner (5) comprises a recess (13) for receiving an anti- polishing ring (1 1 ).
5. A cylinder liner (5) according to claim 4, wherein the hole (9) opens to the area of the recess (13).
6. An anti-polishing ring (1 1 ) for a cylinder liner (5) according to claim 5, characterized in that the outer surface of the anti-polishing ring (1 1 ) comprises a groove (12), which extends in the axial direction from the upper end of the anti-polishing ring (1 1 ) towards the lower end and is configured to allow transmission of pressure from the cylinder (2) to the through hole (9) of the cylinder liner (5).
7. A piston engine (1 ) comprising at least one cylinder (2) and a piston (6) that is configured to move in the cylinder (2) in a reciprocating manner be- tween bottom dead center and top dead center, the piston (6) comprising at least one piston ring (10), characterized in that the cylinder (2) is formed by a cylinder liner (5) according to any of claims 1 to 5.
8. A piston engine (1) according to claim 7, wherein the engine (1) comprises a cylinder liner (5) according to claim 5 and an anti-polishing ring (11) according to claim 6.
EP16713504.5A 2016-03-04 2016-03-04 Cylinder liner and anti-polishing ring Active EP3423693B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2016/050132 WO2017149190A1 (en) 2016-03-04 2016-03-04 Cylinder liner and anti-polishing ring

Publications (2)

Publication Number Publication Date
EP3423693A1 true EP3423693A1 (en) 2019-01-09
EP3423693B1 EP3423693B1 (en) 2021-02-17

Family

ID=55646628

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16713504.5A Active EP3423693B1 (en) 2016-03-04 2016-03-04 Cylinder liner and anti-polishing ring

Country Status (4)

Country Link
EP (1) EP3423693B1 (en)
KR (1) KR102084346B1 (en)
CN (1) CN108699967B (en)
WO (1) WO2017149190A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6868584B2 (en) * 2018-03-16 2021-05-12 株式会社Ｉｈｉ原動機 engine
US11280291B2 (en) 2019-12-31 2022-03-22 Mahle International Gmbh Cylinder liner with temperature sensor

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Publication number Priority date Publication date Assignee Title
BE905141A (en) * 1985-07-19 1986-11-17 Orbital Eng Pty IMPROVEMENTS RELATING TO DIRECT INJECTION ENGINES.
US5156123A (en) * 1989-09-30 1992-10-20 Isuzu Motors Limited Engine with variable combustion chamber
JPH0526095A (en) * 1991-07-22 1993-02-02 Matsushita Electric Ind Co Ltd Misfire inspecting device
FI95830C (en) * 1994-05-27 1996-03-25 Waertsilae Diesel Int antipolishingring
DE10207123A1 (en) * 2002-02-20 2003-08-28 Delphi Tech Inc Ignition process for fuel mixtures in a combustion engine, injects fuel into center of cylinder and nebulizes it under high pressure
US7360511B2 (en) * 2004-06-10 2008-04-22 Achates Power, Inc. Opposed piston engine
DE102006060330A1 (en) * 2006-12-20 2008-06-26 Mahle International Gmbh Insert for a cylinder liner or a cylinder of an internal combustion engine
CN102434278B (en) * 2011-07-26 2013-07-03 郑安庆 Three-stroke reciprocating piston type engine
EP2602453A1 (en) * 2011-12-07 2013-06-12 Wärtsilä Schweiz AG Piston and cylinder assembly for a reciprocating compressor combustion machine and method for removing deposits from a piston
CN203809137U (en) * 2014-03-25 2014-09-03 扬州华铁铁路配件有限公司 Cylinder sleeve with carbon-proof protection sleeve and for engine

Also Published As

Publication number Publication date
CN108699967A (en) 2018-10-23
CN108699967B (en) 2023-04-25
EP3423693B1 (en) 2021-02-17
WO2017149190A1 (en) 2017-09-08
KR102084346B1 (en) 2020-03-03
KR20180118200A (en) 2018-10-30

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