EP3037639A2 - Système de cylindre pour un moteur à combustion à piston élévateur rincé en longueur, ainsi qu'élément d'étranglement pour un revêtement de cylindre - Google Patents

Système de cylindre pour un moteur à combustion à piston élévateur rincé en longueur, ainsi qu'élément d'étranglement pour un revêtement de cylindre Download PDF

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Publication number
EP3037639A2
EP3037639A2 EP15195158.9A EP15195158A EP3037639A2 EP 3037639 A2 EP3037639 A2 EP 3037639A2 EP 15195158 A EP15195158 A EP 15195158A EP 3037639 A2 EP3037639 A2 EP 3037639A2
Authority
EP
European Patent Office
Prior art keywords
cylinder liner
scavenging air
throttle element
cylinder
air inlet
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.)
Withdrawn
Application number
EP15195158.9A
Other languages
German (de)
English (en)
Other versions
EP3037639A3 (fr
Inventor
Fritz Bärtschi
Jiri Vyskocil
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.)
Winterthur Gas and Diesel AG
Original Assignee
Winterthur Gas and Diesel AG
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 Winterthur Gas and Diesel AG filed Critical Winterthur Gas and Diesel AG
Priority to EP15195158.9A priority Critical patent/EP3037639A3/fr
Publication of EP3037639A2 publication Critical patent/EP3037639A2/fr
Publication of EP3037639A3 publication Critical patent/EP3037639A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
    • F02B25/02—Engines characterised by using fresh charge for scavenging cylinders using unidirectional scavenging
    • F02B25/04—Engines having ports both in cylinder head and in cylinder wall near bottom of piston stroke
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two

Definitions

  • the invention relates to a cylinder arrangement for a longitudinally purged reciprocating internal combustion engine, in particular for a slow-running longitudinally purged two-stroke large diesel engine and a throttle element for a cylinder liner of a cylinder assembly according to the preamble of the independent claims 1 and 15.
  • the fresh air often referred to as scavenging air introduced at the bottom of the cylinder via scavenging air usually in the form of scavenging slots in the combustion chamber of the cylinder, while the piston is in the vicinity of located bottom dead center and the way for the Fresh air into the combustion chamber of the cylinder releases. That is, the fresh air is injected in practice, for example, from a turbocharger in the cylinder under a predetermined pressure.
  • a turbocharger in the cylinder under a predetermined pressure.
  • the amount of purging air that is supplied via the purging slots into the combustion chamber of the cylinder liner of the reciprocating internal combustion engine for example, crucial for many different processes or operating parameters of the internal combustion engine, such as for the performance of the engine, the fuel consumption, the combustion temperature , the combustion pressure, the chemical composition of the exhaust gases, so in particular the composition and amount of particularly harmful proportions in the exhaust gases, such as the proportion of different nitrogen oxides, and many other operating parameters, which is known in the art per se.
  • the object of the invention is therefore to provide a novel cylinder arrangement for a longitudinally-flushed reciprocating internal combustion engine, in particular for a slow-running two-stroke large diesel engine with which the problems known from the prior art are solved and with which it is particularly possible, one and the same type von Zylinderliner for various requirements or operating conditions, in particular to adapt to different services easily and efficiently or flexibly retrofit already in operation engines.
  • the invention thus relates to a cylinder arrangement for a longitudinally flushed reciprocating internal combustion engine, in particular for a slow-running longitudinally-flushed two-stroke large diesel engine, comprising a cylinder liner with a combustion chamber region and an inlet region, in which cylinder liner, a piston along a cylinder axis between a top dead center and a bottom dead center is reciprocally installable installable.
  • a scavenging air inlet with scavenging air openings is provided in the inlet region of the cylinder liner, so that scavenging air can be introduced from a receiver chamber into the combustion chamber region of the cylinder liner via the scavenging air opening.
  • a throttle element is provided and configured on the scavenging air inlet in such a way that a flow cross-section of the scavenging air opening can be reduced to a predefinable value so that a gas flow of scavenging air from the receiver chamber can be limited to a predefinable limit value via the scavenging air inlet into the cylinder liner.
  • the inventive throttle element at the scavenging air inlet can be provided in the scavenging air slots in the form of a molding, fresh air, as known per se from the prior art, flow into the combustion chamber of the cylinder at the scavenging cycle, but in the present invention by suitable choice of the size of Throttle element or by a suitable choice of the arrangement of the throttle element at the scavenging air openings of the scavenging air inlet of the flow cross-section one, several or all scavenging air are completely flexibly reduced so that a gas flow of scavenging air from the receiver space in the cylinder liner can be limited to a substantially arbitrary vorgebaren value.
  • the throttle element according to the invention By using the throttle element according to the invention, it is thus possible for the first time to flexibly adapt the amount of scavenging air which is to be supplied via the scavenging slots into the combustion chamber of the cylinder liner of the reciprocating internal combustion engine to any requirement in a very simple manner.
  • the Amount to be supplied in the operating state scavenging specially desired operating parameters of the internal combustion engine can be set for the first time in a very simple manner targeted.
  • the motors can be easily, flexibly and reliably adapted, for example, to save fuel or other supplies during operation and / or to adapt the motors to other main operating conditions.
  • a motor can be easily converted by the present invention, so that it is, for example, only optimally operable in a partial load operation and no longer in full load, which may be of great advantage, inter alia, if a ship only with throttled Speed should, for example to save fuel.
  • a throttle element according to the invention, different engines which are to be designed for different operating states, eg for different powers, one and the same type of cylinder liner can be used, so that, for example, for a motor which is designed for a relatively small power the same type of cylinder liner should be used as for any other engine that has a higher output. It is therefore no longer necessary to provide different types of cylinder liners, which of course is an enormous advantage from an economic point of view and leads to corresponding cost reduction not only in the production of the cylinder liners, but also simplifies maintenance and reduces the variety of spare parts to be kept available.
  • a throttle element according to the invention can be changed in its position by suitable adjusting elements during operation of the engine, so that the amount of scavenging air supplied per combustion cycle can be adjusted or adapted even during operation of the engine the engine can always be operated under optimal conditions.
  • suitable sensors may be provided, in particular on or in the cylinder liner, or be provided in the purge air or in the vicinity of the scavenging slots or a throttle element itself, so that, for example, a flow cross section of the scavenging slots as needed, in particular as a function of a through the sensor certain temperature, or by a pressure determined by the sensor, or, for example, in response to a determined by the sensor BN value of the lubricating oil is regulated and / or controllable adjustable.
  • nozzles or other metering devices can be provided at the flushing slots, which are preferred only when needed. For example, be activated only at light load, or when the piston is seized, or at a fast load change to a higher load or at a sign of corrosion.
  • These nozzles or metering devices could e.g. Lube oil or a liquid with a cleaning effect, for example, to clean the piston crown, injecting into the purging air.
  • the throttle elements designed as filler pieces can also be designed in such a way that they can easily protrude into the cylinder liner in the scavenging slots via the running surface and thus clean the piston crown during the upward stroke.
  • such throttle elements must be configured as patches that the piston rings overflow the patches without damage and optionally, can push away, preferably radially outward. These advantageously have a conical inlet. In the operating state, such patches are particularly preferably arranged so quickly movable in the scavenging slots that they are e.g. protrude into the cylinder liner only on the upstroke or only on the downstroke beyond the tread.
  • the filling pieces distributed over the circumference vary in height according to a predeterminable scheme.
  • the filling pieces distributed over the circumference could be formed in the circumferential direction so a kind of helix, whereby very specific rinsing effects can be generated, for example, the scavenging air is better swirled in the cylinder liner.
  • the cross section ie in particular the height and / or the width of the scavenging air opening, ie thus the maximum flow cross-section in comparison to a conventional Cylinder liner be enlarged, so that a larger area for adjusting the amount of purging air to be introduced into the cylinder liner is available.
  • the throttle element is configured as a shaped piece and provided interchangeably in a scavenging air opening of the scavenging air inlet of the cylinder liner.
  • the running of the piston is not affected on the cylinder surface and it does not cause damage to the tread, scavenging or piston forms an axis of the cylinder facing the inside of the molding an integral part of a cylinder surface of the cylinder liner. That is, the inside of the fitting is designed so that it substantially seamlessly and without affecting the piston running behavior negatively influences the actual cylinder surface of the cylinder liner.
  • Corresponding geometrical measures are preferably provided on the fitting and on the scavenging air opening in a manner known per se, so that the fitting can be fixed replaceably, but reliably.
  • grooves may be provided on the shaped piece or on the cylinder liner or scavenging air inlet or on the scavenging air opening, so that the throttle element, in particular the molded piece, can be securely anchored to the cylinder liner.
  • the throttle element may also be bolted to the outside of the cylinder liner or be fixed by any other measure known per se to limit the flow cross section of the scavenging air opening on the cylinder liner.
  • the shaped piece of the invention can be designed and provided on the scavenging air inlet in such a way that it limits the flow cross-section simultaneously to at least two, to more than two or all scavenging air openings of the scavenging air inlet.
  • the amount of purging air can also be adjusted in addition, that no throttle element is provided on at least one scavenging air, wherein the throttle elements can be provided with respect to a circumferential direction of the cylinder liner advantageously according to a predetermined symmetrical scheme at the scavenging air openings of the scavenging air inlet. Also, between each circumferentially directly adjacent throttle elements in each case an equal number of purging air openings may be present, on which no throttle element is provided.
  • Such and similar measures can not only serve to set or limit the amount of purging air to be introduced into the combustion chamber per combustion cycle. But due to the special arrangement of the throttle elements only at individual scavenging air and not at all scavenging air and the shape of the flow of the scavenging air upon entering the cylinder liner can be favorably influenced, so that, for example, the flushing of the combustion gases or the distribution of the scavenging air in the cylinder liner can be optimized can.
  • the throttle element may also be provided as throttle ring at the inlet area on the cylinder liner in such a covering manner over a predeterminable area of the scavenging air inlet that a flow cross section of a predeterminable number of scavenging air openings is concurrently, at least partially covered. It may be a complete ring, so that all scavenging air openings in a predetermined range by the Throttle ring are covered.
  • the ring can also have suitable recesses for certain scavenging air openings, so that some scavenging air openings are not covered at all or in a smaller area, so that the flow of scavenging air at different scavenging air openings can be of different sizes.
  • the flow cross-section of at least one purge air opening can even be completely closed by the throttle element.
  • the throttle element is provided, for example, only in the upper region of the scavenging air opening. That is to say the throttle element is provided at the scavenging air opening of the scavenging air inlet such that the flow cross section is limited in a predeterminable region of the scavenging air inlet facing the combustion chamber region such that no scavenging air can be introduced through the scavenging air opening into the cylinder liner between the throttle element and the combustion chamber region.
  • the throttle element can also be provided in the lower region of the scavenging air opening, that is to say provided on the scavenging air opening of the scavenging air inlet such that the flow cross section is limited in a predeterminable region of the scavenging air inlet facing away from the combustion chamber region such that no scavenging air flows through the scavenging air opening between the throttle element and the receiver space can be introduced into the cylinder liner.
  • the throttle element can also be provided in a central region of the scavenging air opening and thus provided on the scavenging air opening of the scavenging air inlet, that the flow cross-section is limited in a predeterminable region of the scavenging air inlet such that both between the throttle element and the combustion chamber region and between the throttle element and the receiver room at the same time scavenging air can be introduced through the scavenging air in the cylinder liner.
  • the throttle element is provided on the purge air inlet such that a position of at least the throttle element in the operating state of the reciprocating internal combustion engine is not changeable.
  • the throttle element is provided on the scavenging air inlet, that the position of at least one throttle element even in the operating state of the reciprocating internal combustion engine is variable, preferably by means of a controllable or controllable mechanical, electrical, pneumatic, hydraulic or other positioning is changeable.
  • the amount of purge air may vary even during the operating condition Operating parameters are set automatically via a controller or regulation or even by an operator.
  • the invention further relates to a throttle element for a cylinder liner of a cylinder assembly of the present invention, which may be, for example, a replacement part or a replacement part.
  • Fig. 1 shows in a schematic representation partially in section a cylinder assembly 1 'with cylinder liner 2', piston 3 'and fresh air supply system 400'.
  • the cylinder assembly 1 'of Fig. 1 is a typical arrangement well known for prior art longitudinally scavenged two-stroke large diesel engines.
  • the corresponding reference numerals are provided with an apostrophe, while the reference numerals to features according to the invention cylinder arrangements wear no apostrophe.
  • the arrangement comprises a cylinder liner 2 'in which a piston 3' is arranged to be movable back and forth along a cylinder running surface 211 'of a cylinder wall 210' of the cylinder liner 2 '.
  • the piston 3 ' comprises a piston ring packing 31', which is shown here schematically with only two piston rings.
  • the combustion chamber 200 ' which is located in the combustion chamber region 21' of the cylinder 2 ', is delimited at the top by a cylinder cover with an injection nozzle and exhaust valve.
  • the piston 3 ' which reciprocates in the operating state of the large diesel engine between the top dead center OT' and the bottom dead center UT ', via the piston rod 8' with a in Fig. 1 not shown crosshead, from which the reciprocating movement of the piston 3 'is transmitted to the crankshaft, also not shown, of the machine.
  • the piston rod 8 ' is guided through the receiver space 401', which adjoins the inlet area 22 'of the cylinder liner 2' below, and the stuffing box 402 ', which seals the receiver space 401' against the crankshaft space below, so that no fresh air 41 ', symbolized by the arrow 41', which supplies a likewise not shown turbocharger under a high pressure, for example, under a pressure of about four bar in the receiver room 401 ', from the receiver room 401' in the underlying crankshaft space 9 'can pass ,
  • Fig. 1 can be seen and is generally known, is in the receiver chamber 401 'always generated by the turbocharger gas pressure of the fresh air 41', which thus always by design rests on the piston bottom of the piston 3 '.
  • FIGS. 2a to 2c an exemplary embodiment of a cylinder arrangement according to the invention which is particularly preferred for practice will be described in greater detail. It shows Fig. 2a an inventive cylinder arrangement in overview, while Fig. 2b the area of the scavenging air inlet according to Fig. 2a in a more detailed representation shows and based on the Fig. 2c a scavenging air opening with throttle element in the form of a fitting according to Fig. 2a respectively. Fig. 2b you can see.
  • the inventive cylinder assembly 1 according to Fig. 2a to Fig. 2c are typical of a longitudinally flushed reciprocating internal combustion engine in a refinement of a slow-running longitudinally-flushed two-stroke large diesel engine.
  • the cylinder arrangement according to Fig. 2a comprises a cylinder liner 2 having a combustion chamber region 21 and an inlet region 22, in which cylinder liner 2 a piston 3 is installed along a cylinder axis Z between a top dead center OT and a bottom dead center UT.
  • a scavenging air inlet 221 with scavenging air openings 2211 is provided in the inlet region 22 of the cylinder liner 2, so that off a receiver room 401 scavenging air 41 via the scavenging air opening 2211 in the combustion chamber region 21 of the cylinder liner 2 can be introduced.
  • a throttle element 5, in the present case a shaped part 51, is designed and provided on the scavenging air inlet 221 such that a flow cross section 410 of the scavenging air opening 2211 can be reduced to a predefinable value, so that a gas flow 411 of scavenging air 41 out of the receiver chamber 401 the scavenging air inlet 221 in the cylinder liner 2 can be limited to a predeterminable limit value.
  • the configured as a shaped piece 51 throttle element 5 is interchangeable in all purge air openings 2211 of the scavenging air inlet 221 of the cylinder liner 2 is provided.
  • the fitting 51 is thus in this particular embodiment, an insert that, for example, in a suitable groove of the scavenging air opening 2211 may be anchored or otherwise in the known manner, I can be releasably attached.
  • An inner side 511 of the shaped part 51 facing the cylinder axis Z forms an integral part of a cylinder running surface 211 of the cylinder liner 2.
  • the shaped part 51 is thus designed and provided on the scavenging air inlet 221 such that it has the flow cross section 410 at all scavenging air openings 2211 of the scavenging air inlet 221 simultaneously and similarly limited.
  • the throttle element 5, so here the fitting 51 is in the Fig. 2a to Fig. 2c according to the representation installed in the upper region of the scavenging air openings 2211, ie provided on the scavenging air opening 2211 of the scavenging air inlet 221 that the flow cross-section is limited in a predeterminable region of the scavenging air inlet facing the combustion chamber area that no purge air can be introduced through the purge air opening into the cylinder liner between the throttle element and the combustion chamber region.
  • the throttle element 5, so the fitting 51 is provided so releasably on the scavenging air inlet that a position of the fitting 51 is not changeable in the operating state of the reciprocating internal combustion engine, but only in the non-operating state of the internal combustion engine, e.g. can be exchanged during maintenance.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
EP15195158.9A 2014-12-22 2015-11-18 Système de cylindre pour un moteur à combustion à piston élévateur rincé en longueur, ainsi qu'élément d'étranglement pour un revêtement de cylindre Withdrawn EP3037639A3 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15195158.9A EP3037639A3 (fr) 2014-12-22 2015-11-18 Système de cylindre pour un moteur à combustion à piston élévateur rincé en longueur, ainsi qu'élément d'étranglement pour un revêtement de cylindre

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14199747 2014-12-22
EP15195158.9A EP3037639A3 (fr) 2014-12-22 2015-11-18 Système de cylindre pour un moteur à combustion à piston élévateur rincé en longueur, ainsi qu'élément d'étranglement pour un revêtement de cylindre

Publications (2)

Publication Number Publication Date
EP3037639A2 true EP3037639A2 (fr) 2016-06-29
EP3037639A3 EP3037639A3 (fr) 2016-07-13

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EP15195158.9A Withdrawn EP3037639A3 (fr) 2014-12-22 2015-11-18 Système de cylindre pour un moteur à combustion à piston élévateur rincé en longueur, ainsi qu'élément d'étranglement pour un revêtement de cylindre

Country Status (4)

Country Link
EP (1) EP3037639A3 (fr)
JP (1) JP6721324B2 (fr)
KR (1) KR20160076442A (fr)
CN (1) CN105715357B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112459915A (zh) * 2020-12-07 2021-03-09 山东华盛农业药械有限责任公司 具有节流增压功能的二冲程缸套缸体组合

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108661817B (zh) * 2018-05-10 2023-11-03 天津大学 可变扫气持续期的船用二冲程柴油机气缸套
EP3926154A1 (fr) * 2020-06-18 2021-12-22 Winterthur Gas & Diesel AG Gros moteur purgé longitudinalement

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5647623A (en) * 1979-09-21 1981-04-30 Mitsubishi Heavy Ind Ltd Scavenging equipment for two-cycle internal combustion engine
JPS60127451U (ja) * 1984-02-06 1985-08-27 富士重工業株式会社 ２サイクルエンジン用ダイカストシリンダ
JPS6121828U (ja) * 1984-07-13 1986-02-08 三菱重工業株式会社 ユニフロ−２サイクルエンジンの掃気ポ−ト

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
JPS5638512A (en) * 1979-09-05 1981-04-13 Mitsubishi Heavy Ind Ltd Two-cycle internal combustion engine
DE19507220A1 (de) * 1995-03-02 1996-09-05 Daimler Benz Ag Einlaßsystem für eine Zweitakt-Brennkraftmaschine
DE59609434D1 (de) * 1996-12-24 2002-08-14 Waertsilae Schweiz Ag Winterth Dieselmotor
EP0965739A3 (fr) * 1998-06-15 2000-07-26 Wärtsilä NSD Schweiz AG Moteur diesel
JP4279123B2 (ja) * 2003-04-21 2009-06-17 三菱重工業株式会社 掃気管制弁装置を備えた内燃機関
EP1936245B1 (fr) * 2006-12-18 2012-05-02 Wärtsilä Schweiz AG Piston doté d'un anneau collecteur d'huile
CN100560955C (zh) * 2007-03-30 2009-11-18 蔡学成 设置于二冲程柴油机气缸体内的阻碳罩
DE102008033420B4 (de) * 2008-07-16 2010-06-24 Man Diesel Filial Af Man Diesel Se, Tyskland Verfahren zum Betrieb eines Zweitaktmotors und Vorrichtung zur Durchführung dieses Verfahrens
GB2473446B (en) * 2009-09-09 2014-06-11 Univ Brunel Two stroke internal combustion engine with a blower air reservoir
JP5770015B2 (ja) * 2010-06-22 2015-08-26 川崎重工業株式会社 空気掃気型の２サイクルエンジン

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5647623A (en) * 1979-09-21 1981-04-30 Mitsubishi Heavy Ind Ltd Scavenging equipment for two-cycle internal combustion engine
JPS60127451U (ja) * 1984-02-06 1985-08-27 富士重工業株式会社 ２サイクルエンジン用ダイカストシリンダ
JPS6121828U (ja) * 1984-07-13 1986-02-08 三菱重工業株式会社 ユニフロ−２サイクルエンジンの掃気ポ−ト

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112459915A (zh) * 2020-12-07 2021-03-09 山东华盛农业药械有限责任公司 具有节流增压功能的二冲程缸套缸体组合

Also Published As

Publication number Publication date
JP2016118198A (ja) 2016-06-30
KR20160076442A (ko) 2016-06-30
CN105715357A (zh) 2016-06-29
EP3037639A3 (fr) 2016-07-13
CN105715357B (zh) 2020-01-10
JP6721324B2 (ja) 2020-07-15

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