EP3192994A2 - Turbulateurs pour un moteur à combustion interne - Google Patents

Turbulateurs pour un moteur à combustion interne Download PDF

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Publication number
EP3192994A2
EP3192994A2 EP16204988.6A EP16204988A EP3192994A2 EP 3192994 A2 EP3192994 A2 EP 3192994A2 EP 16204988 A EP16204988 A EP 16204988A EP 3192994 A2 EP3192994 A2 EP 3192994A2
Authority
EP
European Patent Office
Prior art keywords
turbulators
cylinder
piston
fuel
scraper ring
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
EP16204988.6A
Other languages
German (de)
English (en)
Other versions
EP3192994B1 (fr
EP3192994A3 (fr
Inventor
Hans-Bernhard Snuis
Jörg SCHELLE
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.)
Caterpillar Energy Solutions GmbH
Original Assignee
Caterpillar Energy Solutions GmbH
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 Caterpillar Energy Solutions GmbH filed Critical Caterpillar Energy Solutions GmbH
Publication of EP3192994A2 publication Critical patent/EP3192994A2/fr
Publication of EP3192994A3 publication Critical patent/EP3192994A3/fr
Application granted granted Critical
Publication of EP3192994B1 publication Critical patent/EP3192994B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M29/00—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture
    • 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
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • 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
    • 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 
    • F02F3/28—Other pistons with specially-shaped head

Definitions

  • the present disclosure relates generally to an internal combustion engine.
  • the present disclosure relates to a structure for inducing turbulence in an internal combustion engine.
  • a piston moves between a top dead center and a bottom dead center to perform various strokes of the internal combustion engine.
  • a compression stroke the piston moves from a bottom dead center to a top dead center in the cylinder to compress fuel-air mixture.
  • the fuel-air mixture is confined in a limited volume in the combustion chamber of the internal combustion engine. It is desirable to induce turbulence in the fuel-air mixture in the combustion chamber for achieving better combustion.
  • German Patent Publication No. DE10121852 A1 discloses a flame ring with grooves to increase elasticity of the flame ring, and prevent the ring from failure due to thermal load.
  • PCT Publication No. WO 97/03280 discloses a coke scraper ring with grooves to prevent damage to the piston rings.
  • a coke scraper ring for placement proximate to a top dead center in a cylinder of an internal combustion engine is disclosed.
  • the coke scraper ring includes an inner surface that is configured to face a fuel-air mixture.
  • a plurality of turbulators are formed on the inner surface for inducing turbulence in the fuel-air mixture.
  • a cylinder for an internal combustion engine in another aspect, includes an inner surface that faces a fuel-air mixture and a plurality of turbulators are formed at an upper portion of the inner surface.
  • a piston for an internal combustion engine includes a top surface having a plurality of turbulators for inducing turbulence in fuel-air mixture.
  • Exemplary embodiments of a coke scraper ring, a cylinder or a piston may comprise a combination of protrusions and indentations forming the turbulators.
  • FIG. 1 illustrates an engine 10 with a cylinder block 12, a cylinder head 14, a piston 16, a coke scraper ring 18 and plurality of turbulators 20 formed on the coke scraper ring 18.
  • the engine 10 may be any internal combustion engine, for example a diesel engine, a petrol engine or any gas engine.
  • the engine 10 may provide power to any machine or system coupled to the engine 10.
  • the cylinder block 12, cylinder head 14 and the piston 16 may together enclose a volume to define a combustion chamber 22.
  • the volume of the combustion chamber 22 may vary with movement of the piston 16 in the cylinder block 12.
  • the cylinder block 12 defines a cylinder 13 that reciprocally receives the piston 16.
  • the cylinder block 12 may define a multiple cylinders.
  • the piston 16 may reciprocate in the cylinder 13 between a top dead center 24 and a bottom dead center 26 within the cylinder block 12.
  • the piston 16 may reciprocate between the top dead center 24 and the bottom dead center 26 for performing various strokes of the engine 10.
  • the cylinder head 14 may cover one end of the cylinder 13 near the top dead center 24.
  • the cylinder head 14 may have openings for arrangement of various devices, for example valves 42, injectors or spark plugs 44, conduits, etc., as required for working of the engine 10.
  • the piston 16 may be fitted with piston rings 19 to seal a clearance between the cylinder 13 and the piston 16.
  • the piston 16 may have a top surface 30 that is configured to face the fuel-air mixture.
  • the piston 16 may be coupled to a crankshaft (not shown) via a piston rod 17 for converting the linear motion imparted to the piston 16 by the combustion of fuel-air mixture into a rotary motion, as known in the art.
  • the coke scraper ring 18 may be disposed in an annular recess 21 at an upper portion of the cylinder 13 near the top dead center 24.
  • the coke scraper ring 18 may scrap away the coke deposits from the piston 16 to prevent damage to the cylinder 13 by abrasion.
  • the coke scraper ring 18 is positioned such that movement of the piston 16 towards the top dead center 24 results in scraping away of coke deposits on the piston 16, for example coke deposits on the top surface 30.
  • the coke scraper ring 18 has an inner surface 34.
  • the internal diameter of the coke scraper ring 18 may be slightly lesser than the diameter of the cylinder 13.
  • the inner surface 34 may have a bottom edge 36 and a top edge 38. The bottom edge 36 may scrap away coke deposits from the piston 16 when the piston 16 approaches and passes across the bottom edge 36 of the coke scraper ring 18.
  • the turbulators 20 are positioned on the coke scraper ring 18 to enhance the turbulence in the combustion chamber 22.
  • the turbulators 20 may be a protrusion or an indentation such that the movement or flow of the fuel-air mixture across the turbulators 20 may convert a linear flow of the fuel-air mixture into a turbulent flow.
  • the turbulators 20 may be positioned on the coke scraper ring 18 proximate to the top dead center 24.
  • each turbulator 20 has a planar section 46 and a curved section 48.
  • the planar section 46 has a stumbling edge 50 formed at the transition of the planar section 46 and the cylinder 13.
  • the planar section 46 further has a circular edge 52 formed at the transition of the planar section 46 into the curved section 48.
  • the curved section 48 further has a curved edge 54 formed at the transition of curved section 48 and the cylinder 13.
  • the planar section 46 and the curved section 48 together define a part-cylindrical recess or indentations as turbulator 20.
  • the turbulators 20 are substantially oriented horizontally to interact with a swirl flow in the combustion chamber 22.
  • FIG. 2 illustrates another embodiment of the engine 10 in accordance with the present disclosure.
  • the cylinder 13 defines an inner surface 34 at an upper portion of the cylinder 13.
  • the inner surface 34 is configured to face fuel-air mixture proximate to the top dead center 24.
  • the turbulators 20 are provided on the inner surface 34 of the cylinder 13. As illustrated, the turbulators 20 are shown as part-cylindrical protrusions on the inner surface 34.
  • FIG. 3 illustrates an embodiment of the engine 10 in accordance with the present disclosure, where the cylinder block 12 receives a cylinder liner 40 for defining the cylinder 13.
  • the turbulators 20 may be provided on the inner surface 34 defined by the cylinder liner 40 proximate to the top dead center 24. As illustrated, the turbulators 20 are shown as part-cylindrical protrusions on the inner surface 34.
  • FIG. 4 illustrates an embodiment of the engine 10 in accordance with the present disclosure.
  • the top surface 30 of the piston 16 may be provided with the turbulators 20 in form of protrusions on the top surface 30.
  • the turbulators 20 on the top surface 30 may enhance turbulence in the combustion chamber 22.
  • the turbulators 20 on the top surface 30 of the piston 16 may interact with a tumble flow or a squish flow in the combustion chamber 22 to enhance turbulence.
  • the turbulators 20 may also be positioned on the inner surface 34 of the coke scraper ring 18.
  • the turbulators 20 as shown in FIG. 4 may be a combination of protrusion and indentations on the inner surface 34. It may be understood by the person skilled in the art that the turbulators 20 may only be provided on either on the top surface 30 of the piston 16 or on the coke scraper ring 18. It may further be understood by a person skilled in the art that for purpose of illustration, the turbulators 20 in FIG. 4 are provided on the coke scraper ring 18. In an alternate embodiment, as discussed above, the turbulators 20 may be provided on an inner surface 34 defined by a cylinder liner 40.
  • a suitable number of turbulators 20 may be provided on the inner surface 34 or the piston 16.
  • a plurality of turbulators 20 may be positioned symmetrically or asymmetrically as suitable according to the size or configuration of the engine 10.
  • turbulators 20 in form of a protrusion or recess in any suitable shape and size may be provided.
  • An embodiment may be contemplated wherein the turbulators 20 may be provided in a combination of protrusions and indentations.
  • the turbulators 20 may be asymmetric in shape.
  • the turbulators 20 may be oriented according to a flow of fuel-air mixture in the combustion chamber22.
  • the turbulators 20 may be oriented according to direction of swirl in the combustion chamber 22 in order to interact effectively with a swirl flow to enhance overall turbulence in the combustion chamber 22.
  • the shape and dimensions of the turbulators 20 may be designed such as to not hamper the movement of piston 16 inside the cylinder block 12.
  • the present disclosure provides for turbulators 20 for an engine 10.
  • the turbulators 20 in accordance with the present disclosure may enhance turbulence in the fuel-air mixture in the combustion chamber 22 of the engine 10.
  • the fuel-air mixture may not have adequate turbulence for effective combustion of the fuel-air mixture.
  • the turbulators 20 in accordance with the present disclosure may enhance the turbulence in the fuel-air mixture in the combustion chamber 22 for better combustion of the fuel-air mixture.
  • the turbulators 20 in accordance with the present disclosure may enhance efficiency of the engine 10 by improving combustion in the combustion chamber 22 of the engine 10.
  • the turbulators 20 in accordance with the present disclosure may improve emissions from the engine 10 by facilitating fuller combustion of the fuel-air mixture.
  • the turbulators 20 in accordance with the present disclosure may be provided on any of the coke scraper ring 18, cylinder block 12, cylinder liner 40 or piston 16 for enhancing turbulence in the combustion chamber 22.
  • the turbulators 20 in accordance with the present disclosure may be any recess or protrusion or a combination thereof on a cylinder 13 proximate to the top dead center 24 of the engine 10.
  • the turbulators 20 in accordance with the present disclosure may be retrofitted in any internal combustion engine.
  • the turbulators 20 may be formed on the cylinder 13 during overhaul or repairing of the engine 10 to improve the efficiency of the engine 10.
  • a coke scraper ring 18 with turbulators 20 may be put in the engine 10 during an overhaul, repair or service of the engine 10.
  • the turbulators 20 may be formed on the cylinder liner 40 or cylinder 13 during servicing.

Landscapes

  • 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)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
  • Coke Industry (AREA)
EP16204988.6A 2016-01-15 2016-12-19 Turbulateurs pour un moteur à combustion interne Active EP3192994B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1600792.4A GB2546313A (en) 2016-01-15 2016-01-15 Turbulators for an internal combustion engine

Publications (3)

Publication Number Publication Date
EP3192994A2 true EP3192994A2 (fr) 2017-07-19
EP3192994A3 EP3192994A3 (fr) 2017-08-16
EP3192994B1 EP3192994B1 (fr) 2023-01-25

Family

ID=55488030

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16204988.6A Active EP3192994B1 (fr) 2016-01-15 2016-12-19 Turbulateurs pour un moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP3192994B1 (fr)
GB (1) GB2546313A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109854360A (zh) * 2019-02-01 2019-06-07 华峰 燃烧室装置、气缸、发动机及汽油机
GB2612844A (en) * 2021-11-16 2023-05-17 Caterpillar Energy Solutions Gmbh Coke scraping ring, cylinder liner, cylinder, gas engine and gas engine operation method

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE262939C (fr) * 1911-12-02 1913-07-28
US2452238A (en) * 1948-01-07 1948-10-26 Hollingsworth Raphael Insert for changing the compression ratio of internal-combustion engines
DK174074B1 (da) * 1995-07-07 2002-05-21 Man B & W Diesel As Forbrændingsmotor med en koksskrabningsring i en cylinder
DE10121852C2 (de) * 2001-05-04 2003-04-17 Man B & W Diesel Ag Hubkolbenbrennkraftmaschine
US6609490B2 (en) * 2001-11-15 2003-08-26 John Flinchbaugh Piston head for a spark ignition engine
EP1679434A4 (fr) * 2003-10-16 2009-04-29 Riken Kk Moteur a combustion interne et bague d'installation de chemise
EP2243940A1 (fr) * 2009-04-06 2010-10-27 Wärtsilä Schweiz AG Dispositif de réduction destiné à la réduction d'une pression de gaz sur un paquet de bague de piston d'un moteur à combustion interne à piston élévateur
EP2535540B1 (fr) * 2011-06-16 2016-07-20 Wärtsilä Switzerland Ltd. Insert pour un cylindre d'un moteur à combustion interne
SE537333C2 (sv) * 2013-08-21 2015-04-07 Scania Cv Ab Cylinderfoder och förbränningsmotor med sådant cylinderfoder
WO2015054537A1 (fr) * 2013-10-10 2015-04-16 Speed Of Air, Inc. Moteur à combustion interne

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109854360A (zh) * 2019-02-01 2019-06-07 华峰 燃烧室装置、气缸、发动机及汽油机
CN109854360B (zh) * 2019-02-01 2023-06-30 华峰 燃烧室装置、气缸、发动机及汽油机
GB2612844A (en) * 2021-11-16 2023-05-17 Caterpillar Energy Solutions Gmbh Coke scraping ring, cylinder liner, cylinder, gas engine and gas engine operation method
WO2023088580A1 (fr) * 2021-11-16 2023-05-25 Caterpillar Energy Solutions Gmbh Bague de raclage de coke, chemise de cylindre, cylindre, moteur à gaz et procédé de fonctionnement de moteur à gaz
GB2612844B (en) * 2021-11-16 2024-02-28 Caterpillar Energy Solutions Gmbh Coke scraping ring, cylinder liner, cylinder, gas engine and gas engine operation method
US12607154B2 (en) 2021-11-16 2026-04-21 Caterpillar Energy Solutions Gmbh Coke scraping ring, cylinder liner, cylinder, gas engine and gas engine operation method

Also Published As

Publication number Publication date
EP3192994B1 (fr) 2023-01-25
EP3192994A3 (fr) 2017-08-16
GB2546313A (en) 2017-07-19
GB201600792D0 (en) 2016-03-02

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