EP0282462A1 - Unterwasserauspuffgerät für Motorboote - Google Patents

Unterwasserauspuffgerät für Motorboote Download PDF

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Publication number
EP0282462A1
EP0282462A1 EP88830085A EP88830085A EP0282462A1 EP 0282462 A1 EP0282462 A1 EP 0282462A1 EP 88830085 A EP88830085 A EP 88830085A EP 88830085 A EP88830085 A EP 88830085A EP 0282462 A1 EP0282462 A1 EP 0282462A1
Authority
EP
European Patent Office
Prior art keywords
exhaust device
water line
underwater
whose
underwater exhaust
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
EP88830085A
Other languages
English (en)
French (fr)
Other versions
EP0282462B1 (de
Inventor
Mario Amati
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0282462A1 publication Critical patent/EP0282462A1/de
Application granted granted Critical
Publication of EP0282462B1 publication Critical patent/EP0282462B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/12—Exhaust or silencing apparatus characterised by constructional features specially adapted for submerged exhausting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/32—Arrangements of propulsion power-unit exhaust uptakes; Funnels peculiar to vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/02—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for marine vessels or naval applications
    • 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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder

Definitions

  • the present invention refers to an underwater exhaust device for motorboats which is capable of reducing, not­withstanding its being substantially devoid of silencers, the disturbing exhaust noise in neutral and at low speed, and at the same time of overcoming further drawbacks occurring at average and high speed.
  • the conventional exhaust systems both for diesel and petrol engines, installed on trading, military or pleasure craft are provided with an exhaust pipe situated a hundred percent above the water line, both at transom and at broadside, it being possible in the latter case to provide the hull with external devices to send the exhaust gases abaft.
  • the device according to the invention is substantially devoid of silencers. Therefore, it offers many advantages, first of all merely depending on the absence of such silencers.
  • financial advantages resulting from the fact that it is not necessary to purchase and to install the silencers
  • technical advantages resulting from the increased power due to the absence of counter-­pressure, the absence of heat loss in the engine-room (provoked by the increased temperature created by the use of silencers), the absence of the silencers' weight
  • advantages concerning the space available for other uses resulting from the increased room in the engine room, which is normally taken up by silencers
  • ecological advan­tages resulting from the decreased exhaust fumes.
  • the exhaust device according to the invention is characterized by the fact that the device is provided with a main exhaust pipe, having at least the final portion below the water line, and a second­ary exhaust pipe of smaller section, which branches off from the main pipe and is entirely located above the water line.
  • the underwater exhaust device according to the present invention can be provided with an expansion chamber, in order to facilitate the emmission of gases from the main exhaust pipe.
  • This chamber can be created by hollowing the motorboat hull out in the shape of a parallelepiped having the section in the shape of a non-isosceles right-angled triangle, whose shorter side is substantially perpendicular to the water line, whose longer side is substantially parallel to the water line and whose hypotenuse is substan­tially inclined downwards towards the stern.
  • the above device can also be provided with a projecting element in the fore portion, on the bow side, of the expansion chamber, in order to increase the pressure drop in the chamber while the motorboat is moving forwards.
  • the projecting element can be shaped like a paral­lelepiped having the section in the shape of a non-isosce­les right angled triangle, whose shorter side is substan­tially perpendicular to the water line, whose longer side is substantially parallel to the water line and whose hypotenuse is substantially inclined upwards towards the bow.
  • hypertenuse inclined upwards towards the bow also includes an upwardly curving line going towards the bow, and which is substantially concave in its lower portion.
  • the end section of the secondary exhaust pipe can be provided with a silencer; the "Acqualift” type would be the most advantageous.
  • 1 stands for the motorboat hull provided with the underwater exhaust device according to the present invention.
  • the main exhaust pipe 3 branches off from the engine 2, which drives the propeller 2 ⁇ and ends in the expansion chamber 4, created by hollowing the motorboat hull out in the shape of a parellelepiped having the section in the shape of a non-isosceles right-angled triangle, whose shorter side is perpendicular to the water line, whose longer side is parallel to the water line and whose hypote­nuse is inclined downwards towards the stern.
  • a projecting element 5 is located in the fore portion of the expansion chamber 4 in the shape of a parellel­epiped, having the section of a non-isosceles right-­angled triangle, whose shorter side is perpendicular to the water line, whose longer side is parallel to the water line, and whose hypotenuse is inclined upwards towards the bow.
  • the main exhaust pipe 3 branches off into the secondary exhaust pipe 6 of smaller section; the latter is entirely located above the water line and before reaching the outside is connected to an "Acqualift" silencer 7, which contains the column of water 8 and the pipe 9, of which one end is in contact with the column of water 8 and the other end is open towards the outside.
  • the hull 1 is equipped with superstructures and rudder not shown in the figure.
  • the exhaust device according to the present invention is part of more complex systems, that is to say motorboat engines or motorboats themselves.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Exhaust Silencers (AREA)
  • Exhaust Gas After Treatment (AREA)
EP88830085A 1987-03-10 1988-03-02 Unterwasserauspuffgerät für Motorboote Expired EP0282462B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT4770587 1987-03-10
IT47705/87A IT1205740B (it) 1987-03-10 1987-03-10 Dispositivo per lo scarico subacqueo dei gas combusti di imbarcazioni a motore

Publications (2)

Publication Number Publication Date
EP0282462A1 true EP0282462A1 (de) 1988-09-14
EP0282462B1 EP0282462B1 (de) 1991-10-09

Family

ID=11262006

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88830085A Expired EP0282462B1 (de) 1987-03-10 1988-03-02 Unterwasserauspuffgerät für Motorboote

Country Status (4)

Country Link
EP (1) EP0282462B1 (de)
DE (1) DE3865327D1 (de)
ES (1) ES2027037T3 (de)
IT (1) IT1205740B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5234364A (en) * 1990-04-12 1993-08-10 Sanshin Kogyo Kabushiki Kaisha Exhaust system for small planing boat
US5676575A (en) * 1994-03-08 1997-10-14 Sanshin Kogyo Kabushiki Kaisha Exhaust system for watercraft

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10231152A1 (de) 2002-07-10 2004-02-12 Siemens Ag Elektrisches Energieversorgungssystem für ein Schiff, insbesondere für ein mit niedriger IR-Signatur betreibbares Marine(Navy)-Schiff

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4002136A (en) * 1975-10-14 1977-01-11 Ray Industries, Inc. Marine exhaust system
GB2065036A (en) * 1979-12-12 1981-06-24 Henwood M R Improvements in or relating to exhaust systems and/or boat hulls
US4393802A (en) * 1980-05-16 1983-07-19 Rizzo Salvatore A Boat hull with underside channel
EP0088640A2 (de) * 1982-03-09 1983-09-14 Akira Ikeda Schiff mit Abgasleitung durch den Boden

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4002136A (en) * 1975-10-14 1977-01-11 Ray Industries, Inc. Marine exhaust system
GB2065036A (en) * 1979-12-12 1981-06-24 Henwood M R Improvements in or relating to exhaust systems and/or boat hulls
US4393802A (en) * 1980-05-16 1983-07-19 Rizzo Salvatore A Boat hull with underside channel
EP0088640A2 (de) * 1982-03-09 1983-09-14 Akira Ikeda Schiff mit Abgasleitung durch den Boden

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5234364A (en) * 1990-04-12 1993-08-10 Sanshin Kogyo Kabushiki Kaisha Exhaust system for small planing boat
US5676575A (en) * 1994-03-08 1997-10-14 Sanshin Kogyo Kabushiki Kaisha Exhaust system for watercraft

Also Published As

Publication number Publication date
IT1205740B (it) 1989-03-31
ES2027037T3 (es) 1992-05-16
DE3865327D1 (de) 1991-11-14
EP0282462B1 (de) 1991-10-09
IT8747705A0 (it) 1987-03-10

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