WO2017072392A1 - Procédé de commande d'actionnement d'une unité de moteur à piston à combustion interne d'un navire - Google Patents

Procédé de commande d'actionnement d'une unité de moteur à piston à combustion interne d'un navire Download PDF

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Publication number
WO2017072392A1
WO2017072392A1 PCT/FI2015/050738 FI2015050738W WO2017072392A1 WO 2017072392 A1 WO2017072392 A1 WO 2017072392A1 FI 2015050738 W FI2015050738 W FI 2015050738W WO 2017072392 A1 WO2017072392 A1 WO 2017072392A1
Authority
WO
WIPO (PCT)
Prior art keywords
emission control
control system
controlling
internal combustion
piston engine
Prior art date
Application number
PCT/FI2015/050738
Other languages
English (en)
Inventor
Lucas ESSELSTRÖM
Vesa Hilakari
Niko SOIKKELI
Stefano FURLAN
Original Assignee
Wärtsilä 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 Wärtsilä Finland Oy filed Critical Wärtsilä Finland Oy
Priority to PCT/FI2015/050738 priority Critical patent/WO2017072392A1/fr
Publication of WO2017072392A1 publication Critical patent/WO2017072392A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F01N3/208—Control of selective catalytic reduction [SCR], e.g. dosing of reducing agent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0002—Controlling intake air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D41/1406—Introducing closed-loop corrections characterised by the control or regulation method with use of a optimisation method, e.g. iteration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • 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
    • 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
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/12—Parameters used for exhaust control or diagnosing said parameters being related to the vehicle exterior
    • 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
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
    • F01N2900/1622—Catalyst reducing agent absorption capacity or consumption amount
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0002—Controlling intake air
    • F02D2041/001—Controlling intake air for engines with variable valve actuation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0625—Fuel consumption, e.g. measured in fuel liters per 100 kms or miles per gallon
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
    • F02D2200/701—Information about vehicle position, e.g. from navigation system or GPS signal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/36—Control for minimising NOx emissions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • [001 ] Invention relates to the field of internal combustion engines in marine vessels. Particularly the present invention relates to method of controlling the operation of an internal combustion piston engine plant in a marine vessel according to the preamble of claim 1 .
  • ECA Emission Control Areas
  • An object of the invention is to provide a method of controlling the operation of an internal combustion piston engine plant in a marine ves- sel in which the performance is considerably improved compared to the prior art solutions.
  • the method of controlling the operation of an internal combustion piston engine plant in a marine vessel is applicable to the plant comprising at least one internal combustion piston engine provided with an internal emission control system, and an external emission control system which is arranged in the exhaust system of said at least one internal combustion piston engine, wherein the method comprises during the operation of the internal combustion piston engine plant acquiring or determining a limit value of emissions of substances which the internal emission control system and the external emission control system are arranged to control, assigning a loss factor relating to both the internal emission control system and the external emission control system, con- trolling the internal emission control system such that a first reduction of emissions is obtained and controlling the external emission control sys- tern such that a second reduction of emissions is obtained, controlling the internal emission control system and the external emission control system such that the combined first and second reduction provides total emission of substances less than, or equal to the determined limit value of emissions, and setting the ratio of the first reduction obtained by the internal emission control system to the second reduction obtained by the external emission control system such that the total loss factor is minimized.
  • the step of acquiring or determining a limit value for emissions comprises acquiring or determining a limit value for NOx- emissions in the exhaust gases of the internal combustion piston engine plant.
  • the loss factor is quantitative consumption of fuel and/or reactant used in the external emission control system.
  • the loss factor is fi- nancial value of consumption of fuel and/or reactant used in the external emission control system.
  • the ambient air temperature and/or humidity is measured and the internal emission control system and/or the external emission control system is controlled making use of the measured ambient air temperature and/or humidity.
  • controlling the internal emission control system comprises adjusting the timing and/or dura- tion and/or amount of fuel injected into each of the cylinders of the engine.
  • controlling the internal emission control system comprises adjusting the timing of gas exchange valve or valves of the engine.
  • controlling the internal emission control system comprises adjusting the timing and/or duration and/or amount of fuel injected into each of the cylinders of the engine and adjusting the timing of gas exchange valve or valves of the engine.
  • the internal emission control system is controlled to obtain the first reduction of emissions which is less than the maximum emission reduction of the internal emission control system.
  • controlling the external emission control system comprises controlling an exhaust gas selective catalytic reduction of emissions.
  • controlling the exhaust gas selective catalytic reduction of emissions corn-prises controlling an amount of admission of a reducing agent to the process.
  • the ratio of the first reduction to the second reduction is determined based on an average value of the loss variable over a predetermined period of usage of the internal combustion piston engine plant.
  • the method com- prises providing an emission control map by assigning geographical areas with one or more predetermined emission restrictions which are set for the plant, acquiring location information of the vessel, and acquiring the limit value of emissions of substances based on the emission control map and the location information of the vessel.
  • Figure 1 illustrates a marine vessel according to the invention.
  • FIG. 1 depicts schematically a marine vessel 10 and an internal combustion piston engine plant 12, which is called simply as the plant in the following, arranged into the vessel 10.
  • the internal combustion piston engine 16 of the plant 12 is coupled to rotate a generator 17 which in turn is coupled to an electric grid 14 of the vessel via suitable converter 19, such as a frequency converter 19.
  • the internal combustion piston engine plant 12 comprises usually several internal combustion piston engines arranged to produce electric power to the vessel's electric grid 14. The power may be used in a propulsion system of the vessel or in other technical systems, and also in fulfilling the demand of a so called hotel load of the vessel.
  • the plant 12 is provided with at least one internal combustion piston engine 16, which is called as an engine in the following.
  • the engine and its operation is known as such for a skilled person.
  • the engine 16 is provided with an exhaust gas system including a channel 22 leading from the engine to the environment.
  • the engine 16 is provided with an internal emission control system 18 and an external emission control system 20.
  • the external emission control system 20 is arranged in the exhaust gas system of the engine 16.
  • the internal refers internal to the engine and the external refers external to the engine.
  • the internal emission control system 18 comprises a control unit 24 arranged to control the combustion process of the engine.
  • the control unit 24 comprises a computer and instructions executable by the computer to operate the engine, particularly the combustion process, which instructions are executed in the computer to accomplish the control process.
  • the computer is ar- ranged to control actuators in the engine to implement the control instructions into the operation of the engine.
  • the control unit 24 comprises means for controlling the fuel admission to the engine based on various variables.
  • the control unit 24 comprises means for controlling the gas exchange valve or valves of the engine based on various variables, to control the gas exchange and/or effective compression ratio of the engine.
  • the control unit 24 is arranged to calculate or define in other manners a specific fuel oil consumption (SFOC) i.e. consumed fuel per produced power by executing the control instructions.
  • SFOC fuel oil consumption
  • the external emission control system 20 comprises selective catalytic reduction (SCR) unit 25.
  • the external emission control system 20 is provided with a reactant introduction unit 26 which is followed, in the gas flow direction, by a mixing zone 28 and finally the SCR unit 25, in the exhaust gas system of the engine.
  • the reactant introduction unit 26 is arranged to introduce a controllable amount of reactant, such as ammonia or urea solution, into the mixing zone 28.
  • the reactant is used in the SCR unit to accomplish the desired reactions in the gas which will result in reduction of NOx emis- sions in the exhaust gases of the engine.
  • the SCR unit requires tuning to properly perform.
  • Part of tuning involves ensuring a proper distribution of reactant, such as ammonia in the gas stream and uniform gas velocity through the catalyst. Without tuning, SCRs can exhibit inefficient NOx reduction along with excessive ammonia slip due to not utilizing the cata- lyst surface area effectively.
  • the exhaust gas system is provided with a NOx probe 30 arranged to detect the NOx content in the exhaust gas downstream the SCR unit 25 in the exhaust gas channel 22.
  • the probe 30 is connected to the control unit 24 to facilitate a closed loop control.
  • the plant 12 is provided with detection system 32 of properties of ambient air.
  • the detec- tion system comprises instruments 34 for measuring or determining the temperature and humidity of the air which is used as combustion air of the engine. Preferably the properties are determined or measure at the inlet of the combustion air channel of the engine.
  • the operation of the internal combustion piston engine plant 12 is controlled such that during the operation of the plant 12 firstly a limit value of emission of certain predetermined substances is acquired. Particularly the limit value is a limit value of NOx emissions in the exhaust gas of the plant.
  • the limit value may be stored in or otherwise made available to the control unit 24 of the engine.
  • a loss factor is assigned for operation, or using, of both the internal emission control system 18 and the external emission control system 20. The loss factor relates to service wear, operating cost or other such loss element which follows from operation of the emission control systems.
  • the internal emission control system is controlled and operated such that a first reduction of emissions is obtained, and the external emission control system is controlled and operated such that a second reduction of emissions is obtained. Additionally, the internal emission control system and the external emission control system are controlled such that the combined effect of the first and the second reduction pro- vides total emission of substances less than, or equal to the determined limit value of emissions.
  • the ratio of the first reduction obtained by the internal emission control system to the second reduction obtained by the external emission control system is controlled such that the loss factor is minimized.
  • the internal emission control system and the external emission control system are operated so that the loss factor is minimized, while the obtained combined effect meets the demand of the determined limit value of emissions.
  • the loss factor is quantitative consumption of fuel in the engine and/or reactant used in the external emission control system.
  • the loss factor is an adjusted quantitative consump- tion of fuel and/or reactant used in the external emission control system.
  • the selection between employing the internal and external emission control system may weighted with certain preferences after which a weighted ratio of the first reduction obtained by the internal emission control system to the second reduction obtained by the external emission control system is set such that the total loss factor is minimized.
  • the weight may be defined for example based on remaining supplies of the fuel and reactant for the SCR in the vessel.
  • the adjusted quantitative consumption is the financial value of consumption of fuel used in the engine and/or reactant used in the external emission control system. The financially value is obtained by multiplying the consumption with unit price of the fuel or the re- actant.
  • the ambient air temperature and/or humidity is measured and the internal emission control system and/or the external emission control system is controlled making use of the measured ambient air temperature and/or humidity. Taking the ambient conditions into the account the risk of NH3 slip from SCR unit is minimized. This way the proper ammonia flow for all process conditions is obtained.
  • Ammonia flow is in general controlled based on NOx measurements taken from the gas stream or pre-determined performance curves of the engine together with controlling the internal emission control system according to the invention.
  • Ammonia slip is a term for ammonia passing through the SCR unit un-reacted.
  • the limit value of emission substances is based on the location of the vessel.
  • the method comprises providing an emission control map by assigning geographical areas with one or more emission restrictions which are set for the plant, acquiring location information of the vessel, acquiring the limit value of emissions of substances based on the emis- sion control map and the location information of the vessel.
  • the vessel 10 is provided with satellite position / navigation system 36 e.g. a global positioning system connected to provide location information to the control unit 24.
  • satellite position / navigation system 36 e.g. a global positioning system connected to provide location information to the control unit 24.
  • the limit value of NOx emission is such that the total adjusted cycle emission limit is for example 17 g/kWh.
  • the calculated loss factor for fuel is higher than the calculated loss factor for reactant for the SCR unit.
  • the engine may be controlled such that it alone may reach the limit value of 17 g/kWh without using of the SCR unit.
  • the determined limit value for NOx emission is 17 g/kWh and the internal emission control system i.e. the combustion process, and the external emission control system are controlled such that the total loss factor is minimized.
  • the share of the combustion process in meeting the limit value may be reduced and the share of the SCT process in meeting the limit value may be increased and still maintain the desired emission level while the total cost is minimized.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

La présente invention concerne un procédé de commande d'actionnement d'une unité (12) de moteur à piston à combustion interne dans un navire (10), le procédé comprenant, lors de l'actionnement de l'unité (12) de moteur à piston à combustion interne l'acquisition ou la détermination d'une valeur limite d'émission, l'attribution d'un facteur de perte relatif à la fois au système (18) de commande d'émission interne et au système (20) de commande d'émission externe, la commande du système de commande d'émission interne de telle sorte qu'une première réduction d'émission est obtenue, la commande du système de commande d'émission externe de telle sorte qu'une seconde réduction d'émission est obtenue, la commande du système de commande d'émission interne et du système de commande d'émission externe de telle sorte que la première et la seconde réduction combinées fournissent une émission totale inférieure, ou égale à la valeur limite déterminée d'émission, et un réglage du rapport de la première réduction obtenue par le système de commande d'émission interne à la seconde réduction obtenue par le système de commande d'émission externe de telle sorte que le facteur de perte total est minimisé.
PCT/FI2015/050738 2015-10-28 2015-10-28 Procédé de commande d'actionnement d'une unité de moteur à piston à combustion interne d'un navire WO2017072392A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/FI2015/050738 WO2017072392A1 (fr) 2015-10-28 2015-10-28 Procédé de commande d'actionnement d'une unité de moteur à piston à combustion interne d'un navire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2015/050738 WO2017072392A1 (fr) 2015-10-28 2015-10-28 Procédé de commande d'actionnement d'une unité de moteur à piston à combustion interne d'un navire

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WO2017072392A1 true WO2017072392A1 (fr) 2017-05-04

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2282037A1 (fr) * 2001-03-30 2011-02-09 Toyota Jidosha Kabushiki Kaisha Appareil de contrôle et procédé pour véhicule doté d'un moteur à combustion interne et d'une transmission variable continue
US20130067890A1 (en) * 2011-09-20 2013-03-21 Detroit Diesel Corporation Method of optimizing operating costs of an internal combustion engine
US20130152549A1 (en) * 2006-01-19 2013-06-20 Cummins Inc. Method and system for optimizing fuel and reductant consumption
US20130158848A1 (en) * 2011-12-16 2013-06-20 Shawn Gallagher Fuel selection method and related system for a mobile asset
US20140222317A1 (en) * 2012-11-14 2014-08-07 General Electric Company Multi-fuel system and method
WO2015155416A1 (fr) * 2014-04-10 2015-10-15 Wärtsilä Finland Oy Procédé de fonctionnement d'un système de puissance dans un navire marin et agencement de supervision pour un système de puissance dans un navire marin

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2282037A1 (fr) * 2001-03-30 2011-02-09 Toyota Jidosha Kabushiki Kaisha Appareil de contrôle et procédé pour véhicule doté d'un moteur à combustion interne et d'une transmission variable continue
US20130152549A1 (en) * 2006-01-19 2013-06-20 Cummins Inc. Method and system for optimizing fuel and reductant consumption
US20130067890A1 (en) * 2011-09-20 2013-03-21 Detroit Diesel Corporation Method of optimizing operating costs of an internal combustion engine
US20130158848A1 (en) * 2011-12-16 2013-06-20 Shawn Gallagher Fuel selection method and related system for a mobile asset
US20140222317A1 (en) * 2012-11-14 2014-08-07 General Electric Company Multi-fuel system and method
WO2015155416A1 (fr) * 2014-04-10 2015-10-15 Wärtsilä Finland Oy Procédé de fonctionnement d'un système de puissance dans un navire marin et agencement de supervision pour un système de puissance dans un navire marin

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