SG181946A1 - Method for switching the fuel supply to an internal combustion engine from a first fuel to a second fuel - Google Patents

Method for switching the fuel supply to an internal combustion engine from a first fuel to a second fuel Download PDF

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Publication number
SG181946A1
SG181946A1 SG2012047312A SG2012047312A SG181946A1 SG 181946 A1 SG181946 A1 SG 181946A1 SG 2012047312 A SG2012047312 A SG 2012047312A SG 2012047312 A SG2012047312 A SG 2012047312A SG 181946 A1 SG181946 A1 SG 181946A1
Authority
SG
Singapore
Prior art keywords
fuel
internal combustion
combustion engine
fraction
line
Prior art date
Application number
SG2012047312A
Inventor
Thomas Porep
Original Assignee
Porep 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 Porep Gmbh filed Critical Porep Gmbh
Publication of SG181946A1 publication Critical patent/SG181946A1/en

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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
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
    • F02D19/0649—Liquid fuels having different boiling temperatures, volatilities, densities, viscosities, cetane or octane numbers
    • F02D19/0657—Heavy or light fuel oils; Fuels characterised by their impurities such as sulfur content or differences in grade, e.g. for ships
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0626—Measuring or estimating parameters related to the fuel supply system
    • F02D19/0628—Determining the fuel pressure, temperature or flow, the fuel tank fill level or a valve position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
    • F02D19/081—Adjusting the fuel composition or mixing ratio; Transitioning from one fuel to the other
    • 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
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • 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
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/007—Layout or arrangement of systems for feeding fuel characterised by its use in vehicles, in stationary plants or in small engines, e.g. hand held tools
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
    • F02D19/0649—Liquid fuels having different boiling temperatures, volatilities, densities, viscosities, cetane or octane numbers
    • F02D19/0652—Biofuels, e.g. plant oils
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02D19/0673—Valves; Pressure or flow regulators; Mixers
    • 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
    • F02D2200/0611—Fuel type, fuel composition or fuel quality
    • F02D2200/0612—Fuel type, fuel composition or fuel quality determined by estimation
    • 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
    • F02D2200/0614—Actual fuel mass or fuel injection amount
    • 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
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

The invention relates to a method for switching the fuel supply to an internal combustion engine from a first fuel to a second fuel, comprising the steps of a) operating the internal combustion engine using the first fuel, b) lowering the fraction of the first fuel in the fuel line supplying the internal combustion engine and increasing the fraction of the second fuel in the fuel line supplying the internal combustion engine, c) operating the internal combustion engine using a fuel mixture comprising the first fuel and the second fuel, and d) repeating the steps b) and c) until the internal combustion engine is operated only using the second fuel, characterized by the steps of determining the flow rate of the first fuel in the line conducting the first fuel and/or determining the flow rate of the second fuel in the line conducting the second fuel and adjusting the fraction of the first fuel and the fraction of the second fuel in the fuel mixture based on the flow rate of the first fuel and/or second fuel.

Description

Method for switching the fuel supply to an internal combustion engine from a first fuel to a second fuel
The invention relates to a method for switching the fuel supply to an internal combustion engine from a first fuel to a second fuel, comprising the steps of a) operating the internal combustion engine using the first fuel, b) lowering the fraction of the first fuel in the fuel line supplying the internal combustion engine and increasing the fraction of the second fuel in the fuel line supplying the internal combustion engine, c) operating the internal combustion engine using a fuel mixture comprising the first fuel and the second fuel, and d) repeating the steps b) and c) until the internal combustion engine is operated only using the second fuel.
Such a method is known for example from WO 2009/067970 Al, this known method being in particular based on the problem that a marine engine had to be switched from the operation with a highly viscous heavy oil to a fuel of lower viscosity, that is diesel oil, it having been intended that the change in viscosity be compensated by adapting the temperature of the fuel or the fuel mixture.
A fundamental problem of all methods where the operation of an internal combustion engine is to be switched from the consumption of a first fuel to a second fuel consists in that at first a defined fuel mixture having defined properties must be produced that is changed in favour of the second fuel until the internal combustion engine can be operated only using the second fuel.
Adjusting the defined fuel mixture where for example defined fractions of first fuel and second fuel should be present, however turns out to be difficult on account of the different viscosities of the fuels used and different pressures, in particular if a uniform change of the fuel composition similar to a ramp function is desired.
Preliminary tests (not published) for this invention have in particular shown that the positions of 3/2 way rotary disc valves provide only insufficient information as to the fractions of first and second fuel in a fuel mixture.
_D-
Therefore the object of the invention is to provide a method and a system using which the fraction of first and second fuel can be precisely adjusted.
This object is achieved by the method having the features of Claim 1 and the system having the features of Claim 6. The sub claims specify advantageous designs of the invention.
The basic idea of the invention is to determine the flow rate of the first fuel in the line conducting the first fuel and/or determine the flow rate of the second fuel in the line conducting the second fuel before they are merged in the line that supplies fuel to the internal combustion engine, e.g. a marine engine. The position of a 3/2 way rotary disc valve that interconnects the first fuel line, the second fuel line and the third line supplying the fuel to the internal combustion engine, does not provide any information on the fractions of first and second fuel that are actually present in the third fuel line, on account of the different viscosity and pressure ratios of the types of fuel, so that the effects arising when mixing the types of fuel have to be determined empirically according to the valve position. The same applies for fuel-line arrangements where a valve each is provided in the first and in the second fuel line and the composition of the fuel mixture is a function of the setting of both valves.
The fuel composition of the fuel mixture can be inferred from the flow rate of at least one fuel - In particular if a measurement of the flow rate also takes place in the third fuel line, it being possible to regulate the fuel composition of the fuel mixture in a defined way by adjusting the corresponding actuator, e.g. the 3/2 way rotary disc valve. Here adjusting the actuator can also take place using the ratios of the flow rate of first or second fuel to the flow rate of the fuel mixture.
To this end, a control system that is connected to the at least one flow rate measuring device and acting on the at least one actuator for setting the fraction of the first fuel or for setting the fraction of the second fuel in the fuel mixture and that can create a smooth transition from the operation using a first fuel to the operation using a second fuel, for example according to a predetermined ramp function, using the flow rate of the first fuel and/or the second fuel or the change in the flow rate or rates that occur.
The inventive method is particularly suitable for marine engines that must be operated alternately with heavy oil and diesel oil, in particular marine diesel oil (MDQO), marine gas oil (MGO) or other low-viscous distillates. However, the method is also suitable for other engines, for example engines operated using diesel and rapeseed oil.

Claims (8)

  1. PATENT CLAIMS
    I. A method for switching the fuel supply to an internal combustion engine from a first fuel to a second fuel, comprising the steps of a) operating the internal combustion engine using the first fuel, b) lowering the fraction of the first fuel in the fuel line supplying the internal combustion engine and increasing the fraction of the second fuel in the fuel line supplying the internal combustion engine, c) operating the internal combustion engine using a fuel mixture comprising the first fuel and the second fuel, and d) repeating the steps b) and c) until the internal combustion engine is operated only using the second fuel, characterized by the steps of determining the flow rate of the first fuel in the line conducting the first fuel and/or determining the flow rate of the second fuel in the line conducting the second fuel and adjusting the fraction of the first fuel and the fraction of the second fuel in the fuel mixture based on the flow rate of the first fuel and/or second fuel.
  2. 2. The method according to Claim 1, characterised by determining the flow rate of the fuel of fuel mixture conducted in the fuel line supplying the internal combustion engine, adjusting the fraction of the first fuel and the fraction of the second fuel in the fuel mixture taking place using the ratio of the flow rate of the first fuel and/or second fuel and the flow rate of the fuel mixture.
  3. 3. The method according to one of the preceding claims, characterised in that adjusting the fraction of the first fuel and the fraction of the second fuel in the fuel mixture takes place using a 3/2 way rotary disc valve.
  4. 4. The method according to one of the preceding claims, characterised in that the first fuel is heavy oil and the second fuel is diesel oil.
  5. 5. The method according to one of the preceding claims, characterised in that the internal combustion engine is a marine engine.
  6. 6. A system for switching the fuel supply to an internal combustion engine from a first fuel to a second fuel, having — a first fuel line conducting a first fuel, — a second fuel line conducting a second fuel, — a third fuel line connecting the first and the second fuel line and supplying the internal combustion engine with fuel, and — at least one actuator for regulating the flow rate in the first and in the second fuel line, characterised by at least one flow rate measuring device arranged in the first fuel line and/or in the second fuel line, and a control system connected to the at least one flow rate measuring device and acting on the at least one actuator for adjusting the fraction of the first fuel or adjusting the fraction of the second fuel in the fuel mixture using the flow rate of the first fuel and/or the second fuel.
  7. 7. The system according to Claim 6, characterised in that the at least one actuator are is a 3/2 way rotary disc valve interconnecting the first fuel line, the second fuel line and the third fuel line.
  8. 8. The system according to one of Claims 6 and 7, characterised in that the internal combustion engine is a marine engine.
    0. The system according to one of Claims 6 to 8, characterised in that the first fuel is heavy oil and the second fuel is diesel oil.
SG2012047312A 2010-02-15 2011-02-14 Method for switching the fuel supply to an internal combustion engine from a first fuel to a second fuel SG181946A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010008097A DE102010008097A1 (en) 2010-02-15 2010-02-15 A method of switching the fuel supply to an internal combustion engine from a first fuel to a second fuel and system for carrying out the method
PCT/DE2011/000136 WO2011098077A1 (en) 2010-02-15 2011-02-14 Method for switching the fuel supply to an internal combustion engine from a first fuel to a second fuel

Publications (1)

Publication Number Publication Date
SG181946A1 true SG181946A1 (en) 2012-08-30

Family

ID=43983584

Family Applications (1)

Application Number Title Priority Date Filing Date
SG2012047312A SG181946A1 (en) 2010-02-15 2011-02-14 Method for switching the fuel supply to an internal combustion engine from a first fuel to a second fuel

Country Status (6)

Country Link
EP (1) EP2536936B1 (en)
KR (1) KR101387900B1 (en)
DE (1) DE102010008097A1 (en)
DK (1) DK2536936T3 (en)
SG (1) SG181946A1 (en)
WO (1) WO2011098077A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI126701B (en) 2014-05-09 2017-04-13 Waertsilae Finland Oy A method for controlling a dual fuel engine
DE102016206870B4 (en) * 2016-04-22 2023-09-14 Man Energy Solutions Se Method and control device for operating an internal combustion engine

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH633612A5 (en) * 1979-10-05 1982-12-15 Showa Line Ltd Device for supplying fuel to a diesel engine
DE3039039A1 (en) * 1980-10-16 1982-05-13 Gustav F. 2800 Bremen Holtz METHOD AND SYSTEM FOR OPERATING AN INTERNAL COMBUSTION ENGINE ON BOAT
DE19517537C2 (en) * 1995-05-12 1997-03-27 Ppv Verwaltungs Ag Control arrangement for a device for producing a fuel mixture
DE19828772B4 (en) * 1998-06-27 2005-11-24 Man B & W Diesel A/S Internal combustion engine
DE102004050602B4 (en) * 2004-10-15 2010-05-20 Kangler, Wolfram, Dipl.-Phys. Method for verifying at least one predetermined fuel mixture ratio
US7841317B2 (en) * 2007-04-18 2010-11-30 Williams Rodger K Alternate fuel blending system and associated method
GB2452909B (en) * 2007-09-18 2012-02-22 T Baden Hardstaff Ltd Dual fuel engine control unit
DE102007056819A1 (en) * 2007-11-23 2009-05-28 Thomas Porep - Bernd Mamerow GbR (vertretungsberechtiger Gesellschafter: Thomas Porep, 23775 Großenbrode) Method for switching a marine engine from heavy oil to diesel oil operation
DE102008031597B4 (en) * 2008-07-03 2021-10-07 Man Energy Solutions Se Switchable multi-fuel engine and method for switching fuel in such a multi-fuel engine

Also Published As

Publication number Publication date
KR20120135899A (en) 2012-12-17
KR101387900B1 (en) 2014-04-21
DK2536936T3 (en) 2016-06-20
EP2536936B1 (en) 2015-05-06
DE102010008097A1 (en) 2011-08-18
WO2011098077A1 (en) 2011-08-18
EP2536936A1 (en) 2012-12-26

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