EP2697500B1 - Dispositif et procédé de régulation de la température du carburant dans au moins un injecteur de carburant - Google Patents

Dispositif et procédé de régulation de la température du carburant dans au moins un injecteur de carburant Download PDF

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Publication number
EP2697500B1
EP2697500B1 EP12720921.1A EP12720921A EP2697500B1 EP 2697500 B1 EP2697500 B1 EP 2697500B1 EP 12720921 A EP12720921 A EP 12720921A EP 2697500 B1 EP2697500 B1 EP 2697500B1
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EP
European Patent Office
Prior art keywords
fuel
temperature regulation
fuel injection
engine
injection system
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.)
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Application number
EP12720921.1A
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German (de)
English (en)
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EP2697500A2 (fr
Inventor
David Jay
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Wartsila Finland Oy
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Wartsila Finland Oy
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Publication of EP2697500A2 publication Critical patent/EP2697500A2/fr
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Classifications

    • 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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating means
    • F02M53/06—Injectors with heating, cooling, or thermally-insulating means with fuel-heating means, e.g. for vaporising
    • 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
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/16—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor characterised by the distributor being fed from a constant pressure source, e.g. accumulator or constant pressure positive displacement pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/14—Indicating devices; Other safety devices
    • F01P11/20—Indicating devices; Other safety devices concerning atmospheric freezing conditions, e.g. automatically draining or heating during frosty weather
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/12—Arrangements for cooling other engine or machine parts
    • F01P3/16—Arrangements for cooling other engine or machine parts for cooling fuel injectors or sparking-plugs
    • 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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • 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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating means
    • 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
    • F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
    • F02M53/04—Injectors with heating, cooling, or thermally-insulating means
    • F02M53/043—Injectors with heating, cooling, or thermally-insulating means with cooling means other than air cooling
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/0275—Arrangement of common rails
    • F02M63/0285—Arrangement of common rails having more than one common rail
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/40—Fuel-injection apparatus with fuel accumulators, e.g. a fuel injector having an integrated fuel accumulator
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure

Definitions

  • the present invention relates to a fuel injection system comprising a fuel injector having a fuel admission section arranged to controllably introduce fuel from the fuel injector, a pressure accumulator in the fuel injector arranged in flow connection with the admission section and a fuel inlet arranged in flow connection with the pressure accumulator, which fuel injection system is provided with at least one heat exchanger system.
  • the present invention relates also to an arrangement for regulating temperature of at least one fuel injector in a cylinder head of an internal combustion engine, the arrangement comprising a temperature regulation fluid flow circuit provided with a heat exchanger system in which the temperature regulation fluid is in heat transfer connection with the at least one fuel injector.
  • the present invention relates also to a method of regulating temperature of at least one fuel injector in a cylinder head of an internal combustion engine in which method a temperature regulation fluid is arranged to flow in heat exchange connection with the at least one fuel injector.
  • Internal combustion engines are generally provided with fuel injection systems in which the pressurizing of the fuel and the control of injection are separated.
  • an accumulator volume is used as storage of pressurized fuel the admission of which into a combustion chamber is accomplished by means of a valve needle in the fuel injector nozzle.
  • These systems are commonly known as common rail fuel injection systems. Such a system is described for example in WO 2009147291 .
  • LFO Light fuel oil
  • MDO marine diesel oil
  • HFO Heavy fuel oil
  • HFO Heavy fuel oil
  • HFO is typically used as a fuel in large engines i.e. such engines in which power more than 150kW per cylinder is created.
  • Heavy fuel oil is also susceptible to wide changes in viscosity when changing the temperature, from near solid state at room temperature (typically 20 °C) to liquid at 120 °C.
  • Biofuels are gaining increased attention, driven by factors such as oil price, the need for increased energy security, and concern over greenhouse gas emissions from fossil fuels. Also (municipal) waste handling opens possibilities in energy production.
  • vegetable oils is of interest, both as an additive in LFO or as crude straight liquid bio fuel (LBF).
  • LFO crude straight liquid bio fuel
  • DE 10154455 A1 discloses a dual fuel system for diesel engine.
  • a first fuel tank contains diesel oil and the second fuel tank contains a biological fuel.
  • Each tank feeds a fuel line with a filter and a high-pressure fuel pump supplying fuel to the injectors.
  • the fuel system for the biological fuel is surrounded by a heating jacket, which may be filled with engine cooling water.
  • a control circuit is connected to the injector system to regulate switchover from the diesel oil to the biological fuel and void a volume of fuel from the injector system when the engine is being shut down.
  • WO 2005024225 A1 discloses a heating element in each injection valve and is placed directly in front of the injection valve in the injection line.
  • the heating element is provided in the form of an electric heating spiral that is oriented coaxial to the axial direction of the injection line.
  • DE 10341708 A1 discloses an internal combustion reciprocating piston engine suitable for heavy oil running. There is a common rail supplying fuel under pressure to injection valves. A heating element is installed in the fuel rail and centrally located. The heating element may be hot steam operated or may be electrically operated.
  • US 2002129779 A1 discloses a cylinder head for a liquid-cooled internal combustion engine, with a cooling chamber configuration which is divided by an intermediate deck into a lower cooling chamber, and an upper cooling chamber adjoining the lower cooling chamber in the direction of the cylinder axis, where lower and upper cooling chamber communicate with each other via at least one flow opening.
  • a pipe for a fuel injector may be arranged in connection with the flow opening arranging an annular passage between the opening and the pipe.
  • an object of the invention is to provide a fuel injection system for a piston engine which operates better in various operation conditions of the engine.
  • lower end relating to a fuel injector means the end of an elongated injector at which at least one injection opening is located and "upper end” relating to a fuel injector means an end opposite to the lower end.
  • lower means the side of the injector being closer to the end of an elongated injector at which at least one injection opening is located and the term “upper” the side opposite to the lower side. This applies regardless of the actual position, alignment or orientation of the fuel injector.
  • a fuel injection system comprising a fuel injector having a fuel admission section arranged to controllably introduce fuel from the fuel injector, a pressure accumulator in the fuel injector arranged in flow connection with the admission section and a fuel inlet arranged in flow connection with the pressure accumulator, which fuel injection system is provided with at least one heat exchanger system. It is characteristic to the invention that the at least one heat exchanger system arranged to effect on the pressure accumulator of the fuel injection system from outside thereof.
  • the pressure accumulator is arranged at the upper end of the fuel injector and the heat exchanger system is arranged to effect on the upper end.
  • the heat exchanger system comprises a jacket arranged on the upper end of the fuel injector, and that the jacket is provided with a temperature regulation fluid space and at least one inlet and at least one outlet opening into the temperature regulation fluid space.
  • the heat exchange system comprises at least two separate jackets, lower and upper, in the longitudinal axis of the injector arranged to surround the pressure accumulator.
  • the upper jacket is at a location of the injector where it will be outside the cylinder head when being installed into the cylinder head and the lower jacket is in the cylinder head.
  • the pressure accumulator is arranged in flow connection with the fuel admission section at a upper end thereof and at least one heat exchanger system arranged to effect at least on the pressure accumulator at a lower end thereof.
  • the at least one heat exchanger system is integrated in connection with the pressure accumulator structure.
  • the fuel injection system is provided with two separate, independently controllable heat exchanger systems.
  • a fuel injection system comprising an arrangement for regulating fuel temperature in at least one fuel injector in a cylinder head of an internal combustion engine the arrangement comprising a temperature regulation fluid flow circuit provided with a heat exchanger system in which the temperature regulation fluid is in heat transfer connection with the at least one fuel injector. It is characteristic to the invention that the temperature regulation fluid flow circuit is provided heater systemoperable independent from the running of the engine.
  • the temperature regulation fluid circuit is a separable and/or independently operable section of the fluid circuit of the engine.
  • the temperature regulation fluid flow circuit is provided with two separate, independently controllable heat exchanger systems.
  • the temperature regulation fluid circuit is in connection with lubrication oil circuit of the engine.
  • the temperature regulation fluid circuit is in connection with cooling fluid system of the engine.
  • the arrangement comprises a control system which is set to maintain the arrangement for regulating temperature operating while the engine is in stand-by-mode.
  • the temperature regulation fluid flow circuit is provided with two separate heat exchanger system, in which one of the heat exchanger systems has cooling fluid of the engine as the temperature regulation fluid and the other heat exchanger system has lubrication oil of the engine as the temperature regulation fluid.
  • the temperature regulation fluid flow circuit is provided with two separate heat exchanger system, in which both heat exchanger systems haves lubrication oil of the engine as the temperature regulation fluid.
  • the temperature regulation fluid flow circuit is provided with two separate heat exchanger system, in which both heat exchanger systems haves cooling fluid of the engine as the temperature regulation fluid.
  • Objects of the invention are also met by a method of regulating temperature of at least one fuel injector in a cylinder head of an internal combustion engine in which method a temperature regulation fluid is arranged to flow in heat exchange connection with the at least one fuel injector, characterized in that the temperature regulation fluid flow is operated independent from the running of the engine.
  • the temperature regulation fluid flow is operated while the engine is in stand-by mode.
  • the temperature regulation fluid flow is operated by circulating fuel in heat exchange connection with the at least one fuel injector.
  • the temperature regulation fluid flow circuit is operated by circulating lubrication oil in heat exchange connection with the at least one fuel injector.
  • the temperature regulation fluid flow is operated by circulating cooling water in heat exchange connection with the at least one fuel injector.
  • FIG. 1 shows schematically a fuel injection system 10 installed in a cylinder head 12 in a piston engine partially bordering a combustion chamber 14 of the engine.
  • the fuel injection system comprises a fuel injector 16 in which a fuel admission section 18 is arranged to controllably introduce fuel from the fuel injection to the combustion chamber 14.
  • the fuel admission section 18 includes at least a metering device 20, such as a needle unit and a control system 22 controlling the operational state of the metering device 20.
  • the fuel injector further comprises a pressure accumulator 24 which is at the upper end of the injector in flow communication with the fuel admission section 18.
  • the fuel injection system also comprises a fuel inlet 26 which is connected to a source of pressurized fuel 28, such as a so called common rail system.
  • the fuel injection system 10 is provided with at least one heat exchanger system 100, which is arranged to effect on the pressure accumulator 24 of the fuel injection system from outside thereof.
  • the at least one heat exchanger system 100 is arranged to transfer heat through the outer wall 31 of the accumulator 24 in to the fuel therein. This provides an operation which does not directly affect on the flow channel of the fuel.
  • the heat exchanger system 100 may be used to maintain the fuel in the injector at a temperature at which the viscosity is at acceptable level, i.e. low enough.
  • the fuel injection system is particularly advantageous for biomass based fuel such as vegetable oil, olive oil, rapeseed oil, palm oil, animal fats etc. containing fuels.
  • the injector 16 comprises an elongated body, which may be constructed of several parts, even if not shown here.
  • the pressure accumulator 24 is arranged at the upper end of the fuel injector 16 and the fuel admission section 18 at the lower end, opposite to the upper end.
  • the heat exchanger system is arranged effect the upper end of the injector 16, however the applied heat also effects on the fuel admission section 18.
  • the heat exchanger system 100 comprises a jacket 102 or alike at the upper end of the fuel injector 16.
  • the jacket is provided with a temperature regulation fluid space 104 bordered by the fuel injector and the jacket.
  • the jacket 102 at the upper end of the accumulator 24 is provided with an inlet 106 and an outlet 108 in order to provide a circulation of temperature regulation fluid through the temperature regulation fluid space 104. This way the temperature regulation of the fuel injector, and particularly the fuel contained in the accumulator, may be maintained.
  • the cylinder head 12 is arranged to operate as a second jacket 110 surrounding the fuel injector 16.
  • Cylinder head is provided with an annular groove extending circumferentially around the fuel injector 16 and being provided with sealings 30.
  • the jacket is provided with a lower temperature regulation fluid space 104' bordered by the fuel injector 16 and the jacket formed by the cylinder head 12.
  • the second jacket 110 at the lower end of the accumulator 24 is provided with an inlet 106' and an outlet 108' in order to provide a circulation of temperature regulation fluid through the temperature regulation fluid space 104'.
  • the lower temperature regulation fluid space is bigger than the fluid space 104 in the jacket.
  • the arrangement may additionally be provided with an intermediate sleeve 17 through which heat may be conducted but which provides an additional wall for preventing the escape of the temperature regulation fluid when disassembling the injector 16.
  • temperature regulation fluid is preferably the lubrication oil of the engine.
  • the upper and the lower spaces may be connected to separate, independently controllable temperature regulation fluid circuit.
  • temperature regulation fluids are preferably the lubrication oil of the engine and the cooling fluid of the engine.
  • FIG 2 there is shown an embodiment of the invention in which the fuel injector 16 as outlined in figure 1 has been adapted for use in an internal combustion engine.
  • Figure 2 shown a piston engine 50 comprising a valve cover 50.1, cylinder head 12, engine block 50.2 and oil sump 50.3.
  • the fuel injector 16 has been arranged into the cylinder head 12 of the engine 50.
  • the engine is provided with an arrangement 52 for regulating temperature of at least one fuel injector 16 in a cylinder head 12 of an internal combustion engine 50.
  • the arrangement comprises a temperature regulation fluid flow circuit 54.
  • the temperature regulation fluid flow circuit 54 is provided with a heat exchanger system 100 in which the temperature regulation fluid is in heat transfer connection with the fuel injector 16.
  • the temperature regulation fluid is lubrication oil of the engine 50.
  • the temperature regulation fluid flow circuit 54 connected to the lubrication system 50.4 of the engine 50.
  • the lubrication system of the engine may be of a type known as such.
  • the lubrication oil is controlled to flow through the temperature regulation fluid flow circuit 54 and particularly through the heat exchanger system 100.
  • the circuit 54 is provided with a heater system 56 by means of which heat may be brought to the temperature regulation fluid. This way the temperature of fuel oil in the accumulator 24 remains at adequate range even if the upper end of the injector 16 i.e. the pressure accumulator 24 protrudes out from the cylinder head 12.
  • the engine is set to a stand-by mode at which the engine is not running but it is maintained at a state from which a quick starting is possible.
  • the electronics of the engine is operating during the stand-by mode.
  • the heater system 56 of the temperature regulation fluid flow circuit 54 is maintained operating independent from the running of the engine 50.
  • the heater system 56 is shown as external system, but it may also be integrated into the engine 50.
  • the temperature regulation fluid is lube oil, thus the external heater system 56 is connected to the lubrication system 50.4 of the engine 50.
  • the temperature regulation fluid circuit is a separable and/or independently operable section of the lubrication oil circuit 50.4 of the engine, thus the external heater system 56 is provided with a pumping means 58 which may be operated even if the engine is at stand-by mode.
  • Stand-by mode may be used in engines for example in connection with ships and power plants, particularly in emergency power plants.
  • There may be valves 55 arranged into the oil circuit make sure that during the stand-by mode the circulation through other part of the engine are prevented or minimize.
  • the circuit 54 is in connection with each of the injector.
  • the heat exchanger system 100 of each injector system is independently controllable.
  • the arrangement 52 is provided with a control system 60 which is set to maintain the arrangement 52 for regulating temperature operating while the engine is at stand-by mode.
  • the control system is provided with a probe 61 which is arranged in vicinity of the fuel injector 16
  • the temperature of the at least one fuel injector, and thus the temperature of the fuel therein, arranged in a cylinder head of an internal combustion engine is controlled by arranging a temperature regulation fluid to flow in heat exchange connection with the at least one fuel injector, and the temperature regulation fluid flow is operated independent from the running of the engine so, that the flow in heat exchange connection with the at least one fuel injector may be maintained even when the engine is not running i.e. during the stand-by mode.
  • the temperature regulation fluid flow is operated at least during a predetermined period while the engine is stopped.
  • the temperature regulation fluid flow is operated until the engine is started again.
  • the predetermined time may be even 2-7 days.
  • Preferably temperature regulation fluid flow circuit is operated by circulating lubrication oil in heat exchange connection with the at least one fuel injector.
  • the cylinder head 12 comprises according to an embodiment of the invention a first cavity entity 120 having at least one first inlet section 122 for a first fluid and at least one first outlet section 124 for the first fluid, the at least one first inlet section 122 and at least one first outlet section 124 being in flow connection with each other via the first cavity entity 120 in the cylinder head assembly.
  • the cylinder head assembly further comprises a second cavity entity 110' having at least one second inlet section 106' for a second fluid and at least one second outlet section 108' for the second fluid. The at least one second inlet section 106' and at least one second outlet section 108' being in flow connection with each other via the second cavity entity 110' in the cylinder head assembly.
  • the cylinder head assemble may provide two separate and independently controllable cooling or heat exchanger systems and thus making it possible to control the temperature and temperature distribution in the cylinder head in more precise manner.
  • the cylinder head 12 is provided with a third cavity 130 extending through the cylinder head 12 having inside surface arranged to accommodate an installation of a fuel injector 16 therein. Additionally the second cavity entity 110' is arranged to at least partially open into the third cavity 130. This way the second cavity entity may be arranged to be bordered by the fuel injector 16 after it installation into the third cavity entity.
  • the third cavity entity is arranged for installation of the fuel injector, the second cavity entity is arranged to operate as heat exchange system to effect on the pressure accumulator 24 of the fuel injection system from outside thereof, according to a preferred embodiment by connection to the lubrication system of the engine.
  • the first cavity entity is arranged to operate as conduit for engine cooling medium circuit.
  • the heat exchanger system is arranged to effect on the pressure accumulator of the fuel injection system from outside thereof and is co connected to the temperature regulation fluid flow circuit 54, cf. figure 2 .
  • a combination of a cylinder head 12 and a fuel injection system 10 provides advantageous effects particularly for use of biomass-based liquid fuel.
  • the co-operation of the fuel injector construction and the cylinder head construction the fuel may be maintained at adequate low viscosity i.e. high temperature state at all situations.
  • the second cavity entity to operated as heat exchange system to effect on the pressure accumulator 24 by means of the fuel system of the engine as the temperature regulation fluid circuit.
  • FIG 4 one can see a still further embodiment of the invention in which the cylinder head 12 assembly for an internal combustion engine is substantially similar to that shown in figure 1 except that the heat exchanger system 100 of the fuel injector 16 is different.
  • the fuel injection system 10 is provided with a heat exchanger system 100' integrated in to the fuel injector 16, which is arranged to effect on the pressure accumulator 24 of the fuel injection system from outside thereof.
  • the heat exchanger system 100' comprises borings 101 which are arranged into the outer wall 31 or the accumulator and parallel with the longitudinal axis 16' of the injector 16. There may be several borings arranged around the accumulator 24, even if only some of borings 101 are shown here for clarity reasons.
  • the heat exchanger system 100' is provided with an inlet 106 and an outlet 108 in order to provide a circulation of temperature regulation fluid through the temperature regulation fluid space 104. This way the temperature regulation of the fuel injector, and particularly the fuel contained in the accumulator, may be maintained.
  • a first set of the borings are connected to the inlet 106 and the second set of the borings are connected to the outlet 108. All of the borings belonging to the same set of borings are connected with each other both at their upper and lower ends. The first set and the second of the borings are connected with each other only at the lower part thereof. There is an annular groove 103 arranged in the injector 16 which serves as the connection of the first set and the second of the borings. The upper ends of the borings in a set may also be connected with each other by a partially circumscribing groove 105 or alike.
  • FIG 5 there is shown a still further embodiment of the invention in which the fuel injector 16 as outlined in figure 1 has been adapted for use in an internal combustion engine.
  • Figure 5 shown a piston engine 50 comprising a valve cover 50.1, cylinder head 12, engine block 50.2 and oil sump 50.3.
  • the fuel injector 16 has been arranged into the cylinder head 12 of the engine 50.
  • the engine is provided with an arrangement 52 for regulating temperature of at least one fuel injector 16 in a cylinder head 12 of an internal combustion engine 50.
  • the arrangement comprises a temperature regulation fluid flow circuit 54.
  • the temperature regulation fluid flow circuit 54 is provided with a heat exchanger system 100 in which the temperature regulation fluid is in heat transfer connection with the fuel injector 16.
  • the temperature regulation fluid is lubrication oil of the engine 50.
  • the temperature regulation fluid flow circuit 54 connected to the lubrication system 50.4 of the engine 50.
  • the lubrication system of the engine may be of a type known as such.
  • the operation of the arrangement 52 for regulating temperature corresponds that described in connection with figure 2 .
  • FIG 5 there is shown a second arrangement 52' for regulating temperature of the fuel injector 16 in a cylinder head 12 of an internal combustion engine 50.
  • the arrangement comprises a second temperature regulation fluid flow circuit 54'.
  • the second temperature regulation fluid flow circuit 54 is also provided with a heat exchanger system 100 in which the temperature regulation fluid is in heat transfer connection with the fuel injector 16.
  • the temperature regulation fluid is cooling fluid of the engine 50.
  • the cooling fluid system 50.6 of the engine may be of a type known as such.
  • the cooling fluid is controlled to flow through the temperature regulation fluid flow circuit 54' and particularly through the heat exchanger system 100.
  • the circuit 54' is provided with a heater system 56' by means of which heat may be brought to the temperature regulation fluid when necessary. This way the temperature of fuel oil in the accumulator 24 remains at adequate range making use both the cooling fluid and lubrication oil.
  • the engine is set to a stand-by mode at which the engine is not running but it is maintained at a state from which a quick starting is possible.
  • the electronics of the engine is operating during the stand-by mode.
  • the heater system 56' of the temperature regulation fluid flow circuit 54' may be maintained operating independent from the running of the engine 50.
  • the heater system 56' is shown as external system, but it may also be integrated into the engine 50.
  • the temperature regulation fluid is engine cooling fluid, thus the external heater system 56' is connected to the cooling system 50.6 of the engine 50.
  • the temperature regulation fluid circuit is a separable and/or independently operable section of the cooling fluid system 50.6 of the engine, thus the external heater system 56' is provided with a pumping means 58' which may be operated even if the engine is at stand-by mode. Stand-by mode may be used in engines for example in connection ships and power plants, particularly in emergency power plants.
  • the arrangement 52' is connected to the control system 60 which is set to maintain the arrangement 52' for regulating temperature operating while the engine is at stand-by mode.
  • the control system is provided with a probe 61 which is arranged in vicinity of the fuel injector 16
  • Method of regulating temperature of at least one fuel injector in a cylinder head of an internal combustion engine is according to an embodiment of the invention practiced so that the temperature regulation fluid flow is operated by circulating lubrication oil in heat exchange connection with the at least one fuel injector and / or by circulating cooling water in heat exchange connection with the at least one fuel injector

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • Fuel-Injection Apparatus (AREA)

Claims (15)

  1. Système d'injection de carburant (10) comprenant un injecteur de carburant (16) ayant une section d'admission de carburant (18) configurée pour introduire du carburant de façon contrôlable depuis l'injecteur de carburant, un accumulateur de pression (24) dans l'injecteur de carburant disposé en raccordement d'écoulement avec la section d'admission et une entrée de carburant (26) disposée en raccordement d'écoulement avec l'accumulateur de pression, lequel système d'injection de carburant est muni d'au moins un système échangeur de chaleur (100), caractérisé en ce que au moins un système échangeur de chaleur (100) est configuré pour agir sur l'accumulateur de pression (24) du système d'injection de carburant depuis l'extérieur de celui-ci.
  2. Système d'injection de carburant selon la revendication 1, caractérisé en ce que l'accumulateur de pression (24) est disposé à l'extrémité supérieure de l'injecteur de carburant et le système échangeur de chaleur (100) est configuré pour agir sur l'extrémité supérieure.
  3. Système d'injection de carburant selon la revendication 2, caractérisé en ce que le système échangeur de chaleur (100) comprend une enveloppe (102) disposée sur l'extrémité supérieure de l'injecteur de carburant et en ce que l'enveloppe est munie d'un espace de liquide de régulation de température (104) et au moins une ouverture d'entrée (106) et au moins une ouverture de sortie (108) dans l'espace de liquide de régulation de température.
  4. Système d'injection de carburant selon la revendication 3, caractérisée en ce que le système échangeur de chaleur comprend au moins deux enveloppes séparées (102, 110) dans l'axe longitudinal de l'injecteur disposées pour entourer l'accumulateur de pression.
  5. Système d'injection de carburant selon la revendication 1 ou 2, caractérisé en ce qu'au moins un système échangeur de chaleur (100') est intégré en rapport avec la structure de l'accumulateur de pression.
  6. Système d'injection de carburant selon la revendication 1 ou 2, caractérisé en ce que le système d'injection de carburant est muni de deux systèmes échangeurs de chaleur (56, 56'), pouvant être commandés de façon indépendante.
  7. Système d'injection de carburant selon l'une quelconque des revendications précédentes 1-6, caractérisé en ce que l'accumulateur de pression est disposé en raccordement d'écoulement avec la section d'admission de carburant à une extrémité supérieure de celle-ci et au moins un système échangeur de chaleur (100, 100') configuré pour agir sur l'accumulateur de pression à une extrémité inférieure de celui-ci.
  8. Système d'injection de carburant (19) selon l'une quelconque des revendications précédentes 1-7, caractérisé en ce que le système d'injection de carburant comprend une structure pour réguler la température du carburant dans au moins un injecteur de carburant (16) dans une culasse d'un moteur à combustion interne (50), la structure comprenant un circuit d'écoulement de liquide de régulation de température (54) muni d'au moins un système échangeur de chaleur (100, 100') dans lequel le liquide de régulation de température est en raccordement de transfert de chaleur avec au moins un injecteur de carburant (16) et le circuit d'écoulement de liquide de régulation de température (54) est muni d'un système de chauffage (56) pouvant être actionné indépendamment du fonctionnement du moteur.
  9. Système d'injection de carburant selon la revendication 8, caractérisé en ce que le circuit d'écoulement de liquide de régulation de température (54) est muni de deux systèmes échangeurs de chaleur (100, 100') séparés, contrôlables de façon indépendante
  10. Système d'injection de carburant selon la revendication 8, caractérisé en ce que le circuit d'écoulement de liquide de régulation de température (54) est en raccord avec le circuit d'huile de lubrification (50.4) du moteur.
  11. Système d'injection de carburant selon la revendication 8 ou 10, caractérisé en ce que le circuit d'écoulement de liquide de régulation de température est une section séparable et/ou actionnable de façon indépendante du circuit de liquide du moteur.
  12. Système d'injection de carburant selon la revendication 8, caractérisé en ce que le circuit d'écoulement de liquide de régulation de température (54) est en raccord avec le système de liquide de refroidissement (50.6) du moteur.
  13. Système d'injection de carburant selon l'une quelconque des revendications précédentes 8-12, caractérisé en ce que la structure comprend un système de contrôle (60) qui est réglé pour maintenir la structure en fonctionnement pour réguler la température du carburant pendant que le moteur est en mode de réserve.
  14. Méthode pour réguler la température du carburant d'un système d'injection de carburant comprenant au moins un injecteur de carburant (16) ayant une section d'admission de carburant (18), configuré pour introduire de façon contrôlable du carburant depuis l'injecteur de carburant, un accumulateur de pression (24) dans l'injecteur de carburant disposé en raccordement d'écoulement avec la section d'admission et une entrée de carburant (26) disposée en raccordement d'écoulement avec l'accumulateur de pression, lequel système d'injection de carburant est muni d' au moins un système échangeur de chaleur (100) dans une culasse d'un moteur à combustion interne, méthode dans laquelle un liquide de régulation de température est disposé pour s'écouler en raccord d'échange de chaleur avec au moins un injecteur de carburant, et lequel écoulement de liquide de régulation de température est actionné indépendamment du fonctionnement du moteur, caractérisée en ce que le liquide de régulation de température est disposé pour s'écouler en raccord d'échange de chaleur avec l'accumulateur de pression (24) du système d'injection de carburant depuis l'extérieur de celui-ci.
  15. Méthode selon la revendication 14, caractérisée en ce que le circuit d'écoulement de liquide de régulation de température est actionné en faisant circuler de l'huile de lubrification ou de l'eau de refroidissement en raccord d'échange de chaleur avec au moins un injecteur de carburant.
EP12720921.1A 2011-04-12 2012-03-20 Dispositif et procédé de régulation de la température du carburant dans au moins un injecteur de carburant Active EP2697500B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20115343A FI123449B (fi) 2011-04-12 2011-04-12 Järjestely ja menetelmä polttoaineen lämpötilan säätämiseksi vähintään yhdessä polttoaineen ruiskutussuuttimessa
PCT/FI2012/050266 WO2012140317A2 (fr) 2011-04-12 2012-03-20 Dispositif et procédé de régulation de la température du carburant dans au moins un injecteur de carburant

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EP2697500A2 EP2697500A2 (fr) 2014-02-19
EP2697500B1 true EP2697500B1 (fr) 2015-06-17

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EP12720921.1A Active EP2697500B1 (fr) 2011-04-12 2012-03-20 Dispositif et procédé de régulation de la température du carburant dans au moins un injecteur de carburant

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EP (1) EP2697500B1 (fr)
KR (1) KR101757514B1 (fr)
CN (1) CN103518057B (fr)
FI (1) FI123449B (fr)
WO (1) WO2012140317A2 (fr)

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DE102012008634B4 (de) * 2012-04-25 2017-08-24 L'orange Gmbh Anordnung zum Erwärmen eines Druckspeichers eines Injektors
CN105840289A (zh) * 2016-03-24 2016-08-10 中国北方发动机研究所(天津) 一种共轨喷油器冷却系统
CN106121886A (zh) * 2016-08-30 2016-11-16 上海交通大学 一种缸盖上喷油器快速温控系统

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CH432934A (de) * 1965-07-10 1967-03-31 Maschf Augsburg Nuernberg Ag Einrichtung zum Betrieb einer Brennkraftmaschine mit Kraftstoff höherer Viskosität
CH667698A5 (de) * 1985-05-03 1988-10-31 Sulzer Ag Einrichtung zum betrieb einer kolbenbrennkraftmaschine mit einem brennstoff relativ hoher viskositaet.
JP2000130284A (ja) * 1998-10-28 2000-05-09 Nissan Motor Co Ltd ディーゼルエンジンの燃料噴射装置
DE19949812A1 (de) * 1999-10-15 2001-04-19 Daimler Chrysler Ag Verfahren zum Betreiben einer Common-Rail-Brennkraftmaschine
JP2002276315A (ja) 2001-03-19 2002-09-25 Yamaha Motor Co Ltd 内燃機関の可変動弁装置
DE10154455A1 (de) 2001-11-06 2003-05-15 Dietmar Gentsch Konstruktion der Treibstoffzufuhr für den DuoDiesel DDI
DE10340159A1 (de) 2003-09-01 2005-04-07 Audi Ag Kraftstoff-Hochdruckeinspritzsystem als Common-Rail Einspritzsystem
DE10341708B4 (de) 2003-09-10 2012-05-03 Man Diesel & Turbo Se Hubkolbenbrennkraftmaschine
JP2005273492A (ja) * 2004-03-23 2005-10-06 Mitsubishi Heavy Ind Ltd 副室式内燃機関
DE102007016418A1 (de) * 2007-04-05 2008-10-09 Man Diesel Se Temperierung der Schaltventileinheit in Einspritzsystemen
DE102008013129A1 (de) * 2008-03-07 2009-09-24 Alois Dotzer Dieselmotorisch betriebene Brennkraftmaschine
FI120886B (fi) 2008-06-05 2010-04-15 Waertsilae Finland Oy Polttoaineen ruiskutusjärjestelmä mäntämoottorille
US8342425B2 (en) 2008-12-03 2013-01-01 Continental Automotive Systems Us, Inc. Multi-point low pressure inductively heated fuel injector with heat exchanger
EP2426344B1 (fr) * 2010-09-07 2015-02-25 Caterpillar Motoren GmbH & Co. KG Système de chauffage pour moteur à combustion interne

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Publication number Publication date
KR101757514B1 (ko) 2017-07-12
WO2012140317A3 (fr) 2012-12-06
FI20115343A0 (fi) 2011-04-12
WO2012140317A2 (fr) 2012-10-18
FI20115343A (fi) 2012-10-13
CN103518057A (zh) 2014-01-15
CN103518057B (zh) 2015-10-14
FI123449B (fi) 2013-05-15
KR20140022414A (ko) 2014-02-24
EP2697500A2 (fr) 2014-02-19
FI20115343L (fi) 2012-10-13

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