FI124743B - Fuel Injection Arrangement - Google Patents

Fuel Injection Arrangement Download PDF

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Publication number
FI124743B
FI124743B FI20126081A FI20126081A FI124743B FI 124743 B FI124743 B FI 124743B FI 20126081 A FI20126081 A FI 20126081A FI 20126081 A FI20126081 A FI 20126081A FI 124743 B FI124743 B FI 124743B
Authority
FI
Finland
Prior art keywords
fuel injection
fuel
valve
injection valve
pressure
Prior art date
Application number
FI20126081A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI20126081A (en
Inventor
Anton Wintersteller
Mikael Troberg
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 FI20126081A priority Critical patent/FI124743B/en
Priority to CN201380051414.0A priority patent/CN104755742B/en
Priority to PCT/FI2013/050983 priority patent/WO2014060646A1/en
Priority to KR1020157011572A priority patent/KR102034334B1/en
Priority to EP13792715.8A priority patent/EP2917554B1/en
Publication of FI20126081A publication Critical patent/FI20126081A/en
Application granted granted Critical
Publication of FI124743B publication Critical patent/FI124743B/en

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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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • F02M45/086—Having more than one injection-valve controlling discharge orifices
    • 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/44—Valves, e.g. injectors, with valve bodies arranged side-by-side

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

Description

Fuel injection arrangement Technical field of the inventionFuel injection arrangement Technical field of the invention

The present invention relates to a fuel injection arrangement for injecting liquid fuel into a cylinder of a piston engine in accordance with the preamble of claim 1.The present invention relates to a fuel injection arrangement for injecting a liquid fuel into a cylinder of a piston engine in accordance with the preamble of claim 1.

Background of the inventionBackground of the invention

In large internal combustion engines, such as in ship or power plant engines, each cylinder of the engine can be provided with more than one fuel injector. For instance, dual-fuel engines can be provided with one injector for the operation on liquid fuel and with another injector for injecting a small amount of liquid pilot fuel when the engine is operated on a gaseous fuel. Also engines using only liquid fuel can be provided with different injectors for different loads. A problem concerning especially dual-fuel engines is that the amount of fuel injected through one of the fuel injectors is very small. Therefore, these engines are usually provided with conventional fuel injection pumps for supplying the fuel at a high pressure to the fuel injectors when the engine is operated on a liquid fuel, and with a common rail system for supplying the liquid fuel to the pilot fuel injectors when the engine is operated on a gaseous fuel. This kind of system enables very small injection amounts and makes it possible to meet even very stringent emission regulations. However, two separate fuel injection systems increase the complexity of the engine.In large internal combustion engines such as ship or power plant engines, each cylinder of the engine can be provided with more than one fuel injector. For instance, dual-fuel engines can be provided with one injector for operating on a liquid fuel and with another injector for injecting a small amount of liquid pilot fuel when the engine is operated on a gaseous fuel. Also engines using only liquid fuel can be provided with different injectors for different loads. The problem regarding especially dual-fuel engines is that the amount of fuel injected through one of the fuel injectors is very small. Therefore, these engines are usually provided with conventional fuel injection pumps for supplying fuel at high pressure to the fuel injectors when the engine is operated on a liquid fuel and with a common rail system for supplying liquid fuel to the pilot fuel injectors when the engine is operated on a gaseous fuel. This kind of system enables very small injection amounts and makes it possible to meet even very stringent emission regulations. However, two separate fuel injection systems increase the complexity of the engine.

Summary of the inventionSummary of the invention

The object of the present invention is to provide an improved fuel injection arrangement for injecting liquid fuel into a cylinder of a piston engine. The characterizing features of the arrangement according to the invention are given in the characterizing part of claim 1. A fuel injection arrangement according to the invention comprises a first fuel injection valve, a second fuel injection valve, a pressure medium source for sup plying fuel to the first fuel injection valve and to the second fuel injection valve, a selector valve for selectively allowing flow from the pressure medium source to the first fuel injection valve or to the second fuel injection valve, a fuel supply duct for connecting the pressure medium source to the selector valve, a first fuel duct for connecting the first fuel injection valve to the selector valve, and a second fuel duct for connecting the second fuel injection valve to the selector valve. The arrangement further comprises means for regulating pressure in the second fuel duct between the selector valve and the second fuel injection valve.The object of the present invention is to provide an improved fuel injection arrangement for injecting liquid fuel into a cylinder of a piston engine. 1. A fuel injection arrangement according to the invention comprises a first fuel injection valve, a second fuel injection valve, a pressure medium source for sup plying fuel to the first fuel injection valve and the second fuel injection valve, a selector valve for selectively allowing flow from the pressure medium source to the first fuel injection valve, the fuel supply duct for connecting the pressure medium source to the selector valve, the first fuel duct for connecting the first fuel injection valve to the selector valve, and the second fuel duct for connecting the second fuel injection valve to the selector valve. The arrangement further comprises means for regulating the pressure in the second fuel duct between the selector valve and the second fuel injection valve.

With the arrangement according to the invention, the same source of pressurized fuel can be used for supplying fuel to different fuel injectors that are used for injecting different amounts of fuel at different pressures. The need for separate fuel supply systems for the different fuel injection valves can thus be eliminated, which helps to make the fuel injection system less complicated and expensive.With the arrangement according to the invention, the same source of Pressurized fuel can be used for supplying fuel to different fuel injectors that are used for injecting different amounts of fuel at different pressures. The need for separate fuel supply systems for different fuel injection valves can thus be eliminated which helps to make the fuel injection system less Complicated and expensive.

The pressure medium source can be a high-pressure fuel injection pump. The second fuel injection valve can be, for instance, a pilot fuel valve, which is configured for injecting smaller amounts of fuel than the first fuel injection valve.The pressure medium source can be a high pressure fuel injection pump. The second fuel injection valve can be, for instance, a pilot fuel valve that is configured for injecting smaller amounts of fuel than the first fuel injection valve.

According to an embodiment of the invention, the arrangement comprises means for controlling opening and/or closing timing of the second fuel injection valve. The means can be for example a control valve. This enables accurate control of the timing of the second fuel injection valve and of the amount of fuel injected through the second fuel injection valve.According to the invention, the arrangement comprises means for controlling the opening and / or closing of the second fuel injection valve. The means can be for example a control valve. This enables accurate control of the timing of the second fuel injection valve and the amount of fuel injected through the second fuel injection valve.

According to an embodiment of the invention, the arrangement comprises an overflow duct branching from the second fuel duct and a throttle that is arranged in the overflow duct for regulating the pressure in the second fuel duct. Instead of a throttle, a pressure reducing valve can be used for regulating the pressure in the second fuel duct.According to the invention, the arrangement comprises an overflow duct branching from the second fuel duct and a throttle that is arranged in the overflow duct for regulating the pressure in the second fuel duct. Instead of a throttle, a pressure reducing valve can be used to regulate the pressure in the second fuel duct.

Brief description of the drawingsBrief description of the drawings

Embodiments of the invention are described below in more detail with reference to the accompanying drawings, in whichEmbodiments of the invention are described below in more detail with reference to the accompanying drawings, in which

Fig. 1 shows a schematic view of a fuel injection arrangement according to an embodiment of the invention.Fig. 1 shows a schematic view of a fuel injection arrangement according to an embodiment of the invention.

Description of embodiments of the inventionDescription of the embodiments of the invention

The fuel injection arrangement according to the invention is suitable particularly for large internal combustion engines, such as main or auxiliary engines of ships, engines of offshore applications or engines that are used at power plants for producing electricity. The invention is beneficial especially in dualfuel engines, which can be operated both on liquid and gaseous fuel, and in which a small amount of liquid pilot fuel is used when the engine is operated in a gas mode. However, the invention can also be utilized in other engines, in which two or more fuel injectors are used for each cylinder.The fuel injection arrangement according to the invention is particularly suitable for large internal combustion engines, such as main or auxiliary engines for ships, engines for offshore applications or engines that are used for power plants for generating electricity. The invention is advantageous especially in dual-fuel engines that can be operated on both liquid and gaseous fuel and in which a small amount of liquid pilot fuel is used when the engine is operated in a gas mode. However, the invention can also be utilized in other engines, in which two or more fuel injectors are used for each cylinder.

Figure 1 shows a schematic view of a fuel injection arrangement according to an embodiment of the invention. The arrangement comprises a first fuel injection valve 1 and a second fuel injection valve 2, which are arranged to inject liquid fuel into a cylinder 11 of a piston engine. The second fuel injection valve 2 is configured for injecting smaller amounts of fuel than the first fuel injection valve 1. In the embodiment of the figures, the second fuel injection valve 2 is a pilot fuel valve, which is used in a dual-fuel engine for injecting a small amount of liquid fuel into the cylinder 11. Burning liquid fuel initiates combustion of the gas-air mixture in the cylinder 11. The second fuel injection valve 2 could also be used in other than dual-fuel engines for injecting fuel at low loads. Each cylinder 11 of the engine is provided with a similar fuel injection arrangement. In the embodiment of the figure, the fuel injection valves 1,2 are part of a fuel injection unit 12, which is used for injecting the fuel directly into the combustion chamber of the cylinder 11. However, the fuel injection valves 1,2 do not need to be arranged in a common fuel injection unit, but they can also be separate and one or both of the fuel injection valves 1,2 could also be used for injecting fuel into a pre-combustion chamber. Both fuel injection valves 1, 2 are of a conventional type. Each fuel injection valve 1, 2 comprises a nozzle 1a, 2a, which is arranged at the end of the fuel injection valve 1, 2, and a fuel gallery 1d, 2d, which is arranged inside the body of the fuel injection valve 1, 2. The fuel is stored in the fuel gallery 1d, 2d before being injected into the cylinder 11 through the nozzle 1a, 2a. Each fuel injection valve 1,2 is also provided with a valve needle 1b, 2b for opening and closing flow communication between the fuel gallery 1d, 2d and the nozzle 1a, 2a. The valve needle 1b, 2b is kept in a closed position by a spring 1c, 2c. Many other constructions of the fuel injection valves 1, 2 are possible instead of the construction shown in the figure. For instance, the valve needles 1 b, 2b could be coaxial and both fuel injection valves 1, 2 could utilize a common nozzle part having separate nozzle holes for each of the fuel injection valves 1,2.Figure 1 shows a schematic view of a fuel injection arrangement according to an embodiment of the invention. The arrangement comprises a first fuel injection valve 1 and a second fuel injection valve 2 arranged to inject liquid fuel into a cylinder 11 of a piston engine. The second fuel injection valve 2 is configured for injecting smaller amounts of fuel than the first fuel injection valve 1. In the second fuel injection valve 2 is a pilot fuel valve that is used in a dual-fuel engine for injecting a small amount of liquid fuel into the cylinder 11. Burning the liquid fuel initiators combustion of the gas-air mixture in the cylinder 11. The second fuel injection valve 2 could also be used in other than dual-fuel engines for injecting fuel at low loads. Each cylinder 11 of the engine is provided with a similar fuel injection arrangement. In the embodiment of the figure, the fuel injection valves 1,2 are part of a fuel injection unit 12 which is used for injecting the fuel directly into the combustion chamber of the cylinder 11. However, the fuel injection valves 1,2 do not need to be installed in a common fuel injection unit, but they can also be separate and one or both of the fuel injection valves 1,2 could also be used for injecting fuel into a pre-combustion chamber. Both fuel injection valves 1, 2 are of a conventional type. Each fuel injection valve 1, 2 comprises a nozzle 1a, 2a, which is arranged at the end of the fuel injection valve 1, 2, and a fuel gallery 1d, 2d, which is arranged inside the body of the fuel injection valve 1, 2. The fuel is stored in the fuel gallery 1d, 2d before being injected into the cylinder 11 through the nozzle 1a, 2a. Each fuel injection valve 1,2 is also provided with a valve needle 1b, 2b for opening and closing flow communication between the fuel gallery 1d, 2d and the nozzle 1a, 2a. The valve needle 1b, 2b is kept in a closed position by a spring 1c, 2c. Many other constructions of the fuel injection valves 1, 2 are possible instead of the construction shown in the figure. For instance, the valve needles 1 b, 2b could be coaxial and both fuel injection valves 1, 2 could utilize a common nozzle part having separate nozzle holes for each of the fuel injection valves 1,2.

Both fuel injection valves 1,2 are connected to a pressure medium source 3, which is in the embodiment of the figure a high-pressure fuel injection pump. The fuel does not need to be supplied to the fuel injection valves 1, 2 directly from the fuel injection pump 3, but it can be pressurized by the pump 3 and stored in a chamber before being supplied to the fuel injection valves 1,2. The pump 3 is a conventional fuel injection pump, which can be adjusted for choosing appropriate fuel injection timing and quantity at different loads. The fuel injection arrangement is provided with a fuel supply duct 5 for delivering the fuel from the fuel injection pump 3 to the fuel injection valves 1,2. Only one of the fuel injection valves 1, 2 is used at a time, and therefore the arrangement is provided with a selector valve 4 for allowing flow from the fuel injection pump 3 either to the first fuel injection valve 1 or to the second fuel injection valve 2. The selector valve 4 is a three-way valve, which is provided with one inlet port 4a and with a first outlet port 4b and a second outlet port 4c. A first fuel duct 6 connects the first outlet port 4b of the selector valve 4 to the first fuel injection valve 1, and a second fuel duct 7 connects the second outlet port 4c to the second fuel injection valve 2. The inlet port 4a of the selector valve 4 is connected to the fuel supply duct 5. In the embodiment of the figure, the selector valve 4 is a solenoid valve.Both fuel injection valves 1,2 are connected to a high pressure fuel injection pump 3. The fuel does not need to be supplied to the fuel injection valves 1, 2 directly from the fuel injection pump 3, but it can be pressurized by the pump 3 and stored in the chamber before being supplied to the fuel injection valves 1,2. The pump 3 is a conventional fuel injection pump which can be adjusted for selecting the appropriate fuel injection timing and quantity at different loads. The fuel injection arrangement is provided with a fuel supply duct 5 for delivering the fuel from the fuel injection pump 3 to the fuel injection valves 1,2. Only one of the fuel injection valves 1, 2 is used at a time and therefore the arrangement is provided with a selector valve 4 for allowing flow from the fuel injection pump 3 either to the first fuel injection valve 1 or to the second fuel injection valve valve 2. The selector valve 4 is a three-way valve provided with one inlet port 4a and with a first outlet port 4b and a second outlet port 4c. The first fuel duct 6 connects the first outlet port 4b of the selector valve 4 to the first fuel injection valve 1, and the second fuel duct 7 connects the second outlet port 4c to the second fuel injection valve 2. The Inlet port 4a of the selector valve 4 is connected to the fuel supply duct 5. In the embodiment of the figure, the selector valve 4 is a solenoid valve.

When the engine is operated on liquid fuel, the selector valve 4 is in a position allowing flow from the fuel injection pump 3 to the first fuel injection valve 1 and preventing flow to the second fuel injection valve 2. The timing of the fuel injection and the quantity of the injected fuel is adjusted by the fuel injection pump 3 in a conventional manner. When the pressure in the fuel gallery 1d of the first fuel injection valve 1 is high enough, the valve needle 1b is pushed against the spring 1c, and the first fuel injection valve 1 is opened. Fuel is thus injected through the nozzle 1a of the first fuel injection valve 1 into the combustion chamber of the cylinder 11. The spring 1c pushes the valve needle 1b of the first fuel injection valve 1 into a closed position when the pressure in the fuel gallery 1d drops enough and the fuel injection is consequently terminated.When the engine is operated on a liquid fuel, the selector valve 4 is in position allowing flow from the fuel injection pump 3 to the first fuel injection valve 1 and to prevent the flow to the second fuel injection valve 2. The timing of the fuel injection and the quantity of injected fuel is adjusted by the fuel injection pump 3 in a conventional manner. When the pressure in the fuel gallery 1d of the first fuel injection valve 1 is high enough, the valve needle 1b is pushed against the spring 1c, and the first fuel injection valve 1 is opened. Fuel is thus injected through the nozzle 1a of the first fuel injection valve 1 into the combustion chamber of the cylinder 11. The spring 1c pushes the valve needle 1b of the first fuel injection valve 1 into a closed position when the pressure in the fuel gallery 1d drops enough and the fuel injection is terminated.

When the engine is operated in a gas mode, the selector valve 4 is switched into a position, in which flow from the fuel injection pump 3 to the second fuel injection valve 2 is allowed and flow from the fuel injection pump 3 to the first fuel injection valve 1 is prevented. In the gas mode, only a small amount of liquid fuel is used. The whole amount supplied by the fuel injection pump 3 is thus not needed. Therefore, the arrangement is provided with means 9 for controlling the opening of the second fuel injection valve 2. In the embodiment of the figure, the arrangement is provided with a control valve 9, which is used for actuating the second fuel injection valve 2. With the control valve 9, opening of the second fuel injection valve 2 can be prevented even in the case the pressure in the fuel gallery 2d would be high enough for moving the valve needle 2b against the spring 2c. The opening and closing moments of the second fuel injection valve 2 are thus determined by the control valve 9, which enables accurate timing. The control valve 9 is electrically operated. Also other kinds of actuators could be used for controlling the opening and/or closing timing of the second fuel injection valve 2. The arrangement is further provided with an overflow duct 10, through which the excess fuel can be returned into a tank 12. The overflow duct 10 is connected to the second fuel duct 7, i.e. between the selector valve 4 and the second fuel injection valve 2. The injection pressure needed in the second fuel injection valve 2 is lower than the maximum pressure of the fuel injection pump 3. Therefore, the overflow duct 10 is provided with means 8 for regulating the pressure in the second fuel duct 7. In the embodiment of the figure, the means are an adjustable throttle 8. Instead of a throttle 8, the overflow duct 10 could be provided with a pressure reducing valve. With the pressure regulating means, the injection pressure of the second fuel injection valve 2 can be adjusted to an appropriate level irrespective of the pressure of the fuel injection pump 3.When the engine is operated in gas mode, the selector valve 4 is switched into position, in which flow from the fuel injection pump 3 to the second fuel injection valve 2 is allowed and the flow from the fuel injection pump 3 to the first fuel injection valve 1 is prevented. In gas mode, only a small amount of liquid fuel is used. The whole amount supplied by the fuel injection pump 3 is thus not needed. Therefore, the arrangement is provided with means 9 for controlling the opening of the second fuel injection valve 2. In the arrangement is provided with a control valve 9 which is used for actuating the second fuel injection valve 2. With control valve 9, opening second fuel injection valve 2 can be prevented even in case of pressure in fuel gallery 2d would be high enough for moving valve needle 2b against spring 2c. The opening and closing moments of the second fuel injection valve 2 are thus determined by the control valve 9, which enables accurate timing. The control valve 9 is electrically operated. Also other types of actuators could be used for controlling the opening and / or closing timing of the second fuel injection valve 2. The arrangement is further provided with an overflow duct 10 through which the excess fuel can be returned to the tank 12. The overflow duct 10 is connected to second fuel duct 7, ie between the selector valve 4 and the second fuel injection valve 2. The injection pressure needed in the second fuel injection valve 2 is lower than the maximum pressure of the fuel injection pump 3. Therefore, the overflow duct 10 is provided with means 8 for regulating the pressure in the second fuel duct 7. In the embodiment of the figure, the means are an adjustable throttle 8. Instead of a throttle 8, the overflow duct 10 could be provided with a pressure reducing valve. With the pressure regulating means, the injection pressure of the second fuel injection valve 2 can be adjusted to an appropriate level and the response of the pressure of the fuel injection pump 3.

With an arrangement according to the invention, separate fuel injection system is not needed for injecting the pilot fuel in dual-fuel engines, which make the fuel injection system less complicated and expensive.With an arrangement according to the invention, a separate fuel injection system is not needed for injecting the pilot fuel into dual-fuel engines, which makes the fuel injection system less Complicated and expensive.

It will be appreciated by a person skilled in the art that the invention is not limited to the embodiments described above, but may vary within the scope of the appended claims. For instance, it is possible that all the cylinders of the engine are not provided with an own fuel injection pump, but one pump supplies fuel to several cylinders of the engine.It will be appreciated by a person skilled in the art that the invention is not limited to the embodiments described above, but may vary within the scope of the appended claims. For instance, it is possible that all the cylinders of the engine are not provided with an own fuel injection pump, but one pump supplies fuel to several cylinders of the engine.

Claims (8)

1. Polttoaineenruiskutusjärjestely nestemäisen polttoaineen ruiskuttamiseksi mäntämoottorin sylinteriin (11), joka järjestely käsittää ensimmäisen polttoai-neenruiskutusventtiilin (1), toisen polttoaineenruiskutusventtiilin (2), painevä-liainelähteen (3) polttoaineen toimittamiseksi ensimmäiseen polttoaineenruis-kutusventtiiliin (1) ja toiseen polttoaineenruiskutusventtiiliin (2), valitsinventtiilin (4) virtauksen paineväliainelähteestä (3) sallimiseksi selektiivisesti ensimmäiseen polttoaineenruiskutusventtiiliin (1) tai toiseen polttoaineenruiskutusventtii-liin (2), polttoaineensyöttökanavan (5) paineväliainelähteen (3) yhdistämiseksi valitsinventtiiliin (4), ensimmäisen polttoainekanavan (6) ensimmäisen polttoai-neenruiskutusventtiilin (1) yhdistämiseksi valitsinventtiiliin (4) ja toisen polttoainekanavan (7) toisen polttoaineenruiskutusventtiilin (2) yhdistämiseksi valitsin-venttiiliin (4), tunnettu siitä, että järjestely käsittää välineet (8), jotka ovat kuristin tai paineen alennusventtiili, paineen säätelemiseksi valitsinventtiilin (4) ja toisen polttoaineenruiskutusventtiilin (2) välisessä polttoainekanavassa (7).A fuel injection arrangement for injecting liquid fuel into a piston engine cylinder (11), comprising: a first fuel injection valve (1), a second fuel injection valve (2), a pressurized fluid source (3) for supplying a fuel to a first fuel injection valve (2); , select valve (4) to selectively allow flow from the pressure medium source (3) to the first fuel injection valve (1) or the second fuel injection valve (2), to connect the fuel supply conduit (5) to 1) for connection to a selector valve (4) and for connecting a second fuel injector (7) to a selector valve (4), characterized in that the arrangement comprises means (8) which: are a throttle or pressure relief valve for controlling the pressure in the fuel passage (7) between the selector valve (4) and the second fuel injection valve (2). 2. Patenttivaatimuksen 1 mukainen polttoaineenruiskutusjärjestely, tunnettu siitä, että paineväliainelähde (3) on korkeapaineinen polttoaineen ruiskutus-pumppu.Fuel injection arrangement according to Claim 1, characterized in that the pressure medium source (3) is a high pressure fuel injection pump. 3. Patenttivaatimuksen 1 tai 2 mukainen polttoaineenruiskutusjärjestely, tunnettu siitä, että toinen polttoaineenruiskutusventtiili (2) on konfiguroitu ruiskuttamaan pienempiä määriä polttoainetta kuin ensimmäinen polttoaineenruiskutusventtiili (1).Fuel injection arrangement according to claim 1 or 2, characterized in that the second fuel injection valve (2) is configured to inject smaller amounts of fuel than the first fuel injection valve (1). 4. Patenttivaatimuksen 3 mukainen polttoaineenruiskutusjärjestely, tunnettu siitä, että toinen polttoaineenruiskutusventtiili (2) on pilottipolttoaineventtiili.Fuel injection system according to claim 3, characterized in that the second fuel injection valve (2) is a pilot fuel valve. 5. Jonkin edeltävistä patenttivaatimuksista mukainen polttoaineenruiskutus-järjestely, tunnettu siitä, että järjestely käsittää välineet (9) toisen polttoaineen-ruiskutusventtiilin (2) avaus- ja/tai sulkuajoituksen säätämiseksi.The fuel injection arrangement according to any one of the preceding claims, characterized in that the arrangement comprises means (9) for adjusting the opening and / or closing timing of the second fuel injection valve (2). 6. Patenttivaatimuksen 5 mukainen polttoaineenruiskutusjärjestely, tunnettu siitä, että järjestely käsittää säätöventtiilin (9) toisen polttoaineenruiskutus-venttiilin (2) avaus- ja/tai sulkuajoituksen säätämiseksi.The fuel injection arrangement according to claim 5, characterized in that the arrangement comprises a control valve (9) for controlling the opening and / or closing timing of the second fuel injection valve (2). 7. Jonkin edeltävistä patenttivaatimuksista mukainen polttoaineenruiskutus-järjestely, tunnettu siitä, että järjestely käsittää ylivirtauskanavan (10), joka haarautuu toisesta polttoainekanavasta (7), ja kuristimen (8), joka on järjestetty ylivirtauskanavaan (10) paineen säätelemiseksi toisessa polttoainekanavassa (7).The fuel injection arrangement according to any one of the preceding claims, characterized in that the arrangement comprises an overflow channel (10) which branches from a second fuel channel (7) and a choke (8) arranged in the overflow channel (10) to regulate pressure in the second fuel channel (7). 8. Jonkin patenttivaatimuksista 1-6 mukainen polttoaineenruiskutusjärjeste-ly, tunnettu siitä, että järjestely käsittää ylivirtauskanavan (10), joka haarautuu toisesta polttoainekanavasta (7), ja paineenalennusventtiilin, joka on järjestetty ylivirtauskanavaan (10) paineen säätelemiseksi toisessa polttoainekanavassa (7).Fuel injection system according to one of Claims 1 to 6, characterized in that the arrangement comprises an overflow channel (10) which branches from a second fuel channel (7) and a pressure relief valve arranged in the overflow channel (10) to regulate the pressure in the second fuel channel (7).
FI20126081A 2012-10-18 2012-10-18 Fuel Injection Arrangement FI124743B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FI20126081A FI124743B (en) 2012-10-18 2012-10-18 Fuel Injection Arrangement
CN201380051414.0A CN104755742B (en) 2012-10-18 2013-10-14 Fuel injection arrangement
PCT/FI2013/050983 WO2014060646A1 (en) 2012-10-18 2013-10-14 Fuel injection arrangement
KR1020157011572A KR102034334B1 (en) 2012-10-18 2013-10-14 Fuel injection arrangement
EP13792715.8A EP2917554B1 (en) 2012-10-18 2013-10-14 Fuel injection arrangement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20126081 2012-10-18
FI20126081A FI124743B (en) 2012-10-18 2012-10-18 Fuel Injection Arrangement

Publications (2)

Publication Number Publication Date
FI20126081A FI20126081A (en) 2014-04-19
FI124743B true FI124743B (en) 2015-01-15

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DE10040738B4 (en) * 1999-08-19 2012-12-13 Avl List Gmbh Injection device for an internal combustion engine with an injection nozzle designed as a double needle nozzle
DE10160258A1 (en) * 2001-12-07 2003-06-18 Bosch Gmbh Robert Fuel injection device for an internal combustion engine
JP2006017059A (en) * 2004-07-02 2006-01-19 Toyota Motor Corp Fuel supply device for engine
FI123513B (en) 2010-12-02 2013-06-14 Waertsilae Finland Oy Fuel supply unit, method for operating it and combustion engine
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FI20126081A (en) 2014-04-19
EP2917554A1 (en) 2015-09-16
WO2014060646A1 (en) 2014-04-24
CN104755742B (en) 2017-04-19
CN104755742A (en) 2015-07-01
EP2917554B1 (en) 2017-02-08
KR102034334B1 (en) 2019-10-18
KR20150070212A (en) 2015-06-24

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