EP2923072B1 - Fuel injection system - Google Patents

Fuel injection system Download PDF

Info

Publication number
EP2923072B1
EP2923072B1 EP13799338.2A EP13799338A EP2923072B1 EP 2923072 B1 EP2923072 B1 EP 2923072B1 EP 13799338 A EP13799338 A EP 13799338A EP 2923072 B1 EP2923072 B1 EP 2923072B1
Authority
EP
European Patent Office
Prior art keywords
fuel
safety valve
pressure
expansion
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.)
Active
Application number
EP13799338.2A
Other languages
German (de)
French (fr)
Other versions
EP2923072A1 (en
Inventor
Janne ENLUND
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wartsila Finland Oy
Original Assignee
Wartsila 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 Wartsila Finland Oy filed Critical Wartsila Finland Oy
Publication of EP2923072A1 publication Critical patent/EP2923072A1/en
Application granted granted Critical
Publication of EP2923072B1 publication Critical patent/EP2923072B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/007—Venting 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
    • 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
    • F02M63/023—Means for varying pressure in common rails
    • F02M63/0235—Means for varying pressure in common rails by bleeding fuel pressure
    • F02M63/0245—Means for varying pressure in common rails by bleeding fuel pressure between the high pressure pump and the 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
    • 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
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • F02M37/0029—Pressure regulator in the low pressure fuel system
    • 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
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • 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
    • 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
    • F02M63/023—Means for varying pressure in common rails
    • F02M63/0235—Means for varying pressure in common rails by bleeding fuel pressure
    • F02M63/025—Means for varying pressure in common rails by bleeding fuel pressure from the 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
    • F02M2200/03—Fuel-injection apparatus having means for reducing or avoiding stress, e.g. the stress caused by mechanical force, by fluid pressure or by temperature variations

Definitions

  • the invention relates to a fuel injection system of a reciprocating engine.
  • the invention also relates to a safety valve arrangement for releasing pressure from a pressurized system, such as a fuel injection system of a reciprocating engine.
  • a so-called common rail fuel injection system is commonly used.
  • the pressure supply and the fuel injection are functionally separated from each other.
  • Fuel is fed by means of high pressure pump into a common pressure supply, which comprises a pressure accumulator, from which fuel is led through separate pipes into the injector of each cylinder.
  • the pressure accumulator is provided with a safety valve, which maintains the fuel pressure in the system below a predetermined level.
  • the safety valve releases the pressure from the pressure accumulator to a low pressure system if the pressure exceeds this level.
  • the outlet side of the safety valve is provided with an expansion volume, which reduces the fuel pressure to a suitable level before entering the low pressure system.
  • a safety valve for a common rail system is shown in EP 2 110 543 A .
  • the pressure drop in the expansion volume is quite high, which may cause stresses to the safety valve and other components of the fuel injection system. For this reason stronger and thus more expensive components must be used.
  • An object of the present invention is to provide a fuel injection system with an improved pressure release arrangement.
  • the object can be achieved by a fuel injection system according to claim 1.
  • the fuel injection system according to the invention comprises fuel injectors for injecting fuel into cylinders of the engine, a pump for feeding fuel to at least one fuel injector, a feed system for conducting fuel from the pump to at least one fuel injector, and a safety valve arrangement for releasing fuel pressure from the feed system, which safety valve arrangement comprises a safety valve, which is arranged to open when the fuel pressure in the feed system reaches a predetermined value.
  • the safety valve arrangement further comprises at least two expansion volumes connected in series, and one of the expansion volumes is connected to an outlet of the safety valve.
  • the pressure after the safety valve is dropped in steps. Instead of having one large expansion volume with high pressure drop, at least two successive expansion volumes are provided and the pressure is reduced is smaller steps. As a result, the stress directed to the safety valve and other system components can be reduced. Since the expansion volumes can be made smaller than in the case of a single volume, the stress affecting the expansion volumes is reduced.
  • the safety valve arrangement according to the invention comprises at least two expansion volumes connected in series, and one of the expansion volumes is connected to an outlet of the safety valve.
  • the drawing shows a common rail fuel injection system 1 of a diesel engine.
  • the engine is a large diesel engine, which can be used as a main and/or an auxiliary engine in ships and/or in power plants for generation of electricity and/or heat.
  • the engine is a medium speed, four-stroke engine. However, the use of the invention is not limited to four-stroke engines.
  • the maximum rotational speed of the engine is 300-1200 rpm.
  • Cylinders 13 of the engine can be arranged in a single bank or in two banks in a V-configuration. Typically, the engine has 8-20 cylinders 13.
  • the cylinder bore is typically 10-80 cm. However, the invention can also be applied to engines with smaller and larger cylinder bores.
  • the engine can be operated by heavy fuel oil.
  • the fuel injection system 1 comprises fuel injectors 12 for injecting fuel into the cylinders 13 of the engine.
  • the fuel injection system 1 further comprises a fuel source, for example a fuel tank 2, from which fuel is fed by means of a low pressure 3 pump along a fuel line 4 into a high pressure pump 5.
  • the high pressure pump 5 elevates the fuel pressure to a level enabling that a sufficient injection pressure may be obtained in the injectors 12.
  • the fuel injection system 1 can comprise a common high pressure pump for both cylinder banks or each cylinder bank can be provided with a separate high pressure pump.
  • the fuel injection system 1 comprises a feed system 6, which connects the high pressure pump 5 to the fuel injectors 12. During the engine operation, fuel pressure in the feed system 6 is typically over 2000 bar.
  • the feed system 6 is provided with at least one pressure accumulator 7, 8 for storing fuel.
  • the fuel injection system 1 shown in the drawing comprises two separate accumulators 7, 8 arranged in flow connection with each other via a connecting pipe 9. Fuel is fed from the high pressure pump 5 into the first pressure accumulator 7 from which fuel is further conducted through the connecting pipe 9 into a second pressure accumulator 8.
  • the feed system 6 comprises supply lines 14, by means of which the fuel injectors 13 are connected to the pressure accumulators 7, 8. Also each fuel injector 12 is provided with a separate pressure accumulator 20 for storing fuel before the injection.
  • the second pressure accumulator 8 is provided with a circulation valve 10 through which fuel can be circulated in the injection system 1 for heating it before the start-up of the engine.
  • the fuel injection system 1 comprises a safety valve arrangement 18 for releasing the pressure from the feed system 6.
  • the safety valve arrangement comprises a safety valve 11, which is mounted to the second pressure accumulator 8.
  • the safety valve 11 is arranged to open when the fuel pressure in the feed system 6 reaches a predetermined value.
  • the safety valve 11 also maintains the pressure in the accumulators 7, 8 below said predetermined value.
  • the safety valve arrangement 18 further comprises at least two, typically 2-5 expansion volumes 15, which are fluidly connected in series.
  • Each expansion volume 15 is connected to the preceding and/or to the subsequent expansion volume 15 via one or more ducts and/or ports.
  • the cross-sectional areas of the ducts or ports in the flow direction are smaller than the cross-sectional areas of the expansion volumes 15.
  • the flow from an expansion volume 15 to the subsequent expansion volume 15 is thus restricted for allowing different pressure levels in the expansion volumes 15.
  • the embodiment shown in the drawing comprises three expansion volumes 15.
  • One of the expansion volumes 15, i.e. the first expansion volume in the fuel flow direction, is connected to the outlet of the safety valve 11.
  • a throttle 16 is arranged between each two successive expansion volumes 15.
  • the downstream side of the last expansion volume 15 is also provided with a throttle 16.
  • the last expansion volume 15 is connected to the return line 17, which leads to the fuel source, i.e. the fuel tank 2.
  • the fuel pressure in the return line 17 is lower than that in the feed system 6.
  • the expansion volume 15 can be e.g. a container.
  • the volumes of the expansion volumes 15 can be equal.
  • the volumes of the expansion volumes 15 can be unequal.
  • the first expansion volume 15 in fuel flow direction can have the largest volume and the last expansion volume 15 the smallest volume.
  • the safety valve 11 opens. Excess pressure in the feed system 6 is released through the safety valve 11 and the expansion volumes 15 to the return line 17.
  • the expansion volumes 15 and the throttles 16 reduce the pressure in steps to a suitable level before entering the return line 17.
  • the fuel pressure after the last expansion volume 16 is below 15 bar. Also fuel flows from the feed system 6 through the safety valve 11 and the expansion volumes 15 into the return line 17.
  • the invention may have embodiments different from that described above.
  • the pressure accumulators 7, 8 can be replaced by fuel line, which connects the high pressure pump 5 to the supply lines 14.
  • each fuel injector 12 is provided with separate pressure accumulator 20, in which fuel is stored before injection.
  • the safety valve 11 of the safety valve arrangement 18 can be connected to the fuel line.

Landscapes

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

Description

  • The invention relates to a fuel injection system of a reciprocating engine. The invention also relates to a safety valve arrangement for releasing pressure from a pressurized system, such as a fuel injection system of a reciprocating engine.
  • For improving the operation of reciprocating engines a so-called common rail fuel injection system is commonly used. In the common rail system the pressure supply and the fuel injection are functionally separated from each other. Fuel is fed by means of high pressure pump into a common pressure supply, which comprises a pressure accumulator, from which fuel is led through separate pipes into the injector of each cylinder.
  • The fuel pressure in the common rail system after the high pressure pump is relatively high, even above 2000 bar. In order to prevent leakages and other damages in case of a system malfunction, the pressure accumulator is provided with a safety valve, which maintains the fuel pressure in the system below a predetermined level. The safety valve releases the pressure from the pressure accumulator to a low pressure system if the pressure exceeds this level. The outlet side of the safety valve is provided with an expansion volume, which reduces the fuel pressure to a suitable level before entering the low pressure system.
  • A safety valve for a common rail system is shown in EP 2 110 543 A . Typically the pressure drop in the expansion volume is quite high, which may cause stresses to the safety valve and other components of the fuel injection system. For this reason stronger and thus more expensive components must be used.
  • An object of the present invention is to provide a fuel injection system with an improved pressure release arrangement.
  • The object can be achieved by a fuel injection system according to claim 1. The fuel injection system according to the invention comprises fuel injectors for injecting fuel into cylinders of the engine, a pump for feeding fuel to at least one fuel injector, a feed system for conducting fuel from the pump to at least one fuel injector, and a safety valve arrangement for releasing fuel pressure from the feed system, which safety valve arrangement comprises a safety valve, which is arranged to open when the fuel pressure in the feed system reaches a predetermined value. The safety valve arrangement further comprises at least two expansion volumes connected in series, and one of the expansion volumes is connected to an outlet of the safety valve.
  • In the fuel injection system according to the invention the pressure after the safety valve is dropped in steps. Instead of having one large expansion volume with high pressure drop, at least two successive expansion volumes are provided and the pressure is reduced is smaller steps. As a result, the stress directed to the safety valve and other system components can be reduced. Since the expansion volumes can be made smaller than in the case of a single volume, the stress affecting the expansion volumes is reduced.
  • The safety valve arrangement according to the invention comprises at least two expansion volumes connected in series, and one of the expansion volumes is connected to an outlet of the safety valve.
  • In the following the invention will be described by way of an example with reference to the accompanying drawing, which shows schematically a fuel injection system according to an embodiment of the invention.
  • The drawing shows a common rail fuel injection system 1 of a diesel engine. The engine is a large diesel engine, which can be used as a main and/or an auxiliary engine in ships and/or in power plants for generation of electricity and/or heat. The engine is a medium speed, four-stroke engine. However, the use of the invention is not limited to four-stroke engines. The maximum rotational speed of the engine is 300-1200 rpm. Cylinders 13 of the engine can be arranged in a single bank or in two banks in a V-configuration. Typically, the engine has 8-20 cylinders 13. The cylinder bore is typically 10-80 cm. However, the invention can also be applied to engines with smaller and larger cylinder bores. The engine can be operated by heavy fuel oil.
  • The fuel injection system 1 comprises fuel injectors 12 for injecting fuel into the cylinders 13 of the engine. The fuel injection system 1 further comprises a fuel source, for example a fuel tank 2, from which fuel is fed by means of a low pressure 3 pump along a fuel line 4 into a high pressure pump 5. The high pressure pump 5 elevates the fuel pressure to a level enabling that a sufficient injection pressure may be obtained in the injectors 12. If the cylinders 13 are arranged in V-configuration, the fuel injection system 1 can comprise a common high pressure pump for both cylinder banks or each cylinder bank can be provided with a separate high pressure pump.
  • The fuel injection system 1 comprises a feed system 6, which connects the high pressure pump 5 to the fuel injectors 12. During the engine operation, fuel pressure in the feed system 6 is typically over 2000 bar. The feed system 6 is provided with at least one pressure accumulator 7, 8 for storing fuel. The fuel injection system 1 shown in the drawing comprises two separate accumulators 7, 8 arranged in flow connection with each other via a connecting pipe 9. Fuel is fed from the high pressure pump 5 into the first pressure accumulator 7 from which fuel is further conducted through the connecting pipe 9 into a second pressure accumulator 8. The feed system 6 comprises supply lines 14, by means of which the fuel injectors 13 are connected to the pressure accumulators 7, 8. Also each fuel injector 12 is provided with a separate pressure accumulator 20 for storing fuel before the injection.
  • The second pressure accumulator 8 is provided with a circulation valve 10 through which fuel can be circulated in the injection system 1 for heating it before the start-up of the engine. The fuel injection system 1 comprises a safety valve arrangement 18 for releasing the pressure from the feed system 6. The safety valve arrangement comprises a safety valve 11, which is mounted to the second pressure accumulator 8. The safety valve 11 is arranged to open when the fuel pressure in the feed system 6 reaches a predetermined value. The safety valve 11 also maintains the pressure in the accumulators 7, 8 below said predetermined value.
  • The safety valve arrangement 18 further comprises at least two, typically 2-5 expansion volumes 15, which are fluidly connected in series. Each expansion volume 15 is connected to the preceding and/or to the subsequent expansion volume 15 via one or more ducts and/or ports. The cross-sectional areas of the ducts or ports in the flow direction are smaller than the cross-sectional areas of the expansion volumes 15. The flow from an expansion volume 15 to the subsequent expansion volume 15 is thus restricted for allowing different pressure levels in the expansion volumes 15. The embodiment shown in the drawing comprises three expansion volumes 15. One of the expansion volumes 15, i.e. the first expansion volume in the fuel flow direction, is connected to the outlet of the safety valve 11. A throttle 16 is arranged between each two successive expansion volumes 15. The downstream side of the last expansion volume 15 is also provided with a throttle 16. The last expansion volume 15 is connected to the return line 17, which leads to the fuel source, i.e. the fuel tank 2. The fuel pressure in the return line 17 is lower than that in the feed system 6. The expansion volume 15 can be e.g. a container. The volumes of the expansion volumes 15 can be equal. Alternatively, the volumes of the expansion volumes 15 can be unequal. For example, the first expansion volume 15 in fuel flow direction can have the largest volume and the last expansion volume 15 the smallest volume.
  • When the pressure in the feed system 6, for example in pressure accumulator 7,8 reaches a predetermined value, the safety valve 11 opens. Excess pressure in the feed system 6 is released through the safety valve 11 and the expansion volumes 15 to the return line 17. The expansion volumes 15 and the throttles 16 reduce the pressure in steps to a suitable level before entering the return line 17. Typically, the fuel pressure after the last expansion volume 16 is below 15 bar. Also fuel flows from the feed system 6 through the safety valve 11 and the expansion volumes 15 into the return line 17.
  • The invention may have embodiments different from that described above. The pressure accumulators 7, 8 can be replaced by fuel line, which connects the high pressure pump 5 to the supply lines 14. In this embodiment each fuel injector 12 is provided with separate pressure accumulator 20, in which fuel is stored before injection. The safety valve 11 of the safety valve arrangement 18 can be connected to the fuel line.

Claims (6)

  1. A fuel injection system (1) of a reciprocating engine, comprising:
    - fuel injectors (12) for injecting fuel into cylinders (13) of the engine,
    - a pump (5) for feeding fuel to at least one fuel injector (12),
    - a feed system (6) for conducting fuel from the pump (5) to at least one fuel injector (12),
    - at least one pressure accumulator (7, 8, 20) for storing fusel, and
    a safety valve arrangement (18) for releasing fuel pressure from the feed system (6), which safety valve arrangement (18) comprises a safety valve (11), which is arranged to open when the fuel pressure in the feed system (6) reaches a predetermined value, the safety valve arrangement (18) further comprising at least two expansion volumes (15) connected in series for reducing pressure in steps, one of the expansion volumes (15) being connected to an outlet (19) of the safety valve (11), characterized in that the first expansion volume (15) in fuel flow direction has the largest volume or the volumes of the expansion volumes (15) are equal.
  2. The fuel injection system (1) according to claim 1, characterized in that the safety valve arrangement (18) comprises 2-5 expansion volumes (15) connected in series.
  3. The fuel injection system (1) according to claim 1 or 2, characterized in that a throttle (16) is arranged between each two successive expansion volumes (15).
  4. The fuel injection system (1) according to claim 3, characterized in that a downstream side of a lasi expansion volume (15) is provided with a throttle (16).
  5. The fuel injection system (1) according to any of the preceding claims, characterized in that the last expansion volume (15) in fuel flow direction has the smallest volume.
  6. The fuel injection system (1) according to claim 1, characterized in that the feed system (6) comprises at least one pressure accumulator (7. 8) to which the fuel injectors (12) are connected by separate supply lines (14), and that the pressure accumulator (7, 8) is provided with the safety valve arrangement (18).
EP13799338.2A 2012-11-01 2013-10-28 Fuel injection system Active EP2923072B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20126142A FI20126142A (en) 2012-11-01 2012-11-01 Fuel injection system and safety valve arrangement
PCT/FI2013/051013 WO2014068180A1 (en) 2012-11-01 2013-10-28 Fuel injection system and safety valve arrangement

Publications (2)

Publication Number Publication Date
EP2923072A1 EP2923072A1 (en) 2015-09-30
EP2923072B1 true EP2923072B1 (en) 2016-12-07

Family

ID=49709707

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13799338.2A Active EP2923072B1 (en) 2012-11-01 2013-10-28 Fuel injection system

Country Status (5)

Country Link
EP (1) EP2923072B1 (en)
KR (1) KR102032013B1 (en)
CN (1) CN104781546B (en)
FI (1) FI20126142A (en)
WO (1) WO2014068180A1 (en)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4392507A (en) * 1981-05-15 1983-07-12 Stant Inc. Two-stage pressure relief valve
JP2985471B2 (en) * 1992-02-04 1999-11-29 株式会社デンソー Fuel pressure regulator
FI107830B (en) * 1998-06-08 2001-10-15 Waertsilae Tech Oy Ab Control and safety valve device in a fuel supply system
DE10342485A1 (en) * 2003-09-15 2005-04-07 Robert Bosch Gmbh Pressure release device for hydraulic lines as in common rail fuel injection systems for disassembly has overlapping piston that is partly removed to increase volume
US6935314B2 (en) * 2003-12-19 2005-08-30 Millennium Industries Corp. Fuel rail air damper
DE102007016134A1 (en) * 2006-04-25 2007-11-08 Robert Bosch Gmbh High pressure fuel pump, has throttle arrangement provided at high pressure side of valve seat of pressure limiting valve, where cross section of arrangement is approximately equal to desired maximum opening cross section of valve
DE102007010502A1 (en) * 2007-03-05 2008-09-11 Robert Bosch Gmbh High-pressure fuel pump for internal-combustion engine, has pumping element for extracting fuel of suction pipe into pressure pipe, where pressure relief valve and throttle unit are connected in series in discharge line
ATE551522T1 (en) * 2008-04-18 2012-04-15 Caterpillar Motoren Gmbh & Co SAFETY VALVE
FI120886B (en) * 2008-06-05 2010-04-15 Waertsilae Finland Oy Fuel injection system for piston engine
FR2933147A3 (en) * 2008-06-26 2010-01-01 Renault Sas Pressure regulation module for fuel injection assembly of internal combustion engine, has valve permitting passage of fluid from chamber towards another chamber when upstream pressure in latter chamber is less than vaporization pressure
CN101684765B (en) * 2009-04-22 2011-05-25 北京理工大学 Low-pressure oil way pressure stabilizing and distributing device of monoblock pump fuel oil system
DE102010031356A1 (en) * 2010-07-15 2012-01-19 Robert Bosch Gmbh Throttling component for injection system of fuel-combustion engine, has common high-pressure accumulator for supplying fuel to multiple cylinders of fuel combustion engine

Also Published As

Publication number Publication date
WO2014068180A1 (en) 2014-05-08
KR20150079772A (en) 2015-07-08
CN104781546B (en) 2017-05-03
CN104781546A (en) 2015-07-15
EP2923072A1 (en) 2015-09-30
KR102032013B1 (en) 2019-11-08
FI20126142A (en) 2014-05-02

Similar Documents

Publication Publication Date Title
EP0959245B1 (en) Fuel feeding system
US7690361B2 (en) System and method for metering fuel in a high pressure pump system
JP3969454B1 (en) Diesel engine diesel engine
JP5832616B2 (en) Turbocharged large low-speed two-stroke internal combustion engine with dual fuel supply system
JP2016537547A (en) Fuel supply system for internal combustion engine
US20190120149A1 (en) Dual-fuel fuel injection system for an internal combustion engine
US7568471B2 (en) Diesel fuel injection priming system
CN103080531B (en) Fuel injection system with pressure-controlled bleed function
JP4787208B2 (en) LIQUID GAS FUEL SUPPLY DEVICE AND METHOD FOR DRIVING HIGH PRESSURE PUMP
US7669570B2 (en) Diesel fuel injection priming system
EP2923072B1 (en) Fuel injection system
CN101660474B (en) Oil supply device for internal combustion engine
KR101751674B1 (en) Fluid system and internal combustion engine
EP3032086A1 (en) Fuel injection arrangement
EP3032091B1 (en) Fuel injection arrangement
US20160169181A1 (en) Distributed Fuel Injection Equipment
EP3099924B1 (en) Common rail fuel injection system
EP3283755B1 (en) Fuel injection system for a piston engine and a method for damping pressure fluctuations
FI124743B (en) Fuel Injection Arrangement
EP3262294B1 (en) Fuel injection system
CN205036487U (en) Modular fuel injection equipment and engine
US20110146624A1 (en) Fuel delivery injection system
GB2564653A (en) Fuel injection equipment

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20150525

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20160705

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ENLUND, JANNE

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: AT

Ref legal event code: REF

Ref document number: 851966

Country of ref document: AT

Kind code of ref document: T

Effective date: 20161215

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602013015147

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20161207

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170307

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170308

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 851966

Country of ref document: AT

Kind code of ref document: T

Effective date: 20161207

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170407

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170407

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20170307

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602013015147

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20170908

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20171028

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20180629

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171031

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171028

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171028

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171028

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20171028

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20131028

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20161207

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20231026

Year of fee payment: 11

Ref country code: FI

Payment date: 20231020

Year of fee payment: 11

Ref country code: DE

Payment date: 20231020

Year of fee payment: 11