WO2014068180A1 - Fuel injection system and safety valve arrangement - Google Patents

Fuel injection system and safety valve arrangement Download PDF

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Publication number
WO2014068180A1
WO2014068180A1 PCT/FI2013/051013 FI2013051013W WO2014068180A1 WO 2014068180 A1 WO2014068180 A1 WO 2014068180A1 FI 2013051013 W FI2013051013 W FI 2013051013W WO 2014068180 A1 WO2014068180 A1 WO 2014068180A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
safety valve
pressure
injection system
fuel injection
Prior art date
Application number
PCT/FI2013/051013
Other languages
French (fr)
Inventor
Janne ENLUND
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 KR1020157013623A priority Critical patent/KR102032013B1/en
Priority to EP13799338.2A priority patent/EP2923072B1/en
Priority to CN201380057018.9A priority patent/CN104781546B/en
Publication of WO2014068180A1 publication Critical patent/WO2014068180A1/en

Links

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 fuel pressure in the common rail system after the high pressure pump is relatively high, even above 2000 bar.
  • the pressure accumulator is provid- ed 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.
  • 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.
  • the invention can also be applied to engines with smaller and larger cylin- der 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.
  • 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 accumula- tors 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 1 1 , which is mounted to the second pressure accumulator 8.
  • the safety valve 1 1 is arranged to open when the fuel pressure in the feed system 6 reaches a predetermined value.
  • the safety valve 1 1 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 1 1 .
  • 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
  • the safety valve 1 1 opens. Excess pressure in the feed system 6 is released through the safety valve 1 1 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 1 1 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 in- jector 12 is provided with separate pressure accumulator 20, in which fuel is stored before injection.
  • the safety valve 1 1 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)

Abstract

The fuel injection system (1) of a reciprocating engine comprises 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), and a safety valve arrangement (18) for releasing fuel pressure from the feed system (6). The 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 comprises at least two expansion volumes (15) connected in series, and one of the expansion volumes (15) is connected to an outlet (19) of the safety valve (11).

Description

Fuel injection system and safety valve arrangement
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 provid- ed 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.
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 injec- tion 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 cylin- der 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 accumula- tors 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 1 1 , which is mounted to the second pressure accumulator 8. The safety valve 1 1 is arranged to open when the fuel pressure in the feed system 6 reaches a predetermined value. The safety valve 1 1 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 1 1 . 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 1 1 opens. Excess pressure in the feed system 6 is released through the safety valve 1 1 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 1 1 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 in- jector 12 is provided with separate pressure accumulator 20, in which fuel is stored before injection. The safety valve 1 1 of the safety valve arrangement 18 can be connected to the fuel line.

Claims

Claims:
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), and a safety valve arrangement (18) for releasing fuel pressure from the feed system (6), which safety valve arrangement (18) comprises a safety valve (1 1 ), which is arranged to open when the fuel pressure in the feed system (6) reaches a predetermined value, characterized in that the safety valve arrangement (18) further comprises at least two expansion volumes (15) connected in series for reducing pressure in steps, and that one of the expansion volumes (15) is connected to an outlet (19) of the safety valve (1 1 ).
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 last expansion volume (15) is provided with a throttle
(16) .
5. The fuel injection system (1 ) according to claim 1 , characterized in that the first expansion volume (15) in fuel flow direction has the largest volume.
6. The fuel injection system (1 ) according to claim 5, characterized in that the last expansion volume (15) in fuel flow direction has the smallest volume.
7. The fuel injection system (1 ) according to claim 1 or 2, characterized in that the volumes of the expansion volumes (15) are equal.
8. 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).
9. A safety valve arrangement for releasing pressure from a pressurized system, characterized in that the safety valve arrangement (18) further comprises at least two expansion volumes (15) connected in series for reducing pressure in steps, and that one of the expansion volumes (15) is connected to an outlet (19) of the safety valve (1 1 ).
PCT/FI2013/051013 2012-11-01 2013-10-28 Fuel injection system and safety valve arrangement WO2014068180A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020157013623A KR102032013B1 (en) 2012-11-01 2013-10-28 Fuel injection system and safety valve arrangement
EP13799338.2A EP2923072B1 (en) 2012-11-01 2013-10-28 Fuel injection system
CN201380057018.9A CN104781546B (en) 2012-11-01 2013-10-28 Fuel injection system and safety valve arrangement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20126142 2012-11-01
FI20126142A FI20126142A7 (en) 2012-11-01 2012-11-01 Fuel injection system and safety valve arrangement

Publications (1)

Publication Number Publication Date
WO2014068180A1 true WO2014068180A1 (en) 2014-05-08

Family

ID=49709707

Family Applications (1)

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

Country Status (5)

Country Link
EP (1) EP2923072B1 (en)
KR (1) KR102032013B1 (en)
CN (1) CN104781546B (en)
FI (1) FI20126142A7 (en)
WO (1) WO2014068180A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5429094A (en) * 1992-02-04 1995-07-04 Nippondenso Co., Ltd. Fuel pressure regulator
EP0964153A2 (en) * 1998-06-08 1999-12-15 Wärtsilä NSD Oy Ab Control and safety valve arrangement in a fuel feeding system
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
EP2110543A1 (en) * 2008-04-18 2009-10-21 Caterpillar Motoren GmbH & Co. KG Safety valve
FR2933147A3 (en) * 2008-06-26 2010-01-01 Renault Sas FUEL INJECTION ASSEMBLY
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

Family Cites Families (5)

* 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
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
FI120886B (en) * 2008-06-05 2010-04-15 Waertsilae Finland Oy Fuel injection system for piston engine
CN101684765B (en) * 2009-04-22 2011-05-25 北京理工大学 Low-pressure oil circuit voltage stabilization and distribution device for unit pump fuel system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5429094A (en) * 1992-02-04 1995-07-04 Nippondenso Co., Ltd. Fuel pressure regulator
EP0964153A2 (en) * 1998-06-08 1999-12-15 Wärtsilä NSD Oy Ab Control and safety valve arrangement in a fuel feeding system
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
EP2110543A1 (en) * 2008-04-18 2009-10-21 Caterpillar Motoren GmbH & Co. KG Safety valve
FR2933147A3 (en) * 2008-06-26 2010-01-01 Renault Sas FUEL INJECTION ASSEMBLY
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
FI20126142L (en) 2014-05-02
EP2923072B1 (en) 2016-12-07
KR20150079772A (en) 2015-07-08
CN104781546A (en) 2015-07-15
EP2923072A1 (en) 2015-09-30
KR102032013B1 (en) 2019-11-08
CN104781546B (en) 2017-05-03
FI20126142A7 (en) 2014-05-02

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