EP1963661A1 - Arrangement for dampening the pressure vibration of a fuel feed system of a piston engine - Google Patents

Arrangement for dampening the pressure vibration of a fuel feed system of a piston engine

Info

Publication number
EP1963661A1
EP1963661A1 EP06808043A EP06808043A EP1963661A1 EP 1963661 A1 EP1963661 A1 EP 1963661A1 EP 06808043 A EP06808043 A EP 06808043A EP 06808043 A EP06808043 A EP 06808043A EP 1963661 A1 EP1963661 A1 EP 1963661A1
Authority
EP
European Patent Office
Prior art keywords
space
fuel
pressure
gas
opening
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.)
Granted
Application number
EP06808043A
Other languages
German (de)
French (fr)
Other versions
EP1963661B1 (en
EP1963661A4 (en
Inventor
Kai Lehtonen
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 EP1963661A1 publication Critical patent/EP1963661A1/en
Publication of EP1963661A4 publication Critical patent/EP1963661A4/en
Application granted granted Critical
Publication of EP1963661B1 publication Critical patent/EP1963661B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
    • 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
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F02M55/025—Common rails
    • 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
    • F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
    • F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations

Definitions

  • the present invention relates to an arrangement for dampening the pressure vibration of the fuel feed system of a piston engine.
  • injection pumps are used for introducing pressurized fuel into the cylinders via injector nozzles.
  • the injection pump comprises a cylinder element having a reciprocating piston arranged in a pressure chamber thereof. The movement of the piston causes the increase of the pressure of the fuel.
  • the cylinder element usually includes one or two inlet channels through which fuel is introduced from the low pressure side of the fuel feed system into a pressure plenum as the piston is in its bottom dead center. The piston moving upwards in the pressure plenum covers the fuel inlet channels and pressurized fuel flows from the pressure plenum to the high pressure pipe leading to the injector nozzle.
  • the fuel flow to the injector nozzle stops as a screw-like cut in the piston moves to the inlet channel and uncovers the inlet channel, whereby fuel in high pressure is discharged via the inlet channel to the low pressure side of the fuel feed system. This, in turn, causes a pressure pulse on the low pressure side of the fuel feed system.
  • injection pumps are in flow connection with the main fuel pipe of the low pressure side, whereby the pressure in the pipe will continuously vibrate as the engine is running.
  • a gas dampener comprises a gas space separated from the fuel feed system by means of a membrane. As the fuel pressure is changed, the membrane moves and the volume of the fuel space is changed, whereby the pressure vibration in the fuel feed system is dampened. The service life of such a dampener is limited, as the membrane can easily be broken, whereby the dampener is unusable.
  • a mechanical dampener comprises a piston or other intermediate piece arranged inside a space in the dampener.
  • the space is in flow connection with the fuel feed system, whereby the piston moves and thus the volume of the fuel feed system is changed as the pressure fluctuates.
  • the piston is supported by the dampener by means of at least one spring dampening the movement of the piston. The service life of this kind of mechanical dampener is limited by the durability of the springs.
  • the object of the invention is to produce an improved arrangement for dampening the pressure vibration of the fuel feed system of a piston engine.
  • the arrangement according to the invention for dampening the pressure vibration of the fuel feed system of a piston engine comprises a vibration dampener having a body part inside which is a space containing a movably arranged intermediate piece.
  • the body part has a first opening arranged to open to the first side of the intermediate piece for connecting the space with the fuel feed system and a second opening arranged to open into the space on the other side of the intermediate piece, the opening being in flow connection with the source of pressurized gas.
  • the intermediate piece comprises a first surface limiting the space in the part on the side of the first opening and a second surface limiting the space in the part on the side of the second opening. Further, the area of the first surface is larger than that of the second surface.
  • the pressure of the gas applying a force on the intermediate piece can be smaller than the pressure of the fuel for maintaining an equilibrium of the intermediate piece. Due to the low pressure the load on the gas system is low, whereby the design of the system can be simple.
  • Figure 1 is an illustration of a part of a fuel feed system of an internal combustion engine, the system being provided with a pressure vibration dampener according to the invention.
  • Figure 2 illustrates the vibration dampener of figure 1 in a cross-sectional view.
  • FIG. 1 is a schematic view of a part of a fuel feed system 1 of an internal combustion engine.
  • the internal combustion engine is, for example, a large multi- cylinder diesel engine used in ships or power plants.
  • crude oil can be used as fuel.
  • Fuel is fed from the fuel tank 2 with a fuel pump 3 in a relatively low pressure via the low pressure piping 4 to each injection pump 5.
  • the low pressure piping 4 extends from the high pressure side of the fuel pump 3 to each injection pump 5.
  • the low pressure piping 4 comprises a main line 6 from which a branch line 7 extends to each injection pump 5.
  • Each injection pump 5 is connected to the injector nozzle 9 via high-pressure pipes 10.
  • the injection pump 5 carries out the injection of fuel together with the injector nozzles 9.
  • the injector pump increases the fuel pressure to such a level that a sufficient injection pressure is achieved at injector nozzles 9.
  • the fuel feed system also includes low-pressure return channels 8 returning from each injection pump 5 back to the fuel tank 2. Fuel is directed from the injection pumps 5 back to the fuel tank 2 through return channels 8.
  • One or more pressure vibration dampener(s) 1 1 is arranged in the fuel feed system.
  • the vibration dampener By means of the vibration dampener the fuel pressure fluctuations occurring in the fuel feed system 1 are dampened. Pressure fluctuations are caused, for example, as the high-pressure fuel in the injection pumps 5 is discharged into the low-pressure piping 4 when the injection stops. Because a number of injection pumps 5 are in flow connection with the same main line 6, the pressure in the main line 6 vibrates rapidly.
  • the vibration dampener 11 is arranged in connection with the low-pressure piping 4, for example. In the embodiment of figure 1 there are two dampeners 1 1 and they are arranged in the main line 6, preferably near the openings of the branch lines 7 leading to the injection pumps 5. Alternatively or additionally pressure vibration dampeners 1 1 can be installed in other places of the low pressure piping 4 or other places of the fuel system, such as in connection with the injection pump 5.
  • FIG. 2 illustrates in more detail the vibration dampener 1 1 shown in figure 1.
  • the dampener comprises a body part 12 delimiting a space 13 inside it.
  • the body part 12 includes a first opening 14, by means of which the space 13 is in flow connection with the fuel pipes of the fuel feed system 1 , such as the main line 6.
  • the body part 12 additionally includes a second opening 15 by means of which the space 13 is in flow connection with the gas pipe 20 containing pressurized gas, such as air.
  • the pressure of the gas in gas pipe 20 is higher than the ambient pressure.
  • the cross-sectional area of the space 13 on the side of the first opening 14 is smaller than on the side of the second opening 15.
  • the space 13 includes an intermediate piece arranged to reciprocate, such as a piston 16.
  • the first opening 14 opens on the first side of the piston 16 and the second opening 15 to the second side of the piston 16.
  • the second side is on the opposite side of the piston 16 in relation to the first side.
  • the piston 16 moves in the space 13 when the pressure difference between the first opening 14 and the second opening 15 changes.
  • the piston 16 comprises a first surface 17 limiting the space 13 on the side of the first opening 14 and a second surface 18 limiting the space 13 on the side of the second opening 15.
  • the first surface 17 and the second surface 18 limit the space 13 in the direction of the movement of the piston 16. Further, the area of the first surface 17 is smaller than that of the second surface 18.
  • Annular seals 19, 19' are arranged around the piston 16 for sealing the gap between the piston 16 and the body part 12.
  • the first seal 19 is arranged near the first surface 17 of the piston 16 and the second seal 19' is arranged near the second surface 18 of the piston 16.
  • the body part 12 further includes a drain opening 24 with a drain pipe 25 attached thereto, through which fuel and/or gas leaked past the seals 19, 19' to between the piston 16 and the body part 12 is drained from the space 13.
  • fuel is not transmitted past the piston 16 from the first side to the second side and gas is not transmitted past the piston 16 from the second side to the first side.
  • Pressurized gas is introduced into the gas pipe 20 from a gas source 22, such as a tank filled with pressurized gas.
  • the gas pipe 20 is provided with a non-return valve 21 allowing flow therethrough into the space 13 but preventing flow from the space 13.
  • the non-return valve 21 opens when the pressure on its inlet side, i.e. on the side of the gas source 22 is higher than on the outlet side, i.e. on the side of the space 13.
  • the gas pipe 20 includes a pressure regulation valve 23 that opens and allows flow therethough when the force caused by the pressure on the inlet side, i.e. in the gas pipe 20 is higher than the closing force of the pressure regulation valve 23.
  • the outlet side of the pressure regulation valve 23 is in lower pressure than the inlet side, such as in ambient pressure.
  • the pressure in the gas pipe 20 can be maintained at the desired level by means of the pressure regulation valve 23.
  • the pressure regulation valve 23 is a spring loaded valve, i.e. the closing force of the valve is formed by means of
  • the volume of the space 13 increases on the first side of the piston 16, thereby dampening the increase of pressure in the fuel pipe.
  • the piston 16 moves in the opposite direction.
  • the volume of the space 13 decreases on the first side of the piston, thereby compensating the decrease of the pressure in the fuel pipe. Because the area of the second surface 18 of the piston 16 is larger than the area of the first surface
  • the gas pressure on the second side of the piston 16 can be lower than the fuel pressure on the first side of the piston 16 for maintaining an equilibrium position of the piston 16.
  • the dampening properties of the dampener 1 1 can be changed by changing the pressure of the gas in the gas pipe 20.

Landscapes

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

Abstract

An arrangement for dampening the pressure vibration of a fuel feed system (1 ) of a piston engine, the arrangement comprising a vibration dampener (11) having a body part (12) inside which is a space (13) containing a movably arranged intermediate piece (16), a first opening (14) arranged to open in the space (13) on the first side of the intermediate piece (16) for connecting the space (13) with the fuel feed system (1 ), and a second opening (15) arranged to open into the space (13) on the second side of the intermediate piece (16), the second opening (15) being in flow connection with a gas source (22) comprising pressurized gas.

Description

ARRANGEMENT FOR DAMPENING THE PRESSURE VIBRATION OF A FUEL FEED SYSTEM OF A PISTON ENGINE
The present invention relates to an arrangement for dampening the pressure vibration of the fuel feed system of a piston engine.
In fuel feed systems of internal combustion engines injection pumps are used for introducing pressurized fuel into the cylinders via injector nozzles. The injection pump comprises a cylinder element having a reciprocating piston arranged in a pressure chamber thereof. The movement of the piston causes the increase of the pressure of the fuel. The cylinder element usually includes one or two inlet channels through which fuel is introduced from the low pressure side of the fuel feed system into a pressure plenum as the piston is in its bottom dead center. The piston moving upwards in the pressure plenum covers the fuel inlet channels and pressurized fuel flows from the pressure plenum to the high pressure pipe leading to the injector nozzle. The fuel flow to the injector nozzle stops as a screw-like cut in the piston moves to the inlet channel and uncovers the inlet channel, whereby fuel in high pressure is discharged via the inlet channel to the low pressure side of the fuel feed system. This, in turn, causes a pressure pulse on the low pressure side of the fuel feed system. Usually a number of injection pumps are in flow connection with the main fuel pipe of the low pressure side, whereby the pressure in the pipe will continuously vibrate as the engine is running.
In case the fuel pressure in the low pressure side of the fuel feed system is low, the pressure fluctuation caused by the operation of the injection pumps can cause cavitation in the pipes on the low pressure side. In the worst case cavitation can destroy the low pressure pipes in a short period of time. The cavitation problem is especially serious in engines using crude oil as fuel. Various dampeners, such as gas dampeners and mechanical dampeners, can be used for dampening the pressure vibration of the fuel feed system. A gas dampener comprises a gas space separated from the fuel feed system by means of a membrane. As the fuel pressure is changed, the membrane moves and the volume of the fuel space is changed, whereby the pressure vibration in the fuel feed system is dampened. The service life of such a dampener is limited, as the membrane can easily be broken, whereby the dampener is unusable.
A mechanical dampener comprises a piston or other intermediate piece arranged inside a space in the dampener. The space is in flow connection with the fuel feed system, whereby the piston moves and thus the volume of the fuel feed system is changed as the pressure fluctuates. The piston is supported by the dampener by means of at least one spring dampening the movement of the piston. The service life of this kind of mechanical dampener is limited by the durability of the springs.
The object of the invention is to produce an improved arrangement for dampening the pressure vibration of the fuel feed system of a piston engine.
The arrangement according to the invention for dampening the pressure vibration of the fuel feed system of a piston engine comprises a vibration dampener having a body part inside which is a space containing a movably arranged intermediate piece. The body part has a first opening arranged to open to the first side of the intermediate piece for connecting the space with the fuel feed system and a second opening arranged to open into the space on the other side of the intermediate piece, the opening being in flow connection with the source of pressurized gas.
More specifically, an arrangement according to the invention is characterized by what is stated in the characterizing part of claim 1.
Considerable advantages are achieved by means of the invention. In a dampener used in a dampening arrangement according to the invention there is no membrane separating air and fuel from each other and no mechanical spring, whereby the dampener can be produced to be reliable and durable. When needed, the dampening properties of the dampener can easily be adjusted by changing the gas pressure acting on the intermediate piece.
In one embodiment of the invention the intermediate piece comprises a first surface limiting the space in the part on the side of the first opening and a second surface limiting the space in the part on the side of the second opening. Further, the area of the first surface is larger than that of the second surface. Thus, the pressure of the gas applying a force on the intermediate piece can be smaller than the pressure of the fuel for maintaining an equilibrium of the intermediate piece. Due to the low pressure the load on the gas system is low, whereby the design of the system can be simple.
In the following, the invention is described in more detail with reference to the appended schematic drawings.
Figure 1 is an illustration of a part of a fuel feed system of an internal combustion engine, the system being provided with a pressure vibration dampener according to the invention.
Figure 2 illustrates the vibration dampener of figure 1 in a cross-sectional view.
Figure 1 is a schematic view of a part of a fuel feed system 1 of an internal combustion engine. The internal combustion engine is, for example, a large multi- cylinder diesel engine used in ships or power plants. For example, crude oil can be used as fuel. Fuel is fed from the fuel tank 2 with a fuel pump 3 in a relatively low pressure via the low pressure piping 4 to each injection pump 5. The low pressure piping 4 extends from the high pressure side of the fuel pump 3 to each injection pump 5. The low pressure piping 4 comprises a main line 6 from which a branch line 7 extends to each injection pump 5. Each injection pump 5 is connected to the injector nozzle 9 via high-pressure pipes 10. The injection pump 5 carries out the injection of fuel together with the injector nozzles 9. The injector pump increases the fuel pressure to such a level that a sufficient injection pressure is achieved at injector nozzles 9. The fuel feed system also includes low-pressure return channels 8 returning from each injection pump 5 back to the fuel tank 2. Fuel is directed from the injection pumps 5 back to the fuel tank 2 through return channels 8.
One or more pressure vibration dampener(s) 1 1 is arranged in the fuel feed system. By means of the vibration dampener the fuel pressure fluctuations occurring in the fuel feed system 1 are dampened. Pressure fluctuations are caused, for example, as the high-pressure fuel in the injection pumps 5 is discharged into the low-pressure piping 4 when the injection stops. Because a number of injection pumps 5 are in flow connection with the same main line 6, the pressure in the main line 6 vibrates rapidly. The vibration dampener 11 is arranged in connection with the low-pressure piping 4, for example. In the embodiment of figure 1 there are two dampeners 1 1 and they are arranged in the main line 6, preferably near the openings of the branch lines 7 leading to the injection pumps 5. Alternatively or additionally pressure vibration dampeners 1 1 can be installed in other places of the low pressure piping 4 or other places of the fuel system, such as in connection with the injection pump 5.
Figure 2 illustrates in more detail the vibration dampener 1 1 shown in figure 1. The dampener comprises a body part 12 delimiting a space 13 inside it. The body part 12 includes a first opening 14, by means of which the space 13 is in flow connection with the fuel pipes of the fuel feed system 1 , such as the main line 6. The body part 12 additionally includes a second opening 15 by means of which the space 13 is in flow connection with the gas pipe 20 containing pressurized gas, such as air. The pressure of the gas in gas pipe 20 is higher than the ambient pressure. The cross-sectional area of the space 13 on the side of the first opening 14 is smaller than on the side of the second opening 15. The space 13 includes an intermediate piece arranged to reciprocate, such as a piston 16. The first opening 14 opens on the first side of the piston 16 and the second opening 15 to the second side of the piston 16. The second side is on the opposite side of the piston 16 in relation to the first side. The piston 16 moves in the space 13 when the pressure difference between the first opening 14 and the second opening 15 changes.
The piston 16 comprises a first surface 17 limiting the space 13 on the side of the first opening 14 and a second surface 18 limiting the space 13 on the side of the second opening 15. The first surface 17 and the second surface 18 limit the space 13 in the direction of the movement of the piston 16. Further, the area of the first surface 17 is smaller than that of the second surface 18.
Annular seals 19, 19' are arranged around the piston 16 for sealing the gap between the piston 16 and the body part 12. The first seal 19 is arranged near the first surface 17 of the piston 16 and the second seal 19' is arranged near the second surface 18 of the piston 16. The body part 12 further includes a drain opening 24 with a drain pipe 25 attached thereto, through which fuel and/or gas leaked past the seals 19, 19' to between the piston 16 and the body part 12 is drained from the space 13. Thus, fuel is not transmitted past the piston 16 from the first side to the second side and gas is not transmitted past the piston 16 from the second side to the first side.
Pressurized gas is introduced into the gas pipe 20 from a gas source 22, such as a tank filled with pressurized gas. The gas pipe 20 is provided with a non-return valve 21 allowing flow therethrough into the space 13 but preventing flow from the space 13. The non-return valve 21 opens when the pressure on its inlet side, i.e. on the side of the gas source 22 is higher than on the outlet side, i.e. on the side of the space 13. The gas pipe 20 includes a pressure regulation valve 23 that opens and allows flow therethough when the force caused by the pressure on the inlet side, i.e. in the gas pipe 20 is higher than the closing force of the pressure regulation valve 23. The outlet side of the pressure regulation valve 23 is in lower pressure than the inlet side, such as in ambient pressure. The pressure in the gas pipe 20 can be maintained at the desired level by means of the pressure regulation valve 23. In an embodiment according to figure 2 the pressure regulation valve 23 is a spring loaded valve, i.e. the closing force of the valve is formed by means of a spring.
When the pressure of the fuel increases in the fuel pipe of the fuel system, into which pipe the space 13 is in flow connection through the first opening 14, the piston moves in the space 13 towards the second opening 15 and compresses the gas on the second side of the piston 16. As the non-return valve 21 prevents flow of gas therethrough, the pressure of the gas increases as the piston 16 moves and the increased gas pressure counteracts the movement of the piston
16. The volume of the space 13 increases on the first side of the piston 16, thereby dampening the increase of pressure in the fuel pipe. When the pressure in the fuel pipe decreases, the piston 16 moves in the opposite direction. Thus, the volume of the space 13 decreases on the first side of the piston, thereby compensating the decrease of the pressure in the fuel pipe. Because the area of the second surface 18 of the piston 16 is larger than the area of the first surface
17, the gas pressure on the second side of the piston 16 can be lower than the fuel pressure on the first side of the piston 16 for maintaining an equilibrium position of the piston 16. The dampening properties of the dampener 1 1 can be changed by changing the pressure of the gas in the gas pipe 20.

Claims

CLAIMS:
1. An arrangement for dampening the pressure vibration of a fuel feed system (1 ) of a piston engine, the arrangement comprising a vibration dampener (11 ) having a body part (12) inside which is a space (13) containing a movably arranged intermediate piece (16), a first opening (14) arranged to open in the space (13) on the first side of the intermediate piece (16) for connecting the space (13) with the fuel feed system (1 ), and a second opening (15) arranged to open into the space (13) on the second side of the intermediate piece (16), characterized in that the second opening (15) is in flow connection with a gas source (22) comprising pressurized gas.
2. An arrangement according to claim 1 , characterized in that the intermediate piece (16) comprises a first surface (17) limiting the space (13) on the side of the first opening (14) and a second surface (18) limiting the space (13) on the side of the second opening (15), and that the area of the first surface (17) is smaller than that of the second surface (18).
3. An arrangement according to claim 1 or 2, characterized in that a gas pipe (20) is arranged between the second opening (15) and the gas source (22), the pipe having a one-way valve (21 ) allowing flow therethough from the gas source (22) to the space (13), but preventing flow from the space (13) to the gas source (22).
4. An arrangement according to any of the previous claims, characterized in that a drain opening (24) is arranged in the body part (12) for removing fuel and/or gas leaked to between the body part (12) and the intermediate piece (16) from the space (13).
5. An arrangement according to any of the previous claims, characterized in that the gas pipe (20) is provided with a pressure regulation valve (23) for maintaining a desired gas pressure in the part of the gas pipe (20) between the pressure source (22) and the one-way valve (21 ).
6. An arrangement according to any of the previous claims, characterized in that a sealing arrangement (19, 19') is arranged on the circumference of the intermediate piece (16) for preventing transportation of fuel and/or gas to between the intermediate piece (16) and the body part (12).
7. An arrangement according to any of the previous claims, in which the fuel feed system (1 ) comprises injection pumps (5) for feeding fuel to the injector nozzles (9), a main line (6) for directing fuel in the feed system (1 ) and branch lines (7) arranged between the main line (6) and the injection pumps (5) for directing fuel from the main line (6) to the injection pumps (5), characterized in that a vibration dampener (1 1 ) is arranged in connection with the main line (6).
8. An arrangement according to any of the previous claims, characterized in that the vibration dampener (1 1 ) is arranged in connection with the injection pump (5).
.
EP06808043A 2005-12-22 2006-11-20 Arrangement for dampening the pressure vibration of a fuel feed system of a piston engine Active EP1963661B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20055688A FI120214B (en) 2005-12-22 2005-12-22 Arrangement for damping the vibration in a fuel feed system at a piston engine
PCT/FI2006/050502 WO2007071817A1 (en) 2005-12-22 2006-11-20 Arrangement for dampening the pressure vibration of a fuel feed system of a piston engine

Publications (3)

Publication Number Publication Date
EP1963661A1 true EP1963661A1 (en) 2008-09-03
EP1963661A4 EP1963661A4 (en) 2010-12-22
EP1963661B1 EP1963661B1 (en) 2012-03-14

Family

ID=35510766

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06808043A Active EP1963661B1 (en) 2005-12-22 2006-11-20 Arrangement for dampening the pressure vibration of a fuel feed system of a piston engine

Country Status (4)

Country Link
EP (1) EP1963661B1 (en)
AT (1) ATE549507T1 (en)
FI (1) FI120214B (en)
WO (1) WO2007071817A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010064185A1 (en) * 2010-12-27 2012-06-28 Robert Bosch Gmbh Fuel injection system for an internal combustion engine
DE102013206905A1 (en) * 2013-04-17 2014-10-23 Robert Bosch Gmbh Device for pulsation damping for a high-pressure pump

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4031239A1 (en) * 1990-10-04 1992-04-09 Kaltenberg Hans Georg Adjustable pressure pulse damper for piston pumps - has nitrogen@-filled damping vol. bounded by membrane at end of plunger with magnetic position feedback
DE19621897C1 (en) * 1996-05-31 1997-08-28 Man B & W Diesel Gmbh Extreme-pressure counterbalancing equipment, particularly for injection system of large diesel engine.
DE10350941A1 (en) * 2003-10-31 2005-06-02 Hydac Technology Gmbh Device for damping pressure surges

Also Published As

Publication number Publication date
ATE549507T1 (en) 2012-03-15
EP1963661B1 (en) 2012-03-14
FI20055688A0 (en) 2005-12-22
FI20055688L (en) 2007-06-23
FI120214B (en) 2009-07-31
WO2007071817A1 (en) 2007-06-28
EP1963661A4 (en) 2010-12-22

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