FI126707B - Fuel Supply System - Google Patents

Fuel Supply System Download PDF

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Publication number
FI126707B
FI126707B FI20145331A FI20145331A FI126707B FI 126707 B FI126707 B FI 126707B FI 20145331 A FI20145331 A FI 20145331A FI 20145331 A FI20145331 A FI 20145331A FI 126707 B FI126707 B FI 126707B
Authority
FI
Finland
Prior art keywords
pressure
valve
fuel supply
flushing
supply system
Prior art date
Application number
FI20145331A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI20145331A (en
Inventor
Wolfgang Wagner
Robert Strobel
Original Assignee
Man Diesel & Turbo Se
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Filing date
Publication date
Application filed by Man Diesel & Turbo Se filed Critical Man Diesel & Turbo Se
Publication of FI20145331A publication Critical patent/FI20145331A/en
Application granted granted Critical
Publication of FI126707B publication Critical patent/FI126707B/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/0275—Arrangement of common rails
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/08—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for non-gaseous fuels
    • F02M21/10—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for non-gaseous fuels for fuels with low melting point, e.g. apparatus having heating 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
    • 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
    • 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
    • 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
    • F02M37/007—Layout or arrangement of systems for feeding fuel characterised by its use in vehicles, in stationary plants or in small engines, e.g. hand held tools
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
    • F02M63/0007—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using electrically actuated valves
    • 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
    • F02M63/0012—Valves
    • 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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0049—Combined valve units, e.g. for controlling pumping chamber and injection valve
    • 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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/005—Pressure relief valves
    • 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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/005—Pressure relief valves
    • F02M63/0052—Pressure relief valves with means for adjusting the opening pressure, e.g. electrically controlled
    • 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
    • F02M63/0265—Pumps feeding common rails
    • F02M63/027—More than one high pressure pump feeding a single 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/0275—Arrangement of common rails
    • F02M63/0285—Arrangement of common rails having more than one common rail
    • F02M63/029—Arrangement of common rails having more than one common rail per cylinder bank, e.g. storing different fuels or fuels at different pressure levels per cylinder bank
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • 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
    • F02M2200/24—Fuel-injection apparatus with sensors
    • F02M2200/247—Pressure sensors
    • 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
    • F02M2200/24—Fuel-injection apparatus with sensors
    • F02M2200/248—Temperature sensors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Fuel-Injection Apparatus (AREA)

Description

Fuel supply system
The invention relates to a fuel supply system of an internal combustion engine according to the preamble of claim 1. The invention furthermore relates to an arrangement of an accumulator unit, a pressure limiting valve and a flushing valve of such a fuel supply system.
Fig. 1 shows the fundamental construction of a common rail fuel supply system of an internal combustion engine known from the prior art. This construction is known from DE 101 57 135 B4. Thus, the common rail fuel supply system of Fig. 1 comprises at least one injector 1 each for each cylinder of the internal combustion engine. By way of the injectors 1, fuel can be injected into each of the cylinders of the internal combustion engine. The common rail fuel supply system furthermore comprises a pumping device 3 comprising at least one low-pressure pump 5, at least one high-pressure pump 2 and a high-pressure pump accumulator unit 8 in order to deliver fuel from a low-pressure region 4 of the common rail fuel supply system into a high-pressure region 6 of the latter, wherein in the high-pressure region 6 between the pumping device 3 and the injectors 1 a pressure accumulator system 7 which is permanently under high pressure is provided. The pressure accumulator system 7 which is permanently under high pressure, which is also described as common rail, comprises multiple accumulator units 9. The accumulator units 9 are connected to the pumping device 3 and among themselves via high-pressure lines 10 which are permanently under high pressure. The pressure accumulator system 7, namely the accumulator units 9, are furthermore connected to the injectors 1 via high-pressure lines 11 which as a function of the injection cycle are under high pressure at times. The high-pressure lines 11 which are under high pressure at times depending on the injection cycle, which connect the injectors 1 with the accumulator units 9, are assigned switching valves 12, which feed fuel to the injectors 1 as a function of the injection cycle.
From DE 101 57 135 B4 it is known furthermore that one of the accumulator units 9 of the pressure accumulator system 7 is assigned a pressure limiting valve 13 and a flushing valve 14. In the case of fuel supply systems known from practice, the pressure limiting valve 13 and the flushing valve 14 are coupled on the one hand via high-pressure lines 15, 16 to the accumulator unit 9 and on the other hand via low-pressure lines 17, 18 to the low-pressure region 4 of the fuel supply system.
The piping of the pressure limiting valve 13 and the flushing valve 14 with the accumulator unit 9 via the high-pressure lines 15, 16 is disadvantageous, since because of this additional sealing points are created. Furthermore, the piping of the abovementioned components of the fuel supply system causes a confusing construction of the fuel supply system which requires a lot of installation space. The accessibility of the individual components of the fuel supply system is rendered more difficult through the piping.
Starting out from this, the present invention is based on the object of creating a new type of fuel supply system of an internal combustion engine and an arrangement of an accumulator unit, a pressure limiting valve and a flushing valve of such a fuel supply system.
This object is solved through a fuel supply system of an internal combustion engine according to claim 1.
According to the invention, the accumulator unit, with which the pressure limiting valve and the flushing valve interact, is assigned a valve block, which directly acts on the accumulator unit and which receives the pressure limiting valve and the flushing valve.
With the invention it is proposed that the accumulator unit, with which the pressure limiting valve and the flushing valve interact, is assigned a valve block which directly acts on the accumulator unit and which receives both the pressure limiting valve as well as the flushing valve. Because of this, high-pressure lines between the pressure limiting valve, the flushing valve and the accumulator unit of the pressure accumulator system of the fuel supply system can be omitted. Because of this, the number of the sealing points in the fuel supply system is reduced. Furthermore, the construction of the fuel supply system is simplified. The accessibility of the individual components of the fuel supply system is improved.
According to an advantageous further development, the valve block receives at least one pressure sensor, preferentially two redundantly operating pressure sensors. Preferentially, the valve block furthermore receives temperature sensors, namely a first temperature sensor interacting with the pressure limiting valve and a second temperature sensor interacting with the flushing valve. In particular, the valve block additionally receives leakage detection devices. By way of this, the construction of a fuel supply system can be further reduced. In particular when the or each pressure sensor and the temperature sensors are directly received by the valve block is the response behaviour of a control, which utilises the measurement values provided by the or each pressure sensor and the temperature sensors, improved.
According to an advantageous further development, the valve block comprises a high-pressure bore system, via which a storage volume of the accumulator unit is coupled to the pressure limiting valve, the flushing valve and the or each pressure sensor without piping. Preferentially, the valve block furthermore comprises a low-pressure bore system, via which the temperature sensors are coupled to the pressure limiting valve and to the flushing valve without piping. The low-pressure bore system is separated from the high-pressure bore system subject to the intermediate connection of the pressure limiting valve and the flushing valve.
This construction is particularly preferred. The high-pressure bore system and the low-pressure bore system of the valve block replace the piping via high-pressure lines and low-pressure lines required between the above-mentioned components according to the prior art.
In particular, the valve block comprises a leakage bore system, which is coupled to the leakage detection devices without piping, wherein the leakage bore system is separated from the low-pressure bore system and from the high-pressure bore system.
The arrangement according to the invention of an accumulator unit, a pressure limiting valve and a flushing valve for such a fuel supply system is defined in claim 10.
Preferred further developments of the invention are obtained from the subclaims and the following description. Exemplary embodiments of the invention are explained in more detail with the help of the drawing without being restricted to this. Here it shows:
Fig. 1: a diagram of a fuel supply system;
Fig. 2: details of a fuel supply system according to the invention.
The present invention relates to a fuel supply system, in particular to a common rail fuel supply system, of an internal combustion engine designed in particular as a large diesel engine or marine diesel engine. The fundamental structure of such a fuel supply system was already described making reference to Figure 1.
The present invention relates to details of the fuel supply system, with the help of which in the region of the accumulator unit 9, which interacts with the pressure limiting valve 13 and the flushing valve 14, the piping effort can be reduced. Details in this regard are described in the following making reference to Fig. 2.
Thus, Fig. 2 shows that the accumulator unit 9, which interacts with the pressure limiting valve 13 and the flushing valve 14, is assigned a valve block 19, wherein the accumulator unit 9 directly acts on the valve block 19, and wherein furthermore the valve block 19 receives or carries the pressure limiting valve 13 and the flushing valve 14.
Furthermore, the valve block 19 receives at least one pressure sensor 20, with the help of which the system pressure which is present in the storage volume of the accumulator unit 9 can be detected by measurement in order to control the operation of the pumping device 3 as a function of this system pressure. Preferentially, the valve block 19 receives two such pressure sensors 20, which redundantly detect the system pressure that is present in the storage volume of the accumulator unit 9.
To directly connect the accumulator unit 9 and the pressure limiting valve 13, the flushing valve 14 and the or each pressure sensor 20 to the valve block 19, the valve block 19 comprises a high-pressure bore system, via which the storage volume of the accumulator unit 9 can be coupled to the pressure limiting valve 13 and the flushing valve 14 and the or each pressure sensor 20 without piping.
Furthermore, the valve block 19 receives temperature sensors 21 and 22, namely a first temperature sensor 22 interacting with the pressure limiting valve 13 and a second temperature sensor 21 interacting with the flushing valve 14.
In particular when the pressure limiting valve 13 or the flushing valve 14 opens, can the opening of the respective valve 13, 14 be detected via the temperature sensor 21,22 interacting with the respective valve 13, 14.
In addition to the high-pressure bore system, the valve block 19 comprises a low-pressure bore system, via which the temperature sensors 21 and 22 are coupled to the pressure limiting valve 13 and the flushing valve 14 without piping in such a manner that the first temperature sensor 22 is positioned directly downstream of the pressure limiting valve 13 and the second temperature sensor 21 directly downstream of the flushing valve 14 in the low-pressure region.
The low-pressure bore system is separated from the high-pressure bore system subject to intermediate connection of the pressure limiting valve 13 and of the flushing valve 14.
The low-pressure bore system comprises a common drain 23 for fuel for the pressure limiting valve 13 and the flushing valve 14 to the low-pressure region 4 of the fuel supply system.
Furthermore, the valve block 19, which is assigned to the accumulator unit 9, receives leakage detection devices 24, for the purpose of which the valve block 19 in addition to the high-pressure bore system and the low-pressure bore system furthermore comprises a leakage bore system, which is coupled to the leakage detection devices 24 without piping.
The leakage bore system is separated from both the low-pressure bore system and also from the high-pressure bore system.
With the present invention, the construction of a fuel supply system, namely a common rail fuel supply system of a large diesel engine ora marine diesel engine can be substantially simplified.
Thus, the valve block 19, which directly receives the pressure limiting valve 13 and the flushing valve 14, can be directly coupled to the accumulator unit 9, namely to the storage volume of the latter. Because of this, high pressure lines between the valve block 19 and the accumulator unit 9 and high pressure lines, which lead to the valves 13 and 14, can be omitted.
Furthermore, the temperature sensors 21 and 22 are integrated in the valve block 19 or directly received by the latter. Because of this, fuel lines, which carry the fuel to the temperature sensors 21 and 22, can be omitted.
Furthermore, the leakage detection via the leakage detection devices 24 is preferentially also integrated in the valve block 19. This ensures a further simplification of the design structure of the fuel supply system.
The present invention furthermore relates to the arrangements from the accumulator unit 9, the valve block 19 and the valves 13 and 14 show in Fig. 2, wherein this arrangement preferentially furthermore includes the or each pressure sensor 20, the pressure sensors 21 and 22 as well as the leakage detection devices 24.
With the present invention, a lot of piping, which is required with fuel supply systems known from practice in order to couple the pressure limiting valve 13, the flushing valve 14, the or each pressure sensor 20 and temperature sensors 21, 22 to the accumulator unit 9, can be omitted.
This is achieved in that a multiplicity of functions is integrated in the valve block 19, which directly acts on the accumulator unit 9, which interacts with the above assemblies, namely the function of the valves 13 and 14, the function of the or each pressure sensor 20, the function of the temperature sensor 21 and 22 as well as the function of the leakage detection. Because of this, not only the number of sealing points in the fuel supply system is reduced, the additional components or the assemblies of the fuel supply system are also more easily accessible.
List of reference numbers 1 Injector 2 High-pressure pump 3 Pumping device 4 Low-pressure region 5 Low-pressure pump 6 High-pressure region 7 Pressure accumulator system 8 High-pressure pump accumulator unit 9 Accumulator unit 10 High-pressure line 11 High-pressure line 12 Switching valve 13 Pressure limiting valve 14 Flushing valve 15 High-pressure line 16 High-pressure line 17 Low-pressure line 18 Low-pressure line 19 Valve block 20 Pressure sensor 21 Temperature sensor 22 Temperature sensor 23 Drain 24 Leakage detection device

Claims (6)

1. Polttoaineensyöttölaitteisto, erityisesti laivadieselmoottoriksi muodostetun polttovoimakoneen yhteispainepolttoaineensyöttölaitteisto, jossa on matalapainealue (4), pumppulaite (3) polttoaineen syöttämiseksi matalapai-nealueelta (4) korkeapainealueelle (6), jolloin korkeapainealueelle (6) pumppu-laitteen (3) ja sylintereihin sovitettujen injektoreiden (1) välille on järjestetty pysyvästi korkeapaineen alainen paineakkujärjestelmä (7), jossa on korkeapaine-johdon (10) välityksellä kytkettyjä akkuyksiköitä (9), jolloin paineakkujärjestelmä (7) on kytketty vähintään yhden samoin korkeapaineen alaisena olevan painejohdon (10) välityksellä pumppulaitteeseen (3), jolloin paineakkujärjestelmä (7) on kytketty ruiskutustahdista ajoittain riippuvaisesti korkeapaineen alaisena olevien korkeapainejohtojen (11) välityksellä injektoreihin (1), ja jolloin paineakkujärjestelmän (7) yhden akkuyksikön (9) kanssa yhdessä toimii pai-neenrajoitusventtiili (13) ja huuhteluventtiili (14), t u n n e 11 u siitä, että akkuyk-sikkö (9), jonka kanssa paineenrajoitusventtiili ja huuhteluventtiili toimivat yhdessä, on järjestetty venttiililohkoon (19), joka on välittämässä kytkennnässä akkuyksikköön (9) ja sisältää paineenrajoitusventtiilin (13) ja huuhteluventtiilin (14), että venttiililohko (19) sisältää lisäksi ainakin yhden paineanturin (20), edullisesti kaksi redundanssimaisesti toimivaa paineanturia, että venttiililohko (19) sisältää lämpötila-anturit (21, 22) nimittäin paineenalennusventtiilin (13) kanssa yhteistoiminnassa olevan ensimmäisen lämpötila-anturin (22) ja huuhteluventtiilin (14) kanssa yhteistoiminnassa olevan toisen lämpötila-anturin (21), ja että venttiililohkossa (19) on matalapaineaukkojärjestelmä, jonka välityksellä lämpötila-anturit (21,22) on kytketty paineenalennusventtiiliin (13) ja huuhteluventtiiliin (14) siten, että ensimmäinen lämpötila-anturi (22) on sijoitettu matalapaine-aukkojärjestelmän alueella välittömästi paineenrajoitusventtiilin (13) jälkeen ja toinen lämpötila-anturi (21) välittömästi huuhteluventtiilin (14) jälkeen.A fuel supply apparatus, in particular a common rail fuel injection apparatus for a marine diesel engine, having a low pressure range (4), a pump device (3) for supplying fuel from a low pressure range (4) to a high pressure range (6), 1) is provided with a permanently high pressure accumulator system (7) having battery units (9) connected via a high pressure line (10), the pressure accumulator system (7) being connected to the pump device (3) via at least one similarly pressurized pressure line (10). wherein the pressure accumulator system (7) is connected to the injectors (1) from time to time via the high pressure lines (11) under high pressure depending on the injection rate, and wherein the pressure accumulator (13) and flushing co-operate with one accumulator (9) valve (14), feeling 11 u that the battery unit (9) with which the pressure relief valve and flushing valve cooperate is arranged in a valve block (19) communicating with the battery unit (9) and comprising a pressure relief valve (13) and flushing valve (13). 14) that the valve block (19) further comprises at least one pressure sensor (20), preferably two redundancy-acting pressure sensors, that the valve block (19) includes temperature sensors (21, 22), namely a first temperature sensor (20) cooperating with the pressure relief valve (13) 22) and a second temperature sensor (21) cooperating with the flushing valve (14), and that the valve block (19) has a low pressure port system through which the temperature sensors (21,22) are connected to the pressure relief valve (13) and flushing valve (14), that the first temperature sensor (22) is disposed in a low pressure orifice system and a second temperature sensor (21) immediately downstream of the purge valve (14). 2. Patenttivaatimuksen 1 mukainen polttoaineensyöttölaiteisto, tunnettu siitä, että venttiililohkossa (19) on korkeapaineaukkojärjestelämä, jonka välityksellä paineyksikön (9) tietty varausvolyymi on kytketty paineenrajoi-tusventtiiliin (13), huuhtaluventtiiliin (14) ja yhteen tai kuhunkin paineanturiin (20) putkettomasti.Fuel supply system according to Claim 1, characterized in that the valve block (19) has a high pressure orifice system through which a certain charge volume of the pressure unit (9) is connected to the pressure control valve (13), flush valve (14) and one or each pressure sensor. 3. Patenttivaatimuksen 1 tai 2 mukainen polttoaineensyöttölaitteisto, tunnettu siitä, että matalapaineaukkojärjestelmässä paineenalennusventtii-liä (13) ja huuhteluventtiiliä (14) varten on yhteinen poistoaukko (23) matalapai-nealueelle (4).Fuel supply system according to Claim 1 or 2, characterized in that the low pressure orifice system for the pressure relief valve (13) and the flushing valve (14) has a common outlet (23) for the low pressure area (4). 4. Jonkin patenttivaatimuksen 1 - 3 mukainen polttoaineensyöttölait-teisto, tunnettu siitä, että matalapaineaukkojärjestelmä on erotettu korkea-paineaukkojärjestelmästä paineenalennusventtiilin (13) ja huuhteluventtiilin (14) välikytkennällä.Fuel supply system according to one of Claims 1 to 3, characterized in that the low pressure orifice system is separated from the high pressure orifice system by an intermediate connection between the pressure relief valve (13) and the purge valve (14). 5. Jonkin patenttivaatimuksen 1 -4 mukainen polttoaineensyöttölait-teisto, tunnettu siitä, että venttiililohko (19) sisältää vuodontunnistuslaitteet (24).Fuel supply apparatus according to one of Claims 1 to 4, characterized in that the valve block (19) comprises leakage detection devices (24). 6. Patenttivaatimuksen 5 mukainen polttoaineensyöttölaitteisto, tunnettu siitä, että venttiililohko (19) sisältää vuodontunnistusjärjestelmän, joka on kytketty vuodontunnistuslaitteisiin (24) putkettomasti, jolloin vuotoauk-kojärjestelmä on erotettu matalapaineaukkojärjestelmästä ja korkeapaineaukko-järjestelmästä.Fuel supply system according to Claim 5, characterized in that the valve block (19) comprises a leak detection system which is connected to the leak detection devices (24) in a tubeless manner, the leakage system being separated from the low pressure orifice system and the high pressure orifice system.
FI20145331A 2013-04-12 2014-04-08 Fuel Supply System FI126707B (en)

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US10036314B2 (en) 2016-01-11 2018-07-31 Caterpillar Inc. Fuel system flush circuitry and method for operating the same

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JP2001207933A (en) * 2000-01-20 2001-08-03 Otics Corp Valve opening detecting device for relief valve for common rail and seal running out detecting device
DE10061873A1 (en) * 2000-12-12 2002-06-27 Orange Gmbh Fuel storage tube for fuel injection system for multi-cylinder internal combustion engine is variably composed of modules, each module having a connection for a high pressure pump
SE520210C2 (en) * 2001-10-10 2003-06-10 Volvo Lastvagnar Ab Combination valve for a fuel system for an internal combustion engine and such a fuel system
DE10157135B4 (en) 2001-11-21 2004-03-11 Man B & W Diesel Ag Fuel supply system in the form of a common rail system of an internal combustion engine with several cylinders
DE10206236B4 (en) * 2002-02-15 2019-06-19 Robert Bosch Gmbh Fuel injection device for an internal combustion engine
JP2004150316A (en) * 2002-10-29 2004-05-27 Denso Corp Accumulator fuel injection device
AT510464B1 (en) * 2010-09-27 2012-07-15 Bosch Gmbh Robert VALVE WITH PRESSURE LIMITING FUNCTION
AT512438B1 (en) * 2012-01-27 2015-09-15 Bosch Gmbh Robert VALVE BLOCK FOR A HIGH-PRESSURE MEMORY OF A COMMON-RAIL HEAVY-OIL INJECTION SYSTEM

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AT514107B1 (en) 2016-01-15
JP6486604B2 (en) 2019-03-20
FI20145331A (en) 2014-10-13
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DE102013006303A1 (en) 2014-10-16
AT514107A3 (en) 2015-01-15

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