EP2652328B1 - Pompe pour pomper un combustible, préférablement diesel, à partir d'un réservoir jusqu'à un moteur à combustion interne - Google Patents

Pompe pour pomper un combustible, préférablement diesel, à partir d'un réservoir jusqu'à un moteur à combustion interne Download PDF

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Publication number
EP2652328B1
EP2652328B1 EP11797236.4A EP11797236A EP2652328B1 EP 2652328 B1 EP2652328 B1 EP 2652328B1 EP 11797236 A EP11797236 A EP 11797236A EP 2652328 B1 EP2652328 B1 EP 2652328B1
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EP
European Patent Office
Prior art keywords
line
fuel
venturi pipe
pump unit
pump
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.)
Not-in-force
Application number
EP11797236.4A
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German (de)
English (en)
Other versions
EP2652328A1 (fr
Inventor
Salvatore Palmisano
Daniele De Gennaro
Nello Medoro
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication date
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Publication of EP2652328A1 publication Critical patent/EP2652328A1/fr
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Publication of EP2652328B1 publication Critical patent/EP2652328B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/225—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves with throttling valves or valves varying the pump inlet opening or the outlet opening
    • 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
    • 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
    • F02M37/02—Feeding by means of suction apparatus, e.g. by air flow through carburettors
    • 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
    • F02M37/02—Feeding by means of suction apparatus, e.g. by air flow through carburettors
    • F02M37/025—Feeding by means of a liquid fuel-driven jet 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
    • 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
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/18—Feeding by means of driven pumps characterised by provision of main and auxiliary pumps
    • 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
    • F02M37/20—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 characterised by means for preventing vapour lock
    • 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
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
    • F02M59/366—Valves being actuated electrically
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/447—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston means specially adapted to limit fuel delivery or to supply excess of fuel temporarily, e.g. for starting of the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/04—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
    • F02M59/06—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/08—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by two or more pumping elements with conjoint outlet or several pumping elements feeding one engine cylinder

Definitions

  • the present invention relates to a pump unit for feeding fuel, preferably diesel fuel, from a storage tank to an internal combustion engine.
  • fuel preferably diesel fuel
  • a pump unit according to the preamble of claim 1 is known from the document DE 101 54 133 C1 .
  • the pump unit comprises a pre-feed pump, a high-pressure pump and a hydraulic circuit.
  • the hydraulic circuit comprises, in turn, a first line for connecting together the storage tank and the pre-feed pump, a second line for connecting together the pre-feed pump and the high-pressure pump, a third line for connecting together the high-pressure pump and the internal combustion engine, a fourth line for connecting together the second line and the storage tank and a fifth line for connecting together the second and fourth lines.
  • the hydraulic circuit further comprises a Venturi pipe which defines part of the fourth line and communicates hydraulically with the fifth line.
  • the Venturi pipe comprises a first inlet for receiving the fuel from the fourth line, a second inlet for receiving the fuel from the fifth line and an outlet for the fuel in said fourth line.
  • the Venturi pipe needs to be fixed in a component of the pump unit.
  • the pump unit according to claim 1 has the advantage that it is simple and inexpensive to produce and that fuel is prevented from seeping into the second inlet passing between the Venturi pipe and the fourth line as the second inlet is formed downstream of the joining portion of the Venturi pipe.
  • 1 denotes, in its entirety, a pump unit for feeding fuel, in particular diesel fuel, from a storage tank 2 to an internal combustion engine 3, in the case in question a Diesel combustion engine comprising a fuel distribution manifold 4, commonly indicated by the term “common rail”, and a plurality of injectors 5 which are connected to the manifold 4 and designed to spray the fuel inside associated combustion chambers (not shown) of the said engine 3.
  • a Diesel combustion engine comprising a fuel distribution manifold 4, commonly indicated by the term “common rail”, and a plurality of injectors 5 which are connected to the manifold 4 and designed to spray the fuel inside associated combustion chambers (not shown) of the said engine 3.
  • the pump unit 1 comprises a high-pressure pump 6, in the case in question a piston pump, designed to feed the fuel to the engine 3, and a low-pressure or pre-feed pump 7, in the case in question a gear pump, designed to feed the fuel from the tank 2 to the pump 6.
  • the pump 6 comprises a pump body 8 with a given longitudinal axis 9, and a plurality of cylinders 10 (in the case in question two cylinders 10), which are formed in the pump body 8, are uniformly distributed around the axis 9 and have respective longitudinal axes substantially perpendicular to the said axis 9 and which are each engaged slidably by a respective piston 12.
  • the pistons 12 are displaced along the associated cylinders 10 by an actuating device 13 of the known type housed inside the pump body 8, with a reciprocating rectilinear movement, comprising an outward stroke for intake of the fuel into the associated cylinders 10 and a return stroke for compressing the fuel contained inside said associated cylinders 10.
  • the pump unit 1 also comprises a hydraulic circuit 14 for feeding the fuel, comprising, in turn, a first line 15 for connecting together the tank 2 and the pump 7, a second line 16, which connects together the pumps 6 and 7, extends through the pump body 8 in order to lubricate the actuating device 13, and is connected to each cylinder 10 via an associated intake valve 17, and a third line 18, which extends between the pump 6 and the manifold 4, and is connected to each cylinder 10 by means of an associated delivery valve 19.
  • a hydraulic circuit 14 for feeding the fuel comprising, in turn, a first line 15 for connecting together the tank 2 and the pump 7, a second line 16, which connects together the pumps 6 and 7, extends through the pump body 8 in order to lubricate the actuating device 13, and is connected to each cylinder 10 via an associated intake valve 17, and a third line 18, which extends between the pump 6 and the manifold 4, and is connected to each cylinder 10 by means of an associated delivery valve 19.
  • the line 16 is provided with a metering solenoid valve 20 which is mounted upstream of the valves 17 in a direction 21 of flow of the fuel along the sections 15, 16 and 18, is movable between a closed position and an open position, and is designed to control selectively the instantaneous flowrate of the fuel fed to the pump 6 depending on the values of a plurality of operating parameters of the engine 3.
  • a metering solenoid valve 20 which is mounted upstream of the valves 17 in a direction 21 of flow of the fuel along the sections 15, 16 and 18, is movable between a closed position and an open position, and is designed to control selectively the instantaneous flowrate of the fuel fed to the pump 6 depending on the values of a plurality of operating parameters of the engine 3.
  • the circuit 14 also comprises a fourth line 22 which extends between the manifold 4 and the tank 2 and is provided with a metering solenoid valve 23, which cooperates with the solenoid valve 20 so as to control selectively the flowrate of the fuel fed to the injectors 5 and allows discharging into the tank 2 of the fuel flow exceeding that required for the injectors 5.
  • the circuit 14 also has a fifth line 24, which connects the line 16 upstream of the solenoid valve 20 in the direction 21 to the line 22 and allows discharging, into the line 22 and therefore into the tank 2, of at least part of the fuel flow exceeding that fed through the said solenoid valve 20.
  • the line 24 has a given longitudinal axis 25, comprises a widened section 26 and a narrow section 27 connected together at an end-of-travel shoulder 28 at right angles to the axis 25 and is provided with an overflow valve 29.
  • the valve 29 has an inlet 29a for receiving the fuel from the line 24, a first outlet 29b for the fuel in the line 24 and a second outlet 29c for the fuel in a line 30 of the circuit 14 extending between the valve 29 and the line 15.
  • the valve 29 is also configured to open only the outlet 29b when the flowrate of the fuel fed along the line 24 is less than a given threshold value and to open the two outlets 29b and 29c when the flowrate of the fuel fed along the line 24 is at least equal to the threshold value itself.
  • the circuit 14 also comprises a Venturi pipe 31 which is mounted in the section 26 downstream of the valve 29 in a direction 32 of flow of the fuel along the line 24 and is provided with a central hole 33 which extends through the pipe 31 coaxially with respect to the axis 25 and comprises a frustoconical inlet portion 33a converging in the direction 32, a frustoconical outlet portion 33b diverging in the direction 32 and a cylindrical intermediate portion 33c extending between the portions 33a and 33b.
  • a Venturi pipe 31 which is mounted in the section 26 downstream of the valve 29 in a direction 32 of flow of the fuel along the line 24 and is provided with a central hole 33 which extends through the pipe 31 coaxially with respect to the axis 25 and comprises a frustoconical inlet portion 33a converging in the direction 32, a frustoconical outlet portion 33b diverging in the direction 32 and a cylindrical intermediate portion 33c extending between the portions 33a and 33b.
  • the pipe 31 also has a radial calibrated hole 34 which is formed in a middle point of the pipe 31 transversely with respect to the axis 25, communicates with the portion 33c of the hole 33 and also communicates with a further line 35 of the circuit 14 in turn connected to the line 16 downstream of the solenoid valve 20 in the direction 21.
  • the pipe 31 Since the pressure of the fuel in the portion 33c is relatively low and less than the pressure of the fuel in the line 35, the pipe 31 is able to take in the fuel flow which seeps through the solenoid valve 20 when said solenoid valve 20 is closed. Since the line 35 is always connected to the line 16 and to the hole 34 it should be pointed out that the pipe 31 also takes in part of the fuel flow fed through the solenoid valve 20 when the solenoid valve 20 is open and the hole 34 is configured to keep below a given threshold value the quantity of fuel taken in by the pipe 31 when the solenoid valve 20 is open.
  • the section 26 and the pipe 31 have respective joining portions 39 which are formed on the inner surface of the section 26 and on the outer surface of the pipe 31, respectively, and are joined together in a fluid-tight manner by means of respective gas threads 37.
  • the pipe 31 is screwed into the section 26 so as to be arranged in contact with the shoulder 28 and be joined in a fluid-tight manner to the shoulder 28 itself and has a polygonal hollow head 38 which is formed inside the hole 33 upstream of the portion 33a in the direction 32 and allows an Allen key (known and not shown) to screw/unscrew the pipe 31 into/from said line 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Claims (6)

  1. Unité de pompe pour délivrer du combustible, de préférence du combustible diesel, depuis un réservoir de stockage (2) jusqu'à un moteur à combustion interne (3), l'unité de pompe comprenant une pompe de préalimentation (7) ; une pompe haute pression (6) ; un circuit hydraulique (14) comprenant, séquentiellement, une première ligne (15) pour connecter l'un à l'autre le réservoir de stockage (2) et la pompe de préalimentation (7), une deuxième ligne (16) pour connecter l'une à l'autre la pompe de préalimentation (7) et la pompe haute pression (6), une troisième ligne (18) pour connecter l'un à l'autre la pompe haute pression (6) et le moteur à combustion interne (3), une quatrième ligne (24) pour connecter l'un à l'autre la deuxième ligne (16) et le réservoir de stockage (2) et une cinquième ligne (35) pour connecter l'une à l'autre la deuxième et la quatrième ligne (16, 24) ; et un tube de venturi (31) qui définit une partie de la quatrième ligne (24) et qui communique hydrauliquement avec la cinquième ligne (35) ; et caractérisée en ce que le tube de venturi (31) est vissé dans la quatrième ligne (24), en ce que la quatrième ligne (24) et le tube de venturi (31) comprennent des parties d'assemblage respectives (36) qui sont formées sur la surface interne de la quatrième ligne (24) et sur la surface externe du tube de venturi (31), respectivement, et qui sont assemblées l'une à l'autre de manière étanche aux fluides au moyen de filetages à gaz respectifs (37), en ce que le tube de venturi (31) comprend une première entrée (33a) pour recevoir le combustible provenant de la quatrième ligne (24), une deuxième entrée (34) pour recevoir le combustible provenant de la cinquième ligne (35) et une sortie (33b) pour le combustible dans ladite quatrième ligne (24) et en ce que la deuxième entrée (34) est formée en aval de la partie d'assemblage (36) du tube de venturi (31) dans une direction d'écoulement (32) du combustible le long de la quatrième ligne (24).
  2. Unité de pompe selon la revendication 1, dans laquelle le tube de venturi (31) est pourvu d'un trou central (33) qui s'étend à travers le tube de venturi (31), coaxialement par rapport à un axe longitudinal (25) de la quatrième ligne (24), de manière à définir la première entrée (33a) et la sortie (33b) ; la deuxième entrée (34) s'étendant radialement à travers le tube de venturi (31) de manière à communiquer hydrauliquement avec le trou central (33).
  3. Unité de pompe selon l'une quelconque des revendications précédentes, dans laquelle la quatrième ligne (24) comprend une partie élargie (26) et une partie étroite (27) qui sont agencées l'une après l'autre et qui sont connectées l'une à l'autre au niveau d'un épaulement de fin de course (28) qui est sensiblement à angle droit par rapport à un axe longitudinal (25) de ladite quatrième ligne (24) ; le tube de venturi (31) étant vissé dans ladite partie élargie (26) de manière à être agencé en contact avec ledit épaulement de fin de course (28) et à être assemblé de manière étanche aux fluides avec celui-ci.
  4. Unité de pompe selon l'une quelconque des revendications précédentes, dans laquelle le tube de venturi (31) présente une tête polygonale (38) prévue pour être mise en prise avec une clé fonctionnelle.
  5. Unité de pompe selon l'une quelconque des revendications précédentes, comprenant également une soupape de débordement (29) agencée le long de la quatrième ligne (24) en amont du tube de venturi (31) dans une direction d'écoulement (32) du combustible le long de ladite quatrième ligne (24).
  6. Unité de pompe selon l'une quelconque des revendications précédentes, dans laquelle le circuit hydraulique (14) comprend également une électrovanne de dosage (20) montée le long de la deuxième ligne (16) ; la quatrième ligne (24) et la cinquième ligne (35) étant connectées à la deuxième ligne (16) en amont et en aval, respectivement, de l'électrovanne de dosage (20) dans une direction d'écoulement (21) du combustible le long de ladite deuxième ligne (16).
EP11797236.4A 2010-12-16 2011-12-14 Pompe pour pomper un combustible, préférablement diesel, à partir d'un réservoir jusqu'à un moteur à combustion interne Not-in-force EP2652328B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2010A002310A IT1403264B1 (it) 2010-12-16 2010-12-16 Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, da un serbatoio di contenimento ad un motore a combustione interna
PCT/EP2011/072757 WO2012080334A1 (fr) 2010-12-16 2011-12-14 Unité de pompe pour fournir du carburant, de préférence du carburant diesel, d'un réservoir de stockage à un moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP2652328A1 EP2652328A1 (fr) 2013-10-23
EP2652328B1 true EP2652328B1 (fr) 2014-09-17

Family

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EP11797236.4A Not-in-force EP2652328B1 (fr) 2010-12-16 2011-12-14 Pompe pour pomper un combustible, préférablement diesel, à partir d'un réservoir jusqu'à un moteur à combustion interne

Country Status (7)

Country Link
EP (1) EP2652328B1 (fr)
JP (1) JP2014503737A (fr)
KR (1) KR20130141594A (fr)
CN (1) CN103261683B (fr)
IT (1) IT1403264B1 (fr)
RU (1) RU2013132614A (fr)
WO (1) WO2012080334A1 (fr)

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US20140174409A1 (en) * 2012-12-21 2014-06-26 United Techologies Corporation Gear Pump Protection Valve
ITMI20131923A1 (it) * 2013-11-20 2015-05-21 Bosch Gmbh Robert Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, da un serbatoio di contenimento ad un motore a combustione interna
DE102013226649A1 (de) * 2013-12-19 2015-06-25 Robert Bosch Gmbh Kraftstoffversorgungseinrichtung eines Kraftstoffeinspritzsystems einer Brennkraftmaschine sowie Überströmventil dazu
US10107244B2 (en) * 2014-10-09 2018-10-23 Robert Bosch Gmbh Pump unit for supplying fuel, preferably diesel oil, to an internal combustion engine
WO2016102138A1 (fr) * 2014-12-24 2016-06-30 Robert Bosch Gmbh Unité de pompe pour fournir un carburant, de préférence un carburant diesel, à un moteur à combustion interne
ITUA20162000A1 (it) * 2016-03-24 2017-09-24 Bosch Gmbh Robert Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna
IT201700042497A1 (it) * 2017-04-18 2018-10-18 Bosch Gmbh Robert Pompa di alta pressione per un impianto di alimentazione del carburante ad un motore a combustione interna; impianto di alimentazione di carburante e metodo per realizzare la pompa di alta pressione
FR3090752B1 (fr) * 2018-12-20 2021-03-05 Renault Sas Dispositif d’alimentation en carburant.
IT202000005620A1 (it) * 2020-03-17 2021-09-17 Vittorazi Motors S R L Sistema di controllo dell'iniezione di carburante per un motore a combustione interna provvisto di una linea di ritorno del carburante
IT202000005617A1 (it) * 2020-03-17 2021-09-17 Vittorazi Motors S R L Sistema e metodo di controllo dell'alimentazione del carburante per un motore a combustione interna

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DE29710159U1 (de) * 1997-06-11 1998-10-08 Robert Bosch Gmbh, 70469 Stuttgart Drosselelement
DE19956093B4 (de) * 1999-11-22 2005-03-31 Siemens Ag Kraftstoff-Fördereinrichtung für ein Common-Rail-Einspritzsystem
DE10139052B4 (de) * 2001-08-08 2004-09-02 Robert Bosch Gmbh Verfahren zum Betreiben einer Brennkraftmaschine, insbesondere mit Direkteinspritzung, Computerprogramm, Steuer- und/oder Regelgerät, sowie Kraftstoffsystem für eine Brennkraftmaschine
DE10154133C1 (de) * 2001-11-03 2003-02-13 Bosch Gmbh Robert Kraftstoffsystem
GB0209146D0 (en) * 2002-04-22 2002-05-29 Delphi Tech Inc Fuel pump
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FR2876981B1 (fr) * 2004-10-27 2006-12-15 Gaz Transp Et Technigaz Soc Pa Dispositif pour l'alimentation en combustible d'une installation de production d'energie d'un navire
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DE102009026715A1 (de) * 2009-06-04 2010-12-09 Robert Bosch Gmbh Kraftstoffhochdruckpumpe

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Publication number Publication date
WO2012080334A1 (fr) 2012-06-21
RU2013132614A (ru) 2015-01-27
ITMI20102310A1 (it) 2012-06-17
EP2652328A1 (fr) 2013-10-23
IT1403264B1 (it) 2013-10-17
JP2014503737A (ja) 2014-02-13
CN103261683B (zh) 2016-08-10
CN103261683A (zh) 2013-08-21
KR20130141594A (ko) 2013-12-26

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