ITUB20159726A1 - PUMPING GROUP FOR FUEL SUPPLEMENTATION, PREFERABLY GASOIL, TO AN INTERNAL COMBUSTION ENGINE - Google Patents
PUMPING GROUP FOR FUEL SUPPLEMENTATION, PREFERABLY GASOIL, TO AN INTERNAL COMBUSTION ENGINE Download PDFInfo
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- ITUB20159726A1 ITUB20159726A1 ITUB2015A009726A ITUB20159726A ITUB20159726A1 IT UB20159726 A1 ITUB20159726 A1 IT UB20159726A1 IT UB2015A009726 A ITUB2015A009726 A IT UB2015A009726A IT UB20159726 A ITUB20159726 A IT UB20159726A IT UB20159726 A1 ITUB20159726 A1 IT UB20159726A1
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- Prior art keywords
- support bearing
- pumping unit
- axis
- rotor
- unit according
- Prior art date
Links
- 239000000446 fuel Substances 0.000 title claims description 30
- 238000005086 pumping Methods 0.000 title claims description 24
- 238000002485 combustion reaction Methods 0.000 title claims description 12
- 230000009469 supplementation Effects 0.000 title 1
- 238000004804 winding Methods 0.000 claims description 8
- 239000002283 diesel fuel Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims 4
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/10—Outer members for co-operation with rotary pistons; Casings
-
- 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
- F02M37/041—Arrangements for driving gear-type 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
- F02M37/04—Feeding by means of driven pumps
- F02M37/08—Feeding by means of driven pumps electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
- F04C15/0023—Axial sealings for working fluid
- F04C15/0026—Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type machines or pumps, e.g. gear machines or pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
- F04C15/0034—Sealing arrangements in rotary-piston machines or pumps for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/082—Details specially related to intermeshing engagement type machines or pumps
- F04C2/086—Carter
-
- 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
- F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
-
- 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
- F02M59/10—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 the piston-drive
- F02M59/102—Mechanical drive, e.g. tappets or cams
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
- F04C11/005—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of dissimilar working principle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2210/00—Fluid
- F04C2210/10—Fluid working
- F04C2210/1044—Fuel
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
- Rotary Pumps (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
"GRUPPO DI POMPAGGIO PER ALIMENTARE COMBUSTIBILE, PREFERIBILMENTE GASOLIO, AD UN MOTORE A COMBUSTIONE INTERNA" "PUMPING GROUP TO FEED FUEL, PREFERABLY DIESEL, TO AN INTERNAL COMBUSTION ENGINE"
La presente invenzione è relativa ad un gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna. The present invention relates to a pumping unit for feeding fuel, preferably diesel fuel, to an internal combustion engine.
In particolare, la presente invenzione è relativa ad un gruppo di pompaggio del tipo comprendente una pompa di alta pressione, per esempio una pompa a pistoni, atta ad alimentare il combustibile ad un motore a combustione interna; ed una pompa di pre-alimentazione atta ad alimentare il combustibile da un serbatoio di contenimento alla pompa di alta pressione. In particular, the present invention relates to a pumping unit of the type comprising a high pressure pump, for example a piston pump, suitable for supplying fuel to an internal combustion engine; and a pre-feeding pump adapted to feed the fuel from a containment tank to the high pressure pump.
Il gruppo di pompaggio è provvisto, inoltre, di un circuito idraulico comprendente un primo ramo per collegare fra loro il serbatoio di contenimento e la pompa di prealimentazione, un secondo ramo per collegare fra loro la pompa di pre-alimentazione e la pompa di alta pressione, ed un terzo ramo per collegare fra loro la pompa di alta pressione ed il motore a combustione interna. The pumping group is also equipped with a hydraulic circuit comprising a first branch to connect the containment tank and the pre-supply pump together, a second branch to connect the pre-supply pump and the high pressure pump together. , and a third branch for connecting the high pressure pump and the internal combustion engine together.
La pompa di pre-alimentazione è una pompa ad ingranaggi ad azionamento elettrico provvista di una carcassa di contenimento comprendente un corpo pompa conformato a tazza ed un coperchio di chiusura del corpo pompa stesso. The pre-feed pump is an electrically operated gear pump provided with a containment casing comprising a cup-shaped pump body and a closing cover of the pump body itself.
La carcassa di contenimento alloggia al proprio interno un motore elettrico brushless sincrono a magneti permanenti comprendente uno statore di forma anulare, che presenta una pluralità di avvolgimenti in rame uniformemente distribuiti attorno ad un suo asse longitudinale, ed è provvisto di un connettore elettrico per 1'alimentazione degli avvolgimenti stessi. The containment casing houses inside a permanent magnet synchronous brushless electric motor comprising an annular stator, which has a plurality of copper windings uniformly distributed around its longitudinal axis, and is equipped with an electrical connector for 1 ' power supply of the windings themselves.
Il motore elettrico comprende, inoltre, un rotore di forma anulare, che è impegnato in maniera girevole nello statore tramite 1'interposizione di un cuscinetto di supporto, ed è montato per ruotare attorno ad un asse di rotazione coincidente con l'asse longitudinale dello statore stesso. The electric motor also comprises an annular rotor, which is rotatably engaged in the stator by means of the interposition of a support bearing, and is mounted to rotate around an axis of rotation coincident with the longitudinal axis of the stator. same.
Il rotore presenta una dentatura interna, e definisce un ingranaggio esterno della pompa ad ingranaggi, la quale comprende, inoltre, un ingranaggio interno di forma anulare alloggiato all'interno del rotore. The rotor has an internal toothing, and defines an external gear of the gear pump, which also comprises an internal ring-shaped gear housed inside the rotor.
L'ingranaggio interno è montato per ruotare attorno ad un asse di rotazione eccentrico rispetto all'asse di rotazione del rotore, e presenta una dentatura esterna accoppiata con la dentatura interna del rotore stesso. The internal gear is mounted to rotate around an axis of rotation eccentric with respect to the axis of rotation of the rotor, and has an external toothing coupled with the internal toothing of the rotor itself.
Le due dentature sono conformate in modo da definire una pluralità di camere a volume variabile, che sono distribuite attorno all'asse di rotazione del rotore, e sono accoppiate a tenuta di fluido fra loro. The two teeth are shaped in such a way as to define a plurality of variable volume chambers, which are distributed around the rotation axis of the rotor, and are coupled together in a fluid-tight manner.
A seguito della rotazione dell'ingranaggio esterno e dell'ingranaggio interno attorno ai relativi assi di rotazione, ciascuna camera a volume variabile viene collegata idraulicamente in successione in primo luogo con un ingresso del combustibile nella pompa ad ingranaggi e quindi con una uscita del combustibile dalla pompa ad ingranaggi stessa. As a result of the rotation of the external gear and the internal gear around their axes of rotation, each variable volume chamber is connected hydraulically in succession first with a fuel inlet in the gear pump and then with a fuel outlet from the gear pump itself.
Il rotore comprende, inoltre, una pluralità di tasche, che sono configurate per alloggiare al proprio interno, ciascuna, un rispettivo magnete permanente, e sono distribuite attorno all'asse di rotazione del rotore stesso. The rotor also comprises a plurality of pockets, which are each configured to house a respective permanent magnet inside it, and are distributed around the rotation axis of the rotor itself.
Generalmente, per isolare elettricamente lo statore e, quindi, gli avvolgimenti ed il connettore elettrico dal combustibile, lo statore viene completamente rivestito con uno strato di materiale plastico isolante. Generally, to electrically isolate the stator and, therefore, the windings and the electrical connector from the fuel, the stator is completely covered with a layer of insulating plastic material.
I gruppi di pompaggio noti del tipo sopra descritto presentano alcuni inconvenienti principalmente discendenti dal fatto che il rivestimento dello statore con il citato strato di materiale plastico isolante è relativamente costoso, è di difficile realizzazione, e presenta una affidabilità relativamente ridotta in quanto incapace di garantire un corretto isolamento dello statore alle condizioni operative di pressione e temperatura cui è soggetta la pompa ad ingranaggi. The known pumping units of the type described above have some drawbacks mainly deriving from the fact that the coating of the stator with the aforementioned layer of insulating plastic material is relatively expensive, is difficult to manufacture, and has a relatively low reliability as it is unable to guarantee a correct insulation of the stator at the operating conditions of pressure and temperature to which the gear pump is subject.
Scopo della presente invenzione è di realizzare un gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna che sia esente dagli inconvenienti sopra descritti e che sia di semplice ed economica attuazione. The object of the present invention is to provide a pumping unit for supplying fuel, preferably diesel oil, to an internal combustion engine which is free from the drawbacks described above and which is simple and economical to implement.
Secondo la presente invenzione viene realizzato un gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna come rivendicato nelle rivendicazioni allegate, According to the present invention, a pumping unit is provided to feed fuel, preferably diesel oil, to an internal combustion engine as claimed in the attached claims,
La presente invenzione verrà ora descritta con riferimento ai disegni annessi, che ne illustrano un esempio di attuazione non limitativo, in cui: The present invention will now be described with reference to the attached drawings, which illustrate a non-limiting example of embodiment, in which:
la figura 1 è uno schema idraulico di una preferita forma di attuazione del gruppo di pompaggio della presente invenzione; Figure 1 is a hydraulic diagram of a preferred embodiment of the pumping unit of the present invention;
la figura 2 è una vista prospettica esplosa di un particolare del gruppo di pompaggio della figura 1; Figure 2 is an exploded perspective view of a detail of the pumping unit of Figure 1;
la figura 3 è una sezione longitudinale del particolare della figura 3; e figure 3 is a longitudinal section of the detail of figure 3; And
la figura 4 è una vista frontale di un particolare delle figure 2 e 3. Figure 4 is a front view of a detail of Figures 2 and 3.
Con riferimento alla figura 1, con 1 è indicato, nel suo complesso, un gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, da un serbatoio 2 di contenimento ad un motore 3 a combustione interna, nella fattispecie un motore a scoppio Diesel comprendente un collettore 4 di distribuzione del combustibile, comunemente indicato con il termine di ''common rail", ed una pluralità di iniettori 5 collegati con il collettore 4 ed atti a nebulizzare il combustibile all'interno di relative camere di combustione (non illustrate) del motore 3 stesso. With reference to Figure 1, the number 1 indicates, as a whole, a pumping unit for feeding fuel, preferably diesel, from a containment tank 2 to an internal combustion engine 3, in this case a Diesel combustion engine comprising a manifold 4 for the distribution of the fuel, commonly indicated with the term '' common rail ", and a plurality of injectors 5 connected to the manifold 4 and adapted to atomize the fuel inside the relative combustion chambers (not shown) of the engine 3 same.
Il gruppo di pompaggio 1 comprende una pompa 6 di alta pressione, nella fattispecie una pompa a pistoni, atta ad alimentare il combustibile al motore 3, ed una pompa 7 di bassa pressione o pre-alimentazione atta ad alimentare il combustibile dal serbatoio 2 alla pompa 6. The pumping unit 1 comprises a high pressure pump 6, in this case a piston pump, suitable for supplying fuel to the engine 3, and a low pressure or pre-feeding pump 7 suitable for supplying the fuel from the tank 2 to the pump. 6.
La pompa 6 comprende una pluralità di cilindri 8 (nella fattispecie due cilindri 8), i quali sono ricavati in un corpo pompa 9, e sono impegnati in maniera scorrevole, ciascuno, da un rispettivo pistone 10. The pump 6 comprises a plurality of cylinders 8 (in this case two cylinders 8), which are formed in a pump body 9, and are each engaged in a sliding manner by a respective piston 10.
I pistoni 10 vengono spostati lungo i relativi cilindri 8 da un dispositivo 11 di azionamento di tipo noto alloggiato all'interno del corpo pompa 9 con un moto rettilineo alternativo comprendente una corsa di andata di aspirazione del combustibile nei relativi cilindri 8 ed una corsa di ritorno di compressione del combustibile contenuto nei relativi cilindri 8 stessi. The pistons 10 are moved along the relative cylinders 8 by an actuation device 11 of a known type housed inside the pump body 9 with a reciprocating rectilinear motion comprising a forward stroke for the intake of the fuel in the relative cylinders 8 and a return stroke compression of the fuel contained in the relative cylinders 8 themselves.
Il gruppo di pompaggio 1 comprende, inoltre, un circuito 12 idraulico di alimentazione del combustibile comprendente, a sua volta, un primo ramo 13 per collegare fra loro il serbatoio 2 e la pompa 7; un secondo ramo 14, il quale collega fra loro le pompe 6 e 7, si estende attraverso il corpo pompa 9 per lubrificare il dispositivo 11 di azionamento, ed è collegato a ciascun cilindro 8 attraverso una relativa valvola 15 di aspirazione; ed un terzo ramo 16, che si estende tra la pompa 6 ed il collettore 4, ed è collegato a ciascun cilindro 8 attraverso una relativa valvola 17 di mandata. The pumping unit 1 also comprises a hydraulic fuel supply circuit 12 comprising, in turn, a first branch 13 for connecting the tank 2 and the pump 7 together; a second branch 14, which connects the pumps 6 and 7 together, extends through the pump body 9 to lubricate the actuation device 11, and is connected to each cylinder 8 through a relative intake valve 15; and a third branch 16, which extends between the pump 6 and the manifold 4, and is connected to each cylinder 8 through a relative delivery valve 17.
Il ramo 14 è provvisto di un dispositivo 18 di filtraggio del combustibile alimentato alla pompa 6, e di una elettrovalvola 19 di dosaggio, la quale è montata a monte delle valvole 15 in una direzione 20 di avanzamento del combustibile lungo i rami 13, 14, e 16, ed è mobile tra una posizione di chiusura ed una posizione di apertura per controllare selettivamente la portata istantanea di combustibile alimentata alla pompa 6 in funzione dei valori di una pluralità di parametri di funzionamento del motore 3. The branch 14 is provided with a device 18 for filtering the fuel fed to the pump 6, and with a metering solenoid valve 19, which is mounted upstream of the valves 15 in a direction 20 of advancement of the fuel along the branches 13, 14, and 16, and is movable between a closed position and an open position to selectively control the instantaneous flow rate of fuel supplied to the pump 6 as a function of the values of a plurality of operating parameters of the engine 3.
Il circuito 12 comprende, inoltre, un quarto ramo 21, il quale si estende tra il collettore 4 ed il serbatoio 2, ed è provvisto di una elettrovalvola 22 di dosaggio, che coopera con l'elettrovalvola 19 per controllare selettivamente la portata di combustibile alimentata agli iniettori 5, e consente di scaricare nel serbatoio 2 la portata di combustibile eccedente quella necessaria agli iniettori 5. The circuit 12 also comprises a fourth branch 21, which extends between the manifold 4 and the tank 2, and is provided with a dosing solenoid valve 22, which cooperates with the solenoid valve 19 to selectively control the flow of fuel supplied. to the injectors 5, and allows the fuel flow in the tank 2 to be discharged in excess of that required by the injectors 5.
Secondo quanto illustrato nelle figure 2 e 3, la pompa 7 è una pompa ad ingranaggi ad azionamento elettrico provvista di una carcassa 23 di contenimento comprendente un corpo pompa 24, il quale presenta una forma a tazza, è limitato da una parete 25 di fondo e da una faccia 26 libera di estremità opposte una all'altra e parallele fra loro, ed è chiuso da un coperchio 27 disposto a contatto della faccia 26 stessa. According to what is illustrated in Figures 2 and 3, the pump 7 is an electrically operated gear pump provided with a containment casing 23 comprising a pump body 24, which has a cup shape, is limited by a bottom wall 25 and from a free face 26 with ends opposite one another and parallel to each other, and is closed by a cover 27 arranged in contact with the face 26 itself.
La carcassa 23 alloggia al proprio interno un motore 28 elettrico brushless sincrono a magneti permanenti comprendente uno statore 29 di forma anulare, il quale presenta un asse 30 longitudinale perpendicolare alla parete 25 ed alla faccia 26, è provvisto di una pluralità di avvolgimenti 31 in rame uniformemente distribuiti attorno all'asse 30, ed è provvisto di un connettore 32 elettrico per l'alimentazione degli avvolgimenti 31 stessi. The casing 23 houses inside a permanent magnet synchronous brushless electric motor 28 comprising an annular stator 29, which has a longitudinal axis 30 perpendicular to the wall 25 and to the face 26, is provided with a plurality of copper windings 31 uniformly distributed around the axis 30, and is provided with an electrical connector 32 for feeding the windings 31 themselves.
Lo statore 29 è impegnato in maniera girevole da un rotore 33 di forma anulare, il quale è montato coassialmente all'asse 30, presenta una dentatura 34 interna, e definisce un ingranaggio esterno della pompa 7. The stator 29 is rotatably engaged by an annular rotor 33, which is mounted coaxially to the axis 30, has an internal toothing 34, and defines an external gear of the pump 7.
La pompa 7 comprende, inoltre, un ingranaggio 35 interno di forma anulare, il quale è alloggiato all'interno del rotore 33, è montato per ruotare attorno ad un asse 36 di rotazione parallelo al, e distinto dal, citato asse 30, e presenta una dentatura 37 esterna accoppiata con la dentatura 34 interna del rotore 33, The pump 7 also comprises an internal annular gear 35, which is housed inside the rotor 33, is mounted to rotate around a rotation axis 36 parallel to and distinct from the aforementioned axis 30, and has an external toothing 37 coupled with the internal toothing 34 of the rotor 33,
Con riferimento alla figura 4, le due dentature 34, 37 sono conformate in modo da definire una pluralità di camere 38 a volume variabile, le quali sono distribuite attorno all'asse 30, e sono accoppiate a tenuta di fluido fra loro. With reference to Figure 4, the two toothings 34, 37 are shaped so as to define a plurality of chambers 38 with variable volume, which are distributed around the axis 30, and are coupled together in a fluid-tight manner.
A seguito della rotazione del rotore 33 e dell'ingranaggio 35 attorno ai relativi assi 30, 36, ciascuna camera 38 viene collegata idraulicamente in successione in primo luogo con un ingresso 39 del combustibile nella pompa 7 e quindi con una uscita 40 del combustibile dalla pompa 7 stessa. As a result of the rotation of the rotor 33 and of the gear 35 about the relative axes 30, 36, each chamber 38 is connected hydraulically in succession firstly with a fuel inlet 39 in the pump 7 and then with a fuel outlet 40 from the pump. 7 itself.
A proposito di quanto sopra esposto è opportuno precisare che il volume delle camere 38 associate all'ingresso 39 aumenta in una direzione 41 di rotazione del rotore 33 attorno all'asse 30 e dell'ingranaggio 35 attorno all'asse 36 e che il volume delle camere 38 associate all'uscita 40 diminuisce nella direzione 41 in modo da comprimere il combustibile in esse contenuto. With regard to the above it should be noted that the volume of the chambers 38 associated with the inlet 39 increases in a direction 41 of rotation of the rotor 33 around the axis 30 and of the gear 35 around the axis 36 and that the volume of the chambers 38 associated with outlet 40 decrease in direction 41 so as to compress the fuel contained therein.
Il rotore 33 è accoppiato in maniera girevole allo statore 29 tramite l'interposizione di un cuscinetto 42 di supporto di forma cilindrica, il quale è realizzato in materiale plastico, e si estende tra la parete 25 ed il coperchio 27. The rotor 33 is rotatably coupled to the stator 29 through the interposition of a cylindrical support bearing 42, which is made of plastic material, and extends between the wall 25 and the cover 27.
Il cuscinetto 42 è bloccato assialmente contro la parete 25 dal coperchio 27, ed è calzato su un blocco 43 di centraggio, il quale sporge dalla parete 25 verso il coperchio 27 coassialmente all'asse 30, presenta un diametro sostanzialmente pari al diametro del cuscinetto 42, ed è provvisto di un perno 44 di estremità impegnato attraverso l'ingranaggio 35 coassialmente all'asse 36. The bearing 42 is axially blocked against the wall 25 by the cover 27, and is fitted on a centering block 43, which protrudes from the wall 25 towards the cover 27 coaxially to the axis 30, has a diameter substantially equal to the diameter of the bearing 42 , and is provided with an end pin 44 engaged through the gear 35 coaxially with the axis 36.
Il cuscinetto 42 presenta una pluralità di nervature 45 di irrigidimento, le quali sono ricavate su una superficie esterna del cuscinetto 42, sono uniformemente distribuite attorno all'asse 30, e si estendono, ciascuna, tra due rispettivi avvolgimenti 31 fra loro adiacenti per bloccare angolarmente il cuscinetto 42 attorno all'asse 30 stesso. The bearing 42 has a plurality of stiffening ribs 45, which are formed on an external surface of the bearing 42, are uniformly distributed around the axis 30, and each extend between two respective windings 31 adjacent to each other to lock angularly the bearing 42 around the axis 30 itself.
Il cuscinetto 42 sporge assialmente dal rotore 33, e presenta una flangia 46 anulare, la quale sporge radialmente verso l'interno dalla parete laterale del cuscinetto 42, si estende tra il coperchio 27 ed il rotore 33 perpendicolarmente all' asse 30 , e definisce una apertura atta a ricevere un codolo 47 di centraggio del coperchio 27 . The bearing 42 projects axially from the rotor 33, and has an annular flange 46, which projects radially inwards from the side wall of the bearing 42, extends between the cover 27 and the rotor 33 perpendicular to the axis 30, and defines a opening adapted to receive a centering tang 47 of the cover 27.
Il cuscinetto 42 è accoppiato a tenuta di fluido con il blocco 43 tramite una guarnizione 48 anulare, la quale si estende coassialmente all' asse 30 , ed è montata tra una superficie esterna del blocco 43 ed una superficie interna del cuscinetto 42 , vale a dire tra due superfici parallele all' asse 30 stesso . The bearing 42 is fluid-tight coupled with the block 43 by means of an annular gasket 48, which extends coaxially to the axis 30, and is mounted between an external surface of the block 43 and an internal surface of the bearing 42, i.e. between two surfaces parallel to the axis 30 itself.
Il cuscinetto 42 è accoppiato a tenuta di fluido con il coperchio 27 tramite una guarnizione 49 anulare, la quale si estende coassialmente all' asse 30 , ed è montata tra il coperchio 27 e la flangia 46, vale a dire tra due superfici perpendicolari all' asse 30 stesso . The bearing 42 is coupled in a fluid-tight manner to the cover 27 by means of an annular gasket 49, which extends coaxially to the axis 30, and is mounted between the cover 27 and the flange 46, i.e. between two surfaces perpendicular to the axis 30 itself.
Secondo una variante non illustrata, la flangia 46 viene eliminata e la guarnizione 49 viene montata tra una superficie esterna del coperchio 27 ed una superficie interna del cuscinetto 42 , vale a dire tra due superfici parallele all' asse 30 . According to a variant not shown, the flange 46 is eliminated and the gasket 49 is mounted between an external surface of the cover 27 and an internal surface of the bearing 42, that is, between two surfaces parallel to the axis 30.
Le guarnizioni 48 e 49 garantiscono un corretto isolamento dello statore 29 dal combustibile contenuto nelle camere 38 a volume variabile alle condizioni operative di pressione e temperatura cui è soggetta la pompa 7 e presentano, quindi, una affidabilità relativamente elevata. The gaskets 48 and 49 ensure correct isolation of the stator 29 from the fuel contained in the variable volume chambers 38 at the operating conditions of pressure and temperature to which the pump 7 is subjected and therefore have a relatively high reliability.
Claims (1)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITUB2015A009726A ITUB20159726A1 (en) | 2015-12-22 | 2015-12-22 | PUMPING GROUP FOR FUEL SUPPLEMENTATION, PREFERABLY GASOIL, TO AN INTERNAL COMBUSTION ENGINE |
| EP16815567.9A EP3394417A1 (en) | 2015-12-22 | 2016-12-12 | Pumping assembly to feed fuel, preferably diesel fuel, to an internal combustion engine |
| CN201680080146.9A CN108603469B (en) | 2015-12-22 | 2016-12-12 | Pumping assembly for feeding fuel, preferably diesel fuel, to an internal combustion engine |
| PCT/EP2016/080587 WO2017108470A1 (en) | 2015-12-22 | 2016-12-12 | Pumping assembly to feed fuel, preferably diesel fuel, to an internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITUB2015A009726A ITUB20159726A1 (en) | 2015-12-22 | 2015-12-22 | PUMPING GROUP FOR FUEL SUPPLEMENTATION, PREFERABLY GASOIL, TO AN INTERNAL COMBUSTION ENGINE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ITUB20159726A1 true ITUB20159726A1 (en) | 2017-06-22 |
Family
ID=55699710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ITUB2015A009726A ITUB20159726A1 (en) | 2015-12-22 | 2015-12-22 | PUMPING GROUP FOR FUEL SUPPLEMENTATION, PREFERABLY GASOIL, TO AN INTERNAL COMBUSTION ENGINE |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3394417A1 (en) |
| CN (1) | CN108603469B (en) |
| IT (1) | ITUB20159726A1 (en) |
| WO (1) | WO2017108470A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4227534A4 (en) * | 2020-10-06 | 2024-04-03 | LG Innotek Co., Ltd. | Electric pump |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11466649B2 (en) | 2017-12-13 | 2022-10-11 | Robert Bosch Gmbh | Pumping unit for feeding fuel, preferably diesel fuel, to an internal combustion engine |
| IT201800004043A1 (en) * | 2018-03-28 | 2019-09-28 | Bosch Gmbh Robert | PUMPING GROUP TO FEED FUEL, PREFERABLY DIESEL, TO AN INTERNAL COMBUSTION ENGINE |
| IT201900017294A1 (en) * | 2019-09-27 | 2021-03-27 | Bosch Gmbh Robert | MODULAR GEAR PUMP FOR A FUEL PUMP ASSEMBLY TO AN INTERNAL COMBUSTION ENGINE |
| WO2022189415A1 (en) * | 2021-03-10 | 2022-09-15 | Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg | Electric oil pump for a motor vehicle |
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| DE102006007554A1 (en) * | 2006-02-16 | 2007-08-23 | Hydraulik-Ring Gmbh | Feed pump for a urea solution, to treat heavy vehicle motor exhaust gases, is an electromotor with an integrated gear pump of two meshing cogwheels rotated by a magnetic field |
| DE102006025182A1 (en) * | 2006-05-30 | 2007-12-06 | Trw Automotive Gmbh | Gear pump, in particular for a power steering |
| WO2009019185A1 (en) * | 2007-08-03 | 2009-02-12 | Luigi Carlo Arienti | A working process for obtaining a pack clearance in pumps and hydraulic rotary volumetric motors |
| US20120177518A1 (en) * | 2011-01-06 | 2012-07-12 | Eaton Corporation | Semi-plugged star gerotor and method of assembling the same |
| DE102011107157A1 (en) * | 2011-07-14 | 2013-01-17 | Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt | Annular gear pump |
| DE102011086435A1 (en) * | 2011-11-16 | 2013-05-16 | Robert Bosch Gmbh | Gear pump for conveying fluid, and for use in high-pressure injection system for internal combustion engine, particularly for motor vehicle, has pressure porting opening for discharging fluid to be conveyed from working chamber |
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|---|---|---|---|---|
| US4451217A (en) * | 1979-04-12 | 1984-05-29 | White Harvey C | Rotary fluid pressure device |
| JPH11241659A (en) * | 1998-02-25 | 1999-09-07 | Mitsubishi Electric Corp | Fuel supply device |
| US7044111B2 (en) * | 2003-08-07 | 2006-05-16 | Siemens Vdo Automotive Inc. | Purge valve having permanent magnet armature |
-
2015
- 2015-12-22 IT ITUB2015A009726A patent/ITUB20159726A1/en unknown
-
2016
- 2016-12-12 WO PCT/EP2016/080587 patent/WO2017108470A1/en active Application Filing
- 2016-12-12 EP EP16815567.9A patent/EP3394417A1/en not_active Withdrawn
- 2016-12-12 CN CN201680080146.9A patent/CN108603469B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006007554A1 (en) * | 2006-02-16 | 2007-08-23 | Hydraulik-Ring Gmbh | Feed pump for a urea solution, to treat heavy vehicle motor exhaust gases, is an electromotor with an integrated gear pump of two meshing cogwheels rotated by a magnetic field |
| DE102006025182A1 (en) * | 2006-05-30 | 2007-12-06 | Trw Automotive Gmbh | Gear pump, in particular for a power steering |
| WO2009019185A1 (en) * | 2007-08-03 | 2009-02-12 | Luigi Carlo Arienti | A working process for obtaining a pack clearance in pumps and hydraulic rotary volumetric motors |
| US20120177518A1 (en) * | 2011-01-06 | 2012-07-12 | Eaton Corporation | Semi-plugged star gerotor and method of assembling the same |
| DE102011107157A1 (en) * | 2011-07-14 | 2013-01-17 | Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt | Annular gear pump |
| DE102011086435A1 (en) * | 2011-11-16 | 2013-05-16 | Robert Bosch Gmbh | Gear pump for conveying fluid, and for use in high-pressure injection system for internal combustion engine, particularly for motor vehicle, has pressure porting opening for discharging fluid to be conveyed from working chamber |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4227534A4 (en) * | 2020-10-06 | 2024-04-03 | LG Innotek Co., Ltd. | Electric pump |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3394417A1 (en) | 2018-10-31 |
| CN108603469B (en) | 2021-01-26 |
| WO2017108470A1 (en) | 2017-06-29 |
| CN108603469A (en) | 2018-09-28 |
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