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WO2004048768A1 - Ensemble pompe comprenant une pompe haute pression et une pompe basse pression disposee en amont de la premiere pour un dispositif d'injection de carburant de moteur a combustion interne - Google Patents

Ensemble pompe comprenant une pompe haute pression et une pompe basse pression disposee en amont de la premiere pour un dispositif d'injection de carburant de moteur a combustion interne Download PDF

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Publication number
WO2004048768A1
WO2004048768A1 PCT/DE2003/003215 DE0303215W WO2004048768A1 WO 2004048768 A1 WO2004048768 A1 WO 2004048768A1 DE 0303215 W DE0303215 W DE 0303215W WO 2004048768 A1 WO2004048768 A1 WO 2004048768A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure pump
pump
low
pump housing
housing
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.)
Ceased
Application number
PCT/DE2003/003215
Other languages
German (de)
English (en)
Inventor
Josef Guentert
Michael Pawella
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2004048768A1 publication Critical patent/WO2004048768A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
    • F02M39/005—Arrangements of fuel feed-pumps with respect to fuel injection apparatus
    • 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
    • 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
    • F04B1/053—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/08—Combinations of two or more pumps the pumps being of different types
    • F04B23/10—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type
    • F04B23/103—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type being a radial piston pump
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/006—Crankshafts
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • 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
    • 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
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/045—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being eccentrics
    • 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
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0076—Fixing rotors on shafts, e.g. by clamping together hub and shaft
    • 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
    • F04C2210/20—Fluid liquid, i.e. incompressible
    • F04C2210/203—Fuel
    • 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
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings

Definitions

  • the invention relates to a pump arrangement with a high-pressure pump and a low-pressure pump connected upstream thereof for a fuel injection device of an internal combustion engine according to the preamble of claim 1.
  • Such a pump arrangement is known from DE 197 36 160 AI.
  • the high-pressure pump has a housing in which at least one pump element and a drive shaft driving it are arranged in the interior thereof.
  • the low-pressure pump has its own pump housing, in which at least one rotating delivery element in the form of a gearwheel is arranged in a pump chamber.
  • the low pressure pump forms a complete separate unit which is flanged to the pump housing of the high pressure pump.
  • the low-pressure pump has its own drive shaft, which is coupled to the drive shaft of the high-pressure pump.
  • a disadvantage of this pump arrangement is the great manufacturing effort involved in forming a complete structural unit
  • Low-pressure pump This also causes the assembly to require a large amount of space and to be heavy. Furthermore, complex centering of the low-pressure pump on the pump housing of the high-pressure pump is also necessary in order to ensure an exact alignment of the drive shafts with respect to one another. Furthermore, complex seals on the one hand of the pump housing of the low pressure pump are on their own and on the other hand between the Pump housing of the high pressure pump and the pump housing of the low pressure pump required at the passage of the drive shafts.
  • the pump arrangement according to the invention with the features according to claim 1 has the advantage that its manufacture due to the one-piece with the pump housing of the high pressure pump
  • Low pressure pump is simplified. In addition, the installation space and weight of the pump arrangement are reduced and no further measures for centering the low-pressure pump are required.
  • the design according to claim 2 allows the formation of the pump housing of the low pressure pump in a simple manner.
  • the embodiment according to claim 5 enables storage of the at least one delivery element of the low-pressure pump in a simple manner.
  • FIG. 1 shows a pump arrangement in a longitudinal section
  • FIG. 2 shows the pump arrangement in a cross section along line II-II in FIG. 1
  • FIG. 3 shows the pump arrangement in a view in the direction of arrow III in FIG. 1 with the cover part removed.
  • Description of the embodiment 1 to 3 show a pump arrangement with a high-pressure pump 10 and a low-pressure pump 12 connected upstream thereof for a fuel injection device of an internal combustion engine, for example of a motor vehicle.
  • a high-pressure pump 10 and a low-pressure pump 12 connected upstream thereof for a fuel injection device of an internal combustion engine, for example of a motor vehicle.
  • Fuel is pumped under high pressure of up to 2000 bar, for example into a memory from which fuel is taken for injection at the internal combustion engine.
  • the low pressure pump 12 delivers fuel from a fuel reservoir to the suction side of the high pressure pump 10.
  • the high-pressure pump 10 is designed as a radial piston pump and has a housing 14 in which a drive shaft 16 is rotatably mounted about an axis 17. in the
  • High-pressure pump housing 14 is at least one or preferably a plurality of pump elements 18, which are driven by the drive shaft 16.
  • the drive shaft 16 has a shaft section 20 which is formed eccentrically to its axis of rotation 17 and on which a ring 22, for example in the form of a polygon ring, is rotatably mounted.
  • the pump elements 18 each have a pump piston 24 which is slidably guided in a cylinder bore 26 which extends at least approximately radially to the axis of rotation 17 of the drive shaft 16.
  • the pump piston 24 of each pump element 18 is supported with its piston foot 25 on the ring 22.
  • the piston foot 25 can be held in contact with the ring 22 by a spring 28, which is supported on the one hand on the high-pressure pump housing 14 and on the other hand via a spring plate 27 on the piston foot 25.
  • a pump working space 30 is delimited by the respective pump piston 24 and can be connected to a fuel supply into the fuel supply through an inlet valve 32 opening into the pump working space 30 Low pressure pump 12 fuel is required.
  • the pump working space 30 can also be connected to the reservoir by an outlet valve 34 opening towards the reservoir.
  • the drive shaft 16 protrudes with its two ends through end walls of the high-pressure pump housing 14, one end of the drive shaft 16 being driven by the internal combustion engine in a manner not shown, for example via a belt drive.
  • a pump housing 40 of the low-pressure pump 12 is at least partially integrally formed on the high-pressure pump housing 14.
  • the low-pressure pump housing 40 is formed by a wall projecting from the outside of the end wall 15 of the high-pressure pump housing 14 facing away from the interior of the high-pressure pump housing 14 in which the pump elements 18 are arranged.
  • the wall 40 extends over the outside of the end wall 15 as a self-contained ring.
  • the part of the end wall 15 lying within the wall 40 likewise forms part of the low-pressure pump housing.
  • a cover part 42 is also provided, which rests on the end face of the wall 40 facing away from the high-pressure pump housing 14 and with which High pressure pump housing 14 is connected, for example screwed.
  • a pump chamber 44 of the low-pressure pump 12 is delimited by the end wall 15 of the high-pressure pump housing 14, the wall 40 and the cover part 42.
  • the low-pressure pump 12 is designed as a gear pump and, as delivery elements, has a pair of rotating gear wheels 46, 48 arranged in the pump chamber 44 and meshing with one another on their outer circumference.
  • the pin 50 is arranged at least approximately coaxially to the axis of rotation 17 of the drive shaft 16 and has a through opening 54 in the form of a bore through which the end of the drive shaft 16 passes and projects into the pump chamber 44.
  • the end of the drive shaft 16 is rotatably connected to the gear 46 mounted on the pin 50 via a coupling element 56.
  • the coupling element 56 enables the gearwheel 46 to be driven in rotation by the drive shaft 16 and to compensate for any incorrect positions of the axis of rotation 17 of the drive shaft 16 and the axis of rotation 51 of the gearwheel 46.
  • the gear 46 is driven in rotation by the drive shaft 16 during operation of the pump arrangement and transmits this rotary movement via a spur toothing to that which is also provided with a spur toothing
  • Gear 46 on its outer circumference meshing gear 48.
  • the gearwheels 46, 48 divide the pump chamber 44 into two partial areas due to their tooth engagement, of which a first partial area forms a suction chamber 58 and a second partial area forms a pressure chamber 60.
  • the suction space 58 is via one each between the tooth grooves and the adjacent wall 40 the pump channel 44 formed delivery channel 62 connected to the pressure chamber 60.
  • the suction chamber 58 and the pressure chamber 60 each have a connection opening in the end wall 15 of the high-pressure pump housing 14 or in the cover part 42, via which the suction chamber 58 with a suction line (not shown) from the fuel reservoir and the pressure chamber 60 via channels (not shown in detail) in the high-pressure pump housing 14 with the Inlet valves 32 of the pump elements 18 of the high pressure pump 10 is connected.
  • the connection opening in the suction space 58 forms one
  • Inlet opening 64 and the connection opening into pressure chamber 60 form an outlet opening 66.
  • fuel is conveyed from the suction chamber 58 into the pressure chamber 60 through the delivery channels 62 by the gearwheels 62.
  • the gears 46, 48 are arranged with their outer circumference at a short distance from the inside of the wall 40, which delimits the pump chamber 44 in the radial direction with respect to the axes of rotation 51, 53 of the gears 46, 48.
  • the gear wheels 46, 48 are arranged in the direction of their axes of rotation 51, 53 with a small distance between the outside of the end wall 15 of the high-pressure pump housing 14 facing away from the interior and the inside of the cover part 42 in the pump chamber 44.
  • the outside of the end wall 15 and the inside of the cover part 42 form axial bearings for the gears 46, 48, on which the gears 46, 48 can come to rest with their end faces.
  • the flatness, the pore class and the surface roughness of the outside of the end wall 15 and the inside of the cover part 42 are precisely specified in order to achieve safe operation and good efficiency of the low-pressure pump 12.
  • the high-pressure pump housing 14 with the integrally molded wall 40 is preferably made of gray cast iron.
  • the Gears 46, 48 are preferably made of steel, for example sintered steel.
  • the cover part 42 can be made of aluminum, steel or cast iron.
  • an annular groove 68 can be introduced, into which an elastic sealing element 70 is inserted, by means of which the pump chamber 44 is sealed between the wall 40 and the cover part 42.
  • the annular groove 68, in which the sealing element 70 is inserted is formed in the cover part 42, where it is easier to manufacture than in the wall 40. Further sealing of the low-pressure pump 12 is not necessary, since the wall 40 is integral with the high-pressure pump housing 14 is formed and the passage of the drive shaft 16 takes place within the pump chamber 44.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Reciprocating Pumps (AREA)
  • Rotary Pumps (AREA)

Abstract

L'invention concerne un ensemble pompe comprenant une pompe haute pression (10) pourvue d'un carter (14), dans une cavité duquel se trouve au moins un élément de pompe (18) et un arbre d'entraînement (16) associé. Une pompe basse pression (12) comporte un carter (15, 40, 42) dont une chambre (44) contient au moins un élément de refoulement (46, 48) entraîné en rotation au moins indirectement par l'arbre d'entraînement (16) de la pompe haute pression (10). Le carter (15, 40) de la pompe basse pression forme au moins partiellement un bloc avec le carter (14) de la pompe haute pression.
PCT/DE2003/003215 2002-11-25 2003-09-26 Ensemble pompe comprenant une pompe haute pression et une pompe basse pression disposee en amont de la premiere pour un dispositif d'injection de carburant de moteur a combustion interne Ceased WO2004048768A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10254840.4 2002-11-25
DE10254840A DE10254840A1 (de) 2002-11-25 2002-11-25 Pumpenanordnung mit einer Hochdruckpumpe und einer dieser vorgeschalteten Niederdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine

Publications (1)

Publication Number Publication Date
WO2004048768A1 true WO2004048768A1 (fr) 2004-06-10

Family

ID=32240366

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2003/003215 Ceased WO2004048768A1 (fr) 2002-11-25 2003-09-26 Ensemble pompe comprenant une pompe haute pression et une pompe basse pression disposee en amont de la premiere pour un dispositif d'injection de carburant de moteur a combustion interne

Country Status (2)

Country Link
DE (1) DE10254840A1 (fr)
WO (1) WO2004048768A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010012525A1 (fr) * 2008-07-29 2010-02-04 Robert Bosch Gmbh Dispositif d'alimentation en carburant pour moteur à combustion interne
US20100183449A1 (en) * 2007-06-14 2010-07-22 Vito Spinelli High-pressure pump for supplying fuel to an internal-combustion engine
ITMI20122039A1 (it) * 2012-11-29 2014-05-30 Bosch Gmbh Robert Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna
ITMI20130239A1 (it) * 2013-02-20 2014-08-21 Bosch Gmbh Robert Gruppo pompa per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600128919A1 (it) * 2016-12-20 2018-06-20 Bosch Gmbh Robert Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna
DE102018210006A1 (de) 2018-06-20 2019-12-24 Robert Bosch Gmbh Pumpenanordnung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1186247A (fr) * 1957-07-17 1959-08-18 Prec Mecanique Perfectionnements apportés aux pompes à piston à débit variable du genre de celles pour l'injection de combustible dans les moteurs
US3146716A (en) * 1961-12-26 1964-09-01 Allis Chalmers Mfg Co Fuel supplying mechanism
DE1260867B (de) * 1962-09-10 1968-02-08 Roosa Vernon D Kraftstoffeinspritzpumpe
US4041921A (en) * 1973-12-13 1977-08-16 Robert Bosch Gmbh Fuel injection pump for internal combustion engines
WO2002084105A1 (fr) * 2001-04-18 2002-10-24 Robert Bosch Gmbh Pompe a carburant haute pression destinee au systeme a carburant d'un moteur a combustion interne a injection directe, systeme a carburant et moteur a combustion interne

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1186247A (fr) * 1957-07-17 1959-08-18 Prec Mecanique Perfectionnements apportés aux pompes à piston à débit variable du genre de celles pour l'injection de combustible dans les moteurs
US3146716A (en) * 1961-12-26 1964-09-01 Allis Chalmers Mfg Co Fuel supplying mechanism
DE1260867B (de) * 1962-09-10 1968-02-08 Roosa Vernon D Kraftstoffeinspritzpumpe
US4041921A (en) * 1973-12-13 1977-08-16 Robert Bosch Gmbh Fuel injection pump for internal combustion engines
WO2002084105A1 (fr) * 2001-04-18 2002-10-24 Robert Bosch Gmbh Pompe a carburant haute pression destinee au systeme a carburant d'un moteur a combustion interne a injection directe, systeme a carburant et moteur a combustion interne

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100183449A1 (en) * 2007-06-14 2010-07-22 Vito Spinelli High-pressure pump for supplying fuel to an internal-combustion engine
US8523534B2 (en) 2007-06-14 2013-09-03 Robert Bosch Gmbh High-pressure pump for supplying fuel to an internal-combustion engine
WO2010012525A1 (fr) * 2008-07-29 2010-02-04 Robert Bosch Gmbh Dispositif d'alimentation en carburant pour moteur à combustion interne
ITMI20122039A1 (it) * 2012-11-29 2014-05-30 Bosch Gmbh Robert Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna
ITMI20130239A1 (it) * 2013-02-20 2014-08-21 Bosch Gmbh Robert Gruppo pompa per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna

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Publication number Publication date
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