EP2825773B1 - Pompe enfichable - Google Patents

Pompe enfichable Download PDF

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Publication number
EP2825773B1
EP2825773B1 EP13819023.6A EP13819023A EP2825773B1 EP 2825773 B1 EP2825773 B1 EP 2825773B1 EP 13819023 A EP13819023 A EP 13819023A EP 2825773 B1 EP2825773 B1 EP 2825773B1
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EP
European Patent Office
Prior art keywords
chamber
pump
piston
cylinder
plug
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.)
Active
Application number
EP13819023.6A
Other languages
German (de)
English (en)
Other versions
EP2825773A1 (fr
Inventor
Ngoc-Tam Vu
Uwe Nigrin
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.)
Vitesco Technologies GmbH
Original Assignee
Vitesco Technologies GmbH
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Filing date
Publication date
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Publication of EP2825773A1 publication Critical patent/EP2825773A1/fr
Application granted granted Critical
Publication of EP2825773B1 publication Critical patent/EP2825773B1/fr
Active legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • 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
    • F02M59/025—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 a single piston
    • F02M59/027—Unit-pumps, i.e. single piston and cylinder pump-units, e.g. for cooperating with a camshaft
    • 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
    • F02M59/442—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 preventing fuel leakage around pump plunger, e.g. fluid barriers
    • 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
    • F04B1/0421—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
    • F04B1/0404—Details or component parts
    • F04B1/0439—Supporting or guiding means for the pistons
    • 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
    • F04B1/0448—Sealing means, e.g. for shafts or housings
    • 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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/05—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by internal-combustion engines
    • 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
    • F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
    • F04B19/20—Other positive-displacement pumps
    • F04B19/22—Other positive-displacement pumps of reciprocating-piston type
    • 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
    • F04B53/10—Valves; Arrangement of valves
    • 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
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • 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
    • 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
    • F04B53/18—Lubricating
    • 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
    • F04B9/042—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 cams

Definitions

  • the invention relates to a plug-in pump with a cylinder and a pump housing.
  • the cylinder has a cavity in which a movable piston is received, one end of the piston defining a pump chamber and the other end connected to a drive for the piston.
  • an inlet valve is arranged in the cylinder, which connects the pump chamber with an inlet for a fluid, and an outlet valve, which connects the pump chamber with an outlet.
  • the pump housing has a cavity which is divided into a first space, a second space separated from the first space and a connecting area connecting the first space and the second space, different fluids flowing in both spaces.
  • the plug-in pump has a piston which is arranged in a cavity of a cylinder head and is driven on a camshaft via a roller tappet.
  • the piston can be moved linearly in the cavity in order to open an inlet for the fuel into a pump work space during a suction stroke.
  • the fuel is passed on from the pump work space through a pump outlet to another engine unit.
  • the pump piston has at its end facing away from the pump work space a sealing element which surrounds it and seals the piston against the engine oil which lubricates the camshaft, for example, in order to prevent fuel from getting into the engine oil, and vice versa.
  • DE 10 2009 001 566 A1 , DE 10 2008 002 195 A1 and DE 10 2008 001 018 A1 each disclose a plug-in pump in which a pump piston extends through a first space which is filled with a first fluid and a second space which is filled with a second fluid, the two spaces being fluidly separated from one another.
  • a single spring acts on the pump piston with a restoring force.
  • WO 2012/083914 A2 discloses a high-pressure fuel pump in which a leak from a pump chamber of the high-pressure fuel pump can close into a drive chamber of the high-pressure fuel pump.
  • the invention relates to a plug-in pump with a cylinder and a separate pump housing, the cylinder having a cavity in which a movable piston is preferably received in a sealing manner.
  • the piston can move at least linearly in the cavity, the cavity forming a guide for the piston, having a shape and an inner diameter that substantially corresponds to the shape and outer diameter of the piston.
  • a first end of the piston facing the cylinder defines a pump work space. This means that the first end before the start of a suction stroke of the piston, in a first end position, completely closes the pump work space, since before the start of the suction stroke the first end of the piston lies in the pump work space and essentially fills it up.
  • the piston moves in a direction away from the cylinder and out of the pump chamber, so that fuel can now flow into the pump chamber through an open inlet valve.
  • the piston is in a second end position and the pump working space has its maximum volume.
  • the fuel in the pump work space is displaced from the pump work space by an outlet valve when the inlet valve is closed.
  • the inlet and outlet valves are arranged in the cylinder and the inlet valve connects the pump work space to an inlet for a first fluid.
  • the second end of the piston is connected to a piston driving device that linearly moves the piston in the cavity from the second to the first position, and vice versa.
  • the drive device can be, for example, a camshaft of an engine.
  • the pump housing of the plug-in pump has a cavity which forms at least a first space and a separate second space which is separate from the first space.
  • the first room is fluidically sealed from the second room.
  • the pump housing is connected to the cylinder and preferably surrounds a part of the cylinder, in particular a cylindrical part of the cylinder, in which the cavity for the piston is at least partially formed.
  • This part of the cylinder can e.g. protrude into the first cavity of the pump housing.
  • the housing and / or the cylinder can have a sealing element which prevents the first fluid that enters the first space from escaping from the plug-in pump through the connection point between the cylinder and the pump housing.
  • the first fluid can flow through the inlet in the pump housing into, for example, an annular channel which is formed in the pump housing. From the ring channel in the pump housing, the first fluid can flow through connecting channels also formed in the pump housing into a further ring channel, which in the connection area between the cylinder and the pump housing is formed. At least one side wall of this ring channel can be formed by an outside of the cylinder and at least one other side wall by an outside of the housing.
  • a groove can be made, for example, in the cylinder and / or in the pump housing in at least one of the facing end faces of the cylinder and pump housing, which groove becomes a closed channel by connecting the cylinder to the pump housing.
  • the fluid can flow from the annular channel formed in the connecting area of the cylinder and the pump housing into supply channels which guide the fluid to a supply space for the fluid in the area of the inlet valve for the pump work space.
  • supply channels can additionally be connected to return channels which guide excess fluid back into a supply container.
  • the inlet valve is connected to an actuator which controls the opening and closing of the inlet valve, which is preferably a digital inlet valve (DIV), according to predefined criteria.
  • DIV digital inlet valve
  • the second end of the piston is connected to an intermediate piece which transmits the movements of the drive unit to the piston.
  • Connected can mean that there are two separate parts, the opposite end faces of which touch each other, or that the piston and the intermediate piece are formed in one piece, or that the piston with the intermediate piece e.g. is connected via positive locking and / or non-positive locking.
  • the intermediate piece is arranged in the cavity of the pump housing and extends from the first space into the second space.
  • the intermediate piece can be a cylindrical body, for example, with a first section which projects into the first space and with the end facing the cylinder abuts the second end of the piston, and a third section which projects into or extends through the second space and which makes direct or indirect contact with the drive device.
  • the intermediate piece can have a second section which connects the first section to the third section and which projects through a connecting area formed in the cavity of the pump housing between the first space and the second space.
  • the connecting section can have the shape of a hollow cylinder, with an inside diameter that is preferably constant over its length and essentially corresponds to an outside diameter of the cylindrical intermediate piece.
  • a sealing element can be attached in the inner wall of the connection area and / or on a surface of the outer circumference of the second section of the intermediate piece in order to fluidly separate the first space from the second space.
  • the sealing element can be a simple wiper or e.g. around a sealing ring.
  • a spring element is arranged in each case in the first space and in the second space of the cavity of the pump housing.
  • the spring element (s) can be, for example, spiral springs which encompass the intermediate piece or part of the first section of the intermediate piece and / or part of the third section of the intermediate piece.
  • the spring element (s) are tensioned by the drive device during the delivery stroke of the piston and push the intermediate piece back in the opposite direction after the end of the delivery stroke, that is to say cause or support the suction stroke of the piston if it follows the movement of the intermediate piece.
  • the spring element in the first room can e.g. Support on an underside of the cylinder or an inner wall of the end of the cavity of the pump housing facing the cylinder and on the end of the intermediate piece facing the piston.
  • the intermediate piece can have a spring holder, i.e. a circumferential widening which is connected to the intermediate piece, e.g. attached to the intermediate piece, or is formed by the intermediate piece, on which the end of the spring element facing away from the cylinder can be supported.
  • the spring element in the second space can be supported on an underside of the connection area and on a spring holder which e.g. is connected to the end of the intermediate piece facing the drive device.
  • the end of the pump housing facing the drive device can form a guide bush for a drive slide, with a roller tappet which is moved by a cam of a camshaft.
  • the drive carriage can slide up and down in the guide bush and thereby move the intermediate piece and tension the spring elements.
  • the spring holder for the spring element in the second space of the pump housing can be formed or connected to the drive carriage by the end of the intermediate piece facing the drive device.
  • the drive device can be a camshaft of an internal combustion engine, wherein a Cam of the camshaft preferably acts on a roller tappet and the roller tappet converts a rotary movement of the camshaft into a linear movement of the intermediate piece and the piston.
  • the first fluid is preferably a fuel for an internal combustion engine, e.g. Gasoline or diesel or gas, with the second fluid around a lubricating oil.
  • an internal combustion engine e.g. Gasoline or diesel or gas
  • the cylinder can be made of high quality steel with high strength, while the pump housing e.g. can be formed from cast or sintered steel, with a lower strength than that of the cylinder. This saves material and processing costs as well as weight.
  • the separate pump housing can be combined with cylinders for different fuels in a modular design, which leads to further savings and at the same time to a desired standardization of components.
  • the Figure 1 shows a section through a plug-in pump 1 according to the invention.
  • the plug-in pump 1 consists of a cylinder 2 and a separate pump housing 3.
  • the cylinder 2 has a first part 2b, with a surface 2a which faces the pump housing.
  • the first part 2b of the cylinder 2 has an inlet valve 7 with an actuator 9, which causes the inlet valve 7 to open and close, an outlet valve 8 and a pump work chamber 6.
  • the pump work space 6 is part of a cavity 4.
  • the cylinder 2 also has a second part 2c, which is formed together with the first part 2b and extends the first part 2b on a side opposite the actuator 9.
  • the second part 2c also has the cavity 4.
  • the second part 2c has an outer circumference that is smaller than the outer circumference of the first part 2b and extends the first part 2b of the cylinder 2 in a central area.
  • the cavity 4 is a through hole in the second part 2c, and a blind hole in the first part 2b, which opens into the pump work chamber 6.
  • a piston 5 is arranged in the cavity 4, with a first end 5a, which has a shape that substantially corresponds to the shape of the pump work chamber 6, and a second end 5b, which projects beyond the end of the second part 2c of the cylinder 2.
  • the piston 5 has an outer circumference that essentially corresponds to the inner circumference of the cavity 4.
  • the piston 5 can move linearly in the cavity 4 into a first end position, in which it completely fills the pump work space 6, and into a second end position, in which the piston 5 lies completely outside the pump work space 6. In the second end position the piston 5 or its end 5a facing the pump work chamber 6 forms a rear wall of the pump work chamber 6.
  • the plug-in pump 1 also has a pump housing 3, with an end face 3 a facing the cylinder.
  • the pump housing 3 has a cavity 10 which forms a first space 11, a second space 13 and a connecting region 15 which connects the first space 11 to the second space 13.
  • the pump housing 3 further comprises an inlet 12 for a fuel and, at its end facing away from the cylinder 2, a guide bush 26 for a slide 27, which comprises a roller tappet 28 which is linearly moved in the guide bush 26 by a cam of a camshaft, not shown
  • the second part 2c of the cylinder 2 projects into the first space 11.
  • the cylinder 2 has a circumferential engagement element 29 in the region of the transition from the first part 2b to the second part 2c and the pump housing 3 in the region of the system of the engagement element 29 on an inner wall of the cavity 10 of the pump housing 3, a sealing element 30.
  • An intermediate piece 14 is arranged in the cavity 10 of the pump housing 3, which connects the piston 5 to the drive device or the slide 27 to the roller tappet 28 and thus transmits the drive force of the drive device to the piston 5.
  • the intermediate piece 14 has a first section 14a, the end face facing the cylinder 2 of which rests against the second end 5b of the piston 5 or is connected to the latter in a positive and / or non-positive manner.
  • the first section 14a is followed by a second section 14b, one of which is formed in the cavity 10 Connection area 15 protrudes.
  • the connection region 15 is formed as a hollow cylinder, with an inner diameter which essentially corresponds to the outer diameter of the likewise cylindrical second section 14b.
  • the second section 14b has a sealing element 16 in the form of a wiper, which prevents a fluid located in the first space 11 from mixing with a fluid present in the second space 13.
  • connection area 15 together with the second section 14b of the intermediate piece 14 fluidly seal the first space 11 and the second space 13 from one another.
  • the second section 14b is followed by a third section 14c, which is arranged in the second space 13 and is connected directly or indirectly to the roller tappet 28 or the slide 27.
  • a spring element 17 is arranged in the first space 11, which is supported on the outer side 2a of the cylinder 2 facing the pump housing 3 and on a spring holder 19 which, in the exemplary embodiment shown, is attached to the end of the intermediate piece 14 facing the piston 5.
  • the second part 2c forms a guide for the spring element 17.
  • a spring element 18 is arranged in the second space 13, which is supported on an underside of the intermediate region 15 and on a spring holder 21, the spring holder 21 being connected to the slide 27 and / or the end of the intermediate piece 14 facing the drive device.
  • the spring element 18 is compressed during the delivery stroke of the plug-in pump 1 and can then expand again and carry out and / or support the suction stroke of the plug-in pump 1.
  • the intermediate region 15 can be partially formed as a cylindrical sleeve which projects into the second space 13 and is encompassed by the spring element 18, so that the sleeve forms a guide for the spring element 18.
  • FIG 2 is a further section through the plug-in pump 1 Figure 1 shown, which shows an example of a flow path of the fuel from the inlet 12, which cannot be seen in this view, to the inlet valve 7.
  • the fuel is passed into an annular channel 20a formed in the pump housing 3, which extends in the pump housing 3 at the level of the inflow 12 around the cavity 10.
  • the fuel is conducted from the ring channel 20 a via feed channels 22 into the ring channel 20 formed between the cylinder 2 and the pump housing 3.
  • Connection channels 23 lead from the ring channel 20 to delivery channels 24, which guide the fuel into a fuel supply space 25 located in front of the inlet valve 7.
  • the delivery channels 24 are connected to return channels that direct fuel that is not required back into a tank.

Landscapes

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

Claims (7)

  1. Pompe enfichable (1) avec un cylindre (2) et un boîtier de pompe (3), le cylindre (2) présentant une cavité (4), dans laquelle un piston (5) mobile est accueilli, une première extrémité (5a) du piston (5) délimitant un compartiment de pompe (6) et une deuxième extrémité (5b) du piston (5) étant reliée à un dispositif d'entraînement pour le piston (5),
    une soupape d'admission (7) étant disposée dans le cylindre (2), laquelle raccorde le compartiment de pompe (6) à une arrivée (12) pour un premier fluide, et une soupape de sortie (8), laquelle raccorde le compartiment de pompe (6) à une sortie (8a),
    le boîtier de pompe (3) présentant une cavité (10) formant un premier espace (11), lequel est raccordé à une arrivée (12) pour le premier fluide, et au moins un deuxième espace (13) séparé du premier espace (11), lequel deuxième espace est raccordé à un système d'un deuxième fluide, le premier espace (11) étant étanche aux fluides, relativement au deuxième espace (13), la deuxième extrémité (5b) du piston (5) étant reliée, ou étant formée d'une seule pièce, avec une pièce intermédiaire (14), laquelle transmet au piston (5) un mouvement du dispositif d'entraînement,
    un élément à ressort (17 ; 18) étant respectivement disposé dans le premier espace (11) et dans le deuxième espace (13), l'un des éléments à ressort (17) déplaçant le piston (5) et l'autre élément à ressort (18) déplaçant la pièce intermédiaire (14) dans une direction dans laquelle la soupape d'admission (7) raccorde l'arrivée (12) avec le compartiment de pompe.
  2. Pompe enfichable selon la revendication 1, la pièce intermédiaire (14) présentant une première section (14a) faisant saillie dans le premier espace (11), une troisième section (14c) faisant saillie dans le deuxième espace (13) et une deuxième section (14b) raccordant la première section (14a) et la troisième section (14c), laquelle deuxième section traversant une zone de raccordement (15) formée dans la cavité (10) entre le premier espace (11) et le deuxième espace (13).
  3. Pompe enfichable selon la revendication 2, la zone de raccordement (15) ayant la forme d'un cylindre creux, avec un diamètre intérieur correspondant essentiellement au diamètre extérieur de la deuxième section (14b) et la paroi interne de la zone de raccordement (15) et/ou de la deuxième section (14b) présentant un élément d'étanchéité (16), lequel empêche que le premier fluide et le deuxième fluide se mélangent.
  4. Pompe enfichable selon l'une quelconque des revendications précédentes, l'élément à ressort (17) s'appuyant dans le premier espace (11) sur un côté inférieur de la tête de cylindre (2) et sur un support de ressort (19), lequel est relié avec une extrémité de la pièce intermédiaire (14) tournée vers la deuxième extrémité (5b) du piston (5).
  5. Pompe enfichable selon la revendication 2, l'élément à ressort (18) s'appuyant dans le deuxième espace (13) sur un côté inférieur de la zone de raccordement (15) et sur un support de ressort (21), lequel est relié avec une extrémité de la pièce intermédiaire (14) tournée vers le dispositif d'entraînement.
  6. Pompe enfichable selon l'une quelconque des revendications précédentes, le premier fluide étant conduit par l'arrivée (12) et par des conduites de raccordement (20a, 22) dans le boîtier de pompe (3) dans un canal annulaire (20), le canal annulaire (20) étant formé dans la zone de raccordement entre le cylindre (2) et le boîtier (3) et au moins une paroi latérale du canal annulaire (20) étant formée par un côté extérieur (2a) du cylindre (2) et au moins une paroi latérale du canal annulaire (20) étant formée par un côté extérieur (3a) du boîtier (3).
  7. Pompe enfichable selon l'une quelconque des revendications précédentes, le dispositif d'entraînement étant un arbre à cames, une came de l'arbre à cames agissant de préférence sur un poussoir à galets (28) et le poussoir à galets (28) transformant un mouvement de rotation de l'arbre à cames en un mouvement linéaire du piston (5).
EP13819023.6A 2012-12-21 2013-12-19 Pompe enfichable Active EP2825773B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012224317.8A DE102012224317B4 (de) 2012-12-21 2012-12-21 Steckpumpe
PCT/EP2013/077331 WO2014096162A1 (fr) 2012-12-21 2013-12-19 Pompe enfichable

Publications (2)

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EP2825773A1 EP2825773A1 (fr) 2015-01-21
EP2825773B1 true EP2825773B1 (fr) 2020-06-17

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EP13819023.6A Active EP2825773B1 (fr) 2012-12-21 2013-12-19 Pompe enfichable

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US (1) US9951733B2 (fr)
EP (1) EP2825773B1 (fr)
DE (1) DE102012224317B4 (fr)
WO (1) WO2014096162A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012224317B4 (de) 2012-12-21 2015-07-23 Continental Automotive Gmbh Steckpumpe
DE102016201897A1 (de) * 2016-02-09 2017-08-10 Robert Bosch Gmbh Pumpe zur Förderung eines Fluids
DE102016203543B3 (de) * 2016-03-03 2017-08-31 Continental Automotive Gmbh Pumpenkolben für eine Kolben-Kraftstoffhochdruckpumpe sowie Kolben-Kraftstoffhochdruckpumpe
DE102017114177A1 (de) * 2017-06-27 2018-12-27 L'orange Gmbh Hochdruckpumpe, insbesondere zur Kraftstoffeinspritzung in Brennkraftmaschinen
DE102019117910A1 (de) * 2019-07-03 2021-01-07 Schaeffler Technologies AG & Co. KG Rollenstößel für eine Kraftstoffhochdruckpumpe

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Publication number Priority date Publication date Assignee Title
US4153076A (en) * 1977-12-08 1979-05-08 Waters Associates, Inc. Pneumatic valve apparatus
DE3307828A1 (de) * 1983-03-05 1984-09-06 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffeinspritzeinrichtung fuer brennkraftmaschinen
DE4118555A1 (de) * 1991-06-06 1992-12-10 Bosch Gmbh Robert Foerderbeginnverstelleinrichtung einer kraftstoffeinspritzpumpe
US5967426A (en) * 1997-02-28 1999-10-19 Mcleod; David J. Knockdown portable liquid drywall material spray system apparatus and method
JP4414966B2 (ja) * 2006-01-16 2010-02-17 Ｎｏｋ株式会社 高圧燃料ポンプおよび高圧燃料ポンプ用シールシステム
DE102008001018A1 (de) * 2008-04-07 2009-10-08 Robert Bosch Gmbh Hochdruckkraftstoffpumpe als Steckpumpe
DE102008002195A1 (de) 2008-06-04 2009-12-10 Robert Bosch Gmbh Steckpumpe für eine Verbrennungskraftmaschine
DE102008042650A1 (de) * 2008-10-07 2010-04-08 Robert Bosch Gmbh Radialkolbenpumpe zur Versorgung einer Verbrennungskraftmaschine mit Kraftstoff
DE102009000857A1 (de) * 2009-02-13 2010-08-19 Robert Bosch Gmbh Pumpenanordnung
DE102009001566A1 (de) * 2009-03-16 2010-09-23 Robert Bosch Gmbh Hochdruckpumpe
DE112011104511A5 (de) 2010-12-23 2013-10-17 Schaeffler Technologies AG & Co. KG Radialkolbenpumpe
DE102011007781A1 (de) * 2011-04-20 2012-10-25 Continental Automotive Gmbh Steckpumpe
DE102012224317B4 (de) 2012-12-21 2015-07-23 Continental Automotive Gmbh Steckpumpe

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Also Published As

Publication number Publication date
US20150345447A1 (en) 2015-12-03
DE102012224317A1 (de) 2014-06-26
US9951733B2 (en) 2018-04-24
DE102012224317B4 (de) 2015-07-23
WO2014096162A1 (fr) 2014-06-26
EP2825773A1 (fr) 2015-01-21

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