EP3184797A2 - Fuel pump - Google Patents

Fuel pump Download PDF

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Publication number
EP3184797A2
EP3184797A2 EP16198196.4A EP16198196A EP3184797A2 EP 3184797 A2 EP3184797 A2 EP 3184797A2 EP 16198196 A EP16198196 A EP 16198196A EP 3184797 A2 EP3184797 A2 EP 3184797A2
Authority
EP
European Patent Office
Prior art keywords
fuel
locking pin
fuel pump
inner sleeve
outer sleeve
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.)
Granted
Application number
EP16198196.4A
Other languages
German (de)
French (fr)
Other versions
EP3184797A3 (en
EP3184797B1 (en
Inventor
Peer Christopher Lege
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.)
Audi AG
Original Assignee
Audi AG
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 Audi AG filed Critical Audi AG
Publication of EP3184797A2 publication Critical patent/EP3184797A2/en
Publication of EP3184797A3 publication Critical patent/EP3184797A3/en
Application granted granted Critical
Publication of EP3184797B1 publication Critical patent/EP3184797B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/447—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston means specially adapted to limit fuel delivery or to supply excess of fuel temporarily, e.g. for starting of the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/0265—Pumps feeding common rails
    • F02M63/027—More than one high pressure pump feeding a single common rail
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems
    • F02D41/3836—Controlling the fuel pressure
    • F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
    • 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
    • F02M39/02—Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—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
    • F02M59/022—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 having an accumulator storing pressurised fuel during pumping stroke of the piston for subsequent delivery to the injector
    • 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
    • F02M59/02—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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/30—Varying fuel delivery in quantity or timing with variable-length-stroke pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • 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
    • F04B1/0408—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
    • F04B1/0413—Cams
    • 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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/008—Controlling each cylinder individually
    • F02D41/0087—Selective cylinder activation, i.e. partial cylinder operation

Definitions

  • the invention relates to a fuel pump and an injection system for an internal combustion engine.
  • a piston or plunger in a fuel pump is usually driven mechanically rigidly via a cam.
  • the piston and the cam are connected to one another via a so-called roller cup.
  • a fuel injection pump for an internal combustion engine is described with an acceleration-dependent injection timing. In this case, it is provided to vary a pressure of the fuel in an interior of the fuel injection pump as a function of the acceleration.
  • a fuel injection pump of the distributor type is in the document US 5 161 509 A described.
  • the fuel injection pump comprises a pump interior under control pressure, in which a speed regulator is arranged, via which an operation of the fuel injection pump is load-dependent to set.
  • Another fuel injection pump of the distributor type is from the document US 5,243,943 A known.
  • the fuel pump according to the invention which can also be referred to as a high-pressure pump, is designed for conveying fuel to a fuel reservoir of an injection system for an internal combustion engine, for example a motor vehicle, pressurizing fuel from the fuel pump and storing it under pressure in the fuel reservoir is. From the fuel accumulator, the pressurized and / or standing fuel is to be injected into at least one combustion chamber of the internal combustion engine.
  • This fuel pump comprises at least one conveyor unit and is in contact with at least one cam gear, usually with a cam gear.
  • the at least one conveying unit has a piston, a spring designed as a conveying spring, an inner sleeve and an outer sleeve, which are arranged coaxially with one another in a cylinder, and a locking bolt arranged inside the cylinder.
  • the inner sleeve is connected to the piston, wherein the outer sleeve is in contact with the conveying spring and a roller of the at least one cam gear and / or is connected.
  • the inner sleeve and the outer sleeve are releasably connected via the locking pin.
  • the inner sleeve and the outer sleeve are connected together when the locking pin is in a home position, whereas the inner sleeve and the outer sleeve are separated from each other when the locking pin is in a rest position. If the locking pin is in the home position, the piston and the roller are mechanically connected to each other via the inner and outer sleeves. It is to transmit a force between the piston and the roller on the inner and outer sleeve. If the locking pin is in the rest position and the two sleeves are detached from each other, is a mechanical connection between the piston and the bolt interrupted.
  • the roller is in contact with a cam. Upon rotation of the cam, the roller is to be moved. If the locking pin is in the home position, move the piston indirectly from the cam over the roller. It is possible that the cam is formed as a component of the at least one cam gear.
  • the fuel pump cooperates with the at least one cam gear, wherein the piston is to move depending on whether the locking pin is in the home position or in the rest position, starting from a movement of the at least one cam gear or not.
  • at least one component of the at least one cam gear for example the roller, is also designed as a component of the fuel pump.
  • the locking pin is assigned a spring designed as a locking spring over which the locking pin is to be loaded.
  • the locking spring is adapted to apply the locking pin in the home position, wherein the inner sleeve and the outer sleeve are to be connected to each other via the locking pin.
  • the locking spring with engine oil which is to be pressurized to apply. If a force of the engine oil is greater than a limit due to the pressure of the engine oil, press the locking spring into the inner sleeve and set the locking pin in the rest position with the inner sleeve and outer sleeve being disengaged from each other.
  • At least one delivery unit of the fuel pump is only to promote fuel when the inner sleeve and the outer sleeve connected to each other.
  • a delivery of fuel with the at least one delivery unit is interrupted when the inner sleeve and the outer sleeve are released from each other in the rest position of the locking pin.
  • the at least one cam gear may be designed to be variable, wherein a height of a stroke of the piston is to be changed by adjusting the at least one cam gear.
  • the injection system according to the invention for an internal combustion engine has at least one module with at least one presented fuel pump and a fuel accumulator, wherein the at least one fuel pump of the at least one module is assigned to the fuel accumulator. Fuel to be pressurized by the fuel pump is to be delivered from the fuel pump into the fuel reservoir and stored therein under pressure.
  • the at least one fuel pump has at least one delivery unit with a locking pin, wherein fuel is to be conveyed to the fuel storage with the at least one delivery unit when the locking pin is in a basic position.
  • a promotion of fuel is interrupted when the locking pin is in a rest position.
  • the injection system has a plurality of delivery units.
  • a part of all conveyor units is to be activated in the injection system depending on a current load point of the internal combustion engine, whereas all other conveyor units are switched off or on.
  • fuel storage is to regulate depending on a number of each active and off conveyor units.
  • the presented fuel pump has the at least one delivery unit and thus at least one unit, which in each case comprises a piston. Accordingly, it is possible that the fuel pump not only has a delivery unit but in design a plurality of delivery units and thus a plurality of pistons.
  • a locking pin which is associated with a respective piston and the inner and outer sleeve as a mechanical switching element, it is possible even during operation of the fuel pump individual delivery units or pistons or turn off all conveyor units and thus fuel only a small number of switched on To pressurize and convey conveyor units.
  • a required drive power of the fuel pump is thus to be reduced by an amount of friction of at least one off or deactivated piston, as a result of which fuel consumption can be reduced in partial loads.
  • a number of strokes of at least one piston and a friction associated therewith is not dependent solely on a speed of the engine and the fuel pump is not designed solely for a need for fuel of the internal combustion engine. If there is a partial load for the Internal combustion engine requires less fuel, it is now possible to operate only a part of all conveyor units. It is alternatively or additionally possible to operate an operated piston in full funding or partial funding.
  • the fuel pump is designed and / or designated as a so-called plug-in pump.
  • This fuel pump comprises in design a plurality of pistons and is partially shut down during operation, when a part of the piston of the fuel pump is turned off.
  • the fuel storage which is also referred to as a common rail, depending on the definition, several delivery units with pistons are assigned as components of at least one fuel pump. In the operation of the injection system is only necessary for a given load point number of conveyor units with pistons to activate and set a reduced amount of fuel under pressure and store in the fuel tank.
  • a sleeve which is commonly referred to as a roll cup, and to connect between the roller, which is in contact with a cam, and the piston or a plunger, by providing the inner sleeve and the outer Sleeve made in two parts.
  • the inner sleeve is guided by and / or in the outer sleeve, wherein the outer sleeve is in contact with the roller and the delivery spring.
  • the inner sleeve is connected to the piston of the fuel pump.
  • the connection between the inner and the outer sleeve is provided with the described locking pin, which is spring-loaded by the locking spring.
  • the locking pin In the home position, the locking pin is in a locking position due to a force acting on the locking pin by the locking spring.
  • the inner and outer sleeves are rigidly connected to each other.
  • the piston over the inner and the outer sleeve, here are connected to each other, in operative contact with the roller and thus also indirectly with the cam is to lead over the piston fuel and / or to put under pressure.
  • the locking pin is acted upon from the outside with engine oil, which is under hydraulic pressure. In this case, this pressure or a corresponding force counteracts a force of the locking spring, which otherwise holds the locking pin in its basic position. Due to the pressure of the engine oil, the locking pin is pressed into the inner sleeve. Thus, it follows that the connection between the outer and the inner sleeve is released. In this case, the outer sleeve follows under the action of a force of the conveying spring on the role of a contour of the cam. Alternatively, the locking pin is in the rest position. The piston is decoupled from the roller and thus also from the cam and thus switched off and no longer promotes fuel. Furthermore, no friction is caused by such a disabled piston for the fuel pump.
  • FIG. 1 shows a schematic representation of an embodiment of the fuel pump according to the invention.
  • a piston 8 or plunger of the fuel pump 2 is arranged in this case.
  • this piston 8 is enclosed by a likewise arranged within the cylinder 6 conveyor spring 10.
  • FIG. 1 an inner sleeve 12 and an outer sleeve 14 which are releasably connected via a locking pin 16.
  • the piston 8 is in this case connected to the inner sleeve 12, whereas the outer sleeve 14 is connected on the one hand with a roller 18 and on the other hand with the conveyor spring 10.
  • the roller 18 is formed as a component of at least one cam gear.
  • the roller 18 is formed depending on the definition as a component of the fuel pump 2.
  • the fuel pump 2 comprises a connection module 20 having a first connection 22 and a second connection 24, wherein one of these two connections 22, 24 is designed for conveying fuel to the delivery unit.
  • the other of the two ports 22, 24, on the other hand, is adapted to direct fuel to be pressurized by the piston 8 in the cylinder 6 of the delivery unit to a fuel reservoir.
  • at least one presented fuel pump 2 and the fuel storage are formed as components of an injection system of an internal combustion engine, wherein pressurized fuel is to inject from the fuel storage in turn into at least one combustion chamber of the internal combustion engine. Since the Fuel is pressurized by the presented fuel pump 2, the fuel pump 2 is also referred to as a high-pressure pump.
  • the inner sleeve 12 and the outer sleeve 14 are either to be coupled or decoupled via the locking bolt 16. It is envisaged that a position of the locking pin 16 relative to the two sleeves 12, 14 via a locking spring not shown here, which is assigned to the locking pin 16, is set.
  • the locking pin 16 takes relative to the two sleeves 12, 14, either a basic position, which may also be referred to as a locking position, or a rest position.
  • the locking spring loads the locking pin 16 and pushes it against both sleeves 12, 14, wherein these two sleeves 12, 14 are to be joined together.
  • the inner sleeve 12 and the outer sleeve 14 form a mechanically coherent unit, wherein the piston 8 and the roller 18 are mechanically connected to each other via said mechanical unit of the two sleeves 12, 14.
  • a cam (not shown here) of the at least one cam gear rotates, which is in contact with the roller 18, its movement via the roller 18 and the interconnected sleeves 12, 14 is to be transferred to the bolt 8, the bolt 8 being inside the cylinder 6 is to set in motion.
  • fuel which is delivered to the delivery unit via one of the two ports 22, 24 is pressurized by the moving piston and further delivered to the fuel reservoir.
  • the injection system here comprises the at least one fuel pump 2, as described on the basis of FIG. 1 is shown, as well as a plurality of delivery units with a plurality of on and off switchable piston 8.
  • a plurality of delivery units with a plurality of on and off switchable piston 8.
  • the locking pin 16 is provided to switch off at least one delivery unit of the at least one fuel pump 2, depending on the fuel requirement.
  • it is provided to move the locking pin 16 starting from the basic position on the locking spring in the rest position.
  • it is provided to apply the locking spring with engine oil, wherein a force resulting from a pressure of the engine oil, counteracts a force with which the locking pin 16 is to be pressed with the locking spring in the basic position. If the force of the engine oil is greater than the force of the locking spring, the locking pin 16 is to be pressed into the inner sleeve 12, whereby a mechanical connection between the inner and the outer sleeve 12, 14 is to be separated. This also means that a mechanical connection between the piston 8 and the roller 18 is to interrupt or separate. In this case, a movement of the roller 18 is no longer transmitted to the piston 8, whereby the piston 8 is motionless at rest and the control unit is turned off.
  • FIG. 1 the outer sleeve 14 is shown in a section through a cylindrical wall of the outer sleeve 14. From the inner sleeve 12, an outside of a wall is shown. An inner side of the wall of the outer sleeve 14 is in FIG. 1 partially covered by the inner sleeve 12, the locking pin 16 and the roller 18, whereas only a portion of the inside between the locking pin 16 and the roller 18 is shown here. Also shows FIG. 1 in that the wall of the outer sleeve 14 has a hole in which one end of the locking pin 16 is arranged.

Landscapes

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

Abstract

Die Erfindung betrifft eine Kraftstoffpumpe zum Fördern von Kraftstoff, die mindestens eine Fördereinheit aufweist und mit mindestens einem Kurvengetriebe in Kontakt steht, wobei die mindestens eine Fördereinheit einen Kolben (8), eine Förderfeder (10), eine innere Hülse (12), eine äußere Hülse (14) und einen Sperrbolzen (16) aufweist, die in einem Zylinder (6) angeordnet sind, wobei die innere Hülse (12) mit dem Kolben (8) verbunden ist, wobei die äußere Hülse (14) mit der Förderfeder (10) und einer Rolle (18) des mindestens einen Kurvengetriebes in Kontakt steht, und wobei die innere Hülse (12) und die äußere Hülse (14) über den Sperrbolzen (16) lösbar miteinander zu verbinden sind.The invention relates to a fuel pump for conveying fuel, which has at least one conveyor unit and is in contact with at least one cam gear, wherein the at least one conveyor unit comprises a piston (8), a delivery spring (10), an inner sleeve (12), an outer Sleeve (14) and a locking pin (16) which are arranged in a cylinder (6), wherein the inner sleeve (12) with the piston (8) is connected, wherein the outer sleeve (14) with the conveying spring (10 ) and a roller (18) of the at least one cam gear is in contact, and wherein the inner sleeve (12) and the outer sleeve (14) via the locking pin (16) are releasably connected to each other.

Description

Die Erfindung betrifft eine Kraftstoffpumpe und ein Einspritzsystem für einen Verbrennungsmotor.The invention relates to a fuel pump and an injection system for an internal combustion engine.

Ein Kolben bzw. Stößel in einer Kraftstoffpumpe wird üblicherweise mechanisch starr über einen Nocken angetrieben. Dabei sind der Kolben und der Nocken über eine sogenannte Rollentasse miteinander verbunden. Hierbei wird ein Kontakt zwischen dem Nocken und Rollen der Rollentasse über eine Feder, die sich zwischen der Rollentasse und einem Gehäuse der Kraftstoffpumpe befindet, zu jeder Zeit sichergestellt.A piston or plunger in a fuel pump is usually driven mechanically rigidly via a cam. The piston and the cam are connected to one another via a so-called roller cup. In this case, a contact between the cam and rollers of the roller cup via a spring, which is located between the roller cup and a housing of the fuel pump, ensured at all times.

Aus der Druckschrift DE 36 42 883 A1 ist eine Kraftstoffeinspritzpumpe für eine Brennkraftmaschine mit einer beschleunigungsabhängigen Spritzverstellung beschrieben. Hierbei ist vorgesehen, einen Druck des Kraftstoffs in einem Innenraum der Kraftstoffeinspritzpumpe beschleunigungsabhängig zu variieren.From the publication DE 36 42 883 A1 a fuel injection pump for an internal combustion engine is described with an acceleration-dependent injection timing. In this case, it is provided to vary a pressure of the fuel in an interior of the fuel injection pump as a function of the acceleration.

Eine Kraftstoffeinspritzpumpe der Verteilerbauart ist in der Druckschrift US 5 161 509 A beschrieben. Die Kraftstoffeinspritzpumpe umfasst einen unter Steuerdruck stehenden Pumpeninnenraum, in dem ein Drehzahlregler angeordnet ist, über den ein Betrieb der Kraftstoffeinspritzpumpe lastabhängig einzustellen ist. Eine weitere Kraftstoffeinspritzpumpe der Verteilerbauart ist aus der Druckschrift US 5 243 943 A bekannt.A fuel injection pump of the distributor type is in the document US 5 161 509 A described. The fuel injection pump comprises a pump interior under control pressure, in which a speed regulator is arranged, via which an operation of the fuel injection pump is load-dependent to set. Another fuel injection pump of the distributor type is from the document US 5,243,943 A known.

Vor diesem Hintergrund werden eine Kraftstoffpumpe und ein Einspritzsystem mit den Merkmalen der unabhängigen Patentansprüche vorgestellt. Ausgestaltungen der Kraftstoffpumpe und des Einspritzsystems gehen aus den abhängigen Patentansprüchen und der Beschreibung hervor. Die erfindungsgemäße Kraftstoffpumpe, die auch als Hochdruckpumpe bezeichnet werden kann, ist zum Fördern von Kraftstoff zu einem Kraftstoffspeicher eines Einspritzsystems für einen Verbrennungsmotor, bspw. eines Kraftfahrzeugs, ausgebildet, wobei Kraftstoff von der Kraftstoffpumpe unter Druck zu setzen und in dem Kraftstoffspeicher unter Druck zu speichern ist. Von dem Kraftstoffspeicher aus ist der unter Druck gesetzte und/oder stehende Kraftstoff in mindestens eine Brennkammer des Verbrennungsmotors einzuspritzen.Against this background, a fuel pump and an injection system with the features of the independent claims are presented. Embodiments of the fuel pump and the injection system will become apparent from the dependent claims and the description. The fuel pump according to the invention, which can also be referred to as a high-pressure pump, is designed for conveying fuel to a fuel reservoir of an injection system for an internal combustion engine, for example a motor vehicle, pressurizing fuel from the fuel pump and storing it under pressure in the fuel reservoir is. From the fuel accumulator, the pressurized and / or standing fuel is to be injected into at least one combustion chamber of the internal combustion engine.

Diese Kraftstoffpumpe umfasst mindestens eine Fördereinheit und steht mit mindestens einem Kurvengetriebe, in der Regel mit einem Kurvengetriebe, in Kontakt. Die mindestens eine Fördereinheit weist einen Kolben, eine als Förderfeder ausgebildete Feder, eine innere Hülse und eine äußere Hülse, die in einem Zylinder zueinander koaxial angeordnet sind, sowie einen innerhalb des Zylinders angeordneten Sperrbolzen auf. Dabei ist die innere Hülse mit dem Kolben verbunden, wobei die äußere Hülse mit der Förderfeder und einer Rolle des mindestens einen Kurvengetriebes in Kontakt steht und/oder verbunden ist. Die innere Hülse und die äußere Hülse sind über den Sperrbolzen lösbar zu verbinden.This fuel pump comprises at least one conveyor unit and is in contact with at least one cam gear, usually with a cam gear. The at least one conveying unit has a piston, a spring designed as a conveying spring, an inner sleeve and an outer sleeve, which are arranged coaxially with one another in a cylinder, and a locking bolt arranged inside the cylinder. In this case, the inner sleeve is connected to the piston, wherein the outer sleeve is in contact with the conveying spring and a roller of the at least one cam gear and / or is connected. The inner sleeve and the outer sleeve are releasably connected via the locking pin.

In Ausgestaltung sind die innere Hülse und die äußere Hülse miteinander verbunden, wenn sich der Sperrbolzen in einer Grundposition befindet, wohingegen die innere Hülse und die äußere Hülse voneinander gelöst bzw. getrennt sind, wenn sich der Sperrbolzen in einer Ruheposition befindet. Befindet sich der Sperrbolzen in der Grundposition, sind der Kolben und die Rolle über die innere und äußere Hülse miteinander mechanisch verbunden. Dabei ist zwischen dem Kolben und der Rolle über die innere und äußere Hülse eine Kraft zu übertragen. Falls sich der Sperrbolzen in der Ruheposition befindet und die beiden Hülsen voneinander gelöst sind, ist eine mechanische Verbindung zwischen dem Kolben und dem Bolzen unterbrochen.In an embodiment, the inner sleeve and the outer sleeve are connected together when the locking pin is in a home position, whereas the inner sleeve and the outer sleeve are separated from each other when the locking pin is in a rest position. If the locking pin is in the home position, the piston and the roller are mechanically connected to each other via the inner and outer sleeves. It is to transmit a force between the piston and the roller on the inner and outer sleeve. If the locking pin is in the rest position and the two sleeves are detached from each other, is a mechanical connection between the piston and the bolt interrupted.

Weiterhin ist vorgesehen, dass die Rolle mit einem Nocken in Kontakt steht. Bei einer Drehung des Nockens ist die Rolle zu bewegen. Falls sich der Sperrbolzen in der Grundposition befindet, ist der Kolben ausgehend von dem Nocken über die Rolle indirekt zu bewegen. Dabei ist möglich, dass der Nocken als Komponente des mindestens einen Kurvengetriebes ausgebildet ist. Üblicherweise wirkt die Kraftstoffpumpe mit dem mindestens einen Kurvengetriebe zusammen, wobei der Kolben abhängig davon, ob sich der Sperrbolzen in der Grundposition oder in der Ruheposition befindet, ausgehend von einer Bewegung des mindestens einen Kurvengetriebes zu bewegen ist oder nicht. Je nach Definition ist mindestens eine Komponente des mindestens einen Kurvengetriebes, bspw. die Rolle, auch als Komponente der Kraftstoffpumpe ausgebildet.Furthermore, it is provided that the roller is in contact with a cam. Upon rotation of the cam, the roller is to be moved. If the locking pin is in the home position, move the piston indirectly from the cam over the roller. It is possible that the cam is formed as a component of the at least one cam gear. Usually, the fuel pump cooperates with the at least one cam gear, wherein the piston is to move depending on whether the locking pin is in the home position or in the rest position, starting from a movement of the at least one cam gear or not. Depending on the definition, at least one component of the at least one cam gear, for example the roller, is also designed as a component of the fuel pump.

In Ausgestaltung ist dem Sperrbolzen eine als Sperrfeder ausgebildete Feder zugeordnet, über die der Sperrbolzen zu belasten ist. Die Sperrfeder ist dazu ausgebildet, den Sperrbolzen in der Grundposition zu beaufschlagen, wobei die innere Hülse und die äußere Hülse über den Sperrbolzen miteinander zu verbinden sind.In an embodiment, the locking pin is assigned a spring designed as a locking spring over which the locking pin is to be loaded. The locking spring is adapted to apply the locking pin in the home position, wherein the inner sleeve and the outer sleeve are to be connected to each other via the locking pin.

Weiterhin ist die Sperrfeder mit Motorenöl, das unter Druck zu setzen ist, zu beaufschlagen. Falls eine Kraft des Motorenöls aufgrund des Drucks des Motorenöls größer als ein Grenzwert ist, ist die Sperrfeder in die innere Hülse zu drücken und der Sperrbolzen in die Ruheposition zu versetzen, wobei die innere Hülse und die äußere Hülse voneinander zu lösen sind.Furthermore, the locking spring with engine oil, which is to be pressurized to apply. If a force of the engine oil is greater than a limit due to the pressure of the engine oil, press the locking spring into the inner sleeve and set the locking pin in the rest position with the inner sleeve and outer sleeve being disengaged from each other.

Mit der mindestens einen Fördereinheit der Kraftstoffpumpe ist nur dann Kraftstoff zu fördern, wenn die innere Hülse und die äußere Hülse miteinander verbunden sind. Eine Förderung von Kraftstoff mit der mindestens einen Fördereinheit ist unterbrochen, wenn die innere Hülse und die äußere Hülse in der Ruheposition des Sperrbolzens voneinander gelöst sind.With the at least one delivery unit of the fuel pump is only to promote fuel when the inner sleeve and the outer sleeve connected to each other. A delivery of fuel with the at least one delivery unit is interrupted when the inner sleeve and the outer sleeve are released from each other in the rest position of the locking pin.

Das mindestens eine Kurvengetriebe kann variabel ausgebildet sein, wobei eine Höhe eines Hubs des Kolbens durch Einstellen des mindestens einen Kurvengetriebes zu verändern ist.The at least one cam gear may be designed to be variable, wherein a height of a stroke of the piston is to be changed by adjusting the at least one cam gear.

Das erfindungsgemäße Einspritzsystem für einen Verbrennungsmotor weist mindestens ein Modul mit zumindest einer vorgestellten Kraftstoffpumpe und einen Kraftstoffspeicher auf, wobei die zumindest eine Kraftstoffpumpe des mindestens einen Moduls dem Kraftstoffspeicher zugeordnet ist. Kraftstoff, der von der Kraftstoffpumpe unter Druck zu setzen ist, ist von der Kraftstoffpumpe aus in den Kraftstoffspeicher zu fördern und darin unter Druck zu speichern.The injection system according to the invention for an internal combustion engine has at least one module with at least one presented fuel pump and a fuel accumulator, wherein the at least one fuel pump of the at least one module is assigned to the fuel accumulator. Fuel to be pressurized by the fuel pump is to be delivered from the fuel pump into the fuel reservoir and stored therein under pressure.

Bei dem Einspritzsystem weist die zumindest eine Kraftstoffpumpe mindestens eine Fördereinheit mit einem Sperrbolzen auf, wobei mit der mindestens einen Fördereinheit Kraftstoff zu dem Kraftstoffspeicher zu fördern ist, wenn sich der Sperrbolzen in einer Grundposition befindet. Dagegen ist eine Förderung von Kraftstoff zu unterbrechen, wenn sich der Sperrbolzen in einer Ruheposition befindet.In the injection system, the at least one fuel pump has at least one delivery unit with a locking pin, wherein fuel is to be conveyed to the fuel storage with the at least one delivery unit when the locking pin is in a basic position. In contrast, a promotion of fuel is interrupted when the locking pin is in a rest position.

In Ausgestaltung weist das Einspritzsystem mehrere Fördereinheiten auf. Dabei ist in dem Einspritzsystem abhängig von einem aktuellen Lastpunkt des Verbrennungsmotors ein Teil sämtlicher Fördereinheiten zu aktivieren, wohingegen alle anderen Fördereinheiten aus- bzw. abzuschalten sind. Somit ist eine Menge an Kraftstoff, die unter Druck zu setzen und in dem Kraftstoffspeicher zu speichern ist, in Abhängigkeit einer Anzahl an jeweils aktiven und ausgeschalteten Fördereinheiten zu regulieren.In an embodiment, the injection system has a plurality of delivery units. In this case, a part of all conveyor units is to be activated in the injection system depending on a current load point of the internal combustion engine, whereas all other conveyor units are switched off or on. Thus, there is a lot of fuel to put under pressure and in the Fuel storage is to regulate depending on a number of each active and off conveyor units.

Die vorgestellte Kraftstoffpumpe weist die mindestens eine Fördereinheit und somit mindestens ein Aggregat auf, die bzw. das jeweils einen Kolben umfasst. Demnach ist es möglich, dass die Kraftstoffpumpe nicht bloß eine Fördereinheit sondern in Ausgestaltung mehrere Fördereinheiten und somit mehrere Kolben aufweist. Durch Integration eines Sperrbolzens, der einem jeweiligen Kolben sowie der inneren und äußeren Hülse als mechanisches Schaltelement zugeordnet ist, ist es möglich, auch bei laufendem Betrieb der Kraftstoffpumpe einzelne Fördereinheiten bzw. Kolben oder sämtliche Fördereinheiten auszuschalten und somit Kraftstoff nur über eine geringe Anzahl an eingeschalteten Fördereinheiten unter Druck zu setzen sowie zu fördern.The presented fuel pump has the at least one delivery unit and thus at least one unit, which in each case comprises a piston. Accordingly, it is possible that the fuel pump not only has a delivery unit but in design a plurality of delivery units and thus a plurality of pistons. By integrating a locking pin, which is associated with a respective piston and the inner and outer sleeve as a mechanical switching element, it is possible even during operation of the fuel pump individual delivery units or pistons or turn off all conveyor units and thus fuel only a small number of switched on To pressurize and convey conveyor units.

Weiterhin ist durch Integration des bspw. vollvariablen Kurvengetriebes zusätzlich eine Steuerung eines Hubs eines jeweiligen Kolbens möglich, wodurch eine Höhe des Hubs des Kolbens bedarfsgerecht zu steuern ist, wodurch auf eine ansonsten übliche Zumesseinheit zu verzichten und eine Menge an zu förderndem Kraftstoff allein durch Verändern der Höhe des Hubs des Kolbens zu steuern ist.Furthermore, by integrating the example. Fully variable cam gear in addition a control of a stroke of each piston is possible, whereby a height of the stroke of the piston is controlled as needed, thereby dispense with an otherwise common metering unit and a lot of promotional fuel alone by changing the Height of the stroke of the piston is to control.

In Ausgestaltung ist somit eine erforderliche Antriebsleistung der Kraftstoffpumpe um einen Betrag einer Reibung mindestens eines aus- bzw. abgeschalteten Kolbens zu reduzieren, wodurch in Teillasten ein Verbrauch an Kraftstoff reduziert werden kann. Somit ist eine Anzahl an Hüben mindestens eines Kolbens und eine damit verbundene Reibung nicht allein von einer Drehzahl des Verbrennungsmotors abhängig und die Kraftstoffpumpe nicht allein auf einen Bedarf an Kraftstoff des Verbrennungsmotors auszulegen. Falls bei Vorliegen einer Teillast für den Verbrennungsmotor weniger Kraftstoff erforderlich ist, ist nunmehr möglich, lediglich einen Teil sämtlicher Fördereinheiten zu betreiben. Dabei ist alternativ oder ergänzend möglich, einen betriebenen Kolben in Vollförderung oder in Teilförderung zu betreiben.In an embodiment, a required drive power of the fuel pump is thus to be reduced by an amount of friction of at least one off or deactivated piston, as a result of which fuel consumption can be reduced in partial loads. Thus, a number of strokes of at least one piston and a friction associated therewith is not dependent solely on a speed of the engine and the fuel pump is not designed solely for a need for fuel of the internal combustion engine. If there is a partial load for the Internal combustion engine requires less fuel, it is now possible to operate only a part of all conveyor units. It is alternatively or additionally possible to operate an operated piston in full funding or partial funding.

Die Kraftstoffpumpe ist als sogenannte Steckpumpe ausgebildet und/oder zu bezeichnen. Diese Kraftstoffpumpe umfasst in Ausgestaltung mehrere Kolben und ist bei laufendem Betrieb teilweise stillzulegen, wenn ein Teil der Kolben der Kraftstoffpumpe abgestellt ist. Dem Kraftstoffspeicher, der auch als Common-Rail bezeichnet wird, sind je nach Definition mehrere Fördereinheiten mit Kolben als Komponenten mindestens einer Kraftstoffpumpe zugeordnet. Bei dem Betrieb des Einspritzsystems ist nur eine für einen jeweiligen Lastpunkt notwendige Anzahl an Fördereinheiten mit Kolben zu aktivieren und eine reduzierte Menge an Kraftstoff unter Druck zu setzen und in dem Kraftstoffspeicher zu speichern.The fuel pump is designed and / or designated as a so-called plug-in pump. This fuel pump comprises in design a plurality of pistons and is partially shut down during operation, when a part of the piston of the fuel pump is turned off. The fuel storage, which is also referred to as a common rail, depending on the definition, several delivery units with pistons are assigned as components of at least one fuel pump. In the operation of the injection system is only necessary for a given load point number of conveyor units with pistons to activate and set a reduced amount of fuel under pressure and store in the fuel tank.

Bei der vorgestellten Kraftstoffpumpe ist eine Hülse, die üblicherweise als Rollentasse bezeichnet wird, und über die zwischen der Rolle, die mit einem Nocken in Kontakt steht, und dem Kolben bzw. einem Stößel eine Verbindung herzustellen ist, durch Vorsehen der inneren Hülse und der äußeren Hülse zweiteilig ausgeführt. Dabei ist die innere Hülse von der und/oder in der äußeren Hülse geführt, wobei die äußere Hülse mit der Rolle und der Förderfeder in Kontakt steht. Dagegen ist die innere Hülse mit dem Kolben der Kraftstoffpumpe verbunden. Die Verbindung zwischen der inneren und der äußeren Hülse wird mit dem beschriebenen Sperrbolzen bereitgestellt, der durch die Sperrfeder federbelastet ist. In der Grundposition befindet sich der Sperrbolzen aufgrund einer durch die Sperrfeder auf den Sperrbolzen wirkenden Kraft in einer Sperrposition. Dabei sind die innere und die äußere Hülse miteinander starr verbunden. In diesem Fall ist es möglich, dass sich der Kolben über die innere und die äußere Hülse, die hier miteinander verbunden sind, in Wirkkontakt mit der Rolle und somit auch indirekt mit dem Nocken befindet, wobei über den Kolben Kraftstoff zu führen und/oder unter Druck zu setzen ist.In the presented fuel pump is a sleeve, which is commonly referred to as a roll cup, and to connect between the roller, which is in contact with a cam, and the piston or a plunger, by providing the inner sleeve and the outer Sleeve made in two parts. In this case, the inner sleeve is guided by and / or in the outer sleeve, wherein the outer sleeve is in contact with the roller and the delivery spring. In contrast, the inner sleeve is connected to the piston of the fuel pump. The connection between the inner and the outer sleeve is provided with the described locking pin, which is spring-loaded by the locking spring. In the home position, the locking pin is in a locking position due to a force acting on the locking pin by the locking spring. The inner and outer sleeves are rigidly connected to each other. In this case, it is possible that the piston over the inner and the outer sleeve, here are connected to each other, in operative contact with the roller and thus also indirectly with the cam is to lead over the piston fuel and / or to put under pressure.

Alternativ ist möglich, den Kolben auszuschalten. Hierzu wird der Sperrbolzen von außen mit Motorenöl, das unter hydraulischem Druck steht, beaufschlagt. Dabei wirkt dieser Druck bzw. eine entsprechende Kraft entgegen einer Kraft der Sperrfeder, die den Sperrbolzen ansonsten in seiner Grundposition hält. Aufgrund des Drucks des Motorenöls, wird der Sperrbolzen in die innere Hülse gedrückt. Somit ergibt sich, dass die Verbindung zwischen der äußeren und der inneren Hülse gelöst wird. In diesem Fall folgt die äußere Hülse unter Einwirkung einer Kraft der Förderfeder über die Rolle einer Kontur des Nockens. Alternativ befindet sich der Sperrbolzen in der Ruheposition. Dabei ist der Kolben von der Rolle und somit auch von dem Nocken entkoppelt und somit ausgeschaltet und fördert keinen Kraftstoff mehr. Weiterhin wird durch einen derart ausgeschalteten Kolben für die Kraftstoffpumpe keine Reibung verursacht.Alternatively it is possible to switch off the piston. For this purpose, the locking pin is acted upon from the outside with engine oil, which is under hydraulic pressure. In this case, this pressure or a corresponding force counteracts a force of the locking spring, which otherwise holds the locking pin in its basic position. Due to the pressure of the engine oil, the locking pin is pressed into the inner sleeve. Thus, it follows that the connection between the outer and the inner sleeve is released. In this case, the outer sleeve follows under the action of a force of the conveying spring on the role of a contour of the cam. Alternatively, the locking pin is in the rest position. The piston is decoupled from the roller and thus also from the cam and thus switched off and no longer promotes fuel. Furthermore, no friction is caused by such a disabled piston for the fuel pump.

Weitere Vorteile und Ausgestaltungen der Erfindung ergeben sich aus der Beschreibung und der beiliegenden Zeichnung.Further advantages and embodiments of the invention will become apparent from the description and the accompanying drawings.

Es versteht sich, dass die voranstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, ohne den Rahmen der vorliegenden Erfindung zu verlassen.It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination indicated, but also in other combinations or in isolation, without departing from the scope of the present invention.

Die Erfindung ist anhand einer Ausführungsform in der Zeichnung schematisch dargestellt und wird unter Bezugnahme auf die Zeichnung schematisch und ausführlich beschrieben.The invention is illustrated schematically with reference to an embodiment in the drawing and will be described schematically and in detail with reference to the drawing.

Figur 1 zeigt in schematischer Darstellung eine Ausführungsform der erfindungsgemäßen Kraftstoffpumpe. FIG. 1 shows a schematic representation of an embodiment of the fuel pump according to the invention.

Die in Figur 1 schematisch dargestellte Ausführungsform der erfindungsgemäßen Kraftstoffpumpe 2 umfasst ein Gehäuse 4, das einen Zylinder 6 einer Fördereinheit umschließt. In diesem Zylinder ist ein Kolben 8 bzw. Stößel der Kraftstoffpumpe 2 angeordnet. Hierbei ist dieser Kolben 8 von einer ebenfalls innerhalb des Zylinders 6 angeordneten Förderfeder 10 umschlossen. Weiterhin zeigt Figur 1 eine innere Hülse 12 und eine äußere Hülse 14, die über einen Sperrbolzen 16 lösbar zu verbinden sind. Der Kolben 8 ist hierbei mit der inneren Hülse 12 verbunden, wohingegen die äußere Hülse 14 einerseits mit einer Rolle 18 und andererseits mit der Förderfeder 10 verbunden ist. Dabei ist die Rolle 18 als Komponente von mindestens einem Kurvengetriebe ausgebildet. In Ausgestaltung ist die Rolle 18 je nach Definition auch als Komponente der Kraftstoffpumpe 2 ausgebildet.In the FIG. 1 schematically illustrated embodiment of the fuel pump 2 according to the invention comprises a housing 4, which encloses a cylinder 6 of a conveyor unit. In this cylinder, a piston 8 or plunger of the fuel pump 2 is arranged. In this case, this piston 8 is enclosed by a likewise arranged within the cylinder 6 conveyor spring 10. Further shows FIG. 1 an inner sleeve 12 and an outer sleeve 14 which are releasably connected via a locking pin 16. The piston 8 is in this case connected to the inner sleeve 12, whereas the outer sleeve 14 is connected on the one hand with a roller 18 and on the other hand with the conveyor spring 10. In this case, the roller 18 is formed as a component of at least one cam gear. In an embodiment, the roller 18 is formed depending on the definition as a component of the fuel pump 2.

Ferner umfasst die Kraftstoffpumpe 2 ein Anschlussmodul 20 mit einem ersten Anschluss 22 und einem zweiten Anschluss 24, wobei einer dieser beiden Anschlüsse 22, 24 zum Fördern von Kraftstoff zu der Fördereinheit ausgebildet ist. Der andere der beiden Anschlüsse 22, 24 ist dagegen dazu ausgebildet, Kraftstoff, der von dem Kolben 8 in dem Zylinder 6 der Fördereinheit unter Druck zu setzen ist, zu einem Kraftstoffspeicher zu leiten. Hierbei ist vorgesehen, dass mindestens eine vorgestellte Kraftstoffpumpe 2 und der Kraftstoffspeicher als Komponenten eines Einspritzsystems eines Verbrennungsmotors ausgebildet sind, wobei unter Druck stehender Kraftstoff ausgehend von dem Kraftstoffspeicher wiederum in mindestens eine Brennkammer des Verbrennungsmotors einzuspritzen ist. Da der Kraftstoff von der vorgestellten Kraftstoffpumpe 2 unter Druck gesetzt wird, wird die Kraftstoffpumpe 2 auch als Hochdruckpumpe bezeichnet.Furthermore, the fuel pump 2 comprises a connection module 20 having a first connection 22 and a second connection 24, wherein one of these two connections 22, 24 is designed for conveying fuel to the delivery unit. The other of the two ports 22, 24, on the other hand, is adapted to direct fuel to be pressurized by the piston 8 in the cylinder 6 of the delivery unit to a fuel reservoir. It is provided that at least one presented fuel pump 2 and the fuel storage are formed as components of an injection system of an internal combustion engine, wherein pressurized fuel is to inject from the fuel storage in turn into at least one combustion chamber of the internal combustion engine. Since the Fuel is pressurized by the presented fuel pump 2, the fuel pump 2 is also referred to as a high-pressure pump.

Bei der Kraftstoffpumpe 2 ist vorgesehen, dass die innere Hülse 12 und die äußerere Hülse 14 über den Sperrbolzen 16 entweder zu koppeln oder zu entkoppeln sind. Dabei ist vorgesehen, dass eine Stellung des Sperrbolzens 16 relativ zu den beiden Hülsen 12, 14 über eine hier nicht weiter dargestellte Sperrfeder, die dem Sperrbolzen 16 zugeordnet ist, einzustellen ist. Der Sperrbolzen 16 nimmt relativ zu den beiden Hülsen 12, 14 entweder eine Grundposition, die auch als Sperrposition bezeichnet werden kann, oder eine Ruheposition ein.In the case of the fuel pump 2, it is provided that the inner sleeve 12 and the outer sleeve 14 are either to be coupled or decoupled via the locking bolt 16. It is envisaged that a position of the locking pin 16 relative to the two sleeves 12, 14 via a locking spring not shown here, which is assigned to the locking pin 16, is set. The locking pin 16 takes relative to the two sleeves 12, 14, either a basic position, which may also be referred to as a locking position, or a rest position.

In der Grundposition belastet die Sperrfeder den Sperrbolzen 16 und drückt diesen gegen beide Hülsen 12, 14, wobei diese beiden Hülsen 12, 14 miteinander zu verbinden sind. In diesem Fall bilden die innere Hülse 12 und die äußerere Hülse 14 eine mechanisch zusammenhängende Einheit, wobei der Kolben 8 und die Rolle 18 über diese besagte mechanische Einheit aus den beiden Hülsen 12, 14 miteinander mechanisch verbunden sind. Dreht sich ein hier nicht dargestellter Nocken des mindestens einen Kurvengetriebes, welcher mit der Rolle 18 in Kontakt steht, ist dessen Bewegung über die Rolle 18 und die miteinander verbundenen Hülsen 12, 14 auf den Bolzen 8 zu übertragen, wobei der Bolzen 8 innerhalb des Zylinders 6 in Bewegung zu versetzen ist. Dadurch wird Kraftstoff, der über einen der beiden Anschlüsse 22, 24 zu der Fördereinheit gefördert wird, von dem sich bewegenden Kolben unter Druck gesetzt und weiterhin zu dem Kraftstoffspeicher gefördert.In the basic position, the locking spring loads the locking pin 16 and pushes it against both sleeves 12, 14, wherein these two sleeves 12, 14 are to be joined together. In this case, the inner sleeve 12 and the outer sleeve 14 form a mechanically coherent unit, wherein the piston 8 and the roller 18 are mechanically connected to each other via said mechanical unit of the two sleeves 12, 14. If a cam (not shown here) of the at least one cam gear rotates, which is in contact with the roller 18, its movement via the roller 18 and the interconnected sleeves 12, 14 is to be transferred to the bolt 8, the bolt 8 being inside the cylinder 6 is to set in motion. As a result, fuel which is delivered to the delivery unit via one of the two ports 22, 24 is pressurized by the moving piston and further delivered to the fuel reservoir.

Das Einspritzsystem umfasst hier die mindestens eine Kraftstoffpumpe 2, wie sie anhand von Figur 1 gezeigt ist, sowie mehrere Fördereinheiten mit mehreren ein- und ausschaltbaren Kolben 8. Bei einem Betrieb des Verbrennungsmotors ist möglich, dass eine Menge an Kraftstoff, der in dem Kraftstoffspeicher unter Druck gesetzt und in die mindestens eine Brennkammer des Verbrennungsmotors einzuspritzen ist, zu reduzieren ist.The injection system here comprises the at least one fuel pump 2, as described on the basis of FIG. 1 is shown, as well as a plurality of delivery units with a plurality of on and off switchable piston 8. In an operation of the Internal combustion engine is possible to reduce an amount of fuel to be pressurized in the fuel reservoir and to be injected into the at least one combustion chamber of the internal combustion engine.

In diesem Fall ist vorgesehen, je nach Bedarf an Kraftstoff mindestens eine Fördereinheit der mindestens einen Kraftstoffpumpe 2 auszuschalten. Hierzu ist vorgesehen, den Sperrbolzen 16 ausgehend von der Grundposition über die Sperrfeder in die Ruheposition zu versetzen. Zudem ist vorgesehen, die Sperrfeder mit Motorenöl zu beaufschlagen, wobei eine Kraft, die aus einem Druck des Motorenöls resultiert, einer Kraft entgegenwirkt, mit der der Sperrbolzen 16 mit der Sperrfeder in die Grundposition zu drücken ist. Ist die Kraft des Motorenöls größer als jene Kraft der Sperrfeder, ist der Sperrbolzen 16 in die innere Hülse 12 zu drücken, wodurch eine mechanische Verbindung zwischen der inneren und der äußeren Hülse 12, 14 zu trennen ist. Dies bedeutet auch, dass eine mechanische Verbindung zwischen dem Kolben 8 und der Rolle 18 zu unterbrechen bzw. zu trennen ist. In diesem Fall wird eine Bewegung der Rolle 18 nicht mehr auf den Kolben 8 übertragen, wodurch sich der Kolben 8 bewegungslos in Ruhe befindet und die Steuereinheit ausgeschaltet ist.In this case, it is provided to switch off at least one delivery unit of the at least one fuel pump 2, depending on the fuel requirement. For this purpose, it is provided to move the locking pin 16 starting from the basic position on the locking spring in the rest position. In addition, it is provided to apply the locking spring with engine oil, wherein a force resulting from a pressure of the engine oil, counteracts a force with which the locking pin 16 is to be pressed with the locking spring in the basic position. If the force of the engine oil is greater than the force of the locking spring, the locking pin 16 is to be pressed into the inner sleeve 12, whereby a mechanical connection between the inner and the outer sleeve 12, 14 is to be separated. This also means that a mechanical connection between the piston 8 and the roller 18 is to interrupt or separate. In this case, a movement of the roller 18 is no longer transmitted to the piston 8, whereby the piston 8 is motionless at rest and the control unit is turned off.

Bei der Darstellung aus Figur 1 ist die äußere Hülse 14 in einem Schnitt durch eine zylinderförmige Wandung der äußeren Hülse 14 gezeigt. Von der inneren Hülse 12 ist eine Außenseite einer Wandung gezeigt. Eine Innenseite der Wandung der äußeren Hülse 14 ist in Figur 1 durch die innere Hülse 12, den Sperrbolzen 16 und die Rolle 18 teilweise abgedeckt, wohingegen hier nur ein Abschnitt der Innenseite zwischen dem Sperrbolzen 16 und der Rolle 18 gezeigt ist. Außerdem zeigt Figur 1, dass die Wandung der äußeren Hülse 14 ein Loch aufweist, in dem ein Ende des Sperrbolzens 16 angeordnet ist.In the presentation off FIG. 1 the outer sleeve 14 is shown in a section through a cylindrical wall of the outer sleeve 14. From the inner sleeve 12, an outside of a wall is shown. An inner side of the wall of the outer sleeve 14 is in FIG. 1 partially covered by the inner sleeve 12, the locking pin 16 and the roller 18, whereas only a portion of the inside between the locking pin 16 and the roller 18 is shown here. Also shows FIG. 1 in that the wall of the outer sleeve 14 has a hole in which one end of the locking pin 16 is arranged.

Claims (8)

Kraftstoffpumpe zum Fördern von Kraftstoff, die mindestens eine Fördereinheit aufweist und mit mindestens einem Kurvengetriebe in Kontakt steht, wobei die mindestens eine Fördereinheit einen Kolben (8), eine Förderfeder (10), eine innere Hülse (12), eine äußere Hülse (14) und einen Sperrbolzen (16) aufweist, die in einem Zylinder (6) angeordnet sind, wobei die innere Hülse (12) mit dem Kolben (8) verbunden ist, wobei die äußere Hülse (14) mit der Förderfeder (10) und einer Rolle (18) des mindestens einen Kurvengetriebes in Kontakt steht, und wobei die innere Hülse (12) und die äußere Hülse (14) über den Sperrbolzen (16) lösbar miteinander zu verbinden sind.Fuel pump for conveying fuel, which has at least one conveying unit and is in contact with at least one cam gear, wherein the at least one conveying unit comprises a piston (8), a conveying spring (10), an inner sleeve (12), an outer sleeve (14). and a locking pin (16) disposed in a cylinder (6), the inner sleeve (12) being connected to the piston (8), the outer sleeve (14) being connected to the spring (10) and a roller (18) of the at least one cam gear is in contact, and wherein the inner sleeve (12) and the outer sleeve (14) via the locking pin (16) are releasably connected to each other. Kraftstoffpumpe nach Anspruch 1, bei der die innere Hülse (12) und die äußere Hülse (14) miteinander verbunden sind, wenn sich der Sperrbolzen (16) in einer Grundposition befindet, und bei der die innere Hülse (14) und die äußere Hülse (14) voneinander gelöst sind, wenn sich der Sperrbolzen (16) in einer Ruheposition befindet.A fuel pump according to claim 1, wherein said inner sleeve (12) and said outer sleeve (14) are interconnected when said locking pin (16) is in a home position, and wherein said inner sleeve (14) and said outer sleeve (14) 14) are released from each other when the locking pin (16) is in a rest position. Kraftstoffpumpe nach Anspruch 2, bei der dem Sperrbolzen (16) eine Sperrfeder zugeordnet ist, über die der Sperrbolzen (16) zu belasten ist, wobei die Sperrfeder dazu ausgebildet ist, den Sperrbolzen (16) in der Grundposition zu beaufschlagen, wobei die innere Hülse (12) und die äußere Hülse (14) über den Sperrbolzen (16) miteinander zu verbinden sind, und wobei die Sperrfeder mit Motorenöl, das unter Druck zu setzen ist, zu beaufschlagen ist, wobei für den Fall, dass eine Kraft des Motorenöls aufgrund des Drucks des Motorenöls größer als ein Grenzwert ist, die Sperrfeder in die innere Hülse (12) zu drücken und der Sperrbolzen (16) in die Ruheposition zu versetzen ist, wobei die innere Hülse (12) und die äußere Hülse (14) voneinander zu lösen sind.Fuel pump according to claim 2, wherein the locking pin (16) is associated with a locking spring over which the locking pin (16) is to be loaded, wherein the locking spring is adapted to bias the locking pin (16) in the home position, wherein the inner sleeve (12) and the outer sleeve (14) via the locking pin (16) are to be connected to each other, and wherein the locking spring is to be acted upon with engine oil, which is to be pressurized, wherein in the event that a force of the engine oil due the pressure of the engine oil is greater than a limit, the locking spring in the inner sleeve (12) to push and the locking pin (16) is to put in the rest position, wherein the inner sleeve (12) and the outer sleeve (14) from each other are solved. Kraftstoffpumpe nach einem der voranstehenden Ansprüche, bei der mit der mindestens einen Fördereinheit nur dann Kraftstoff zu fördern ist, wenn die innere Hülse (12) und die äußere Hülse (14) miteinander verbunden sind, wobei eine Förderung von Kraftstoff mit der mindestens einen Fördereinheit zu unterbrechen ist, wenn die innere Hülse (14) und die äußere Hülse (14) voneinander gelöst sind.Fuel pump according to one of the preceding claims, in which the fuel is to be conveyed with the at least one delivery unit only if the inner sleeve (12) and the outer sleeve (14) are connected to one another, wherein a delivery of fuel with the at least one delivery unit is interrupt when the inner sleeve (14) and the outer sleeve (14) are detached from each other. Kraftstoffpumpe nach einem der voranstehenden Ansprüche, für die vorgesehen ist, dass das mindestens eine Kurvengetriebe variabel ausgebildet ist, wobei eine Höhe eines Hubs des Kolbens (8) zu verändern ist.Fuel pump according to one of the preceding claims, for which it is provided that the at least one cam gear is variably formed, wherein a height of a stroke of the piston (8) is to be changed. Einspritzsystem für einen Verbrennungsmotor, das mindestens ein Modul mit zumindest einer Kraftstoffpumpe (2) nach einem der voranstehenden Ansprüche und einen Kraftstoffspeicher aufweist, wobei die zumindest eine Kraftstoffpumpe (2) des mindestens einen Moduls dem Kraftstoffspeicher zugeordnet ist.An injection system for an internal combustion engine having at least one module with at least one fuel pump (2) according to one of the preceding claims and a fuel reservoir, wherein the at least one fuel pump (2) of the at least one module is associated with the fuel reservoir. Einspritzsystem nach Anspruch 6, bei dem die zumindest eine Kraftstoffpumpe (2) mindestens eine Fördereinheit mit einem Sperrbolzen (16) aufweist, wobei mit der mindestens einen Fördereinheit Kraftstoff zu dem Kraftstoffspeicher zu fördern ist, wenn sich der Sperrbolzen (16) in einer Grundposition befindet, und wobei eine Förderung von Kraftstoff zu unterbrechen ist, wenn sich der Sperrbolzen (16) in einer Ruheposition befindet.An injection system according to claim 6, wherein the at least one fuel pump (2) comprises at least one delivery unit with a locking pin (16), wherein with the at least one delivery unit fuel is to be conveyed to the fuel storage when the locking pin (16) is in a home position , and wherein a delivery of fuel is to be interrupted when the locking pin (16) is in a rest position. Einspritzsystem nach Anspruch 6 oder 7, bei dem abhängig von einem aktuellen Lastpunkt des Verbrennungsmotors ein Anzahl an Fördereinheiten zu aktivieren ist, wohingegen andere Fördereinheiten auszuschalten sind.An injection system according to claim 6 or 7, wherein, depending on a current load point of the internal combustion engine, a number of conveyor units is to be activated, whereas other conveyor units are to be switched off.
EP16198196.4A 2015-12-24 2016-11-10 Fuel pump Active EP3184797B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3642883A1 (en) 1986-12-16 1988-06-30 Kloeckner Humboldt Deutz Ag Injection pump for internal combustion engines with acceleration-controlled injection timing (BAS) especially in vehicle engines
US5161509A (en) 1989-12-29 1992-11-10 Robert Bosch Gmbh Fuel injection pump
US5243943A (en) 1989-12-29 1993-09-14 Robert Bosch Gmbh Fuel injection pump

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5709180A (en) * 1997-02-06 1998-01-20 General Motors Corporation Narrow cam two-step lifter
DK173815B1 (en) 1997-05-28 2001-11-12 Man B & W Diesel As Hydraulically activated fuel pump for an internal combustion engine
US6497207B2 (en) * 2000-10-20 2002-12-24 Delphi Technologies, Inc. Deactivation roller hydraulic valve lifter
DE10233825A1 (en) * 2002-07-25 2004-02-12 Daimlerchrysler Ag Piston pump for fuel in internal combustion engine has tappet drive component constructed as cam with first and second cam track which differ in height of their amplitudes with regard to cam axis and/or in number of amplitudes
US6866014B2 (en) * 2003-04-24 2005-03-15 Delphi Technologies, Inc. Anti-rotation guide for a deactivation hydraulic valve lifter
US7055479B2 (en) * 2003-12-20 2006-06-06 Ina-Schaeffler Kg Coupling mechanism
JPWO2005068823A1 (en) * 2004-01-14 2007-12-27 ボッシュ株式会社 Fuel supply pump
JP4466340B2 (en) * 2004-11-18 2010-05-26 トヨタ自動車株式会社 Fuel supply device
EP2063093A1 (en) * 2007-11-26 2009-05-27 Delphi Technologies, Inc. Fuel injection system
US7792629B2 (en) * 2007-12-19 2010-09-07 Gm Global Technology Operations, Inc. High pressure pump actuation in a vehicle
FR2998929B1 (en) * 2012-11-30 2018-08-10 Valeo Systemes De Controle Moteur PUMP, IN PARTICULAR FOR THE INJECTION OF FUEL IN A THERMAL ENGINE

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3642883A1 (en) 1986-12-16 1988-06-30 Kloeckner Humboldt Deutz Ag Injection pump for internal combustion engines with acceleration-controlled injection timing (BAS) especially in vehicle engines
US5161509A (en) 1989-12-29 1992-11-10 Robert Bosch Gmbh Fuel injection pump
US5243943A (en) 1989-12-29 1993-09-14 Robert Bosch Gmbh Fuel injection pump

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US20170184064A1 (en) 2017-06-29
US10247154B2 (en) 2019-04-02
EP3184797B1 (en) 2019-08-14
DE102015016925A1 (en) 2017-06-29
CN106948986A (en) 2017-07-14

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