EP3184797A2 - Pompe à carburant - Google Patents

Pompe à carburant 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)
English (en)
Other versions
EP3184797A3 (fr
EP3184797B1 (fr
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/fr
Publication of EP3184797A3 publication Critical patent/EP3184797A3/fr
Application granted granted Critical
Publication of EP3184797B1 publication Critical patent/EP3184797B1/fr
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)
EP16198196.4A 2015-12-24 2016-11-10 Pompe à carburant Active EP3184797B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015016925.4A DE102015016925A1 (de) 2015-12-24 2015-12-24 Kraftstoffpumpe

Publications (3)

Publication Number Publication Date
EP3184797A2 true EP3184797A2 (fr) 2017-06-28
EP3184797A3 EP3184797A3 (fr) 2017-07-12
EP3184797B1 EP3184797B1 (fr) 2019-08-14

Family

ID=57286325

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16198196.4A Active EP3184797B1 (fr) 2015-12-24 2016-11-10 Pompe à carburant

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US (1) US10247154B2 (fr)
EP (1) EP3184797B1 (fr)
CN (1) CN106948986A (fr)
DE (1) DE102015016925A1 (fr)

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GB2571934A (en) * 2018-03-12 2019-09-18 Delphi Automotive Systems Lux High pressure multi-mode fuel pump system

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DE3642883A1 (de) 1986-12-16 1988-06-30 Kloeckner Humboldt Deutz Ag Einspritzpumpe fuer brennkraftmaschinen mit beschleunigungs-abhaengiger-spritzverstellung (bas) insbesondere bei fahrzeugmotoren
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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US6497207B2 (en) * 2000-10-20 2002-12-24 Delphi Technologies, Inc. Deactivation roller hydraulic valve lifter
DE10233825A1 (de) * 2002-07-25 2004-02-12 Daimlerchrysler Ag Schaltbare Pumpenvorrichtung
US6866014B2 (en) * 2003-04-24 2005-03-15 Delphi Technologies, Inc. Anti-rotation guide for a deactivation hydraulic valve lifter
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WO2005068823A1 (fr) * 2004-01-14 2005-07-28 Bosch Corporation Pompe d'alimentation en carburant
JP4466340B2 (ja) * 2004-11-18 2010-05-26 トヨタ自動車株式会社 燃料供給装置
EP2063093A1 (fr) * 2007-11-26 2009-05-27 Delphi Technologies, Inc. Système d'injection de carburant
US7792629B2 (en) * 2007-12-19 2010-09-07 Gm Global Technology Operations, Inc. High pressure pump actuation in a vehicle
FR2998929B1 (fr) * 2012-11-30 2018-08-10 Valeo Systemes De Controle Moteur Pompe, notamment pour l'injection de carburant dans un moteur thermique

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DE3642883A1 (de) 1986-12-16 1988-06-30 Kloeckner Humboldt Deutz Ag Einspritzpumpe fuer brennkraftmaschinen mit beschleunigungs-abhaengiger-spritzverstellung (bas) insbesondere bei fahrzeugmotoren
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

Also Published As

Publication number Publication date
EP3184797A3 (fr) 2017-07-12
US10247154B2 (en) 2019-04-02
US20170184064A1 (en) 2017-06-29
CN106948986A (zh) 2017-07-14
EP3184797B1 (fr) 2019-08-14
DE102015016925A1 (de) 2017-06-29

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