WO2004027250A1 - Dispositif d'injection de carburant pour moteur à combustion interne - Google Patents

Dispositif d'injection de carburant pour moteur à combustion interne Download PDF

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Publication number
WO2004027250A1
WO2004027250A1 PCT/DE2003/000878 DE0300878W WO2004027250A1 WO 2004027250 A1 WO2004027250 A1 WO 2004027250A1 DE 0300878 W DE0300878 W DE 0300878W WO 2004027250 A1 WO2004027250 A1 WO 2004027250A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel injection
control piston
injection system
control
throttle
Prior art date
Application number
PCT/DE2003/000878
Other languages
German (de)
English (en)
Inventor
Achim Koehler
Sascha Ambrock
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2004027250A1 publication Critical patent/WO2004027250A1/fr

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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
    • 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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0054—Check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • 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
    • F02M59/46—Valves
    • 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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/005—Pressure relief valves
    • 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
    • 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
    • F02M63/023—Means for varying pressure in common rails
    • F02M63/0235—Means for varying pressure in common rails by bleeding fuel pressure
    • F02M63/0245—Means for varying pressure in common rails by bleeding fuel pressure between the high pressure pump and the common rail
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/24—Fuel-injection apparatus with sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/60—Fuel-injection apparatus having means for facilitating the starting of engines, e.g. with valves or fuel passages for keeping residual pressure in common rails
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/007—Venting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/04—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
    • F02M59/06—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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
    • F02M63/0001—Fuel-injection apparatus with specially arranged lubricating system, e.g. by fuel oil
    • 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
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • 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
    • F02M63/0012—Valves
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0028—Valves characterised by the valve actuating means hydraulic
    • 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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • 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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0043—Two-way valves

Definitions

  • the invention relates to a fuel injection system for an internal combustion engine, in particular a common-rail fuel injection system, with a high-pressure fuel pump with at least one pump element and with a pre-feed pump, the Vor fundamentalpu pumping fuel from a tank to the suction side of the pump element (s) and with the pre-feed pump delivered fuel amount is passed through a metering unit to the high-pressure fuel pump.
  • An emergency driving program can be activated. This emergency driving program can, for example, switch off the internal combustion engine by the
  • a control unit with. a high-pressure fuel pump, with at least one pump element and with a prefeed pump, the
  • Pre-feed pump conveys fuel from a tank to the suction side of the pump element (s) and the amount of fuel delivered by the pre-feed pump is passed through a metering unit to the pump element (s) between the pressure side
  • High-pressure fuel pump and a low-pressure area of the fuel injection system means for discharging a leak.
  • the means according to the invention for discharging a leak can be designed as an orifice or throttle.
  • the following is related to. the invention uses only the term "choke”. However, we always mean both Chokes as well as orifices.
  • the means for discharging a leak are designed as a 2-way flow control valve, so that the amount of leakage is independent of that on the pressure side of the
  • the flow through the 2-way flow control valve is electrically adjustable, so that the 2-way flow control valve according to the invention is controlled by a control unit
  • Fuel injection system can be controlled and thus the operating behavior of the 'fuel injection system according to the invention is further improved.
  • the fuel injection system can also optimize the control concept of the fuel injection system if there is no coasting operation as follows:
  • High-pressure fuel pump specified depending on the operating point of the internal combustion engine The pressure prevailing in the common rail can then be adjusted very precisely and sensitively by means of the electrically controllable 2-way flow control valve, so that the quality of the pressure control in the pressure range of the fuel injection system according to the invention is further improved by suitable control of the 2-way flow control valve.
  • the 2-way flow control valve can also be designed as a hydraulically controlled valve and a control piston guided in a housing with a
  • Control throttle more or less closes depending on the hydraulic forces acting on the control piston.
  • control piston can have a control needle instead of a control edge, which closes the control throttle more or less depending on the hydraulic forces acting on the control piston.
  • Both embodiments have in common that the amount of leakage is kept constant almost independently of the pressure prevailing on the pressure side of the high-pressure fuel pump, and thus the energy losses resulting from the removal of the amount of leakage from the high-pressure area of the fuel injection system according to the invention are minimized.
  • Measuring throttle is arranged upstream of the control throttle.
  • control piston is brought into contact with a paragraph fixed to the housing by the compression spring in the unpressurized state and closes the paragraph, so that the 2-stage flow control valve according to the invention only opens when a certain pressure is reached and thus the pressure builds up the commissioning of the fuel injection system according to the invention is improved.
  • the pressure above which the 2-way flow control valve according to the invention opens can be increased further.
  • the means for discharging a leak can be arranged on the common rail or the high-pressure fuel pump of the fuel injection system according to the invention.
  • Figure 1 shows an embodiment of a fuel injection system according to the invention
  • FIG. 2 to 4 embodiments of adjustable chokes according to the invention.
  • FIG. 1 An exemplary embodiment of a common rail injection system according to the invention is shown schematically in FIG.
  • a prefeed pump 1 draws fuel (not shown) from a tank 5 via an inlet line 3.
  • the fuel is filtered in a filter 7.
  • the prefeed pump 1 can be designed, for example, as a gear pump and has a first pressure relief valve 11. On the suction side, the pre-feed pump 1 is throttled by a first throttle 13. A print page 15 of the
  • Pre-feed pump 1 supplies a high-pressure fuel pump 17 with fuel.
  • the high-pressure fuel pump 17 is designed as a radial piston pump with three pump elements 19 and drives the prefeed pump 1.
  • a suction valve 21 is provided on the suction side of the pump elements 19.
  • a check valve 23 is provided on the pressure side of the pump elements 19, which prevents the fuel under high pressure, which was pumped into a common rail 25 by the pump elements 19, from flowing back into the pump elements 19.
  • a pressure sensor 26 is provided on the common rail 25 and is used for pressure control.
  • the high-pressure lines of the fuel injection system are shown in FIGS. 1 and 2 with thick lines, while the areas of the fuel injection system under low pressure are shown with thin lines.
  • the common rail 25 supplies one or more in FIG. 1 not injectors illustrated with fuel via a respective high pressure line 27.
  • An adjustable choke 28 can, if required, the pressure side of the high-pressure fuel pump 17 with a return line 29 connected via the return line 29 and a leakage line '31, the leakage and the control quantities of the injector or injectors, not shown in returned the tank 5.
  • the high-pressure fuel pump 17 is supplied by the prefeed pump 1 on the one hand via a fuel line 33 with fuel for the pump elements 19 and on the other hand via a supply line 35 with fuel for lubrication.
  • a 'metering unit 37 is arranged in the fuel line 33 and, together with the adjustable throttle 28, takes over the delivery rate control of the high-pressure fuel pump 17 and the pressure control of the Com on-Rail 25.
  • the control concept is described in more detail below.
  • the fuel line 33 opens into a
  • Distribution line 39 via which the pump elements 19 are supplied with fuel.
  • Fuel, one or more leakage lines 41 are provided, each with a third throttle 43.
  • the leakage lines 41 open into the return line 29.
  • a check valve 45 and a fourth throttle 47 are provided in the supply line 35.
  • a vent throttle 49 is provided upstream of the fourth throttle 47 and establishes a hydraulic connection between the supply line 35 and the return line. The Vent throttle 49 facilitates the restarting of the fuel injection system when the tank 5 has been run empty.
  • the adjustable second throttle 28 is provided, which together with the metering unit 37 prevents the impermissible pressure build-up described above.
  • the second throttle 28 allows fuel to flow from the pressure side of the pump elements 19 into the low-pressure region of the fuel injection system.
  • the outflow of fuel through the second throttle 28 prevents the above-mentioned build-up of pressure on the pressure side of the pump elements 19 in push mode due to the leakage of the metering unit 37.
  • a first embodiment of an adjustable throttle according to the invention in the form of a 2-way flow control valve 51 is shown schematically.
  • the 2-way flow control valve 51 has a high pressure connection 53 , which is hydraulically connected, for example, to the common rail 25 or the pressure side of the high-pressure fuel pump 17 (see FIG. 1).
  • the high-pressure connection 53 opens into a housing 55 of the 2-way flow control valve 51, in which a control piston 57 is guided with a measuring throttle 59.
  • the control piston 57 divides the interior of the housing 55 into a first part 61 and a second part 63.
  • the first part 61 has the same pressure as on the pressure side of the high-pressure fuel pump 17 and in the common rail 25 (see FIG. 1), while in second part 63 there is a lower pressure.
  • the pressure reduction takes place in the control throttle 59 when the fuel under high pressure flows from the first part 61 through the control throttle 59 into the second part 63 of the interior of the housing 55.
  • a leakage discharge 67 starts from the second part 63 of the interior of the housing 55.
  • the leakage discharge 61 is with the low pressure area of the fuel injection system (see FIG. 1) . hydraulically connected.
  • the control piston 57 releases the entire cross section of the leakage discharge 67. This is due to the fact that the pressure in the first part 61 or in the high-pressure connection 53 is comparatively low.
  • the hydraulic force acting on the control piston 57 also increases and moves the control piston 57 further to the left in the position shown in FIG. 2b.
  • a control edge 69 partially closes the leakage discharge 67, which leads to an increase in the flow resistance within the 2-way flow control valve 51. This limits the amount of leakage that flows from the high-pressure connection 53 into the leakage discharge 67.
  • the metering orifice 59 By a suitable dimensioning of the metering orifice 59, the spring stiffness of the compression spring 65 and the opening cross section of the leakage discharge 67, the leaks of can 'ge, which according to the invention by the 2-way flow control valve flows 51, even if the pressure during operation of the fuel injection system can be kept almost constant Common Rail 25 is undergoing major changes.
  • FIG. 3 shows a further exemplary embodiment of a 2-way flow control valve 51 according to the invention.
  • the same components are provided with the same reference symbols and the same applies with regard to FIGS. 2a and b accordingly.
  • the control edge 69 of the control piston 57 together with the
  • Leakage discharge 67 a control throttle 71, the cross section of which depends on the position of the control piston 57 relative to the leakage discharge 67.
  • control piston 57 rests on a shoulder 73 in the housing.
  • the shoulder 73 closes the measuring throttle 59 in the control piston 57, so that in the state shown in FIG. 3 there is no leakage from the high-pressure connection 53 into the Leakage discharge 57 can reach.
  • the compression spring 65 ensures that the control piston 57 is in contact with the shoulder 71. Only when there is such a high pressure in the first part 61 of the interior of the housing 55 that the pressure on the part of the housing not covered by the shoulder 73
  • End face 75 of the control piston 57 acting hydraulic force is greater than the contact pressure of the compression spring 65, the control piston 57 moves away from the shoulder 71. In the position of the 2-way flow control valve shown in FIG. 3, the control piston 57 then moves downward.
  • FIG. 4 shows a third exemplary embodiment of a 2-way flow control valve according to the invention.
  • the control piston 57 does not have a control edge, but a control cone 75 which interacts with a sealing seat 77 in the housing 55.
  • the control throttle 71 is formed by the control cone 75 and the sealing seat 77.
  • FIG. 5 shows the operating behavior of the 2-way flow control valves according to FIGS. 3 and 4 shown in diagram form.
  • the pressure P Rall in the common rail 25 or in the high-pressure connection 53 is plotted on the abscissa, while the flow rate Q per unit of time [1 / h] is plotted on the ordinate.
  • Below a minimum pressure P ⁇ . n the control piston 57 is still in contact with the
  • Stop 73 so that the amount of leakage Q is equal to 0 in this area.
  • the control piston 57 lifts off the shoulder 73 and fuel flows from the high-pressure connection 53 into the leakage discharge 67.
  • the leakage quantity Q drops rapidly with increasing pressure, which is due to the characteristic of the control throttle 71 is.
  • the 2-way flow control valve 51 Flow through the 2-way flow control valve 51 is prevented.
  • the 2-way flow control valve will be designed in such a way that the minimum pressure P min is slightly less than the minimum pressure of the injectors (not shown) of the fuel injection system and that the maximum pressure P mav is selected so that when the internal combustion engine is in overrun, it is also below In the most unfavorable circumstances, the leakage quantities that occur are safely discharged and, during normal operation of the internal combustion engine, the 2-way flow control valve according to the invention closes again, if possible, at low pressures P ⁇ .., since the efficiency of the fuel injection system increases when the leakage discharge 67 is closed.

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

Abstract

L'invention concerne un dispositif d'injection de carburant, notamment un dispositif d'injection à rampe commune, dans lequel d'éventuelles fuites d'une unité de dosage (37) s'écoulent dans un deuxième étranglement (28) du côté refoulement de la pompe de carburant haute pression (17).
PCT/DE2003/000878 2002-09-13 2003-03-18 Dispositif d'injection de carburant pour moteur à combustion interne WO2004027250A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2002142591 DE10242591A1 (de) 2002-09-13 2002-09-13 Kraftstoffeinspritzanlage für Brennkraftmaschinen
DE10242591.4 2002-09-13

Publications (1)

Publication Number Publication Date
WO2004027250A1 true WO2004027250A1 (fr) 2004-04-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2003/000878 WO2004027250A1 (fr) 2002-09-13 2003-03-18 Dispositif d'injection de carburant pour moteur à combustion interne

Country Status (2)

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DE (1) DE10242591A1 (fr)
WO (1) WO2004027250A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007107411A2 (fr) * 2006-03-22 2007-09-27 Robert Bosch Gmbh Pompe d'injection haute pression et système d'injection pour un moteur à combustion interne
WO2008122521A1 (fr) * 2007-04-05 2008-10-16 Continental Automotive Gmbh Soupape et système d'injection pour un moteur à combustion interne comprenant une soupape
WO2014121869A1 (fr) * 2013-02-06 2014-08-14 Robert Bosch Gmbh Pompe haute pression à soupape de pression différentielle intégrée
ITMI20132214A1 (it) * 2013-12-27 2015-06-28 Bosch Gmbh Robert Valvola di sovrappressione per una pompa common rail di alta pressione e pompa common rail di alta pressione
IT201700059021A1 (it) * 2017-05-30 2018-11-30 Bosch Gmbh Robert Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna
CN109996952A (zh) * 2016-11-30 2019-07-09 曼恩能源方案有限公司 燃料供应系统和燃料分配器块

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004028998A1 (de) * 2004-06-16 2006-01-05 Robert Bosch Gmbh Hochdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine
FR2889260A3 (fr) * 2005-07-26 2007-02-02 Renault Sas Rampe commune d'alimentation en carburant pour moteur, comprenant deux chambres

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19612413A1 (de) * 1996-03-28 1997-10-02 Rexroth Mannesmann Gmbh Druckfluid-Versorgungssystem, insbesondere für ein Kraftstoff-Einspritzsystem
DE19618932A1 (de) * 1996-05-10 1997-11-20 Siemens Ag Vorrichtung und Verfahren zur Regelung des Kraftstoffes in einem Hochdruckspeicher
DE10016242A1 (de) * 2000-03-31 2001-10-04 Siemens Ag Druckregelventil mit integrierter Sicherheitsfunktion
DE10057786A1 (de) * 2000-11-22 2002-06-06 Siemens Ag Einspritzsystem für eine Brennkraftmaschine und Verfahren zum Regeln und/oder Entlüften eines solchen Einspritzsystems

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19612413A1 (de) * 1996-03-28 1997-10-02 Rexroth Mannesmann Gmbh Druckfluid-Versorgungssystem, insbesondere für ein Kraftstoff-Einspritzsystem
DE19618932A1 (de) * 1996-05-10 1997-11-20 Siemens Ag Vorrichtung und Verfahren zur Regelung des Kraftstoffes in einem Hochdruckspeicher
DE10016242A1 (de) * 2000-03-31 2001-10-04 Siemens Ag Druckregelventil mit integrierter Sicherheitsfunktion
DE10057786A1 (de) * 2000-11-22 2002-06-06 Siemens Ag Einspritzsystem für eine Brennkraftmaschine und Verfahren zum Regeln und/oder Entlüften eines solchen Einspritzsystems

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007107411A2 (fr) * 2006-03-22 2007-09-27 Robert Bosch Gmbh Pompe d'injection haute pression et système d'injection pour un moteur à combustion interne
WO2007107411A3 (fr) * 2006-03-22 2007-11-08 Bosch Gmbh Robert Pompe d'injection haute pression et système d'injection pour un moteur à combustion interne
WO2008122521A1 (fr) * 2007-04-05 2008-10-16 Continental Automotive Gmbh Soupape et système d'injection pour un moteur à combustion interne comprenant une soupape
WO2014121869A1 (fr) * 2013-02-06 2014-08-14 Robert Bosch Gmbh Pompe haute pression à soupape de pression différentielle intégrée
ITMI20132214A1 (it) * 2013-12-27 2015-06-28 Bosch Gmbh Robert Valvola di sovrappressione per una pompa common rail di alta pressione e pompa common rail di alta pressione
CN109996952A (zh) * 2016-11-30 2019-07-09 曼恩能源方案有限公司 燃料供应系统和燃料分配器块
CN109996952B (zh) * 2016-11-30 2021-05-25 曼恩能源方案有限公司 燃料供应系统和燃料分配器块
IT201700059021A1 (it) * 2017-05-30 2018-11-30 Bosch Gmbh Robert Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna

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