EP3642472B1 - Dispositif et procédé de réglage de la pression de retour d'un injecteur - Google Patents

Dispositif et procédé de réglage de la pression de retour d'un injecteur Download PDF

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Publication number
EP3642472B1
EP3642472B1 EP18728098.7A EP18728098A EP3642472B1 EP 3642472 B1 EP3642472 B1 EP 3642472B1 EP 18728098 A EP18728098 A EP 18728098A EP 3642472 B1 EP3642472 B1 EP 3642472B1
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EP
European Patent Office
Prior art keywords
return
pressure
injector
valve
return line
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.)
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Application number
EP18728098.7A
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German (de)
English (en)
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EP3642472A1 (fr
Inventor
Armin Batha
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP3642472A1 publication Critical patent/EP3642472A1/fr
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Classifications

    • 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
    • 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
    • F02D41/3863—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using 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
    • 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
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • 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
    • 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
    • F02M63/0052—Pressure relief valves with means for adjusting the opening pressure, e.g. electrically controlled
    • 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
    • F02M63/0056—Throttling valves, e.g. having variable opening positions throttling the flow
    • 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
    • F02M63/023—Means for varying 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
    • 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
    • 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
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • F02M65/001—Measuring fuel delivery of a fuel 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
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • F02M65/006—Measuring or detecting fuel leakage of fuel injection apparatus

Definitions

  • the invention relates to a device for setting the return pressure for an injector and a return block for injectors.
  • the invention also relates to a measuring device for measuring the injection quantity and / or return quantity for at least one injector and a test stand for at least one injector.
  • the invention also relates to a method for setting the return pressure on at least one injector.
  • WO 2009/056558 A1 describes a fuel system for controlling a fuel supply for an internal combustion engine.
  • a pressure in a leakage line of the fuel system is detected by a sensor and transmitted to a pressure regulator, which regulates a pressure control valve.
  • a counter pressure leakage should be controllable by means of the pressure regulating valve of the fuel system.
  • the invention creates a device for setting the return pressure for an injector with the features of claim 1, a return block for injectors with the
  • a measuring device for injection quantity and / or return quantity measurement for at least one injector with the features of claim 8 a test stand for at least one injector with the features of claim 9 and a method for setting the return pressure on at least one injector with the features of Claim 10.
  • the electrically adjustable throttle valve for setting / regulating the return pressure is relatively tolerance-free, as a result of which inaccuracies in setting / regulating the return pressure are avoided / reduced to a minimum.
  • the return pressure can be set / regulated more precisely / more reliably by means of the electrically adjustable throttle valve.
  • the quality of the measurements of the injection quantity and / or the return quantity can also be increased (or increased) by means of the improved accuracy of the set / regulated return pressure . Measurement errors when measuring the injection quantity and / or the return quantity are reduced).
  • the electrically adjustable throttle valve can be used to set the return pressure at least between the first end of the return line and the electrically adjustable throttle valve in the return line to each return pressure value of a set of values with at least two different return pressure values.
  • the return pressure can be varied by means of the electrically adjustable throttle valve over a comparatively large set of values from different return pressure values, while at the same time ensuring the advantageous accuracy when setting / adjusting the return pressure to a target return pressure of the respective injector type of the injector connected to the first end .
  • the device described here for setting the return pressure is therefore suitable for a large number of applications of different injector types or injector generations, even if they require different return pressures.
  • the adjustable / adjustable return pressure can be varied over a set of values between 0 bar and 10 bar. The one described here
  • Embodiment of the device for setting the return pressure therefore eliminates the conventional disadvantage that up to now a device specifically specified for this purpose, which has the specially designed mechanical pressure control valves, had to be used for each injector type and for each injector generation.
  • An operator of the device described here for setting the return pressure therefore does not need different devices for different injector types or injector generations. Additional equipment can also be saved by means of the device described here for setting the return pressure. The operator thus saves money, storage space in the workshop and does not lose any set-up time (for equipping the device he is using with the appropriate additional equipment).
  • the electrically adjustable throttle valve can be a common rail pressure control valve or a diesel common rail pressure control valve.
  • the electrically adjustable throttle valve can also be a high pressure injection valve or a gasoline high pressure injection valve.
  • the valve types described here are inexpensive actuators.
  • the valve types described here can work together reliably as an electrically adjustable throttle valve in conjunction with an inexpensive standard pressure sensor (from the automotive sector).
  • the device can have a controller which is designed to output at least one control signal with a modulated pulse width for clocked control of the common rail pressure control valve or diesel common rail pressure control valve or high pressure injection valve or gasoline high pressure injection valve.
  • a controller which is designed to output at least one control signal with a modulated pulse width for clocked control of the common rail pressure control valve or diesel common rail pressure control valve or high pressure injection valve or gasoline high pressure injection valve.
  • the device preferably also comprises a pressure sensor and / or a temperature sensor connected to the return line between the first end of the return line and the electrically adjustable throttle valve. Equipping the device for setting the return pressure with the pressure sensor enables the return pressure to be regulated by means of the electrically adjustable throttle valve by "throttling", so that the Return pressure increases at least between the first end of the return line and the electrically adjustable throttle valve in the return line until a desired target return pressure / target pressure is / is reached. A back pressure that arises between the first end of the return line and the electrically adjustable throttle valve can be detected via the pressure sensor and used for a corresponding regulation of the electrically adjustable throttle valve. An additional use of the temperature sensor also allows thermodynamic influences to be taken into account.
  • the advantages described above are also implemented in a return block for injectors with at least two such devices for setting the return pressure.
  • the return block can also have at least one controller which is designed to send at least one control signal with a modulated pulse width for clocked control of the at least one associated common rail pressure control valve or diesel common rail pressure control valve or high pressure injection valve or gasoline high pressure injection valve to spend.
  • a measuring device for injection quantity and / or return quantity measurement for at least one injector with at least one such device for return pressure adjustment, or a corresponding return block, and at least one injection quantity and / or return quantity sensor, by means of which an injection quantity and / or the flow rate through the associated return line flowing return volume can be measured brings about the advantages described above.
  • Fig. 1 shows a schematic representation of an embodiment of the device for setting the return pressure.
  • the device 10 shown schematically for setting the return pressure can (also) be used for examining / checking an injector 12.
  • the injector 12 can be understood to be a common rail injector or an injection valve.
  • the device 10 for setting the return pressure can be used with a large number of different types of injectors 12 (or different generations of injectors 12).
  • the device 10 for setting the return pressure has a return line 14.
  • the return outlet opening 12a can also be connected to the first end 14a of the return line 14 via at least one connection component / be connected. (An injection opening 12b of the injector 12, through which an injection quantity 18 of the injector 12 emerges from the injector 12, is not connected to the return line 14.)
  • the device 10 for setting the return pressure also includes an electrically adjustable throttle valve 20, by means of which a return pressure can be set at least between the first end 14a of the return line 14 with the connected injector 12 and the electrically adjustable throttle valve 20 in the return line 14.
  • the return pressure is thus a defined pressure between the injector 12 and the electrically adjustable throttle valve 20.
  • the use of the electrically adjustable throttle valve 20 allows a high level of accuracy when setting / regulating the return pressure. In particular, the return pressure can be reliably set / regulated equal to a desired / predetermined setpoint return pressure.
  • the return pressure (at least between the first end 14a of the return line and the electrically adjustable throttle valve 20) in the return line 14 can optionally be set to each return pressure value of a set of values with at least two different return pressure values. Therefore, the device 10 for setting the return pressure can also be used for different types of injectors and different generations of injectors, even if their desired / predetermined target return pressures differ from one another. Using the device 10 for setting the return pressure therefore enables the advantages already explained above for reducing costs, saving set-up times and reducing space requirements.
  • the device 10 for setting the return pressure preferably also comprises one between the first end 14a of the return line 14 and the electrical one adjustable throttle valve 20 connected to the return line 14. In this case, regulation of the return pressure by means of an interaction of the electrically adjustable throttle valve 20 and the pressure sensor 22 is also possible.
  • the device 10 for setting the return pressure can also have a (in Fig. 1 not shown) include temperature sensor.
  • the electrically adjustable throttle valve 20 can be, for example, a common rail pressure control valve (or a diesel common rail pressure control valve).
  • a (diesel) common rail pressure control valve (as a hydraulic proportional valve) is designed for comparatively high pressures (depending on the type between 1800 bar and 2500 bar)
  • by means of a clocked control of the (diesel) common rail pressure control valve with a Modulation of pulse widths can also bring about a set of values of customary setpoint return pressures (at least between the first end 14a of the return line and the electrically adjustable throttle valve 20) in the return line 14. This means that even return pressures in the low pressure range (between 0 bar and 10 bar) can be achieved and reliably maintained.
  • a controller 24 of the device 10 for setting the return pressure is therefore preferably designed to output at least one control signal 26 with a modulated pulse width for clocked control of the (diesel) common rail pressure control valve.
  • the electrically adjustable throttle valve 20 is a high-pressure injection valve (or a high-pressure gasoline injection valve).
  • the (gasoline) high-pressure injection valve can be controlled / controlled by the control 24 by means of at least one control signal 26 (e.g. a simple square-wave signal) with a modulated pulse width. It is not necessary to control the (gasoline) high-pressure injection valve by means of complex control signals, which requires a complex output stage to generate the complex control signals.
  • the exemplary embodiments listed above for the electrically adjustable throttle valve 20 enable pressure setting / pressure regulation without complex control effort and without high additional costs. This also causes a significant reduction in the outlay on product maintenance during operation of the device 10 for setting the return pressure.
  • an injection quantity and / or return quantity sensor 28 by means of which the injection quantity 18 and / or the return quantity 16 flowing through the return line 14 can be measured, can be connected of the device 10 for the return pressure adjustment.
  • the device 10 for setting the return pressure is therefore versatile.
  • the device 10 for setting the return pressure can, for example, be part of a test stand.
  • Fig. 2 shows a schematic representation of an embodiment of the return block.
  • the in Fig. 2 The return block shown schematically can be used for examining / checking multiple injectors 12.
  • the return block has several devices 10 for setting the return pressure.
  • Each of the devices 10 for setting the return pressure comprises the components of the embodiment described above.
  • each of the devices 10 for setting the return pressure has one filter 30 and one temperature sensor 32 each.
  • Each of the devices 10 for setting the return pressure is designed to set / regulate the return pressure to each return pressure value of a set of values with at least two different return pressure values, the devices 10 for setting the return pressure simultaneously different return pressures in their respective return line 14 (at least between the first end 14a of the respective return line and the respective electrically adjustable throttle valve 20) can set / regulate at the same time.
  • the return block of the Fig. 2 can therefore be used for different types of injectors and different generations of injectors at the same time.
  • the return block preferably also has at least one controller 24, which is designed to send at least one control signal 26 with a modulated pulse width for clocked control of the at least one assigned Output common rail pressure control valve or diesel common rail pressure control valve or high pressure injection valve or gasoline high pressure injection valve.
  • the return block can also be used as a measuring device for measuring the injection quantity and / or the return quantity (or as a test stand).
  • the above-described embodiments of the device 10 for setting the return pressure and of the return block enable universal active pressure setting / pressure regulation by using common motor vehicle components instead of conventional industrial components. This also contributes to reducing costs when realizing the embodiments.
  • the embodiments described above enable a high degree of accuracy in the setting / regulation of return pressures (without any appreciable scatter). They thus contribute to increasing the measurement accuracy when measuring the injection quantity 18 and / or the return quantity 16 and to increasing the informative value of the measurement results obtained.
  • FIG. 3 shows a flow chart to explain an embodiment of the method for setting the return pressure on at least one injector.
  • a return pressure is at least between a first end of a return line, to which a return outlet opening of the injector is connected so that a return amount of the injector flows from the first end of the return line to a second end of the return line, and the valve in the return line set.
  • the return pressure is at least reduced by means of an electrically adjustable throttle valve set between the first end of the return line and the electrically adjustable throttle valve in the return line. The return pressure is thus set as a defined pressure in a line between the injector and the electrically adjustable throttle valve.
  • the return pressure is preferably set to a first return pressure value at least between the first end of the return line and the electrically adjustable throttle valve in the return line, while for a different / second type of injector, the return pressure is at least between the first end of the return line and the electrically adjustable throttle valve in the return line is set to a different / second return pressure value unequal to the first return pressure value. This can also happen if a target return pressure of the respective type / generation is set simultaneously on several types / generations of injectors.
  • a method step S2 can also be carried out simultaneously or at a time overlapping with method step S1, in which an injection quantity and / or a return quantity of the at least one injector are measured.
  • the method described here can thus also be referred to as a method for measuring the injection quantity and / or the return quantity on at least one injector.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Claims (10)

  1. Dispositif (10) de réglage d'une pression de retour destiné à un injecteur (12), ledit dispositif comprenant :
    une conduite de retour (14) pourvue d'une première extrémité (14a), à laquelle une ouverture de sortie de retour (12a) de l'injecteur (12) peut être raccordée directement ou indirectement de sorte qu'une quantité de retour (16) de l'injecteur (12) s'écoule de la première extrémité (14a) de la conduite de retour (14) à une deuxième extrémité (14b) de la conduite de retour (14) ; et
    au moins une soupape (20) au moyen de laquelle une pression de retour peut être réglée au moins entre la première extrémité (14a) de la conduite de retour (14), à laquelle l'injecteur (12) est raccordé, et la soupape (20) située dans la conduite de retour (14) ;
    le dispositif (10) comportant comme soupape (20) une soupape à étranglement réglable électriquement (20), la pression de retour au moins entre la première extrémité (14a) de la conduite de retour (14), à laquelle l'injecteur (12) est raccordé, et la soupape à étranglement réglable électriquement (20) située dans la conduite de retour (14) pouvant éventuellement être réglée au moyen de la soupape à étrangement réglable électriquement (20) à chaque valeur de pression de retour d'un ensemble de valeurs comportant au moins deux valeurs de pression de retour différentes,
    caractérisé en ce que
    le dispositif (10) de réglage de la pression de retour peut être utilisé pour différents types d'injecteurs et différentes générations d'injecteurs, dont les pressions de retour cibles spécifiées diffèrent les unes des autres, du fait que la pression de retour, au moins entre la première extrémité (14a) de la conduite de retour (14) et la soupape à étranglement réglable électriquement (20), peut être réglée ou régulée à une pression de retour cible de l'injecteur (12).
  2. Dispositif (10) de réglage d'une pression de retour selon la revendication 1, la soupape à étranglement réglable électriquement (20) étant une soupape de régulation de pression à rampe commune ou une soupape de régulation de pression à rampe commune diesel.
  3. Dispositif (10) de réglage d'une pression de retour selon la revendication 1, la soupape à étranglement réglable électriquement (20) étant une soupape d'injection à haute pression ou une soupape d'injection d'essence à haute pression.
  4. Dispositif (10) de réglage d'une pression de retour selon la revendication 2 ou 3, le dispositif (10) comportant une commande (24) qui est conçue pour délivrer au moins un signal de commande (26) à largeur d'impulsion modulée destiné à commander de manière cadencée la soupape de régulation de pression à rampe commune ou la soupape de régulation de pression à rampe commune diesel ou la soupape d'injection à haute pression ou la soupape d'injection d'essence à haute pression.
  5. Dispositif (10) de réglage d'une pression de retour selon l'une des revendications précédentes, le dispositif (10) comportant un capteur de pression (22) et/ou un capteur de température (32) raccordé à la conduite de retour (14) entre la première extrémité (14a) de la conduite de retour (14) et la soupape à étranglement réglable électriquement (20).
  6. Bloc de retour destiné à des injecteurs (12) et comprenant au moins deux dispositifs (10) de réglage d'une pression de retour selon l'une des revendications 1 à 3 et 4.
  7. Bloc de retour selon la revendication 2 et/ou 3 et la revendication 6, le bloc de retour comportant au moins une commande (24) qui est conçue pour délivrer au moins un signal de commande (26) de largeur d'impulsion modulée destiné à commander de manière cadencée l'au moins une soupape de commande de pression à rampe associée ou soupape de commande de pression à rampe commune diesel ou soupape d'injection à haute pression ou soupape d'injection d'essence à haute pression qui est associée.
  8. Dispositif de mesure destiné à mesurer la quantité d'injection et/ou la quantité de retour pour au moins un injecteur (12), ledit dispositif comprenant :
    au moins un dispositif (10) de réglage d'une pression de retour selon l'une des revendications 1 à 5 ou un bloc de retour selon la revendication 6 ou 7 ; et
    au moins un capteur de quantité d'injection et/ou de quantité de retour (28) au moyen duquel une quantité d'injection (18) et/ou la quantité de retour (16) s'écoulant à travers la conduite de retour (14) associée peuvent être mesurées.
  9. Banc d'essai destiné à au moins un injecteur (12) et comprenant un dispositif de mesure destiné à mesurer la quantité d'injection et/ou la quantité de retour selon la revendication 8.
  10. Procédé de réglage d'une pression de retour au niveau d'au moins un injecteur (12), le procédé comprenant l'étape suivante :
    régler une pression de retour au moyen d'au moins une soupape (20) située au moins entre une première extrémité (14a) d'une conduite de retour (14), à laquelle est raccordée une ouverture de sortie de retour (12a) de l'injecteur (12) de telle sorte qu'une quantité de retour (16) de l'injecteur (12)) s'écoule de la première extrémité (14a) de la conduite de retour (14) à une deuxième extrémité (14b) de la conduite de retour (14), et la soupape (20) située dans la conduite de retour (14) ;
    la pression de retour étant réglée au moyen d'une soupape à étranglement réglable électriquement (20) comme soupape (20) au moins entre la première extrémité (14a) de la conduite de retour (14), à laquelle l'injecteur (12) est raccordé, et la soupape à étranglement réglable électriquement (20) située dans la conduite de retour (14) (S1),
    caractérisé en ce que
    la pression de retour, au moins entre la première extrémité (14a) de la conduite de retour (14) et la soupape à étranglement réglable électriquement (20) située dans la conduite de retour (14) est réglée à une première valeur de pression de retour pour un premier type d'injecteur (12) et la pression de retour, au moins entre la première extrémité (14a) de la conduite de retour (14) et la soupape à étranglement réglable électriquement (20) située dans la conduite de retour (14), est réglée à une deuxième valeur de pression de retour, différente de la première valeur de pression de retour, pour un deuxième type d'injecteur (12) différent du premier type.
EP18728098.7A 2017-06-19 2018-05-28 Dispositif et procédé de réglage de la pression de retour d'un injecteur Active EP3642472B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017210147.4A DE102017210147A1 (de) 2017-06-19 2017-06-19 Vorrichtung und Verfahren zur Rücklaufdruckeinstellung für einen Injektor
PCT/EP2018/063886 WO2018233980A1 (fr) 2017-06-19 2018-05-28 Dispositif et procédé de réglage de la pression de retour d'un injecteur

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EP3642472A1 EP3642472A1 (fr) 2020-04-29
EP3642472B1 true EP3642472B1 (fr) 2021-07-07

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EP (1) EP3642472B1 (fr)
CN (1) CN110945232B (fr)
BR (1) BR112019026976B1 (fr)
DE (1) DE102017210147A1 (fr)
RU (1) RU2770084C2 (fr)
WO (1) WO2018233980A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH689281A5 (de) * 1994-02-03 1999-01-29 Christian Dipl-Ing Eth Mathis Kraftstoffeinspritzanlage fuer eine Brennkraftmaschine, insbesondere fuer einen Dieselmotor, sowie ein Verfahren zur Ueberwachung derselben.
RU2116497C1 (ru) * 1996-05-21 1998-07-27 Башкирский государственный аграрный университет Устройство для измерения цикловой подачи топлива
IT1293433B1 (it) * 1997-07-11 1999-03-01 Elasis Sistema Ricerca Fiat Valvola di dosaggio registrabile per un iniettore di combustibile per motori a combustione interna, e relativo metodo di registrazione.
DE102007052092B4 (de) * 2007-10-31 2011-06-01 Continental Automotive Gmbh Verfahren und Kraftstoffsystem zum Steuern der Kraftstoffzufuhr für eine Brennkraftmaschine
DE102008042154A1 (de) * 2008-09-17 2010-03-18 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102011086681A1 (de) * 2011-11-21 2013-05-23 Robert Bosch Gmbh Kraftstofffoerdersystem fuer ein Fahrzeug
DE102014217443A1 (de) * 2014-09-01 2016-03-03 Robert Bosch Gmbh Prüfablauf für Hochdruckpumpen
DE102015209377B4 (de) * 2015-05-21 2017-05-11 Mtu Friedrichshafen Gmbh Einspritzsystem für eine Brennkraftmaschine sowie Brennkraftmaschine mit einem solchen Einspritzsystem

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WO2018233980A1 (fr) 2018-12-27
EP3642472A1 (fr) 2020-04-29
CN110945232A (zh) 2020-03-31
RU2020100580A3 (fr) 2021-10-18
RU2770084C2 (ru) 2022-04-14
CN110945232B (zh) 2022-03-04
DE102017210147A1 (de) 2018-12-20
RU2020100580A (ru) 2021-07-20
BR112019026976A2 (pt) 2020-06-30
BR112019026976B1 (pt) 2023-04-11

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