EP2884092B1 - Procédé et dispositif de réglage du débit d'une soupape d'injection - Google Patents

Procédé et dispositif de réglage du débit d'une soupape d'injection Download PDF

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Publication number
EP2884092B1
EP2884092B1 EP13197361.2A EP13197361A EP2884092B1 EP 2884092 B1 EP2884092 B1 EP 2884092B1 EP 13197361 A EP13197361 A EP 13197361A EP 2884092 B1 EP2884092 B1 EP 2884092B1
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EP
European Patent Office
Prior art keywords
fluid reservoir
adjusting
injection valve
volume
compensating
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EP13197361.2A
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German (de)
English (en)
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EP2884092A1 (fr
Inventor
Claus BIEDERER
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Sonplas GmbH
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Sonplas GmbH
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    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8092—Fuel injection apparatus manufacture, repair or assembly adjusting or calibration

Definitions

  • the invention relates to a device for adjusting a flow rate of an injection valve according to the preamble of claim 1 and to a method for adjusting a flow rate of an injection valve according to the preamble of claim 11.
  • the device comprises a receptacle for receiving and holding the injector to be adjusted, an adjusting device for adjusting a setting mechanism of the injection valve for adjusting the flow, a fluid reservoir for a test fluid, a pump for generating or changing a pressure of the test fluid in the fluid reservoir and a measuring device for Determining the pressure in the fluid reservoir.
  • the injection valve to be adjusted is attached to a receptacle, a test fluid is pressurized in a fluid reservoir by means of a pump, a defined number of injection processes are executed, a pressure change in the fluid reservoir is determined and the flow rate of the injection valve is determined converted a change in volume and adjusted by means of an adjusting device adjustment mechanism of the injector for adjusting the flow of the injector.
  • Injectors are of great importance for modern internal combustion engines. Only by a precise metering of the fuel in the cylinder compliance with the emissions regulations and optimum fuel consumption can be achieved.
  • the tolerance of the injection quantity characteristic q f (ti / tp) is of primary importance. in this connection q denotes the injection quantity and f (ti / tp) a function f as a function of the injection duration ti and the period tp.
  • the requirements of the injection quantity characteristic of the injectors are always higher, and it is looking for new, innovative methods that allow to increase the quality of the setting to expand the application of the injectors beyond the previous areas .
  • the use of the so-called ballistic operating range in which very small injection quantities can be generated by means of very short control signals, is becoming increasingly important.
  • this operating range it is necessary to set the injection valves in the lowest range of the quantity characteristic.
  • the injection quantity characteristic of an injection valve in particular a gasoline injection valve, can be adjusted by means of a spring system in the valve. This adjustment process is a crucial manufacturing process and tight tolerances in the production of injectors.
  • An adjusting device usually has a hydraulic measuring circuit with storage tank, feed pump, admission pressure control, filtration, high-pressure pump, pressure regulator, pressure sensor and flow sensor and a Mixierkopf over which the injection valve is supplied with a test fluid.
  • a correction value is calculated for the spring system, on the basis of which the spring system of the injection valve is adjusted or adjusted by means of the adjusting mechanism. As a rule, this process is repeated until the desired nominal flow rate is reached, wherein as a rule several iterations are carried out until the desired flow rate can be achieved within the required tolerances.
  • the volume displaced by the adjusting pin during the adjustment represents a considerable disturbance which impairs the accuracy of the measurement and requires additional waiting times in the adjustment.
  • a device and a method for adjusting and checking the flow in valves is in the DE 44 33 543 C1 described.
  • the valve is arranged in a measuring device and acted upon by a fluid at a predefined volume flow.
  • the self-adjusting pressure of the fluid in the measuring device is determined.
  • An adjusting device on the valve is adjusted according to the determined pressure value until the actual pressure corresponds to a desired pressure.
  • the publication DE 10 2004 060531 A1 relates to a method for adjusting hydraulic valves with respect to the hydraulic dynamic flow by adjusting the spring force of the valve spring without measuring the hydraulic dynamic flow.
  • the publication DE 101 03 899 A1 relates to a device for calibrating injection quantity indicators as well as an injection quantity indicator which for calibration comprises a volume generator with a chamber which can receive and deliver a test volume reproducibly.
  • the publication US Pat. No. 4,798,084 relates to a device for measuring an injected amount of fuel which is connected to a device for computer-controlled input of fuel quantities.
  • the publication WO 02/46606 A1 relates to an apparatus and a method for determining the injection quantity of injection nozzles, in particular of motorized vehicles, the apparatus having an injection nozzle and a measuring cell.
  • the publication EP 2 453 123 A1 relates to a multi-stage method for determining the injection behavior of a fuel injector, wherein the corresponding engine is driven externally during the test.
  • the publication DE 10 2010 002898 A1 relates to a device for evaluating a Injection device, which is designed for the injection of a fluid medium, wherein the measurement is carried out in a measuring chamber with the aid of a pressure measuring device, which is suitable to measure the pressure in the measuring chamber as a function of time.
  • the invention has for its object to provide an apparatus and a method for adjusting the flow of an injector, which allow a particularly precise and fast adjustment.
  • the device comprises a compensating body with which the volume of the fluid reservoir can be changed.
  • the compensating body is coupled to the adjusting device such that during a movement of the adjusting device, which causes a change in volume of the fluid reservoir, the compensating body is movable so that the volume change is at least partially, preferably completely, compensated.
  • a balancing body is coupled to the actuator so that upon movement of the actuator, by which a volume change of the fluid reservoir is generated, the balancing body is moved so that the volume change at least partially , preferably completely, is compensated.
  • the invention is based on the finding that the movement of the adjusting element arranged in the fluid reservoir effects a change, albeit slight, in the volume of the fluid reservoir. This changes the pressure in the fluid reservoir, which can also be referred to as a hydraulic measuring circuit. Since usually several adjustments of the adjusting device are required to adjust the injection valve within the predetermined tolerances to a desired flow rate, so far had the pressure in the fluid reservoir determined again after each adjustment of the actuator or a corresponding inaccuracy be accepted.
  • a basic idea of the invention can thus be seen in compensating for the change in volume of the fluid reservoir caused by the adjustment of the adjusting device, in particular at the same time, by an equally large volume change elsewhere.
  • a compensating body coupled to the adjusting device is provided according to the invention, by the movement of which an opposite volume change can be generated in accordance with the movement of the adjusting device.
  • the volume in the fluid reservoir thus remains constant, so that a new test injection can take place immediately after.
  • the adjustment process can thereby be significantly accelerated.
  • the test fluid may be any fluid, in particular any fluid.
  • a liquid is used which in parameters such as density, viscosity and / or compressibility at least largely coincides with the fluid used in the operation of the injection valve.
  • the same fluid can be used, for example a fuel such as gasoline or diesel.
  • the compensating piston is mechanically connected to the adjusting device.
  • the mechanical connection ensures a reliable adjustment of the balance piston according to the movement of the actuator.
  • a mechanical coupling is also robust and reliable.
  • the coupling causes a movement of the compensation body takes place with each movement of the adjusting device.
  • all active connections in which a component of the adjusting device, with which the adjusting pin is moved, also causes a movement of the compensating body can be understood to mean the coupling.
  • This component can be, for example, a lifting body or a drive, which is mechanically connected or coupled both to the adjusting pin and to the compensating body.
  • the component may also be an electronic control unit which actuates both a drive of the adjusting pin and a drive of the compensating body.
  • the coupling of the invention differs from conventional adjustment methods.
  • the volume change resulting from the movement of the adjusting pin is measured, for example by a pressure change.
  • a compensatory movement is performed, such as a volume reduction by a piston pump.
  • the adjusting device can also be referred to as an actuating element. It can in principle be designed as desired, as long as it has at least one movable component with which the adjusting mechanism of an injection valve can be adjusted. For this purpose, it may include a setting pin. This is preferably hollow for passing the test fluid.
  • the compensating body can basically have any shape and be positioned at any desired location, as long as it adjoins the fluid reservoir or partially protrudes into it.
  • the balance body comprises a movable balance piston. This is moved coupled to the adjustment pin.
  • the balancing piston is coupled to the actuator, that upon movement of the adjusting pin of the balance piston is moved by an equal distance.
  • the coupling is such that the compensation piston is moved by a greater distance than the adjustment pin.
  • a cross-sectional area of the balance piston is smaller than that of the adjustment pin.
  • the compensating body can also be designed as part of the adjusting device, that is to say be mechanically connected thereto or be formed in one piece with a component of the adjusting device.
  • the compensating body may also be formed identically to the adjusting pin.
  • a fluid volume around the adjusting body can be shaped in the same way as a fluid volume around the adjusting pin to the injection valve, with the difference that no test fluid can be hosed off via the compensating body.
  • the balance body is moved opposite to the adjustment pin. Because of the matching dimensions, a volume change is compensated for particularly reliably here.
  • the compensation body can also be realized by the pump.
  • the coupling is realized via an electronic control unit, which additionally controls the pump when the adjusting element adjusts the adjusting mechanism of the injection valve.
  • the pump is just controlled so that it changes the fluid reservoir by a volume which is the same amount to the volume change by the adjusting device, but has an opposite sign.
  • the compensating body and the adjusting pin are formed by a common body.
  • a portion of the adjusting pin leads to an increase in volume of the fluid reservoir, while another portion of the adjusting pin leads to a reduction in volume.
  • a relatively simple production is made possible when the compensation body is movable within a compensation chamber of the fluid reservoir, wherein the compensation chamber via a conduit with other portions of the fluid reservoir connected is.
  • the conduit may fluidly communicate the balance body with the pump and / or with the inner cavity of the adjustment pin.
  • the compensating body is coupled to the adjusting device such that during a movement of the adjusting device, the compensating body is moved simultaneously.
  • the movement of the compensating body can also take place before or after the movement of the setting device.
  • the adjusting element is set up to act on a spring device in the injection valve for changing the flow rate of the injection valve.
  • the spring device By means of the spring device, the injection valve can be adjusted to a desired nominal flow rate.
  • the actuating element can be driven by means of a spindle drive.
  • This can in turn be driven by a motor, in particular a stepper or servomotor.
  • a spindle drive allows a particularly precise adjustment of the actuating element in small steps.
  • the compensation of the volume change by the balance piston can be realized in an advantageous manner that an end face of the balance piston is in communication with the fluid reservoir and that the end face of the balance piston is the same size as an end face of the control element. In this way, an axial adjustment of actuator and balance piston leads by the same amount to an exact compensation of the change in volume.
  • volume compensation piston and actuator can be coupled such that a movement of the actuating element causes a rectified or opposite movement of the balance piston.
  • a computing unit is provided for calculating the flow rate of the injection valve based on a determined pressure change.
  • the pressure in the fluid reservoir is determined before and after a discharge or injection process. Due to the measured pressure change, it is possible to calculate the change in the amount of test fluid in the fluid reservoir and thus the amount injected or injected.
  • calibration measurements are preferably carried out before the actual setting process, in which the storage behavior of the hydraulic circuit or fluid reservoir is determined.
  • the fluid reservoir is pressurized.
  • the pressure increase is recorded and stored as a function of the change in volume up to a desired maximum pressure by a measuring device.
  • the pressure drop history is recorded. Based on the measurements characteristic curves can be determined, which indicate a relation between volume and pressure with rising and falling pressure.
  • Fig. 1 schematically shows an embodiment of a device 100 according to the invention for adjusting a flow of an injection valve.
  • the injection valve 1 is held in a receptacle 10 of the device 100, which is formed on an adjusting head 3 of the device 100.
  • the injection quantity characteristic of the injection valve 1 can be adjusted by means of a spring device 19 in the injection valve 1. This adjustment is done before the regular operation of the injector 1 with the device 100th
  • This first has as an essential component an adjusting element 4 with an adjusting pin 41.
  • an adjusting mechanism 30 of the injection valve 1 can be adjusted, whereby the flow through the injection valve 1 is changed.
  • the flow through the injection valve 1 is determined as the flow rate per injection process. To determine this flow rate, a test fluid is pumped through the injection valve 1 with the device 100.
  • the device 100 comprises a fluid reservoir 15 with which a test fluid can be conducted to the injection nozzle 1.
  • a fluid reservoir 15 As a fluid reservoir 15, the entire area can be understood, which is fluidly connected to an inlet of the injection valve 1, in particular without line breaks or shut-offs.
  • a pump 8 is connected to the fluid reservoir 15 in order to generate a pressure in the fluid reservoir 15 and thus to convey the test fluid through the injection nozzle 1.
  • the pump 8 is preferably a high-pressure pump 8, in particular a leakage-free working piston pump.
  • This includes a displacement member which is adjustable with a spindle drive. This can in turn be driven by a stepper motor or servomotor. This allows the pump 8 to generate a hydraulic volume flow. Since the speed of the motor is adjustable over a wide range, advantageously, the volume flow provided by the pump can also be adjusted over a wide range. If the final stroke of the pump is reached, it must be refilled with test fluid.
  • the pump 8 can also be used as a metering pump to nachzu busyn a certain volume.
  • an inlet valve 6 is present. While the flow rate through the injection valve 1 is measured and adjusted with the device 100, the inlet valve 6 remains shut off. For refilling test fluid between measuring processes of the device 100 alone, the inlet valve 6 is opened. Therefore, the inlet valve 6 can be regarded as a boundary of the fluid reservoir 15.
  • the flow rate of test fluid through the injection valve 1 is calculated via the pressure in the fluid reservoir 15. This calculation and the actual measuring operation will be described in more detail later.
  • a measuring device 11, that is, a pressure sensor 11, is provided to measure the pressure in the fluid reservoir 15. This can be arranged at any point of the fluid reservoir 15, that is, it is fluidly and continuously connected to the rest of the fluid reservoir 15.
  • the pressure sensor 11 is arranged on a line, with which test fluid can be conducted away from device 100. This line and thus the fluid reservoir 15 are limited by a flushing valve 16, which is closed in the measuring operation of the device 100.
  • the volume of the fluid reservoir 15 plays an important role. In conventional devices 100, however, this volume is not constant during the adjustment process. Thus, movement of the adjustment pin 41 results in a change in the volume of the fluid reservoir 15. This volume change is conventionally calculated or estimated and used to calculate the flow rate. This is associated with inaccuracies, which are reduced or bypassed in the inventive device 100. In addition, a time saving is achieved, as will be explained in more detail later.
  • the compensation body 5 comprises a compensation piston 55 which is movable in a cylinder 56.
  • This interior is part of the fluid reservoir 15 and therefore fluidly connected to the inlet opening of the injection valve 1.
  • the cylinder 56 may include an inlet 51 and an outlet 52 at its interior. In this case, the interior is shaped so that the inlet 51 and outlet 52 are connected to each other regardless of the position of the balance piston 55 via the interior.
  • the pump 8 is fluidly connected to the inlet 51 and the outlet 52 is fluidly connected to an adjusting head 3 of the device 100, wherein from the adjusting head 3, the test fluid into the injection valve 1 can be introduced.
  • the fluid reservoir 15 is not fluidly connected via the outlet 52, but via the inlet 51 with the adjusting head 3 is.
  • the interior of the cylinder 56 is a final volume or dead end whose volume is adjustable.
  • the compensating body 5, in the illustrated example of the compensating piston 55 is displaced by a movement of the actuating element 4.
  • the compensating piston 55 is coupled via a coupling element 60 to a lifting body 42 of the adjusting element 4.
  • the lifting body 42 By a movement of the lifting body 42 is on the one hand, the adjusting pin 41 slidably.
  • the coupling element 60 and thus the compensating piston 55 is movable.
  • the coupling between the coupling element and the lifting body 42 can be designed in principle arbitrary. For a particularly robust design, the coupling can be done mechanically. Alternatively, a magnetic coupling is possible. As a result, the coupling element 60 can be released more easily from the lifting body 42, thus facilitating component replacement if required.
  • the compensating body 5 can be of any desired shape as long as a movement is carried out via the coupling to the adjusting element 4 by which a volume change of the fluid reservoir 15 is just the same but opposite to a volume change of the fluid reservoir 15 by a movement of the adjusting pin 41.
  • This condition is met particularly easily and reliably in the illustrated embodiment.
  • the cross-sectional dimensions of the balance piston 55 and the adjustment pin 41 are the same. As a result, the volume changes that are generated by moving the adjusting pin 41 and the compensating piston 55 are also the same.
  • the cross-sectional dimensions of the cavity of the cylinder 56 may be greater than the outer dimensions of the balance piston 55.
  • the lateral surface of the balance piston 55 is surrounded by test fluid, whereby frictional losses are reduced by moving the balance piston 55.
  • FIG. 1 An enlarged view of the in Fig. 1
  • the area indicated by reference numeral 70 is in Fig. 2 shown. Visible is in particular the adjusting pin 41, which contacts the adjusting mechanism 30 of the injection valve 1 and can adjust it. moreover the adjusting pin 41 is hollow, so that test fluid can be introduced through this into the injection valve 1.
  • a flow rate of test fluid through the injector 1 is determined. This actual value is compared with a desired value. Depending on the result of the comparison, the setting mechanism 30 of the injection valve 1 is adjusted via the setting pin 41. Thus, the flow rate through the injection valve 1 is changed by an injection process. Then, an actual value of the flow rate is again determined and compared with the desired value. This process can be repeated until the deviation from the actual value to the desired value is below a predetermined tolerance threshold. The steps performed in this procedure are described in more detail below.
  • the pressure or a pressure change in the fluid reservoir 15 is detected. It should be concluded that a change in volume of test fluid in the fluid reservoir 15. From this volume change, it is possible to deduce the volume of test fluid which has been passed through the injection valve 1 over the measurement period.
  • the feed direction of the pump 8 is switched, whereby the volume of the fluid reservoir 15 is increased and the pressure in the fluid reservoir 15 is reduced. Meanwhile, the pressure drop 11 is recorded with the pressure sensor.
  • the fluid reservoir 15 and thus also the high-pressure pump 8 are filled again with test fluid.
  • the injection valve 1 is flushed with a low pressure supply to avoid trapped air.
  • the inlet and the purge valves 6, 9, 16 and the injection valve 1 are closed.
  • the high-pressure pump 8 is actuated until it has generated a desired pressure in the fluid reservoir 15.
  • the injection valve 1 is driven to spray test fluid for predetermined periods.
  • several injection processes can be carried out with the injection valve 1. Then, the pressure drop in the fluid reservoir 15 is determined with the pressure sensor 11.
  • the volume Q can also be calculated as the integral of the pressure change dP over Kc.
  • the volume determined in this way can be converted to a corrected volume, which corresponds to the volume that would have been sprayed through the injection nozzle 1, if the pressure had remained constant at the previously set pressure.
  • the corrected volume may be divided by the number of injections during the described measuring operation.
  • an actual value of the injection quantity is calculated.
  • This is compared with a desired value of the injection quantity.
  • an adjustment path for the adjustment mechanism 30 is calculated. This adjustment is set by means of the adjusting pin 41.
  • the volume of the fluid reservoir 15 is reduced by means of the pump 8. As a result, the desired pressure in the fluid reservoir 15 is set again.
  • the volume reduction required for this purpose is calculated from the previously ascertained rising graph of the characteristic curve.
  • the described procedure of measuring and adjusting is repeated until the measured actual value of the injection quantity is within a predetermined tolerance range around the desired value.
  • the pump 8 is preferably dimensioned so that it can generate a volume change of the fluid reservoir 15, which is sufficient for the number of successive injection operations of the injection valve 1, which are performed between two adjustment operations with the adjusting pin 41.
  • the coupled movement of the compensation body 5 reduces volume and pressure changes in the fluid reservoir 15. Thereby, the time required for setting the desired pressure with the pump after a setting operation of the adjusting pin 41 can be reduced.
  • a device 100 can set a larger number of injectors 1 within a predetermined time.
  • a total number of devices 1 can be reduced, thus achieving a cost saving.

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

Claims (11)

  1. Dispositif de réglage d'un débit d'une soupape d'injection (1), avec :
    - un réceptacle (10) pour recevoir et maintenir la soupape d'injection (1) devant être réglée,
    - un dispositif de réglage (4) pour le réglage d'un mécanisme de réglage (30) de la soupape d'injection (1) en vue de l'ajustement du débit,
    - un réservoir de fluide (15) pour un fluide de test,
    - une pompe (8) pour la réalisation d'une mise sous pression du fluide de test dans le réservoir de fluide (15), et
    - un dispositif de mesure (11) pour la détermination de la pression dans le réservoir de fluide (15),
    caractérisé :
    en ce qu'un corps de compensation (5) est prévu, avec lequel le volume du réservoir de fluide (15) peut être modifié,
    en ce que le corps de compensation (5) est couplé au dispositif de réglage (4) de telle manière que lors d'un mouvement du dispositif de réglage (4), par lequel une modification de volume du réservoir de fluide (15) est produite, le corps de compensation (5) peut être déplacé de telle manière que la modification de volume est compensée au moins en partie.
  2. Dispositif selon la revendication 1,
    caractérisé :
    en ce que le corps de compensation (5) est couplé de manière mécanique au dispositif de réglage (4).
  3. Dispositif selon la revendication 1 ou 2,
    caractérisé :
    en ce que le corps de compensation (5) comprend un piston de compensation (55) qui peut être déplacé.
  4. Dispositif selon une des revendications 1 à 3,
    caractérisé :
    en ce que le dispositif de réglage (4) comprend une tige de réglage (41), qui peut être déplacée pour le réglage du mécanisme de réglage.
  5. Dispositif selon la revendication 4,
    caractérisé :
    en ce que le piston de compensation (55) est couplé au dispositif de réglage (4) de telle manière que lors d'un mouvement de la tige de réglage (41), le piston de compensation (55) est déplacé de la même longueur.
  6. Dispositif selon la revendication 4 ou 5,
    caractérisé :
    en ce qu'une surface de section transversale du piston de compensation (55) et une surface de section transversale de la tige de réglage (41) sont de la même taille.
  7. Dispositif selon une des revendications 1 à 6,
    caractérisé :
    - en ce qu'au moins une surface avant du corps de compensation (5) est en situation de liaison avec le réservoir de fluide (15), et
    - en ce que la surface avant du corps de compensation (5) a les mêmes dimensions qu'une surface avant de la partie du dispositif de réglage (4) qui est en situation de liaison avec le réservoir de fluide (15) et peut être déplacée pour le réglage du mécanisme de réglage (30).
  8. Dispositif selon une des revendications 1 à 7,
    caractérisé :
    en ce que le corps de compensation (5) peut être déplacé à l'intérieur d'une chambre de compensation du réservoir de fluide (15), la chambre de compensation étant reliée par un conduit aux parties restantes du réservoir de fluide (15).
  9. Dispositif selon une des revendications 4 à 8,
    caractérisé :
    en ce que le corps de compensation (5) et la tige de réglage (41) sont formés par un corps commun.
  10. Dispositif selon une des revendications 1 à 9,
    caractérisé :
    en ce que le corps de compensation (5) est couplé au dispositif de réglage (4) de telle manière que lors d'un mouvement du dispositif de réglage (4), le corps de compensation (5) est déplacé en même temps.
  11. Procédé de réglage d'un débit d'une soupape d'injection (1) à l'aide d'un dispositif selon une des revendications 1 à 10,
    selon lequel :
    - la soupape d'injection (1) devant être réglée est fixée à un réceptacle (10),
    - au moyen d'une pompe (8), un fluide de test est mis sous pression dans un réservoir de fluide (15),
    - un nombre prédéterminé de processus d'injection sont mis en oeuvre,
    - un changement de pression dans le réservoir de fluide (15) est déterminé et converti en un changement de volume pour la détermination du débit de la soupape d'injection (1), et
    - au moyen d'un dispositif de réglage (4), on règle un mécanisme de réglage (30) de la soupape d'injection (1) en vue du réglage du débit de la soupape d'injection (1),
    caractérisé :
    en ce qu'un corps de compensation (5) est couplé au dispositif de réglage (4) de telle manière que lors d'un mouvement du dispositif de réglage (4), par lequel une modification de volume du réservoir de fluide (15) est produite, le corps de compensation (5) est déplacé de telle manière que la modification de volume est compensée au moins en partie.
EP13197361.2A 2013-12-16 2013-12-16 Procédé et dispositif de réglage du débit d'une soupape d'injection Active EP2884092B1 (fr)

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EP13197361.2A EP2884092B1 (fr) 2013-12-16 2013-12-16 Procédé et dispositif de réglage du débit d'une soupape d'injection

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EP13197361.2A EP2884092B1 (fr) 2013-12-16 2013-12-16 Procédé et dispositif de réglage du débit d'une soupape d'injection

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EP2884092A1 EP2884092A1 (fr) 2015-06-17
EP2884092B1 true EP2884092B1 (fr) 2016-04-27

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CN109882331B (zh) * 2019-02-28 2020-11-13 一汽解放汽车有限公司 一种长针阀喷油嘴偶件高压流量测量装置

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