EP1741903A1 - Control rod actuation device for controlling the flow of an injection pump - Google Patents

Control rod actuation device for controlling the flow of an injection pump Download PDF

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Publication number
EP1741903A1
EP1741903A1 EP06291026A EP06291026A EP1741903A1 EP 1741903 A1 EP1741903 A1 EP 1741903A1 EP 06291026 A EP06291026 A EP 06291026A EP 06291026 A EP06291026 A EP 06291026A EP 1741903 A1 EP1741903 A1 EP 1741903A1
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EP
European Patent Office
Prior art keywords
lever
axis
rod
rotation
pump
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Granted
Application number
EP06291026A
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German (de)
French (fr)
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EP1741903B1 (en
Inventor
Yvon c/o Sagem Défense Sécurité Joncour
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Safran Electronics and Defense SAS
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Sagem Defense Securite SA
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Publication of EP1741903A1 publication Critical patent/EP1741903A1/en
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Publication of EP1741903B1 publication Critical patent/EP1741903B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
    • F02D1/08—Transmission of control impulse to pump control, e.g. with power drive or power assistance
    • F02D1/10—Transmission of control impulse to pump control, e.g. with power drive or power assistance mechanical

Definitions

  • the invention relates to the regulation of the flow rate of injection pumps, in particular for internal combustion engines.
  • the power control of internal combustion engines is carried out by regulating the fuel flow in an injection pump, according to the demand required by the driver or the pilot, whether of a land vehicle or an aircraft.
  • the volumetric flow rate of the pump is controlled by means of a sliding rod mounted relative to a pump housing (called the pump body) in which the pistons are disposed between two extreme positions. , one at the minimum fuel demand (idle) and one at the maximum demand (full throttle).
  • the position of the rod is controlled by an actuating device provided with a lever coupled to one end of the rod protruding from the pump body, this lever being pivotally mounted about an axis of rotation between two corresponding extreme positions. at the extreme positions of the control rod.
  • the invention aims to solve in particular the aforementioned drawbacks.
  • the first and / or second shim can be in the form of a peelable shim.
  • Two abutment surfaces may be provided to limit the travel of the lever beyond these two extreme positions.
  • the device comprises for example a geared motor unit coupled to the axis of rotation of the lever, to drive it in rotation about its axis and thus control the position of the rod.
  • the geared motor unit is preferably coupled to the axis of rotation of the lever by means of a torque limiter, so as to allow the slipping of the lever by overcoming the engine torque in the event that the motor unit reducer would be blocked.
  • a lever for manually controlling the position of the lever, fixed to the axis of rotation thereof, can be designed to prevent any failure of the geared motor unit.
  • the invention proposes a system comprising an injection pump and an actuating device as described above.
  • FIG. 1 shows a fuel pump system 1, comprising a fuel injection pump 2 that is partially visible and of which a pump body 3 is visible, which has an outer surface 4 at least locally flat (in the plane of the figure).
  • the pump 2 comprises a plurality of pistons, disposed in the pump body 3 (and therefore not visible) and a rod 5 for regulating the flow rate of the pump 2, acting on the pistons in a known manner (it will be possible to refer in particular to to the patent European EP 0 037 389 cited in introduction).
  • This rod 5 is slidably mounted relative to the pump body 3 along an axis T of displacement perpendicular to the outer face 4; it has an end portion 6 which protrudes from the pump body 3 on the side of the outer face 4, through an orifice 7 (in dotted lines in FIG. 1), this end portion 6 being provided with a projecting pin 8 provided with a spherical head 9.
  • the rod 5 is constantly urged towards its idle position by a counter-spring 14 operating in compression and resting on a centering cup 11 fixed to a free end 12 of the rod.
  • the actuating device 13 comprises a casing 15 formed by assembling a primary casing 16 and a secondary casing 17.
  • the primary casing 16 made of aluminum alloy, is attached to the pump body 3. The seal between them is provided by means of an O-ring 18 elastomer.
  • the primary casing 16 contains a bath of oil resulting from the overflow through the orifice 7 of the rod 5 of the oil of engine lubrication via the pump 2.
  • the emptying of the primary casing 16 can be performed through an orifice 19 normally closed by a drain plug 20.
  • the secondary casing 17, also made of aluminum alloy, is fixed to the primary casing 16. It carries the axis R of rotation of the lever 14, to which the latter is rigidly fixed, and encloses a motor group. gearbox 21 coupled to the axis R of rotation for controlling the pivoting of the lever 14.
  • the geared motor group 21 comprises a stepping motor 22, the drive of which is controlled by an electronic control card (not shown) via a connector 23 fixed to the secondary casing 17, this motor 22 being provided with an output shaft 24 carrying a pinion 25 meshing with a gear 26 which in turn meshes with a toothed wheel 27 coupled to the axis R of rotation of the lever 14 by means of a torque limiter 28.
  • An angular sensor 29 continuously measures the angular position of the axis R of rotation, which coincides with the angular position of the lever 14.
  • This sensor 29 is for example constituted by an instrumented bearing mounted on a pinion 30 meshing with the gear wheel 27.
  • An external lever 31 is fixed on a portion 32 of the axis R of rotation of the lever 14, protruding from the secondary casing 17, this lever 31 being connected to a manual emergency control accessible from the cockpit (or driving), by means of a transmission cable (not shown) operating in tension and compression, so as to allow manual actuation of the pump 2 in the event of failure of the control electronics acting on the geared motor unit 21 .
  • the lever actuator 14 is in the form of a bar (metal) which, by a front portion 33, bears on the head 9, against the return spring 10, at a point of support A and a rear portion 34, which extends cantilever with respect to the axis R of rotation, is constrained to angularly move between two abutment surfaces 35, 36 formed in a wall 37 of the primary casing 16 and corresponding respectively at the two extreme positions of the lever 14, which they thus fix the angular stroke, denoted ⁇ .
  • ⁇ angular stroke
  • the point A of contact moves on the X axis between a first extreme position, called idle position, referenced A1 in FIG. 4, corresponding to the idle position of the rod 5, in which it is at a distance X 1 the outer face 4 of the pump body 3, and a second extreme position, called full-gas, referenced A2 in Figure 4, corresponding to the full throttle position of the rod 5, in which it is at a distance X 2 of the outer face 4 of the pump body 3.
  • the extreme positions of the contact point A, and consequently those of the rod 5, are determined by the position, with respect to the pump body 3 (that is to say with respect to the X and Y axes) of the axis R of rotation of the lever 14, the latter running in a plane parallel to the plane defined by the X and Y axes (see Figure 2).
  • the positions extremes of the rod 5 are determined in advance according to the desired performance of the engine that equips the pump 2. Moreover, we have seen that the angular stroke ⁇ of the lever is also predetermined.
  • the distance X R determines the idle position X 1 of the point A of contact between the lever 14 and the rod 5, while the distance Y R determines the lever arm (that is to say the length of the front portion 33 of the lever 14, separating the rotation axis R from the contact point A), which in turn determines the travel of the rod 5.
  • the correct positioning of the axis R of rotation results from the relative positioning, on the one hand, of the primary casing 16 with respect to the pump body 3 and, on the other hand, of the secondary casing 17 with respect to the primary casing 16.
  • the adjustment of the position of the axis R of rotation of the lever 14 parallel to the axis X is effected by means of a first shim 38 interposed between the face external 4 of the pump body 3 and a first bearing face 39 formed on the primary casing 16, facing the outer face 4 of the pump body 3 and parallel to it.
  • the adjustment of the position of the axis R of rotation of the lever 14 parallel to the axis Y is effected by means of a second shim 40 interposed between a second bearing face 41 formed on the primary casing 16, perpendicular to the first bearing face 39 (that is to say to the outer face 4 of the pump body 3) and parallel to the axis R rotation of the lever 14, and a bearing face 42 formed on the secondary casing 17, opposite the second bearing face 41 of the primary casing 16 and parallel thereto.
  • the thickness of the first wedge 38 is chosen so that the length of the side chain separating the outer face 4 of the pump body 3 from the rotation axis R of the lever 14 is equal to the distance X R
  • the thickness of the second shim 40 is chosen so that the length of the dimension chain separating the axis T from the rod 5 from the rotation axis R of the lever 14 is equal to the distance Y R.
  • Each shim 38, 40 can be in the form of a stack of thin sheets, the thickness of the shim can be adjusted on demand (it can be for example peelable shims, available commercially, that the it undergoes machining to adapt to the shape of the parts it is intended to strut, in this case the pump body 3 and the primary housing 16 for the first shim 38, the primary housing 16 and the secondary housing 17 for the second shim 40).
  • the actuating device 13 on the pump body 3 by mounting the primary housing 16 on the pump body 3 with the interposition of the first shim 38, then fixing the primary casing 16 to the pump body 3, for example by means of screws, then mounting the secondary casing 17 on the primary casing 16 with the interposition of the second shim 40, and finally, by fixing the secondary casing 17 to the primary casing 16 for example by means of screws.
  • any repair on the pump 2 (or on the actuating device 13) requiring the disassembly of the casings 16, 17 (including for to ensure the replacement of the actuating device 13) can be performed without the exact positioning of the axis R of rotation of the lever 14 relative to the stroke of the rod 5 is affected during reassembly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Catching Or Destruction (AREA)
  • Flow Control (AREA)
  • Magnetically Actuated Valves (AREA)
  • Fuel-Injection Apparatus (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)

Abstract

The device has an actuation lever (14) coupled to a rod (5) for controlling the position of the rod. The lever is mounted pivotally, around a rotation axle (R), between an end position, in which the lever places the rod in an idle position and another end position, in which the lever places the rod in a full throttle position. Leveling pads adjust the position of the rotation axle (R) of the lever along a direction parallel to a displacement axle of the rod and the direction perpendicular to the displacement axle and axle (R), respectively. Independent claims are also included for the following: (1) an injection pump system comprising an actuation device (2) a method for mounting an actuation device.

Description

L'invention a trait à la régulation du débit des pompes à injection, notamment pour les moteurs à combustion interne.The invention relates to the regulation of the flow rate of injection pumps, in particular for internal combustion engines.

La commande en puissance des moteurs à combustion interne, et plus particulièrement des moteurs diesel, est effectuée par régulation du débit de carburant dans une pompe à injection, en fonction de la demande requise par le conducteur ou le pilote, qu'il s'agisse d'un véhicule terrestre ou d'un aéronef.The power control of internal combustion engines, and more particularly of diesel engines, is carried out by regulating the fuel flow in an injection pump, according to the demand required by the driver or the pilot, whether of a land vehicle or an aircraft.

Dans les pompes à pistons, la régulation du débit volumétrique de la pompe est effectuée au moyen d'une tige montée coulissante, par rapport à un bâti de la pompe (appelé corps de pompe) dans lequel sont disposés les pistons, entre deux positions extrêmes, correspondant l'une à la demande minimale de carburant (ralenti) et l'autre à la demande maximale (plein gaz).In piston pumps, the volumetric flow rate of the pump is controlled by means of a sliding rod mounted relative to a pump housing (called the pump body) in which the pistons are disposed between two extreme positions. , one at the minimum fuel demand (idle) and one at the maximum demand (full throttle).

Ces deux positions sont prises en compte dans la cartographie du moteur, laquelle est programmée dans l'électronique derégulation de la puissance.These two positions are taken into account in the engine mapping, which is programmed in the power control electronics.

La position de la tige est commandée par un dispositif d'actionnement muni d'un levier couplé à une extrémité de la tige dépassant du corps de pompe, ce levier étant monté pivotant, autour d'un axe de rotation, entre deux positions extrêmes correspondant aux positions extrêmes de la tige de régulation.The position of the rod is controlled by an actuating device provided with a lever coupled to one end of the rod protruding from the pump body, this lever being pivotally mounted about an axis of rotation between two corresponding extreme positions. at the extreme positions of the control rod.

Un montage de ce type est décrit dans le brevet européen EP 0 037 389 .An assembly of this type is described in the patent European EP 0 037 389 .

Les caractéristiques dimensionnelles varient d'une pompe à l'autre, ce qui se traduit notamment par des fluctuations des positions extrêmes de la tige de régulation. Il est donc nécessaire d'adapter dimensionnellement le levier du dispositif d'actionnement et de régler sa course afin que ses positions extrêmes correspondent effectivement, en fonctionnement, à celles de la tige.The dimensional characteristics vary from one pump to another, which results in particular in fluctuations of the extreme positions of the control rod. It is therefore necessary to dimensionally adjust the lever of the actuating device and adjust its stroke so that its extreme positions actually correspond, in operation, to those of the rod.

A l'heure actuelle ces contraintes n'ont pas permis de standardiser les dispositifs d'actionnement. I1 est à noter que dans le domaine de l'aviation notamment, le problème de standardisation ne s'est même pas posé, les mécaniciens n'ayant pas l'habitude des grandes séries, même si chaque intervention sur le dispositif d'actionnement, y compris son remplacement, nécessite des opérations de réglage que l'obligation de respecter la cartographie du moteur rend fastidieuses.At present, these constraints have not made it possible to standardize the actuating devices. It should be noted that in the field of aviation in particular, the problem of standardization has not even arisen, mechanics not used to large series, even if each intervention on the actuating device, including its replacement, requires adjustment operations that the obligation to respect the engine mapping makes tedious.

L'invention vise à résoudre notamment les inconvénients précités.The invention aims to solve in particular the aforementioned drawbacks.

A cet effet, et suivant un premier aspect, l'invention propose un dispositif d'actionnement d'une tige de régulation du débit d'une pompe à injection, cette tige étant mobile en translation, par rapport à un corps de pompe et suivant un axe de déplacement, entre une première position extrême, dite de ralenti, dans laquelle elle commande un débit minimum de la pompe, et une seconde position extrême, dite de plein gaz dans laquelle elle commande un débit maximum de la pompe, ce dispositif comportant :

  • un levier couplé à la tige pour réguler la position de celle-ci, ce levier étant monté pivotant, autour d'un axe de rotation, entre une première position extrême, dite de ralenti, dans laquelle le levier place la tige dans sa position de ralenti, et une seconde position extrême, dite de plein gaz, dans laquelle le levier place la tige dans sa position de plein gaz,
  • un premier moyen d'ajustement de la position de l'axe de rotation du levier suivant une première direction parallèle à l'axe de déplacement de la tige, et
  • un second moyen d'ajustement de la position de l'axe de rotation du levier suivant une seconde direction perpendiculaire à l'axe de déplacement de la tige et à l'axe de rotation du levier.
For this purpose, and according to a first aspect, the invention proposes a device for actuating a control rod of the flow rate of an injection pump, this rod being movable in translation, with respect to a pump body and following an axis of displacement, between a first end position, called idle position, in which it controls a minimum flow rate of the pump, and a second end position, said full gas in which it controls a maximum flow rate of the pump, this device comprising :
  • a lever coupled to the rod to regulate the position thereof, the lever being pivotally mounted about an axis of rotation between a first end position, called idle, in which the lever places the rod in its position of idle, and a second extreme position, called full throttle, in which the lever places the rod in its full throttle position,
  • first means for adjusting the position of the axis of rotation of the lever in a first direction parallel to the axis of movement of the rod, and
  • second means for adjusting the position of the axis rotation of the lever in a second direction perpendicular to the axis of movement of the rod and the axis of rotation of the lever.

Suivant un mode de réalisation, le dispositif d'actionnement comprend :

  • un carter primaire dans lequel est reçu le levier, le premier moyen d'ajustement comprenant une première cale interposée entre une face externe sur la pompe, perpendiculaire à la direction de déplacement de la tige, et une première face d'appui en regard sur le carter primaire, et
  • un carter secondaire portant l'axe de rotation du levier, le second moyen d'ajustement comprenant une seconde cale interposée entre une seconde face d'appui sur le carter primaire, sensiblement perpendiculaire à la première surface d'appui et parallèle à l'axe de rotation du levier, et une face d'appui en regard sur le carter secondaire.
According to one embodiment, the actuation device comprises:
  • a primary housing in which the lever is received, the first adjustment means comprising a first wedge interposed between an outer face on the pump, perpendicular to the direction of movement of the rod, and a first bearing face facing the primary casing, and
  • a secondary casing bearing the axis of rotation of the lever, the second adjustment means comprising a second shim interposed between a second bearing surface on the primary casing, substantially perpendicular to the first bearing surface and parallel to the axis; rotation of the lever, and a bearing surface facing the secondary casing.

La première et/ou la seconde cale peut se présenter sous la forme d'une cale pelable.The first and / or second shim can be in the form of a peelable shim.

Deux surfaces de butées peuvent être prévues pour limiter la course du levier au delà de ces deux positions extrêmes.Two abutment surfaces may be provided to limit the travel of the lever beyond these two extreme positions.

Par ailleurs, le dispositif comprend par exemple un groupe moto-réducteur couplé à l'axe de rotation du levier, pour entraîner celui-ci en rotation autour de son axe et ainsi commander la position de la tige.Furthermore, the device comprises for example a geared motor unit coupled to the axis of rotation of the lever, to drive it in rotation about its axis and thus control the position of the rod.

Le groupe moto-réducteur est de préférence couplé à l'axe de rotation du levier par l'intermédiaire d'un limiteur de couple, de sorte à permettre le patinage du levier par surpassement du couple moteur dans l'éventualité où le groupe moto-réducteur se trouverait bloqué.The geared motor unit is preferably coupled to the axis of rotation of the lever by means of a torque limiter, so as to allow the slipping of the lever by overcoming the engine torque in the event that the motor unit reducer would be blocked.

Un levier de commande manuelle de la position du levier, fixé à l'axe de rotation de celui-ci, peut être prévu pour parer à toute défaillance du groupe moto-reducteur.A lever for manually controlling the position of the lever, fixed to the axis of rotation thereof, can be designed to prevent any failure of the geared motor unit.

L'invention propose, suivant un deuxième aspect, un système comprenant une pompe à injection et un dispositif d'actionnement tel que décrit ci-dessus.According to a second aspect, the invention proposes a system comprising an injection pump and an actuating device as described above.

Et, suivant un troisième aspect, l'invention propose un procédé de montage d'un dispositif d'actionnement d'une tige de régulation du débit d'une pompe à injection, cette tige étant mobile en translation, par rapport à un corps de pompe et suivant un axe de déplacement perpendiculaire à une face externe du corps de pompe, entre une première position extrême, dite de ralenti, dans laquelle elle commande un débit minimum de la pompe, et une seconde position extrême, dite de plein gaz dans laquelle elle commande un débit maximum de la pompe, le dispositif comportant un levier d'actionnement de la tige, ce levier étant reçu dans un carter primaire, en étant monté pivotant autour d'un axe de rotation porté par un carter secondaire, entre une première position extrême, dite de ralenti, et une seconde position extrême, dite de plein gaz, le levier définissant entre ses positions extrêmes une course angulaire, ce procédé comprenant les étapes de :

  • fixation du carter primaire au corps de pompe, avec interposition, entre la face externe de celui-ci et une première face d'appui en regard sur le carter primaire, d'une première cale, et
  • fixation du carter secondaire au carter primaire, avec interposition, entre une seconde face d'appui sur le carter primaire, perpendiculaire à la première face d'appui et parallèle à l'axe de rotation du levier, et une face d'appui en regard sur le carter secondaire, d'une seconde cale,
dans lequel l'épaisseur des cales dépend des positions extrêmes de la tige de réglage et de la course angulaire du levier.And, according to a third aspect, the invention proposes a method of mounting a device for actuating a rod for regulating the flow rate of an injection pump, this rod being movable in translation, with respect to a body of pump and along an axis of displacement perpendicular to an outer face of the pump body, between a first end position, called idle position, in which it controls a minimum flow rate of the pump, and a second extreme position, called full gas position in which it controls a maximum flow rate of the pump, the device comprising a lever for actuating the rod, this lever being received in a primary casing, being pivotally mounted about an axis of rotation carried by a secondary casing, between a first extreme position, called idle, and a second extreme position, called full throttle, the lever defining between its extreme positions an angular stroke, this method comprising the steps of:
  • fixing the primary casing to the pump body, with interposition, between the outer face thereof and a first bearing surface facing the primary casing, a first shim, and
  • attachment of the secondary casing to the primary casing, with interposition, between a second bearing surface on the primary casing, perpendicular to the first bearing face and parallel to the axis of rotation of the lever, and a bearing face facing on the secondary casing, a second shim,
in which the thickness of the shims depends on the extreme positions of the adjusting rod and the angular stroke of the lever.

D'autres objets et avantages de l'invention apparaîtront à la lumière de la description faite ci-après en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue schématique en coupe montrant un système de pompe d'injection comprenant une pompe à injection et un dispositif d'actionnement d'une tige de régulation du débit de la pompe ;
  • la figure 2 est une vue schématique en coupe du dispositif d'actionnement représenté sur la figure 1, suivant le plan de coupe II-II ;
  • la figure 3 est une vue schématique en coupe du dispositif d'actionnement de la figure 2, suivant le plan de coupe III-III ; et
  • la figure 4 est un diagramme illustrant le mode de calcul de cote de montage du dispositif d'actionnement.
Other objects and advantages of the invention will become apparent in the light of the description given hereinafter with reference to the appended drawings in which:
  • Figure 1 is a schematic sectional view showing an injection pump system comprising an injection pump and a device for actuating a pump flow control rod;
  • Figure 2 is a schematic sectional view of the actuating device shown in Figure 1, along the section plane II-II;
  • Figure 3 is a schematic sectional view of the actuating device of Figure 2, along the section plane III-III; and
  • FIG. 4 is a diagram illustrating the mode of calculation of the mounting dimension of the actuating device.

Sur la figure 1 est représenté un système 1 de pompe à injection, comprenant une pompe 2 à injection de carburant proprement dite, partiellement visible et dont on aperçoit un corps de pompe 3, qui présente une face externe 4 au moins localement plane (dans le plan de la figure).FIG. 1 shows a fuel pump system 1, comprising a fuel injection pump 2 that is partially visible and of which a pump body 3 is visible, which has an outer surface 4 at least locally flat (in the plane of the figure).

La pompe 2 comprend une pluralité de pistons, disposés dans le corps de pompe 3 (et donc non visibles) ainsi qu'une tige 5 de régulation du débit de la pompe 2, agissant sur les pistons de façon connue (on pourra notamment se reporter au brevet européen EP 0 037 389 cité en introduction).The pump 2 comprises a plurality of pistons, disposed in the pump body 3 (and therefore not visible) and a rod 5 for regulating the flow rate of the pump 2, acting on the pistons in a known manner (it will be possible to refer in particular to to the patent European EP 0 037 389 cited in introduction).

Cette tige 5 est montée coulissante par rapport au corps de pompe 3 suivant un axe T de déplacement perpendiculaire à la face externe 4 ; elle présente une portion d'extrémité 6 qui dépasse du corps de pompe 3 du côté de la face externe 4, au travers d'un orifice 7 (en traits pointillés sur la figure 1), cette portion d'extrémité 6 étant munie d'un pion 8 en saillie muni d'une tête 9 sphérique.This rod 5 is slidably mounted relative to the pump body 3 along an axis T of displacement perpendicular to the outer face 4; it has an end portion 6 which protrudes from the pump body 3 on the side of the outer face 4, through an orifice 7 (in dotted lines in FIG. 1), this end portion 6 being provided with a projecting pin 8 provided with a spherical head 9.

La tige 5 est déplaçable entre :

  • une première position extrême, dite de ralenti, représentée en traits pointillés sur les figures 2 et 3, dans laquelle elle commande un débit minimum de la pompe 2 pour appauvrir le mélange air/carburant à destination du moteur, et
  • une seconde position extrême, dite de plein gaz, représentée en traits continus sur les figures 2 et 3, dans laquelle elle commande un débit maximum de la pompe 2 pour enrichir le mélange air/carburant.
The rod 5 is movable between:
  • a first extreme position, called idle, shown in dashed lines in Figures 2 and 3, wherein it controls a minimum flow rate of the pump 2 to deplete the air / fuel mixture to the engine, and
  • a second extreme position, called full gas, shown in solid lines in Figures 2 and 3, wherein it controls a maximum flow of the pump 2 to enrich the air / fuel mixture.

La tige 5 est sollicitée en permanence vers sa position de ralenti par un ressort 10 de rappel antagoniste fonctionnant en compression et s'appuyant sur une coupelle 11 de centrage fixée à une extrémité libre 12 de la tige.The rod 5 is constantly urged towards its idle position by a counter-spring 14 operating in compression and resting on a centering cup 11 fixed to a free end 12 of the rod.

Le système 1 comprend en outre un dispositif 13 d'actionnement de la tige 5, qui comprend un levier 14 d'actionnement couplé à la tige 5 pour réguler la position de celle-ci, ce levier 14 étant monté pivotant, autour d'un axe R de rotation, entre :

  • une première position extrême, dite de ralenti, représentée en traits pointillés sur la figure 2, dans laquelle le levier 14 place la tige 5 dans sa position de ralenti, et
  • une seconde position extrême, dite de plein gaz, représentée en traits continus sur la tige 5 dans sa position de plein gaz.
The system 1 further comprises a device 13 for actuating the rod 5, which comprises an actuating lever 14 coupled to the rod 5 to regulate the position thereof, this lever 14 being pivotally mounted around a R axis of rotation, between:
  • a first extreme position, called idle position, shown in dotted lines in FIG. 2, in which the lever 14 places the rod 5 in its idle position, and
  • a second extreme position, called full gas, shown in continuous lines on the rod 5 in its full gas position.

Le dispositif d'actionnement 13 comprend un carter 15 formé par assemblage d'un carter primaire 16 et d'un carter secondaire 17.The actuating device 13 comprises a casing 15 formed by assembling a primary casing 16 and a secondary casing 17.

Le carter primaire 16, réalisé en alliage d'aluminium, est fixé au corps de pompe 3. L'étanchéité entre eux est assurée au moyen d'un joint torique 18 en élastomère. Le carter primaire 16 contient un bain d'huile résultant du débordement par l'orifice 7 de la tige 5 de l'huile de graissage du moteur via la pompe 2. La vidange du carter primaire 16 peut être effectuée au travers d'un orifice 19 normalement fermé par un bouchon 20 de vidange.The primary casing 16, made of aluminum alloy, is attached to the pump body 3. The seal between them is provided by means of an O-ring 18 elastomer. The primary casing 16 contains a bath of oil resulting from the overflow through the orifice 7 of the rod 5 of the oil of engine lubrication via the pump 2. The emptying of the primary casing 16 can be performed through an orifice 19 normally closed by a drain plug 20.

Le carter secondaire 17, également réalisé en alliage d'aluminium, est quant à lui fixé sur le carter primaire 16. Il porte l'axe R de rotation du levier 14, auquel celui-ci est rigidement fixé, et renferme un groupe moto-réducteur 21 couplé à l'axe R de rotation pour la commande du pivotement du levier 14.The secondary casing 17, also made of aluminum alloy, is fixed to the primary casing 16. It carries the axis R of rotation of the lever 14, to which the latter is rigidly fixed, and encloses a motor group. gearbox 21 coupled to the axis R of rotation for controlling the pivoting of the lever 14.

Le groupe moto-réducteur 21 comprend un moteur pas à pas 22, dont l'entraînement est commandé par une carte électronique de contrôle (non représentée) par l'intermédiaire d'une connectique 23 fixée au carter secondaire 17, ce moteur 22 étant muni d'un arbre de sortie 24 portant un pignon 25 engrenant un réducteur 26 qui engrène à son tour une roue dentée 27 couplée à l'axe R de rotation du levier 14 par l'intermédiaire d'un limiteur de couple 28.The geared motor group 21 comprises a stepping motor 22, the drive of which is controlled by an electronic control card (not shown) via a connector 23 fixed to the secondary casing 17, this motor 22 being provided with an output shaft 24 carrying a pinion 25 meshing with a gear 26 which in turn meshes with a toothed wheel 27 coupled to the axis R of rotation of the lever 14 by means of a torque limiter 28.

Un capteur angulaire 29 mesure en permanence la position angulaire de l'axe R de rotation, qui est confondue avec la position angulaire du levier 14. Ce capteur 29 est par exemple constitué d'un roulement instrumenté monté sur un pignon 30 engrenant la roue dentée 27.An angular sensor 29 continuously measures the angular position of the axis R of rotation, which coincides with the angular position of the lever 14. This sensor 29 is for example constituted by an instrumented bearing mounted on a pinion 30 meshing with the gear wheel 27.

Un levier 31 externe est fixé sur une portion 32 de l'axe R de rotation du levier 14, dépassant du carter secondaire 17, ce levier 31 étant relié à une commande manuelle de secours accessible depuis le poste de pilotage (ou de conduite), par l'intermédiaire d'un câble de transmission (non représenté) fonctionnant en traction et en compression, de sorte à permettre un actionnement manuel de la pompe 2 en cas de défaillance de l'électronique de contrôle agissant sur le groupe moto-réducteur 21.An external lever 31 is fixed on a portion 32 of the axis R of rotation of the lever 14, protruding from the secondary casing 17, this lever 31 being connected to a manual emergency control accessible from the cockpit (or driving), by means of a transmission cable (not shown) operating in tension and compression, so as to allow manual actuation of the pump 2 in the event of failure of the control electronics acting on the geared motor unit 21 .

Comme cela est visible sur la figure 2, le levier d'actionnement 14 se présente sous la forme d'une barre (métallique) qui, par une portion avant 33, prend appui sur la tête 9, à l'encontre du ressort de rappel 10, en un point d'appui A et dont une portion arrière 34, qui s'étend en porte-à-faux par rapport à l'axe R de rotation, est astreinte à se déplacer angulairement entre deux surfaces de butée 35, 36 formées dans une paroi 37 du carter primaire 16 et correspondant respectivement aux deux positions extrêmes du levier 14 dont elles fixent ainsi la course angulaire, notée α.As can be seen in Figure 2, the lever actuator 14 is in the form of a bar (metal) which, by a front portion 33, bears on the head 9, against the return spring 10, at a point of support A and a rear portion 34, which extends cantilever with respect to the axis R of rotation, is constrained to angularly move between two abutment surfaces 35, 36 formed in a wall 37 of the primary casing 16 and corresponding respectively at the two extreme positions of the lever 14, which they thus fix the angular stroke, denoted α.

On définit un système d'axes orthogonaux X et Y comme suit :

  • l'axe X est confondu avec l'axe T de déplacement de la tige 5, et
  • l'axe Y est contenu dans le plan de la face externe 4 du corps de pompe 3 ; il coupe l'axe X ; il est perpendiculaire à celui-ci ainsi qu'à l'axe R de rotation du levier 14 (Cf. figure 2).
We define a system of orthogonal axes X and Y as follows:
  • the axis X coincides with the axis T of displacement of the rod 5, and
  • the Y axis is contained in the plane of the outer face 4 of the pump body 3; he cuts the X axis; it is perpendicular to it and to the axis R of rotation of the lever 14 (see Figure 2).

Le point A de contact se déplace sur l'axe X entre une première position extrême, dite de ralenti, référencée A1 sur la figure 4, correspondant à la position de ralenti de la tige 5, dans laquelle il se trouve à une distance X1 de la face externe 4 du corps de pompe 3, et une seconde position extrême, dite de plein gaz, référencée A2 sur la figure 4, correspondant à la position de plein gaz de la tige 5, dans laquelle il se trouve à une distance X2 de la face externe 4 du corps de pompe 3.The point A of contact moves on the X axis between a first extreme position, called idle position, referenced A1 in FIG. 4, corresponding to the idle position of the rod 5, in which it is at a distance X 1 the outer face 4 of the pump body 3, and a second extreme position, called full-gas, referenced A2 in Figure 4, corresponding to the full throttle position of the rod 5, in which it is at a distance X 2 of the outer face 4 of the pump body 3.

Les positions extrêmes du point A de contact, et par voie de conséquence celles de la tige 5, sont déterminées par la position, par rapport au corps de pompe 3 (c'est-à-dire par rapport aux axes X et Y) de l'axe R de rotation du levier 14, celui-ci effectuant sa course dans un plan parallèle au plan défini par les axes X et Y (Cf. figure 2) .The extreme positions of the contact point A, and consequently those of the rod 5, are determined by the position, with respect to the pump body 3 (that is to say with respect to the X and Y axes) of the axis R of rotation of the lever 14, the latter running in a plane parallel to the plane defined by the X and Y axes (see Figure 2).

Comme nous l'avons vu ci-dessus, les positions extrêmes de la tige 5 sont déterminées à l'avance en fonction des performances souhaitées du moteur qu'équipe la pompe 2. Par ailleurs, nous avons vu que la course angulaire α du levier est également prédéterminée.As we have seen above, the positions extremes of the rod 5 are determined in advance according to the desired performance of the engine that equips the pump 2. Moreover, we have seen that the angular stroke α of the lever is also predetermined.

De ces paramètres on peut déduire la position de l'axe R de rotation du levier 14 par rapport au corps de pompe. Plus précisément, l'axe R de rotation du levier étant perpendiculaire au plan (X, Y), on peut définir complètement sa position par sa distance XR à l'axe Y, mesurée parallèlement à l'axe X, et par sa distance YR à l'axe X, mesurée parallèlement à l'axe Y.From these parameters can be deduced the position of the axis R of rotation of the lever 14 relative to the pump body. More precisely, since the rotation axis R of the lever is perpendicular to the (X, Y) plane, its position can be completely defined by its distance X R to the Y axis, measured parallel to the X axis, and by its distance Y R to the X axis, measured parallel to the Y axis.

Il résulte d'une analyse géométrique simple (Cf. figure 4) que les distances XR et YR peuvent être obtenues par les formules suivantes : X R = X 1 + X 2 2   et   Y R = X 2 − X 1 2 ⁢ tan α 2

Figure imgb0001
It follows from a simple geometric analysis (see Figure 4) that the distances X R and Y R can be obtained by the following formulas: X R = X 1 + X 2 2 and Y R = X 2 - X 1 2 ⁢ tan α 2
Figure imgb0001

En termes concrets, la distance XR détermine la position de ralenti X1 du point A de contact entre le levier 14 et la tige 5, tandis que la distance YR détermine le bras de levier (c'est-à-dire la longueur de la portion avant 33 du levier 14, séparant l'axe R de rotation du point A de contact), qui détermine à son tour la course de la tige 5.In concrete terms, the distance X R determines the idle position X 1 of the point A of contact between the lever 14 and the rod 5, while the distance Y R determines the lever arm (that is to say the length of the front portion 33 of the lever 14, separating the rotation axis R from the contact point A), which in turn determines the travel of the rod 5.

Le positionnement correct de l'axe R de rotation résulte du positionnement relatif, d'une part, du carter primaire 16 par rapport au corps de pompe 3 et, d'autre part, du carter secondaire 17 par rapport au carter primaire 16.The correct positioning of the axis R of rotation results from the relative positioning, on the one hand, of the primary casing 16 with respect to the pump body 3 and, on the other hand, of the secondary casing 17 with respect to the primary casing 16.

L'ajustement de la position de l'axe R de rotation du levier 14 parallèlement à l'axe X (c'est-à-dire pour fixer XR), est effectué au moyen d'une première cale 38 interposée entre la face externe 4 du corps de pompe 3 et une première face d'appui 39 formée sur le carter primaire 16, en regard de la face externe 4 du corps de pompe 3 et parallèle à celle-ci.The adjustment of the position of the axis R of rotation of the lever 14 parallel to the axis X (that is to say to fix X R ), is effected by means of a first shim 38 interposed between the face external 4 of the pump body 3 and a first bearing face 39 formed on the primary casing 16, facing the outer face 4 of the pump body 3 and parallel to it.

Par ailleurs, l'ajustement de la position de l'axe R de rotation du levier 14 parallèlement à l'axe Y (c'est-à-dire pour fixer YR), est effectué au moyen d'une seconde cale 40 interposée entre une seconde face d'appui 41 formée sur le carter primaire 16, perpendiculaire à la première face d'appui 39 (c'est-à-dire à la face externe 4 du corps de pompe 3) et parallèle à l'axe R de rotation du levier 14, et une face d'appui 42 formée sur le carter secondaire 17, en regard de la seconde face d'appui 41 du carter primaire 16 et parallèle à celle-ci.Furthermore, the adjustment of the position of the axis R of rotation of the lever 14 parallel to the axis Y (that is to say to fix Y R ), is effected by means of a second shim 40 interposed between a second bearing face 41 formed on the primary casing 16, perpendicular to the first bearing face 39 (that is to say to the outer face 4 of the pump body 3) and parallel to the axis R rotation of the lever 14, and a bearing face 42 formed on the secondary casing 17, opposite the second bearing face 41 of the primary casing 16 and parallel thereto.

L'épaisseur de la première cale 38 est choisie pour que la longueur de la chaîne de cote séparant la face externe 4 du corps de pompe 3 de l'axe R de rotation du levier 14 soit égale à la distance XR, tandis que l'épaisseur de la seconde cale 40 est choisie pour que la longueur de la chaîne de cote séparant l'axe T de la tige 5 de l'axe R de rotation du levier 14 soit égale à la distance YR.The thickness of the first wedge 38 is chosen so that the length of the side chain separating the outer face 4 of the pump body 3 from the rotation axis R of the lever 14 is equal to the distance X R , while the The thickness of the second shim 40 is chosen so that the length of the dimension chain separating the axis T from the rod 5 from the rotation axis R of the lever 14 is equal to the distance Y R.

L'établissement de cette chaîne de cote ne pose pas de difficulté particulière et est donc à portée de l'homme du métier. Précisons que, l'axe R de rotation du levier 14 étant monté sur le carter secondaire 17, lui-même monté sur le carter primaire 16, les deux chaînes de cote tiennent compte du positionnement de l'axe R de rotation par rapport au carter secondaire 17 ainsi que des caractéristiques dimensionnelles des carters primaire 16 et secondaire 17. On négligera les incidences des variations de température ambiante sur la dilatation des matériaux choisis pour la réalisation des carters 16, 17.The establishment of this rating chain does not pose any particular difficulty and is therefore within reach of the skilled person. Note that, the axis R of rotation of the lever 14 being mounted on the secondary housing 17, itself mounted on the primary housing 16, the two dimension chains take into account the positioning of the axis R of rotation relative to the housing secondary 17 as well as dimensional characteristics of the primary casings 16 and secondary 17. We will neglect the effects of ambient temperature variations on the expansion of the materials chosen for the production of casings 16, 17.

Chaque cale 38, 40 peut se présenter sous forme d'un empilement de tôles minces, l'épaisseur de la cale pouvant être réglée à la demande (il peut s'agir par exemple de cales pelables, disponibles dans le commerce, que l'on soumet à un usinage pour l'adapter à la forme des pièces qu'elle est destinée à entretoiser, en l'occurrence le corps de pompe 3 et le carter primaire 16 pour la première cale 38, le carter primaire 16 et le carter secondaire 17 pour la seconde cale 40).Each shim 38, 40 can be in the form of a stack of thin sheets, the thickness of the shim can be adjusted on demand (it can be for example peelable shims, available commercially, that the it undergoes machining to adapt to the shape of the parts it is intended to strut, in this case the pump body 3 and the primary housing 16 for the first shim 38, the primary housing 16 and the secondary housing 17 for the second shim 40).

Une fois l'épaisseur des cales 38, 40 définies (par le calcul des chaînes de cote, comme indiqué ci-dessus), il est possible d'effectuer le montage du dispositif d'actionnement 13 sur le corps de pompe 3 en montant le carter primaire 16 sur le corps de pompe 3 avec interposition entre eux de la première cale 38, en fixant ensuite le carter primaire 16 au corps de pompe 3 par exemple au moyen de vis, puis en montant le carter secondaire 17 sur le carter primaire 16 avec interposition entre eux de la seconde cale 40, et, enfin, en fixant le carter secondaire 17 au carter primaire 16 par exemple au moyen de vis.Once the thickness of shims 38, 40 defined (by the calculation of the dimension chains, as indicated above), it is possible to mount the actuating device 13 on the pump body 3 by mounting the primary housing 16 on the pump body 3 with the interposition of the first shim 38, then fixing the primary casing 16 to the pump body 3, for example by means of screws, then mounting the secondary casing 17 on the primary casing 16 with the interposition of the second shim 40, and finally, by fixing the secondary casing 17 to the primary casing 16 for example by means of screws.

La position de l'axe R de rotation étant ainsi déterminée par l'épaisseur des cales 38, 40, toute réparation sur la pompe 2 (ou sur le dispositif d'actionnement 13) nécessitant le démontage des carters 16, 17 (y compris pour assurer le remplacement du dispositif d'actionnement 13) peut être effectuée sans que le positionnement exact de l'axe R de rotation du levier 14 par rapport à la course de la tige 5 ne s'en trouve affecté lors du remontage.The position of the axis R of rotation being thus determined by the thickness of the shims 38, 40, any repair on the pump 2 (or on the actuating device 13) requiring the disassembly of the casings 16, 17 (including for to ensure the replacement of the actuating device 13) can be performed without the exact positioning of the axis R of rotation of the lever 14 relative to the stroke of the rod 5 is affected during reassembly.

Il est donc notamment possible de standardiser la fabrication du dispositif d'actionnement 13, son adaptation à différents types de pompe (se distinguant par des courses de tige différentes) pouvant s'effectuer par simple ajustement de l'épaisseur des cales 38, 40.It is therefore possible in particular to standardize the manufacture of the actuating device 13, its adaptation to different types of pump (distinguished by different rod strokes) that can be performed by simple adjustment of the thickness of the wedges 38, 40.

Il en résulte une simplification de la fabrication des pompes et de toute intervention de maintenance qu'elles pourraient nécessiter.This results in a simplification of the manufacture of pumps and any maintenance intervention they may require.

Claims (9)

Dispositif (13) d'actionnement d'une tige (5) de régulation du débit d'une pompe (2) à injection, cette tige (5) étant mobile en translation, par rapport à un corps de pompe (3) et suivant un axe (T) de déplacement, entre une première position extrême, dite de ralenti, dans laquelle elle commande un débit minimum de la pompe (2), et une seconde position extrême, dite de plein gaz dans laquelle elle commande un débit maximum de la pompe (2), ce dispositif (13) comportant : - un levier (14) couplé à la tige (5) pour réguler la position de celle-ci, ce levier (14) étant monté pivotant, autour d'un axe (R) de rotation, entre une première position extrême, dite de ralenti, dans laquelle le levier (14) place la tige (5) dans sa position de ralenti, et une seconde position extrême, dite de plein gaz, dans laquelle le levier (14) place la tige (5) dans sa position de plein gaz, - un premier moyen (38) d'ajustement de la position de l'axe (R) de rotation du levier (14) suivant une première direction (X) parallèle à l'axe (T) de déplacement de la tige (5), et - un second moyen (40) d'ajustement de la position de l'axe (R) de rotation du levier (14) suivant une seconde direction perpendiculaire à l'axe (T) de déplacement de la tige (5) et à l'axe de rotation du levier (14). Device (13) for actuating a rod (5) for regulating the flow rate of an injection pump (2), this rod (5) being able to move in translation relative to a pump body (3) and following an axis (T) of displacement, between a first extreme position, called idle, in which it controls a minimum flow rate of the pump (2), and a second extreme position, called full gas in which it controls a maximum flow rate of the pump (2), this device (13) comprising: - a lever (14) coupled to the rod (5) for regulating the position thereof, the lever (14) being pivotally mounted about an axis (R) of rotation, between a first extreme position, so-called idle, in which the lever (14) places the rod (5) in its idle position, and a second extreme position, called full gas, in which the lever (14) places the rod (5) in its full position gas, a first means (38) for adjusting the position of the axis (R) of rotation of the lever (14) in a first direction (X) parallel to the axis (T) of movement of the rod (5) , and a second means (40) for adjusting the position of the axis (R) of rotation of the lever (14) in a second direction perpendicular to the axis (T) of movement of the rod (5) and to rotation axis of the lever (14). Dispositif (13) d'actionnement selon la revendication 1, qui comprend : - un carter primaire (16) dans lequel est reçu le levier (14), le premier moyen (38) d'ajustement comprenant une première cale interposée entre une face externe (4) sur la pompe (2), perpendiculaire à la direction (T) de déplacement de la tige (5), et une première face d'appui (39) en regard sur le carter primaire (16), et - un carter secondaire (17) portant l'axe (R) de rotation du levier (14), le second moyen (40) d'ajustement comprenant une seconde cale interposée entre une seconde face d'appui (41) sur le carter primaire (16), sensiblement perpendiculaire à la première surface d'appui (39) et parallèle à l'axe (R) de rotation du levier (14), et une face d'appui (42) en regard sur le carter secondaire (17). An actuating device (13) according to claim 1 which comprises: a primary casing (16) in which the lever (14) is received, the first adjustment means (38) comprising a first wedge interposed between an outer face (4) on the pump (2), perpendicular to the direction (T) of displacement of the rod (5), and a first bearing face (39) facing the primary casing (16), and a secondary casing (17) carrying the axis (R) of rotation of the lever (14), the second means (40) of adjustment comprising a second shim interposed between a second bearing face (41) on the primary casing (16), substantially perpendicular to the first bearing surface (39) and parallel to the axis (R) of rotation of the lever (14), and a bearing face (42) facing the secondary casing (17). ). Dispositif (13) selon la revendication 2, dans lequel la première et/ou la seconde cale (38, 40) se présente sous la forme d'une cale pelable.Device (13) according to claim 2, wherein the first and / or second shim (38, 40) is in the form of a peelable shim. Dispositif (13) selon l'une des revendications 1 à 3, qui comprend deux surfaces de butée (35, 36) limitant la course angulaire du levier (14).Device (13) according to one of claims 1 to 3, which comprises two abutment surfaces (35, 36) limiting the angular stroke of the lever (14). Dispositif (13) selon l'une des revendications 1 à 3, qui comprend un groupe moto-réducteur (21) couplé à l'axe (R) de rotation du levier (14).Device (13) according to one of claims 1 to 3, which comprises a geared motor unit (21) coupled to the axis (R) of rotation of the lever (14). Dispositif (13) selon la revendication 5, dans lequel le groupe moto-réducteur (21) est couplé à l'axe (R) de rotation du levier (14) par l'intermédiaire d'un limiteur (28) de couple de surpassement.Device (13) according to claim 5, wherein the geared motor unit (21) is coupled to the axis (R) of rotation of the lever (14) via a limiter (28) surge torque . Dispositif (13) selon l'une des revendications 1 à 6, qui comprend un levier (31) de commande manuelle de secours de la position du levier d'actionnement (14), fixé à l'axe de rotation (R) de celui-ci.Device (13) according to one of claims 1 to 6, which comprises a lever (31) of emergency manual control of the position of the actuating lever (14), fixed to the axis of rotation (R) of the -this. Système (1) comprenant une pompe à injection (2) et un dispositif d'actionnement (13) selon l'une des revendications 1 à 7.System (1) comprising an injection pump (2) and an actuating device (13) according to one of Claims 1 to 7. Procédé de montage d'un dispositif d'actionnement (13) d'une tige (5) de régulation du débit d'une pompe à injection (2), cette tige (5) étant mobile en translation, par rapport à un corps de pompe (3) et suivant un axe (T) de déplacement perpendiculaire à une face externe (4) du corps de pompe (3), entre une première position extrême, dite de ralenti, dans laquelle elle commande un débit minimum de la pompe (2), et une seconde position extrême, dite de plein gaz dans laquelle elle commande un débit maximum de la pompe (2), le dispositif (13) comportant un levier (14) d'actionnement de la tige, ce levier (14) étant reçu dans un carter primaire (16), en étant monté pivotant autour d'un axe (R) de rotation porté par un carter secondaire (17), entre une première position extrême, dite de ralenti, et une seconde position extrême, dite de plein gaz, le levier (14) définissant entre ses positions extrêmes une course (α) angulaire, ce procédé comprenant les étapes de : - fixation du carter primaire (16) au corps de pompe (3), avec interposition, entre la face externe (4) de celui-ci et une première face d'appui (39) en regard sur le carter primaire (16), d'une première cale (38), et - fixation du carter secondaire (17) au carter primaire (16), avec interposition, entre une seconde face d'appui (41) sur le carter primaire (16), perpendiculaire à la première face d'appui (39) et parallèle à l'axe (R) de rotation du levier (14), et une face d'appui (42) en regard sur le carter secondaire (17), d'une seconde cale (40), dans lequel l'épaisseur des cales (38, 40) dépend des positions extrêmes de la tige (5) de réglage et de la course angulaire du levier (14).Method for mounting an actuating device (13) for a flow control rod (5) an injection pump (2), this rod (5) being movable in translation relative to a pump body (3) and along an axis (T) of displacement perpendicular to an outer face (4) of the body of pump (3), between a first extreme position, referred to as idle position, in which it controls a minimum flow rate of the pump (2), and a second extreme position, referred to as a full throttle position in which it controls a maximum flow rate of the pump ( 2), the device (13) comprising a lever (14) for actuating the rod, this lever (14) being received in a primary casing (16), being pivotally mounted about an axis (R) of rotation carried by a secondary casing (17), between a first extreme position, called idle, and a second extreme position, called full throttle, the lever (14) defining between its extreme positions an angular stroke (α), this method comprising the steps of: - Fixing the primary housing (16) to the pump body (3), with interposition, between the outer face (4) thereof and a first bearing surface (39) facing the primary casing (16), a first hold (38), and - Attaching the secondary housing (17) to the primary housing (16), with interposition, between a second bearing surface (41) on the primary casing (16), perpendicular to the first bearing face (39) and parallel to the axis (R) of rotation of the lever (14), and a bearing face (42) opposite the secondary casing (17), of a second shim (40), wherein the thickness of the shims (38, 40) depends on the extreme positions of the adjusting rod (5) and the angular stroke of the lever (14).
EP06291026A 2005-07-01 2006-06-22 Control rod actuation device for controlling the flow of an injection pump Not-in-force EP1741903B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2473116A1 (en) * 1979-12-22 1981-07-10 Daimler Benz Ag Vibration reducer for vehicle engine - detects engine movement to control fuel injection to compensate ignition point changes
EP0037389A2 (en) * 1980-03-27 1981-10-07 Friedmann & Maier Aktiengesellschaft Injection device
DE3242876A1 (en) * 1981-12-30 1983-07-14 Friedmann & Maier AG, 5400 Hallein, Salzburg Controller for the quantity control of injection pumps of an injection internal-combustion engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2473116A1 (en) * 1979-12-22 1981-07-10 Daimler Benz Ag Vibration reducer for vehicle engine - detects engine movement to control fuel injection to compensate ignition point changes
EP0037389A2 (en) * 1980-03-27 1981-10-07 Friedmann & Maier Aktiengesellschaft Injection device
DE3242876A1 (en) * 1981-12-30 1983-07-14 Friedmann & Maier AG, 5400 Hallein, Salzburg Controller for the quantity control of injection pumps of an injection internal-combustion engine

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FR2887932A1 (en) 2007-01-05
ATE384863T1 (en) 2008-02-15
EP1741903B1 (en) 2008-01-23
FR2887932B1 (en) 2007-11-16
DE602006000484D1 (en) 2008-03-13

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