EP0037296A2 - Apparatus for metering an injected fuel quantity in a fuel-injection engine - Google Patents

Apparatus for metering an injected fuel quantity in a fuel-injection engine Download PDF

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Publication number
EP0037296A2
EP0037296A2 EP81400339A EP81400339A EP0037296A2 EP 0037296 A2 EP0037296 A2 EP 0037296A2 EP 81400339 A EP81400339 A EP 81400339A EP 81400339 A EP81400339 A EP 81400339A EP 0037296 A2 EP0037296 A2 EP 0037296A2
Authority
EP
European Patent Office
Prior art keywords
bore
shuttle
channels
pump
distributor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP81400339A
Other languages
German (de)
French (fr)
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EP0037296A3 (en
EP0037296B1 (en
Inventor
Jean Bourdier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FR8007158A external-priority patent/FR2479334B1/en
Priority claimed from FR8012401A external-priority patent/FR2484024B2/en
Application filed by Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0037296A2 publication Critical patent/EP0037296A2/en
Publication of EP0037296A3 publication Critical patent/EP0037296A3/en
Application granted granted Critical
Publication of EP0037296B1 publication Critical patent/EP0037296B1/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/02—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements
    • F02M41/06—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements the distributor rotating
    • F02M41/063—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor being spaced from pumping elements the distributor rotating the distributor and rotary valve controlling fuel passages to pumping elements being combined
    • 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
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
    • F02M41/10—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor
    • F02M41/12—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor
    • F02M41/123—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor characterised by means for varying fuel delivery or injection timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/32—Varying fuel delivery in quantity or timing fuel delivery being controlled by means of fuel-displaced auxiliary pistons, which effect injection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/24—Fuel-injection apparatus with sensors

Definitions

  • the invention relates to fuel injection systems for internal combustion engines. Of fa- 'Con More specifically, it relates to a device for measuring the volume of fuel introduced into the engine at each opening of an injector.
  • Knowing the precise volume of fuel introduced at each opening of an injector is particularly useful for acting on the engine supply, with a view to obtaining optimum efficiency and reducing the quantity of polluting gases contained in the exhaust gases. .
  • This action on the supply can be done by modulating the quantity of exhaust gas recycled as a function of the volume of fuel injected and / or by correcting the volume injected as a function of the quantity of air admitted so as to maintain the richness of the mixing between very narrow limits.
  • the object of the invention is to provide a more precise measuring device, which takes into account the volume of fuel actually delivered by the pump, which indicates the instant of the start of injection and which is also applicable to all types of injection pumps.
  • the invention therefore relates to a device for measuring the volume of fuel delivered by an injector at each opening, in an injection supply assembly for a heat engine comprising a distributing injection pump delivering to at least one injector, this measuring device comprising a movable shuttle in front of a displacement sensor, received in a bore located in the engine supply circuit.
  • This device is characterized in that said bore containing the shuttle is disposed on the delivery path from the injection pump to the or each injector.
  • the injection pump is of the intake control type, comprising a body delimiting a cylinder in which is rotatably mounted a rotor comprising a pump part formed by a bore arranged radially relative to the axis of the rotor and in which are received opposite free pistons situated in line with a fixed annular cam, a distributor part and an axial channel connecting the two parts
  • the measuring device is further characterized in that the axial channel is interrupted and separated in two sections respectively connected one to the pump part and the other to the distributor part, a series of channels extending from each section and opening at the periphery of the rotor to cooperate with two channels formed in the body and connected each at a respective end of the bore in which the shuttle is received, the relative arrangement of the rotor channels and the channels formed in the body being such that during the rotation of the rotor, the two sections are p periodically and simultaneously placed in communication with the ends of the bore containing the shuttle.
  • a pump body 1 contains an injection piston 2 sliding in a bore 3 and a distributor 4 rotating in a bore 5.
  • a spring 1 permanently maintains the piston 2, the pusher 10, the roller 9 and the cam 8 in contact with one another.
  • the shaft 6 has a polygonal axial housing 12 which cooperates with a conjugate finger 13 of the distributor 4 to drive the latter in rotation, in synchronism with the reciprocating movement of the piston 2.
  • the end of the piston 2 forms, in the bottom of the bore 3 a chamber 14.
  • the latter communicates, by a longitudinal channel 15 and a transverse channel 16 with a chamber annular 17 formed with the bore 3 by a narrowed part of the piston 2.
  • the annular chamber 17 is limited, on one side, by a helical ramp 18 of the piston 2.
  • This chamber 17 comes into communication with a discharge orifice 19 when, in the discharge movement of the piston 2, the ramp 18 reaches the level of the orifice 19.
  • the angular position of the piston 2 is defined by a rack 20 acting on a pinion 21 integral in rotation but not in sliding, with the piston 2, thanks to a flat 22.
  • the chamber 14 communicates by a channel 23 with a bore 24 in which slides, without play, a shuttle 25 pushed by a spring 26 towards the bottom of the bore 24 where the channel 23 opens.
  • the shuttle thus delimits in the bore 24 two rooms 24a and 24.
  • From the other end of the bore 24, that is to say of the chamber 24 b leaves a channel 27 which terminates in the bore 5 facing a groove 28 formed in the distributor 4.
  • the groove 28 is in permanent communication with a longitudinal groove 29 of the distributor 4, a groove which passes successively, during the rotation of the distributor 4, in front of starting orifices 30 towards injectors 31 of which only one is shown.
  • the dispenser 4 also has longitudinal grooves 32 connected together by transverse channels 33 and located at three channels 3 4, 3 5 and 3 6. Through the channel 34 comes fuel under low pressure, coming from a pump transfer, not shown.
  • the channel 35 ends in the chamber 14.
  • the channel 36 ends in the chamber 24b of the bore 24.
  • the channels 35 and 36 may alternatively comprise a common part, starting from the bore 5.
  • a displacement sensor 37 which can, for example, be a capacitive sensor and which is connected to appropriate means (not shown) for processing and exploiting the information which are supplied by the sensor 37 as well as on the various operating parameters of the engine: speed, load temperature.
  • the channels 35 and 36 are closed by the distributor 4 and the fuel discharged by the piston 2 pushes the shuttle 25, which in turn discharges fuel, through the channel 27, to that of the injectors 31 connected to the orifice 30 which communicates with the groove 29 of the distributor 4.
  • the end of the delivery which determines the quantity of fuel injected, occurs when the annular chamber 17 of the piston 2 is placed in communication with the discharge orifice 19.
  • the senor 37 makes it possible to know on the one hand, the precise instant of the start of the injection, corresponding to the start of the movement of the shuttle 25, and the volume of fuel injected, corresponding to the travel of the shuttle 25.
  • the measurement is carried out on the delivery path from piston 2 to the injectors, it is not distorted by internal leaks from the pump or by the development, over time, of internal clearances and this constitutes a decisive advantage as regards the accuracy of the measurement and its fidelity over time.
  • a pump body 40 contains a fixed cylinder 41 in a bore 42 of which is mounted a piston 43.
  • the latter is driven, in a known manner, from a motor, not shown, in a continuous rotary movement and according to a reciprocating axial movement.
  • a head 44 is attached, blocked by a screw 45.
  • the piston 43 has longitudinal grooves 46 which open into a chamber 47 formed, in the bore 42, between the end of the piston 43 and the head 44. During the rotation of the piston 43, these grooves 46 pass in front of an orifice supply 48 and in front of orifices 49 connected by channels 50 to a bore 51 formed in the head 44.
  • One of the channels 50 is extended by a channel 56 to a transverse passage 57 which opens into the bore 42 facing a groove 58 of the piston 43. From this groove leaves a longitudinal groove 59 which passes successively, during the rotation of the piston 43, in front of orifices 60 starting towards injectors, not shown.
  • the piston 43 also comprises a central channel 61 connecting the chamber 47 to a transverse passage 62 closed by a ring 63 but opening to the atmosphere, out of the ring 63, from a certain delivery stroke of the piston 43.
  • venting of passage 62 corresponds to the end of the injection. It intervenes for a variable stroke of the piston 43, as a function of the position of the ring 63 determined by an eccentric control 64.
  • a displacement sensor 65 which plays the same role as that of the first example described.
  • the orifices 48 and 40 are closed by the piston 43.
  • the fuel discharged by the latter repels the shuttle 52, which, in turn, repels fuel through the. channel 56 towards that of the injectors connected to the orifice 60 which communicates with the groove 59 of the piston 43.
  • the end of the delivery which determines the quantity of fuel injected, occurs when the passage 62 opens out from the ring 63.
  • the senor 65 makes it possible to detect the precise instant of the start of the injection, corresponding to the start of the movement of the shuttle 52, and to determine the volume of fuel injected, corresponding to the stroke of the shuttle 52 The same advantages are therefore obtained, with a different type of pump.
  • the pump shown in Figs. 3 to 7 comprises a body 101 containing a fixed cylinder 102 in a bore 103 from which rotates a rotor 104, driven in a known manner by a heat engine, not shown.
  • the rotor 104 comprises a pump part 105 and a distributor part 106.
  • the axis of the cylinder and of the rotor is designated by the reference X-X.
  • a radial bore 107 contains two free pistons 108 whose outer faces are in contact with pads 109 carrying rollers 110 situated at the right of a fixed annular cam 111.
  • the central part of the bore 107 forms, between the two pistons 108, a chamber 112 from which an axial channel 113 leading to radial channels 114 including. the number corresponds to the number of engine cylinders.
  • the fixed cylinder 102 In line with the radial channels 114, that is to say in the same plane perpendicular to the axis XX of the rotor, the fixed cylinder 102 comprises a radial channel 115 which opens into a chamber 116 situated opposite a bore 117 formed in the body 101.
  • a shuttle 118 In this bore slides, without play, a shuttle 118 provided with a flange 119. The latter limits the movement of the shuttle 118 towards the chamber 116 by coming into abutment against a radial bearing surface 120. It also cooperates with a displacement sensor 121 mounted in a plug 122 screwed into the body 101 concentrically with the bore 117.
  • a spring 123 disposed between the plug 122 and the shuttle 118 tends to push the latter until the flange 119 comes into abutment on the surface 120.
  • the plug 122 and the shuttle 118 define a chamber 124 from which a channel 125 pierced in the body 101 and the fixed cylinder 102.
  • the part of the distributor 106 of the rotor 104 has an axial channel 126 connecting radial channels 127 to a single radial channel 128.
  • Channels 127 are located to the right of channel 125.
  • the number and angular position of channels 127 and channels 114 are the same.
  • the channel 128 passes successively, during the rotation of the rotor 104, in front of the starting channels 129 to the injectors, not shown.
  • the rotor 104 also comprises longitudinal grooves 130 located between the outlets of the channels 114 and 127 intended to intermittently connect the channels 115 and 125.
  • Low pressure fuel coming from a transfer pump, not shown, arrives via a duct 131 with two channels 132, 133.
  • the channel 132 is located at the right of the radial channels 127.
  • the channel 133 on the path of which is interposed a member 134 for adjusting the flow rate, known per se, is situated in line with the radial channels 114.
  • the grooves 130 provide the connection between the channels 115 and 125 which freely balances the pressures in the chambers 116 and 124 located on either side of the shuttle 118. Under the action of the spring 123 , the shuttle 118 is then pushed until its flange 119 comes into abutment against the surface 120.
  • the fuel is returned by bringing the pistons 108 together under the action of the cam 111. This delivery occurs when one of the channels 114 coincides with the channel 115 and one of the channels 127 coincides with the channel 125 , while the channel 128 coincides with one of the channels 129 from the start to an injector.
  • the fuel discharged by the pistons 108 displaces the shuttle 118 which, in turn, discharges the fuel towards one of the injectors.
  • the control of the movements of the shuttle 118 by the sensor 121 makes it possible to know with great precision the start of the delivery and the quantity of fuel delivered.

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

Abstract

1. A device for injecting fuel into a heat engine, comprising a distributing injection pump (1-5; 40-43; 101, 106) connected to a low-pressure fuel source and including, on one hand, a part constituting a pump proper comprising a discharge chamber (14; 47; 112) and a device (18-21; 62-64; 134) for regulating the quantity of fuel to be injected, and, on the other hand, a part constituting a distributor toward a plurality of injectors, and a device for measuring the quantity of fuel injected, of the type comprising a shuttle member (25; 52; 118) movable in a bore (24; 51; 117) provided in a fixed part of the injection pump and a sensor (37; 65; 121) responsive to the displacements of this shuttle member (25; 52; 118), characterised in that the bore (24; 51; 117) of the measuring device comprises a first end (24a; 51a; 116) hydraulically connected to the discharge chamber (14; 47; 112) of the part constituting a pump, at least during the discharge stage of this part constituting a pump, and an opposite end (24b; 51b; 124) solely and successively connected through the part constituting a distributor, on one hand, to the low-pressure fuel source and, on the other hand, to the injectors, the shuttle member being biased by a spring (26; 53; 123) toward said first end of the bore to its initial position.

Description

L'invention concerne les systèmes d'alimentation, par injection de carburant, des moteurs thermiques. De fa- :' çon plus précise, elle se rapporte à un dispositif destiné à mesurer le volume de carburant introduit dans le moteur à chaque ouverture d'un injecteur.The invention relates to fuel injection systems for internal combustion engines. Of fa- 'Con More specifically, it relates to a device for measuring the volume of fuel introduced into the engine at each opening of an injector.

La connaissance du volume précis de carburant introduit à chaque ouverture d'un injecteur est particulièrement utile pour agir sur l'alimentation du moteur, en vue d'obtenir un rendement optimal et de réduire la quantité de gaz polluants contenus dans les gaz d'échappement.Knowing the precise volume of fuel introduced at each opening of an injector is particularly useful for acting on the engine supply, with a view to obtaining optimum efficiency and reducing the quantity of polluting gases contained in the exhaust gases. .

Cette action sur l'alimentation peut se faire en modulant la quantité de gaz d'échappement recyclés en fonction du volume de carburant injecté et/ou en corrigeant le volume injecté en fonction de la quantité d'air admise de façon à maintenir la richesse du mélange entre des limites très étroites.This action on the supply can be done by modulating the quantity of exhaust gas recycled as a function of the volume of fuel injected and / or by correcting the volume injected as a function of the quantity of air admitted so as to maintain the richness of the mixing between very narrow limits.

Il a déjà été proposé de mesurer le volume du carburant injecté au moyen d'un dispositif constitué par une navette mobile dans un alésage interposé dans le circuit d'alimentation, ladite navette étant associée à un capteur de déplacement. (FR 79 07 301 demandée le 22 Mars 1979). Dans cet agencement connu, le dispositif de mesure est placé sur l'arrivée de carburant à la pompe d'injection, ce qui présente notamment les inconvénients suivants : en premier lieu, la mesure est peu précise, du fait que le dispositif ne tient pas compte des fuites internes de la pompe d'injection ; en second lieu, ce dispositif n'est applicable qu'à des pompes à dosage d'admission, c'est-à-dire des pompes pour lesquelles le volume refoulé est déterminé par le volume admis ; enfin, ce dispositif ne permet pas de connaitre le moment du début de l'injection.It has already been proposed to measure the volume of fuel injected by means of a device constituted by a mobile shuttle in a bore interposed in the supply circuit, said shuttle being associated with a displacement sensor. (FR 79 07 301 requested on March 22, 1979). In this known arrangement, the measuring device is placed on the fuel supply to the injection pump, which has the following disadvantages in particular: firstly, the measurement is not very precise, since the device does not hold account of internal leaks from the injection pump; secondly, this device is only applicable to intake metering pumps, that is to say pumps for which the pumped volume is determined by the admitted volume; finally, this device does not make it possible to know when the injection begins.

Le but de l'invention est de fournir un dispositif de mesure plus précis, qui prenne en compte le volume de carburant réellement refoulé par la pompe, qui indique l'instant du début de l'injection et qui soit en outre applicable à tous les types de pompes d'injection.The object of the invention is to provide a more precise measuring device, which takes into account the volume of fuel actually delivered by the pump, which indicates the instant of the start of injection and which is also applicable to all types of injection pumps.

L'invention concerne donc un dispositif de mesure du volume de carburant délivré par un injecteur à chaque ouverture, dans un ensemble d'alimentation par injection pour moteur thermique comprenant une pompe d'injection distributrice refoulant vers au moins un injecteur, ce dispositif de mesure comportant une navette mobile devant un capteur de déplacement, reçue dans un alésage situé dans le circuit d'alimentation du moteur.The invention therefore relates to a device for measuring the volume of fuel delivered by an injector at each opening, in an injection supply assembly for a heat engine comprising a distributing injection pump delivering to at least one injector, this measuring device comprising a movable shuttle in front of a displacement sensor, received in a bore located in the engine supply circuit.

Ce dispositif est caractérisé en ce que ledit alésage contenant la navette est disposé sur le trajet de refoulement de la pompe d'injection vers le ou chaque injecteur.This device is characterized in that said bore containing the shuttle is disposed on the delivery path from the injection pump to the or each injector.

Dans le cas où la pompe d'injection est du type à réglage d'admission, comprenant un corps délimitant un cylindre dans lequel est monté rotatif un rotor comportant une partie pompe formée par un alésage disposé radialement par rapport à l'axe du rotor et dans lequel sont reçus des pistons libres opposés situés au droit d'une came annulaire fixe, une partie distributeur et un canal axial reliant les deux parties, le dispositif de mesure est de plus caract érisé en ce que le canal axial est interrompu et séparé en deux tronçons reliés respectivement l'un à la partie pompe et l'autre à la partie distributeur, une série de canaux s'étendant à partir de chaque tronçon et débouchant à la périphérie du rotor pour coopérer avec deux canaux ménagés dans le corps et reliés chacun à une extrémité respective de l'alésage dans lequel est reçue la navette, l'agencement relatif des canaux du rotor et des canaux ménagés dans le corps étant tel que lors de la rotation du rotor, les deux tronçons sont périodiquement et simultanément mis en communication avec les extrémités de l'alésage contenant la navette.In the case where the injection pump is of the intake control type, comprising a body delimiting a cylinder in which is rotatably mounted a rotor comprising a pump part formed by a bore arranged radially relative to the axis of the rotor and in which are received opposite free pistons situated in line with a fixed annular cam, a distributor part and an axial channel connecting the two parts, the measuring device is further characterized in that the axial channel is interrupted and separated in two sections respectively connected one to the pump part and the other to the distributor part, a series of channels extending from each section and opening at the periphery of the rotor to cooperate with two channels formed in the body and connected each at a respective end of the bore in which the shuttle is received, the relative arrangement of the rotor channels and the channels formed in the body being such that during the rotation of the rotor, the two sections are p periodically and simultaneously placed in communication with the ends of the bore containing the shuttle.

Trois exemples de réalisation font l'objet de la description qui suit, en référence aux dessins joints, dans lesquels :

  • - la Fig. 1 représente, schématiquement, une pompe distributrice à distributeur séparé, agencée selon l'invention ;
  • - la Fig. 2 représente une application à une pompe distributrice à distributeur intégré ;
  • - la Fig. 3 est une coupe axiale schématique d'une pompe à réglage d'admission, aménagée selon l'invention, le rotor occupant une position correspondant à une phase d'injection ;
  • - la Fig. 4 est une section partielle selon la ligne 4-4 de la Fig. 3 ,
  • - la Fig. 5 est une section partielle selon la ligne 5-5 de la Fig. 3;
  • - les Fig. 6 et 7 sont deux coupes axiales partielles de la pompe de la Fig. 3 pour deux autres positions du rotor par rapport au corps de la pompe.
Three embodiments are the subject of the description which follows, with reference to the accompanying drawings, in which:
  • - Fig. 1 shows, schematically, a distributor pump with separate distributor, arranged according to the invention;
  • - Fig. 2 shows an application to a distributor pump with integrated distributor;
  • - Fig. 3 is a schematic axial section of an intake control pump, arranged according to the invention, the rotor occupying a position corresponding to an injection phase;
  • - Fig. 4 is a partial section along line 4-4 of FIG. 3,
  • - Fig. 5 is a partial section along line 5-5 of FIG. 3;
  • - Figs. 6 and 7 are two partial axial sections of the pump of FIG. 3 for two other positions of the rotor relative to the pump body.

En se référant à la Fig. 1, un corps de pompe 1 contient un piston d'injection 2 coulissant dans un alésage 3 et un distributeur 4 tournant dans un alésage 5.Referring to FIG. 1, a pump body 1 contains an injection piston 2 sliding in a bore 3 and a distributor 4 rotating in a bore 5.

Un arbre 6, porté par deux roulements 7, porte une came 8 qui, par l'intermédiaire d'un galet 9 et d'un poussoir 10, entraîne le piston 2 suivant un mouvement linéaire alternatif. Un ressort 1 maintient en permanence le piston 2, le poussoir 10, le galet 9 et la came 8 en contact l'un avec l'autre. L'arbre 6 présente un logement axial polygonal 12 qui coopère avec un doigt conjugué 13 du distributeur 4 pour entraîner ce dernier en rotation, en synchronisme avec le mouvement alternatif du piston 2.A shaft 6, carried by two bearings 7, carries a cam 8 which, by means of a roller 9 and a pusher 10, drives the piston 2 in a reciprocating linear movement. A spring 1 permanently maintains the piston 2, the pusher 10, the roller 9 and the cam 8 in contact with one another. The shaft 6 has a polygonal axial housing 12 which cooperates with a conjugate finger 13 of the distributor 4 to drive the latter in rotation, in synchronism with the reciprocating movement of the piston 2.

L'extrémité du piston 2 forme, dans le fond de l'alésage 3 une chambre 14. Cette dernière communique, par un canal longitudinal 15 et un canal transversal 16 avec une chambre annulaire 17 formée avec l'alésage 3 par une partie rétrécie du piston 2. La chambre annulaire 17 est limitée, d'un côté, par une rampe hélicoïdale 18 du piston 2.The end of the piston 2 forms, in the bottom of the bore 3 a chamber 14. The latter communicates, by a longitudinal channel 15 and a transverse channel 16 with a chamber annular 17 formed with the bore 3 by a narrowed part of the piston 2. The annular chamber 17 is limited, on one side, by a helical ramp 18 of the piston 2.

Cette chambre 17 entre en communication avec un orifice de décharge 19 lorsque, dans le mouvement de refoulement du piston 2, la rampe 18 atteint le niveau de l'orifice 19. La mise en communication de la chambre 17 avec l'orifice 19, qui correspond à la fin de l'injection, intervient pour une course de refoulement variable du piston 2, dépendant de sa position angulaire.This chamber 17 comes into communication with a discharge orifice 19 when, in the discharge movement of the piston 2, the ramp 18 reaches the level of the orifice 19. The communication of the chamber 17 with the orifice 19, which corresponds to the end of the injection, intervenes for a variable delivery stroke of the piston 2, depending on its angular position.

La position angulaire du piston 2 est définie par une crémaillère 20 agissant sur un pignon 21 solidaire en rotation mais non en coulissement, du piston 2, grâce à un méplat 22.The angular position of the piston 2 is defined by a rack 20 acting on a pinion 21 integral in rotation but not in sliding, with the piston 2, thanks to a flat 22.

La chambre 14 communique par un canal 23 avec un alésage 24 dans lequel coulisse, sans jeu, une navette 25 repoussée par un ressort 26 vers le fond de l'alésage 24 où débouche le canal 23. La navette délimite ainsi dans l'alésage 24 deux chambres 24a et 24 . De l'autre extrémité de l'alésage 24 c'est à dire de la chambre 24b, part un canal 27 qui aboutit dans l'alésage 5 face à une gorge 28 ménagée dans le distributeur 4. La gorge 28 est en communication permanente-avec une rainure longitudinale 29 du distributeur 4, rainure qui passe successivement, au cours de la rotation du distributeur 4, devant des orifices 30 de départ vers des injecteurs 31 dont un seul est représenté.The chamber 14 communicates by a channel 23 with a bore 24 in which slides, without play, a shuttle 25 pushed by a spring 26 towards the bottom of the bore 24 where the channel 23 opens. The shuttle thus delimits in the bore 24 two rooms 24a and 24. From the other end of the bore 24, that is to say of the chamber 24 b , leaves a channel 27 which terminates in the bore 5 facing a groove 28 formed in the distributor 4. The groove 28 is in permanent communication with a longitudinal groove 29 of the distributor 4, a groove which passes successively, during the rotation of the distributor 4, in front of starting orifices 30 towards injectors 31 of which only one is shown.

Le distributeur 4 comporte en outre des rainures longitudinales 32 reliées ensemble par des canaux transversaux 33 et situées au niveau de trois canaux 3 4, 3 5 et 3 6. Par le canal 34 arrive du carburant sous basse pression, en provenance d'une pompe de transfert, non représentée. Le canal 35 aboutit dans la chambre 14. Le canal 36 aboutit dans la chambre 24b de l'alésage 24. Les canaux 35 et 36 peuvent en variante comporter une partie commune, à partir de l'alésage 5.The dispenser 4 also has longitudinal grooves 32 connected together by transverse channels 33 and located at three channels 3 4, 3 5 and 3 6. Through the channel 34 comes fuel under low pressure, coming from a pump transfer, not shown. The channel 35 ends in the chamber 14. The channel 36 ends in the chamber 24b of the bore 24. The channels 35 and 36 may alternatively comprise a common part, starting from the bore 5.

Autour de l'alésage 24, face à la navette 25, est disposé un capteur de déplacement 37 qui peut, par exemple, être un capteur capacitif et qui est relié à des moyens appropriés (non représentés) de traitement et d'exploitation des informations qui sont fournies par le capteur 37 ainsi que sur les différents paramètres de fonctionnement du moteur : vitesse, charge température.Around the bore 24, facing the shuttle 25, is arranged a displacement sensor 37 which can, for example, be a capacitive sensor and which is connected to appropriate means (not shown) for processing and exploiting the information which are supplied by the sensor 37 as well as on the various operating parameters of the engine: speed, load temperature.

Le fonctionnement de l'ensemble décrit est le suivant :

  • Pendant la phase d'aspiration du piston 2, du carburant provenant du canal 34 est envoyé, à travers les rainures 32, les canaux 33,35 et 36 vers la chambre 14 et dans l'alésage 24.
The operation of the assembly described is as follows:
  • During the suction phase of the piston 2, fuel coming from the channel 34 is sent, through the grooves 32, the channels 33, 35 and 36 to the chamber 14 and into the bore 24.

Pendant la phase de refoulement du piston 2, les canaux 35 et 36 sont obturés par le distributeur 4 et le carburant refoulé par le piston 2 repousse la navette 25, qui à son tour, refoule du carburant, par le canal 27, vers celui des injecteurs 31 relié à l'orifice 30 qui communique avec la rainure 29 du distributeur 4. La fin du refoulement, qui détermine la quantité de carburant injecté, intervient lorsque la chambre annulaire 17 du piston 2 est mise en communication avec l'orifice de décharge 19.During the discharge phase of the piston 2, the channels 35 and 36 are closed by the distributor 4 and the fuel discharged by the piston 2 pushes the shuttle 25, which in turn discharges fuel, through the channel 27, to that of the injectors 31 connected to the orifice 30 which communicates with the groove 29 of the distributor 4. The end of the delivery, which determines the quantity of fuel injected, occurs when the annular chamber 17 of the piston 2 is placed in communication with the discharge orifice 19.

On voit donc que le capteur 37 permet de connaitre d'une part, l'instant précis du début de l'injection, correspondant au début du déplacement de la navette 25, et le volume de carburant injecté, correspondant à la course de la navette 25.It can therefore be seen that the sensor 37 makes it possible to know on the one hand, the precise instant of the start of the injection, corresponding to the start of the movement of the shuttle 25, and the volume of fuel injected, corresponding to the travel of the shuttle 25.

A partir de ces informations et des autres informations disponibles, il est possible d'agir par des moyens connus sur le débit des gaz d'échappement recyclés et/ou sur le volume de carburant injecté et/ou sur le début de l'injection de manière à maintenir les conditions optimales d'alimentation.From this information and other available information, it is possible to act by known means on the flow rate of recycled exhaust gases and / or on the volume of fuel injected and / or on the start of injection of so as to maintain optimal feeding conditions.

La mesure étant effectuée sur le trajet de refoulement du piston 2 vers les injecteurs, elle n'est pas faussée par les fuites internes de la pompe ni par l'évolution, dans le temps, des jeux internes et ceci constitue un avantage décisif quant à la précision de la mesure et à sa fidélité dans le temps.Since the measurement is carried out on the delivery path from piston 2 to the injectors, it is not distorted by internal leaks from the pump or by the development, over time, of internal clearances and this constitutes a decisive advantage as regards the accuracy of the measurement and its fidelity over time.

Dans l'exemple de la Fig. 2, un corps de pompe 40 contient un cylindre fixe 41 dans un alésage 42 duquel est monté un piston 43. Ce dernier est entraîné, de façon connue, à partir d'un moteur, non représenté, suivant un mouvement rotatif continu et suivant un mouvement axial alternatif.In the example of FIG. 2, a pump body 40 contains a fixed cylinder 41 in a bore 42 of which is mounted a piston 43. The latter is driven, in a known manner, from a motor, not shown, in a continuous rotary movement and according to a reciprocating axial movement.

Dans le prolongement du cylindre 41 est rapportée une tête 44 bloquée par une vis 45.In the extension of the cylinder 41, a head 44 is attached, blocked by a screw 45.

Le piston 43 comporte des rainures longitudinales 46 qui débouchent dans une chambre 47 formée, dans l'alésage 42, entre l'extrémité du piston 43 et la tête 44. Au cours de la rotation du piston 43, ces rainures 46 passent devant un orifice d'alimentation 48 et devant des orifices 49 reliés par des canaux 50 à un alésage 51 ménagé dans la tête 44.The piston 43 has longitudinal grooves 46 which open into a chamber 47 formed, in the bore 42, between the end of the piston 43 and the head 44. During the rotation of the piston 43, these grooves 46 pass in front of an orifice supply 48 and in front of orifices 49 connected by channels 50 to a bore 51 formed in the head 44.

Dans l'alésage 51 coulisse, sans jeu, une navette 52 repoussée par un ressort 53 contre le fond de l'alésage dans lequel est ménagé un passage 54 de communication avec la chambre 47. Le ressort 53 s'appuie sur un bouchon 55 qui ferme l'alésage 51. Comme précédemment, on peut considérer que la navette 52 divise l'alésage 51 en deux chambres 51 a 51b,In the bore 51 slides, without play, a shuttle 52 pushed by a spring 53 against the bottom of the bore in which is formed a passage 54 for communication with the chamber 47. The spring 53 is supported on a plug 55 which closes the bore 51. As previously, it can be considered that the shuttle 52 divides the bore 51 into two chambers 51 a 51 b ,

L'un des canaux 50 est prolongé par un canal 56 jusqu'à un passage transversal 57 qui débouche dans l'alésage 42 face à une gorge 58 du piston 43. De cette gorge part une rainure longitudinale 59 qui passe successivement, au cours de la rotation du piston 43, devant des orifices 60 de départ vers des injecteurs, non représentés.One of the channels 50 is extended by a channel 56 to a transverse passage 57 which opens into the bore 42 facing a groove 58 of the piston 43. From this groove leaves a longitudinal groove 59 which passes successively, during the rotation of the piston 43, in front of orifices 60 starting towards injectors, not shown.

Le piston 43 comporte en outre un canal central 61 reliant la chambre 47 à un passage transversal 62 obturé par une bague 63 mais débouchant à l'atmosphère, hors de la bague 63, à partir d'une certaine course de refoulement du piston 43.The piston 43 also comprises a central channel 61 connecting the chamber 47 to a transverse passage 62 closed by a ring 63 but opening to the atmosphere, out of the ring 63, from a certain delivery stroke of the piston 43.

La mise à l'atmosphère du passage 62 correspond à la fin de l'injection. Elle intervient pour une course variable du piston 43, en fonction de la position de la bague 63 déterminée par une commande à ex.centrique 64.The venting of passage 62 corresponds to the end of the injection. It intervenes for a variable stroke of the piston 43, as a function of the position of the ring 63 determined by an eccentric control 64.

Dans la tête 44, autour de l'alésage 51, face à la navette 52, est disposé un capteur de déplacement 65 qui joue le même rôle que celui du premier exemple décrit.In the head 44, around the bore 51, facing the shuttle 52, is arranged a displacement sensor 65 which plays the same role as that of the first example described.

Le fonctionnement de ce second exemple est le suivant :

  • Pendant la phase d'aspiration du piston 43, du carburant, introduit par le canal 48, remplit la chambre 47 et la chambre 51- de l'alésage 51.
The operation of this second example is as follows:
  • During the suction phase of the piston 43, fuel, introduced through the channel 48, fills the chamber 47 and the chamber 51- with the bore 51.

Pendant la phase de refoulement du piston 43, les orifices 48 et 40 sont obturés par le piston 43. Le carburant refoulé par ce dernier repousse la navette 52, qui, à son tour, repousse du carburant par le. canal 56 vers celui des injecteurs relié à l'orifice 60 qui communique avec la rainure 59 du pisTON 43. La fin du refoulement, qui détermine la quantité de carburant injecté, intervient lorsque le passage 62 débouche de la bague 63.During the discharge phase of the piston 43, the orifices 48 and 40 are closed by the piston 43. The fuel discharged by the latter repels the shuttle 52, which, in turn, repels fuel through the. channel 56 towards that of the injectors connected to the orifice 60 which communicates with the groove 59 of the piston 43. The end of the delivery, which determines the quantity of fuel injected, occurs when the passage 62 opens out from the ring 63.

Comme dans le premier exemple, le capteur 65 permet de détecter l'instant précis du début de l'injection, correspondant au début du déplacement de la navette 52, et de déterminer le volume de carburant injecté, correspondant à la course de la navette 52. Les mêmes avantages sont donc obtenus, avec un type de pompe différent.As in the first example, the sensor 65 makes it possible to detect the precise instant of the start of the injection, corresponding to the start of the movement of the shuttle 52, and to determine the volume of fuel injected, corresponding to the stroke of the shuttle 52 The same advantages are therefore obtained, with a different type of pump.

La pompe représentée aux Fig. 3 à 7 comprend un corps 101 contenant un cylindre fixe 102 dans un alésage 103 duquel tourne un rotor 104, entraîné de façon connue par un moteur thermique, non représenté. Le rotor 104 comprend une partie pompe 105 et une partie distributeur 106. L'axe du cylindre et du rotor est désigné par la référence X-X.The pump shown in Figs. 3 to 7 comprises a body 101 containing a fixed cylinder 102 in a bore 103 from which rotates a rotor 104, driven in a known manner by a heat engine, not shown. The rotor 104 comprises a pump part 105 and a distributor part 106. The axis of the cylinder and of the rotor is designated by the reference X-X.

Dans la partie pompe 105, un alésage radial 107 contient deux pistons libres 108 dont les faces extérieures sont au contact de patins 109 portant des galets 110 situés au droit d'une came annulaire fixe 111. La partie centrale de l'alésage 107 forme, entre les deux pistons 108, une chambre 112 d'où part un canal axial 113 aboutissant à des canaux radiaux 114 dont. le nombre correspond au nombre des cylindres du moteur.In the pump part 105, a radial bore 107 contains two free pistons 108 whose outer faces are in contact with pads 109 carrying rollers 110 situated at the right of a fixed annular cam 111. The central part of the bore 107 forms, between the two pistons 108, a chamber 112 from which an axial channel 113 leading to radial channels 114 including. the number corresponds to the number of engine cylinders.

Au droit des canaux radiaux 114, c'est à dire dans le même plan perpendiculaire à l'axe X-X du rotor, le cylindre fixe 102 comporte un canal radial 115 qui débouche dans une chambre 116 située face à un alésage 117 formé dans le corps 101. Dans cet alésage coulisse, sans jeu, une navette 118 munie d'une collerette 119. Cette dernière limite le déplacement de la navette 118 vers la chambre 116 par venue en butée contre une surface d'appui radiale 120. Elle coopère également avec un capteur de déplacement 121 monté dans un bouchon 122 vissé dans le corps 101 concentriquement à l'alésage 117. Un ressort 123, disposé entre le bouchon 122 et la navette 118 tend à repousser cette dernière jusqu'à venue en butée de la collerette 119 sur la surface 120. Le bouchon 122 et la navette 118 délimitent une chambre 124 d'où part un canal 125 percé dans le corps 101 et le cylindre fixe 102.In line with the radial channels 114, that is to say in the same plane perpendicular to the axis XX of the rotor, the fixed cylinder 102 comprises a radial channel 115 which opens into a chamber 116 situated opposite a bore 117 formed in the body 101. In this bore slides, without play, a shuttle 118 provided with a flange 119. The latter limits the movement of the shuttle 118 towards the chamber 116 by coming into abutment against a radial bearing surface 120. It also cooperates with a displacement sensor 121 mounted in a plug 122 screwed into the body 101 concentrically with the bore 117. A spring 123, disposed between the plug 122 and the shuttle 118 tends to push the latter until the flange 119 comes into abutment on the surface 120. The plug 122 and the shuttle 118 define a chamber 124 from which a channel 125 pierced in the body 101 and the fixed cylinder 102.

La partie du distributeur 106 du rotor 104 comporte un canal axial 126 reliant des canaux radiaux 127 à un canal radial unique 128. Les canaux 127 sont situés au droit du canal 125. Le nombre et la position angulaire des canaux 127 et des canaux 114 sont les mêmes. Le canal 128 passe successivement, au cours de la rotation du rotor 104, devant des canaux 129 de départ vers des injecteurs, non représentés.The part of the distributor 106 of the rotor 104 has an axial channel 126 connecting radial channels 127 to a single radial channel 128. Channels 127 are located to the right of channel 125. The number and angular position of channels 127 and channels 114 are the same. The channel 128 passes successively, during the rotation of the rotor 104, in front of the starting channels 129 to the injectors, not shown.

Le rotor 104 comporte en outre des rainures longitudinales 130 situées entre les débouchés des canaux 114 et 127 destinées à relier, par intermittence, les canaux 115 et 125.The rotor 104 also comprises longitudinal grooves 130 located between the outlets of the channels 114 and 127 intended to intermittently connect the channels 115 and 125.

Du carburant à basse pression, en provenance d'une pompe de transfert, non représentée, arrive par un conduit 131 à deux canaux 132, 133. Le canal 132 est situé au droit des canaux radiaux 127. Le canal 133, sur le parcours duquel est interposé un organe 134 de réglage du débit, connu en soi, est situé au droit des canaux radiaux 114.Low pressure fuel, coming from a transfer pump, not shown, arrives via a duct 131 with two channels 132, 133. The channel 132 is located at the right of the radial channels 127. The channel 133, on the path of which is interposed a member 134 for adjusting the flow rate, known per se, is situated in line with the radial channels 114.

La pompe qui vient d'être décrite, fonctionne comme suit :

  • L'admission de carburant se produit lorsque l'un des canaux 114 coïncide avec le canal 133. Le carburant introduit, dont la quantité dépend de la position de l'organe de réglage 134, repousse les pistons 108 radialement vers l'extérieur. Simultanément l'un des canaux 127 cofncide avec le canal 132, ce qui permet de ramener l'ensemble des canaux 126, 127 et 128 du distributeur à la pression de la pompe de transfert.
The pump which has just been described operates as follows:
  • The fuel intake occurs when one of the channels 114 coincides with the channel 133. The fuel introduced, the amount of which depends on the position of the adjusting member 134, pushes the pistons 108 radially outward. Simultaneously one of the channels 127 coincides with the channel 132, which makes it possible to bring all the channels 126, 127 and 128 of the distributor back to the pressure of the transfer pump.

A peu près au même moment, les rainures 130 assurent la liaison entre les canaux 115 et 125 ce qui équilibre libre les pressions dans les chambres 116 et 124 situées de part et d'autre de la navette 118. Sous l'action du ressort 123, la navette 118 est alors poussée jusqu'à ce que sa collerette 119, vienne en butée contre la surface 120.At about the same time, the grooves 130 provide the connection between the channels 115 and 125 which freely balances the pressures in the chambers 116 and 124 located on either side of the shuttle 118. Under the action of the spring 123 , the shuttle 118 is then pushed until its flange 119 comes into abutment against the surface 120.

Le refoulement du carburant est assuré par le rapprochement des pistons 108 sous l'action de la came 111. Ce refoulement se produit lorsque l'un des canaux 114 coïncide avec le canal 115 et que l'un des canaux 127 coïncide avec le canal 125, tandis que le canal 128 coïncide avec l'un des canaux 129 de départ vers un injecteur.The fuel is returned by bringing the pistons 108 together under the action of the cam 111. This delivery occurs when one of the channels 114 coincides with the channel 115 and one of the channels 127 coincides with the channel 125 , while the channel 128 coincides with one of the channels 129 from the start to an injector.

Le carburant refoulé par les pistons 108, dont la quantité a été déterminée, pendant l'admission, par l'organe de réglage 134, déplace la navette 118 qui, à son tour, refoule le carburant vers l'un des injecteurs.The fuel discharged by the pistons 108, the quantity of which has been determined, during admission, by the regulating member 134, displaces the shuttle 118 which, in turn, discharges the fuel towards one of the injectors.

Comme dans les exemples décrits aux Fig. 1 et 2, le contrôle des déplacements de la navette 118 par le capteur 121 permet de connaître avec une grande précision le début du refoulement et la quantité de carburant refoulée.As in the examples described in Figs. 1 and 2, the control of the movements of the shuttle 118 by the sensor 121 makes it possible to know with great precision the start of the delivery and the quantity of fuel delivered.

Claims (11)

1 - Dispositif de mesure du volume de carburant introduit dans un moteur thermique par au moins un injecteur à partir d'une pompe d'injection distributrice, du type comprenant une navette mobile dans un alésage situé dans le circuit d'alimentation en carburant du moteur et un capteur sensible aux déplacements de cette navette, caractérisé en ce que ledit alésage (24 ; 51 ; 117) contenant la navette (25 ; 52 ; 118) est disposé sur le trajet de refoulement entre la pompe (1,2,3 ; 40 ; 43 ; 101-106) et le/ou chaque injecteur,1 - Device for measuring the volume of fuel introduced into a heat engine by at least one injector from a distributor injection pump, of the type comprising a movable shuttle in a bore located in the fuel supply circuit of the engine and a sensor sensitive to the movements of this shuttle, characterized in that said bore (24; 51; 117) containing the shuttle (25; 52; 118) is disposed on the discharge path between the pump (1,2,3; 40; 43; 101-106) and / or each injector, 2 - Dispositif suivant la revendication 1, caractérisé en ce que ledit alésage (24 ; 51) est séparé par la navette (25 ; 52) en deux chambres, l'une (24- ; 51a) reliée au refoulement de la pompe d'injection et l'autre (24b; 51b) d'une part, à au moins un injecteur et, d'autre part, à une source de carburant.2 - Device according to claim 1, characterized in that said bore (24; 51) is separated by the shuttle (25; 52) into two chambers, one (24-; 51 a ) connected to the discharge of the pump d injection and the other (24 b ; 51 b ) on the one hand, at least one injector and, on the other hand, a fuel source. 3 - Dispositif suivant la revendication 2, caractérisé en ce que ladite chambre est reliée à la même source de carburant que la pompe d'injection.3 - Device according to claim 2, characterized in that said chamber is connected to the same fuel source as the injection pump. 4 - Dispositif suivant la revendication 2, caractérisé en ce que la navette (25 ; 52) est sollïcitée élastiquement vers sa position pour laquelle la première chambre (24- ; 51a) a un volume minimal.4 - Device according to claim 2, characterized in that the shuttle (25; 52) is urged elastically towards its position for which the first chamber (24-; 51 a ) has a minimum volume. 5 - Dispositif suivant l'une quelconque des revendications 1 à 4, caractérisé en ce que ledit alésage (24 ; 51) est disposé sur le trajet entre le refoulement (14) de la pompe d'injection et un distributeur (4, 5) commandant sélectivement l'alimentation de plusieurs injecteurs (31).5 - Device according to any one of claims 1 to 4, characterized in that said bore (24; 51) is disposed on the path between the discharge (14) of the injection pump and a distributor (4, 5) selectively controlling the supply of several injectors (31). 6 - Dispositif suivant la revendication 5, rattachée à la revendication 2, caractérisé en ce que ladite autre chambre (24b) est reliée à la source de carburant par l'intermédiaire du même distributeur (4, 5).6 - Device according to claim 5, attached to claim 2, characterized in that said other chamber (24 b ) is connected to the fuel source via the same distributor (4, 5). 7 - Dispositif suivant l'une quelconque des revendications 1 à 4, associé à une pompe d'injection du type comprenant un corps, un cylindre fixe délimitant une chambre de refoulement dans laquelle un piston formant simultanément distributeur se déplace, suivant un mouvement de rotation continue et suivant un mouvement axial alternatif, caractérisé en ce qu'il comprend une tête (44) rapportée sur le corps dans le prolongement du cylindre (41) et délimitant ledit alésage (51) recevant la navette (52), cet alésage communiquant directement à une extrémité avec la chambre de refoulement (47) et communiquant par son autre extrémité, sélectivement, avec la source de carburant et avec au moins un injecteur, par l'intermédiaire du distributeur que constitue le piston (43) de la pompe d'injection.7 - Device according to any one of claims 1 to 4, associated with an injection pump of the type comprising a body, a fixed cylinder defining a delivery chamber in which a piston simultaneously forming distributor moves, in a rotational movement continuous and in an alternating axial movement, characterized in that it comprises a head (44) attached to the body in the extension of the cylinder (41) and delimiting said bore (51) receiving the shuttle (52), this bore communicating directly at one end with the delivery chamber (47) and communicating by its other end, selectively, with the fuel source and with at least one injector, by means of the distributor constituted by the piston (43) of the injection. 8 - Dispositif suivant la revendication 1, caractérisé en ce que, la pompe d'injection étant du type comprenant un corps (101) délimitant un cylindre (103) dans lequel est monté rotatif-un rotor (104) comportant une partie pompe (105) formée par un alésage disposé radialement par rapport à l'axe du rotor et dans lequel sont reçus des pistons libres opposés situés au droit d'une came annulaire fixe, une partie distributeur (106), et un canal axial reliant les deux parties, le canal axial est interrompu et séparé en deux tronçons (113, 126) reliés respectivement l'une à la partie pompe (105) et l'autre à la partie distributeur (106), une série de canaux (114, 127) s'étendant à partir de chaque tronçon et débouchant à la périphérie du rotor pour coopérer avec deux canaux (115,125) ménagés dans le corps et reliés chacun à une extrémité respective de l'alésage (117) dans lequel est reçue la navette (118), l'agencement relatif des canaux (114,127) du rotor et des canaux (115, 125) ménagés dans le corps étant tel que lors de la rotation du rotor les deux tronçons (113, 126) sont périodiquement et simultanément mis en communication avec les extrémités de l'alésage (117) contenant la navette.8 - Device according to claim 1, characterized in that, the injection pump being of the type comprising a body (101) defining a cylinder (103) in which is rotatably mounted-a rotor (104) comprising a pump part (105 ) formed by a bore arranged radially with respect to the axis of the rotor and in which are received opposite free pistons situated in line with a fixed annular cam, a distributor part (106), and an axial channel connecting the two parts, the axial passage is interrupted and divided into two portions (113, 126) respectively connected to the pump part (1 05) and the other to the distributor part (106), a series of channels (114, 127) s extending from each section and opening at the periphery of the rotor to cooperate with two channels (115,125) formed in the body and each connected to a respective end of the bore (117) in which the shuttle (118) is received, the relative arrangement of the channels (114, 127) of the rotor and the channels (115, 125) provided in the body being such that during the rotation of the rotor the two sections (113, 126) are periodically and simultaneously placed in communication with the ends of the bore (117) containing the shuttle. 9 - Dispositif suivant la revendication 8, caractérisé en ce que lesdites séries de canaux (114 ; 127) sont reliées à une même source d'alimentation en carburant.9 - Device according to claim 8, characterized in that said series of channels (114; 127) are connected to the same fuel supply source. 10 - Dispositif suivant la revendication 8, caractérisé en ce que le nombre et la position angulaire des canaux (114, 127) desdites séries sont les mêmes.10 - Device according to claim 8, characterized in that the number and the angular position of the channels (114, 127) of said series are the same. 11 - Dispositif suivant la revendication 8, caractérisé en ce que les canaux (115, 125) ménagés dans le corps et reliés chacun à une extrémité de l'alésage (117) contenant la navette (118) sont reliés périodiquement entre eux par des rainures axiales (130) ménagées à la périphérie du rotor.11 - Device according to claim 8, characterized in that the channels (115, 125) formed in the body and each connected to one end of the bore (117) containing the shuttle (118) are periodically connected together by grooves axial (130) formed at the periphery of the rotor.
EP19810400339 1980-03-31 1981-03-05 Apparatus for metering an injected fuel quantity in a fuel-injection engine Expired EP0037296B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8007158A FR2479334B1 (en) 1980-03-31 1980-03-31 DEVICE FOR MEASURING THE VOLUME OF FUEL INJECTED INTO AN INJECTION-POWERED HEAT ENGINE
FR8007158 1980-03-31
FR8012401A FR2484024B2 (en) 1980-06-04 1980-06-04 DEVICE FOR MEASURING THE VOLUME OF FUEL INJECTED INTO AN INJECTION-POWERED HEAT ENGINE
FR8012401 1980-06-04

Publications (3)

Publication Number Publication Date
EP0037296A2 true EP0037296A2 (en) 1981-10-07
EP0037296A3 EP0037296A3 (en) 1981-11-11
EP0037296B1 EP0037296B1 (en) 1986-11-12

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EP19810400339 Expired EP0037296B1 (en) 1980-03-31 1981-03-05 Apparatus for metering an injected fuel quantity in a fuel-injection engine

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EP (1) EP0037296B1 (en)
DE (1) DE3175608D1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2585775A1 (en) * 1985-07-31 1987-02-06 Outboard Marine Corp FUEL PUMP / OIL, INTERNAL COMBUSTION ENGINE COMPRISING SUCH A PUMP AND DEVICE WITH SWITCH SENSITIVE TO OIL PRESSURE AND USEABLE IN SUCH A PUMP AND SUCH A MOTOR
EP0094640B1 (en) * 1982-05-14 1987-08-12 Hitachi, Ltd. Fuel pumping apparatus
DE19516686A1 (en) * 1995-05-06 1996-11-07 Keuning Aaltje Fuel injector
WO2006042789A1 (en) * 2004-10-19 2006-04-27 Robert Bosch Gmbh Measuring device for determining the delivered quantity of fuel in an injection valve

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FR1207501A (en) * 1958-06-23 1960-02-17 Improvements to reciprocating pumps with rotary flow distributor serving in particular as fuel injection pumps
FR1249615A (en) * 1960-02-25 1960-12-30 Cav Ltd Liquid fuel pump for internal combustion engines
FR1319872A (en) * 1962-04-17 1963-03-01 Cav Ltd Liquid fuel pump for internal combustion engine
CH369315A (en) * 1956-10-03 1963-05-15 Etienne Bessiere Pierre Internal combustion engine fuel injection pump
FR86373E (en) * 1963-09-25 1966-01-28 Method and device for injecting liquid fuel into an internal combustion engine
DE1253516B (en) * 1964-07-03 1967-11-02 Vyzk Ustav Prislusenstvi Motor Fuel injection device for multi-cylinder internal combustion engines
DE1919969A1 (en) * 1969-04-19 1970-11-12 Bosch Gmbh Robert Fuel injection pump for internal combustion engines
FR2228944A1 (en) * 1973-05-12 1974-12-06 Cav Ltd
FR2229867A1 (en) * 1973-05-15 1974-12-13 Cav Ltd
FR2282051A1 (en) * 1974-08-13 1976-03-12 Cav Ltd DISTRIBUTOR TYPE FUEL INJECTION PUMP
FR2336564A1 (en) * 1975-12-24 1977-07-22 Bosch Gmbh Robert FUEL INJECTOR FOR INTERNAL COMBUSTION ENGINES
FR2349039A1 (en) * 1976-04-23 1977-11-18 Kloeckner Humboldt Deutz Ag FUEL INJECTION SYSTEM
GB2017205A (en) * 1978-03-22 1979-10-03 Lucas Industries Ltd Fuel Pumping Apparatus

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH369315A (en) * 1956-10-03 1963-05-15 Etienne Bessiere Pierre Internal combustion engine fuel injection pump
FR1206849A (en) * 1958-05-19 1960-02-11 Improvements to self-regulating piston pumps, in particular for fuel injection into engines
FR1207501A (en) * 1958-06-23 1960-02-17 Improvements to reciprocating pumps with rotary flow distributor serving in particular as fuel injection pumps
FR1249615A (en) * 1960-02-25 1960-12-30 Cav Ltd Liquid fuel pump for internal combustion engines
FR1319872A (en) * 1962-04-17 1963-03-01 Cav Ltd Liquid fuel pump for internal combustion engine
FR86373E (en) * 1963-09-25 1966-01-28 Method and device for injecting liquid fuel into an internal combustion engine
DE1253516B (en) * 1964-07-03 1967-11-02 Vyzk Ustav Prislusenstvi Motor Fuel injection device for multi-cylinder internal combustion engines
DE1919969A1 (en) * 1969-04-19 1970-11-12 Bosch Gmbh Robert Fuel injection pump for internal combustion engines
FR2228944A1 (en) * 1973-05-12 1974-12-06 Cav Ltd
FR2229867A1 (en) * 1973-05-15 1974-12-13 Cav Ltd
FR2282051A1 (en) * 1974-08-13 1976-03-12 Cav Ltd DISTRIBUTOR TYPE FUEL INJECTION PUMP
FR2336564A1 (en) * 1975-12-24 1977-07-22 Bosch Gmbh Robert FUEL INJECTOR FOR INTERNAL COMBUSTION ENGINES
FR2349039A1 (en) * 1976-04-23 1977-11-18 Kloeckner Humboldt Deutz Ag FUEL INJECTION SYSTEM
GB2017205A (en) * 1978-03-22 1979-10-03 Lucas Industries Ltd Fuel Pumping Apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0094640B1 (en) * 1982-05-14 1987-08-12 Hitachi, Ltd. Fuel pumping apparatus
FR2585775A1 (en) * 1985-07-31 1987-02-06 Outboard Marine Corp FUEL PUMP / OIL, INTERNAL COMBUSTION ENGINE COMPRISING SUCH A PUMP AND DEVICE WITH SWITCH SENSITIVE TO OIL PRESSURE AND USEABLE IN SUCH A PUMP AND SUCH A MOTOR
GB2178800A (en) * 1985-07-31 1987-02-18 Outboard Marine Corp Fuel/oil pump
US4690108A (en) * 1985-07-31 1987-09-01 Debevec Anthony F Fuel/oil pump
GB2178800B (en) * 1985-07-31 1989-08-16 Outboard Marine Corp Fuel/oil pump
DE19516686A1 (en) * 1995-05-06 1996-11-07 Keuning Aaltje Fuel injector
WO2006042789A1 (en) * 2004-10-19 2006-04-27 Robert Bosch Gmbh Measuring device for determining the delivered quantity of fuel in an injection valve

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EP0037296A3 (en) 1981-11-11
EP0037296B1 (en) 1986-11-12
DE3175608D1 (en) 1987-01-02

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