FR2756870A3 - Improved fuel injection pump for internal combustion engines - Google Patents
Improved fuel injection pump for internal combustion engines Download PDFInfo
- Publication number
- FR2756870A3 FR2756870A3 FR9615132A FR9615132A FR2756870A3 FR 2756870 A3 FR2756870 A3 FR 2756870A3 FR 9615132 A FR9615132 A FR 9615132A FR 9615132 A FR9615132 A FR 9615132A FR 2756870 A3 FR2756870 A3 FR 2756870A3
- Authority
- FR
- France
- Prior art keywords
- solenoid valve
- fuel
- rotor
- injection
- pistons
- 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
Links
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
- F02M41/08—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
- F02M41/14—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 rotary distributor supporting pump pistons
- F02M41/1405—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 rotary distributor supporting pump pistons pistons being disposed radially with respect to rotation axis
- F02M41/1411—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 rotary distributor supporting pump pistons pistons being disposed radially with respect to rotation axis characterised by means for varying fuel delivery or injection timing
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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
Description
La présente invention concerne des pompes d'injection de combustible pour les moteurs à combustion interne. The present invention relates to fuel injection pumps for internal combustion engines.
On connaît des pompes d'injection composées d'un rotor et d'une tête distributrice. Ledit rotor est percé d'un ou plusieurs alésages transversaux dans lesquels coulissent des pistons libres dont le mouvement centripète est commandé par un profil de came par l'intermédiaire de galets et porte galets eux-mêmes coulissant dans des logements ménagés à cet effet dans ledit rotor. Injection pumps are known which consist of a rotor and a distributor head. Said rotor is pierced with one or more transverse bores in which free pistons slide, the centripetal movement of which is controlled by a cam profile by means of rollers and roller rollers themselves sliding in housings provided for this purpose in said rotor.
L'espace entre les pistons est relié par un canal central d'une part à des conduits d'admission et d'autre part à un conduit de refoulement qui est amené successivement au cours de la rotation du rotor, en regard des sorties ménagées dans la tête distributrice et communiquant chacune avec un injecteur du moteur. The space between the pistons is connected by a central channel on the one hand to intake ducts and on the other hand to a discharge duct which is brought successively during the rotation of the rotor, opposite the outlets provided in the distributor head and each communicating with an engine injector.
La quantité de combustible introduite dans le rotor, donc injectée dans le moteur est contrôlée par une butée radiale qui limite la course centrifuge des pistons et par un étranglement variable commandé par un régulateur extérieur qui peut être mécanique, hydraulique ou de toute autre nature. The amount of fuel introduced into the rotor, therefore injected into the engine is controlled by a radial stop which limits the centrifugal stroke of the pistons and by a variable throttle controlled by an external regulator which can be mechanical, hydraulic or of any other nature.
On connaît par ailleurs des électrovannes utilisées sur d'autres systèmes d'injection de combustible et dont le but est de fermer et ouvrir la communication entre la canalisation haute pression de ces systèmes d'injection et des zones de décharge où règne une pression plus faible, ladite électrovanne étant commandée par un calculateur qui peut prendre en compte autant de paramètres que voulu. Solenoid valves are also known which are used on other fuel injection systems and whose purpose is to close and open the communication between the high pressure pipe of these injection systems and the discharge zones where a lower pressure prevails. , said solenoid valve being controlled by a computer which can take into account as many parameters as desired.
La présente invention a pour objet la combinaison des deux systèmes précédemment décrits afin de réaliser un nouveau système d'injection de combustible qui sera extrêmement simplifié par rapport aux systèmes existants tout en en conservant les qualités et qui pourra être produit en grande partie sur les moyens industriels existants donc à coût réduit. The subject of the present invention is the combination of the two systems described above in order to produce a new fuel injection system which will be extremely simplified compared to existing systems while retaining the qualities thereof and which may be produced largely on the means existing manufacturers therefore at reduced cost.
L'invention sera bien comprise à la lecture de la description suivante faite en se référant aux schémas ci-joints. The invention will be clearly understood on reading the following description made with reference to the attached diagrams.
Dans le fonctionnement connu le remplissage du combustible entre les pistons (1 ) se fait comme indiqué sur la figure 2, l'orifice de refoulement étant fermé comme indiqué sur la figure 3 et l'étranglement variable limitant éventuellement la course centrifuge des pistons. In known operation, the filling of the fuel between the pistons (1) is done as indicated in FIG. 2, the delivery orifice being closed as indicated in FIG. 3 and the variable throttle possibly limiting the centrifugal stroke of the pistons.
A la phase suivante lorsque le rotor C5) a tourné dans la tête
distributrice(57 comme indiqué sur la figure 4 le profil de la came impose
un mouvement centripète aux galets 3 et porte galets )forçant les pistons
à se rapprocher provoquant l'évacuation du combustible par l'orifice de
refoulement ) comme indiqué sur la figure 5 alors que les orifices d'admission Qsont fermés comme indiqué sur la figure 4.In the next phase when the rotor C5) has turned in the head
distributor (57 as shown in Figure 4 the profile of the cam imposes
a centripetal movement with the rollers 3 and roller support) forcing the pistons
to get closer causing the fuel to evacuate through the orifice
delivery) as shown in Figure 5 while the intake ports Q are closed as shown in Figure 4.
Dans cette invention, on supprime l'étranglement variable G et on
ajoute l'orifice 11 dans la tâte distributrice et on met cet orifice en
communication avec la gorge annulaire (i) de l'électrovanne G comme
indiqué sur la figure 6 . Dans ces conditions, le remplissage du volume entre
les positions se fait comme précédemment sans limitation.In this invention, we remove the variable constriction G and we
add the orifice 11 in the distributor head and we put this orifice in
communication with the annular groove (i) of the solenoid valve G as
shown in Figure 6. Under these conditions, the filling of the volume between
the positions are done as before without limitation.
Pendant la phase de refoulement , lorsque l'électrovanne (i) est
ouverte, le refoulement du combustible se fait vers la basse pression comme
indiqué sur la figure 6 parce que l'injecteur qui est en communication avec
l'orifice de refoulement, (ss) (figure 5 ) ne s'ouvre que pour une pression
élevée. Par contre lorsque I' électrovanne est fermée (voir figure 6 ), le
refoulement ne peut se faire que vers l'injecteur par l'orifice ) . On voit donc
clairement que le début d'injection est provoqué par la fermeture de
l'électrovanne (i) tandis que la fin de l'injection est provoquée par l'ouverture
de la dite électrovanne. On comprend bien qu'avec ce dispositif on peut
déplacer l'injection dans le temps comme on le veut en déplaçant la fermeture
de l'électrovanne, et on peut contrôler la quantité de combustible injectée en
contrôlant la durée de fermeture de l'électrovanne. During the discharge phase, when the solenoid valve (i) is
open, the fuel is discharged towards the low pressure as
indicated in Figure 6 because the injector which is in communication with
the discharge opening, (ss) (figure 5) opens only for a pressure
high. On the other hand, when the solenoid valve is closed (see FIG. 6), the
delivery can only be made to the injector through the orifice). So we see
clearly that the start of injection is caused by the closure of
the solenoid valve (i) while the end of the injection is caused by the opening
of the said solenoid valve. We understand that with this device we can
move the injection in time as desired by moving the closure
of the solenoid valve, and you can control the amount of fuel injected by
controlling the closing time of the solenoid valve.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9615132A FR2756870B3 (en) | 1996-12-10 | 1996-12-10 | IMPROVEMENT IN FUEL INJECTION PUMPS FOR INTERNAL COMBUSTION ENGINES |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9615132A FR2756870B3 (en) | 1996-12-10 | 1996-12-10 | IMPROVEMENT IN FUEL INJECTION PUMPS FOR INTERNAL COMBUSTION ENGINES |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2756870A3 true FR2756870A3 (en) | 1998-06-12 |
FR2756870B3 FR2756870B3 (en) | 1998-11-06 |
Family
ID=9498497
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9615132A Expired - Fee Related FR2756870B3 (en) | 1996-12-10 | 1996-12-10 | IMPROVEMENT IN FUEL INJECTION PUMPS FOR INTERNAL COMBUSTION ENGINES |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2756870B3 (en) |
-
1996
- 1996-12-10 FR FR9615132A patent/FR2756870B3/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FR2756870B3 (en) | 1998-11-06 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |