FR2887288A1 - Gas/fuel mixture inlet system cleaning device for motor vehicle, has tongue fixed on inner wall of inlet conduit at level of junction of surfaces of rod and valve so as to project towards center of conduit at level of flared part - Google Patents
Gas/fuel mixture inlet system cleaning device for motor vehicle, has tongue fixed on inner wall of inlet conduit at level of junction of surfaces of rod and valve so as to project towards center of conduit at level of flared part Download PDFInfo
- Publication number
- FR2887288A1 FR2887288A1 FR0551652A FR0551652A FR2887288A1 FR 2887288 A1 FR2887288 A1 FR 2887288A1 FR 0551652 A FR0551652 A FR 0551652A FR 0551652 A FR0551652 A FR 0551652A FR 2887288 A1 FR2887288 A1 FR 2887288A1
- Authority
- FR
- France
- Prior art keywords
- valve
- level
- conduit
- tongue
- rod
- 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.)
- Withdrawn
Links
- 238000004140 cleaning Methods 0.000 title claims description 6
- 239000000203 mixture Substances 0.000 title description 6
- 239000000446 fuel Substances 0.000 title description 4
- 238000002485 combustion reaction Methods 0.000 claims description 10
- 230000000295 complement effect Effects 0.000 claims description 4
- 238000005255 carburizing Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- F02M29/00—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture
- F02M29/04—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture having screens, gratings, baffles or the like
- F02M29/06—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture having screens, gratings, baffles or the like generating whirling motion of mixture
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B31/00—Modifying induction systems for imparting a rotation to the charge in the cylinder
- F02B31/04—Modifying induction systems for imparting a rotation to the charge in the cylinder by means within the induction channel, e.g. deflectors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lift Valve (AREA)
Abstract
Description
DISPOSITIF DE NETTOYAGE AUTOMATIQUEAUTOMATIC CLEANING DEVICE
D'UN SYSTEME D'ADMISSIONOF AN ADMISSION SYSTEM
DE MOTEUR A COMBUSTION INTERNEINTERNAL COMBUSTION ENGINE
DESCRIPTION DOMAINE DE L'INVENTIONDESCRIPTION FIELD OF THE INVENTION
L'invention ressortit du domaine des moteurs à combustion interne tels que ceux utilisés pour les véhicules automobiles, et en particulier, du système d'admission du mélange gaz/carburant au niveau des soupapes d'admission. The invention lies in the field of internal combustion engines such as those used for motor vehicles, and in particular, the admission system of the gas / fuel mixture at the intake valves.
ART ANTERIEUR ET PROBLEME POSEPRIOR ART AND PROBLEM POSE
Dans les moteurs à combustion interne fonctionnant avec de l'essence ou du gazole comme carburant, le mélange air/carburant pénètre dans la chambre de combustion par un conduit d'admission, l'entrée du mélange étant commandée par une soupape dite d'admission qui obture et ouvre alternativement le passage au mélange. Pour ce faire, la sortie du conduite d'admission possède une petite surface inclinée, tel qu'un chanfrein, appelé siège de soupape et sur lequel la soupape d'admission vient prendre appui pour obturer ainsi le passage au mélange. In internal combustion engines operating with gasoline or diesel as fuel, the air / fuel mixture enters the combustion chamber through an intake duct, the inlet of the mixture being controlled by a so-called admission valve which closes and alternately opens the passage to the mixture. To do this, the outlet of the intake pipe has a small inclined surface, such as a chamfer, called valve seat and on which the intake valve bears to thereby close the passage to the mixture.
Or, des phénomènes de recirculation de gaz d'échappement (exhaust gaz recirculation, en langue anglaise, soit EGR) se produisent fréquemment et sont de plus en plus importants. Ils créent un encrassement des soupapes d'admission, notamment sur la surface évasée des soupapes. En effet, ces gaz sont très chargés en particules et en imbrûlés. De tels résidus se collent sur les parties évasées en tulipe des soupapes et obstruent partiellement les conduits d'admission, ayant pour conséquence de dégrader la perméabilité des conduits d'admission. However, exhaust gas recirculation phenomena (EGR) occur frequently and are increasingly important. They create a clogging of the intake valves, especially on the flared surface of the valves. Indeed, these gases are very charged with particles and unburnt. Such residues stick to the tulip-flared portions of the valves and partially obstruct the intake ducts, resulting in degrading the permeability of the intake ducts.
Le but de l'invention est de remédier à cet inconvénient en proposant de nettoyer de façon automatique cet endroit sans modifier les éléments existants du dispositif d'admission utilisé à ce jour. The object of the invention is to overcome this disadvantage by proposing to automatically clean this place without modifying the existing elements of the admission device used to date.
D'autre part, la demande de brevet anglaise GB 2 381 293 décrit un système de soupape d'admission qui est équipé d'un dispositif d'orientation des gaz d'admission au niveau de la soupape d'admission. Celui-ci est constitué d'un manchon placé dans la culasse, de façon coaxiale autour de la soupape d'admission et supportant une ailette et dont la forme de l'arête placée en regard de la surface concave de la soupape d'admission correspond à celle-ci de façon complémentaire, mais n'est pas destinée à être en contact avec elle. On note que la soupape d'admission est guidée en rotation dans ses mouvements. On the other hand, British Patent Application GB 2 381 293 discloses an intake valve system which is equipped with an intake gas guidance device at the intake valve. This consists of a sleeve placed in the cylinder head, coaxially around the intake valve and supporting a fin and whose shape of the edge placed opposite the concave surface of the intake valve corresponds to it in a complementary way, but is not intended to be in contact with it. Note that the intake valve is guided in rotation in its movements.
RESUME DE L'INVENTION L'objet principal de l'invention est donc un dispositif de nettoyage automatique d'un système d'admission de moteur à combustion interne, le moteur comprenant au moins un conduit d'admission de gaz de carburation définissant un axe de sortie longitudinal et dans lequel est placée une soupape d'admission montée mobile en translation longitudinale selon l'axe de sortie du conduit d'admission et libre en rotation autour de cet axe de sortie et comprenant une tige et une partie évasée. SUMMARY OF THE INVENTION The main object of the invention is therefore an automatic cleaning device for an internal combustion engine intake system, the engine comprising at least one carburizing gas inlet duct defining an axis. longitudinal outlet and in which is placed an inlet valve mounted movably in longitudinal translation along the outlet axis of the intake duct and free to rotate about this output axis and comprising a rod and a flared portion.
Selon l'invention, il comprend une languette fixée sensiblement perpendiculairement à une paroi interne du conduit d'admission de manière à faire saillie vers le centre du conduit d'amission au niveau de la partie évasée et du début de la tige qui lui est adjacente et dont la forme d'une l'arrête distale est complémentaire à celle de la soupape à cet endroit de façon à affleurer la surface de la tige sur toute cette partie. Ainsi, la rotation naturelle de la soupape d'admission conjuguée au contact de la languette permet un nettoyage permanent de la surface évasée de la soupape. According to the invention, it comprises a tongue fixed substantially perpendicular to an internal wall of the intake duct so as to protrude towards the center of the discharge duct at the flared portion and the beginning of the rod which is adjacent to it. and whose shape of a distal stop is complementary to that of the valve at this point so as to be flush with the surface of the rod over all this part. Thus, the natural rotation of the intake valve combined with the contact of the tongue allows a permanent cleaning of the flared surface of the valve.
Dans sa réalisation préférentielle, la languette est métallique. In its preferred embodiment, the tongue is metallic.
De plus, il est avantageux que la languette soit très fine. In addition, it is advantageous that the tongue is very thin.
LISTE DES FIGURESLIST OF FIGURES
L'invention et ses différentes caractéristiques techniques seront mieux comprises à la lecture de la description suivante, accompagnée de deux figures représentant respectivement: - figure 1, en coupe frontale, le dispositif selon l'invention, et - figure 2, en coupe perpendiculaire à la première, le dispositif selon l'invention. The invention and its various technical characteristics will be better understood on reading the following description, accompanied by two figures respectively representing: FIG. 1, in frontal section, the device according to the invention, and FIG. 2, in section perpendicular to FIG. the first, the device according to the invention.
DESCRIPTION DETAILEE D'UNE REALISATION DE DETAILED DESCRIPTION OF AN EMBODIMENT
L'INVENTION La figure 1, est donc une coupe partielle de la culasse d'un moteur à combustion interne, au niveau de la sortie d'un conduit d'admission 1, débouchant dans la chambre de combustion 4 d'un cylindre du moteur. THE INVENTION FIG. 1 is therefore a partial section of the cylinder head of an internal combustion engine, at the outlet of an intake duct 1, opening into the combustion chamber 4 of an engine cylinder. .
Une soupape d'admission 5 est montée coulissante dans la culasse, par l'intermédiaire de sa tige 6, selon un axe de coulissement 2 placée dans l'axe de la sortie du conduit d'admission 1. La tête 7 de la soupape 5 est logée dans le conduit d'admission 1, au niveau de sa sortie dans la chambre de combustion 4, plus exactement, au niveau d'un siège de soupape 13 destiné à recevoir la partie périphérique de la surface évasée 8 de la forme évasée 7 de la soupape 5, lors de chaque aller et retour de cette dernière. An intake valve 5 is slidably mounted in the cylinder head, via its rod 6, along a sliding axis 2 placed in the axis of the outlet of the intake duct 1. The head 7 of the valve 5 is housed in the intake duct 1, at its outlet in the combustion chamber 4, more exactly, at a valve seat 13 intended to receive the peripheral portion of the flared surface 8 of the flared shape 7 of the valve 5, during each return trip of the latter.
L'élément opérationnel du dispositif selon l'invention est constitué par une languette 10 fixée sur la paroi interne 3 du conduit d'amission 1, au niveau de la jonction de la surface 9 de la tige 6 et de la surface évasée 8 de la soupape 5. Cette languette est positionnée de façon à faire saillie vers le centre du conduit d'admission 1, sensiblement perpendiculairement à la paroi 3 du conduit d'admission 1. La forme de cette languette est trapézoïdale, le plus grand 14 des côtés parallèles étant placé contre la paroi interne 3 du conduit d'admission 1, le plus petit 12 des côtés parallèles affleurant et étant parallèle à la surface 9 de la tige 6 de la soupape 5 et le côté oblique 11 affleurant et étant parallèle à la surface évasée 8 de la soupape 5. Si la jonction de la surface 9 de la tige 6 avec la surface évasée 8 de la soupape 5 est constituée d'un arrondi, la jonction du plus petit 12 des côtés parallèles avec le côté oblique 11 de la languette 10 doit être également constituée d'un arrondi de forme complémentaire à celui de la soupape 5. The operational element of the device according to the invention consists of a tongue 10 fixed on the inner wall 3 of the amission pipe 1, at the junction of the surface 9 of the rod 6 and the flared surface 8 of the valve 5. This tongue is positioned to protrude towards the center of the intake duct 1, substantially perpendicular to the wall 3 of the intake duct 1. The shape of this tongue is trapezoidal, the largest 14 of the parallel sides being placed against the inner wall 3 of the intake duct 1, the smallest 12 parallel sides flush and being parallel to the surface 9 of the rod 6 of the valve 5 and the oblique side 11 flush and being parallel to the flared surface 8 of the valve 5. If the junction of the surface 9 of the rod 6 with the flared surface 8 of the valve 5 consists of a rounded, the junction of the smaller 12 parallel sides with the oblique side 11 of the tongue this must also be constituted by a rounding of complementary shape to that of the valve 5.
La languette 10, qui a donc une fonction de raclage, est fixée au conduit d'admission 1 par un simple soudage. En effet, le débattement de la soupape 5 étant très limité, il n'est pas nécessaire d'utiliser un procédé de fixation particulier, notamment vis-à-vis de la tenue mécanique. Son positionnement dans le conduit d'admission 1 est effectué de sorte que son côté oblique 11 puisse être suffisamment près de la surface évasée 8 de la partie évasée 7 de la soupape 5, afin de prévenir d'un encrassement important par amas de particules se suies. Sa forme doit donc épouser celle de la soupape 5, notamment au niveau de la partie évasée 7, pour que le nettoyage soit efficace sur toute cette surface. The tongue 10, which therefore has a scraping function, is fixed to the intake duct 1 by a simple welding. Indeed, the deflection of the valve 5 is very limited, it is not necessary to use a particular fixing method, especially with respect to the mechanical strength. Its positioning in the intake duct 1 is carried out so that its oblique side 11 can be sufficiently close to the flared surface 8 of the flared portion 7 of the valve 5, in order to prevent significant fouling by clusters of particles. soot. Its shape must match that of the valve 5, especially at the flared portion 7, for the cleaning is effective on all this surface.
La figure 2 est une vue selon un plan perpendiculaire à celui de la figure 1 et permet de constater que la languette 10 est fine, aussi fine que possible, dans les mesures permises par la résistance des matériaux pour qu'elle soit rigide, qu'elle ait une bonne tenue thermique et qu'elle résiste bien à la dégradation de la perméabilité. En effet, son épaisseur doit avoir le moins d'influence possible sur le remplissage de la chambre de combustion 4. FIG. 2 is a view along a plane perpendicular to that of FIG. 1 and shows that the tongue 10 is thin, as fine as possible, in the measurements permitted by the resistance of the materials so that it is rigid, that it has a good thermal resistance and that it resists well to the degradation of the permeability. Indeed, its thickness must have the least possible influence on the filling of the combustion chamber 4.
Compte tenu du fait que la soupape est animée d'un mouvement naturel de rotation autour de l'axe de coulissement 2 et que les côtés 11 et 12 de la languette 10 tangents avec les surfaces 8 et 9 de la soupape affleurent ceux-ci, la languette constitue ainsi un racleur de la surface évasée 8 et notamment des parties opérationnelles de la soupape soumises aux gaz de recirculation. On évite ainsi la formation de dépôts pouvant, à terme, fortement dégrader le remplissage du moteur. In view of the fact that the valve is driven in a natural rotational movement around the sliding axis 2 and that the sides 11 and 12 of the tongue tangent with the surfaces 8 and 9 of the valve are flush with them, the tongue thus constitutes a scraper of the flared surface 8 and in particular operating parts of the valve subjected to the recirculation gases. This avoids the formation of deposits that may, in the long term, greatly degrade the filling of the engine.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0551652A FR2887288A1 (en) | 2005-06-16 | 2005-06-16 | Gas/fuel mixture inlet system cleaning device for motor vehicle, has tongue fixed on inner wall of inlet conduit at level of junction of surfaces of rod and valve so as to project towards center of conduit at level of flared part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0551652A FR2887288A1 (en) | 2005-06-16 | 2005-06-16 | Gas/fuel mixture inlet system cleaning device for motor vehicle, has tongue fixed on inner wall of inlet conduit at level of junction of surfaces of rod and valve so as to project towards center of conduit at level of flared part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2887288A1 true FR2887288A1 (en) | 2006-12-22 |
Family
ID=36118240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0551652A Withdrawn FR2887288A1 (en) | 2005-06-16 | 2005-06-16 | Gas/fuel mixture inlet system cleaning device for motor vehicle, has tongue fixed on inner wall of inlet conduit at level of junction of surfaces of rod and valve so as to project towards center of conduit at level of flared part |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2887288A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1214045B (en) * | 1959-09-09 | 1966-04-07 | Maschf Augsburg Nuernberg Ag | Supercharged, self-igniting four-stroke internal combustion engine |
| GB1274822A (en) * | 1970-02-09 | 1972-05-17 | Nissan Motor | Device to improve combustion efficiency in an internal combustion engine |
| SU1337535A1 (en) * | 1986-01-02 | 1987-09-15 | МВТУ им.Н.Э.Баумана | Internal combustion engine cylinder head |
| EP0281015A2 (en) * | 1987-02-26 | 1988-09-07 | Motoren-Werke Mannheim Aktiengesellschaft | Sickle-shaped swirl-inducing device for the inlet conduit of an internal-combustion engine |
| US6173695B1 (en) * | 1999-04-06 | 2001-01-16 | Gregory G. Davis | Cylinder head with high swirl intake port and combustion chamber |
-
2005
- 2005-06-16 FR FR0551652A patent/FR2887288A1/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1214045B (en) * | 1959-09-09 | 1966-04-07 | Maschf Augsburg Nuernberg Ag | Supercharged, self-igniting four-stroke internal combustion engine |
| GB1274822A (en) * | 1970-02-09 | 1972-05-17 | Nissan Motor | Device to improve combustion efficiency in an internal combustion engine |
| SU1337535A1 (en) * | 1986-01-02 | 1987-09-15 | МВТУ им.Н.Э.Баумана | Internal combustion engine cylinder head |
| EP0281015A2 (en) * | 1987-02-26 | 1988-09-07 | Motoren-Werke Mannheim Aktiengesellschaft | Sickle-shaped swirl-inducing device for the inlet conduit of an internal-combustion engine |
| US6173695B1 (en) * | 1999-04-06 | 2001-01-16 | Gregory G. Davis | Cylinder head with high swirl intake port and combustion chamber |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |
Effective date: 20070228 |