EP2024617A1 - Cylinder housing cooling structure - Google Patents

Cylinder housing cooling structure

Info

Publication number
EP2024617A1
EP2024617A1 EP07766001A EP07766001A EP2024617A1 EP 2024617 A1 EP2024617 A1 EP 2024617A1 EP 07766001 A EP07766001 A EP 07766001A EP 07766001 A EP07766001 A EP 07766001A EP 2024617 A1 EP2024617 A1 EP 2024617A1
Authority
EP
European Patent Office
Prior art keywords
cylinder block
cylinder
orifices
water chamber
main
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
EP07766001A
Other languages
German (de)
French (fr)
Other versions
EP2024617B1 (en
Inventor
Emmanuel Deruyter
Steeve Fontaine
Robert Kunsch
Patrick Orval
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.)
Renault SAS
Original Assignee
Renault SAS
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
Application filed by Renault SAS filed Critical Renault SAS
Publication of EP2024617A1 publication Critical patent/EP2024617A1/en
Application granted granted Critical
Publication of EP2024617B1 publication Critical patent/EP2024617B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/02—Cylinders; Cylinder heads  having cooling means
    • F02F1/10—Cylinders; Cylinder heads  having cooling means for liquid cooling
    • F02F1/108—Siamese-type cylinders, i.e. cylinders cast together
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/02—Cylinders; Cylinder heads  having cooling means
    • F02F1/10—Cylinders; Cylinder heads  having cooling means for liquid cooling
    • F02F1/14—Cylinders with means for directing, guiding or distributing liquid stream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/02—Arrangements for cooling cylinders or cylinder heads
    • F01P2003/028—Cooling cylinders and cylinder heads in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/02—Cylinders; Cylinder heads  having cooling means
    • F02F1/10—Cylinders; Cylinder heads  having cooling means for liquid cooling
    • F02F2001/106—Cylinders; Cylinder heads  having cooling means for liquid cooling using a closed deck, i.e. the water jacket is not open at the block top face

Definitions

  • the present invention relates to the cooling of internal combustion engines.
  • the invention relates to a structure of a cylinder block for the circulation of a coolant in the engine.
  • the cylinder block contains the combustion chambers of the engine, and has cavities, called water chambers, in which circulates a cooling fluid.
  • the cooling circuits, and in particular the structure of the water chambers, are designed to avoid hot spots in the engine, and to obtain a good distribution of temperatures between each combustion chamber.
  • the publication FR 2 858 357 proposes an engine cooling structure in which the cooling liquid circulates parallel to the axis of the cylinders.
  • a feed passage in the housing delivers the liquid into a first water chamber on one side of the cylinders.
  • the coolant then passes through a water chamber in the cylinder head, and finally goes into a second water chamber on the other side of the cylinders.
  • the distribution of the fluid on each combustion station is carried out in the feed passage, by dimensioning the diameter of the bore of the passage.
  • such a structure does not guarantee circulation parallel to the cylinder axis, and its implementation remains complex and expensive to implement.
  • the object of the invention is to provide a cooling structure of an improved cylinder block, of simple design, and allowing a balanced distribution of the coolant flow parallel to each cylinder.
  • the invention proposes a structure of a cylinder block of an internal combustion engine, whose first water chamber comprises an upper part intended for the circulation of the fluid along each cylinder towards the part upper part of the cylinder block, and a lower part allowing a longitudinal circulation of the fluid in the lower part of the cylinder block, the two parts being connected to one another by orifices. the main distribution of fluid from the bottom to the top.
  • the main orifices may be located at each cylinder drum to distribute the coolant on each cylinder.
  • the section of the main ports may vary depending on the distance of these orifices relative to the supply passage. In particular, the section of the main orifices may decrease with the distance of the orifices relative to the feed passage.
  • the first water chamber of the cylinder block may comprise secondary orifices connecting the upper part and the lower part of the first water chamber, and for straightening the flow of liquid from the main orifices within the upper part. Secondary ports may be located at each cylinder interference.
  • the lower part of the first water chamber may have material passages, located at the level of the interferences, and in the axis of the clamping screws of the cylinder head to allow the transmission of the tightening forces of the screws to the lower structure of the cylinder head. cylinder block.
  • the second water chamber of the cylinder block may comprise, as in the first water chamber, an upper part and a lower part, the two parts being connected to one another by orifices, being at the level of each cylinder barrel, and whose section may vary depending on the distance of the orifices relative to the outlet passage.
  • the lower part of the second water chamber may have material passages, located at the level of the interferences, and in the axis of the tightening bolts of the cylinder head to allow the transmission of tightening forces of the screws to the lower structure of the cylinder head. cylinder block.
  • FIG. 1 is a perspective diagram of the cylinder block according to a first embodiment of the invention
  • - Figure 2 is a top view of the cylinder block of Figure 1
  • - Figure 3 is a horizontal sectional view at the main openings of the cylinder block of Figure 1;
  • - Figure 4 is a horizontal sectional view at the material passages of the distributor of the cylinder block of Figure 1;
  • - Figure 5 is a vertical sectional view perpendicular to the line of the cylinders, at the material passages of the distributor of the cylinder block of Figure 1;
  • FIG. 6 is a perspective diagram of the cylinder block according to a second embodiment of the invention
  • - Figure 7 is a horizontal sectional view at the secondary orifices of the cylinder block of Figure 6;
  • FIG. 8 is a vertical sectional view perpendicular to the line of the cylinders, at the material passages of the distributor of the cylinder block of Figure 6;
  • - Figure 9 is a perspective diagram of the cylinder block according to another embodiment of the invention.
  • an internal combustion engine comprises a cylinder block 10 and a cylinder head (not shown) attached to the cylinder block 10.
  • the cylinder block 10 and the cylinder head are, generally, castings made of steel, cast iron or aluminum.
  • the cylinder block 10 has four cylinder drums 14 arranged in line in the length of the cylinder block 10. These cylinder drums 14 form the combustion chambers of the engine, in which the pistons are placed.
  • the cylinder block 10 also comprises a feed passage 16, water chambers 24 and 32, and an outlet passage 18, for the circulation of a coolant in the engine.
  • the feed passage 16 is located at one end of the crankcase 10. In this example the feed passage 16 is located in the width of the side of the front face 2 of the crankcase 10. The entrance of this passage of power supply 16 is connected to a pump. The feed passage 16 opens on the lower portion 22 of a first water chamber 24, forming a bend with the latter. This lower part 22 is called tundish 22.
  • the distributor 22 is located in the lower part of the cylinder housing 10, and extends over the entire length of the housing 10, by wrapping the lateral sides with respect to the line of the cylinders 14, the lower part of the walls of the barrels 14.
  • the distributor 22 has material passages 44 located in the axis of the bores 46 for fixing the tightening screws of the cylinder head, and in the planes passing at the level of the interferences 42 perpendicular to the line of the cylinders 14. These passages of material 44 allow the transmission of clamping forces of the bolts of the cylinder head to the low structure of the crankcase 10.
  • the bores 48 for fixing the bearing caps to the lower part of the crankcase 10 are in the axis of the material passages 44 and bores 46 for fixing the tightening screws of the cylinder head. In this way, the clamping forces of the cylinder head and bearing caps, are opposed in the cylinder block 10.
  • the upper part 26 of the first water chamber 24 is intended for the circulation of cooling liquid along the walls of the drums 14, and parallel to the axis of the cylinders.
  • the upper part 26 of the first water chamber 24 is called the water rising chamber.
  • This water rising chamber 26 extends over the entire length of the housing 10 above the distributor 22, and envelops the lateral sides with respect to the line of the cylinders 14, the upper part of the walls of the barrels 14.
  • the part upper 26 of the first water chamber 24 of the cylinder block 10 communicates with the distributor 22 through the main ports 28.
  • the main ports 28 are located at each barrel 14.
  • the section of the main ports 28 is calibrated to obtain a homogeneous distribution of the coolant flow on each cylinder 14.
  • the first water chamber 24 opens on the upper face 4 of the cylinder block 10 through outlet orifices 30.
  • a second water chamber 32 of the cylinder housing surrounds the lateral sides with respect to the line of the cylinders 14, the walls of the barrels 14 opposite the first water chamber. This second chamber 32 extends over the entire length of the cylinder block 10, and over the entire height of the cylinder barrels 14.
  • the second water chamber 32 opens on the upper face 4 of the cylinder block 10 through inlet orifices 34.
  • the second water chamber 32 is connected to the outlet passage 18 in its lower part. This outlet passage 18 opens on a side face 6 of the cylinder block 10, in order to be connected to the cooling circuit out of the casing 10.
  • the cooling circuit out of the casing 10 can be composed of a liquid cooling element such as a radiator, a pump and any other element used in this type of circuit.
  • the outlet openings 32 of the first water chamber 24, and the inlet ports 34 of the second water chamber 32, located on the upper face 4 of the cylinder block 10, correspond to inlet and outlet ports. outlet of the water chamber of the cylinder head.
  • the operation of the invention is as follows:
  • the feed passage 16 feeds the distributor 22 of the first water chamber 24, wherein the fluid flows in the length of the housing 10.
  • the distributor 22 allows the coolant to feed the first water chamber 24 over its entire length.
  • the separation between the upper portion 26 and the lower portion 22 of the water chamber 24, is achieved by main orifices 28 whose sections are calibrated so as to obtain a homogeneous distribution of the flow of coolant in the rising chamber water 26 of the first water chamber 24.
  • the fluid flows in the water rising chamber 26 along each cylinder in the direction of the upper portion of the housing 10.
  • the main ports 28 allow to balance the flow rate between the different cylinders 14. For this, their section is calibrated according to their distance from the water supply passage 16.
  • the section of the main orifices 28 decreases with the removal of the main orifices 28 with respect to the water supply passage 16.
  • the water rising chamber 26 of the casing 10 supplies the water chamber of the cylinder head. After passing through the cylinder head in the direction of the width of the engine, the coolant returns to the second water chamber 32 of the cylinder block 10, before being discharged through the outlet passage 18 on a side face 6 of the casing. cylinder 10.
  • the upper part 26 of the first water chamber 24 of the cylinder block 10 communicates with the distributor 22 through the main orifices 28 as in the first embodiment. , and by secondary orifices 40 placed at the level of the interferences 42.
  • the section of the secondary orifices 40 is calibrated so as to obtain a vertical flow locally at the level of the interferences 42, allowing a separation of the flows coming from the main orifices 28, by straightening them vertically due to the higher kinetic energy of the flux from the secondary ports 40.
  • One of the advantages of this embodiment is to straighten each flow coming from the main orifices 28 by means of the flows created by the secondary orifices 40, and thus to obtain a better distribution of the coolant between the rolls 14.
  • the invention is not limited to the two embodiments described above. It can be applied according to other variants, as, for example, by adding a distributor for the evacuation of the liquid from the second chamber as in FIG. 9.
  • the second water chamber 32 of the crankcase 10 comprises, as in the first water chamber 24, an upper part and a lower part, the two parts being connected to each other by orifices whose section may vary depending on the distance of the orifices relative to each other. at the exit passage.
  • the lower part of the second water chamber has material passages 44, located at the level of the interferences 42, and in the axis of the bolt for tightening the cylinder head to allow the transmission of tightening forces of the screws towards the low structure of the cylinder block 10.
  • the invention is not limited to the case of four-cylinder in-line engines as described in the examples. It also applies to all other engine architectures, such as those in V, W, flat or star, and whatever the number of cylinders, each bank of cylinders can be considered as the basic example of the engine in line and to which the invention applies.
  • the entire flow structure of the coolant is created during the molding of the cylinder block.
  • the calibration of the section of the main orifices therefore does not require any additional boring or the use of additional elements such as inserts during casting. These characteristics therefore give an economic advantage to the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The invention proposes a cylinder housing structure (10) of an internal combustion engine, for the circulation of a liquid coolant, the liquid circulating via a supply channel (16) from an initial water chamber (24), longitudinally encompassing an initial side of the cylinder walls (14), and from a discharge pipe (18). According to the invention, the initial water chamber (24) of the cylinder housing (10) includes an upper section (26) intended for the circulation of fluid along the length of each cylinder in the direction of the upper section of the housing, and a lower section (22) allowing a longitudinal circulation of fluid in the lower part of the cylinder housing (10), both parts (22 and 26) being inter-connected by principal orifices (28) allowing the distribution of fluid from the lower section (22) to the upper section (26).

Description

STRUCTURE DE REFROIDISSEMENT D'UN CARTER CYLINDRE COOLING STRUCTURE OF A CYLINDER HOUSING
La présente invention concerne le refroidissement des moteurs à combustion interne. En particulier, l'invention se rapporte à une structure d'un carter cylindre pour la circulation d'un liquide de refroidissement dans le moteur.The present invention relates to the cooling of internal combustion engines. In particular, the invention relates to a structure of a cylinder block for the circulation of a coolant in the engine.
Le carter cylindre contient les chambres de combustion du moteur, et présente des cavités, dites chambres d'eau, dans lesquelles circule un fluide de refroidissement. Les circuits de refroidissement, et en particulier la structure des chambres d'eau, sont conçus pour éviter les points chauds dans le moteur, et obtenir une bonne répartition des températures entre chaque chambre de combustion.The cylinder block contains the combustion chambers of the engine, and has cavities, called water chambers, in which circulates a cooling fluid. The cooling circuits, and in particular the structure of the water chambers, are designed to avoid hot spots in the engine, and to obtain a good distribution of temperatures between each combustion chamber.
La publication FR 2 858 357 propose une structure de refroidissement de moteur, dans laquelle le liquide de refroidissement circule parallèlement à l'axe des cylindres. Un passage d'alimentation dans le carter délivre le liquide dans une première chambre d'eau d'un coté des cylindres. Le liquide de refroidissement traverse ensuite une chambre d'eau dans la culasse, et passe enfin dans une seconde chambre d'eau de l'autre coté des cylindres. La répartition du fluide sur chaque poste de combustion est réalisée dans le passage d'alimentation, en dimensionnant le diamètre de l'alésage du passage. Cependant une telle structure ne garantie pas une circulation parallèle à l'axe des cylindres, et sa réalisation reste complexe et onéreuse à mettre en oeuvre.The publication FR 2 858 357 proposes an engine cooling structure in which the cooling liquid circulates parallel to the axis of the cylinders. A feed passage in the housing delivers the liquid into a first water chamber on one side of the cylinders. The coolant then passes through a water chamber in the cylinder head, and finally goes into a second water chamber on the other side of the cylinders. The distribution of the fluid on each combustion station is carried out in the feed passage, by dimensioning the diameter of the bore of the passage. However, such a structure does not guarantee circulation parallel to the cylinder axis, and its implementation remains complex and expensive to implement.
Le but de l'invention, est de proposer une structure de refroidissement d'un carter cylindre améliorée, de conception simple, et permettant une distribution équilibrée du flux de liquide de refroidissement parallèlement à chaque cylindre.The object of the invention is to provide a cooling structure of an improved cylinder block, of simple design, and allowing a balanced distribution of the coolant flow parallel to each cylinder.
Dans ce but, l'invention propose une structure d'un carter cylindre d'un moteur à combustion interne, dont la première chambre d'eau comporte une partie supérieure destinée à la circulation du fluide le long de chaque cylindre en direction de la partie supérieure du carter cylindre, et une partie inférieure permettant une circulation longitudinale du fluide dans la partie basse du carter cylindre, les deux parties étant reliées l'une à l'autre par des orifices principaux permettant la distribution du fluide de la partie inférieure à la partie supérieure.For this purpose, the invention proposes a structure of a cylinder block of an internal combustion engine, whose first water chamber comprises an upper part intended for the circulation of the fluid along each cylinder towards the part upper part of the cylinder block, and a lower part allowing a longitudinal circulation of the fluid in the lower part of the cylinder block, the two parts being connected to one another by orifices. the main distribution of fluid from the bottom to the top.
Selon d'autres caractéristiques de l'invention, les orifices principaux peuvent se situer au niveau de chaque fût de cylindre pour répartir le liquide de refroidissement sur chaque cylindre.According to other features of the invention, the main orifices may be located at each cylinder drum to distribute the coolant on each cylinder.
La section des orifices principaux peut varier en fonction de l'éloignement de ces orifices par rapport au passage d'alimentation. Notamment, la section des orifices principaux peut diminuer avec l'éloignement des orifices par rapport au passage d'alimentation. La première chambre d'eau du carter cylindre peut comporter des orifices secondaires reliant la partie supérieure et la partie inférieure de la première chambre d'eau, et permettant de redresser le flux de liquide provenant des orifices principaux au sein de la partie supérieure. Les orifices secondaires peuvent se situer au niveau de chaque interfût de cylindre. La partie inférieure de la première chambre d'eau peut posséder des passages de matière, situés au niveau des interfûts, et dans l'axe des vis de serrage de la culasse pour permettre la transmission des efforts de serrage des vis vers la structure basse du carter cylindre.The section of the main ports may vary depending on the distance of these orifices relative to the supply passage. In particular, the section of the main orifices may decrease with the distance of the orifices relative to the feed passage. The first water chamber of the cylinder block may comprise secondary orifices connecting the upper part and the lower part of the first water chamber, and for straightening the flow of liquid from the main orifices within the upper part. Secondary ports may be located at each cylinder interference. The lower part of the first water chamber may have material passages, located at the level of the interferences, and in the axis of the clamping screws of the cylinder head to allow the transmission of the tightening forces of the screws to the lower structure of the cylinder head. cylinder block.
La seconde chambre d'eau du carter cylindre peut comporter, comme dans la première chambre d'eau, une partie supérieure et une partie inférieure, les deux parties étant reliées l'une à l'autre par des orifices, se situant au niveau de chaque fût de cylindre, et dont la section peut varier en fonction de l'éloignement des orifices par rapport au passage de sortie.The second water chamber of the cylinder block may comprise, as in the first water chamber, an upper part and a lower part, the two parts being connected to one another by orifices, being at the level of each cylinder barrel, and whose section may vary depending on the distance of the orifices relative to the outlet passage.
La partie inférieure de la seconde chambre d'eau peut posséder des passages de matière, situés au niveau des interfûts, et dans l'axe des vis de serrage de la culasse pour permettre la transmission des efforts de serrage des vis vers la structure basse du carter cylindre.The lower part of the second water chamber may have material passages, located at the level of the interferences, and in the axis of the tightening bolts of the cylinder head to allow the transmission of tightening forces of the screws to the lower structure of the cylinder head. cylinder block.
L'invention sera désormais décrite dans des exemples en référence aux dessins annexés suivants : - la figure 1 est un schéma en perspective du carter cylindre selon un premier mode de réalisation de l'invention; - la figure 2 est une vue de dessus du carter cylindre de la figure 1 ; - la figure 3 est une vue en coupe horizontale au niveau des orifices principaux du carter cylindre de la figure 1 ;The invention will now be described in examples with reference to the following appended drawings: FIG. 1 is a perspective diagram of the cylinder block according to a first embodiment of the invention; - Figure 2 is a top view of the cylinder block of Figure 1; - Figure 3 is a horizontal sectional view at the main openings of the cylinder block of Figure 1;
- la figure 4 est une vue en coupe horizontale au niveau des passages de matière du répartiteur du carter cylindre de la figure 1 ; - la figure 5 est une vue en coupe verticale perpendiculairement à la ligne des cylindres, au niveau des passages de matière du répartiteur du carter cylindre de la figure 1 ;- Figure 4 is a horizontal sectional view at the material passages of the distributor of the cylinder block of Figure 1; - Figure 5 is a vertical sectional view perpendicular to the line of the cylinders, at the material passages of the distributor of the cylinder block of Figure 1;
- la figure 6 est un schéma en perspective du carter cylindre selon un second mode de réalisation de l'invention; - la figure 7 est une vue en coupe horizontale au niveau des orifices secondaires du carter cylindre de la figure 6 ;- Figure 6 is a perspective diagram of the cylinder block according to a second embodiment of the invention; - Figure 7 is a horizontal sectional view at the secondary orifices of the cylinder block of Figure 6;
- la figure 8 est une vue en coupe verticale perpendiculairement à la ligne des cylindres, au niveau des passages de matière du répartiteur du carter cylindre de la figure 6 ; - La figure 9 est un schéma en perspective du carter cylindre selon un autre mode de réalisation de l'invention.- Figure 8 is a vertical sectional view perpendicular to the line of the cylinders, at the material passages of the distributor of the cylinder block of Figure 6; - Figure 9 is a perspective diagram of the cylinder block according to another embodiment of the invention.
En référence aux figures 1 à 5, illustrant un premier mode de réalisation de l'invention, un moteur à combustion interne comprend un carter cylindre 10 et une culasse (non représentée) fixée sur le carter cylindre 10. Le carter cylindre 10 ainsi que la culasse sont, généralement, des pièces moulées en acier, en fonte ou en aluminium.Referring to Figures 1 to 5, illustrating a first embodiment of the invention, an internal combustion engine comprises a cylinder block 10 and a cylinder head (not shown) attached to the cylinder block 10. The cylinder block 10 and the cylinder head are, generally, castings made of steel, cast iron or aluminum.
Le carter cylindre 10 présente quatre fûts de cylindre 14, disposés en ligne dans la longueur du carter cylindre 10. Ces fûts de cylindre 14 forment les chambres de combustion du moteur, dans lesquelles les pistons sont placés.The cylinder block 10 has four cylinder drums 14 arranged in line in the length of the cylinder block 10. These cylinder drums 14 form the combustion chambers of the engine, in which the pistons are placed.
Le carter cylindre 10 comprend aussi un passage d'alimentation 16, des chambres d'eau 24 et 32, et un passage de sortie 18, destinés à la circulation d'un liquide de refroidissement dans le moteur.The cylinder block 10 also comprises a feed passage 16, water chambers 24 and 32, and an outlet passage 18, for the circulation of a coolant in the engine.
Le passage d'alimentation 16 est situé à une extrémité du carter cylindre 10. Dans cet exemple le passage d'alimentation 16 est situé dans la largeur du côté de la face avant 2 du carter cylindre 10. L'entrée de ce passage d'alimentation 16 est connectée à une pompe. Le passage d'alimentation 16 débouche sur la partie inférieure 22 d'une première chambre d'eau 24, en formant un coude avec cette dernière. Cette partie inférieure 22 est dénommée répartiteur 22.The feed passage 16 is located at one end of the crankcase 10. In this example the feed passage 16 is located in the width of the side of the front face 2 of the crankcase 10. The entrance of this passage of power supply 16 is connected to a pump. The feed passage 16 opens on the lower portion 22 of a first water chamber 24, forming a bend with the latter. This lower part 22 is called tundish 22.
Le répartiteur 22 se situe dans la partie basse du carter cylindre 10, et s'étend sur toute la longueur du carter 10, en enveloppant les cotés latéraux par rapport à la ligne des cylindres 14, de la partie inférieure des parois des fûts 14.The distributor 22 is located in the lower part of the cylinder housing 10, and extends over the entire length of the housing 10, by wrapping the lateral sides with respect to the line of the cylinders 14, the lower part of the walls of the barrels 14.
Le répartiteur 22 possède des passages de matière 44 situés dans l'axe des alésages 46 pour la fixation des vis de serrage de la culasse, et dans les plans passant au niveau des interfûts 42 perpendiculairement à la ligne des cylindres 14. Ces passages de matière 44 permettent la transmission des efforts de serrage des vis de la culasse vers la structure basse du carter cylindre 10. Avantageusement les alésages 48 pour la fixation des chapeaux palier à la partie basse du carter cylindre 10, sont dans l'axe des passages de matière 44 et des alésages 46 pour la fixation des vis de serrage de la culasse. De cette manière, les efforts de serrage de la culasse et des chapeaux palier, s'opposent dans le carter cylindre 10.The distributor 22 has material passages 44 located in the axis of the bores 46 for fixing the tightening screws of the cylinder head, and in the planes passing at the level of the interferences 42 perpendicular to the line of the cylinders 14. These passages of material 44 allow the transmission of clamping forces of the bolts of the cylinder head to the low structure of the crankcase 10. Advantageously the bores 48 for fixing the bearing caps to the lower part of the crankcase 10, are in the axis of the material passages 44 and bores 46 for fixing the tightening screws of the cylinder head. In this way, the clamping forces of the cylinder head and bearing caps, are opposed in the cylinder block 10.
La partie supérieure 26 de la première chambre d'eau 24 est destinée à la circulation de liquide de refroidissement le long des parois des fûts 14, et parallèlement à l'axe des cylindres. La partie supérieure 26 de la première chambre d'eau 24 est nommée chambre de montée d'eau. Cette chambre de montée d'eau 26 s'étend sur toute la longueur du carter 10 au dessus du répartiteur 22, et enveloppe les côtés latéraux par rapport à la ligne des cylindres 14, de la partie supérieure des parois des fûts 14. La partie supérieure 26 de la première chambre d'eau 24 du carter cylindre 10 communique avec le répartiteur 22 par des orifices principaux 28. Les orifices principaux 28 sont situés au niveau de chaque fût 14. La section des orifices principaux 28 est calibrée de manière à obtenir une distribution homogène du flux de liquide de refroidissement sur chaque cylindre 14. La première chambre d'eau 24 débouche sur la face supérieure 4 du carter cylindre 10 par des orifices de sortie 30. Une seconde chambre d'eau 32 du carter cylindre enveloppe les côtés latéraux par rapport à la ligne des cylindres 14, des parois des fûts 14 opposé à la première chambre d'eau. Cette seconde chambre 32 s'étend sur toute la longueur du carter cylindre 10, et sur toute la hauteur des fûts de cylindre 14. La seconde chambre d'eau 32 débouche sur la face supérieure 4 du carter cylindre 10 par des orifices d'entrée 34. La seconde chambre d'eau 32 est reliée au passage de sortie 18 dans sa partie inférieure. Ce passage de sortie 18 débouche sur une face latérale 6 du carter cylindre 10, afin d'être raccordé au circuit de refroidissement hors du carter 10. Le circuit de refroidissement hors du carter 10 peut être composé d'élément de refroidissement du liquide comme un radiateur, d'une pompe et de tout autre élément utilisé dans ce type de circuit.The upper part 26 of the first water chamber 24 is intended for the circulation of cooling liquid along the walls of the drums 14, and parallel to the axis of the cylinders. The upper part 26 of the first water chamber 24 is called the water rising chamber. This water rising chamber 26 extends over the entire length of the housing 10 above the distributor 22, and envelops the lateral sides with respect to the line of the cylinders 14, the upper part of the walls of the barrels 14. The part upper 26 of the first water chamber 24 of the cylinder block 10 communicates with the distributor 22 through the main ports 28. The main ports 28 are located at each barrel 14. The section of the main ports 28 is calibrated to obtain a homogeneous distribution of the coolant flow on each cylinder 14. The first water chamber 24 opens on the upper face 4 of the cylinder block 10 through outlet orifices 30. A second water chamber 32 of the cylinder housing surrounds the lateral sides with respect to the line of the cylinders 14, the walls of the barrels 14 opposite the first water chamber. This second chamber 32 extends over the entire length of the cylinder block 10, and over the entire height of the cylinder barrels 14. The second water chamber 32 opens on the upper face 4 of the cylinder block 10 through inlet orifices 34. The second water chamber 32 is connected to the outlet passage 18 in its lower part. This outlet passage 18 opens on a side face 6 of the cylinder block 10, in order to be connected to the cooling circuit out of the casing 10. The cooling circuit out of the casing 10 can be composed of a liquid cooling element such as a radiator, a pump and any other element used in this type of circuit.
Les orifices de sortie 32 de la première chambre d'eau 24, et les orifices d'entrée 34 de la seconde chambre d'eau 32, situés sur la face supérieure 4 du carter cylindre 10, correspondent à des orifices d'entrée et de sortie de la chambre d'eau de la culasse.The outlet openings 32 of the first water chamber 24, and the inlet ports 34 of the second water chamber 32, located on the upper face 4 of the cylinder block 10, correspond to inlet and outlet ports. outlet of the water chamber of the cylinder head.
Le fonctionnement de l'invention est le suivant : Le liquide de refroidissement entraîné par une pompe, située à l'extérieur du moteur, pénètre dans la première chambre d'eau 24 du carter cylindre 10, par le passage d'alimentation 16. Le passage d'alimentation 16 alimente le répartiteur 22 de la première chambre d'eau 24, dans lequel le fluide circule dans la longueur du carter 10.The operation of the invention is as follows: The coolant driven by a pump, located outside the engine, enters the first water chamber 24 of the cylinder block 10, through the feed passage 16. The feed passage 16 feeds the distributor 22 of the first water chamber 24, wherein the fluid flows in the length of the housing 10.
Le répartiteur 22 permet au liquide de refroidissement d'alimenter la première chambre d'eau 24 sur toute sa longueur. La séparation entre la partie supérieure 26 et la partie inférieure 22 de la chambre d'eau 24, est réalisée par des orifices principaux 28 dont les sections sont calibrées de manière à obtenir une distribution homogène du flux de liquide de refroidissement dans la chambre de montée d'eau 26 de la première chambre d'eau 24. Le fluide circule dans la chambre de montée d'eau 26 le long de chaque cylindre en direction de la partie supérieure du carter 10. Les orifices principaux 28 permettent d'équilibrer le débit entre les différents cylindres 14. Pour cela, leur section est calibrée en fonction de leur éloignement du passage d'alimentation d'eau 16. La section des orifices principaux 28 diminue avec l'éloignement des orifices principaux 28 par rapport au passage d'alimentation d'eau 16.The distributor 22 allows the coolant to feed the first water chamber 24 over its entire length. The separation between the upper portion 26 and the lower portion 22 of the water chamber 24, is achieved by main orifices 28 whose sections are calibrated so as to obtain a homogeneous distribution of the flow of coolant in the rising chamber water 26 of the first water chamber 24. The fluid flows in the water rising chamber 26 along each cylinder in the direction of the upper portion of the housing 10. The main ports 28 allow to balance the flow rate between the different cylinders 14. For this, their section is calibrated according to their distance from the water supply passage 16. The section of the main orifices 28 decreases with the removal of the main orifices 28 with respect to the water supply passage 16.
La chambre de montée d'eau 26 du carter 10 alimente la chambre d'eau de la culasse. Après avoir traversé la culasse dans le sens de la largeur du moteur, le liquide de refroidissement redescend dans la seconde chambre d'eau 32 du carter cylindre 10, avant d'être évacué par le passage de sortie 18 sur une face latérale 6 du carter cylindre 10.The water rising chamber 26 of the casing 10 supplies the water chamber of the cylinder head. After passing through the cylinder head in the direction of the width of the engine, the coolant returns to the second water chamber 32 of the cylinder block 10, before being discharged through the outlet passage 18 on a side face 6 of the casing. cylinder 10.
Selon un autre mode de réalisation, en référence aux figures 6, 7 et 8, la partie supérieure 26 de la première chambre d'eau 24 du carter cylindre 10 communique avec le répartiteur 22 par des orifices principaux 28 comme dans le premier mode de réalisation, et par des orifices secondaires 40 placés au niveau des interfûts 42. La section des orifices secondaires 40 est calibrée de manière à obtenir un écoulement vertical localement au niveau des interfûts 42, permettant une séparation des flux provenant des orifices principaux 28, en les redressant verticalement du fait de l'énergie cinétique plus élevée du flux provenant des orifices secondaires 40.According to another embodiment, with reference to FIGS. 6, 7 and 8, the upper part 26 of the first water chamber 24 of the cylinder block 10 communicates with the distributor 22 through the main orifices 28 as in the first embodiment. , and by secondary orifices 40 placed at the level of the interferences 42. The section of the secondary orifices 40 is calibrated so as to obtain a vertical flow locally at the level of the interferences 42, allowing a separation of the flows coming from the main orifices 28, by straightening them vertically due to the higher kinetic energy of the flux from the secondary ports 40.
Un des avantages de ce mode de réalisation, est de redresser chaque flux provenant des orifices principaux 28 à l'aide des flux créés par les orifices secondaires 40, et ainsi obtenir une meilleure répartition du liquide de refroidissement entre les cylindres 14.One of the advantages of this embodiment is to straighten each flow coming from the main orifices 28 by means of the flows created by the secondary orifices 40, and thus to obtain a better distribution of the coolant between the rolls 14.
L'invention n'est pas limitée aux deux modes de réalisations décrits précédemment. Elle peut être appliquée selon d'autres variantes, comme, par exemple, en ajoutant un répartiteur pour l'évacuation du liquide de la seconde chambre comme sur la figure 9. Selon cette variante, la seconde chambre d'eau 32 du carter cylindre 10 comporte, comme dans la première chambre d'eau 24, une partie supérieure et une partie inférieure, les deux parties étant reliées l'une à l'autre par des orifices dont la section peut varier en fonction de l'éloignement des orifices par rapport au passage de sortie. La partie inférieure de la seconde chambre d'eau possède des passages de matière 44, situés au niveau des interfûts 42, et dans l'axe des vis de serrage de la culasse pour permettre la transmission des efforts de serrage des vis vers la structure basse du carter cylindre 10.The invention is not limited to the two embodiments described above. It can be applied according to other variants, as, for example, by adding a distributor for the evacuation of the liquid from the second chamber as in FIG. 9. According to this variant, the second water chamber 32 of the crankcase 10 comprises, as in the first water chamber 24, an upper part and a lower part, the two parts being connected to each other by orifices whose section may vary depending on the distance of the orifices relative to each other. at the exit passage. The lower part of the second water chamber has material passages 44, located at the level of the interferences 42, and in the axis of the bolt for tightening the cylinder head to allow the transmission of tightening forces of the screws towards the low structure of the cylinder block 10.
L'invention ne se limite pas non plus au cas des moteurs à quatre cylindres en ligne comme décrit dans les exemples. Elle s'applique aussi pour toutes autres architectures de moteur, comme celles en V, en W, à plat ou en étoile, et quelque soit le nombre de cylindres, chaque banc de cylindres pouvant être considéré comme l'exemple de base du moteur en ligne et auquel s'applique l'invention.The invention is not limited to the case of four-cylinder in-line engines as described in the examples. It also applies to all other engine architectures, such as those in V, W, flat or star, and whatever the number of cylinders, each bank of cylinders can be considered as the basic example of the engine in line and to which the invention applies.
Dans tous les modes de réalisations, toute la structure de circulation du liquide de refroidissement est créée lors du moulage du carter cylindre. Le calibrage de la section des orifices principaux ne nécessite donc aucun alésage supplémentaire, ni l'utilisation d'éléments supplémentaires comme des inserts à la coulée. Ces caractéristiques donne donc un avantage économique à l'invention. In all embodiments, the entire flow structure of the coolant is created during the molding of the cylinder block. The calibration of the section of the main orifices therefore does not require any additional boring or the use of additional elements such as inserts during casting. These characteristics therefore give an economic advantage to the invention.

Claims

REVENDICATIONS
1. Structure d'un carter cylindre (10) d'un moteur à combustion interne, pour la circulation d'un liquide de refroidissement, le liquide circulant au travers d'un passage d'alimentation (16), d'une première chambre d'eau (24) enveloppant longitudinalement un premier côté des parois des cylindres (14), d'une seconde chambre d'eau (32) enveloppant longitudinalement un second côté des parois des cylindres (14), et d'un passage de sortie (18), caractérisée en ce que la première chambre d'eau (24) du carter cylindre (10) comporte une partie supérieure (26) destinée à la circulation du fluide le long de chaque cylindre en direction de la partie supérieure du carter (10), et une partie inférieure (22) permettant une circulation longitudinale du fluide dans la partie basse du carter cylindre (10), les deux parties (22 et 26) étant reliées l'une à l'autre par des orifices principaux (28) permettant la distribution du fluide de la partie inférieure (22) à la partie supérieure (26).1. Structure of a crankcase (10) of an internal combustion engine, for the circulation of a coolant, the liquid flowing through a feed passage (16), a first chamber of water (24) longitudinally enveloping a first side of the cylinder walls (14), a second water chamber (32) longitudinally enveloping a second side of the walls of the cylinders (14), and an outlet passage (18), characterized in that the first water chamber (24) of the cylinder housing (10) has an upper portion (26) for the circulation of the fluid along each cylinder towards the upper part of the housing ( 10), and a lower part (22) allowing a longitudinal circulation of the fluid in the lower part of the cylinder block (10), the two parts (22 and 26) being connected to one another by main orifices (28). ) allowing the distribution of the fluid from the lower part (22) to the upper part (26).
2. Structure d'un carter cylindre (10) selon la revendication 1 , caractérisée en ce que les orifices principaux (28) se situent au niveau de chaque fût de cylindre (14) pour répartir le liquide de refroidissement sur chaque cylindre.2. Structure of a cylinder block (10) according to claim 1, characterized in that the main orifices (28) are located at each cylinder drum (14) for distributing the cooling liquid on each cylinder.
3. Structure d'un carter cylindre (10) selon une des revendications précédentes, caractérisée en ce que la section des orifices principaux (28) varie en fonction de l'éloignement des orifices (28) par rapport au passage d'alimentation (16).3. Structure of a cylinder block (10) according to one of the preceding claims, characterized in that the section of the main openings (28) varies as a function of the distance of the orifices (28) relative to the feed passage (16). ).
4. Structure d'un carter cylindre (10) selon une des revendications précédentes, caractérisée en ce que la section des orifices principaux (28) diminue avec l'éloignement des orifices (28) par rapport au passage d'alimentation (16). 4. Structure of a cylinder block (10) according to one of the preceding claims, characterized in that the section of the main openings (28) decreases with the distance of the orifices (28) relative to the feed passage (16).
5. Structure d'un carter cylindre (10) selon une des revendications précédentes, caractérisée en ce que la première chambre d'eau (24) du carter cylindre (10) comporte des orifices secondaires (40) reliant la partie supérieure (26) et la partie inférieure (22) de la première chambre d'eau (24), lesdits orifices secondaires (40) permettant de redresser le flux de liquide provenant des orifices principaux (28) au sein de la partie supérieure (26).5. Structure of a cylinder block (10) according to one of the preceding claims, characterized in that the first water chamber (24) of the cylinder block (10) has secondary orifices (40) connecting the upper part (26). and the lower portion (22) of the first water chamber (24), said secondary ports (40) for straightening the flow of liquid from the main ports (28) within the upper portion (26).
6. Structure d'un carter cylindre (10) selon la revendication 5, caractérisée en ce que les orifices secondaires (40) se situent au niveau de chaque interfût (42) de cylindre (14).6. Structure of a cylinder block (10) according to claim 5, characterized in that the secondary orifices (40) are located at each interfering (42) cylinder (14).
7. Structure d'un carter cylindre (10) selon une des revendications précédentes, caractérisée en ce que la partie inférieure (22) de la première chambre d'eau (24) possède des passages de matière (44), situés au niveau des interfûts (42), et dans l'axe des vis de serrage de la culasse pour permettre la transmission des efforts de serrage des vis vers la structure basse du carter cylindre (10).7. Structure of a cylinder block (10) according to one of the preceding claims, characterized in that the lower portion (22) of the first water chamber (24) has material passages (44), located at the interferences (42), and in the axis of the bolts of the cylinder head to allow the transmission of tightening forces of the screws to the lower structure of the cylinder block (10).
8. Structure d'un carter cylindre (10) selon une des revendications précédentes, caractérisée en ce que la seconde chambre d'eau (32) du carter cylindre (10) comporte une partie supérieure et une partie inférieure, les deux parties étant reliées l'une à l'autre par des orifices, se situant au niveau de chaque fût de cylindre (14).8. Structure of a cylinder block (10) according to one of the preceding claims, characterized in that the second water chamber (32) of the cylinder block (10) comprises an upper part and a lower part, the two parts being connected to each other through orifices, located at each barrel drum (14).
9. Structure d'un carter cylindre (10) selon la revendication 8, caractérisée en ce que la section des orifices reliant la partie supérieure et la partie inférieure de la seconde chambre d'eau (32), varie en fonction de l'éloignement des orifices par rapport au passage de sortie (18). 9. Structure of a cylinder block (10) according to claim 8, characterized in that the section of the orifices connecting the upper part and the lower part of the second water chamber (32), varies depending on the distance orifices relative to the outlet passage (18).
10. Structure d'un carter cylindre (10) selon une des revendications 8 ou 9, caractérisée en ce que la partie inférieure de la seconde chambre d'eau (32) possède des passages de matière, situés au niveau des interfûts (42), et dans l'axe des vis de serrage de la culasse pour permettre la transmission des efforts de serrage des vis vers la structure basse du carter cylindre (10). 10. Structure of a cylinder block (10) according to one of claims 8 or 9, characterized in that the lower part of the second water chamber (32) has material passages, located at the level of the interferences (42) , and in the axis of the clamping screws of the cylinder head to allow the transmission of tightening forces of the screws to the lower structure of the cylinder block (10).
EP07766001A 2006-05-31 2007-05-04 Cylinder housing cooling structure Not-in-force EP2024617B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0651966A FR2901842B1 (en) 2006-05-31 2006-05-31 COOLING STRUCTURE OF A CYLINDER HOUSING
PCT/FR2007/051221 WO2007138206A1 (en) 2006-05-31 2007-05-04 Cylinder housing cooling structure

Publications (2)

Publication Number Publication Date
EP2024617A1 true EP2024617A1 (en) 2009-02-18
EP2024617B1 EP2024617B1 (en) 2010-01-20

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EP07766001A Not-in-force EP2024617B1 (en) 2006-05-31 2007-05-04 Cylinder housing cooling structure

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EP (1) EP2024617B1 (en)
JP (1) JP5062860B2 (en)
AT (1) ATE455940T1 (en)
DE (1) DE602007004478D1 (en)
ES (1) ES2335943T3 (en)
FR (1) FR2901842B1 (en)
WO (1) WO2007138206A1 (en)

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CN109184941A (en) * 2018-10-29 2019-01-11 中车戚墅堰机车有限公司 A kind of diesel-engine body water channel

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JPS6220148U (en) * 1985-07-23 1987-02-06
JPH04140457A (en) * 1990-09-28 1992-05-14 Mazda Motor Corp Cylinder block structure of engine
US5080049A (en) * 1991-05-10 1992-01-14 General Motors Corporation Two stroke engine with tiered cylinder cooling
JP3086929B2 (en) * 1991-07-29 2000-09-11 マツダ株式会社 Engine cooling structure
FR2682994B1 (en) * 1991-10-25 1993-12-10 Renault Regie Nale Usines LIQUID COOLING CIRCUIT FOR INTERNAL COMBUSTION ENGINE.
DE19838746C2 (en) * 1998-08-26 2000-08-31 Daimler Chrysler Ag Water-cooled internal combustion engine
JP4297618B2 (en) * 2001-01-25 2009-07-15 ヤンマー株式会社 Cylinder block cooling structure for internal combustion engine
DE10247122A1 (en) * 2002-10-09 2004-04-22 Bayerische Motoren Werke Ag Cylinder crankcase with cooling jacket for internal combustion engine has jacket forming two or more coolant channels in region of upper case sector

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Title
See references of WO2007138206A1 *

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JP5062860B2 (en) 2012-10-31
WO2007138206A1 (en) 2007-12-06
ATE455940T1 (en) 2010-02-15
ES2335943T3 (en) 2010-04-06
FR2901842A1 (en) 2007-12-07
EP2024617B1 (en) 2010-01-20
DE602007004478D1 (en) 2010-03-11
FR2901842B1 (en) 2008-07-11

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