EP2342435A1 - Dispositif de refroidissement pour moteur a combustion interne - Google Patents
Dispositif de refroidissement pour moteur a combustion interneInfo
- Publication number
- EP2342435A1 EP2342435A1 EP09760197A EP09760197A EP2342435A1 EP 2342435 A1 EP2342435 A1 EP 2342435A1 EP 09760197 A EP09760197 A EP 09760197A EP 09760197 A EP09760197 A EP 09760197A EP 2342435 A1 EP2342435 A1 EP 2342435A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- cylinder head
- chamber
- cylinder
- cylinder block
- 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
- 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
- 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
- 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
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/04—Lubricant cooler
-
- 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
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/12—Turbo charger
Definitions
- the present invention relates to a cooling device for an internal combustion engine provided with a cylinder block and a cylinder head between which is disposed a cylinder head gasket. It relates in particular to a cooling device provided with a lower chamber for cooling the cylinder head and an upper chamber for cooling the cylinder head.
- the invention finds particular application in the field of diesel engines and spark ignition engines of motor vehicles.
- the cooling device 1 comprises a cooling chamber 2 of the cylinder block of the engine, supplied with cooling liquid by a coolant pump 3 via a line 4.
- the device 1 also comprises a lower chamber 5 for cooling the engine cylinder head and an upper chamber 6 for cooling the cylinder head disposed generally above the lower enclosure 5.
- a cylinder head gasket 7 is disposed between the enclosure of cooling 2 of the cylinder block and the lower chamber 5 for cooling the cylinder head.
- the cylinder head gasket 7 is a metalloplastic gasket placed between the cylinder head and the cylinder block, and sealing the combustion chamber and the cooling chambers 2,5,6, to each other and to the outside.
- the cooling chamber 2 of the cylinder block, the lower chamber 5 for cooling the cylinder head and the upper chamber 6 The cooling of the cylinder head is able to be traversed by the cooling fluid.
- the coolant passes from the cooling chamber 2 of the cylinder block to the lower and upper chamber 6 for the cooling of the cylinder head via orifices 8 located in the cylinder head gasket 7.
- the upper chamber 6 of the cylinder head has a portion 6a bent towards the cylinder head gasket 7.
- the portion 6a is of complicated geometry, because it has curved areas and small dimensions. This particular geometry complicates the manufacturing processes, which entails additional costs. This geometry also poses problems of mechanical resistance. It induces mechanical stresses that can lead to cracking of the upper chamber 6 of the cylinder head. Finally, this geometry can cause high pressure drops, which has a negative impact on the dim ensionnem ent of the pump.
- the present invention aims to overcome these disadvantages.
- the invention proposes a cooling device for an internal combustion engine which makes it possible to avoid the formation of these zones of complex geometry in the upper cooling chamber of the cylinder head.
- the invention thus relates to a cooling device for an internal combustion engine m uni of a cylinder block and a cylinder head between which is disposed a cylinder head gasket, the device comprising a cooling chamber. of the cylinder block, a lower cylinder head cooling chamber and an upper cylinder head cooling chamber, the lower and upper cylinder head cooling chambers being separated from one another and capable of being traversed by a cooling fluid.
- the device according to the invention comprises at least one pipe, called the upper pipe, bypassing the cylinder head gasket and permeating a circulation of cooling fluid between the cooling chamber of the cylinder block and the upper cooling chamber. head of the breech.
- the cooling fluid can be conveyed from the cooling chamber of the cylinder block to the upper cooling chamber of the cylinder head, without it being necessary to realize areas of complex geometry in the upper chamber of cooling of the cylinder head.
- the device can also include at least one pipe, called the lower pipe, bypassing the cylinder head gasket and permitting a circulation of cooling fluid between the cooling chamber of the cylinder block and the lower cooling chamber. of the breech.
- At least one heat exchanger or turbocompressor may be interposed along the upper and / or lower pipe.
- the heat exchanger is advantageously a liquid coolant / engine oil exchanger or a liquid cooling / EGR gas exchanger.
- the lower cooling chamber of the cylinder head is advantageously coupled to first coolant flow rate regulating means and the upper cooling chamber of the cylinder head is advantageously coupled with second cooling fluid flow control means. This limits the appearance of over-cooling of certain areas of the engine cylinder head.
- the engine can be a diesel engine.
- the invention also relates to a motor vehicle comprising a device described above.
- FIG. 1 already described, schematically illustrates a part of a cooling device of the state of the art
- FIG. 2a is a diagrammatic front view of a cooling device according to the invention, according to a first embodiment
- FIG. 2b is a schematic side view of the cooling device, according to the first embodiment
- FIG. 3a is a diagrammatic front view of a cooling device according to the invention, according to a variant of the first embodiment,
- FIG. 3b is a schematic side view of the cooling device, according to this variant.
- FIG 4 is a schematic front view of a cooling device according to the invention, according to a second embodiment.
- a cooling device 1 according to the invention is shown in Figures 2a and 2b, in which the elements identical to those of Figure 1 bear the same references.
- the device 1 is particularly used for diesel engines and spark ignition engines, but it could also apply to any other type of internal combustion engine, without departing from the scope of the invention.
- the device 1 comprises, as already described for the cooling device illustrated in FIG. 1, a cooling chamber 2 of the cylinder block of the engine, supplied with cooling liquid by a coolant pump 3 via a line 4, a lower chamber 5 for cooling the engine cylinder head and an upper chamber 6 for cooling the cylinder head disposed generally above the lower enclosure 5, and a cylinder head gasket 7 disposed between the cooling chamber 2 of the cylinder block and the lower chamber 5 for cooling the cylinder head, and provided with orifices 8.
- the lower chamber 5 for cooling the engine cylinder head and the upper chamber 6 for cooling the cylinder head are separated and arranged one above the other, extending parallel and longitudinally along the entire length of the engine. cylinder block of the engine.
- the upper chamber 6 of cooling of the cylinder head is further connected to a degassing zone 11. It is possible to have no connection between the lower cooling chamber 5 of the cylinder head and the upper cooling chamber 6 of cooling. the breech.
- the device 1 is not limited to two cylinder cooling chambers, and could include more, any shape, and optimally distributed to cool the various areas of the cylinder head.
- the device 1 also comprises at least one pipe 9, called the upper pipe, bypassing the cylinder head gasket 7 and allowing a circulation of cooling fluid between the cooling chamber 2 of the cylinder block and the enclosure upper 6 cooling of the cylinder head.
- the upper chamber 6 for cooling the cylinder head is thus supplied with cooling fluid by the chamber 2 for cooling the cylinder block and thus no longer needs to be in contact with the cylinder head gasket 7. This avoids the presence of a complex geométrie zone in the upper chamber 6 for cooling the cylinder head.
- the device 1 may comprise a second upper conduit 1 0 connecting the chamber 2 of cooling the cylinder block and the upper chamber 6 cooling of the cylinder head, as shown in Figure 2b.
- the two upper ducts 9, 1 0 are disposed on either side of the chamber 2 for cooling the cylinder block.
- the cooling fluid is typically a coolant.
- the cooling liquid is fed into the cooling chamber 2 of the cylinder block by pump 3. Part of the cooling liquid passes from the cooling chamber 2 of the cylinder block to the enclosure bottom 5 of the cylinder head through the orifices 8 located in the cylinder head gasket 7.
- the exchanger 1 2 coolant / engine oil is intended to perform heat exchange between the liquid of cooling and engine oil.
- the coolant also provides cooling for the turbocharger 13, which is typically the turbocharger for compressing a mixture of air and vaporized fuel to the combustion chamber of the engine.
- the exchanger 14 for cooling / gas EGR ensures the cooling of the EGR gas. It is indeed known to equip the gasoline or diesel internal combustion engines of an exhaust gas recirculation system, also called EGR for "Exhaust Gas Recirculation" in English, which translates into French as " exhaust gas recirculation ".
- EGR Exhaust Gas Recirculation
- the principle of an EGR system is to take part of the exhaust gases, including inert gases, to recirculate in the intake circuit. The presence in the intake zone of the inert gases of the exhaust gases makes it possible to slow down the rate of combustion and to absorb the calories, and thus causes a decrease in the emission of nitrogen oxides.
- the degassing zone 11 also called degassing jar, serves for the introduction of the liquid in the device 1. It also allows the evacuation of bubbles of water vapor trapped in the coolant.
- the chamber 2 for cooling the cylinder block is not connected to the lower chamber 5 for cooling the cylinder head.
- the cooling chamber 2 of the cylinder block can be connected to the upper chamber 6 for cooling the cylinder head using one or more upper pipes 9, 10. It is also possible to connect the cooling chamber 2 of the cylinder block to the lower chamber 5 cooling of the cylinder head using one or more lower lines.
- the enclosure 2 for cooling the cylinder block is connected to the upper cooling enclosure 6 of the cylinder head using a single upper pipe 10.
- the cooling chamber 2 of the cylinder block is connected to the lower chamber 5 for cooling the cylinder head with a first lower pipe 16 and a second lower pipe 17.
- the coolant is conveyed into the cooling chamber 2 of the cylinder block by the pump 3. Part of the coolant passes from the cooling chamber 2 of the cylinder block to the lower chamber 5 of the cylinder head. through the orifices 8 located in the cylinder head gasket 7.
- Part of the coolant circulating in the upper chamber 6 for cooling the cylinder head is directed to the degassing zone 11 via line 15. It is thus possible to envisage any arrangement of the heat exchangers 1 2, 14 and of the turbocompressor 13 in the cooling device 1. It is also possible to envisage having other heat exchangers and / or other appliances to be cooled along the lower and upper pipes of the cooling device.
- the lower chamber 5 for cooling the cylinder head is coupled to The first coolant flow control means 18 and the upper cylinder cooling chamber 6 are coupled to second coolant flow control means 19.
- the first coolant flow control means 18 and the second coolant flow control means 19 may be a valve, a thermostat, or any other flow control system at the same time. output of each chamber 5.6 of cooling of the cylinder head.
- the cylinder head of the engine thus equipped with the first 1 8 8 and second means 1 9 coolant flow rate control is cooled using the two chambers 5.6 cooling of the cylinder head.
- the flow rate of cooling fluid through these two chambers 5,6 can be regulated, for each of them, independently or very weakly linked.
- the device has two chambers 5.6 cooling the cylinder head may each be traversed by a different flow, any of these flows being able to undergo a variation without influencing or n ' influencing only very slightly on the value of the other flow.
- the device 1 considerably reduces the over-cooling of certain zones of the cylinder head, by modulating the cooling intensity along the zone considered.
- the speakers 5.6 optimally according to the nature of the various zones to be cooled of the cylinder head, it is possible to greatly reduce the problems associated with the unnecessary consumption of pump energy and slowdown in temperature rise in areas near the exhaust.
- the degassing of the lower cooling chamber 5 of the cylinder head can be effected either with connections between the lower cooling chamber of the cylinder head and the upper cooling chamber 6 of the cylinder head.
- cylinder head either with a particular geometry of the lower chamber 5 of cooling of the cylinder head (including for example one or more degassing lines), or by connecting a high point of the lower cooling chamber 5 of the cylinder head in the degassing jar 1 1.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0857505A FR2938011B1 (fr) | 2008-11-05 | 2008-11-05 | Dispositif de refroidissement pour moteur a combustion interne. |
| PCT/FR2009/052029 WO2010052402A1 (fr) | 2008-11-05 | 2009-10-22 | Dispositif de refroidissement pour moteur a combustion interne |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2342435A1 true EP2342435A1 (fr) | 2011-07-13 |
| EP2342435B1 EP2342435B1 (fr) | 2017-12-06 |
Family
ID=40934140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09760197.5A Active EP2342435B1 (fr) | 2008-11-05 | 2009-10-22 | Dispositif de refroidissement pour moteur a combustion interne |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2342435B1 (fr) |
| FR (1) | FR2938011B1 (fr) |
| WO (1) | WO2010052402A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2557292A1 (fr) * | 2011-08-10 | 2013-02-13 | Ford Global Technologies, LLC | Moteur à combustion interne refroidi par liquide doté d'un système de turbocompression à gaz d'échappement |
| FR3014485B1 (fr) * | 2013-12-10 | 2017-12-29 | Renault Sas | Moteur thermique de vehicule automobile a circuit de refroidissement perfectionne |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5557614A (en) * | 1978-10-23 | 1980-04-28 | Nissan Motor Co Ltd | Colling device for internal combustion engine |
| FR2841596B1 (fr) * | 2002-06-27 | 2005-12-16 | Renault Sa | Dispositif de refroidissement pour moteur a combustion interne |
| FR2855555B1 (fr) * | 2003-05-27 | 2005-07-15 | Renault Sa | Circuit de refroidissement de moteur a combustion interne |
| FR2860833B1 (fr) * | 2003-10-08 | 2007-06-01 | Peugeot Citroen Automobiles Sa | Circuit de refroidissement d'un moteur a combustion interne constitue d'au moins trois passages de refroidissement |
| JP4513669B2 (ja) * | 2004-07-02 | 2010-07-28 | トヨタ自動車株式会社 | 蓄熱装置を備えた内燃機関 |
| US7237511B2 (en) * | 2005-03-25 | 2007-07-03 | Mazda Motor Corporation | Cooling device of engine |
-
2008
- 2008-11-05 FR FR0857505A patent/FR2938011B1/fr active Active
-
2009
- 2009-10-22 WO PCT/FR2009/052029 patent/WO2010052402A1/fr not_active Ceased
- 2009-10-22 EP EP09760197.5A patent/EP2342435B1/fr active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2010052402A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010052402A1 (fr) | 2010-05-14 |
| FR2938011A1 (fr) | 2010-05-07 |
| EP2342435B1 (fr) | 2017-12-06 |
| FR2938011B1 (fr) | 2014-10-17 |
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