EP4198290A1 - Zylinderkopf einer brennkraftmaschine - Google Patents

Zylinderkopf einer brennkraftmaschine Download PDF

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Publication number
EP4198290A1
EP4198290A1 EP22210467.1A EP22210467A EP4198290A1 EP 4198290 A1 EP4198290 A1 EP 4198290A1 EP 22210467 A EP22210467 A EP 22210467A EP 4198290 A1 EP4198290 A1 EP 4198290A1
Authority
EP
European Patent Office
Prior art keywords
thermal regulation
cylinder head
regulation circuit
heating
heat transfer
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.)
Pending
Application number
EP22210467.1A
Other languages
English (en)
French (fr)
Inventor
Olivier Beisbardt
Eric Dumas
Jean-Louis Gratian
William POMMERY
Vincent PRUVOT
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.)
New H Powertrain Holding SLU
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 EP4198290A1 publication Critical patent/EP4198290A1/de
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/24—Cylinder heads
    • F02F1/26—Cylinder heads having cooling means
    • F02F1/36—Cylinder heads having cooling means for liquid cooling
    • F02F1/40—Cylinder heads having cooling means for liquid cooling cylinder heads 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
    • 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 
    • F02F1/24—Cylinder heads
    • F02F1/243—Cylinder heads and inlet or exhaust manifolds integrally cast together
    • 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
    • F01P2003/024—Cooling 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using valves

Definitions

  • the present invention falls within the field of heat engine cylinder head assemblies fitted to motor vehicles.
  • Heat engines generally include an engine block and a cylinder head covering the engine block. These two elements composing the heat engine participate in delimiting combustion chambers in which combustion of a mixture of air and fuel is carried out so as to produce the movement of the corresponding piston and generate the mechanical energy necessary to rotate a heat engine crankshaft.
  • Fuel is injected into the combustion chamber by means of intake valves whose movement is generated by the rotation of a camshaft, which may in particular be arranged in the upper part of the cylinder head, at the opposite the engine block.
  • a cylinder head cover can be attached to cover the cylinder head to seal a chamber for receiving the camshaft.
  • each combustion chamber tends to increase the temperature within the engine block and the cylinder head. It is therefore known to equip heat engines with a cooling system which comprises at least one thermal regulation circuit within which cooling fluid is able to circulate. Within the cylinder head is formed at least one circulation chamber connected to the thermal regulation circuit and therefore capable of being traversed by the cooling fluid, the circulation chamber being defined within the cylinder head in the vicinity of at least one wall delimiting a combustion chamber so that the cooling fluid circulating through the circulation chamber can evacuate the calories generated within the combustion chamber.
  • the cooling system is also connected to a heat exchanger of a ventilation, heating and/or air conditioning system so that the cooling fluid, after having been heated in contact with the components of the cylinder head, thermally regulates a flow of air passing through the heat exchanger and intended to circulate towards the passenger compartment of the vehicle.
  • a ventilation, heating and/or air conditioning system so that the cooling fluid, after having been heated in contact with the components of the cylinder head, thermally regulates a flow of air passing through the heat exchanger and intended to circulate towards the passenger compartment of the vehicle.
  • the main subject of the present invention is a cylinder head of an internal combustion engine of a vehicle comprising at least one combustion chamber extending through an internal volume of the cylinder head and an exhaust outlet extending from the at least one combustion chamber towards the outside of the cylinder head, at least one wall of the cylinder head helping to delimit the at least one combustion chamber being hollowed out to form a circulation channel for a first heat transfer fluid forming part of a first thermal regulation circuit, characterized in that it comprises a second thermal regulation circuit distinct from the first thermal regulation circuit and in which a second heat transfer fluid is able to circulate, the second regulation circuit heat being disposed in the vicinity of the exhaust outlet.
  • the cylinder head comprises several combustion chambers which respectively form a hollow within the same wall, the wall being moreover dug with a continuous channel extending in the vicinity of each of the combustion chambers and participating in forming the first circuit of thermal regulation.
  • the first heat transfer fluid circulating in the first thermal regulation circuit is in contact with the wall delimiting the combustion chambers and makes it possible to thermally regulate the combustion chambers, or at least the wall participating in delimiting the combustion chambers.
  • the combustion chambers are intended to accommodate the combustion of a fuel and are thus subjected to high temperatures during operation of the heat engine, and the first thermal regulation circuit has the main function of thermally regulating the combustion chambers in order to prevent them from reaching a temperature increasing the risk of degradation of said combustion chambers.
  • the first thermal regulation circuit generally takes the form of a channel extending longitudinally between the longitudinal ends of the cylinder head through a wall of the casing, the first heat transfer fluid circulating in the channel of a longitudinal end of the cylinder head to the other.
  • the heat transfer fluid thus heated can then circulate towards a heat exchanger of a ventilation, heating and/or air conditioning system where it is intended to transfer calories to the air intended for the passenger compartment.
  • the heat transfer fluid thus cooled is driven again in circulation towards the first thermal regulation circuit in the cylinder head.
  • the second thermal regulation circuit is distinct from the first thermal regulation circuit, that is to say that within the cylinder head, the heat transfer fluids circulating through each of the thermal regulation circuits do not enter not in touch.
  • the first thermal regulation circuit and the second thermal regulation circuit are physically separated by a wall of the material making up the cylinder head.
  • the first thermal regulation circuit and the second thermal regulation circuit are thermally insulated from each other, that is to say that there is a limitation of the heat exchange between the heat transfer fluids circulating within each of the thermal regulation ducts.
  • the second thermal regulation circuit is configured to be connected to a heat exchanger at the level of which the second heat transfer fluid yields calories to the benefit of another fluid, which can for example be a flow of air circulating through a ventilation, heating and/or air conditioning system intended for a passenger compartment of the vehicle. It is understood here that the second heat transfer fluid thus participates in heating the passenger compartment, in particular from the calories originating from the exhaust gases.
  • the second heat transfer fluid captures calories from the exhaust gases flowing through the exhaust outlet, these calories being able to be captured as soon as the exhaust gases are produced, that is to say when the engine is started. internal combustion engine. It is understood from this that the second heat transfer fluid is able to heat the flow of air intended for the passenger compartment by circulating in the heat exchanger as soon as the vehicle is started, thus facilitating the immediate heating of the passenger compartment.
  • the cylinder head comprises several longitudinal walls, among which a longitudinal end wall participating in defining an envelope of the cylinder head and into which the exhaust outlet opens, the second thermal regulation circuit extending in the thickness of the longitudinal wall end.
  • the longitudinal end wall here corresponds to the wall of the casing through which the exhaust outlet extends, so that the exhaust outlet passes through said wall from the inside towards the outside of the cylinder head. end longitudinal.
  • the longitudinal end wall may in particular extend at least along a main extension dimension of the yoke.
  • the cylinder head comprises at least one heating inlet and one heating outlet intended to be fluidically connected to a heating system of a passenger compartment of the vehicle, the second thermal regulation circuit extending between the heating inlet and the heating outlet passing at least partly around the exhaust outlet of the cylinder head.
  • the second heat transfer fluid thus circulates through the second thermal regulation circuit from the heating inlet to the heating outlet, passing around the exhaust outlet of the cylinder head.
  • the second heat transfer fluid is capable of capturing the calories originating from the exhaust gases flowing through the exhaust outlet.
  • the arrangement of the second thermal regulation circuit around the exhaust outlet consequently optimizes the capture of calories by the second heat transfer fluid while tolerating a compactness of the cylinder head acceptable for automobile manufacturers.
  • the cylinder head comprises two side walls each extending in a plane secant to the main extension dimension of the cylinder head at one of the longitudinal ends of the longitudinal end wall, the heating inlet being disposed on the longitudinal end wall while the heating outlet is disposed on either of the side walls.
  • the side walls here correspond to the walls longitudinally delimiting the cylinder head, and advantageously extend in a plane substantially perpendicular to the main direction of extension of the cylinder head.
  • the second thermal regulation circuit comprises a first conduit and a second conduit extending in the thickness of the longitudinal end wall, the first conduit and the second conduit extending from the heating inlet to the heating outlet through the longitudinal end wall, the first conduit and the second conduit diverging locally passing on either side of the exhaust outlet.
  • the first duct and the second duct extend longitudinally between the heating inlet and the heating outlet on either side of the exhaust outlet, the ducts diverging each other to surround the exhaust outlet.
  • the ducts approach each other as they approach the heating inlet and/or the heating outlet from the exhaust outlet.
  • the first duct and/or the second duct extend mainly along the main direction of extension of the cylinder head.
  • the first duct and the second duct each comprise a spacer portion around the exhaust outlet, the spacer portions being offset vertically with respect to the heating outlet.
  • the heating outlet can be arranged above the spacing portions of the two ducts in the vertical direction. This particular arrangement allows in particular the gas present in the ducts, and/or the gas formed during the circulation of the second heat transfer fluid within the ducts to be able to circulate easily through the second thermal regulation circuit between the heating inlet and the outlet. heating to be evacuated from the second thermal control circuit through the heating output.
  • the heating inlet is offset vertically with respect to the spacer portion of at least the second conduit. More particularly, the heating inlet is arranged below the spacer portion of the second duct in the vertical direction. It is thus understood that the spacer portion is arranged vertically between the heating inlet and the heating outlet, promoting the circulation of fluids in the gaseous state from the heating inlet to the heating outlet.
  • a minimum dimension measured between the second thermal regulation circuit and the first thermal regulation circuit is at least two millimeters.
  • This minimum dimension may in particular be at least 5 mm. This particular dimension forms a good compromise between optimum compactness of the cylinder head carrying the two thermal regulation circuits and good thermal insulation.
  • the second thermal regulation circuit is offset transversely with respect to the first regulation circuit thermal. It is understood by “transversely” that the offset is assessed along a direction perpendicular to the main extension plane of the longitudinal wall.
  • the second thermal regulation circuit is configured to be fluidically connected to a pass of a heat exchanger of a ventilation, heating and/or air conditioning system of the vehicle, the fluid coolant circulating in the second thermal regulation circuit being capable of exchanging calories with another fluid circulating in a second pass of said heat exchanger.
  • the present invention also relates to a cylinder head assembly of an internal combustion engine comprising a cylinder head characterized according to any one of the preceding characteristics and a cylinder head cover participating in covering at least part of the internal volume of the cylinder head, the cylinder head cover participating in defining at least in part the first thermal regulation circuit.
  • the invention also relates to a thermal regulation system comprising a first thermal regulation loop, of which the first thermal regulation circuit is a constituent, and a second thermal regulation loop, of which the second thermal regulation circuit is constituent, the first thermal regulation comprising, outside the cylinder head, at least one pumping member configured to drive the first heat transfer fluid in circulation at least through the first thermal regulation loop and the second thermal regulation loop comprising, outside the cylinder head at least one pumping device configured to force the circulation of the second heat transfer fluid within the second thermal regulation loop, the thermal regulation system being configured to selectively cause the first heat transfer fluid and the second heat transfer fluid to circulate.
  • the first thermal regulation loop also comprises, outside the cylinder head, a first line and a second line each extending from one of the ends of the first thermal regulation circuit and to the other end of the first thermal regulation circuit, said ends of the first thermal regulation circuit being formed by a fluid inlet and a fluid outlet.
  • the bifurcation between the first line, the second line and the fluid outlet of the first thermal regulation circuit is made in a regulation box installed against one of the side walls of the envelope. arranged at the longitudinal ends of the cylinder head.
  • the first thermal regulation loop comprises a tank arranged on the first line and a heat exchanger installed on the second line.
  • the second thermal regulation loop also comprises, outside the cylinder head, a heating pipe extending between the heating outlet and the heating inlet of the cylinder head, the heat exchanger and the pumping device being installed on the heating pipe.
  • the thermal regulation system comprises a first return pipe and a second return pipe each extending between the two thermal regulation loops.
  • the first return pipe extends from the heating pipe as far as the pumping member arranged on the first thermal regulation loop and the second return pipe extends between the first thermal control circuit and the heating line.
  • the invention also relates to a method for thermal regulation of a cylinder head characterized according to any one of the preceding characteristics, comprising a start-up phase during which the second heat transfer fluid circulates through the second thermal regulation circuit by capturing calories coming from the gases flowing through the exhaust outlet to then yield them to another fluid, and a rolling phase during which the first fluid circulates through the first thermal regulation circuit by capturing calories from the at least one combustion chamber to then yield them to the other fluid.
  • variants of the invention may be associated with each other, in various combinations, insofar as they are not incompatible or exclusive with respect to each other.
  • variants of the invention may be imagined comprising only a selection of characteristics described below in isolation from the other characteristics described, if this selection of characteristics is sufficient to confer a technical advantage and/or to differentiate the invention. compared to the prior art.
  • a longitudinal direction corresponds to a main direction of elongation of the cylinder head, this longitudinal direction being parallel to a longitudinal axis L of an L, V, T illustrated in the figures.
  • a transverse direction corresponds to a direction along which an exhaust gas outlet of the cylinder head mainly extends, this transverse direction being parallel to a transverse axis T of the mark L, V, T and this transverse axis T being perpendicular to the longitudinal axis L.
  • a vertical direction corresponds to a direction parallel to a vertical axis V of the reference L, V, T, this vertical axis V being perpendicular to the longitudinal axis L and the transverse axis T.
  • upstream and downstream used in the remainder of the description refer to the direction of circulation of a cooling fluid and/or of a caloric fluid through the thermal regulation device.
  • a cylinder head assembly of a combustion engine of a motor vehicle comprising at least one cylinder head 1 and one cylinder head cover 2.
  • This cylinder head assembly is intended to be mounted on an engine block, and the cylinder head cover 2 and the cylinder head 1 are arranged one above the other vertically to form the cylinder head assembly arranged above the engine block, not shown here.
  • the cylinder head 1 and the cylinder head cover 2 define between them at least one zone for receiving a camshaft and the valves of the heat engine, not shown in all the figures.
  • the cylinder head assembly, and in fact the cylinder head 1 and the cylinder head cover 2 extend mainly along a direction of main elongation substantially parallel to the longitudinal direction L. More particularly this main dimension of the assembly cylinder head is parallel to the direction of elongation of the camshaft intended to be housed in the reception area provided between the cylinder head and the cylinder head cover.
  • Cylinder head 1 comprises an envelope 4 defining an internal volume of cylinder head 1, at least one combustion chamber 6 extending through the internal volume of cylinder head 1 and configured to receive a piston, and an exhaust outlet 8 s extending from the at least one combustion chamber 6 towards the outside of the cylinder head 1.
  • the cylinder head 1 globally takes on a parallelepipedic shape with several longitudinal walls 10 extending at least along the longitudinal direction L and extending more particularly mainly in a longitudinal and vertical plane.
  • the cylinder head 1 also comprises two side walls 12 each extending in a transverse and vertical plane, the longitudinal walls 10 of the casing 4 extending longitudinally between the side walls 12.
  • the side walls 12 are arranged at the ends longitudinal sections of the cylinder head 1, and the longitudinal walls extend longitudinally from one side wall to the other.
  • this longitudinal wall end 10 is specific in that the previously mentioned exhaust outlet 8 emerges through this longitudinal end wall 10.
  • the cylinder head 1 comprises several combustion chambers 6 extending partly in the internal volume defined at least partially by the casing 4. More particularly, the combustion chambers 6 are formed within the cylinder head and delimited by walls longitudinal sections helping to define the envelope.
  • the combustion chambers 6 are each intended to receive a piston, set in motion in particular by the camshaft between an injection position and an exhaust position.
  • the combustion chambers 6 are fluidly connected to the exhaust outlet 8, through which the exhaust gas formed during the combustion of a fuel in the combustion chambers 6 is evacuated.
  • the exhaust outlet 8 has the function of guiding the exhaust gas, a waste resulting from the combustion of the fuel, from the combustion chambers 6 towards the outside of the cylinder head 1 and of the engine block.
  • the exhaust outlet 8 extends through the longitudinal end wall 10, and a characteristic of the invention will subsequently be described according to which the cylinder head comprises a circuit of thermal regulation specifically formed within the cylinder head and in particular in this longitudinal end wall 10 to be as close as possible to the exhaust outlet 8.
  • the invention aims to protect the formation of a thermal regulation circuit specific as close as possible to the exhaust outlet and that without departing from the context of the invention, the exhaust outlet could open out into another wall, for example a side wall, since the specific thermal regulation circuit is then formed particularly in this other wall to be as close as possible to the exhaust outlet.
  • the cylinder head 1 comprises a first thermal regulation circuit 14 in which a first heat transfer fluid circulates and a second thermal regulation circuit 16 in which a second heat transfer fluid circulates, the second thermal regulation circuit 16 being distinct from the first thermal regulation circuit 14. It is understood that within the cylinder head 1, the first heat transfer fluid and the second heat transfer fluid are not in contact and do not mix.
  • the first heat transfer fluid and the second heat transfer fluid can be water, for example with the addition of ethylene glycol or propylene glycol.
  • the first heat transfer fluid and the second heat transfer fluid may have a different composition from each other or the same composition without thereby departing from the scope of the invention.
  • the first thermal regulation circuit 14 extends within the internal volume of the cylinder head, in several constituent walls of the casing 4 and participating in delimiting the at least one combustion chamber 6.
  • the first thermal regulation circuit is in particular formed by circulation channels of the first heat transfer fluid dug within the constituent walls.
  • the first thermal regulation circuit 14 extends in particular through a bottom wall 18 of the casing 4, namely a wall delimiting the cylinder head assembly facing the engine block, the bottom wall 18 corresponding to one of the longitudinal walls 10 but different from the longitudinal end wall 10 into which the exhaust outlet opens, the arrangement of the first thermal regulation circuit 14 through the longitudinal end wall 10 being particularly visible on the figure 6 .
  • the first heat transfer fluid circulating through the first thermal regulation circuit 14 is in this context intended to circulate along at least a part of each of the combustion chambers 6.
  • the first thermal regulation circuit 14 extends longitudinally between the two side walls 12 of the casing 4. Through this circulation, the first heat transfer fluid captures calories from each of the combustion chambers 6 and then evacuates them to a cooling system.
  • thermal regulation 38 arranged outside the cylinder head assembly and fluidly connected to the first thermal regulation circuit 14. In other words, the first heat transfer fluid contributes to cooling the combustion chambers 6 and thus avoiding the temperature rise of the burning 6.
  • the cylinder head 1 can be associated with a box 20 for regulating the circulation of the first heat transfer fluid, shown schematically in the figure 7 .
  • This regulation box 20 can be arranged on one or the other of the walls delimiting the casing 4 of the cylinder head and for example on one of the side walls 12.
  • one of the side walls 12 has on an outer face a space 22 for receiving the regulation box 20, the latter being installed against the outer face of the said side wall 12 and fixed to the cylinder head 1 by means known to the skilled in the art such as by screwing for example.
  • the cylinder head according to the invention is particular in that it comprises a second thermal regulation circuit 16 which is separate from the first thermal regulation circuit 14 and more particularly, it is notable that this second circuit thermal regulation 16 is arranged within a specific wall of the cylinder head so that the second heat transfer fluid which is intended to circulate in this second thermal regulation circuit 16 can effectively exchange calories with the gases circulating in the exhaust outlet 8.
  • the second thermal regulation circuit 16 is separate from the first thermal regulation circuit 14, that is to say that within the cylinder head 1, the heat transfer fluids circulating through each of the thermal regulation circuits n do not come into contact. A wall of the cylinder head participates in physically separating these two thermal regulation circuits.
  • the first thermal regulation circuit 14 and the second thermal regulation circuit 16 are thermally insulated from each other, that is to say that there is a limitation of the thermal exchanges between the heat transfer fluids circulating within each of the thermal regulation ducts.
  • first thermal regulation circuit 14 reduces the risk of heat exchange between the two heat transfer fluids, each of the fluids not having the same function within the cylinder head 1.
  • a minimum dimension measured between the second thermal regulation circuit 16 and the first thermal regulation circuit 14 is at least two millimeters.
  • this minimum dimension is at least 5 mm.
  • This dimension represents here a good compromise to obtain on the one hand an optimized compactness of the cylinder head 1 carrying the two thermal regulation circuits and on the other hand a good thermal insulation between the heat transfer fluids, thus avoiding thermal interactions and exchanges of calories from one heat transfer fluid to another.
  • This minimum difference is in particular made possible by a spatial configuration, within the cylinder head, of the two thermal regulation circuits, with the first thermal regulation circuit which extends within the cylinder head around the combustion chambers and the second circuit thermal regulation circuit which extends in the longitudinal end wall 10.
  • the second thermal regulation circuit 16 is thus offset as a whole, here transversely, with respect to the first thermal regulation circuit 14. that the offset is assessed along a direction perpendicular to the main extension plane of the longitudinal wall 10 in which the second thermal regulation circuit 16 extends. And it should be noted that this is the whole of the second thermal regulation circuit which is offset transversely, in being housed in the longitudinal end wall 10, with respect to the first thermal regulation circuit.
  • the second thermal regulation circuit 16 is configured to be connected to a heat exchanger 24 at the level of which the second heat transfer fluid transfers calories to the benefit of another fluid, which can for example be a flow of air circulating through a ventilation, heating and/or air conditioning system intended for a passenger compartment of the vehicle. It is understood here that the second heat transfer fluid thus participates in heating the passenger compartment thanks to the calories coming from the exhaust gases.
  • a thermal regulation system in the context of the invention can selectively cause the first heat transfer fluid or the second heat transfer fluid to circulate in the direction of a heat exchanger 24 outside the engine block and choose the heat transfer fluid to be circulated in depending on the condition of the vehicle.
  • the thermal regulation system favors the circulation of the second heat transfer fluid when the vehicle is started, so that the latter captures the calories coming from the exhaust gases circulating through the exhaust outlet 8 as soon as the combustion engine is started. internal.
  • the cylinder head 1 comprises in particular at least one heating inlet 26 and one heating outlet 28 intended to be fluidically connected to a heating system of a passenger compartment of the vehicle, the second thermal regulation circuit 16 extending between the heating inlet 26 and the heating outlet 28 passing at least partly around the exhaust outlet 8 of the cylinder head 1.
  • the second heat transfer fluid thus circulates through the second thermal regulation circuit 16 from the inlet of heater 26 to heater outlet 28 passing around exhaust outlet 8 of cylinder head 1.
  • the heating inlet 26 is arranged on the longitudinal end wall 10, namely the wall into which the exhaust outlet 8 opens, while the heating outlet 28 is arranged on one or other of the side walls 12.
  • This particular arrangement also makes it possible to facilitate the mounting of the cylinder head 1 on a vehicle, thus facilitating the necessary connections with the various systems through which the first and/or the second heat transfer fluid circulates.
  • a cylinder head 1 whose heating inlet 26 and/or heating outlet 28 would be arranged on a wall other than those which have just been mentioned would not thereby depart from the context of the invention.
  • the second thermal regulation circuit 16 comprises a first conduit 30 and a second conduit 32 extending in the thickness of the longitudinal end wall 10 mainly along the main direction of extension of the cylinder head 1, i.e. along the longitudinal direction L, as seen in the figure 5 .
  • the first conduit 30 and the second conduit 32 extend from the heating inlet 26 to the heating outlet 28 through the longitudinal end wall 10, the first conduit 30 and the second conduit 32 diverging locally from each other to pass on either side of the exhaust outlet 8. It is understood that the first conduit 30 and the second conduit 32 both lead on the one hand to the heating inlet 26 and on the other hand on the heating outlet 28. In this configuration, the second heat transfer fluid circulates in one and the other of the conduits.
  • each of the ducts 30, 32 of this second thermal regulation circuit 16 distal portions 34 which extend directly in the extension of the heating inlet 26 or of the heating outlet 28 and which are directed towards the exhaust outlet 8, and a spacer portion 36 which extends between two distal portions in the zone of the exhaust outlet 8.
  • the distal portions 34 of each of the ducts extend along of the corresponding distal portion 34 of the other duct, while the spacing portion 36 of each of the ducts extends away from then approaching the other spacing portion 36 of the other duct of so as to frame at least partially around the exhaust outlet 8.
  • conduits 30, 32 approach each other as they approach the heating inlet 26 and/or the heating outlet 28 from the exit zone of exhaust 8.
  • a diagram of the circulation of fluids is particularly visible on the picture 3 , which is a representation of the thermal regulation circuits 14, 16 identified by the heat transfer fluid circulating within these circuits without the walls 10 delimiting these circuits being visible here. It is more particularly visible that the second circuit 16 is independent of the first circuit 14, that is to say that there is no fluid communication between the first circuit 14 and the second circuit 16 within the cylinder head 1, the second circuit 16 being offset transversely with respect to the first circuit 14.
  • first conduit 30 extends partly above the exhaust outlet 8 and the second conduit 32 extends partly below the exhaust outlet 8.
  • the spacing portions 36 of the two conduits 30, 32 of this second thermal regulation circuit 16 are offset vertically with respect to the heating outlet 28. More particularly, the heating outlet 28 is arranged above the spacing portions 36 of the two ducts 30, 32 in the vertical direction V.
  • This particular arrangement allows in particular the gas present in the ducts 30, 32 and/or the gas formed during the circulation of the second heat transfer fluid within conduits 30, 32 to be able to circulate easily through the second thermal regulation circuit 16 between the heating inlet 26 and the heating outlet 28 in order to be evacuated from the second thermal regulation circuit 16 through the heating outlet 28 .
  • the heating inlet 26 is offset vertically with respect to the spacer portion 36 of at least the second conduit 32. More particularly, the heating inlet 26 is arranged below the portion of spacing 36 of the second conduit 32 in the vertical direction V. It is thus understood that the spacing portion 36 is arranged vertically between the heating inlet 26 and the heating outlet 28, promoting the circulation of fluids in the gaseous state from heating input 26 to heating output 28.
  • FIG 7 represents a general diagram of a thermal regulation system 38 comprising the first thermal regulation circuit 14 and the second thermal regulation circuit 16, and the circulation of the first heat transfer fluid and of the second heat transfer fluid within such a system.
  • the thermal regulation system 38 here comprises a first thermal regulation loop 40 of which the first thermal regulation circuit 14 is constituent and a second thermal regulation loop 42 of which the second thermal regulation circuit 16 is constituent.
  • the first thermal regulation loop 40 comprises, in addition to the first thermal regulation circuit 14, a first line 44 and a second line 46 each extending from one of the ends of the first thermal regulation circuit 14 and up to the other end of the first thermal regulation circuit 14. It is understood here that the first thermal regulation circuit 14 has a fluid inlet 48 and a fluid outlet 50 representing the ends of the first thermal regulation circuit 14 mentioned above.
  • the junction between the first line 44, the second line 46 and the The fluid outlet 50 of the first thermal regulation circuit 14 is in particular made in the regulation box 20 installed against one of the side walls 12 of the casing 4.
  • the first thermal regulation loop 40 comprises a reservoir 52 arranged on the first line 44, a heat exchanger 54 installed on the second line 46 and a pumping device 56 arranged at the fluid inlet 48 of the first thermal regulation circuit 14
  • the pumping member 56 drives the first heat transfer fluid in circulation at least through the first thermal regulation loop 40.
  • the pumping member 56 here forces the circulation of the first heat transfer fluid through the first thermal regulation circuit 14, then through the first line 44 and the second line 46, until it returns to the pump unit 56.
  • the first heat transfer fluid When the first heat transfer fluid circulates through the first thermal regulation circuit 14, within the cylinder head, it captures the calories released by the combustion chambers 6, cooling them on the way, to then transport them to the tank 52 installed on the first line 44 and/or to the heat exchanger 54 installed on the second line 46. By circulating through the heat exchanger 54, the first heat transfer fluid yields calories to the benefit of another fluid circulating through the heat exchanger 54, a temperature of the first heat transfer fluid flowing downstream of the heat exchanger 54 being lower than a temperature of the first heat transfer fluid flowing upstream of the heat exchanger 54. In this configuration, the first heat transfer fluid can maintain the combustion chambers 6 at a desired temperature to prevent overheating and damage to the components of the cylinder head 1.
  • the second thermal regulation loop 42 comprises, in addition to the second thermal regulation circuit 16, a heating pipe 60 extending between the heating outlet 28 and the heating inlet 26, the heat exchanger 24 as mentioned previously and a pumping device 62 installed on the heating pipe 60.
  • the heat exchanger 24 also constitutes a ventilation, heating and/or air conditioning system not shown in all the figures, and is configured to be crossed on the one hand by the second heat transfer fluid and on the other hand by another fluid, such as an air flow. It is thus understood that the second heat transfer fluid yields calories recovered during its circulation through the second thermal regulation circuit 16 for the benefit of the other fluid, the second heat transfer fluid thus heating the other fluid.
  • this thermal regulation is particularly useful when starting the vehicle to heat a flow of air in the direction of the passenger compartment of the vehicle, in particular when one of the only usable thermal sources is that originating from the exhaust gases circulating in the exhaust outlet 8.
  • the pumping device 62 here forces the circulation of the second heat transfer fluid within the second thermal regulation loop 42, that is to say through the second thermal regulation circuit 16 and the heating pipe 60.
  • the device pumping device 62 is here installed between the heat exchanger 24 and the heating inlet, but a second thermal regulation loop 42 whose pumping device 62 would be arranged between other elements of said loop would not go beyond the scope of the 'invention.
  • the thermal regulation system 38 comprises a first return pipe 64 and a second return pipe 66 each extending between the two thermal regulation loops 40, 42. It will be understood that in the example shown here, the first heat transfer fluid and the second heat transfer fluid have the same composition so that each of the fluids can mix with the other fluid.
  • the first return pipe 64 extends from the heating pipe 60 to the pumping unit 56 arranged on the first thermal regulation loop 40.
  • a bifurcation between the first return pipe 64 and the heater 60 is arranged between the heat exchanger 24 and the pumping device 62.
  • the thermal regulation system 38 comprises a flow control valve 68 capable of being positioned at least in an open position authorizing the circulation of second heat transfer fluid through the first return pipe 64 from the second thermal regulation loop 42 to the first thermal regulation loop 40, and a closed position blocking the circulation of the second heat transfer fluid through the first return pipe 64.
  • the second return pipe 66 extends for its part between the first thermal regulation circuit 14 and the heating pipe 60. More precisely, a first intersection between the second return pipe 66 and the first thermal regulation circuit 14 is arranged downstream of the pumping device 56, while a second intersection between the second return pipe 66 and the heating pipe 60 is arranged on the heating pipe 60 between the pumping device 62 and the heating inlet 26 In this arrangement, the first heat transfer fluid can circulate from the first thermal regulation loop 40 to the second thermal regulation loop 42.
  • the thermal regulation system 38 further comprises a first non-return valve 70 disposed on the second return pipe 66 and a second non-return valve 72 disposed on the heating pipe 60 between the pumping device 62 and the second intersection between the second return pipe 66 and the heating pipe 60.
  • These non-return valves 70, 72 make it possible here to ensure circulation of the heat transfer fluid in the correct direction of circulation. More particularly, the first non-return valve 70 prevents the heat transfer fluid from circulating in the second return pipe 66 from the heating pipe 60 towards the first thermal regulation loop 40, the second non-return valve 72 preventing the heat transfer fluid from circulate in the heating pipe 60 from the heating inlet to the pumping device 62.
  • the invention also relates to a method for thermal regulation of the cylinder head 1 comprising two distinct phases, among which a vehicle start-up phase and a vehicle rolling phase.
  • a vehicle start-up phase and a vehicle rolling phase.
  • heat transfer fluid flows have been represented schematically to illustrate the start-up phase while the rolling phase is illustrated on the figure 8 .
  • the heat exchanger 24 is crossed by the second heat transfer fluid which circulates through the second thermal regulation circuit 16, in particular by capturing calories from the gases circulating through the exhaust outlet 8 to then transfer them to another fluid in the heat exchanger 24, and the first fluid circulates in a loop through the first thermal regulation circuit 14 without carrying out an exchange of calories through a heat exchanger in order to be able to raise the temperature and allow a rise in appropriate operating temperature of the combustion chambers.
  • the first fluid circulating through the first thermal regulation circuit 14 by capturing calories from the at least one combustion 6 is directed to a heat exchanger outside the engine block to subsequently transfer these calories to another fluid via one or more heat exchangers.
  • the second fluid is circulated by the pumping device 62 through the second thermal regulation loop 42.
  • the flow control valve 68 is in the closed position, blocking the circulation of the second heat transfer fluid towards the first thermal regulation loop. thermal regulation 40 through the first return line 64.
  • the second heat transfer fluid By circulating through the second thermal regulation circuit 16, the second heat transfer fluid is heated in contact with the exhaust outlet 8, then in turn heats the other fluid in the heat exchanger 24, which can for example be a flow of air intended to circulate towards the passenger compartment of the vehicle.
  • the pumping member 56 is stopped, the first heat transfer fluid not forcing the circulation of said first heat transfer fluid through the first thermal regulation loop 40.
  • the pumping device 62 no longer forces the circulation of the second fluid through the second regulation loop while the pumping member 56 forces the circulation of the first heat transfer fluid through the first thermal regulation loop 40.
  • the flow control valve 68 is in the open position, thus allowing the second heat transfer fluid to circulate from the second thermal regulation loop 42 to the first thermal regulation loop 40 through the first return pipe 64 , as schematically illustrated in the figure 8 by double black arrows.
  • the circulation of the first heat transfer fluid through the first thermal regulation loop 40 causes the circulation of said first heat transfer fluid through the second return pipe 66 from the first thermal regulation loop 40 to the second thermal regulation loop 42.
  • the invention mainly relates to a cylinder head 1 comprising two thermal regulation circuits separate from each other in the cylinder head 1 and respectively traversed by heat transfer fluid, with one of the thermal regulation circuits which is specifically made in the thickness of a wall of the cylinder head through which an exhaust gas outlet passes, so that the coolant circulating in this specifically made circuit can be heated by the heat of the exhaust gas produced .
  • This structural characteristic makes it possible to be able to heat the passenger compartment of a vehicle as soon as said vehicle is started without having to wait for the heating of the components of cylinder head 1.

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)
EP22210467.1A 2021-12-14 2022-11-30 Zylinderkopf einer brennkraftmaschine Pending EP4198290A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2113480A FR3130326A1 (fr) 2021-12-14 2021-12-14 Culasse d’un moteur à combustion interne.

Publications (1)

Publication Number Publication Date
EP4198290A1 true EP4198290A1 (de) 2023-06-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22210467.1A Pending EP4198290A1 (de) 2021-12-14 2022-11-30 Zylinderkopf einer brennkraftmaschine

Country Status (2)

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EP (1) EP4198290A1 (de)
FR (1) FR3130326A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT500442A2 (de) * 2005-07-19 2005-12-15 Avl List Gmbh Zylinderkopf für eine brennkraftmaschine
DE202005010446U1 (de) * 2005-06-30 2006-11-09 Mann + Hummel Gmbh Zylinderkopfhaube
FR2936014A1 (fr) * 2008-09-18 2010-03-19 Peugeot Citroen Automobiles Sa Culasse de moteur a combustion integrant un collecteur d'echappement.
WO2014016177A1 (de) * 2012-07-26 2014-01-30 Avl List Gmbh Flüssigkühlsystem für eine brennkraftmaschine eines fahrzeuges
DE102013221215A1 (de) * 2012-10-19 2014-04-24 Honda Motor Co., Ltd. Wassermantelstruktur von Zylinderkopf
WO2019036738A1 (de) * 2017-08-21 2019-02-28 Avl List Gmbh Zylinderkopf

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202005010446U1 (de) * 2005-06-30 2006-11-09 Mann + Hummel Gmbh Zylinderkopfhaube
AT500442A2 (de) * 2005-07-19 2005-12-15 Avl List Gmbh Zylinderkopf für eine brennkraftmaschine
FR2936014A1 (fr) * 2008-09-18 2010-03-19 Peugeot Citroen Automobiles Sa Culasse de moteur a combustion integrant un collecteur d'echappement.
WO2014016177A1 (de) * 2012-07-26 2014-01-30 Avl List Gmbh Flüssigkühlsystem für eine brennkraftmaschine eines fahrzeuges
DE102013221215A1 (de) * 2012-10-19 2014-04-24 Honda Motor Co., Ltd. Wassermantelstruktur von Zylinderkopf
WO2019036738A1 (de) * 2017-08-21 2019-02-28 Avl List Gmbh Zylinderkopf

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