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
  • F01P7/00—Controlling of coolant flow
  • F01P7/14—Controlling of coolant flow the coolant being liquid
  • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
  • F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
• • 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
  • F01P3/12—Arrangements for cooling other engine or machine parts
  • F01P3/14—Arrangements for cooling other engine or machine parts for cooling intake or exhaust valves
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B75/00—Other engines
  • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
• • 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
  • F02F1/16—Cylinder liners of wet type
• • 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
• • 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
  • F02F1/38—Cylinder heads having cooling means for liquid cooling the cylinder heads being of overhead valve type
• • 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
  • F01P2060/02—Intercooler
• • 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
  • F02F1/242—Arrangement of spark plugs or injectors

Definitions

• the invention relates to an internal combustion engine, in particular a large diesel engine, having at least one individual cylinder with a cylinder housing receiving a cylinder housing, and with at least one single cylinder head, wherein the cylinder liner is surrounded by at least one cooling jacket, which with at least one cooling space, is fluidly connected in the single cylinder head, the cylinder liner is surrounded by a first and a second cooling jacket, wherein the first cooling jacket is fluidly separated from the second cooling jacket within the cylinder housing.
• a similar cooling system with a first cooling circuit for cooling the cylinder head and a second cooling circuit for cooling the cylinder block is known from EP 1 035 306 A2.
• DE 10 2004 024 289 A1 describes a cooling system for a vehicle with a high-temperature circuit and a low-temperature circuit.
• the high-temperature circuit is provided for cooling the internal combustion engine
• the low-temperature circuit is used for cooling a charge air cooler and possibly an oil cooler.
• JP 06-60745 U discloses an internal combustion engine having at least one cylinder with a cylinder housing receiving a cylinder housing, and with a cylinder head, wherein the cylinder liner is surrounded by a first and a second cooling jacket, wherein the first cooling jacket is fluidly connected to a cooling chamber in the cylinder head. The first cooling jacket is fluidly separated from the second cooling jacket within the cylinder housing.
• Similar internal combustion engines are also known from JP 55-057614 A or JP 58-65927 A.
• the object of the invention is to improve the heat dissipation in the area of the fire deck and the cylinder liner for large engines.
• this is achieved in that the first cooling jacket with at least a first cooling space and the second cooling jacket with at least one second cooling space in the single cylinder head is fluidly connected.
• the first cooling jacket is flow-connected via at least one, preferably annular, first flow passage within the cylinder housing with at least one, preferably annular, first cooling channel surrounding the land section of the cylinder liner.
• the first cooling channel is preferably at least partially, preferably predominantly, disposed between the first cooling jacket and the single cylinder head.
• the first cooling channel is flow-connected via at least one first transfer opening between the cylinder housing and the single cylinder head with the first cooling chamber in the single cylinder head.
• the first cooling jacket may be partially formed by the cylinder housing surrounding the cylinder housing, partially by the cylinder liner itself, wherein preferably the second cooling jacket is formed by the single cylinder housing.
• a particularly good cooling of the Feuerstegring Schemees results further when the second cooling jacket surrounds the first cooling channel substantially.
• the second cooling jacket is flow-connected to at least one second cooling space in the single cylinder head via at least one preferably annular second overflow opening between cylinder housing and single cylinder head.
• the second cooling dream preferably has at least one annular second cooling passage surrounding a valve seat ring and at least one axial connecting passage adjacent to a central component opening into the combustion chamber, preferably an injector, and radial connecting passages between the second and third cooling passages and leading to the second cooling passages or axial connecting passages radial connection holes in the fire deck of the single cylinder head, wherein preferably the components of the second cooling chamber, at least predominantly in a normal plane to the cylinder axis in the fire deck of the single cylinder head are arranged.
• the axial connection channel is flow-connected with at least one partial cooling space arranged between the first and second cooling chambers in the single cylinder head, which preferably surrounds at least one inlet and / or outlet channel, wherein the partial cooling space is separated from the first cooling water space by an intermediate deck, and wherein the partial cooling space is flow-connected to the first cooling water space via at least one second flow transition in the intermediate deck.
• annular gap is formed between the intermediate deck and the central component, or a sleeve receiving the central component, wherein an annular diaphragm is arranged in the annular gap, wherein preferably the annular aperture is firmly connected to the sleeve.
• the panel may be formed as a metal or plastic panel.
• the cooling system with the two cooling circuits is thus integrated into the castings of the cylinder housing or the single cylinder head.
• the two cooling circuits can be operated at the same temperature.
• the two cooling circuits have different temperature levels, wherein the first cooling circuit is designed as a high-temperature circuit and the second cooling circuit as a low-temperature circuit, wherein the low-temperature circuit has a lower temperature level than the high-temperature circuit.
• the high-temperature circuit is formed by the first cooling circuit, which has an inlet temperature in the first coolant jacket of about 85 ° C.
• the coolant flows around the cylinder liner in the upper region, in order to effect the cooling of the Feuerstegring Schemees and the piston ring portion in the region of the first Kolbenringnut sufficiently, and then flows through the first transfer opening in the first cooling chamber of the single cylinder head.
• the second cooling circuit forms the low-temperature circuit, which is temperature-controlled so that the inlet temperature in the second cooling jacket is approximately at 50 ° to 70 ° C.
• the coolant flows through the fire deck in the single cylinder head in a normal plane arranged substantially normal to the cylinder axis.
• the cooling holes and cooling channels are arranged very close to the combustion chamber roof of the single cylinder head and also supply the valve seat rings of the intake and exhaust valves with coolant. The flow is directed to the center of the single cylinder head, is deflected in the injector sleeve by means of a diaphragm and then flows through the lower part of the cooling chamber of the single cylinder head in the opposite direction to the connecting holes radially outward.
• the flows of the first cooling circuit and the second cooling circuit are brought together in a targeted manner in the region of the upper first cooling space and then exit together from the cylinder head at the opening to the water collecting line.
• the coolant of the second cooling circuit can be removed from the first cooling circuit.
• FIG. 1 shows an internal combustion engine according to the invention in a longitudinal section in a first embodiment
• FIG. 2 shows this internal combustion engine in a meridian section
• FIG. 3 shows an internal combustion engine according to the invention in a second embodiment in a meridian section
• Fig. 4 shows this internal combustion engine in a section along the line IV-IV in Fig. 3;
• Fig. 5 shows this internal combustion engine in a section along the line V-V in
• Fig. 6 the cooling system of the internal combustion engine according to the invention.
• the internal combustion engine has a plurality of individual cylinders 1, each individual cylinder 1 having a cylinder housing 2 and a cylinder liner 3.
• the cylinder housing 2 is closed by a single cylinder head 4 upwards.
• the cylinder liner 3 is surrounded by a first cooling jacket 5 and a second cooling jacket 6, wherein the first cooling jacket 5 and second cooling jacket 6 belong to different cooling circuits 31, 32 and are separated within the cylinder housing 2, so that the cooling media are supplied separately to the single cylinder head 4.
• the first cooling jacket 5 starts from a first supply channel 5a of the first cooling circuit 31, the second cooling jacket 6 from a second supply channel 6a of the second cooling circuit 32.
• the first cooling jacket 5 surrounds the cylinder liner 3 and is connected via an annular first flow transition 7 with an annular first cooling channel 8 and tangential Einfräsungen 9 or radial blind holes or radial through holes in the cylinder liner 3 for cooling the Feuerstegring Schemees 10 in flow communication.
• annular first cooling channel 8 From the annular first cooling channel 8 is a transition channel 11 goes out, which via a first transfer opening 12 and a substantially parallel to the cylinder axis la formed riser 13 opens into the first cooling chamber 14.
• the annular first channel region 8 is surrounded by the second cooling jacket 6, which is formed in the cylinder housing 2.
• the second cooling jacket 6 is flow-connected via a second transfer passage 15 and at least one, for example, annular second transfer opening 16 between the cylinder housing 2 and the single cylinder head 4, as well as radial first connecting bores 17 with annular second cooling channels 18 for cooling the valve seat rings 43.
• the second cooling channels 18 are connected via radial connecting channels 19 with at least one axial connecting channel 20, which is arranged in the direction of the cylinder axis la adjacent to a sleeve 21 for receiving a central component, for example an injection nozzle. Furthermore, the second cooling jacket 6 is connected via radial second connecting bores 22 with at least one axial connecting channel 20.
• the second cooling channels 18 and the first and second connecting bores ments 17 and 22 are arranged substantially in a normal plane ⁇ in the fire deck 23 of the single cylinder head 4 and form together with the axial connecting channels 20 from the second cooling circuit 32 fed second cooling chamber 24.
• the axial connecting channels 20 are connected to a lower partial cooling space 25, which is separated from the overlying first cooling space 14 by an intermediate deck 26.
• the partial cooling space 25 communicates with the first cooling space 14 via a second flow passage 27.
• the axial and radial connecting channels 19, 20 are preferably formed by bores.
• annular gap 28 is formed, in which an annular aperture 29 is inserted from metal or plastic.
• the panel 29 may be fixed to the sleeve 21, for example, welded or glued.
• FIG. 6 schematically shows the coolant system 30 of the internal combustion engine.
• the coolant system 30 has a first cooling circuit 31 and a second cooling circuit 32, the first cooling circuit 31 being designed as a high-temperature circuit HT and the second cooling circuit 32 as a low-temperature circuit NT.
• a first coolant pump 33 in the second cooling circuit 32, a second coolant pump 34 is arranged in the first cooling circuit 31, a first coolant pump 33, in the second cooling circuit 32.
• the coolant of the first cooling circuit 31 flows from the first coolant pump 33 to a first charge air cooler 35 designed as a high-temperature charge air cooler and passes from it into the first cooling jacket 5 of the cylinder housing 2.
• the coolant of the second cooling circuit 32 is discharged from the second coolant pump 34 as Never - Conveyed the temperature of the intercooler second charge air cooler 36, from which it is supplied via the oil cooler 37 to the second cooling jacket 6.
• the coolant flows through the cooling chambers of the cylinder housing 2 and the single cylinder head 4 in the manner described above, with the flows of the two cooling circuits 31, 32 unite in the single cylinder head 4 and leave the single cylinder head 4 via a common coolant manifold 38. Via a thermostatic valve 39, the coolant passes into a central system cooler 40. Downstream of the system cooler 40, the coolant flows are divided into the two partial flows of the first cooling circuit 31 and the second cooling circuit 32.
• the cooling circuit 31 is operated at about 85 ° C (inlet temperature in the first cooling jacket 5), wherein the coolant flows around the cylinder liner 3 in the upper region around the Feuerstegring Scheme 10 and in the region of the first groove 9 of the Cool enough piston ring area. Thereafter, the coolant of the first cooling circuit 31 flows into the single cylinder head 4 in the region of the first transfer opening 12.
• the second cooling circuit 32 is temperature controlled so that the inlet temperature in the second cooling jacket 6 in the range between 50 ° C to 70 ° C.
• the coolant of the second cooling circuit 32 flows through the fire deck 23 of the single cylinder head 4 substantially in a normal plane ⁇ to the cylinder axis la.
• the second cooling channels 18 and distributor bores 17 and 22 are arranged in the region of a normal plane ⁇ on the cylinder axis la near the combustion chamber roof of the single cylinder head 4 and cool the valve seat rings 43 of the inlet and outlet valves.
• the flow is directed radially in the direction of the center of the single cylinder head 4, is deflected in the region of the sleeve 21 by means of the diaphragm 29 and flows through the lower part of the cooling chamber 25 in opposite directions to the manifold bores 17 and 22.
• the flows of the first and second cooling circuits 31, 32 are targeted merged in the region of the upper first cooling chamber 14 and then pass together through the manifold 38 from the single cylinder head 4.
• the second cooling circuit 32 can branch off from the low-temperature cooling circuit NT before it enters the second coolant jacket 6.
• By arranging the mixing valve 41 between the first and second cooling circuits 31, 32 admixing of both cooling circuits 31, 32 is made possible. For example, with a cold engine or idling, hot water from the high-temperature circuit HT may be mixed into the low-temperature circuit NT.
• the mixing valve 41 and the control valve 42 can be controlled depending on temperature.

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• 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)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=48670556

Family Applications (1)

Country Status (5)

Cited By (6)

Families Citing this family (14)

Citations (5)

Family Cites Families (15)

• 2012
  • 2012-06-26 AT ATA50248/2012A patent/AT513053B1/de active
• 2013
  • 2013-06-19 US US14/410,721 patent/US9874133B2/en active Active
  • 2013-06-19 DE DE112013003196.5T patent/DE112013003196B4/de active Active
  • 2013-06-19 JP JP2015518984A patent/JP2015521716A/ja active Pending
  • 2013-06-19 WO PCT/EP2013/062804 patent/WO2014001181A1/de not_active Ceased
• 2018
  • 2018-06-27 JP JP2018122331A patent/JP2018145971A/ja active Pending

Patent Citations (5)

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