FI124930B - The piston cooling arrangement - Google Patents

The piston cooling arrangement Download PDF

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Publication number
FI124930B
FI124930B FI20125167A FI20125167A FI124930B FI 124930 B FI124930 B FI 124930B FI 20125167 A FI20125167 A FI 20125167A FI 20125167 A FI20125167 A FI 20125167A FI 124930 B FI124930 B FI 124930B
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FI
Finland
Prior art keywords
piston
cooling
injector
oil
cooling medium
Prior art date
Application number
FI20125167A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI20125167A (en
Inventor
Hannu Nurmi
Jorma Kuitunen
Original Assignee
Wärtsilä Finland Oy
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 Wärtsilä Finland Oy filed Critical Wärtsilä Finland Oy
Priority to FI20125167A priority Critical patent/FI124930B/en
Priority to CN201380008062.0A priority patent/CN104126068B/en
Priority to PCT/FI2013/050158 priority patent/WO2013121105A1/en
Priority to BR112014018952-8A priority patent/BR112014018952B1/en
Priority to KR1020147023469A priority patent/KR102065800B1/en
Priority to EP13712819.5A priority patent/EP2820277B1/en
Publication of FI20125167A publication Critical patent/FI20125167A/en
Application granted granted Critical
Publication of FI124930B publication Critical patent/FI124930B/en

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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
    • F02F3/00—Pistons 
    • F02F3/16—Pistons  having cooling means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
    • 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
    • F01P3/06—Arrangements for cooling pistons
    • 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
    • F01P3/06—Arrangements for cooling pistons
    • F01P3/10—Cooling by flow of coolant through pistons
    • 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 
    • F02F1/004—Cylinder liners
    • 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
    • F02F3/00—Pistons 
    • F02F3/16—Pistons  having cooling means
    • F02F3/20—Pistons  having cooling means the means being a fluid flowing through or along piston
    • F02F3/22—Pistons  having cooling means the means being a fluid flowing through or along piston the fluid being liquid
    • 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
    • F02F3/00—Pistons 
    • F02F3/16—Pistons  having cooling means
    • F02F3/20—Pistons  having cooling means the means being a fluid flowing through or along piston
    • F02F3/22—Pistons  having cooling means the means being a fluid flowing through or along piston the fluid being liquid
    • F02F3/225—Pistons  having cooling means the means being a fluid flowing through or along piston the fluid being liquid the liquid being directed into blind holes

Description

Piston cooling arrangement Technical field of the inventionPiston cooling arrangement Technical field of invention

The present invention relates to a cooling arrangement for a reciprocating piston of an internal combustion engine according to the preamble of claim 1.The present invention relates to a cooling arrangement for a reciprocating piston of an internal combustion engine according to the preamble of claim 1.

Background of the inventionBackground of the invention

Piston cooling in large medium speed engines is typically arranged through drillings in the crankshaft, connecting rods and gudgeon pins. In high speed engines, piston cooling is often implemented by utilizing oil jets. Jet cooling is advantageous also in medium speed engines, since it omits the need for oil drillings in the crank gear components and allows thus higher loading and lower manufacturing costs. In a typical jet cooling arrangement, the cooling arrangement is provided with a separate oil system for piston cooling. Oil injection nozzles for spraying the cooling oil are arranged inside the engine block. Through the injection nozzles, the oil is sprayed onto the bottom side of each piston. The piston skirt is provided with a space for receiving the oil. Drillings from the oil receiving space lead into a piston crown cooling gallery. A drawback of the present piston cooling arrangements is that the spraying distance is relatively long, which has an adverse effect on the functioning of the cooling system. The cooling arrangements may also be challenging to implement, since the space inside the engine block and especially below the cylinders is limited because of the moving connecting rods and counterweights. JP 2008232033 A discloses a cooling arrangement for a piston of an internal combustion engine. The arrangement comprises a cooling oil gallery that is arranged inside the piston crown and a nozzle hole in the wall of the cylinder liner for injecting cooling oil into the cooling oil gallery. GB 152143 A discloses a lubricating arrangement for a piston of an internal combustion engine. Lubricating oil is introduced onto the outer surface of the piston via a vertical oil channel that is inside the wall of the cylinder. DE 2135896 AI discloses a cooling arrangement for a piston of an internal combustion engine. Cooling oil is introduced into the piston via a cooling oil channel that is arranged vertically inside a cylinder liner.Piston cooling in large medium speed engines is typically arranged through drillings in the crankshaft, connecting rods and gudgeon Pins. In high speed engines, piston cooling is often implemented by utilizing oil jets. Jet cooling is advantageous also in medium speed engines, since it owns the need for oil drillings in crank gear components and allows for higher loading and lower manufacturing costs. In a typical jet cooling arrangement, the cooling arrangement is provided with a separate oil system for piston cooling. Oil injection nozzles for spraying the cooling oil are arranged inside the engine block. Through the injection nozzles, the oil is sprayed onto the bottom side of each piston. The piston skirt is provided with a space for receiving the oil. Drillings from oil receiving space lead into a piston crown cooling gallery. The drawback of the present piston cooling arrangements is that the spraying distance is relatively long, which has an adverse effect on the functioning of the cooling system. The cooling arrangements can also be challenging to implement since the space inside the engine block and especially below the cylinders is limited because of the moving connecting rods and counterweights. JP 2008232033 A discloses a cooling arrangement for a piston of an internal combustion engine. The arrangement consists of a cooling oil gallery that is arranged inside the piston crown and a nozzle hole in the wall of the cylinder liner for injecting cooling oil into the cooling oil gallery. GB 152143 discloses a lubricating arrangement for a piston of an internal combustion engine. Lubricating oil is introduced onto the outer surface of the piston via a vertical oil channel that is inside the wall of the cylinder. DE 2135896 AI discloses a cooling arrangement for a piston of an internal combustion engine. Cooling oil is introduced into the piston via a cooling oil channel that is arranged vertically inside a cylinder liner.

Summary of the inventionSummary of the invention

The object of the present invention is to provide an improved cooling arrangement for a reciprocating piston of an internal combustion engine. The piston is arranged inside a cylinder liner of the engine and comprises a piston crown and a piston skirt. The characterizing features of the piston cooling arrangement according to the present invention are given in the characterizing part of claim 1.The object of the present invention is to provide an improved cooling arrangement for a reciprocating piston of an internal combustion engine. The piston is arranged inside a cylinder liner of the engine and comprises a piston crown and a piston skirt. The characterizing features of the piston cooling arrangement according to the present invention are given in the characterizing features of claim 1.

The cooling arrangement according to the invention comprises a cooling oil gallery that is arranged at least partly inside the piston crown, a cooling medium injector for injecting cooling oil into a space between the piston and the cylinder liner below the piston crown, an opening that is arranged on the bottom surface of the cooling oil gallery for introducing the cooling oil from the space below the piston crown into the cooling oil gallery, and a cooling medium duct for supplying the cooling oil to the cooling medium injector. The cooling medium injector is arranged inside the cylinder at such a height that the tip of the cooling medium injector is above the center axis of the gudgeon pin of the piston when the piston is at bottom dead center.The cooling arrangement according to the invention comprises a cooling oil gallery that is arranged at least partially inside the piston crown, a cooling medium injector for injecting cooling oil into the space between the piston and the cylinder liner below the piston crown, an opening that is arranged on the bottom surface of the cooling oil gallery for introducing the cooling oil from the space below the piston crown into the cooling oil gallery, and a cooling medium duct for supplying the cooling oil to the cooling medium injector. The cooling medium injector is arranged inside the cylinder at such a height that the tip of the cooling medium injector is above the center axis of the gudgeon pin of the piston when the piston is at the bottom dead center.

Since the cooling medium injector is arranged close to the bottom surface of the cooling oil gallery, the spraying distance is short and the cooling effect of the cooling oil is improved.Since the cooling medium injector is arranged close to the bottom surface of the cooling oil gallery, the spraying distance is short and the cooling effect of the cooling oil is improved.

According to an embodiment of the invention, the tip of the injector is above the whole gudgeon pin when the piston is at bottom dead center.According to an embodiment of the invention, the tip of the injector is above the whole gudgeon pin when the piston is at the bottom dead center.

According to another embodiment of the invention, the piston is a box-type piston, where the piston skirt is open in the direction of the gudgeon pin. According to another embodiment of the invention, the cooling medium injector is arranged to protrude into the cylinder in the direction of the gudgeon pin. With a box-type piston, the cooling medium injector can be fastened directly to the cylinder liner and located close to the bottom surface of the cooling oil gallery.According to another embodiment of the invention, the piston is a box-type piston, where the piston skirt is open in the direction of the gudgeon pin. According to another embodiment of the invention, the cooling medium injector is arranged to protrude into the cylinder in the direction of the gudgeon pin. With a box-type piston, the cooling medium injector can be fastened directly to the cylinder liner and located close to the bottom surface of the cooling oil gallery.

According to an embodiment of the invention, part of the cooling medium duct is arranged inside the wall of the cylinder liner in parallel with the longitudinal axis of the cylinder liner. According to another embodiment of the invention, the lower end of the cylinder liner is provided with an opening for introducing the cooling oil into the cooling medium duct inside the wall of the cylinder liner. According to another embodiment of the invention, the arrangement comprises a drilling in the engine block for introducing the cooling oil into the cooling medium duct inside the wall of the cylinder liner. If the cooling medium duct is arranged inside the wall of the cylinder liner, the need for separate pipes can be eliminated. By arranging the drilling in the lower radial support of the cylinder liner, the cooling oil can be used also as dampening medium for reducing wear and fretting of the contact surfaces between the engine block and the cylinder liner.According to the invention, part of the cooling medium duct is arranged inside the wall of the cylinder liner in parallel with the longitudinal axis of the cylinder liner. According to another embodiment of the invention, the lower end of the cylinder liner is provided with an opening for introducing the cooling oil into the cooling medium duct inside the wall of the cylinder liner. According to another embodiment of the invention, the arrangement consists of drilling in the engine block for introducing the cooling oil into the cooling medium duct inside the wall of the cylinder liner. If the cooling medium duct is arranged inside the wall of the cylinder liner, the need for separate pipes can be eliminated. By arranging the drilling in the lower radial support of the cylinder liner, the cooling oil can be used also as a dampening medium for reducing wear and fretting of the contact surfaces between the engine block and the cylinder liner.

According to still another embodiment of the invention, the arrangement comprises a volume between the engine block and the cylinder liner, from which volume the cooling oil is introduced to the cooling medium injector. The cooling oil can thus also be used as dampening and cooling medium for the cylinder liner. Effective cooling of the cylinder liner can thus be achieved and because of the dampening effect, wear and fretting between the engine block and cylinder liner surfaces is also reduced.According to another embodiment of the invention, the arrangement comprises the volume between the engine block and the cylinder liner, from which volume the cooling oil is introduced to the cooling medium injector. The cooling oil can thus also be used as a dampening and cooling medium for the cylinder liner. Effective cooling of the cylinder liner can thus be achieved and because of the dampening effect, wear and fretting between the engine block and cylinder liner surfaces is also reduced.

Brief description of the drawingsBrief description of the drawings

Fig. 1 shows a piston cooling arrangement according to an embodiment of the invention.Fig. 1 shows a piston cooling arrangement according to an embodiment of the invention.

Fig. 2 shows a cross-sectional view of Fig. 1 taken along line A-A.Fig. 2 shows a cross-sectional view of Fig. 1 taken along line A-A.

Fig. 3 shows a piston cooling arrangement according to another embodiment of the invention.Fig. 3 shows a piston cooling arrangement according to another embodiment of the invention.

Fig. 4 shows a piston cooling arrangement according to still another embodiment of the invention.Fig. 4 shows a piston cooling arrangement according to another embodiment of the invention.

Detailed description of the inventionDetailed description of the invention

Embodiments of the invention are now described in more detail with reference to the accompanying drawings.Embodiments of the invention are now described in more detail with reference to the accompanying drawings.

In figure 1 is shown a cooling arrangement for a reciprocating piston 2 of an internal combustion engine according to an embodiment of the invention. In figure 1, the piston 2 is at bottom dead center. The engine where the piston cooling arrangement is used is a large medium or high speed internal combustion engine. The engine can be used, for instance, as a main or an auxiliary engine of a ship, or at a power plant for producing electricity. The engine can be provided with any reasonable number of cylinders, which can be arranged for example in line or in a V-configuration. Each cylinder of the engine is provided with a cylinder liner 1. The piston 2 is arranged inside the cylinder. The piston comprises a piston crown 2a and a piston skirt 2b. The piston 2 is connected to a connecting rod 3 with a gudgeon pin 4. The piston 2 is a so-called box-type piston, where the piston skirt 2b is open in the direction of the gudgeon pin 4. An empty space 10 is thus formed below the piston crown 2a between the cylinder liner 1 and the piston 2 at both ends of the gudgeon pin 4.In figure 1 is shown a cooling arrangement for a reciprocating piston 2 of an internal combustion engine according to an embodiment of the invention. In figure 1, the piston 2 is at the bottom dead center. The engine where the piston cooling arrangement is used is a large medium or high speed internal combustion engine. The engine can be used, for instance, as a main or an auxiliary engine for a ship, or at a power plant for producing electricity. The engine can be provided with any reasonable number of cylinders that can be arranged for example in a line or in a V-configuration. Each cylinder of the engine is provided with a cylinder liner 1. The piston 2 is arranged inside the cylinder. The piston comprises a piston crown 2a and a piston skirt 2b. The piston 2 is connected to a connecting rod 3 with a gudgeon pin 4. The piston 2 is a so-called box-type piston where the piston skirt 2b is open in the direction of the gudgeon pin 4. An empty space 10 is thus formed below the piston crown 2a between the cylinder liner 1 and the piston 2 at both ends of the gudgeon pin 4.

For cooling the piston 2, the engine is provided with a cooling arrangement. The cooling arrangement is used for introducing cooling oil onto the bottom surface of the piston 2 and further into a cooling oil gallery 7 that is arranged at the upper end of the piston 2 and at least partly inside the piston crown 2a. The cooling arrangement comprises a cooling medium injector 5 that is arranged inside the cylinder. A cooling oil pump (not shown) is connected with a cooling medium duct 6 to the cooling medium injector 5 for supplying the cooling oil to the cooling medium injector 5. The cooling medium injector 5 is located at such a height inside the cylinder that when the piston 2 is at bottom dead center, the tip 5a of the cooling medium injector 5 is above the center axis of the gudgeon pin 4. In the embodiment of figure 1, the tip 5a of the cooling medium injector 5 is above the whole gudgeon pin 4. Since the cooling medium injector 5 is located close to the bottom surface of the cooling oil gallery 7, short spraying distance and effective cooling is enabled. The cooling oil is injected into the space 10 between the cylinder liner 1 and the piston 2 below the piston crown 2a. The cooling medium injector 5 is arranged to inject the cooling oil towards the upper part of the piston 2. From the space 10 below the piston crown 2a, the cooling oil can flow into the cooling oil gallery 7 through an opening 8 that is arranged in the bottom of the cooling oil gallery 7.For cooling the piston 2, the engine is provided with a cooling arrangement. The cooling arrangement is used to introduce cooling oil onto the bottom surface of the piston 2 and further into the cooling oil gallery 7 that is arranged at the upper end of the piston 2 and at least partially inside the piston crown 2a. The cooling arrangement comprises a cooling medium injector 5 that is arranged inside the cylinder. The cooling oil pump (not shown) is connected with a cooling medium duct 6 to the cooling medium injector 5 for supplying the cooling oil to the cooling medium injector 5 The cooling medium injector 5 is located at such a height inside the cylinder that when the piston 2 is at the bottom dead center, tip 5a of the cooling medium injector 5 is above the center axis of the gudgeon pin 4. In the embodiment of figure 1, the tip 5a of the cooling medium injector 5 is above the whole gudgeon pin 4. Since the cooling medium injector 5 is located close to the bottom surface of the cooling oil gallery 7, short spraying distance and effective cooling is enabled. The cooling oil is injected into the space 10 between the cylinder liner 1 and the piston 2 below the piston crown 2a. The cooling medium injector 5 is arranged to inject the cooling oil towards the upper part of the piston 2. From the space 10 below the piston crown 2a, the cooling oil can flow into the cooling oil gallery 7 through an opening 8 that is arranged in. the bottom of the cooling oil gallery 7.

In the embodiment of the figure 1, the cooling medium duct 6 is arranged partly inside the wall of the cylinder liner 1. With this arrangement, the need for separate pipes can be reduced. The cooling medium injector 5 is arranged to protrude from the wall of the cylinder liner 1 into the cylinder in the direction of the gudgeon pin 4. However, it is also possible that the cooling medium injector 5 protrudes into the cylinder in a different angle. The cooling medium injector 5 can also be offset from the center line of the gudgeon pin 4. The cooling medium injector 5 is L-shaped, and the open end of the cooling medium injector 5 points towards the cylinder head. The cooling oil spray is thus directed at the bottom surface of the cooling oil gallery 7. The lower end of the cylinder liner 1 is provided with an opening 9 for introducing the cooling oil into the cooling medium duct 6 inside the wall of the cylinder liner 1. In figures 1 and 2 there is shown also a second cooling medium injector 5'. A second cooling medium duct 6' is arranged partly inside the wall of the cylinder liner 1 for connecting the second cooling medium injector 5' to the cooling oil pump. The cooling oil is introduced into the second cooling medium duct 6' inside the wall of cylinder liner 1 through a drilling 11 in the lower radial support 13 of the cylinder liner 1. By arranging the drilling 11 in the support 13 of the cylinder liner 1, the cooling oil can be used also as a dampening medium for reducing wear and fretting of the contact surfaces between the engine block 12 and the cylinder liner 1.In the embodiment of figure 1, the cooling medium duct 6 is arranged partially inside the wall of the cylinder liner 1. With this arrangement, the need for separate pipes can be reduced. The cooling medium injector 5 is arranged to protrude from the wall of the cylinder liner 1 into the cylinder in the direction of the gudgeon pin 4. However, it is also possible that the cooling medium injector 5 protrudes into the cylinder in a different angle. The cooling medium injector 5 can also be offset from the center line of the gudgeon pin 4. The cooling medium injector 5 is L-shaped, and the open end of the cooling medium injector 5 points toward the cylinder head. The cooling oil spray is thus directed at the bottom surface of the cooling oil gallery 7. The lower end of the cylinder liner 1 is provided with an opening 9 for introducing the cooling oil into the cooling medium duct 6 inside the wall of the cylinder liner 1. In figures 1 and 2 there is shown also a second cooling medium injector 5 '. The second cooling medium duct 6 'is arranged partly inside the wall of the cylinder liner 1 for connecting the second cooling medium injector 5' to the cooling oil pump. The cooling oil is introduced into the second cooling medium duct 6 'inside the wall of the cylinder liner 1 through a drilling 11 in the lower radial support 13 of the cylinder liner 1. By arranging the drilling 11 in the support 13 of the cylinder liner 1 , the cooling oil can be used also as a dampening medium for reducing wear and fretting of contact surfaces between engine block 12 and cylinder liner 1.

In the embodiment of figure 3, the cooling medium duct 6 for introducing the cooling oil to the cooling medium injector 5 is arranged partly inside the engine block 12. The cooling oil is introduced in the cooling medium duct 6 into a volume 14 between the engine block 12 and the cylinder liner 1. The cylinder liner 1 is provided with a drilling 16 for introducing the cooling oil from the volume 14 between the engine block 12 and the cylinder liner 1 into the cooling medium injector 5. By arranging the cooling oil supply via the volume 14 between the engine block 12 and the cylinder liner 1, the cooling oil can be used also as a dampening medium for reducing wear and fretting of the contact surfaces between the engine block 12 and the cylinder liner 1. The arrangement also enables effective cooling of the cylinder liner 1. The embodiment of figure 4 is similar to the embodiment of figure 3. The difference is that the cooling oil is introduced into the volume 14 between the engine block 12 and the cylinder liner 1 through the upper end of the volume 14. A separate pipe 15 is used for introducing the cooling oil into the cooling medium duct 6 of the engine block 12.In the embodiment of Figure 3, the cooling medium duct 6 for introducing the cooling oil to the cooling medium injector 5 is arranged partially inside the engine block 12. The cooling oil is introduced in the cooling medium duct 6 into a volume 14 between the engine block 12 and cylinder liner 1. cylinder liner 1 is provided with a drilling 16 for introducing the cooling oil from the volume 14 between the engine block 12 and the cylinder liner 1 into the cooling medium injector 5. By arranging the cooling oil supply via the volume 14 between the engine block 12 and the cylinder liner 1, the cooling oil can be used also as a dampening medium for reducing wear and fretting of the contact surfaces between the engine block 12 and the cylinder liner 1. The arrangement also enables effective cooling of the cylinder liner 1. The embodiment of figure 4 is similar to the embodiment of figure 3. The difference is that the cooling oil is introduced into the volume 14 between the engine block 12 and the cylinder liner 1 through the upper end of the volume 14. A separate pipe 15 is used to introduce the cooling oil into the cooling medium duct 6 of the engine block 12.

It will be appreciated by a person skilled in the art that the invention is not limited to the embodiments described above, but may vary within the scope of the appended claims.It will be appreciated by a person skilled in the art that the invention is not limited to the embodiments described above, but may vary within the scope of the appended claims.

Claims (6)

1. Jäähdytysjärjestely polttomoottorin edestakaisin liikkuvaa mäntää varten (2), joka mäntä (2) on järjestetty moottorin sylinterin sisävaipan (1) sisäpuolelle ja käsittää männänlaen (2a) ja männänhelman (2b), jäähdytysjärjestelyn käsittäessä - jäähdytysöljykanavan (7), joka on järjestetty ainakin osittain männänlaen (2a) sisälle, - jäähdytysväliaineruiskuttimen (5, 5’), joka on järjestetty sylinterin sisälle sellaiselle korkeudelle, että jäähdytysväliaineruiskuttimen (5, 5’) kärki (5a, 5a’) on männän (2) männäntapin (4) keskiakselin (4a) yläpuolella, kun mäntä (2) on alakuolokohdas sa, aukon (8), joka on jäljestetty jäähdytysöljykanavan (7) alapintaan jäähdytysöljyn viemiseksi männänlaen (2a) alapuolisesta tilasta (10) jäähdytysöljykanavaan (7), ja jäähdytysväliainekanavan (6, 6’) jäähdytysöljyn syöttämiseksi jäähdytysväliaineruiskuttimelle (5, 5’), jäähdytysväliaineruiskuttimen (5, 5’) ollessa järjestetty ruiskuttamaan jäähdytysöljyä männän (2) ja sylinterin sisävaipan (1) väliseen, männänlaen (2a) alapuoliseen tilaan (10) ja osan jäähdytysväliainekanavasta (6, 6’) ollessa jäljestetty sylinterin sisävaipan (1) seinämän sisälle sylinterin sisävaipan (1) pituusakselin suuntaisesti, tunnettu siitä, että järjestely käsittää porauksen (11) moottorilohkossa (12) jäähdytysöljyn viemiseksi sylinterin sisävaipan (1) seinämän sisällä olevaan jäähdytysväliainekanavaan (6’).A cooling arrangement for a reciprocating piston (2) of an internal combustion engine, the piston (2) being disposed inside the inner cylinder housing (1) of the engine and comprising a piston cap (2a) and a piston skirt (2b), the cooling arrangement comprising: partially inside the piston cap (2a), - a coolant injector (5, 5 ') arranged inside the barrel at a height such that the tip (5a, 5a') of the refrigerant injector (5, 5 ') is centered on the piston pin (4) 4a) above, when the piston (2) is at the lower dead center point, the opening (8) which is tracked on the underside of the cooling oil channel (7) for introducing cooling oil from the space (10) below the piston cap (2a) to the cooling oil channel (7); for supplying coolant oil to the coolant injector (5, 5 '), the coolant injector (5, 5') being arranged to inject cooling oil into the space (10) between the piston (2) and the cylinder inner sheath (1), and a portion of the cooling medium passage (6, 6 ') being tracked inside the cylinder inner sheath (1) in the direction of the inner sheath (1); characterized in that the arrangement comprises a bore (11) in the engine block (12) for introducing coolant into the coolant medium passage (6 ') inside the cylinder inner shell (1). 2. Patenttivaatimuksen 1 mukainen jäähdytysjärjestely, tunnettu siitä, että jäähdytysväliaineruiskuttimen (5, 5’) kärki (5a, 5a’) on koko männäntapin (4) yläpuolella, kun mäntä (2) on alakuolokohdassa.A cooling arrangement according to claim 1, characterized in that the tip (5a, 5a ') of the cooling medium injector (5, 5') is above the entire piston pin (4) when the piston (2) is at the lower dead center. 3. Patenttivaatimuksen 1 tai 2 mukainen jäähdytysjärjestely, tunnettu siitä, että mäntä (2) on box-tyyppinen mäntä (2), jossa männänhelma (2b) on avoin männäntapin (4) suunnassa.Cooling arrangement according to claim 1 or 2, characterized in that the piston (2) is a box-type piston (2), in which the piston skirt (2b) is open in the direction of the piston pin (4). 4. Patenttivaatimuksen 3 mukainen jäähdytysjärjestely, tunnettu siitä, että jäähdytysväliaineruiskutin (5, 5’) on järjestetty työntymään sylinteriin männäntapin (4) suunnassa.Cooling arrangement according to Claim 3, characterized in that the cooling medium injector (5, 5 ') is arranged to project into the cylinder in the direction of the piston pin (4). 5. Tonkin edeltävistä patenttivaatimuksista mukainen jäähdytysjärjestely, tunnettu siitä, että sylinterin sisävaipan (1) alapää on varustettu aukolla (9) jäähdytysöljyn viemiseksi sylinterin sisävaipan (1) seinämän sisällä olevaan jäähdytysväliainekanavaan (6).Cooling arrangement according to one of the preceding claims, characterized in that the lower end of the cylinder inner shell (1) is provided with an opening (9) for introducing cooling oil into the cooling medium channel (6) inside the cylinder inner shell (1). 6. .Tonkin edeltävistä patenttivaatimuksista mukainen jäähdytysjärjestely, tunnettu siitä, että järjestely käsittää tilavuuden (14) moottorilohkon (12) ja sylinterin sisävaipan (1) välissä, josta tilavuudesta (14) jäähdytysöljy viedään jäähdytysväliaineruiskuttimelle (5).Cooling arrangement according to one of the preceding claims, characterized in that the arrangement comprises a volume (14) between the engine block (12) and the cylinder inner shell (1), from which volume the cooling oil is delivered to the cooling medium injector (5).
FI20125167A 2012-02-15 2012-02-15 The piston cooling arrangement FI124930B (en)

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Application Number Priority Date Filing Date Title
FI20125167A FI124930B (en) 2012-02-15 2012-02-15 The piston cooling arrangement
CN201380008062.0A CN104126068B (en) 2012-02-15 2013-02-13 Piston cooling device
PCT/FI2013/050158 WO2013121105A1 (en) 2012-02-15 2013-02-13 Piston cooling arrangement and cylinder liner
BR112014018952-8A BR112014018952B1 (en) 2012-02-15 2013-02-13 REFRIGERATION ARRANGEMENT FOR A RECIPROCANT PISTON OF AN INTERNAL COMBUSTION ENGINE
KR1020147023469A KR102065800B1 (en) 2012-02-15 2013-02-13 Piston cooling arrangement and cylinder liner
EP13712819.5A EP2820277B1 (en) 2012-02-15 2013-02-13 Piston cooling arrangement and cylinder liner

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FI20125167A FI124930B (en) 2012-02-15 2012-02-15 The piston cooling arrangement
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Publication number Priority date Publication date Assignee Title
AT514089B1 (en) 2013-09-04 2014-10-15 Avl List Gmbh Internal combustion engine with at least one cylinder
DE102016113394B3 (en) * 2016-07-20 2017-10-19 Ino8 Pty Ltd Thermal management system and method of variable cylinder cooling of an internal combustion engine
US10808646B2 (en) * 2019-01-09 2020-10-20 Haier Us Appliance Solutions, Inc. Cooled piston and cylinder for compressors and engines
WO2023193885A1 (en) 2022-04-05 2023-10-12 Wärtsilä Finland Oy A nozzle for a cooling arrangement of a piston in an internal combustion piston engine and a cooling arrangement for a piston of an internal combustion piston engine
WO2024044450A1 (en) * 2022-08-22 2024-02-29 Cummins Inc. Pistons and internal combustion engine cylinders configured for piston cooling

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2135896A1 (en) * 1971-07-17 1973-02-01 Kloeckner Humboldt Deutz Ag PISTON COOLING FOR COMBUSTION MACHINES
DE19747746C1 (en) * 1997-10-29 1998-11-19 Alcan Gmbh Cooled piston for combustion (IC) engine
US6634278B2 (en) * 2000-10-18 2003-10-21 Caterpillar Inc. Piston for an internal combustion engine and method of assembly
DE10214830A1 (en) * 2002-04-04 2004-01-08 Mahle Gmbh Oil inlet for a piston of an internal combustion engine provided with a cooling channel
KR100610108B1 (en) * 2004-08-18 2006-08-09 현대자동차주식회사 Cooling nozzle for piston
DE102004056769A1 (en) * 2004-11-24 2006-06-01 Federal-Mogul Nürnberg GmbH Piston for an internal combustion engine and combination of a piston with an oil injection assembly
JP4337741B2 (en) * 2005-01-19 2009-09-30 トヨタ自動車株式会社 Piston for internal combustion engine

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EP2820277A1 (en) 2015-01-07
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CN104126068B (en) 2017-05-31
KR102065800B1 (en) 2020-02-11

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