CN102575614A - Method for cooling a piston and a cooled piston - Google Patents
Method for cooling a piston and a cooled piston Download PDFInfo
- Publication number
- CN102575614A CN102575614A CN2010800325592A CN201080032559A CN102575614A CN 102575614 A CN102575614 A CN 102575614A CN 2010800325592 A CN2010800325592 A CN 2010800325592A CN 201080032559 A CN201080032559 A CN 201080032559A CN 102575614 A CN102575614 A CN 102575614A
- Authority
- CN
- China
- Prior art keywords
- piston
- cooling channel
- dividing element
- zone
- oil
- 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
Links
Images
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
- F01P3/06—Arrangements for cooling pistons
- F01P3/08—Cooling of piston exterior only, e.g. by jets
-
- 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
-
- 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
- F02F3/0015—Multi-part 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
- 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
Abstract
The invention relates to cooling a piston (1) of an internal combustion engine, wherein a piston bottom (17) that is exposed to at least one combustion jet is cooled by sprayed oil, wherein the oil is sprayed from a pressure chamber (12), through at least one opening (16) of a separating element (11) that is positioned in a cooling channel (9) of the piston (1) and thus forms the pressure chamber (12) that can be filled with oil between a part of the wall of the cooling channel (9) and the separating element (11), into the cooling channel (9) directly on at least one region of the bottom side of the piston bottom (18) by pressure created in the pressure chamber (12) filled with oil. According to the invention, the oil is directly sprayed in a continuous manner on the region of the bottom side of the piston bottom (18), which lies opposite the region of the piston bottom (17) and which is not directly exposed to the combustion jet.
Description
Technical field
The present invention relates to be used for method and a kind of piston of internal-combustion engine of the piston of cooling internal combustion engines according to the corresponding preamble characteristic of two independent claims a kind of; In said method, bear the piston head of at least one fuel beam and cool off through the oil that sprays.
Background technique
A kind of piston that is used for internal-combustion engine is disclosed among the WO 2007/110056A1, its around the cooling channel in be provided with and be parallel to the ring-type partition wall that piston head is provided with.Said partition wall has one or more nozzle-like openings.Oil is as the cooling medium of piston.The oil ejection beam-positioning of opening is to the piston head downside.At this, the ejection beam bumps against on some zones of downside, and at least one fuel beam is born in the zone of said zone on opposed upside.
During the operation of piston in internal-combustion engine, because fuel combustion, originally produce high temperature on one's body at the upside and the piston of piston head.Disadvantageously be: the safety in operation of the influence on system operation piston under the high temperature, because at high temperature piston possibly expand in cylinder and on piston, produce other friction condition thus.High heat load on the piston head upside also can cause piston material tired and long-time afterwards owing to the overheated piston material that causes becomes useless.
Summary of the invention
Therefore, task of the present invention provides a kind of method and piston that starts said type, can reduce the temperature of piston when operation whereby.
According to the present invention, this task is able to solve in the following manner: said oil is injected on such zone of piston head downside continuously targetedly, and this zone is positioned at the opposite of directly not bearing the zone of fuel beam of piston head (Kolbenboden).
Cooling according to internal combustion engine of the present invention can produce following advantage:
On the one hand, through cooling off targetedly, temperature and the temperature on the circular groove on the firing chamber cavity in the piston have been reduced by means of oil.On the other hand, improved the safety in operation of piston through the operating temperature that reduces.At this, according to the present invention, the surface temperature of piston, especially piston head is reduced.In addition, reduced the tired danger of piston material through cooling.Prevented for a long time that also material from becoming useless, for example prevents material crack, fret wear and/or material deterioration inside.In addition, the opening through the suitable quantity in the dividing element and the opening diameter that is fit to cooling piston best.Can make oil ejection best from the pressure chamber through the pressure that is fit in the pressure chamber, thereby avoid on piston underside, forming oily carbon distribution.
In a kind of favourable scheme of the present invention, piston has the cooling channel of at least one interruption, thus cooling channel itself and not exclusively in piston around.In the favourable scheme of another kind of the present invention, piston has a plurality of cooling channels, said cooling channel be respectively interrupt and each interval turn up the soil in a preferred plane around.These cooling channels preferably are arranged in the plane with the piston medial axis respectively at this with separating same distance.As alternative, in the favourable scheme of another kind, the cooling channel of piston also can be used as a complete cooling channel in piston around.
According to the present invention, dividing element is positioned in the cooling channel and the cooling channel of piston is divided into two zones.The zone of a formation in the cooling channel is to be the pressure chamber that in original cooling channel, forms in the zone of the cooling channel that reduces on the volume and another formation, and the volume of this pressure chamber approximates volume poor of volume and the said cooling channel that reduces of cooling channel greatly.
Dividing element has at least one opening at this, and oil is injected on the piston head downside from said opening from continuous ejection of said opening and oil.
The structure dividing element makes it cooperate the shape of cooling channel like this.Thus, dividing element can be positioned in the cooling channel ordinatedly.At this, dividing element can be designed to parts.As alternative, dividing element also can be made up of and said component are combined into a dividing element a plurality of component.Dividing element can have the partition wall form plane shape, have protruding arch shape, have the shape of inclination or have arbitrarily other possible geometrical shape.The size of dividing element adapts to the application of piston at this.Therefore according to the size of piston with thus also according to the size of the cooling channel size of definite dividing element adaptedly.
In a kind of preferred scheme of the present invention, dividing element is processed by metal or light metal, preferred steel, Steel Alloy, aluminum or aluminum alloy.In addition, dividing element can be processed by plastics or hard material.
Dividing element preferably by formation technique as casting, by deformation technique as forging or compacting and/or process by manufacturing process such as turning, grinding or the milling of cutting.
Pressure chamber in the cooling channel of piston is formed between a part of wall of a part of wall and dividing element of cooling channel.According to the present invention, fill and be in the oil under the pressure pressure chamber.As alternative, any another kind of cooling medium also can be filled by the pressure chamber.
A part of surface of pressure chamber is preferably by manufacturing process, preferably process so that form favorable surface quality by the manufacturing process of cutting in the piston.In the cooling channel that favorable surface quality allows dividing element to pack into ordinatedly to go out by manufacturing process such as grinding and/or Milling Process.Preferably process a part of wall of said pressure chamber from the side at this; That is to say; For example under the situation of the piston of two-piece type, cutter is the remaining surface of tonnage locular wall and tonnage chamber ordinatedly on the surface of contact of dividing element and pressure chamber wall from the side respectively.
Through forming the pressure chamber of sealing in the cooling channel that dividing element is packed into ordinatedly, because the wall of cooling channel and dividing element constitute the cooperation with closed tolerance.
In the favourable scheme of another kind of the present invention; The pressure chamber that is made up of dividing element in the cooling channel passes through at least one seal element, preferably seals with respect to the cooling channel in the piston on the part surface of contact of dividing element and cooling channel by at least one seal ring element and/or at least one ebonite, to avoid the pressure loss in the pressure chamber.Shape and design proposal according to the surface of contact of dividing element and cooling channel are preferably used seal ring element and/or ebonite.
In the pressure chamber of extending oil, preferably set up the pressure of 1.5 to 10 crust, preferred about 3 crust.Pressure is based upon in the pressure chamber and oil accumulates in the pressure chamber continuously continuously thus.At this, fresh oil respectively with certain pressure and volume flowrate continuous supplementation in the pressure chamber, thereby remain the pressure that operation is set.The pressure of in the pressure chamber of extending oil, setting up preferably produces by pumping action or injection through connecting rod or pin.When supplying with oil, for example can supply with oil through pin-and-hole through pin.According to the application and the size of piston, can set another pressure outside 1.5 crust to the boundary of 10 crust ordinatedly.
As a kind of preferred scheme of the present invention, dividing element by the sealed connection of friction, preferably be threaded or crimping is fixed on the cooling channel.Under situation about being threaded, dividing element be positioned in the cooling channel and preferably by at least one bolt with or piston at least one screw thread be fixed on the cooling channel.Under the situation of crimping, like this dividing element is fixed in the cooling channel, make preferably between dividing element and cooling channel, to form inseparable connection.
Replacement or additionally, dividing element can be by the sealed connection of material, preferred bonding and/or be weldingly fixed on the cooling channel.Under the situation of the sealed connection of material, be positioned at that dividing element preferred immobilization in the cooling channel is bonded on the cooling channel and/or preferred and cooling channel welds together.Between dividing element and cooling channel, form inseparable connection thus.
In the favourable scheme of another kind, the dividing element in the cooling channel is made by formation technique, preferred casting.Piston also preferably is configured to the piston of single type at this through formation technique, for example sand casting process or permanent mold casting.So directly make at piston through losing the core technology when being arranged in wherein dividing element one and coexisting for example sand casting process the cooling channel.As alternative, dividing element also can directly together be casted in the piston when casting by losing the core technology when permanent mold casting.As alternative, the upper and lower can cast separately, and wherein, dividing element is together cast out when casting top or bottom.
As alternative, piston or upper and lower also can be by deformation technique as forging or compacting or make by milling process such as turning or milling.As alternative, the upper and lower also can be made by different manufacturing process respectively.
The piston of single type is preferably by metal or light metal, preferably processed by iron, steel, Steel Alloy, aluminum or aluminum alloy.In the piston that comprises the upper and lower of two-piece type, can be the upper and lower and use identical or different material.The material that is used for the upper and lower is metal or light metal, especially iron, steel, Steel Alloy, aluminum or aluminum alloy preferably.
Next the design proposal of a unique opening in the dividing element only exemplarily is described.Under the pressure and oil that be used for cooling piston at least one opening through dividing element that is in the pressure chamber is sprayed towards piston underside continuously.Said oil preferably is injected on such zone of piston head downside continuously targetedly, and this zone is positioned at the opposite of directly not bearing the zone of fuel beam of piston head.Thus just in time cooling piston not through at least one fuel beam cooled zones.Can know by thermometry: in such zone (the fuel beam does not bump against on these zones and these zones not by the fuel cools of fuel beam in piston), 100 ℃ and higher temperature can not occur.The temperature in the zone that in piston, is bumped against by the fuel beam is lower than the temperature in the zone that is not bumped against by the fuel beam.The fuel beam can be regarded as the fuel jet that imports in the firing chamber, and it bumps against on the surface of piston head and in the firing chamber, burns.
Opening can be configured among the dividing element itself or through two or more, as can be combined into a dividing element together component and constitute.According to the design proposal of cooling channel, dividing element also is configured to the form of distribution loop or ring, with regard to the circle of cooling channel, annular and/or oval-shaped around with regard to, oil is ejected on the piston head downside through the opening of dividing element is corresponding ordinatedly.The cooling channel also can circular, annular and/or vesica piscis around situation under interrupt on extending, make only when each interruptive area imagination is connected, to obtain complete circle, annular and/or elliptical shape.
Opening preferable configuration in the dividing element is common hole.At this, the opening in the dividing element is not carried out the special processing on the manufacturing technology on surface and vpg connection.As alternative, opening also can be configured to Venturi nozzle or another kind of bleed type.At this, as alternative, also can be with getting out as the opening of plain bore form according to nozzle, thus produce the nozzle-type hole.As alternative, opening can just join in the dividing element when casting dividing element itself.As the favourable scheme of another kind of the present invention, the opening preferable configuration is tubulose, slit-like and/or nozzle-like.A kind of be in the scheme of width groove with open design, form the slit-like opening, from wherein spraying wide planar beam.
According to the present invention, opening is directed towards a zone of piston head downside like this, makes oil be injected into targetedly continuously on this zone of piston head downside, and this zone is positioned at the opposite of directly not bearing the zone of said at least one fuel beam of piston head.The replacement or additionally; In the favourable scheme of another kind; Opening also can be directed towards a zone of piston head downside; Feasible oil is injected on this zone of piston head downside continuously targetedly, and this zone is positioned at the opposite in the zone of directly bearing said at least one fuel beam of piston head.Thus; Under the situation of using at least two openings; The side over there that the side over there (opposition side) of piston head downside is born zone and the piston head downside of fuel beam is not directly born the zone of fuel beam and can be sprayed by corresponding opening (the for example opening of corresponding configuration), makes the zone of bearing the fuel beam sprayed by one of them opening and the zone of not bearing the fuel beam is sprayed by the another one opening.As alternative, oil also can be injected on the zone of piston underside through a unique opening, and said zone is born the fuel beam and in some regional areas, do not born fuel region on the side over there in some regional areas.In the favourable configuration of another kind, the shape of the opening in the dividing element and design proposal also can change, and make in a dividing element, to have a plurality of various openings types.
In the favourable scheme of another kind of the present invention, the opening through dividing element additionally sprays and acceleration towards the piston head downside from the pressure chamber through the said oil of the stroke movement of piston.Especially when piston from the firing chamber, shift out once more and the firing chamber when this enlarges because the inertia of oil in the pressure chamber, the pressure in the pressure chamber is increased through the stroke movement of piston.
In order to realize the best cooling of piston at the piston run duration, must the open amount in the dividing element is harmonious.Also must adjust the diameter of opening for the best cooling.The size of dividing element split shed will be adjusted according to the size and the required cooling power of piston of dividing element at this.In the favourable scheme of another kind, be preferably a unbroken loop around passage use 1 to 180 opening.The open amount of the cooling channel that is used to interrupt draws by a factor, this factor can by the length of the cooling channel of interrupting and unbroken loop around the length ratio of cooling channel calculate.Therefore, 50% around the cooling channel in, preferred open amount is 1 to 90, because the ratio that is drawn is 0.5.Replacement or replenish ground, the ratio of open amount and opening diameter can be between 1: 10 1/mm (1/10th every millimeter) and 360: 1 1/mm (360 every millimeter).
In the favourable scheme of another kind of the present invention, piston comprises the upper and lower, when this piston of combination, can form at least one common supporting surface by the upper and lower.Can in the zone of this supporting surface, independent resolution element be located simply and be installed in the piston thus.
In the favourable scheme of another kind of the present invention, piston comprises at least one cooling slit and/or at least one cooling hole.Said cooling slit and/or cooling hole can preferably be separately positioned between each cooling channel of interrupting, and make to strengthen the piston cooling of piston head in other words by means of cooling slit and/or cooling hole.
Description of drawings
Set forth preferred embodiment of the present invention in detail by four accompanying drawings.Accompanying drawing is following:
Fig. 1 is the partial view of piston, and dividing element is fixed on the cooling channel by stay bolt in the cooling channel of piston;
Fig. 2 and 3 is the dividing element in the piston partial view, its by ebonite be bolted in the cooling channel of piston; With
Fig. 4 is the another kind of embodiment of the dividing element in the piston partial view.
Embodiment
The partial view that is used for the piston 1 of internal-combustion engine shown in the accompanying drawing 1 to 4.Piston 1 is constructed identical in three kinds of embodiments respectively and next at first it is carried out general description.Afterwards, this three kinds of embodiments are detailed respectively.At last, with reference to these three kinds of embodiments the piston in the running state is described.Same parts uses same reference character and new reference character to be used for different parts in the accompanying drawings in four accompanying drawings.
The piston 1 that is used for internal-combustion engine comprises top 2 and bottom 3 three kinds of embodiments.
Make separately with respect to bottom 3 on top 2.Between top 2 and bottom 3, can form at least one common supporting surface.In three kinds of embodiments, form two supporting surfaces 4,5 respectively.
Top 2 and bottom 3 in an embodiment by friction sealedly be connected, for example by unique (not shown) that is connected to each other that is threaded.In order to locate top 2 and bottom 3, use pin, this pin is located said two supporting surfaces 4,5 ordinatedly.
Replacement or additionally, upper and lower also can be connected to each other by rub sealed connection, for example crimping of another kind.
The replacement or additionally, the upper and lower also can by the sealed connection of material, for example bonding and/or the welding be connected to each other.
Piston 1 has at least one firing chamber cavity 6 (unique in an embodiment firing chamber cavity 6), at least one circular groove 7 (three circular grooves 7 around whole piston 1 in an embodiment), unique piston head 17, at least one cooling channel 9 (two cooling channels 9 of in piston 1, interrupting in an embodiment) and is used for exhaust port 10 (a plurality of in an embodiment exhaust port 10 that is used for the cooling channel 9 of corresponding interruption) that oil is discharged from corresponding cooling channel 9 with at least one.In addition; In embodiment according to Fig. 1 to 3, piston 1 for the cooling channel 9 of each interruption have one unique in groove, in corresponding cooling channel 9 of interrupting around seal ring 8 and in embodiment, have according to Fig. 4 two in corresponding cooling channel 9 of interrupting around seal ring 8.The at first task of seal ring 8 in piston 1 is with the regional seal of the cooling channel 9 of interrupting accordingly with respect to cylinder liner.In an embodiment, a plurality of fuel jets bump against on the upside of piston head 17 (not shown in Fig. 1 to 4).
Next exemplarily specify one of cooling channel 9 of two interruptions in the piston 1.The cooling channel of another interruption is configured to identical.The cooling channel 9 of said two interruptions is arranged in the piston 1 respectively at this like this; Promptly; They are arranged in a plane and separate same distance ground in piston 1 same distance that separates each other with piston medial axis (on stroke direction, seeing), in each embodiment, form thus to be symmetrical set.The cooling channel 9 of said two interruptions constitutes an about angle of 150 ° based on its size respectively at this.Piston 1 with cooling channel 9 of these two interruptions can additionally have at least one cooling slit and/or at least one cooling hole on some position, have distance between the cooling channel 9 two interruptions on the said position.In an embodiment, two cooling slits are set respectively on said position, so that further support cooling.
Next one of cooling channel 9 of two interruptions in the described piston 1 is divided into two zones through dividing element 11 in an embodiment.The zone of a formation of cooling channel 9 is pressure chambers 12, and this pressure chamber is formed between the part of wall of a part and dividing element 11 of wall of cooling channel 9.The other second area of cooling channel 9 is the cooling channel 9a that on volume, reduce with respect to original cooling channel 9.
In said three embodiments, the cooling channel 9 of interruption only has a unique dividing element 11, and this dividing element only is made up of unique component.Dividing element 11 in the zone of the cooling channel 9 of whole interruption around once.Dividing element 11 also has at least one opening 16 in according to the embodiment of Fig. 1 to 4.These embodiments have a plurality of openings 16 respectively, and it also will be specified in each embodiment.
As alternative, dividing element can be made up of a plurality of component that are used to be combined into a complete dividing element, this dividing element be combined in the zone of the cooling channel of interrupting unbroken loop around.At least one opening also can constitute through at least two dividing elements at this, when said two dividing elements of combination, forms at least one unique opening thus at least.
In said embodiment, dividing element 11 is for example processed by aluminum alloy.
Next, respectively said three embodiments are elaborated.
Dividing element 11 in according to the embodiment of Fig. 1 by the sealed connection of friction, for example be threaded in the cooling channel 9 that is fixed on interruption.
In order to be threaded, in this embodiment, in the cooling channel 9 of the interruption of piston 1, use stay bolt 13, it is by in the bottom that is screwed at piston 13.In the cooling channel 9 for the interruption that dividing element 11 is fixed on piston 1, preferably use three stay bolts 13.As alternative, available arbitrarily other the bolt type, replace stay bolt like cylinder head bolt, so that dividing element 11 is fixed on the piston 1.In addition, bottom 3 has the tapped hole of cooperation on the position that stay bolt 13 is set.
In addition, dividing element 11 has the fixed hole 14 of cooperation on these positions, below stay bolt 13 on the said position is positioned at dividing element 11.
One of stay bolt 13 of use shown in Figure 1 exemplarily is described below.
Through stay bolt 13 being positioned in the fixed hole 14 of dividing element 11, dividing element 11 can be fixed on the stay bolt by nut on the upside of stay bolt 13, stay bolt with its downside by screwed in bottom 3.
According to Fig. 1, dividing element 11 is flat on the plane of bottom 3 with a zone at this, thereby forms pressure chamber 12.Another zone of dividing element 11 and the wall of cooling channel 9 by at least one seal element, preferably by at least one seal ring element 15 and/or at least one ebonite with respect to the cooling channel 9a sealing that reduces in the piston 1.In the embodiment according to Fig. 1, for dividing element 11 uses a unique seal ring element 15 respectively, it is sealed in pressure chamber 12 between the wall of dividing element 11 and cooling channel 9.At this, according to Fig. 1, in the groove that seal ring element 15 embeds in the dividing element 11.
As alternative, dividing element can be by ebonite with respect to the sealing of cooling channel wall, and ebonite for example is positioned in the bottom between dividing element and the cooling channel wall.
In order before using dividing element 11, to form favorable surface quality; By manufacturing process, preferably come the surface of the pressure chamber 12 in the machining piston 1 by cutting manufacturing process such as milling and/or grinding, make that the seal ring element 15 that is used for this embodiment can seal well and dividing element 11 can abut in bottom 3 well in the cooling channel.In this embodiment, the pressure chamber is at first by milling and then by grinding, thereby forms smooth high-quality surface.
In some piston scheme, as in the piston of casting, also can abandon said method step.
Replacement or additionally, dividing element also can be fixed in the cooling channel by rub sealed connection, preferred crimping of another kind., be pressed in other words in the bottom through dividing element is for example inserted to wedge shape, the wall of dividing element and cooling channel forms sealed being connected of friction for this reason.
Replacement or additionally, dividing element also can be by the sealed connections of material, preferred bonding and/or be weldingly fixed in the cooling channel.For this reason with dividing element and the cooling channel wall is bonding and/or the welding.
In this embodiment, by a plurality of oil inlet holes (not shown in Fig. 1) that are arranged in the bottom 3 of piston 1 to pressure chamber's 12 transferring oils.
Dividing element 11 according to Fig. 1 has a plurality of openings 16, and it is configured to tubulose.At this, according to Fig. 1, dividing element 11 has the upper end part of a plurality of tubuloses, the setting of turning up the soil of its each interval.For example in said upper end part, process tubular opening 16 respectively according to Fig. 1 by boring.The opening 16 of hole shape does not carry out special processing at this.Can oil be injected on the piston head downside 18 targetedly.
Through the size according to the upper end part 16 of Fig. 1, the oil of 12 ejections can not be injected into the oil that accumulates in the cooling channel 9a that reduces from the pressure chamber, because this upper end part protrudes in the oil that accumulates among the cooling channel 9a that reduces.
As alternative, each opening also can be configured to nozzle-like, for example Venturi nozzle formula.The pressure of the oil that sprays from the pressure chamber thus, is compared further increase with the pressure of the oil that sprays from plain bore and is optimized in other words.
Next specify the embodiment of Fig. 2 and 3.
In according to Fig. 2 and 3 embodiments, in dividing element 11, cavity is set, it constitutes pressure chamber 12.Dividing element 11 this be flat in the zone of the cooling channel 9 of interrupting around ebonite 20 on, ebonite inserts in the recess of cooling channel 9 of the interruption in the bottom 3 ordinatedly.Ebonite 20 cooperates the profile of cooling channel 9 at this.Cavity is supplied to oil by means of at least one oil inlet hole 21 that passes bottom 3 and ebonite 20 respectively by means of pumping action or injection through connecting rod or the pin that passes bottom 3 and ebonite 20.In the embodiment according to Fig. 2 and 3, piston 1 has a plurality of oil inlet holes 21.Through the continuous build-up pressure of the oil that under pressure, is supplied to from oil inlet hole 21, wherein, the new oil of supplying with is with the pressure of regulation with the follow-up continuously inflow of the volume flowrate pressure chamber 12 of regulation, promptly flow in the cavity in cavity.
According to Fig. 3; Through at least one fixed hole 14 in the dividing element 11 (being preferably three fixed holes 14 in this embodiment) and through at least one hole in the ebonite 20 (being preferably three holes in this embodiment), at least one cylinder head bolt 22 (being preferably three cylinder head bolts 22 in this embodiment) passes dividing element 11 and tightens with ebonite 20 and by at least one screw thread (being three screw threads in this embodiment) and bottom 3.At this, each cylinder head bolt 22 passes hole of fixed hole 14 and ebonite 20 and twists by means of screw thread according to Fig. 3 and connects.Thus, dividing element 11 is fixedly connected and in the cooling channel 9 of interrupting, forms the pressure chamber 12 through ebonite 20 sealings with the bottom 3 of piston 1 with ebonite 20.
Dividing element 11 according to Fig. 2 and 3 has a plurality of slit-like openings 16, and an opening 16 only is shown respectively in Fig. 2 and 3.Dividing element 11 has the slit-like upper end part of a plurality of cooperations, and it has a slit-like opening 16 respectively.The upper end part has degree of depth T respectively at this.Slit-like opening 16 is got out in the corresponding in other words upper end part of dividing element 11 respectively in according to the embodiment of Fig. 2 and 3.
Next slit-like opening 16 among Fig. 2 is briefly described.Slit-like opening 16 shown in Fig. 2 respectively by means of the upper end part in the cooling channel 9 of interrupting with certain angle segment (for example 40 °) in the cooling channel of interrupting around.Thus, when oil slit-like when ejection ground from the slit-like opening 16 of partition wall 11, but by a planar zone of the slot form spritzpistole top downside 18 of opening 16.
As alternative, dividing element also can be bonded on the ebonite.Subsequently, can the ebonite that match with the lower area of cooling channel be bonded in the recess in the cooling channel.
Next the embodiment of Fig. 4 is detailed.
In the embodiment according to Fig. 4, friction embeds in the bottom 3 of piston 1 and with it sealedly and fixes dividing element 11 as parts.At this, between bottom 3 and dividing element 11, form two engaging zones 23.According to Fig. 4, with respect to the gentle liner packing of cooling channel 9a that reduces, said seal ring is positioned at respectively in the groove according to the dividing element 11 of Fig. 4 by two seal rings 8 in the pressure chamber 12 of dividing element 11.Between a part of wall that deviates from circular groove 7 on top 2 and the cavity in dividing element 11, form pressure chamber 12, oil at least one opening 16 through dividing element 11 from this pressure chamber flows out.In this embodiment, dividing element 11 has a plurality of openings 16.Said opening is arranged on respectively in the dividing element 11 at this ordinatedly, makes for example to be formed in the top contact pin of dividing element 11 according to opening 16 of Fig. 4.In the embodiment according to Fig. 4, said opening 16 is got out in dividing element 11 respectively.Through the degree of depth and the form generation tubular opening 16 of corresponding boring, its oil that will flow out is ordinatedly towards 18 guiding of piston head downside.In addition, dividing element 11 has a plurality of oil inlet holes 21.An opening 16 and an oil inlet hole 21 only are shown in Fig. 4.
Next the operation of piston 1 in internal-combustion engine according to three kinds of embodiments of Fig. 1 to 4 exemplarily be described.
In an embodiment through connecting rod and pin by pumping action or be injected in the oil that is supplied under the pressure and flow in the pressure chamber 12 of the cooling channel 9 of interrupting via oil inlet hole 21.Thus, oil is distributed in the pressure chamber 12.At the pressure of this pressure of in pressure chamber 12, setting up, preferred about 3 crust serially with the direction ejection of oil from the opening 16 of dividing element 11 towards piston head downside 18.From unique beam 19 of each opening 16 ejection.In the embodiment according to Fig. 1 and 4, beam 19 is based on the tubulose moulding of the opening 16 of corresponding borehole shape and the beam 19 with circular.In the embodiment according to Fig. 2 and 3, corresponding beam 19 constitutes according to the form of the planar oily wall of ejection, because be respectively slit-like according to the shape of the opening 16 of Fig. 2 and 3.
Replacement or additionally, also can by the orientation of corresponding opening with oil spurts to such zone of piston head downside, these zones are positioned at the opposite in the zone of directly bearing the fuel beam of piston head.
When piston 1 decline, promptly when the firing chamber enlarges; Because the inertia of oil, oil under higher pressure (oil content does not have the pressure greater than 3 crust in said three embodiments) spray from pressure chamber 12 through corresponding opening 16 and quicken from opening 16 towards piston head downside 18 directions.
The oil that has just sprayed among the cooling channel 9a that reduces is discharged from the cooling channel 9a that reduces through a plurality of exhaust ports 10 subsequently once more.
In order to have the piston of at least one cooling slit and/or at least one cooling hole; In the mode of execution of the possible replacement the foregoing description of another kind; Piston can be configured to single supporting piston (Einauflagenkolben), that is to say that this piston only needs unique (interior) supporting surface.As inner bearing face for example referring to the supporting surface 4 that is positioned at inside (near the piston medial axis) among Fig. 1.
In the another kind of possible alternative scheme of the foregoing description, the cooling channel in the piston also around.Dividing element cooperates the shape and the size of cooling channel to adjust.For example can use single type, around dividing element.Preferably around the situation of cooling channel under the screw thread that uses six to eight fixing devices (for example stay bolt or cylinder head bolt) and cooperate quantity with dividing element is fixed on around the cooling channel in.
As alternative, in another embodiment, piston only has a unique cooling channel and interrupts in this cooling channel of this piston, makes the cooling channel center on the piston medial axis and forms the angle less than 360 °.Dividing element cooperates the shape and the size of cooling channel to adjust.
In the mode of execution of another kind replacement, piston comprises the top and the bottom that casts separately of casting.In this piston; Dividing element also can be by formation technique, preferably be cast in the cooling channel of piston element and together made, and its mode is: for example the bottom is by casting technique, like sand casting process or permanent mold casting is made and for example directly in the bottom, cast out dividing element by losing the core technology.
In the mode of execution of another kind replacement, also can piston and the dividing element of the whole piston that comprise the upper and lower as single type together be cast out.
In the embodiment of another kind replacement, can in piston, realize the combination in any of three kinds of embodiments shown in Fig. 1 to 4.
Reference numerals list
1 piston
2 tops
3 bottoms
4 supporting surfaces
5 supporting surfaces
6 firing chamber cavitys
7 circular grooves
8 seal rings
9 cooling channels
The cooling channel that 9a reduces
10 exhaust ports
11 dividing elements
12 pressure chambers
13 stay bolts
14 fixed holes
15 seal ring elements
16 openings
17 piston head
18 piston head downsides
19 beams
20 ebonite
21 oil inlet holes
22 cylinder head bolts
23 engaging zones
T (the slit-like opening) degree of depth
Claims (14)
1. the method that is used for the piston (1) of cooling internal combustion engines; Wherein, Bearing the piston head (17) of at least one fuel beam cools off through the oil that sprays; (12)s at least one opening (16) through dividing element (11) is injected at least one zone of piston head downside (18) said oil targetedly from the pressure chamber through the pressure that in the pressure chamber (12) of extending oil, produces; Said dividing element be positioned in the cooling channel (9) of piston (1) and thus in cooling channel (9) at a part of wall of cooling channel (9) and dividing element (11) but a part of wall between constitute the said pressure chamber (12) of extending oil; It is characterized in that said oil is ejected into continuously targetedly on such zone of piston head downside (18), this zone is positioned at the opposite of directly not bearing the zone of fuel beam of piston head (17).
2. method according to claim 1 is characterized in that, in the pressure chamber (12) of said extending oil, sets up the pressure of 1.5 crust to 10 crust, preferred about 3 crust.
3. method according to claim 1 and 2 is characterized in that, the pressure of setting up in said pressure chamber at extending oil (12) produces by means of pumping action or injection via connecting rod or pin.
4. according to one of aforesaid right requirement described method; It is characterized in that; Said oil additionally is ejected on such zone of piston head downside (18) continuously targetedly; This zone is positioned at the opposite in the zone of directly bearing the fuel beam of piston head (17), thereby the zone of bearing the zone of fuel beam and not bearing the fuel beam is all sprayed.
5. according to one of aforesaid right requirement described method, it is characterized in that through the stroke movement of piston (1), (opening (16) of 12)s through dividing element (11) additionally sprays and acceleration towards piston head downside (18) from the pressure chamber with said oil.
6. the piston of internal-combustion engine (1); It comprises piston head (17) and cooling channel (9), and said piston head is born at least one fuel beam, and the dividing element (11) with at least one opening (16) is positioned in the said cooling channel; Between a part of wall of a part of wall of cooling channel (9) and dividing element (11), form pressure chamber (12) thus; Fill and be in the oil under the pressure said pressure chamber, it is characterized in that, said opening (16) is so directed; Feasible oil is ejected on such zone of piston head downside (18) continuously targetedly, and this zone is positioned at the opposite of directly not bearing the zone of fuel beam of piston head (17).
7. piston according to claim 6 (1); It is characterized in that; Said opening (16) is so directed, makes oil be ejected into targetedly continuously on such zone of piston head downside (18), and this zone is positioned at the opposite in the zone of directly bearing the fuel beam of piston head (17).
8. according to claim 6 or 7 described pistons (1), it is characterized in that said piston (1) has the cooling channel (9) of at least one interruption.
9. one of require described piston (1) according to aforesaid right, it is characterized in that, said dividing element (11) by the sealed connection of friction, preferably be threaded or crimping is fixed on the cooling channel (9).
10. one of require described piston (1) according to aforesaid right, it is characterized in that, said dividing element (11) is by the sealed connection of material, preferred bonding and/or be weldingly fixed on the cooling channel (9).
11., it is characterized in that said dividing element (11) is made up of a plurality of component according to one of aforesaid right requirement described piston (1).
12. according to one of aforesaid right requirement described piston (1); It is characterized in that, in cooling channel (9), pass through pressure chamber (12) that dividing element (11) constitutes via at least one seal element, preferably seal with respect to the cooling channel (9) in the piston (1) by means of at least one seal ring element (15) and/or at least one ebonite (20).
13. one of require described piston (1), it is characterized in that said opening (16) is configured to tubulose, slit-like and/or nozzle-like according to aforesaid right.
14., it is characterized in that said piston (1) comprises at least one cooling slit and/or at least one cooling hole according to one of aforesaid right requirement described piston (1).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009034775.5 | 2009-07-25 | ||
| DE102009034775 | 2009-07-25 | ||
| PCT/EP2010/004535 WO2011012273A1 (en) | 2009-07-25 | 2010-07-23 | Method for cooling a piston and a cooled piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102575614A true CN102575614A (en) | 2012-07-11 |
Family
ID=42982691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010800325592A Pending CN102575614A (en) | 2009-07-25 | 2010-07-23 | Method for cooling a piston and a cooled piston |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP2459861A1 (en) |
| JP (1) | JP2013500425A (en) |
| KR (1) | KR20120075455A (en) |
| CN (1) | CN102575614A (en) |
| DE (1) | DE102010032173A1 (en) |
| WO (1) | WO2011012273A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108350828A (en) * | 2015-11-09 | 2018-07-31 | Ks科尔本施密特有限公司 | The heat input area with the groove sidewall positioned in heat input area in piston |
| CN109441609A (en) * | 2018-12-19 | 2019-03-08 | 安徽江淮汽车集团股份有限公司 | A kind of piston cooling injection system |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011012758A1 (en) * | 2011-03-01 | 2012-09-06 | Ks Kolbenschmidt Gmbh | Cooled flask and process for its production |
| DE102011100470A1 (en) * | 2011-05-04 | 2012-11-08 | Ks Kolbenschmidt Gmbh | Method for producing a cooling channel piston and associated pistons |
| CN102878287A (en) * | 2011-09-08 | 2013-01-16 | 摩尔动力(北京)技术股份有限公司 | Piston rod mechanism |
| US8662026B2 (en) * | 2012-02-10 | 2014-03-04 | Federal-Mogul Corporation | Piston with supplemental cooling gallery and internal combustion engine therewith |
| WO2016023986A1 (en) | 2014-08-15 | 2016-02-18 | Ks Kolbenschmidt Gmbh | Cooling oil ring |
| US11650173B2 (en) * | 2019-11-01 | 2023-05-16 | Caterpillar Inc. | Grading a piston with deposits using thermal scan data |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1099734A (en) * | 1953-05-06 | 1955-09-08 | Burmeister & Wains Mot Mask | Improvements to liquid-cooled pistons |
| GB1089255A (en) * | 1964-04-16 | 1967-11-01 | Maschf Augsburg Nuernberg Ag | Liquid cooled piston |
| JPS6241919A (en) * | 1985-08-19 | 1987-02-23 | Mitsubishi Heavy Ind Ltd | Oil cooled type piston crown structure |
| CN1143715A (en) * | 1995-06-07 | 1997-02-26 | 新苏舍柴油机有限公司 | Liquid-cooled piston for reciprocating piston internal combustion engine |
| WO2007110056A1 (en) * | 2006-03-25 | 2007-10-04 | Mahle International Gmbh | Piston for an internal combustion engine |
| DE102006048929A1 (en) * | 2006-10-17 | 2008-04-24 | Deutz Ag | Internal-combustion engine, has pressure control valve arranged at output side of oil cooler and redirecting oil partial flow over direct redirection pipeline into cylinder crankcase or oil pan closing cylinder crankcase |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10141135A (en) * | 1996-11-14 | 1998-05-26 | Toyota Motor Corp | Piston of internal combustion engine |
-
2010
- 2010-07-23 JP JP2012522015A patent/JP2013500425A/en active Pending
- 2010-07-23 DE DE102010032173A patent/DE102010032173A1/en not_active Withdrawn
- 2010-07-23 KR KR1020127001821A patent/KR20120075455A/en not_active Application Discontinuation
- 2010-07-23 EP EP10737295A patent/EP2459861A1/en not_active Withdrawn
- 2010-07-23 CN CN2010800325592A patent/CN102575614A/en active Pending
- 2010-07-23 WO PCT/EP2010/004535 patent/WO2011012273A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1099734A (en) * | 1953-05-06 | 1955-09-08 | Burmeister & Wains Mot Mask | Improvements to liquid-cooled pistons |
| GB1089255A (en) * | 1964-04-16 | 1967-11-01 | Maschf Augsburg Nuernberg Ag | Liquid cooled piston |
| JPS6241919A (en) * | 1985-08-19 | 1987-02-23 | Mitsubishi Heavy Ind Ltd | Oil cooled type piston crown structure |
| CN1143715A (en) * | 1995-06-07 | 1997-02-26 | 新苏舍柴油机有限公司 | Liquid-cooled piston for reciprocating piston internal combustion engine |
| WO2007110056A1 (en) * | 2006-03-25 | 2007-10-04 | Mahle International Gmbh | Piston for an internal combustion engine |
| DE102006048929A1 (en) * | 2006-10-17 | 2008-04-24 | Deutz Ag | Internal-combustion engine, has pressure control valve arranged at output side of oil cooler and redirecting oil partial flow over direct redirection pipeline into cylinder crankcase or oil pan closing cylinder crankcase |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108350828A (en) * | 2015-11-09 | 2018-07-31 | Ks科尔本施密特有限公司 | The heat input area with the groove sidewall positioned in heat input area in piston |
| CN109441609A (en) * | 2018-12-19 | 2019-03-08 | 安徽江淮汽车集团股份有限公司 | A kind of piston cooling injection system |
| CN109441609B (en) * | 2018-12-19 | 2020-01-14 | 安徽江淮汽车集团股份有限公司 | Piston cooling injection system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102010032173A1 (en) | 2011-06-09 |
| EP2459861A1 (en) | 2012-06-06 |
| KR20120075455A (en) | 2012-07-06 |
| JP2013500425A (en) | 2013-01-07 |
| WO2011012273A1 (en) | 2011-02-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102575614A (en) | Method for cooling a piston and a cooled piston | |
| US8973548B2 (en) | Piston upper part of an assembled or welded piston with extended cooling spaces | |
| CN102388213B (en) | Piston with crown cooling jet | |
| JP6388839B2 (en) | Steel piston having cooling passage and method of constructing the same | |
| US6155157A (en) | Method and apparatus for making a two piece unitary piston | |
| EP2710247B1 (en) | Steel pistons with cooling gallery | |
| US6491013B1 (en) | Closed gallery piston having reinforced oil hole | |
| US3703126A (en) | Internal combustion engine piston | |
| CN106164455B (en) | Piston without closed cooling chamber for an internal combustion engine provided with at least one cooling oil nozzle per cylinder and method for cooling said piston | |
| JPH03502720A (en) | Engine piston assembly and forged piston member with cooling recess | |
| KR20170101933A (en) | Reduced compression height dual gallery piston, piston assembly therewith and methods of construction thereof | |
| US20150007784A1 (en) | Cylinder head having multiple cooling passages | |
| KR101450369B1 (en) | Piston with a skirt having oil flow slots | |
| CN101189424A (en) | Two-part piston for a combustion engine | |
| EP1077323B1 (en) | Cooled one piece piston and method for manufacture | |
| US20060278180A1 (en) | Piston for an internal combustion engine | |
| US20170328302A1 (en) | Piston of two-piece construction for an internal combustion engine | |
| KR20170130474A (en) | Piston with solid, light and low compression height and method of making same | |
| US20180119635A1 (en) | Piston with multi-arcuate cross-section and lubricant exhaust aperture | |
| US20230340924A1 (en) | Multi-part piston construction for an opposed-piston engine | |
| KR20140120922A (en) | Piston with enhanced cooling gallery | |
| CN111033009B (en) | Piston assembly with opposed injection regions for opposed piston engine | |
| KR20140007381A (en) | Cooled piston and method for producing it | |
| EP2971717B1 (en) | Piston and method of construction thereof | |
| KR20170107478A (en) | Piston having cooling insert for cooling galleries and method of making same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120711 |