CN1116662A - Piston of internal combustion engine and making of same - Google Patents
Piston of internal combustion engine and making of same Download PDFInfo
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- CN1116662A CN1116662A CN 95109616 CN95109616A CN1116662A CN 1116662 A CN1116662 A CN 1116662A CN 95109616 CN95109616 CN 95109616 CN 95109616 A CN95109616 A CN 95109616A CN 1116662 A CN1116662 A CN 1116662A
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Abstract
The invention provides an internal combustion engine piston, which is composed of aluminium alloy with high silicon content. The invention is characterized in that a porous anode oxidation protection film is formed adjacent to a piston pin seat part; the porous protection film is dipped by a lubricant which consists of molybdenum sulphide or fluor resin. The manufacture method of the piston is that the porous oxidation protection film is formed by the anode oxidation disposal of the surface of the piston; the oxidation protection film which is not required is removed after the oxidation protection film is dipped by the lubricant, or the oxidation protection film is formed by shading the part besides the neighbouring part of the piston pin seat and then dipped by the lubricant. As the thermal deformation of the piston pin seat part is extremely small, the movement of the piston is not disturbed even under the high temperature condition of high air fuel ratio, and the problems such as engine malfunction, etc. do not occur.
Description
The present invention relates to the piston of oil engine, particularly can prevent near the piston and the manufacture method thereof of the thermal distortion the piston boss part in pistons work.
No matter the piston that is the oil engine of two-stroke cycle or Otto cycle all at high temperature slides in cylinder.In order to improve its sliding, must improve the wear resistance of piston ring groove, proposed on the periphery of the outside that comprises the top compression ring groove, to carry out at least anodic oxidation for this reason, and the method for coating thereon or infiltration synthetic resins and lubricant (special hope clear 63-170546 number).In addition, know also that implement anodic oxidation treatment, these methods reach effect roughly in order to improve the weather resistance of piston head top to thermal stresses, mechanical stress.
Usually, piston sliding up and down in cylinder pass to insert the piston boss that is arranged on the piston in the connecting rod that is connected of wrist pin, the slip of this connecting rod passes to bent axle, and converts rotatablely moving of axle to.As the bearing of wrist pin and work, but little gap (play) is arranged at this piston boss between wrist pin and piston boss, wrist pin carries out some and moves in piston boss.If this mobile level and smooth, the slip of then transmitting piston sleekly, the rotation of engine also are level and smooth.But, as if piston boss generation thermal distortion, the not slick and sly problem that moves of wrist pin then appears.
In recent years, from the viewpoint of global environment protection, require to reduce CO, HC, the NO that discharges in the gas
xConcentration.In order to meet this requirement, the essential lean burn that increases is than (air-fuel ratio), i.e. the ratio (A/F) of the weight of air (A) and the weight (F) of fuel, if this is than increase, then temperature of combustion extremely rises.Along with the rising of temperature of combustion, the piston head top produces high temperature, and this high temperature passes to piston boss, causes the thermal distortion of piston boss.Because this piston boss generation thermal distortion, the rotation of the wrist pin in piston boss becomes irregular, owing to this reason, causes the slip of piston in cylinder unusual, the problem that occurs blocking etc.That is, under the working conditions that air-fuel ratio is not too big resembling in the past, discharge CO, HC, NO in the gas
xThe concentration height, the mobile of wrist pin is level and smooth, and cylinder and blocking of piston etc. also be difficult for to be taken place, if still reduction CO, HC, NO
xConcentration and the air-fuel ratio that improves, then temperature of combustion rises, and makes the piston head top be in high temperature, also becomes high temperature by its heat passage piston boss.
The inventor finds that the high temperatureization of this piston boss causes the inhomogeneous thermal distortion of piston boss.Follow this thermal distortion, moving freely of wrist pin hindered, and then the slip of the slyness of piston and cylinder hindered, and this situation for example produces blocking and generating heat deadlockedly of cylinder wall and piston, also just becomes the reason of motor fault.
In general, if the parts of the simple shape resemble the round shape, Yin Wendu rises, and internal diameter etc. evenly reduce (dwindling), in the case, for example if do more greatly, can remove the influence of thermal distortion in the inside diameter ranges that allows.But, under the situation that resembles the parts of complicated shape the piston, in fact produce uneven distortion, be difficult to prediction, infer deformation extent that it is difficult seeking countermeasure.The aperture of piston boss is in fact mostly to be Φ 14-16mm, and the thermal expansivity of AC8A commonly used is about 19 * 10 in piston material
-6(℃
-1).That is, even temperature several times rises, the piston boss aperture just produces several microns irregular deformation, surpasses the fair equal difference in the gap in wrist pin diameter and piston boss aperture, and the slyness that has hindered wrist pin moves.For example, improved 10% o'clock in air-fuel ratio, tens of degree because the temperature at piston head top rises partly produce the temperature rise in several years and begin distortion at piston boss thus.In view of the present situation that air-fuel ratio must be improved about 10%, because the burning of high-temperature zone, not only the diameter of piston boss but also wrist pin also expands, the moving of extreme limit wrist pin.This situation is also brought baneful influence to the slyness that piston slides, and causes and " blocks " between piston and cylinder inner wall and " it is deadlocked to generate heat ", not only upsets the rotation of engine, and causes the breakage of piston, cylinder, wrist pin etc.The inventor has held the cause-effect relationship of these a series of situations, thereby has finished the present invention.
This problem all can take place in foru cycle engine and two-stroke-cycle engine, but especially easier generation in two-stroke-cycle engine.
Crown portion and positions such as piston ring groove or skirt of piston in the past piston, in order to improve thermotolerance and wear resistance, handle though carry out hard alumina membrane, on piston boss and piston pin hole periphery, do not carry out the example that hard alumina membrane is handled, do not have the idea of the improvement of this part.
Therefore the objective of the invention is to address the above problem, even the piston with the piston boss that also is difficult for thermal distortion under hot conditions and the manufacture method of this piston are provided.
The invention provides a kind of internal combustion engine, it is characterized in that partly locating to form the porous anode protective membrane, infiltration oilness material on this porous protection film near piston boss.As above-mentioned oilness material, molybdenum sulphide or fluorine resin etc. is an ideal.
In addition; the invention provides a kind of manufacture method of internal combustion engine; this method is made up of following operation: utilize the once electrolytic method to form the porous anode protective membrane on the whole surface of piston; then on this porous protection film or utilize re-electrolysis method infiltration molybdenum sulphide; or the fluorine resin that on above-mentioned porous protection film, infiltrates; then, utilize near machinery, physics or the chemical means grinding surface in addition of piston boss part at least, remove above-mentioned porous protection film.
In addition; the present invention also provides a kind of manufacture method of internal combustion engine; this method is made up of following operation: after utilizing adhesive tape or coating with near the surface shaded in addition of piston boss part; forming porous anode protective membrane on the surface by anodic oxidation near the piston boss part; the oilness material that infiltration is made up of molybdenum sulphide or fluorine resin on this porous protection film is peeled off above-mentioned adhesive tape or coating hovel then.
Internal combustion engine of the present invention is owing to be provided with the porous anode protective membrane near the piston boss part; and lubricant infiltrates in this film; even so in the burning of the high-temperature zone of high air-fuel ratio; also can prevent the thermal distortion of piston boss part and thermal softening etc.; the slyness of wrist pin and piston boss is slided, is moved when keeping engine rotation, keeps the normal rotation of engine continuously for a long time.In addition, because non-oxidation protective membrane in skirt of piston beyond piston boss part and the crown portion, so can prevent to follow the temperature of piston motion to rise.
Brief description of drawings
Fig. 1 is front elevation (1A), side elevational view (1B) and the ground plan (1C) of an example of expression piston of the present invention.
Fig. 2 is front elevation (2A), side elevational view (2B) and the ground plan (2C) of other examples of expression piston of the present invention.
Fig. 3 is the graphic representation that is illustrated in the bench teat condition in the test example 2.
Enumerate object lesson below, explain the present invention with reference to accompanying drawing.
Fig. 1 is the figure of an example of expression piston of the present invention, is the piston that foru cycle engine is used.In Fig. 1, piston 1 is made the roughly cup-shaped that is made of the crown portion 5 of an end of skirt of piston cylindraceous 4 and this skirt of piston 4 of sealing roughly.On the periphery of above-mentioned skirt of piston 4, form first ring embedded groove 2b and the oil ring embedded groove 2a successively from direction near above-mentioned crown portion 5.And skirt of piston 4 forms two planes that are parallel to each other below above-mentioned oil ring embedded groove 2a, these two planar separately central part form communicating pores.These communicating poress are co-axial mutually, and the piston boss 3 of wall projecting shape is set around each communicating pores.
The material of the piston 1 that this foru cycle engine is used can be the material that in the past used in foru cycle engine, but it is desirable to contain the metal casting material of a large amount of silicon (Si), for example preferably be called the aluminium alloy of the high silicon content of AC8A, Lo-Ex.These are the materials that contain 12-23%Si.
Fig. 2 is the figure of other examples of expression piston of the present invention, is two kinds of pistons that cycle engine is used.In Fig. 2, piston 1 is also made the roughly cup-shaped that is made of the crown portion 5 of an end of skirt of piston cylindraceous 4 and this skirt of piston 4 of sealing roughly.
On the periphery of above-mentioned skirt of piston 4, form the first ring embedded groove 2b, second ring embedded groove 2c and the oil ring embedded groove 2a successively from direction near above-mentioned crown portion 5.And, below above-mentioned oil ring embedded groove 2a, making the piston boss 3 that forms mutual co-axial communicating pores on the skirt of piston 4.Under the situation of two-stroke-cycle engine, compare with foru cycle engine, because be easy to generate the rising that increases the temperature of combustion cause owing to air-fuel ratio, preferably be provided for oilhole that engine oil supplies with and near the groove of the skirt of piston of piston boss etc.
The material of the piston 1 that this two-stroke-cycle engine is used can be the material that in the past used in two-stroke-cycle engine, but it is desirable to contain the metal casting material of a large amount of silicon (Si), for example preferably is called the aluminium alloy of the high silicon content of AC9A, AC9B.These are the materials that contain 19-23%Si.
Though it is not shown, but the foru cycle engine of Fig. 1 with the two-stroke-cycle engine of piston and Fig. 2 with the arbitrary occasion in the piston, in the communicating pores of piston boss 3, all insert wrist pin, a near end of the installing connecting rods axial mid point of this wrist pin is so that piston and connecting rod slide together.At this, piston boss 3 works as the bearing of the wrist pin that inserts.Have, the other end of connecting rod is connected with bent axle again, and piston is that the slip of connecting rod converts rotatablely moving of bent axle to.
The feature of piston 1 of the present invention is all to be made of the aluminium alloy of above-mentioned the sort of high silicon content, and also forms the porous protective oxide layer near the surface its piston boss 3 parts, and infiltration has lubricant in this porous protective oxide layer.Here, be meant the close part of wrist pin inboard in the hole of piston boss at least and insertion near the so-called piston boss part, it is desirable to the inboard and peripheral surface, hole of piston boss.For example in example illustrated in figures 1 and 2, it is desirable to the part that applies point fully as near the piston boss part.
As the lubricant that is infiltrated up in the above-mentioned porous protective oxide layer; can enumerate in the past the molybdenum sulphides such as ucon oils such as natural oils, fluorine resin, diester and polysiloxane, lubricating grease or moly-sulfide that use as lubricant etc., wherein preferred molybdenum sulphide or fluorine resin.
Piston of the present invention because the aluminium alloy that uses high silicon content as its material, so in light weight, the physical strength height, thermotolerance is also good.
In addition, near piston of the present invention several microns hardening oxidation protective membranes of the lining piston boss part to tens of micron thickness.Because the thermal expansivity of this protective oxide layer is the about 1/5 of aluminium alloy, so can suppress near the thermal distortion the piston boss part at least.For example, when piston head top firing to 400 ℃, utilize this protective oxide layer to give full play to the effect that suppresses thermal expansion.
On near the whole hard porous protective oxide layer that forms the piston boss part of piston of the present invention, also have lubricants such as molybdenum sulphide.Therefore, with only the situation of application of lubricating was different in the past, when wearing away this protective oxide layer, can keep good lubricity and wear resistance to completely dissolve.Promptly be suitable for the purposes under such serious abrasion condition such as engine.
Especially when using molybdenum sulphide as lubricant; known piston boss protective oxide layer partly by this molybdenum sulphide of infiltration contacts with wrist pin; steel and sulfide reaction; form the sulfurized layer of steel such as iron on the steel surface of wrist pin, perhaps molybdenum sulphide self is transferred on the steel surface.Therefore, kept the sliding of the slyness of piston boss and wrist pin, prevented to have prevented because the gap between piston boss and the wrist pin changes the fault in the slip that produces because of air-fuel ratio increases the rise thermal distortion of the piston boss that causes of afterfire temperature.
The manufacture method of internal combustion engine of the present invention is described in detail in detail below.
In first kind of manufacture method of the present invention; at first; near at least piston boss part of aluminium alloy, promptly on the surface of gudgeon-pin bearing part and pin-and-hole peripheral part, form the porous protective oxide layer by anodic oxidation treatment as the piston of material with high silicon content.Specifically, near the electrolytic solution that immerses the piston boss at least of the piston part by the solution composition of mineral acid such as sulfur acid, oxalic acid or organic acid or its mixture, carry out electrolysis as anode with this piston.Make the surperficial oxidized of the piston portion that contacts with electrolytic solution at least by this electrolysis, form the porous anode protective membrane.At this moment, by adjusting conditions such as electrolysis time and Faradaic current value, make the thickness of porous protective oxide layer reach gratifying several microns to tens of microns.
Then, the lubricant that on the porous protective oxide layer that forms like this, infiltrates.As this lubricant, it is desirable to use molybdenum sulphide or fluorine resin.
When using molybdenum sulphide, for example prepare dissolving ammonium molybdate ((NH
4)
2MoS
4) wait molybdenum sulphide and electrolytic solution, the part that forms the porous protective oxide layer at least of piston is immersed in this electrolytic solution, carry out electrolysis with it as anode.By this electrolysis, will be present in the MoS that has negative charge in the electrolytic solution
4 2-Move to as the anodic piston side, carry out oxidation in the hole of the protective oxide layer that on piston face, forms, on whole porous protective oxide layer, separate out so-called molybdenum sulphide MoS equably with oilness
2
Using the occasion of fluorine resin, for example can behind coating fluorine resin emulsion paint, heat, also can under heating condition, spray the fluorine resin powder and make its fusion and infiltrate.
So on the porous protective oxide layer, after the infiltration lubricant, remove the porous protective oxide layer that beyond the piston boss part of piston, forms, obtain piston of the present invention.As the method for removing the porous protective oxide layer, suitably use machinery, physics or chemical grinding method etc.
For mechanical mill, it is desirable to use milling drum to carry out such as lathe one class, if use this mechanical grinding method, then obtain level and smooth and beautiful grinding surface.
For the physics grinding, it is desirable to use and spray the sand-blast etc. that hard particles such as alundum, corundum carry out grinding, this method is suitable for mass production.In addition, the grinding surface that is obtained by this method is because roughening a little, so thermal diffusivity is good, oiliness also improves.
For chemical grinding, it is desirable to utilize alkali lye to carry out grinding such as caustic soda one class.This chemical grinding of utilizing alkali lye can utilize pen contact etc. that grinding is carried out at the position that alkali lye only is coated on regulation, can carry out the grinding of thin limitedly.
In addition, also can these method appropriate combination be used according to applying portion.
In second kind of manufacture method of the present invention, at first, with piston boss in addition the surface shaded of masking material with piston.It is desirable to carry out this covering with adhesive tape or coating.
As the adhesive tape that uses in covering, the ideal adhesive tape has following character: having acid resistance, alkali resistance, is electrical insulating property, and when having certain intensity, binding property is good, and when peeling off not residual binder.For example, can enumerate at vinylchlorid, polyethylene, vinylidene chloride, other resin films and on such as the resin film of fluorine resin film one class coating adhesive and adhesive tape.As this class adhesive tape, suitable is for example with the vinylchlorid of day Dong Diangongshe system as the adhesive tape SPV-214 of support or SPV-224 etc.Use the masking methods of adhesive tape not need special shading unit, have the advantage that to cover easily, still, also exist recess and thin to cover situation of difficult.
As the coating that in covering, uses, ideal coating has acid resistance, alkali resistance, is electrical isolation, and dried coating tunicle has intensity to a certain degree, but in general, can enumerate acrylic acid or the like, polystyrene type, paraffin class, polyorganosiloxane resin class, fluorine resin class coating etc.This masking methods can will be coated on as above-mentioned that class coating on the piston boss part surface in addition, and drying can be covered on complicated shape and thin effectively then.But, when covering, have following shortcoming: anchor clamps that need be used for being coated with and instrument, need time of drying, need peel off exsiccant coating tunicle with organic solvent in final operation with these coating.Therefore, preferably carry out the combination of above-mentioned adhesive tape method and coating method easy and effectively cover.
With the piston that so covers by carrying out anodic oxidation treatment with method identical described in above-mentioned first kind of manufacture method, near the formation porous protective oxide layer piston boss part.Then, on this porous protective oxide layer, press and method identical described in first kind of manufacture method infiltration lubricant.
At last, peel off the masking material that covers beyond the piston boss part, obtain piston of the present invention.In the occasion of using adhesive tape to cover, only just need peel off and to remove this adhesive tape easily.With the occasion of filming and covering, this is filmed be dissolved in the organic solvent and remove.Can be according to the solvability of used coating suitable selective solvent.
In addition, in manufacture method of the present invention, even near the part beyond piston boss part, also can be vulnerable to the part of significant thermal distortion when the work, during in work with the cylinder strong friction easy abrasive part, extremely difficult part of covering carry out with near piston boss identical anodic oxidation treatment partly, lubricant infiltrates.Specifically, though such part is different because of the shape of piston, comprise for example bump of the hole periphery of piston boss.
With the aluminium alloy casting of high silicon content foru cycle engine piston shown in Figure 1.The diameter of the crown portion of this piston is made 56mm, and the length of piston is made 59mm.
Equally, with the aluminium alloy casting of high silicon content two-stroke-cycle engine piston shown in Figure 2.The diameter of the crown portion of this piston is made 49mm, and the length of piston is made 45mm.
Then, as anode, as negative electrode,, on the whole surface of piston, form thick several microns to tens of microns porous protective oxide layer with these pistons by carrying out electrolysis in 10-60 minute in the aqueous sulfuric acid in 20% (weight) with stereotype.
Again with the piston that forms the porous protective oxide layer as anode, as negative electrode,, molybdenum sulphide is infiltrated up in the porous protective oxide layer with stainless steel plate by in the electrolytic solution that contains 0.1% (weight) ammonium molybdate, carrying out electrolysis in 10 minutes.
With near (part that adds point among Fig. 1 and Fig. 2) surface in addition surperficial upper piston key seat part of these pistons of lathe grinding, remove the porous protective oxide layer, obtain piston of the present invention.
Embodiment 2
By the method cast pistons identical, on whole surface, form the porous protective oxide layer with embodiment 1.
Coating fluorine resin dispersion paints on these pistons is by the heat drying fluorine resin that infiltrates in the porous protective oxide layer.
With near the surface in addition of surperficial upper piston key seat part of these pistons of lathe grinding, remove the porous protective oxide layer, obtain piston of the present invention.
By the method cast pistons identical with embodiment 1, after forming the porous protective oxide layer on the whole surface, the infiltration molybdenum sulphide.
Utilize the sand-blast that sprays the corundum hard particles, the physics grinding is carried out near the surface beyond the surperficial upper piston key seat part of these pistons, remove the porous protective oxide layer, obtain piston of the present invention.
By the method cast pistons identical with embodiment 1, after forming the porous protective oxide layer on the whole surface, the infiltration molybdenum sulphide.
With near the surface in addition of surperficial upper piston key seat part that 3% caustic soda is handled these pistons, remove protective oxide layer, to handle with 1% nitric acid, the caustic soda that neutralization is adhered to is also removed, and obtains piston of the present invention.
By the method cast pistons identical with embodiment 1.Stickup vinyl chloride resin bonding film covers near beyond piston boss part the surface.
These pistons are carried out anodic oxidation treatment by the method identical with embodiment 1, form the porous protective oxide layer, by same electrolysis treatment infiltration molybdenum sulphide.
Then, remove the vinyl chloride resin bonding film, wipe tackiness agent, obtain piston of the present invention.
Embodiment 6
By the method cast pistons identical with embodiment 1.Near piston boss part, be coated with polystyrene paint, heat drying in addition the surface.
These pistons are carried out anodic oxidation treatment by the method identical with embodiment 1, form the porous protective oxide layer, by same electrolysis treatment infiltration molybdenum sulphide.
Then, filming of polystyrene paint is dissolved in the solvent (toluene) and removes, obtain piston of the present invention.
Test example 1
Prepare the piston (amounting to 6 kinds) of following condition.
Condition 2. be cast as with condition 1 piston-shaped identical, by piston boss and piston boss hole periphery anodic oxidation treatment being formed the piston of thick 15 microns porous protective oxide layer.
Use these pistons, except that piston, use identical materials to make Otto cycle and two-stroke-cycle engine, with than common in the past air-fuel ratio (numerical value: when 10) improving 5%, 10%, 15% air-fuel ratio and carry out work, estimate the thermal distortion degree of piston boss qualitatively.The results are shown in the table 1.In table 1, sample 1 is the result of the foru cycle engine gained of the expression piston that uses shape shown in Figure 1, and sample 2 is results of the two-stroke-cycle engine gained of the expression piston that uses shape shown in Figure 2.In addition, symbol in the table 1 is the evaluation result that expression produces by the part of the piston boss after the observation work, ◎ is the situation that thermal distortion does not take place fully, the 0th, though after slip, see the influence of some thermal distortion, but complete unimpeded situation in the practicality is out of question though △ is the short-term use, then produces the situation of the problem in the practicality in life-time service, * be even that the short-term use also is dangerous, * * be complete unpractical situation.
Can find out that from these results though untreated piston just is subjected to the influence of some thermal distortion in air-fuel ratio in the past, the courage short-term is used and is fine.But if air-fuel ratio improves 5%, then the influence of thermal distortion is big, also is impossible even short-term is used.In the occasion of the piston that only has protective oxide layer, even air-fuel ratio improves 5%, the influence of thermal distortion also is little, can use in a short time.In piston,, also can use on essentially no problem ground even air-fuel ratio improves 15% with protective oxide layer and molybdenum sulphide infiltration treatment combination.In addition, even the occasion of the fluorine resin that infiltrates also obtains roughly the same result replacing molybdenum sulphide.[table 1]
Evaluation result
But, ◎: the influence of not temperature distortion fully.
Zero: be subjected to the influence of some thermal distortion.
△: the influence of temperature distortion, practical in a short time going up do not have obstruction, but life-time service then has problems.
*: heat hands over the influence of first shape big, also is a problem even short-term is used.
The influence of * *: thermal distortion is very big, from beginning serious problems is just arranged.
Test example 2
In order further to confirm effect of the present invention, carry out bench teat with 750 cc of air refrigerative foru cycle engines.The condition of bench teat as shown in Figure 3.In Fig. 3, the longitudinal axis be revolution (rev/min), transverse axis be the time (hour).But, with the full torque of 10,000 rev/mins of conducts.
Piston is made with AC8A (12%Si), and wrist pin is finished external diameter through superfinishing and ground with SCM 422 manufacturings, carburizing and quenching.
The piston boss hole, Sample A: after the boring, polish precision work; Sample B: after the boring, form protective oxide layer and the lubricant that infiltrates (molybdenum sulphide), polish precision work again according to the present invention.
About these samples, represent that with vary in diameter 100 hours wear loss after the off-test are as follows:
Sample A: pin external diameter 22 μ m, internal diameter 25 μ m in piston boss hole amount to 47 μ m.
Sample B: pin external diameter 9 μ m, internal diameter 10 μ m in piston boss hole amount to 19 μ m.
From these results as can be seen, piston of the present invention is compared with the piston of not handling, and the gap variation of wrist pin and piston boss is suppressed to about 40%.If the distortion of the sort of degree of sample B, then thinking has sufficient marketable value by the practical complete no problem of.
As mentioned above, piston boss of the present invention has following effect at least:
1. owing near the porous oxidation diaphragm that forms the piston boss part infiltrates Lubricants such as molybdenum sulphide and produce piston boss and contact with piston boss with piston pin Cylinder inner wall between lubricant effect.
2. the molybdenum sulphide owing near the infiltration piston boss part contacts with piston pin And the lubricant that is created in the piston pin surface shifts and tells on.
3. owing to the thermal coefficient of expansion of protective oxide layer is that the part of aluminium alloy is produced Give birth to the effect that suppresses thermal expansion.
In these effects, 1 lubricant effect is especially significant.
Claims (4)
1. the piston of oil engine; it is the internal combustion engine that the aluminium alloy by high silicon content constitutes; it is characterized in that near the piston boss part, forming the porous anode protective membrane, and the lubricant that infiltration is made up of molybdenum sulphide or fluorine resin on this porous protection film.
2. the manufacture method of internal combustion engine; it is characterized in that this method is made up of following operation: near the surface the part of piston boss at least of the internal combustion engine that will be made of the aluminium alloy of high silicon content is carried out anodic oxidation treatment and is formed the operation of porous protective oxide layer; by electrolysis infiltration molybdenum sulphide on the above-mentioned porous protective oxide layer or on this porous protective oxide layer the operation of infiltration fluorine resin, near and the operation of the porous protective oxide layer of the part formation of grinding beyond removing piston boss part.
3. the manufacture method of internal combustion engine; it is characterized in that this method is made up of following operation: near in addition the surface of the part piston boss part of the internal combustion engine that the aluminium alloy by high silicon content constitutes; the masking material that uses adhesive tape or coating to constitute covers the operation on the surface of this part; near the above-mentioned piston boss part surface carried out anodic oxidation treatment and form the operation of porous protective oxide layer; by the operation of electrolysis at the infiltration molybdenum sulphide on the above-mentioned porous protective oxide layer or the fluorine resin that on this porous protective oxide layer, infiltrates, and the operation of removing above-mentioned masking material.
4. the described internal combustion engine of claim 1, the aluminium alloy that it is characterized in that above-mentioned high silicon content is that silicone content is the aluminium alloy of 12-23%.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP188986/1994 | 1994-07-20 | ||
| JP18898694A JP2923434B2 (en) | 1994-07-20 | 1994-07-20 | Piston for internal combustion engine and method of manufacturing the same |
| JP188986/94 | 1994-07-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1116662A true CN1116662A (en) | 1996-02-14 |
| CN1062940C CN1062940C (en) | 2001-03-07 |
Family
ID=16233393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95109616A Expired - Fee Related CN1062940C (en) | 1994-07-20 | 1995-07-20 | Piston of internal combustion engine and making of same |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2923434B2 (en) |
| KR (1) | KR0138683B1 (en) |
| CN (1) | CN1062940C (en) |
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| JP6490491B2 (en) * | 2015-05-15 | 2019-03-27 | 株式会社豊田中央研究所 | Covering member and manufacturing method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2549516B2 (en) * | 1987-01-05 | 1996-10-30 | 株式会社フジクラ | Internal combustion engine piston and method of manufacturing the same |
| CN1102693A (en) * | 1994-08-17 | 1995-05-17 | 王亚平 | Wear-proof high hardness piston ring and its prodn. technique |
-
1994
- 1994-07-20 JP JP18898694A patent/JP2923434B2/en not_active Expired - Fee Related
-
1995
- 1995-07-05 KR KR1019950019673A patent/KR0138683B1/en not_active IP Right Cessation
- 1995-07-20 CN CN95109616A patent/CN1062940C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303249C (en) * | 1999-04-28 | 2007-03-07 | 铃木株式会社 | Coating film sliding parts and piston |
| CN1301345C (en) * | 2004-02-26 | 2007-02-21 | 陈刚 | Hardencing anode treating process of electronic actuator |
| CN101314865B (en) * | 2007-12-28 | 2010-06-09 | 中国兵器工业第五二研究所 | Production method for hard lubricant film layer of aluminum alloy |
| CN101376999B (en) * | 2008-10-08 | 2011-09-07 | 北京创毅视讯科技有限公司 | Composite oxidation method for metallic products |
| CN103080386A (en) * | 2010-08-25 | 2013-05-01 | 丰田自动车株式会社 | Internal combustion engine and method of producing same |
| CN103080386B (en) * | 2010-08-25 | 2015-07-08 | 丰田自动车株式会社 | Internal combustion engine and method of producing same |
| CN103890363A (en) * | 2011-10-21 | 2014-06-25 | 马勒国际有限公司 | Piston |
| CN102363894A (en) * | 2011-11-16 | 2012-02-29 | 上海瑞尔实业有限公司 | Local anodic oxidation method for surface of workpiece |
| CN115247603A (en) * | 2022-03-09 | 2022-10-28 | 广州汽车集团股份有限公司 | Hydrogen engine piston and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0828346A (en) | 1996-01-30 |
| CN1062940C (en) | 2001-03-07 |
| JP2923434B2 (en) | 1999-07-26 |
| KR0138683B1 (en) | 1998-05-01 |
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