CN1902381A - Valve seat for engine and cylinder head for engine - Google Patents
Valve seat for engine and cylinder head for engine Download PDFInfo
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- CN1902381A CN1902381A CN 200480028417 CN200480028417A CN1902381A CN 1902381 A CN1902381 A CN 1902381A CN 200480028417 CN200480028417 CN 200480028417 CN 200480028417 A CN200480028417 A CN 200480028417A CN 1902381 A CN1902381 A CN 1902381A
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- cylinder head
- assembling carrier
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Abstract
A valve seat for an engine capable of solving a problem with a conventional one wherein since an engine fuel formed mainly of alcohol may contain a rather large quantity of water as compared with conventional gasoline and light oil, there is the possibility of entry of water content in a clearance between an intake valve seat and the fitted receiving part of a cylinder head to which the valve seat is fitted when the engine fuel formed mainly of alcohol is led, together with air, into a cylinder through an intake port having the intake valve seat. A plating layer (14) is formed on the surface of a ferrous valve seat body (17) fitted to the fitted receiving part (13) formed in the intake port (6) of the aluminum alloy cylinder head (2). Since the plating layer (14) is provided between the cylinder head (2) and the valve seat body (17), galvanic corrosion can be prevented by reducing, through water, a potential difference between dissimilar metals, i.e., between the fitted receiving part (13) and the valve seat body (17).
Description
Technical field
The present invention relates to valve seat for engine and manufacture method thereof and motor cylinder head.
Background technique
In the prior art,, open as the spy that flat 7-133705 communique, spy are opened clear 58-77114 communique, the spy opens clear 58-77116 communique, be well known that: because by on the valve base surface of making by iron-base sintered alloy, forming with Fe as this product
3O
4Be the iron oxide film of main body, and wear resistance performance is improved, and then can reduce the other side's aggressiveness, so can be used as the particularly air-breathing valve seat of using that is difficult to produce the height output internal-combustion engine of combustion products as diesel engine, LPG motor etc.Moreover, be well known that: can tackle once sintered sintered alloy is implemented be machined to after infiltration is handled roughly finish size after, carry out oxidation processes and obtain valve seat, can obtain the LPG machine or the Hydrogen machine of raising of wear resistance performance of the patina of the raising of thermal conductivity of infiltration coating and valve bearing surface thus.And then, be well known that: can tackle behind press forming and sintering, after being assembled in the sintered alloy-made valve seat that is processed into given size on the cylinder head, implementing steam treatment and form LPG machine, Hydrogen machine or high plumbous petrol engine or the exhaust gas re-circulation apparatus (E.G.R.) of patina.
In recent years, being that the power fuel of main component is popularized as discharging the cleaner alcohol of gas.Such fuel and air are imported in the firing chamber via intakeport together, then with air-breathing close with valve the air-breathing usefulness that is located on the intakeport air-breathing with valve seat after, combustion fuel acquisition power.With exhaust with valve open the exhaust that be located at exhaust port with valve seat discharge gas thereafter.
Patent documentation 1: the spy opens flat 7-133705 communique
Patent documentation 2: the spy opens clear 58-77114 communique
Patent documentation 3: the spy opens clear 58-77116 communique
Summary of the invention
In addition, above-mentioned be in the power fuel of main component with alcohol, compare with existing gasoline or diesel oil and to contain many moisture, therefore exist and followingly worry: with alcohol be the power fuel of main component with air when possessing air-breathing intakeport and import in the cylinder with valve seat, moisture immerses air-breathing with valve seat be assembled with gap between the assembling carrier of cylinder head of this valve seat.If moisture is clipped in air-breathing with in the gap between valve seat and its assembling carrier like this, then exist and followingly worry: to assemble carrier with valve seat and its be dissimilar metal air-breathing, for example air-breathing is ferrous metal with valve seat, assembling carrier even cylinder head are under the situation of dissimilar metal contact of aluminium metalloid, produce galvanic corrosion.That is, above-mentioned galvanic corrosion is meant if dissimilar metal contact and moisture is arranged between them then produce electricity, the metal erosion of negative side, and the aluminium side becomes negative side and produces corrosion in aluminium and iron.This result is to worry to lead to the hole of cooling water channel owing to corrosion forms from the assembling carrier on cylinder head.
Yet, in above-mentioned prior art, on valve seat, form iron oxide film etc. in order to improve wear resistance performance etc., but can not stop the galvanic corrosion that on using, produces with the motor of alcohol as the power fuel of main component.
In addition, exist and followingly to worry: such galvanic corrosion also produces on valve seat in the assembling carrier of exhaust end oral-lateral and exhaust.
The problem that solves is, purpose is to provide a kind of valve seat for engine and manufacture method and motor cylinder head, even be when being easy to generate the combination of dissimilar metal of galvanic corrosion, also can stop galvanic corrosion in air-breathing usefulness or exhaust with valve seat and its assembling carrier.
The invention of technological scheme 2 is all valve seats of a kind of motor, it is characterized in that, be located at the valve seat body of assembling on the carrier, be provided with coating with above-mentioned assembling carrier surface in opposite directions at least, described assembling carrier is arranged on the intakeport or relief opening of cylinder head
The invention of technological scheme 3 such as technological scheme 1 or 2 described valve seat for engine is characterized in that, the standard electrode potential of above-mentioned coating is arranged between the electrode potential of the electrode potential of above-mentioned valve seat body and above-mentioned assembling carrier.
The invention of technological scheme 4 is a kind of motor cylinder head, is located at the intakeport of cylinder head or the assembling carrier on the relief opening is provided with valve seat, it is characterized in that, is formed with coating on the surface of above-mentioned assembling carrier.
The invention of technological scheme 5 is a kind of motor cylinder head, is located at the intakeport of cylinder head or the assembling carrier on the relief opening is provided with valve seat, it is characterized in that, above-mentioned assembling carrier with above-mentioned valve seat surface in opposite directions on be formed with coating.
The invention of technological scheme 6 such as technological scheme 4 or 5 described motor cylinder head is characterized in that, the standard electrode potential of above-mentioned coating is arranged between the electrode potential of the electrode potential of above-mentioned valve seat and above-mentioned assembling carrier.
The invention of technological scheme 7 is a kind of motor cylinder head, is located at the intakeport of cylinder head or the assembling carrier on the relief opening is provided with valve seat, it is characterized in that, is formed with coating respectively on the surface of the surface of above-mentioned assembling carrier and above-mentioned valve seat.
The invention of technological scheme 8 is a kind of motor cylinder head, be located at the intakeport of cylinder head or the assembling carrier on the relief opening is provided with valve seat, it is characterized in that, above-mentioned assembling carrier with above-mentioned valve seat surface in opposite directions on be formed with coating, and above-mentioned valve seat with above-mentioned assembling carrier surface in opposite directions on be formed with coating.
The invention of technological scheme 9 such as technological scheme 7 or 8 described motor cylinder head, it is characterized in that, the material of the coating of above-mentioned assembling carrier is set to the material of the coating of above-mentioned valve seat: electrode potential is identical or much at one, or increases according to the order of the electrode potential of the above-mentioned valve seat of the electrode potential of the coating of the electrode potential of the coating of the electrode potential of the above-mentioned cylinder head of aluminium class, above-mentioned assembling carrier, above-mentioned valve seat, iron class.
The invention of technological scheme 10 is a kind of valve seat for engine, it is characterized in that, the surface of the valve seat body that is provided with on the assembling carrier of the intakeport of being located at cylinder head or exhaust port is provided with isolation layer, and above-mentioned valve seat body is made by iron class alloy, and above-mentioned isolation layer is the iron oxide film.
The invention of technological scheme 11 is a kind of valve seat for engine, it is characterized in that, be located at the valve seat body of assembling on the carrier, be provided with isolation layer with above-mentioned assembling carrier surface in opposite directions at least, described assembling carrier is arranged on the intakeport or relief opening of cylinder head, above-mentioned valve seat body is made by iron class alloy, and above-mentioned isolation layer is the iron oxide film.
The invention of technological scheme 12 is manufacture methodes of a kind of valve seat, described valve seat is arranged on the intakeport or the assembling carrier on the relief opening of being located at cylinder head, it is characterized in that, after forming isolation layer on the whole surface of valve seat body, this valve seat body is assembled on the above-mentioned assembling carrier, remove the above-mentioned isolation layer of the seat surface that is positioned at valve seat body, and process above-mentioned seat surface thereafter.
The manufacture method of the invention of technological scheme 13 such as technological scheme 12 described valve seats is characterized in that above-mentioned valve seat body is made by iron class alloy, steam treatment is carried out on its surface and forms iron oxide film as isolation layer.
The invention of technological scheme 14 is a kind of valve seat for engine, it is characterized in that, forms the coating layer that electrical insulation is used on the surface of being located at the valve seat body on the assembling carrier, and described assembling carrier is arranged on the intakeport or relief opening of cylinder head.
The invention of technological scheme 15 is a kind of valve seat for engine, it is characterized in that, be located at the valve seat body of assembling on the carrier, be provided with the coating layer that electrical insulation is used with above-mentioned assembling carrier surface in opposite directions at least, described assembling carrier is arranged on the intakeport or relief opening of cylinder head.
The invention of technological scheme 16 is a kind of motor cylinder head, is located at the intakeport of cylinder head or the assembling carrier on the relief opening is provided with valve seat, it is characterized in that, forms the coating layer that electrical insulation is used on the surface of above-mentioned assembling carrier.
The invention of technological scheme 17 such as technological scheme 14 or 15 described valve seat for engine is characterized in that above-mentioned coating layer is a ceramic coating layer.
The invention of technological scheme 18 such as technological scheme 16 described motor cylinder head is characterized in that above-mentioned coating layer is a ceramic coating layer.
The invention of technological scheme 19 such as technological scheme 14 or 15 described valve seat for engine is characterized in that above-mentioned coating layer is the polyflon layer.
The invention of technological scheme 20 such as technological scheme 16 described motor cylinder head is characterized in that above-mentioned coating layer is the polyflon layer.
The invention of technological scheme 21 such as technological scheme 16 described motor cylinder head is characterized in that above-mentioned cylinder head is made by aluminum alloy, and above-mentioned coating layer is the pellumina processing layer.
In the invention of technological scheme 1, because by the coating that is located at the valve seat body surface, coating is clipped between the assembling carrier and valve seat body of cylinder head, so the potential difference that minimizing assembling carrier and valve seat body produce via water can stop galvanic corrosion.
In the invention of technological scheme 2, by be located at valve seat body at least with assembling carrier lip-deep coating in opposite directions, exist on the face that contact possibility with valve seat body at the assembling carrier of cylinder head coating is set, reduce the potential difference of assembling carrier and valve seat body, can stop galvanic corrosion.
In the invention of technological scheme 3,, can reduce the potential difference between coating and the assembling carrier by the coating that is located on the valve seat as far as possible.
In the invention of technological scheme 4, owing on the surface of assembling carrier, be formed with coating,, reduce the potential difference that assembling carrier and valve seat body produce via water so coating is clipped between the assembling carrier and valve seat body of cylinder head, can stop galvanic corrosion.
In the invention of technological scheme 5, since the assembling carrier with above-mentioned valve seat surface in opposite directions on be formed with coating, so exist on the face that contacts possibility with valve seat body at the assembling carrier of cylinder head coating be set, reduce the potential difference of assembling carrier and valve seat body, can stop galvanic corrosion.
In the invention of technological scheme 6, can reduce the potential difference between coating and the valve seat as far as possible.
In the invention of technological scheme 7, on the assembling carrier of cylinder head and valve seat, clamped coating respectively, reduce the potential difference that assembling carrier and valve seat body produce via water, can stop galvanic corrosion.
In the invention of technological scheme 8, in opposite directions the surface respectively of assembling carrier and valve seat, be formed with coating, reduce the potential difference of assembling carrier and valve seat body, can stop galvanic corrosion.
In the invention of technological scheme 9, because being separately positioned on the assembling carrier is set to coating on the valve seat: its electrode potential increases according to the order of the electrode potential of the above-mentioned valve seat of the electrode potential of the coating of the electrode potential of the coating of the electrode potential of the above-mentioned cylinder head of same or similar material or aluminium class, above-mentioned assembling carrier, above-mentioned valve seat, iron class, so can reduce the potential difference between the coating of the coating of assembling carrier and valve seat as far as possible.
In the invention of technological scheme 10,,, can stop galvanic corrosion so the dissimilar metal of assembling carrier and valve seat body does not exist via contacting of water generates owing between the assembling carrier of cylinder head and valve seat body, accompany isolation layer.
In the invention of technological scheme 11, have in the assembling carrier and the valve seat body of cylinder head on the face of the possibility of contacting isolation layer is set, the dissimilar metal of assembling carrier and valve seat body contacts and does not exist, and can stop galvanic corrosion.
In the invention of technological scheme 12, owing to can carry out the removal of iron oxide film of seat surface of valve seat body and the processing of seat surface simultaneously, so in manufacturing process, can not make lavishly.
In the invention of technological scheme 13, utilize steam treatment can form the iron oxide film with comparalive ease as isolation layer.
In the invention of technological scheme 14, by coating layer being set on the valve seat body surface, because coating layer is clipped between the assembling carrier and valve seat body of cylinder head,, can stop galvanic corrosion so the dissimilar metal of assembling carrier and valve seat body does not exist via contacting of water generates.
In the invention of technological scheme 15, by the coating layer that is provided with assembling carrier surface in opposite directions at least in valve seat body, have in the assembling carrier of cylinder head and valve seat body on the face of the possibility of contacting coating layer is set, the dissimilar metal of assembling carrier and valve seat body contacts and does not exist, and can stop galvanic corrosion.
In the invention of technological scheme 16,,,, can stop galvanic corrosion so the dissimilar metal of assembling carrier and valve seat does not exist via contacting of water generates because coating layer is clipped between cylinder head and the valve seat body by coating layer being set at the assembling carrier.
In the invention of technological scheme 17,18, making coating layer is ceramic coating layer, and pottery is clipped between the assembling carrier and valve seat body of cylinder head, and the dissimilar metal of assembling carrier and valve seat body does not exist via contacting of water generates, can stop galvanic corrosion.
In the invention of technological scheme 19,20, making coating layer is the polyflon layer, the polyflon layer is clipped between the assembling carrier and valve seat body of cylinder head, and the dissimilar metal of assembling carrier and valve seat body does not exist via contacting of water generates, can stop galvanic corrosion.
In the invention of technological scheme 21, making coating layer is the pellumina processing layer, the pellumina processing layer is clipped between the assembling carrier and valve seat body of cylinder head, and the dissimilar metal of assembling carrier and valve seat body does not exist via contacting of water generates, can stop galvanic corrosion.
Description of drawings
Fig. 1 is the sectional view of expression the 1st mode of execution of the present invention.
Fig. 2 is the sectional view of the major component of expression the 1st mode of execution of the present invention.
Fig. 3 is the instruction card of the standard electrode potential of expression the 1st mode of execution of the present invention.
Fig. 4 is the sectional view of expression the 2nd mode of execution of the present invention.
Fig. 5 is the sectional view of the major component of expression the 2nd mode of execution of the present invention.
Fig. 6 is the sectional view of expression the 3rd mode of execution of the present invention.
Fig. 7 is the sectional view of the major component of expression the 3rd mode of execution of the present invention.
Fig. 8 is the sectional view of expression the 4th mode of execution of the present invention.
Fig. 9 is the sectional view of the major component of expression the 4th mode of execution of the present invention.
Figure 10 is the sectional view of the manufacturing process of expression the 4th mode of execution of the present invention.
Figure 11 is the sectional view of major component of the manufacturing process of expression the 4th mode of execution of the present invention.
Figure 12 is the stereogram of test of the iron oxide film that is undertaken by steam treatment of expression the 4th mode of execution of the present invention.
Figure 13 is the sectional view of expression the 5th mode of execution of the present invention.
Figure 14 is the sectional view of the major component of expression the 5th mode of execution of the present invention.
Figure 15 is the sectional view of expression the 6th mode of execution of the present invention.
Figure 16 is the sectional view of the major component of expression the 6th mode of execution of the present invention.
Symbol description
2 cylinder head
6 intakepories
13 22 32 assembling carriers
14 23 33 34 coating
17 valve seat body
21 31 valve seats
41 assembling carriers
42 iron oxide films (isolation layer)
45 valve seat body
60 70 valve seats
61 71 assembling carriers
62 72 coating layers
65 valve seat body
Embodiment
Below explanation among the present invention valve seat for engine and manufacture method and motor with each mode of execution of cylinder head.
Mode of execution 1
Fig. 1-Fig. 3 represents the 1st mode of execution, and the cylinder head 2 that is fixed on the cylinder 1 of not shown reciprocating motion of the pistons is that aluminum alloy is made, and suction port 3 is set and at opposite side exhaust port 4 is set in the one side.In addition, in suction port 3, on the intakeport 6 of firing chamber, air-breathing usefulness valve seat 7 is set, and air-breathing with this air-breathing valve seat 7 of using of valve 8 switchings.Same, in exhaust port 4, be provided with on the intakeport 9 of firing chamber 5 air-breathingly with valve seat 10, and exhaust opens and closes these exhausts with valve seats 10 with valve 11.And then on cylinder head 2, cooling water channel 12 is located between suction port 3 and the exhaust port 4.
Air-breathing assembling carrier 13 with valve seat 7 is set on above-mentioned intakeport 6.This assembling carrier 13 forms concavity, and its diameter is embedded with air-breathing with valve seat 7 on this assembling carrier 13 less times greater than the diameter of suction port 3.
Iron class above-mentioned air-breathing with valve seat 7 for external diameter with assemble the identical ring-type of the identical and internal diameter of carrier 13 and suction port 3, made by iron-base sintered alloy.In addition, with above-mentioned assembling carrier 13 face in opposite directions, covered in the air-breathing usefulness valve seat 7 by coating 14.The standard electrode potential of coating 14 is arranged between the electrode potential of the electrode potential of valve seat body 17 described later and above-mentioned assembling carrier 13.That is, so-called electrode potential is meant electrode, and soaks the voltage that exists between the solution of electrode or electrolyte, usually and the standard electrode of picture hydrogen electrode relatively.Fig. 3 represents the standard electrode voltage of metal.Because the standard electrode potential (E of aluminium
H) be-1.337V, so the standard electrode potential (E of aluminum alloy system cylinder head 2
H) be approximately-1.3V about, and the standard electrode potential of iron class valve seat body 17 is-0.42V about, so as coating 14, be preferably standard electrode potential and assembling carrier 13 roughly the same aluminum or aluminum alloy, standard electrode potential Zn (about standard electrode potential-0.76V) or Cr (about standard electrode potential-0.56V) or the Al-Zn in the middle of being arranged on, Cr class composite deposite, Zn class composite deposite.In addition, Cr class composite deposite is Al
2O
3Be dispersed in plating in the metal coating Deng ceramic particle or PTFE resin particles such as (teflon), have both corrosion resistance and wear resistance performance.In addition, its thickness is 50 dusts-100 micron, preferably the 1-100 micron is air-breathing with peripheral part 14a on the outer circumferential face of valve seat 7 and the abutting part 14b that is positioned at suction port 3 sides except being located at, and also is formed with chamfered section 14c on the bight that is formed at assembling carrier 13 sides.In addition, air-breathing is that the conical surface in axle center is formed on the seat surface 15 with becoming with Aspirating valves 8 towards the face of firing chamber 5 in the valve seat 7, does not form coating 14 on this seat surface 15, moreover, can coating 14 be set on inner peripheral surface 16 or coating 14 is not set.
Next air-breathing manufacture method and installation method with valve seat be described.Air-breathing with valve seat 7, in the Fe powder, fully mix all or part of of Fe-Si powder, Ni powder, Co powder, Mo powder, Fe-W powder, Fe-Cr powder, Cu powder, Fe-Nb powder, Fe-V powder and C powder, the mixed-powder that obtains is carried out the mould press-powder to be shaped, with the mould press-powder formed body that common condition sintering obtains, make to have and form the valve seat body 17 that identical in fact one-tenth is grouped into cooperation.
And then, on peripheral part 14a, the abutting part 14b of these valve seat body 17 and chamfered section 14c, form coating 14.Be assembled on the cylinder head 2 with valve seat 7 air-breathing then.This assembling is carried out in the following manner: air-breathing with valve seat 7 be pressed into, shrunk fit cooperates or shrink-fit on assembling carrier 13.Air-breathing seat surface 15 with valve seat 7 to assembling carries out machining then, makes and air-breathingly is close to seat surface 15 with valve 8.
Next about above-mentioned formation its effect is described.Containing many moisture and be that the power fuel of main component and air are when importing in the cylinder 1 by suction port together with alcohol, if moisture is invaded air-breathing gap S and delay with valve seat 7 and assembling carrier 13, then cylinder head 2 contacts via this water with valve seat 7 with air-breathing, and this result has to produce the dissimilar metal contact and produce the worry of galvanic corrosion.Yet, because the surface of assembling carrier 13 sides in air-breathing valve seat body 17, form by the coating made from the identical or similar material of the material of cylinder head 2 14, so can suppress the generation of galvanic corrosion.
As mentioned above, in the above-described embodiment, by on the surface of iron class valve seat body 17, being formed with coating 14, this iron class valve seat body 17 is arranged on the assembling carrier 13 on the intakeport 6 of the aluminum alloy system of being located at cylinder head 2, coating 14 is clipped between cylinder head 2 and the valve seat body 17, so reduce potential difference, can stop galvanic corrosion via the dissimilar metal of the assembling carrier 13 of water generates and valve seat body 17.
Moreover, by coating 14 is located at valve seat body at least with above-mentioned assembling carrier 13 surface in opposite directions on, on the face that contacts possibility coating 14 is set and exist in assembling carrier 13 and valve seat body 17, reduce the potential difference of the dissimilar metal of assembling carrier 13 and valve seat body 17, can stop galvanic corrosion.
And, the electrode potential that is located at the coating 14 on the valve seat body 17 is configured to and the electrode potential of above-mentioned assembling carrier 13 is roughly the same or between the electrode potential of the electrode potential of above-mentioned valve seat body 17 and above-mentioned assembling carrier 13, can reduce the potential difference between coating 14 and the assembling carrier 13 as far as possible.
Other mode of executions below are described.In other embodiments, the part identical with above-mentioned the 1st mode of execution used same mark, omit its detailed description.
Mode of execution 2
Fig. 4-Fig. 5 represents the 2nd mode of execution.Air-breathing assembling carrier 22 with valve seat 21 is set on the intakeport 6 that is located on the cylinder head 2, on this assembling carrier 22, is embedded with air-breathing with valve seat 21.Above-mentioned air-breathing with valve seat 21, make by iron-base sintered alloy, for external diameter with assemble the identical ring-type of the identical and internal diameter of carrier 22 and suction port 3.
In addition, on assembling carrier 22, coating 23 is set.This coating 23 is located at air-breathing forward surface with valve seat 21, promptly on 23a of inner peripheral surface portion and the bottom surface sections 23b.The electrode potential of coating 23 is arranged between the electrode potential of the electrode potential of valve seat body 21 and above-mentioned assembling carrier 22.That is standard electrode potential (the E of aluminum alloy system cylinder head 2,
H) be-1.3V about, the standard electrode potential of iron class valve seat body 21 is-0.42V about, so as coating 23, be preferably standard electrode potential and be arranged on middle Zn (about standard electrode potential-0.76V) or Cr (about standard electrode potential-0.56V), or Al-Zn, Cr class composite deposite, Zn class composite deposite.
Therefore, containing many moisture and be that the power fuel of main component and air are when importing in the cylinder 1 by suction port together with alcohol, if moisture is invaded air-breathing gap S and delay with valve seat 7 and assembling carrier 13, then cylinder head 2 contacts via this water with valve seat 7 with air-breathing, and this result has to produce the dissimilar metal contact and produce the worry of galvanic corrosion.Yet, owing to form the coating 23 that reduces potential difference on the surface of assembling carrier 22 sides, so can suppress the generation of galvanic corrosion.
As mentioned above, in the above-described embodiment, owing on the assembling carrier 13 on the intakeport 6 of the aluminum alloy system of being located at cylinder head 2, coating 23 is set, across coating 23 valve seat 21 is set in addition, so coating 23 is clipped between cylinder head 2 and the valve seat 21, reduce the potential difference of the dissimilar metal of assembling carrier 22 and valve seat 21, can stop galvanic corrosion.
Moreover, by coating 23 is located at the assembling carrier 22 in valve seat 21 surface in opposite directions on, on the face that contact possibility coating 23 is set and exist, reduces the potential difference of the dissimilar metal of assembling carrier 22 and valve seat 21, can stop galvanic corrosion at assembling carrier 22 and valve seat 21.
And, between the electrode potential by the standard electrode potential that is located at the coating 23 on the valve seat 21 being arranged on above-mentioned valve seat 21 and the electrode potential of above-mentioned assembling carrier 22, can reduce the potential difference between coating 23 and the assembling carrier 22 as far as possible.
Mode of execution 3
Fig. 6-Fig. 7 represents the 3rd mode of execution.Air-breathing assembling carrier 32 with valve seat 31 is set on the intakeport 6 that is located on the cylinder head 2, on this assembling carrier 32, is embedded with air-breathing with valve seat 31.Above-mentioned air-breathing with valve seat 31, make by iron-base sintered alloy, for external diameter with assemble the identical ring-type of the identical and internal diameter of carrier 22 and suction port 3.
In addition, in valve seat 31 with the assembling carrier 32 in opposite directions face and the assembling carrier 32 in valve seat 31 face in opposite directions on, coating 33,34 is set respectively.Coating 33 is air-breathing with peripheral part 33a on the outer circumferential face of valve seat 31 and the abutting part 33b that is positioned at suction port 3 sides except being located at, and also is formed with chamfered section 33c on the bight that is formed at assembling carrier 32 sides.Coating 34 is located at air-breathing forward surface with valve seat 31, and promptly on 34a of inner peripheral surface portion and the bottom surface sections 34b, the material of coating 33,34 is same or similar material so that make electrode potential identical or much at one.Moreover, the material of coating 33,34 is arranged to: electrode potential (1.33V), the electrode potential of the coating 34 of the Zn of above-mentioned assembling carrier 32 (0.76V), the electrode potential of the coating 33 of the Cr of above-mentioned valve seat 31 (0.56V), the electrode potential of the above-mentioned valve seat 31 of iron class (order electrode potential increase 0.42V) of pressing the above-mentioned cylinder head 2 of aluminum alloy.
Therefore, containing many moisture and be that the power fuel of main component and air are when importing in the cylinder 1 by suction port together with alcohol, if moisture is invaded air-breathing gap S and delay with valve seat 31 and assembling carrier 32, then cylinder head 2 contacts via this water with valve seat 31 with air-breathing, and this result has to produce the dissimilar metal contact and produce the worry of galvanic corrosion.Yet, owing on the surface of assembling carrier 32 sides, form the coating 33,34 that reduces potential difference, so can suppress the generation of galvanic corrosion.
As mentioned above, in the above-described embodiment, owing on valve seat 31 and assembling carrier 32, coating 33,34 is set respectively, so coating 33,34 is clipped between cylinder head 2 and the valve seat 31, reduce the potential difference of the dissimilar metal of assembling carrier 32 and valve seat 31, can stop galvanic corrosion.
And, coating 33,34 is arranged to: the electrode potential of pressing the coating of the electrode potential of the coating of the electrode potential of the above-mentioned cylinder head of same or similar material or aluminium class, above-mentioned assembling carrier, above-mentioned valve seat, the order of the electrode potential of the above-mentioned valve seat of iron class increases, and can reduce the potential difference between the coating 33,34 thus as far as possible.
Mode of execution 4
Fig. 8-Figure 12 represents the 4th mode of execution.In suction port 3, on the intakeport 6 of firing chamber 5, air-breathing usefulness valve seat 40 is set, and air-breathing with this air-breathing valve seat 40 of using of valve 8 switchings.On above-mentioned intakeport 6, be provided with air-breathing assembling carrier 41 with valve seat 40.This assembling carrier 41 forms concavity and the diameter diameter less times greater than suction port 3, is embedded with air-breathing with valve seat 40 on this assembling carrier 41.
Above-mentioned air-breathing with valve seat 40, for external diameter with assemble the identical and internal diameter of carrier 41 and ring-type that suction port 3 is roughly the same.In addition, air-breathing with in the valve seat 40 with above-mentioned assembling carrier 41 forward surface in opposite directions, be utilized steam (water vapour) handle form with Fe as isolation layer
3O
4 Iron oxide film 42 coverings for main body.The thickness of iron oxide film 42 is the 1-50 micron, 3-20 micron preferably, air-breathing except being located at peripheral part 42a on the outer circumferential face of valve seat 40 and the abutting part 42b that is positioned at suction port 3 sides, also on the bight that is formed at assembling carrier 41 sides, be formed with chamfered section 42c.In addition, air-breathing is that the conical surface in axle center is formed on the seat surface 43 with becoming with Aspirating valves 8 towards the face of firing chamber 5 in the valve seat 40, does not form the iron oxide film on this seat surface 43, moreover, can the iron oxide film be set on inner peripheral surface 44 or the iron oxide film is not set.
Next air-breathing manufacture method with valve seat is described.Air-breathing with valve seat 40, in the Fe powder, fully mix all or part of of Fe-Si powder, Ni powder, Co powder, Mo powder, Fe-W powder, Fe-Cr powder, Cu powder, Fe-Nb powder, Fe-V powder and C powder, the mixed-powder that obtains is carried out the mould press-powder as material powder to be shaped, with the mould press-powder formed body that common condition sintering obtains, make to have and form the valve seat body 45 that identical in fact one-tenth is grouped into cooperation.In addition, as required and then carry out making valve seat body 45 by correcting the press process that compacting carries out.
And then, by under the set point of temperature in 500-550 ℃ the scope for example, these valve seat body 45 being carried out 30-120 minute steam treatment, except peripheral part 42a, abutting part 42b, chamfered section 42c, also on seat surface 43 or inner peripheral surface 44, also form above-mentioned iron oxide film 42.This iron oxide film 42 has for example density 6.8g/cm
3, hardness HRB50, tensile strength 400N/cm
2, the characteristic of range of extension 1.5%.
Be assembled on the cylinder head 2 with valve seat 40 air-breathing then.This assembling is carried out in the following manner: air-breathing with valve seat 40 be pressed into, shrunk fit cooperates or shrink-fit to assembling carrier 41.Air-breathing seat surface 43 with valve seat 40 to assembling carries out machining then, makes and air-breathingly is close to seat surface 43 with valve 8.This machining, use cutting instrument 48, these instrument 48 one possess the Aspirating valves guide cuts that a plurality of valve guide portion 8a that are located at the Aspirating valves 8 on the cylinder head 2 and valve seat 40 are implemented concentric cutting and add the Ministry of worker 46 and valve seat cutting portion 47, with axle center Z is the rotating center rotation, add the inner peripheral surface that the Ministry of worker 46 processes valve guide portion 8a by the Aspirating valves guide cuts, remove the iron oxide film 42 that is positioned at seat surface 43 by valve seat cutting portion 47 simultaneously.
Next about above-mentioned formation its effect is described.Containing many moisture and be that the power fuel of main component and air are when importing in the cylinder 1 by suction port together with alcohol, if moisture is invaded air-breathing gap S and delay with valve seat 40 and assembling carrier 41, then cylinder head 2 contacts via this water with valve seat 40 with air-breathing, and this result has to produce the dissimilar metal contact and produce the worry of galvanic corrosion.Yet, have the iron oxide film 42 of electrical insulation effect owing to form on the surface of assembling carrier 41 sides in air-breathing valve seat body 45, so can suppress the generation of galvanic corrosion.
Next the test of the iron oxide film that is formed by steam treatment is described with reference to Figure 12.This is to be produced on the two sides of iron class sintering body 49 of diameter 60mm, thickness 20mm to form and do not form iron oxide film 42 by steam treatment, the electrode 50 that copper sheet is made is set on a face of each test film then, and copper sheet is set on another face another electrode 51 is set, then insulating-resistance meter 52 is connected between two electrodes, measures resistance between the two.This result is, under the situation that does not have the iron oxide film, resistance value is 0.3-1.0 ohm, and is relative therewith, and under the situation that iron oxide film 42 is arranged, resistance value becomes 10-40 ohm, can confirm the insulating properties that iron oxide film 42 brings.
As mentioned above, in the above-described embodiment, form iron oxide film 42 by surface in iron class valve seat body 45, this iron class valve seat body 45 is located on the assembling carrier 41 that is provided with on the intakeport 6 of aluminum alloy system cylinder head 2, iron oxide film 42 is clipped between cylinder head 2 and the valve seat body 45, so the dissimilar metal of assembling carrier 13 and valve seat body 17 can not contact via water, can stop galvanic corrosion.
Moreover, by iron oxide film 42 be located at valve seat body at least with above-mentioned assembling carrier 41 surface in opposite directions on, on the face that contacts possibility iron oxide film 42 is set and exist in assembling carrier 41 and valve seat body 45, the dissimilar metal of assembling carrier 41 and valve seat body 45 can not contact, and can stop galvanic corrosion.
And then above-mentioned valve seat body 45 is made by iron class alloy, is iron oxide film 42 by making isolation layer, can form isolation layer with comparalive ease.
And, behind the iron oxide film 42 of whole surface formation as isolation layer of valve seat body 45, by this valve seat body 45 is assembled on the above-mentioned assembling carrier 41, remove the above-mentioned iron oxide film 42 of the seat surface 43 that is positioned at valve seat body 45 and process above-mentioned seat surface 43 thereafter, can be assembled into the valve seat body 45 that whole surface is provided with iron oxide film 42 on the assembling carrier 41 with maintaining the original state, when being coaxial shape ground processing seat surface 43 with valve 8, can remove the iron oxide film 42 that is positioned at seat surface 43, therefore, can carry out the removal of iron oxide film 42 of seat surface 43 and the fine finishing of seat surface 43 simultaneously, therefore in manufacturing process, can not make lavishly.
Moreover valve seat body 45 is made by iron class alloy, by its surface being carried out steam treatment and forming iron oxide film 42 as isolation layer, can form isolation layer with comparalive ease.
Mode of execution 5
Figure 13-Figure 14 represents the 5th mode of execution.In suction port 3, on the intakeport 6 of firing chamber 5, air-breathing usefulness valve seat 60 is set, and air-breathing with this air-breathing valve seat 60 of using of valve 8 switchings.On above-mentioned intakeport 6, be provided with air-breathing assembling carrier 61 with valve seat 60.This assembling carrier 61 forms concavity and the diameter diameter less times greater than suction port 3, is embedded with air-breathing with valve seat 60 on this assembling carrier 61.
Above-mentioned air-breathing with valve seat 60, for external diameter with assemble the identical and internal diameter of carrier 61 and ring-type that suction port 3 is roughly the same, make by iron-base sintered alloy.In addition, air-breathing with in the valve seat 60 with the forward surface of above-mentioned assembling carrier 61, covered with coating layer 62 by the electrical insulation of pottery.The coating layer 62 of pottery uses gas phase paint-on techniques such as plasma CVD (chemical vapor coating method), ion plating to be provided with, and is for example diamond-like-carbon (DLC), PVD coatings such as TiCN, TiAlN, Al
2O
3, SiC, Si
3N
4, Al
2O
3Deng CVD coating etc., its thickness is 50 dusts-100 micron, preferably the 1-50 micron is air-breathing with peripheral part 62a on the outer circumferential face of valve seat 60 and the abutting part 62b that is positioned at suction port 3 sides except being located at, and also is formed with chamfered section 62c on the bight that is formed at assembling carrier 61 sides.In addition, air-breathing is that the conical surface in axle center is formed on the seat surface 63 with becoming with Aspirating valves 8 towards the face of firing chamber 5 in the valve seat 60, does not form coating layer 62 on this seat surface 63, moreover, can coating layer 62 be set on inner peripheral surface 16 or coating layer 62 is not set.
Next air-breathing manufacture method and installation method with valve seat be described.Air-breathing with valve seat 60, in the Fe powder, fully mix all or part of of Fe-Si powder, Ni powder, Co powder, Mo powder, Fe-W powder, Fe-Cr powder, Cu powder, Fe-Nb powder, Fe-V powder and C powder, the mixed-powder that obtains is carried out the mould press-powder as material powder to be shaped, with the mould press-powder formed body that common condition sintering obtains, make to have and form the valve seat body 65 that identical in fact one-tenth is grouped into cooperation.
And then, on peripheral part 62a, the abutting part 62b of these valve seat body 65 and chamfered section 62c, form coating layer 62.Be assembled on the cylinder head 2 with valve seat 60 air-breathing then.This assembling is carried out in the following manner: air-breathing with valve seat 60 be pressed into, shrunk fit cooperates or shrink-fit to assembling carrier 61.Air-breathing seat surface 63 with valve seat 60 to assembling carries out machining then, makes and air-breathingly is close to seat surface 63 with valve 8.
Next about above-mentioned formation its effect is described.Containing many moisture and be that the power fuel of main component and air are when importing in the cylinder 1 by suction port together with alcohol, if moisture is invaded air-breathing gap S and delay with valve seat 60 and assembling carrier 61, then cylinder head 2 contacts via this water with valve seat 60 with air-breathing, and this result has to produce the dissimilar metal contact and produce the worry of galvanic corrosion.Yet because the surface of assembling carrier 61 sides in air-breathing valve seat body 65, formation has the coating layer 62 of electrical insulation effect, so can suppress the generation of galvanic corrosion.
As mentioned above, in the above-described embodiment, form the coating layer 62 that electrical insulation is used by surface in iron class valve seat body 65, this iron class valve seat body 65 is located on the assembling carrier 61 that is provided with on the intakeport 6 of aluminum alloy system cylinder head 2, coating layer 62 is clipped between cylinder head 2 and the valve seat body 65, so the dissimilar metal of assembling carrier 61 and valve seat body 65 can not contact via water, can stop galvanic corrosion.
Moreover, by coating layer 62 is located at valve seat body 65 at least with above-mentioned assembling carrier 61 surface in opposite directions on, on the face that contacts possibility coating layer 62 is set and exist in assembling carrier 61 and valve seat body 65, the dissimilar metal of assembling carrier 61 and valve seat body 65 can not contact, and can stop galvanic corrosion.
And, by forming coating layer 62, can carry out the electrical insulation between cylinder head 2 and the valve seat body 65 reliably with pottery.
Mode of execution 6
Figure 15-Figure 16 represents the mat woven of fine bamboo strips 6 mode of executions.Be located on the cylinder head 2 intakeport 6 on air-breathing assembling carrier 71 with valve seat 70 is set, on this assembling carrier 71, be embedded with air-breathing usefulness valve seat 70.Above-mentioned air-breathing with valve seat 70, make by iron-base sintered alloy, for external diameter with assemble the identical ring-type of the identical and internal diameter of carrier 71 and suction port 3.
In addition, on assembling carrier 71, be provided with the same electrical insulation of making by pottery of the 5th mode of execution with coating layer 72.This coating layer 72 is located at air-breathing forward surface with valve seat 70, is on 72a of inner peripheral surface portion and the bottom surface sections 72b.
Therefore, containing many moisture and be that the power fuel of main component and air are when importing in the cylinder 1 by suction port together with alcohol, if moisture is invaded air-breathing gap S and delay with valve seat 70 and assembling carrier 71, then cylinder head 2 contacts via this water with valve seat 70 with air-breathing, and this result has to produce the dissimilar metal contact and produce the worry of galvanic corrosion.Yet, have the coating layer 72 of electrical insulation effect owing on the surface of assembling carrier 71 sides, form, so can suppress the generation of galvanic corrosion.
As mentioned above, in the above-described embodiment, by on the assembling carrier 71 on the intakeport 6 of the aluminum alloy system of being located at cylinder head 2, coating layer 72 being set, across coating layer 72 iron class valve seat 70 is set in addition, so the coating layer of being made by pottery 72 is clipped between cylinder head 2 and the valve seat 70, the contacting of dissimilar metal of assembling carrier 71 and valve seat 70 do not exist, and can stop galvanic corrosion.
Moreover, by coating layer 72 is located at the assembling carrier 71 in valve seat 70 surface in opposite directions on, on the face that contact possibility coating layer 72 is set and exist at assembling carrier 71 and valve seat 70, the contacting of dissimilar metal of assembling carrier 71 and valve seat 70 do not exist, and can stop galvanic corrosion.
And, by forming coating layer 72, can carry out the electrical insulation between cylinder head 2 and the valve seat body 65 reliably with pottery.
Mode of execution 7
Mode of execution 7 replaces pottery and is formed the coating layer of the valve seat in the above-mentioned mode of execution 5 by polyflon (PTFE) layer.This polyflon layer has characteristics such as excellent electrical insulating property, flame retardancy.
Therefore, containing many moisture and be that the power fuel of main component and air are when importing in the cylinder by suction port together with alcohol, if moisture is invaded air-breathing gap S and delay with valve seat and assembling carrier, then cylinder head contacts via this water with valve seat with air-breathing, and this result has to produce the dissimilar metal contact and produce the worry of galvanic corrosion.Yet, owing to have the polyflon layer of electrical insulation effect air-breathing formation on valve seat, so can suppress the generation of galvanic corrosion.
As mentioned above, in the above-described embodiment,,, can stop galvanic corrosion so there is not the contact of dissimilar metal between cylinder head and the valve seat owing to be provided with the polyflon layer.
Mode of execution 8
Mode of execution 8 replaces pottery and is formed the coating layer of the assembling carrier in the above-mentioned mode of execution 6 by polyflon (PTFE) layer.This polyflon layer has characteristics such as excellent electrical insulating property, flame retardancy.
Therefore, containing many moisture and be that the power fuel of main component and air are when importing in the cylinder by suction port together with alcohol, if moisture is invaded air-breathing gap S and delay with valve seat and assembling carrier, then cylinder head contacts via this water with valve seat with air-breathing, and this result has to produce the dissimilar metal contact and produce the worry of galvanic corrosion.Yet, owing to have the polyflon layer of electrical insulation effect air-breathing formation on valve seat, so can suppress the generation of galvanic corrosion.
As mentioned above, in the above-described embodiment,,, can stop galvanic corrosion so there is not the contact of dissimilar metal between cylinder head and the valve seat owing to be provided with the polyflon layer.
Mode of execution 9
Mode of execution 9 replaces pottery and is formed the coating layer of the assembling carrier on the cylinder head 2 of the aluminum alloy system that is located in the above-mentioned mode of execution 6 by the pellumina processing layer (anodic oxidation processing layer) of electrical insulating property.
Therefore, containing many moisture and be that the power fuel of main component and air are when importing in the cylinder by suction port together with alcohol, if moisture is invaded air-breathing gap S and delay with valve seat and assembling carrier, then cylinder head contacts via this water with valve seat with air-breathing, and this result has to produce the dissimilar metal contact and produce the worry of galvanic corrosion.Yet, owing to have the pellumina processing layer of electrical insulation effect air-breathing formation on valve seat, so can suppress the generation of galvanic corrosion.
As mentioned above, in the above-described embodiment,,, can stop galvanic corrosion so there is not the contact of dissimilar metal between cylinder head and the valve seat owing to be provided with the pellumina processing layer.
Claims
(according to the modification of the 19th of treaty)
1. (after the revisal) a kind of valve seat for engine, it is characterized in that, on the surface that is flush-mounted in the valve seat body on the assembling carrier of concavity, form coating, prevention contacts the galvanic corrosion that causes because of the assembling carrier place of the concavity of above-mentioned cylinder head with the dissimilar metal of valve seat, and described assembling carrier is arranged on the intakeport or relief opening of cylinder head.
2. (after the revisal) a kind of valve seat for engine, it is characterized in that, be flush-mounted in valve seat body on the assembling carrier of concavity, be formed with coating at least with on the above-mentioned assembling carrier surface in opposite directions, prevention contacts the galvanic corrosion that causes because of the assembling carrier place of the concavity of above-mentioned cylinder head with the dissimilar metal of valve seat, and described assembling carrier is arranged on the intakeport or relief opening of cylinder head.
3. valve seat for engine as claimed in claim 1 or 2 is characterized in that, the standard electrode potential of above-mentioned coating is arranged between the electrode potential of the electrode potential of above-mentioned valve seat body and above-mentioned assembling carrier.
4. (after the revisal) a kind of motor cylinder head, on the assembling carrier of the concavity of the intakeport of being located at cylinder head or relief opening, be embedded with valve seat, it is characterized in that, on the surface of the assembling carrier of above-mentioned concavity, be formed with coating, stop assembling carrier place to contact the galvanic corrosion that causes with the dissimilar metal of valve seat because of the concavity of above-mentioned cylinder head.
5. (after the revisal) a kind of motor cylinder head, on the assembling carrier of the concavity of the intakeport of being located at cylinder head or relief opening, be embedded with valve seat, it is characterized in that, the assembling carrier of above-mentioned concavity with above-mentioned valve seat surface in opposite directions on be formed with coating, stop assembling carrier place to contact the galvanic corrosion that causes with the dissimilar metal of valve seat because of the concavity of above-mentioned cylinder head.
6. as claim 4 or 5 described motor cylinder head, it is characterized in that the standard electrode potential of above-mentioned coating is arranged between the electrode potential of the electrode potential of above-mentioned valve seat and above-mentioned assembling carrier.
7. (after the revisal) a kind of motor cylinder head, on the assembling carrier of the concavity of the intakeport of being located at cylinder head or relief opening, be embedded with valve seat, it is characterized in that, on the surface of the surface of the assembling carrier of above-mentioned concavity and above-mentioned valve seat, form coating respectively, stop assembling carrier place to contact the galvanic corrosion that causes with the dissimilar metal of valve seat because of the concavity of above-mentioned cylinder head.
8. (after the revisal) a kind of motor cylinder head, on the assembling carrier of the concavity of the intakeport of being located at cylinder head or relief opening, be embedded with valve seat, it is characterized in that, the assembling carrier of above-mentioned concavity with above-mentioned valve seat surface in opposite directions on be formed with coating, and above-mentioned valve seat with above-mentioned assembling carrier surface in opposite directions on be formed with coating, stop assembling carrier place to contact the galvanic corrosion that causes with the dissimilar metal of valve seat because of the concavity of above-mentioned cylinder head.
9. as claim 7 or 8 described motor cylinder head, it is characterized in that, the material of the coating of above-mentioned assembling carrier is made as with the material of the coating of above-mentioned valve seat: electrode potential is identical or much at one, or increases according to the order of the electrode potential of the above-mentioned valve seat of the electrode potential of the coating of the electrode potential of the coating of the electrode potential of the above-mentioned cylinder head of aluminium class, above-mentioned assembling carrier, above-mentioned valve seat, iron class.
10. (after the revisal) a kind of valve seat for engine, it is characterized in that, on the surface that is flush-mounted in the valve seat body on the assembling carrier of concavity, isolation layer is set, above-mentioned valve seat body is made by iron class alloy, above-mentioned isolation layer is the iron oxide film, prevention contacts the galvanic corrosion that causes because of the assembling carrier place of the concavity of above-mentioned cylinder head with the dissimilar metal of valve seat, and described assembling carrier is arranged on the intakeport or relief opening of cylinder head.
(11. after the revisal) a kind of valve seat for engine, it is characterized in that, be flush-mounted in valve seat body on the assembling carrier of concavity, at least with on the assembling carrier surface in opposite directions of above-mentioned concavity isolation layer is set, above-mentioned valve seat body is made by iron class alloy, above-mentioned isolation layer is the iron oxide film, prevention contacts the galvanic corrosion that causes because of the assembling carrier place of the concavity of above-mentioned cylinder head with the dissimilar metal of valve seat, and described assembling carrier is arranged on the intakeport or relief opening of cylinder head.
The manufacture method of (12. after the revisal) a kind of valve seat, described valve seat is inlaid on the assembling carrier of concavity of the intakeport of being located at cylinder head or relief opening, it is characterized in that, after forming isolation layer on the whole surface of valve seat body, this valve seat body is inlaid on the assembling carrier of above-mentioned concavity, remove the above-mentioned isolation layer of the seat surface that is positioned at valve seat body thereafter, and process above-mentioned seat surface, prevention contacts the galvanic corrosion that causes because of the assembling carrier place of the concavity of above-mentioned cylinder head with the dissimilar metal of valve seat.
13. the manufacture method of valve seat as claimed in claim 12 is characterized in that, above-mentioned valve seat body is made by iron class alloy, steam treatment is carried out on its surface and forms iron oxide film as isolation layer.
(14. after the revisal) a kind of valve seat for engine, it is characterized in that, on the surface that is flush-mounted in the valve seat body on the assembling carrier of concavity, form the coating layer that electrical insulation is used, prevention contacts the galvanic corrosion that causes because of the assembling carrier place of the concavity of above-mentioned cylinder head with the dissimilar metal of valve seat, and described assembling carrier is arranged on the intakeport or relief opening of cylinder head.
(15. after the revisal) a kind of valve seat for engine, it is characterized in that, be flush-mounted in valve seat body on the assembling carrier of concavity, at least with on the assembling carrier surface in opposite directions of above-mentioned concavity the coating layer that electrical insulation is used is set, prevention contacts the galvanic corrosion that causes because of the assembling carrier place of the concavity of above-mentioned cylinder head with the dissimilar metal of valve seat, and described assembling carrier is arranged on the intakeport or relief opening of cylinder head.
(16. after the revisal) a kind of motor cylinder head, on the assembling carrier of the concavity of the intakeport of being located at cylinder head or relief opening, be embedded with valve seat, surface at the assembling carrier of above-mentioned concavity forms the coating layer that electrical insulation is used, and stops the assembling carrier place because of the concavity of above-mentioned cylinder head to contact the galvanic corrosion that causes with the dissimilar metal of valve seat.
17., it is characterized in that above-mentioned coating layer is a ceramic coating layer as claim 14 or 15 described valve seat for engine.
18. motor cylinder head as claimed in claim 16 is characterized in that above-mentioned coating layer is a ceramic coating layer.
19., it is characterized in that above-mentioned coating layer is the polyflon layer as claim 14 or 15 described valve seat for engine.
20. motor cylinder head as claimed in claim 16 is characterized in that, above-mentioned coating layer is the polyflon layer.
21. motor cylinder head as claimed in claim 16 is characterized in that above-mentioned cylinder head is made by aluminum alloy, above-mentioned coating layer is the pellumina processing layer.
Claims (21)
1. a valve seat for engine is characterized in that, forms coating on the surface of being located at the valve seat body on the assembling carrier, and described assembling carrier is arranged on the intakeport or relief opening of cylinder head.
2. a valve seat for engine is characterized in that, be located at the valve seat body of assembling on the carrier, be provided with coating with above-mentioned assembling carrier surface in opposite directions at least, described assembling carrier is arranged on the intakeport or relief opening of cylinder head.
3. valve seat for engine as claimed in claim 1 or 2 is characterized in that, the standard electrode potential of above-mentioned coating is arranged between the electrode potential of the electrode potential of above-mentioned valve seat body and above-mentioned assembling carrier.
4. motor cylinder head is located at the intakeport of cylinder head or the assembling carrier on the relief opening is provided with valve seat, it is characterized in that, is formed with coating on the surface of above-mentioned assembling carrier.
5. motor cylinder head is located at the intakeport of cylinder head or the assembling carrier on the relief opening is provided with valve seat, it is characterized in that, above-mentioned assembling carrier with above-mentioned valve seat surface in opposite directions on be formed with coating.
6. as claim 4 or 5 described motor cylinder head, it is characterized in that the standard electrode potential of above-mentioned coating is arranged between the electrode potential of the electrode potential of above-mentioned valve seat and above-mentioned assembling carrier.
7. motor cylinder head is located at the intakeport of cylinder head or the assembling carrier on the relief opening is provided with valve seat, it is characterized in that, is formed with coating respectively on the surface of the surface of above-mentioned assembling carrier and above-mentioned valve seat.
8. motor cylinder head, be located at the intakeport of cylinder head or the assembling carrier on the relief opening is provided with valve seat, it is characterized in that, above-mentioned assembling carrier with above-mentioned valve seat surface in opposite directions on be formed with coating, and above-mentioned valve seat with above-mentioned assembling carrier surface in opposite directions on be formed with coating.
9. as claim 7 or 8 described motor cylinder head, it is characterized in that, the material of the coating of above-mentioned assembling carrier is made as with the material of the coating of above-mentioned valve seat: electrode potential is identical or much at one, or increases according to the order of the electrode potential of the above-mentioned valve seat of the electrode potential of the coating of the electrode potential of the coating of the electrode potential of the above-mentioned cylinder head of aluminium class, above-mentioned assembling carrier, above-mentioned valve seat, iron class.
10. a valve seat for engine is characterized in that, on the surface of the valve seat body that is provided with on the assembling carrier on the intakeport of being located at cylinder head or the relief opening isolation layer is set, and above-mentioned valve seat body is made by iron class alloy, and above-mentioned isolation layer is the iron oxide film.
11. valve seat for engine, it is characterized in that, be located at the valve seat body of assembling on the carrier, be provided with isolation layer with above-mentioned assembling carrier surface in opposite directions at least, described assembling carrier is arranged on the intakeport or relief opening of cylinder head, above-mentioned valve seat body is made by iron class alloy, and above-mentioned isolation layer is the iron oxide film.
12. the manufacture method of a valve seat, described valve seat is arranged on the intakeport or the assembling carrier on the relief opening of being located at cylinder head, it is characterized in that, after forming isolation layer on the whole surface of valve seat body, this valve seat body is assembled on the above-mentioned assembling carrier, remove the above-mentioned isolation layer of the seat surface that is positioned at valve seat body, and process above-mentioned seat surface thereafter.
13. the manufacture method of valve seat as claimed in claim 12 is characterized in that, above-mentioned valve seat body is made by iron class alloy, steam treatment is carried out on its surface and forms iron oxide film as isolation layer.
14. a valve seat for engine is characterized in that, forms the coating layer that electrical insulation is used on the surface of being located at the valve seat body on the assembling carrier, described assembling carrier is arranged on the intakeport or relief opening of cylinder head.
15. valve seat for engine, it is characterized in that, be located at the valve seat body of assembling on the carrier, be provided with the coating layer that electrical insulation is used with above-mentioned assembling carrier surface in opposite directions at least, described assembling carrier is arranged on the intakeport or relief opening of cylinder head.
16. a motor cylinder head is located at the intakeport of cylinder head or the assembling carrier on the relief opening is provided with valve seat, it is characterized in that, forms the coating layer that electrical insulation is used on the surface of above-mentioned assembling carrier.
17., it is characterized in that above-mentioned coating layer is a ceramic coating layer as claim 14 or 15 described valve seat for engine.
18. motor cylinder head as claimed in claim 16 is characterized in that above-mentioned coating layer is a ceramic coating layer.
19., it is characterized in that above-mentioned coating layer is the polyflon layer as claim 14 or 15 described valve seat for engine.
20. motor cylinder head as claimed in claim 16 is characterized in that, above-mentioned coating layer is the polyflon layer.
21. motor cylinder head as claimed in claim 16 is characterized in that above-mentioned cylinder head is made by aluminum alloy, above-mentioned coating layer is the pellumina processing layer.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP341543/2003 | 2003-09-30 | ||
| JP2003341541A JP2005105965A (en) | 2003-09-30 | 2003-09-30 | Valve seat for engine and cylinder head for engine |
| JP341542/2003 | 2003-09-30 | ||
| JP341541/2003 | 2003-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1902381A true CN1902381A (en) | 2007-01-24 |
Family
ID=34536122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200480028417 Pending CN1902381A (en) | 2003-09-30 | 2004-09-30 | Valve seat for engine and cylinder head for engine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2005105965A (en) |
| CN (1) | CN1902381A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881235A (en) * | 2009-04-22 | 2010-11-10 | 通用汽车环球科技运作公司 | The cylinder head assembly and the manufacture method thereof that are used for internal-combustion engine |
| CN101922376A (en) * | 2009-06-15 | 2010-12-22 | 通用汽车环球科技运作公司 | The corrosion resistant insert that is used for cylinder head |
| CN101994596A (en) * | 2009-08-03 | 2011-03-30 | 通用汽车环球科技运作公司 | Cylinder head assembly for internal combustion engine |
| CN109483032A (en) * | 2017-09-11 | 2019-03-19 | 本田技研工业株式会社 | The joint method of weld part formation structure and metal parts |
| CN111089004A (en) * | 2018-10-24 | 2020-05-01 | 马勒国际有限公司 | Method for mounting a valve seat ring on a cylinder head of an internal combustion engine |
| CN112088062A (en) * | 2018-05-15 | 2020-12-15 | 日本活塞环株式会社 | Iron-based sintered alloy valve seat for internal combustion engine |
-
2003
- 2003-09-30 JP JP2003341541A patent/JP2005105965A/en active Pending
-
2004
- 2004-09-30 CN CN 200480028417 patent/CN1902381A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881235A (en) * | 2009-04-22 | 2010-11-10 | 通用汽车环球科技运作公司 | The cylinder head assembly and the manufacture method thereof that are used for internal-combustion engine |
| CN101922376A (en) * | 2009-06-15 | 2010-12-22 | 通用汽车环球科技运作公司 | The corrosion resistant insert that is used for cylinder head |
| US8479701B2 (en) | 2009-06-15 | 2013-07-09 | GM Global Technology Operations LLC | Corrosion resistant insert for a cylinder head |
| CN101994596A (en) * | 2009-08-03 | 2011-03-30 | 通用汽车环球科技运作公司 | Cylinder head assembly for internal combustion engine |
| CN101994596B (en) * | 2009-08-03 | 2014-06-11 | 通用汽车环球科技运作公司 | Cylinder head assembly for internal combustion engine |
| CN109483032A (en) * | 2017-09-11 | 2019-03-19 | 本田技研工业株式会社 | The joint method of weld part formation structure and metal parts |
| CN109483032B (en) * | 2017-09-11 | 2021-06-11 | 本田技研工业株式会社 | Welded part forming structure and method of joining metal members |
| CN112088062A (en) * | 2018-05-15 | 2020-12-15 | 日本活塞环株式会社 | Iron-based sintered alloy valve seat for internal combustion engine |
| US11549408B2 (en) | 2018-05-15 | 2023-01-10 | Nippon Piston Ring Co., Ltd. | Iron-based sintered alloy valve seat for internal combustion engine |
| CN112088062B (en) * | 2018-05-15 | 2023-07-25 | 日本活塞环株式会社 | Iron-base sintered alloy valve seat for internal combustion engine |
| CN111089004A (en) * | 2018-10-24 | 2020-05-01 | 马勒国际有限公司 | Method for mounting a valve seat ring on a cylinder head of an internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005105965A (en) | 2005-04-21 |
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