CN113356957A - Valve guide pipe - Google Patents
Valve guide pipe Download PDFInfo
- Publication number
- CN113356957A CN113356957A CN202110849543.0A CN202110849543A CN113356957A CN 113356957 A CN113356957 A CN 113356957A CN 202110849543 A CN202110849543 A CN 202110849543A CN 113356957 A CN113356957 A CN 113356957A
- Authority
- CN
- China
- Prior art keywords
- valve guide
- wear
- heat
- layer
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 claims abstract description 31
- 230000000694 effects Effects 0.000 claims abstract description 14
- 239000004020 conductor Substances 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 239000000956 alloy Substances 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 8
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims description 6
- 239000011733 molybdenum Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 13
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
- B32B15/011—Layered products comprising a layer of metal all layers being exclusively metallic all layers being formed of iron alloys or steels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials
- F01L3/04—Coated valve members or valve-seats
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/302—Conductive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/554—Wear resistance
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lift Valve (AREA)
Abstract
The invention relates to the technical field of engine valves, and discloses a valve guide pipe which is used for providing a guiding effect for the reciprocating motion of a valve, wherein the valve can penetrate through the valve guide pipe, the valve guide pipe is sequentially provided with a wear-resistant layer and a heat-conducting layer from inside to outside, the wear-resistant layer is made of a wear-resistant material and is used for being in sliding fit with the valve, the heat-conducting layer is made of a heat-conducting material, the valve guide pipe can be in sliding fit with the valve through the wear-resistant layer, the wear resistance is good, meanwhile, heat brought by high-temperature gas exhausted from a combustion chamber can be exhausted through the heat-conducting layer in an accelerated mode, the temperature of the valve guide pipe is reduced, the wear between the valve and the valve guide pipe is reduced, and the service life of the valve guide pipe is prolonged.
Description
Technical Field
The invention relates to the technical field of engine valves, in particular to a valve guide pipe.
Background
The engine valve mechanism mainly comprises a valve and a valve guide pipe, wherein the valve can reciprocate to suck air into a combustion chamber of the engine or discharge waste gas combusted in the combustion chamber, and the valve guide pipe is arranged on a cylinder cover of the engine and used for providing a guide effect for the reciprocating motion of the valve. In order to protect the environment and reduce the oil consumption, a method for increasing the explosion pressure of an engine is often adopted. With the continuous increase of the explosion pressure and the exhaust temperature, the working environment of the valve guide pipe is more severe, and the requirement on the performance of the valve guide pipe is higher. On one hand, the valve reciprocates in the valve guide pipe, and the valve guide pipe is easy to wear; on the other hand, the valve guide pipe is close to the combustion chamber, and the high-temperature gas exhausted from the combustion chamber contacts with the valve guide pipe, so that the working temperature of the valve guide pipe is too high, high-temperature abrasion is easily caused, the abrasion degree of the valve guide pipe and the valve is further aggravated, and the service life of the valve guide pipe is short.
Disclosure of Invention
The invention aims to provide a valve guide pipe which has wear resistance, heat conductivity and long service life.
Therefore, the invention adopts the following technical scheme:
the utility model provides a valve guide for reciprocating motion for being spiracular provides the guide effect, the valve can wear to locate in the valve guide, the valve guide is wearing layer and heat-conducting layer from inside to outside in proper order, the wearing layer by wear-resisting material make, be used for with valve sliding fit, the heat-conducting layer is made by the heat conduction material.
Preferably, the valve guide is provided with a first end and a second end, and the valve guide is provided with a valve.
As a preferable scheme of the valve guide, the wear-resistant layer comprises at least two wear-resistant parts distributed along the axial direction of the valve guide, and the at least two wear-resistant parts are respectively made of different wear-resistant materials.
As a preferable scheme of the valve guide, the heat conduction layer comprises at least two heat conduction parts distributed along the axial direction of the valve guide, and the at least two heat conduction parts are respectively made of different heat conduction materials.
As a preferable scheme of the valve guide, the outer side surface of the wear-resistant layer and the inner side surface of the heat-conducting layer are two rough surfaces which are matched with each other.
As a preferable scheme of the valve guide, the wear-resistant material comprises a molybdenum-containing iron-based alloy.
As a preferable aspect of the valve guide, the heat conductive material includes an iron-based alloy containing copper.
As a preferable scheme of the valve guide, the thickness of the wear-resistant layer is 0.25mm-2 mm.
As a preferable scheme of the valve guide, the thickness of the heat conduction layer is 1mm-3 mm.
As a preferable mode of the valve guide, the wear-resistant layer and the heat-conducting layer are integrally formed.
The invention has the beneficial effects that:
the invention provides a valve guide pipe which is sequentially provided with a wear-resistant layer and a heat conduction layer from inside to outside, wherein the wear-resistant layer is made of a wear-resistant material and is used for being in sliding fit with a valve, the wear resistance is good, the heat conduction layer is made of a heat conduction material, and the heat conduction effect is good, so that when high-temperature gas exhausted from a combustion chamber contacts the valve guide pipe, heat can be quickly dissipated from the heat conduction layer, the problem that the valve guide pipe is abraded due to the fact that the temperature of the valve guide pipe is too high is avoided, and the service life of the valve guide pipe is prolonged.
Drawings
FIG. 1 is a schematic diagram of a valve guide according to an embodiment of the present invention;
FIG. 2 is a first cross-sectional view of a valve guide provided in accordance with an embodiment of the present invention;
FIG. 3 is a second cross-sectional view of a valve guide provided in accordance with an embodiment of the present invention;
fig. 4 is a third sectional view of a valve guide provided in an embodiment of the present invention.
In the figure:
1-a wear resistant layer; 11-a first wear part; 12-a second wear part;
2-heat conducting layer; 21-a first heat conducting portion; 22-a second heat conducting portion;
100-valve guide; 101-first end.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-4, this embodiment provides a valve guide 100, valve guide 100 is used for providing a guide effect for the reciprocating motion of the valve, the valve can wear to locate in valve guide 100, this valve guide 100 is wearing layer 1 and heat-conducting layer 2 from inside to outside in proper order, wearing layer 1 is made by wear-resistant material, wearing layer 1 is used for with valve sliding fit, the wearability is good, heat-conducting layer 2 is made by the heat-conducting material, the heat conduction effect is good, make valve guide 100 in-process of working, the heat that the high-temperature gas of combustion chamber brought can accelerate the discharge through heat-conducting layer 2, thereby reduce valve guide 100's temperature, and then reduce valve guide 100's high temperature wearing and tearing, and promote valve guide 100's life. In addition, the heat conducting layer 2 can reduce the amount of wear-resistant materials in the valve guide 100, thereby reducing the manufacturing cost of the valve guide 100.
It can be understood that, because the heat conduction layer 2 is annularly arranged on the periphery of the wear-resistant layer 1, the contact area between the heat conduction layer 2 and the wear-resistant layer 1 is large, and the heat conduction effect is good.
For convenience of description, as shown in fig. 2, two ends of the valve guide 100 are respectively defined as a first end 101 and a second end, the valve is inserted into the valve guide 100 from the first end 101 of the valve guide 100, and the first end 101 of the valve guide 100 is close to the combustion chamber.
Preferably, the wall thickness of the heat conductive layer 2 increases gradually in the direction towards the first end 101, as shown in fig. 3. Because the first end 101 of the valve guide 100 is close to the combustion chamber and is contacted with the high-temperature gas exhausted from the combustion chamber, the temperature of the first end 101 of the valve guide 100 is highest, the abrasion is the most serious, the thickness of the heat conduction layer 2 of the first end 101 of the valve guide 100 is increased, the heat conduction effect of the first end 101 of the valve guide 100 can be improved, the heat is quickly exhausted from the heat conduction layer 2, the working temperature of the valve guide 100 is reduced, the abrasion of the first end 101 of the valve guide 100 is slowed down, and therefore the service life of the valve guide 100 is prolonged.
It can be understood that the thickness of the heat conductive layer 2 may be set to gradually and uniformly increase along the direction close to the first end 101, or the heat conductive layer 2 may be divided into multiple sections, and the wall thicknesses of the multiple sections of heat conductive layer 2 are different, and may be set according to actual needs, which is not limited in this embodiment.
Preferably, the wear-resistant layer 1 includes at least two wear-resistant portions distributed along the axial direction of the valve guide 100, the at least two wear-resistant portions are made of different kinds of wear-resistant materials, the wear-resistant materials can be selected according to the wear severity of different positions of the valve guide 100, the wear-resistant material with high wear resistance is arranged at the position where the valve guide 100 is worn seriously, the wear-resistant material with low wear resistance is arranged at the position where the valve guide 100 is not worn seriously, and the manufacturing cost of the valve guide 100 can be reduced on the premise of ensuring the wear resistance and the service life of the valve guide 100.
Illustratively, as shown in fig. 4, the valve guide 100 includes two wear-resistant portions, a first wear-resistant portion 11 and a second wear-resistant portion 12, respectively, the first wear-resistant portion 11 is close to the combustion chamber, and the wear resistance of the wear-resistant material of the first wear-resistant portion is superior to that of the wear-resistant material of the second wear-resistant portion 12.
Preferably, heat-conducting layer 2 includes along valve guide 100's axial distribution's two at least heat conduction portions, two at least heat conduction portions adopt different kinds of heat conduction materials to make respectively, can select the heat conduction material according to the operating temperature of valve guide 100 different positions, set up the high heat conduction material of heat conduction in the position that operating temperature is high, set up the low heat conduction material of heat conduction in the position that operating temperature is low, can reduce valve guide 100's manufacturing cost on the prerequisite of guaranteeing heat conduction layer 2's heat conduction effect.
Illustratively, as shown in fig. 4, the heat conduction layer 2 includes two heat conduction portions, a first heat conduction portion 21 and a second heat conduction portion 22, respectively, the first heat conduction portion 21 is close to the combustion chamber, and the heat conduction material of the first heat conduction portion 21 has a heat conduction property superior to that of the second heat conduction portion 22. It is understood that the length of the first wear-resistant portion 11 and the length of the first heat conduction portion 21 may be the same, and the length of the first wear-resistant portion 11 and the length of the first heat conduction portion 21 may be different according to the requirement, which is not limited in this embodiment.
Preferably, the lateral surface of wearing layer 1 and the medial surface of heat-conducting layer 2 are two rough surfaces of mutually supporting, can increase wearing layer 1 and heat-conducting layer 2's area of contact to improve heat conduction layer 2's heat conduction effect, so that wearing layer 1's heat can be discharged by heat-conducting layer 2 fast.
Optionally, the wear-resistant material comprises a molybdenum-containing iron-based alloy, and the molybdenum-containing iron-based alloy has a low friction coefficient and good wear resistance. Further, the wear resistance of the wear-resistant material can be improved by increasing the content of molybdenum in the molybdenum-containing iron-based alloy.
Optionally, the heat conducting material includes a copper-containing iron-based alloy, which has good heat conductivity and can play a role in quickly dissipating heat, so as to prevent the working temperature of the valve guide 100 from being too high.
Of course, the type of the wear-resistant material and the type of the heat-conductive material are not limited thereto, and the wear-resistant material and the heat-conductive material can be set according to actual use requirements, and this embodiment does not limit this.
Preferably, the thickness of the wear-resistant layer 1 is 0.25mm-2mm, which can ensure the wear resistance of the valve guide 100 and improve the service life of the valve guide 100.
Preferably, the thickness of the heat conduction layer 2 is 1mm-3mm, which can ensure good heat conduction effect, so that the heat of the high-temperature gas discharged from the combustion chamber and the heat generated by the friction between the valve and the wear-resistant layer 1 can be rapidly dissipated from the heat conduction layer 2, thereby preventing the over-high working temperature of the valve guide 100 caused by heat accumulation, and further prolonging the service life of the valve guide 100.
Preferably, the wear-resistant layer 1 and the heat-conducting layer 2 are integrally formed, so that the machining processes of the valve guide 100 can be reduced, and the machining efficiency of the valve guide 100 can be improved. In addition, wearing layer 1 and heat-conducting layer 2 integrated into one piece can also guarantee the bonding strength between wearing layer 1 and the heat-conducting layer 2. Illustratively, the wear-resistant layer 1 and the heat conduction layer 2 are integrally formed by adopting a powder metallurgy process, and the powder metallurgy process has the advantages of energy conservation, material conservation, high processing precision and good stability.
Certainly, the forming manner of the wear-resistant layer 1 and the heat-conducting layer 2 is not limited to this, and in other embodiments, the wear-resistant layer 1 may be formed first, and then the wear-resistant layer 1 is used as a mandrel to form the heat-conducting layer 2, or the wear-resistant layer 1 may be formed first and then the heat-conducting layer 2 is formed, and the wear-resistant layer 1 may be set according to actual processing requirements, which is not limited in this embodiment.
In this embodiment, the valve guide 100 is disposed through the cylinder head. Specifically, the valve guide 100 is interference fit with the cylinder head.
Optionally, the outer surface of the heat conduction layer 2 is convexly provided with an annular protrusion, the side face of the annular protrusion can be abutted to the cylinder cover, on one hand, the contact area between the heat conduction layer 2 and the cylinder cover can be increased, the heat dissipation effect of the heat conduction layer 2 is further improved, on the other hand, an axial limiting effect can be provided for the valve guide 100, and the valve guide 100 is convenient to assemble.
In the description of the present specification, it is to be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or structure referred to must have a specific orientation, be configured and operated in a specific orientation, and thus, cannot be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. The utility model provides a valve guide for reciprocating motion for being spiracular provides the guide effect, the valve can wear to locate among the valve guide, its characterized in that, valve guide is wearing layer (1) and heat-conducting layer (2) from inside to outside in proper order, wearing layer (1) are made by wear-resisting material, be used for with valve sliding fit, heat-conducting layer (2) are made by the heat conduction material.
2. A valve guide according to claim 1, wherein the valve is adapted to be inserted through the valve guide from a first end (101) thereof, the thickness of the heat conducting layer (2) increasing in a direction towards the first end (101).
3. Valve guide according to claim 1, characterized in that the wear layer (1) comprises at least two wear parts distributed in the axial direction of the valve guide, at least two wear parts being made of different kinds of wear-resistant material, respectively.
4. A valve guide according to claim 1, characterized in that the heat conducting layer (2) comprises at least two heat conducting portions distributed in the axial direction of the valve guide, at least two of said heat conducting portions being made of different kinds of heat conducting materials, respectively.
5. A valve guide according to claim 1, characterized in that the outer side of the wear resistant layer (1) and the inner side of the heat conductive layer (2) are two mutually cooperating roughened surfaces.
6. A valve guide as claimed in claim 1, wherein the wear resistant material comprises a molybdenum containing iron based alloy.
7. A valve guide according to claim 1, wherein the thermally conductive material comprises a copper-containing iron-based alloy.
8. A valve guide according to claim 1, characterized in that the thickness of the wear resistant layer (1) is 0.25-2 mm.
9. A valve guide according to claim 1, characterized in that the thickness of the heat conducting layer (2) is 1-3 mm.
10. A valve guide according to any of claims 1-9, characterized in that the wear resistant layer (1) and the heat conductive layer (2) are formed in one piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110849543.0A CN113356957A (en) | 2021-07-27 | 2021-07-27 | Valve guide pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110849543.0A CN113356957A (en) | 2021-07-27 | 2021-07-27 | Valve guide pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113356957A true CN113356957A (en) | 2021-09-07 |
Family
ID=77540327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110849543.0A Pending CN113356957A (en) | 2021-07-27 | 2021-07-27 | Valve guide pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113356957A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114033523A (en) * | 2021-10-31 | 2022-02-11 | 东风商用车有限公司 | Air valve guide pipe of engine and manufacturing method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4185368A (en) * | 1976-09-02 | 1980-01-29 | K-Line Industries, Inc. | Method for making valve guide inserts |
| US4465040A (en) * | 1980-12-05 | 1984-08-14 | Mack Trucks, Inc. | Valve guide insert |
| JPH1047025A (en) * | 1996-08-06 | 1998-02-17 | Fuji Oozx Inc | Valve guide for internal combustion engine and its manufacture |
| US5819774A (en) * | 1996-08-28 | 1998-10-13 | Caterpillar Inc. | Self-lubricating and wear resistant valve/valve guide combination for internal combustion engines |
| US6119646A (en) * | 1998-07-28 | 2000-09-19 | Teledyne Technologies Incorporated | Guide for a movable member |
| US6125810A (en) * | 1998-12-10 | 2000-10-03 | Caterpillar Inc. | Ceramic valve guide with two internal diameters |
| US20040069262A1 (en) * | 2002-09-09 | 2004-04-15 | Kenji Mihara | Exhaust valve guide for engines |
| CN213743568U (en) * | 2020-10-13 | 2021-07-20 | 潍柴动力股份有限公司 | Valve guide pipe and engine with same |
-
2021
- 2021-07-27 CN CN202110849543.0A patent/CN113356957A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4185368A (en) * | 1976-09-02 | 1980-01-29 | K-Line Industries, Inc. | Method for making valve guide inserts |
| US4465040A (en) * | 1980-12-05 | 1984-08-14 | Mack Trucks, Inc. | Valve guide insert |
| JPH1047025A (en) * | 1996-08-06 | 1998-02-17 | Fuji Oozx Inc | Valve guide for internal combustion engine and its manufacture |
| US5819774A (en) * | 1996-08-28 | 1998-10-13 | Caterpillar Inc. | Self-lubricating and wear resistant valve/valve guide combination for internal combustion engines |
| US6119646A (en) * | 1998-07-28 | 2000-09-19 | Teledyne Technologies Incorporated | Guide for a movable member |
| US6125810A (en) * | 1998-12-10 | 2000-10-03 | Caterpillar Inc. | Ceramic valve guide with two internal diameters |
| US20040069262A1 (en) * | 2002-09-09 | 2004-04-15 | Kenji Mihara | Exhaust valve guide for engines |
| CN213743568U (en) * | 2020-10-13 | 2021-07-20 | 潍柴动力股份有限公司 | Valve guide pipe and engine with same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114033523A (en) * | 2021-10-31 | 2022-02-11 | 东风商用车有限公司 | Air valve guide pipe of engine and manufacturing method thereof |
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Application publication date: 20210907 |