WO2014104662A1 - 디젤엔진 - Google Patents
디젤엔진 Download PDFInfo
- Publication number
- WO2014104662A1 WO2014104662A1 PCT/KR2013/011953 KR2013011953W WO2014104662A1 WO 2014104662 A1 WO2014104662 A1 WO 2014104662A1 KR 2013011953 W KR2013011953 W KR 2013011953W WO 2014104662 A1 WO2014104662 A1 WO 2014104662A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cylinder head
- head cover
- cover portion
- inclined portion
- diesel engine
- 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.)
- Ceased
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases
- F02F7/006—Camshaft or pushrod housings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/062—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces characterised by the geometry of the seat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F11/00—Arrangements of sealings in combustion engines
Definitions
- the present invention relates to a diesel engine, and more particularly, to a diesel engine for preventing leakage of a cylinder head of a diesel engine.
- the cylinder head of a diesel engine forms part of a combustion chamber with a piston head part.
- the cylinder head cover is mounted on the upper portion of the cylinder head to prevent foreign matter from entering the cylinder head.
- An airtight member is located between the cylinder head and the cylinder head cover to prevent leakage of lubricant and oil supplied for cooling.
- the airtight member is deformed and hardened by hot oil, making it difficult to maintain airtightness between the cylinder head and the cylinder head cover. Therefore, leakage of oil between the cylinder head and the cylinder head cover reduces the performance and durability of the product.
- the cylinder head is made of cast iron and the cylinder head cover is made of aluminum, the shear force is generated between the cylinder head and the cylinder head cover due to the difference in the coefficient of thermal expansion according to the material difference of the dissimilar material. Therefore, it is difficult to ensure the airtightness between the cylinder head and the cylinder head cover by the airtight member, which causes a problem due to leakage.
- One embodiment of the present invention provides a diesel engine that can improve the airtightness between the cylinder head and the cylinder head cover.
- a diesel engine includes a cylinder head cover having a cylinder head of a diesel engine, an inclined portion opposed to an edge of the cylinder head and away from the cylinder head toward an inner side, and facing the inclined portion and the cylinder. And an airtight member positioned between the head and the cylinder head cover to maintain the airtight between the cylinder head and the cylinder head cover.
- the cylinder head cover may further include a first cylinder head cover portion having a hollow portion and opposed to an edge of the cylinder head, wherein the inclined portion is formed, and a second cylinder head cover portion covering the hollow portion of the first cylinder head cover portion. It may further include an auxiliary hermetic member positioned between the first cylinder head cover portion and the second cylinder head cover portion to maintain the airtight between the first cylinder head cover portion and the second cylinder cover portion.
- the cylinder head cover may further include a first cylinder head cover portion having a hollow portion and opposing an edge of the cylinder head and a second cylinder head cover portion covering the hollow portion of the first cylinder head cover portion, wherein the inclined portion is the first portion.
- the first cylinder including a first inclined portion formed in the cylinder head cover portion and a second inclined portion formed in the upper cover portion so as to face the first cylinder head cover portion and move away from the first cylinder head cover portion inwardly. It may further include an auxiliary hermetic member positioned between the head cover portion and the second cylinder head cover portion to maintain the airtightness between the first cylinder head cover portion and the second cylinder cover portion.
- one end of the inclined portion relatively adjacent to the cylinder head may be rounded.
- the inclined portion has an inclination angle with respect to the cylinder head may be in the range of 1 degree to 5 degrees and the relatively adjacent round of one end may have a radius of curvature in the range of 1.5 mm to 3 mm.
- the inclined portion has an inclination angle with respect to the cylinder head is 3 degrees and the round of the relatively adjacent one end may have a radius of curvature of 1.5mm.
- an uneven pattern may be formed on the inclined portion.
- the cylinder head may be a material including cast iron and the first cylinder head cover portion and the second cylinder head cover portion may be a material containing aluminum.
- the diesel engine can effectively improve the airtightness between the cylinder head and the cylinder head cover.
- FIG. 1 is an exploded perspective view showing a diesel engine according to a first embodiment of the present invention.
- FIG. 2 is a cross-sectional view illustrating a first cylinder head cover part and a cylinder head according to the first embodiment of FIG. 1.
- FIG. 3 is a cross-sectional view illustrating a first cylinder head cover part and a cylinder head according to the second embodiment of FIG. 2.
- FIG. 4 is a cross-sectional view illustrating a first cylinder head cover part and a cylinder head according to the third embodiment of FIG. 1.
- FIG. 5 is an exploded perspective view showing a diesel engine according to a second embodiment of the present invention.
- FIG. 6 is a cross-sectional view illustrating a cylinder head cover and a cylinder head according to the first embodiment of FIG. 5.
- FIG. 7 is a cross-sectional view illustrating a cylinder head cover and a cylinder head according to the second embodiment of FIG. 5.
- Embodiments of the invention specifically illustrate ideal embodiments of the invention. As a result, various modifications of the drawings are expected. Thus, the embodiment is not limited to the specific form of the illustrated region, but includes, for example, modification of the form by manufacture.
- the diesel engine 101 includes a cylinder head 100, an airtight member 300, and a cylinder head cover 200.
- the cylinder head cover 200 may include a first cylinder head cover part 210 and a second cylinder head cover part 220.
- the diesel engine 101 may further include an auxiliary hermetic member 320.
- the cylinder head cover 200 covers the cylinder head 100 and has an inclined portion 211.
- the cylinder head 100 forms a part of the combustion chamber, and a coolant passage is formed to cool the valves mounted to the cylinder head 100.
- the cylinder head 100 extends in one direction in the case of a large diesel engine having a large number of cylinders of an engine, and may be formed in a substantially rectangular shape having long and short directions.
- the airtight member 300 has one surface in contact with the cylinder head 100 and the other surface with the first cylinder head cover portion 210.
- the airtight member 300 is positioned between the cylinder head 100 and the first cylinder head cover portion 210 and maintains the airtightness between the cylinder head 100 and the first cylinder head cover portion 210.
- the material of the airtight member 300 has elasticity and includes a polymer, and a material known to those skilled in the art may be used.
- the first cylinder head cover portion 210 has a hollow portion and an inclined portion 211 is formed on one surface in contact with the airtight member 300.
- the inclined portion 211 is inclined in a direction away from the cylinder head 100 toward the inner side.
- diesel engine 101 of the first embodiment of the present invention may further include a cylinder head fastening member 250.
- the cylinder head fastening member 250 may couple the cylinder head 100, the airtight member 300, and the first cylinder head cover part 210.
- auxiliary hermetic member 320 is in contact with the other surface of the first cylinder head cover part 210, and the other side is in contact with the second cylinder head cover part 220.
- the auxiliary hermetic member 320 maintains hermeticity between the first cylinder head cover portion 210 and the second cylinder head cover portion 220.
- the second cylinder head cover part 220 is formed so that one surface is open and the other surface can cover the hollow part of the first cylinder head cover part 210.
- diesel engine 101 of the first embodiment of the present invention may further include a second cylinder head cover part fastening member 260.
- the second cylinder head cover part fastening member 260 may combine the first cylinder head cover part and the second cylinder head cover part 220.
- the cylinder head fastening member 250 and the second cylinder head cover part fastening member 260 are not limited to the bolt shown in FIG. 1, and may include various types of fastening members known to those skilled in the art.
- the inclined portion 211 formed on one surface of the first cylinder head cover portion 210 according to the first embodiment is further away from the cylinder head 100 toward the inside.
- the inclined portion 211 has an inclination angle ⁇ with respect to the cylinder head 100 facing the inclined portion 211.
- the cylinder head 100 may be formed of a material including cast iron, and the first cylinder head cover part 210 and the second cylinder head cover part 220 may be formed of a material containing aluminum.
- the cylinder head cover part 200 includes a first cylinder head cover part 210 and a second cylinder head cover part 220.
- the operator may easily assemble various parts such as a valve driving system and a fuel injection system, which are not shown, installed on the cylinder head 100 by the first cylinder head cover part 210 including the hollow part. That is, the side surface of the cylinder head 100 may be covered by the first cylinder head cover part 210 and the hollow part of the first cylinder head cover part 210 may be covered by the second cylinder head cover part 220. .
- the inclined portion 211 formed in the first cylinder head cover portion 210 may have the inclined portion 211 and the airtight member 300 when the airtight member 300 moves out of the first cylinder head cover portion 210 by thermal deformation. The contact area between the) is widened to limit the movement due to thermal deformation of the airtight member 300.
- the cylinder head 100 may be made of cast iron, and the first cylinder head cover part 210 and the second cylinder head cover part 220 may be made of aluminum.
- the material of the first cylinder head cover part 210 and the second cylinder head cover part 220 may be made of aluminum to reduce the weight of the engine and to produce a complicated shape required for the first cylinder head cover part 210.
- Aluminum has excellent thermal conductivity and can absorb heat generated from the cylinder head 100 and release it to the outside, thereby improving the cooling performance.
- the inclined portion 211 may be formed on at least one surface of the first cylinder head cover portion 210 manufactured from the material and coupled to the cylinder head 100 having a long length in one direction.
- first cylinder head cover portion 210 manufactured from the material and coupled to the cylinder head 100 having a long length in one direction.
- the shear stress caused by the difference in the coefficient of thermal expansion that can be generated when using different materials occurs between the cylinder head 100 and the first cylinder head cover portion 210 because the airtight member 300 can move in the longitudinal direction
- the inclined portion 211 is formed in the unidirectional direction of the first cylinder head cover portion 210 it can limit the movement of the airtight member 300 moving in the longitudinal direction.
- first cylinder head cover portion 210 and the cylinder head 100 according to the second embodiment of the present invention will be described with reference to FIG. 3.
- the first cylinder head cover part 210 faces the cylinder head 100.
- the first cylinder head cover part 210 is formed with an inclined portion 211 that is farther from the cylinder head 100 toward the inside.
- one end of the inclined portion 211 relatively adjacent to the cylinder head 100 may be round 212.
- the experiment of Table 1 is a result of the oil leakage reproduction experiment between the cylinder head cover portion 200 made of a material containing aluminum and the cylinder head 100 made of a material containing cast iron.
- the experimental conditions of the test results consisted of a three-hour test cycle in which the temperature of the engine is operated within 40 degrees Celsius (° C) to 150 degrees Celsius, and when the total 20 cycles of experiments are completed, the operating conditions of the actual vehicle 60,000km are similar.
- the leakage performance of the engine head seal is verified.
- the average surface roughness Ra of the surface on which the inclination angle ⁇ of the first cylinder head cover part 210 is formed is 0.8 ⁇ m and has a constant value regardless of the change of the inclination angle ⁇ .
- the first cylinder head cover portion 210 has an inclination angle ⁇ of 1 to 5 degrees, and the round 212 radius of curvature is manufactured within the range of 1.5 mm to 3 mm, leakage of oil may be reduced and airtightness may be improved.
- the first cylinder head cover portion 210 of the second embodiment of the present invention has one rounded portion 212 relatively adjacent to the cylinder head 100 among the inclined portions 211, so that the inclined portion 211 is provided. ) Can be prevented from being damaged due to the stamping of the airtight member 300, which may occur when a portion close to the cylinder head 100 has a sharp acute angle.
- first cylinder head cover portion 210 and the cylinder head 100 according to the third embodiment of the present invention will be described with reference to FIG. 4.
- the first cylinder head cover part 210 faces the cylinder head 100.
- the first cylinder head cover part 210 is formed with an inclined portion 211 that is farther from the cylinder head 100 toward the inside.
- an uneven pattern 213 may be formed on the inclined portion 211.
- the inclination angle ⁇ of the inclined portion 211 is formed to be the same as the inclination angle ⁇ formed in the first cylinder head cover portion 210 of the second embodiment.
- the uneven pattern 213 is not limited to the tooth shape illustrated in FIG. 4, and may include various patterns formed on the inclined portion 211 through processing such as knurling.
- the first cylinder head cover portion 210 and the cylinder head 100 of the third embodiment of the present invention are formed on the inclined portion 211 of the first cylinder head cover portion 210 with the uneven pattern 213.
- the uneven pattern 213 may increase the surface roughness of the inclined portion 211 to increase the friction force between the inclined portion 211 and the airtight member 300 to limit the movement of the airtight member 300. . Therefore, a problem of oil leakage between the cylinder head 100 and the first cylinder head cover part 210 may be solved.
- the uneven pattern 213 may be formed on one surface of the cylinder head 100 in contact with the airtight member 300 in some cases.
- the same inclined portion as the inclined portion 211 formed in the first cylinder head cover portion 210 may be formed in the second cylinder head cover portion 220. have.
- the inclined portion 211 may include a first inclined portion 217 formed in the first cylinder head cover portion 210 and a second inclined portion 215 formed in the second cylinder head cover portion 220. .
- the second inclined portion 215 may be formed in the second cylinder cover portion 220 to face the first cylinder head cover portion 210 and to move away from the first cylinder head cover portion 210 toward the inner side. have.
- first inclined portion 217 and the second inclined portion 215 may have the same round 222 and the uneven pattern 223 that the inclined portion 211 has.
- the diesel engine 102 includes a cylinder head 100, a cylinder head cover 200, and an airtight member 300.
- the cylinder head cover 200 covers the cylinder head 100. That is, the cylinder head cover 220 covers the cylinder head 100 having a substantially rectangular shape.
- the cylinder head cover 200 may face the edge of the cylinder head 100, and may have an inclined portion 211 farther from the cylinder head 100 toward the inner side.
- the airtight member 300 may be disposed between the cylinder head cover 200 and the cylinder head 100 to maintain the airtightness between the cylinder head cover 200 and the cylinder head 100.
- the diesel engine 102 according to the second embodiment may further include a second cylinder cover part fastening member 260.
- the second cylinder cover part fastening member 260 couples the cylinder head cover 200 and the cylinder head 100 to each other.
- the inclined portion 211 and the round 212 may be formed in the cylinder head cover 200.
- the inclination angle ⁇ of the inclined portion 211 and the radius of curvature of the round 212 may be equal to the inclination angle ⁇ of the inclined portion 211 of the diesel engine 101 and the radius of curvature of the round 212 according to the first embodiment. The same can be formed.
- an uneven pattern 213 may be formed on the inclined portion 211 formed in the cylinder head cover 200.
- the uneven pattern 213 may be formed in the same manner as the uneven pattern 213 of the diesel engine 101 according to the first embodiment.
- the diesel engine 102 according to the second embodiment of the present invention can effectively improve the airtightness between the cylinder head 100 and the cylinder head cover 200.
- first cylinder head cover portion 211 inclined portion
- second cylinder head cover portion 320 auxiliary airtight member
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
Claims (8)
- 디젤엔진의 실린더 헤드;상기 실린더 헤드의 가장자리와 대항하며, 내측으로 갈수록 상기 실린더 헤드와 멀어지는 경사부를 갖는 실린더 헤드 커버; 및상기 경사부와 대향하고 상기 실린더 헤드와 상기 실린더 헤드 커버 사이에 위치하며 상기 실린더 헤드와 상기 실린더 헤드 커버 사이의 기밀을 유지하는 기밀부재를 포함하는 디젤엔진.
- 제1항에서상기 실린더 헤드 커버는 중공부를 가지고 상기 실린더 헤드의 가장자리와 대항하며 상기 경사부가 형성된 제1 실린더 헤드 커버부와 상기 제1 실린더 헤드 커버부의 중공부를 커버하는 제2 실린더 헤드 커버부를 포함하며,상기 제1 실린더 헤드 커버부와 상기 제2 실린더 헤드 커버부 사이에 위치하며 상기 제1 실린더 헤드 커버부와 상기 제2 실린더 커버부 사이의 기밀을 유지하는 보조 기밀부재 더 포함하는 디젤엔진.
- 제1항에서상기 실린더 헤드 커버는,중공부를 가지고 상기 실린더 헤드의 가장자리와 대항하는 제1 실린더 헤드 커버부와 상기 제1 실린더 헤드 커버부의 중공부를 커버하는 제2 실린더 헤드 커버부를 포함하며,상기 경사부는 상기 제1 실린더 헤드 커버부에 형성된 제1 경사부와 상기 제1 실린더 헤드 커버부와 대항하며 내측으로 갈수록 상기 제1 실린더 헤드 커버부와 멀어지도록 상기 제2 실린더 헤드 커버부에 형성된 제2 경사부를 포함하고,상기 제1 실린더 헤드 커버부와 상기 제2 실린더 헤드 커버부 사이에 위치하며 상기 제1 실린더 헤드 커버부와 상기 제2 실린더 커버부 사이의 기밀을 유지하는 보조 기밀부재 더 포함하는 디젤엔진.
- 제1항에서,상기 경사부 중 상기 실린더 헤드와 상대적으로 인접한 일단부가 라운드진 것을 특징으로 하는 디젤엔진.
- 제4항에서,상기 경사부가 갖고 상기 실린더 헤드에 대한 경사각은 1도 내지 5도의 범위 내에 속하고,상기 상대적으로 인접한 일단부의 라운드는 1.5mm 내지 3mm 범위 내에 속하는 곡률 반경을 갖는 것을 특징으로 하는 디젤엔진.
- 제4항에서,상기 경사부가 갖고 상기 실린더 헤드에 대한 경사각은 3도 이고,상기 상대적으로 인접한 일단부의 라운드는 1.5mm의 곡률 반경을 갖는 것을 특징으로 하는 디젤엔진.
- 제1항에서,상기 경사부에는 요철패턴이 형성된 것을 특징으로 하는 디젤엔진.
- 제2항 또는 제3항에서,상기 실린더 헤드는 주철을 포함한 소재이고,상기 제1 실린더 헤드 커버부와 상기 제2 실린더 헤드 커버부는 알루미늄을 포함한 소재인 것을 특징으로 하는 디젤엔진.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201390001014.4U CN204804976U (zh) | 2012-12-24 | 2013-12-20 | 柴油发动机 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2012-0151952 | 2012-12-24 | ||
| KR1020120151952A KR20140083117A (ko) | 2012-12-24 | 2012-12-24 | 디젤엔진 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014104662A1 true WO2014104662A1 (ko) | 2014-07-03 |
Family
ID=51021643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2013/011953 Ceased WO2014104662A1 (ko) | 2012-12-24 | 2013-12-20 | 디젤엔진 |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR20140083117A (ko) |
| CN (1) | CN204804976U (ko) |
| WO (1) | WO2014104662A1 (ko) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07243349A (ja) * | 1994-03-01 | 1995-09-19 | Toyota Motor Corp | シリンダヘッドカバーとシリンダヘッドとのシール構造 |
| JP2744781B2 (ja) * | 1986-09-25 | 1998-04-28 | ヤマハ発動機株式会社 | エンジンのヘッドカバーの締め付け装置 |
| KR20100023592A (ko) * | 2008-08-22 | 2010-03-04 | 주식회사 밀테크 | 실린더에서 헤드와 커버 결합시 기밀성을 유지하기 위한 구조 |
| JP2010091025A (ja) * | 2008-10-09 | 2010-04-22 | Nippon Gasket Co Ltd | シリンダヘッドガスケット |
| JP2010112278A (ja) * | 2008-11-07 | 2010-05-20 | Mahle Filter Systems Japan Corp | シリンダヘッドカバーのガスケット取付構造 |
-
2012
- 2012-12-24 KR KR1020120151952A patent/KR20140083117A/ko not_active Withdrawn
-
2013
- 2013-12-20 CN CN201390001014.4U patent/CN204804976U/zh not_active Expired - Fee Related
- 2013-12-20 WO PCT/KR2013/011953 patent/WO2014104662A1/ko not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2744781B2 (ja) * | 1986-09-25 | 1998-04-28 | ヤマハ発動機株式会社 | エンジンのヘッドカバーの締め付け装置 |
| JPH07243349A (ja) * | 1994-03-01 | 1995-09-19 | Toyota Motor Corp | シリンダヘッドカバーとシリンダヘッドとのシール構造 |
| KR20100023592A (ko) * | 2008-08-22 | 2010-03-04 | 주식회사 밀테크 | 실린더에서 헤드와 커버 결합시 기밀성을 유지하기 위한 구조 |
| JP2010091025A (ja) * | 2008-10-09 | 2010-04-22 | Nippon Gasket Co Ltd | シリンダヘッドガスケット |
| JP2010112278A (ja) * | 2008-11-07 | 2010-05-20 | Mahle Filter Systems Japan Corp | シリンダヘッドカバーのガスケット取付構造 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20140083117A (ko) | 2014-07-04 |
| CN204804976U (zh) | 2015-11-25 |
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