WO2012137873A1 - シリンダジャケット - Google Patents
シリンダジャケット Download PDFInfo
- Publication number
- WO2012137873A1 WO2012137873A1 PCT/JP2012/059383 JP2012059383W WO2012137873A1 WO 2012137873 A1 WO2012137873 A1 WO 2012137873A1 JP 2012059383 W JP2012059383 W JP 2012059383W WO 2012137873 A1 WO2012137873 A1 WO 2012137873A1
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- WIPO (PCT)
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- plate
- cylinder
- cylinder jacket
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- rectangular shape
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Classifications
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- 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
- F02F1/18—Other cylinders
- F02F1/22—Other cylinders characterised by having ports in cylinder wall for scavenging or charging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
- F02B25/02—Engines characterised by using fresh charge for scavenging cylinders using unidirectional scavenging
- F02B25/04—Engines having ports both in cylinder head and in cylinder wall near bottom of piston stroke
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- 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
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- 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
- F02F1/004—Cylinder liners
Definitions
- the present invention relates to a cylinder jacket constituting a uniflow two-cycle engine for marine use.
- a partition plate (partition wall) 6a is provided with a communication hole (communication passage) 6b. Is known.
- the center of the conventional communication hole 61 having a circular shape in front view (back view) is in the height (vertical) direction and width (horizontal) direction of the cylinder jacket 62. It was formed at the center of the partition plate 63 that partitions (divides) adjacent cylinders (cylinders) so as to be located at the center C.
- the exhaust side plate 23 that forms the cylinder jacket 62 has two adjacent partition plates 63 (or front plates (not shown) and a partition plate 63 adjacent to the front plates or rear plates (not shown)). ), The partition plate 63 adjacent to the rear plate), the space formed by the exhaust side plate 23 and the fuel pump side plate 24, and the scavenging trunk 14 are communicated with each other in the right side view.
- a plurality (seven cylinders) of (first) communication holes (communication paths) 34 having a rectangular shape are formed along the longitudinal direction of the cylinder jacket 62 (direction perpendicular to the paper surface in FIG. 6), one for each cylinder. Seven cases are provided).
- the fuel pump side plate 24 forming the cylinder jacket 62 has two adjacent partition plates 63 (or front plate and partition plate 63 adjacent to the front plate, or rear plate and partition adjacent to the rear plate. Plate 63), the exhaust side plate 23, and the fuel pump side plate 24, and the (first) opening 35 having a circular shape when viewed from the left side is used for each cylinder. A plurality (seven in the case of seven cylinders) are provided one by one along the longitudinal direction of the cylinder jacket 62.
- Each of the openings 35 includes a stud bolt (not shown) erected on the outer surface (front surface) of the fuel pump side plate 24, and a female screw portion screwed with a male screw portion provided on the outer peripheral surface of the stud bolt. It is closed by a (check) lid 36 attached to the outer surface of the fuel pump side plate 24 via a nut (not shown).
- the communication hole 34 has an inner diameter in the height direction (vertical direction in FIG. 6) larger than the inner diameter of the opening 35 (about 3 to 5 times).
- the inner diameter of the communication hole 34 in the width direction (vertical direction in FIG. 7) is formed to be larger than the inner diameter of the opening 35 (about 1 to 2 times). That is, the exhaust side plate 23 is formed with a hole having an opening area (flow channel area) larger than the opening 35. Therefore, the rigidity (tensile strength) of the exhaust side plate 23 is lower (remarkably: significantly) than the rigidity (tensile strength) of the fuel pump side plate 24, and the cylinder jacket 62 due to the pressure in the cylinder (in-cylinder pressure).
- the plate thickness (wall thickness) of the exhaust side plate 23 is made thicker (larger) than the plate thickness (wall thickness) of the fuel pump side plate 24, and the pressure in the cylinder (cylinder pressure) is used.
- the deformation of the cylinder jacket 62 was made small.
- increasing the thickness of the exhaust side plate 23 increases the overall weight of the cylinder jacket 62 and the overall weight of the two-stroke engine, which is not preferable.
- the present invention has been made in view of the above circumstances, and provides a cylinder jacket that can reduce the deformation of the upper plate due to the pressure in the cylinder (in-cylinder pressure) and can reduce the weight. Objective.
- the present invention employs the following means in order to solve the above problems.
- the cylinder jacket according to the first aspect of the present invention constitutes a uniflow two-cycle engine, and has an upper plate having a rectangular shape in a top view, a lower plate having a rectangular shape in a bottom view, and a rectangular shape in a front view.
- a communication hole formed between the side plate and the fuel pump side plate and communicating between adjacent spaces is an extension amount of the exhaust side plate due to pressure in the cylinder, and the fuel pump side plate due to pressure in the cylinder. With the amount of elongation But smallest position, the front view shape, the size, is formed in the partition plate.
- the difference between the extension amount of the exhaust side plate due to the pressure in the cylinder (in-cylinder pressure) and the extension amount of the fuel pump side plate due to the pressure in the cylinder is minimized.
- the deformation of the cylinder jacket (for example, the inclination of the upper plate 21 indicated by a broken line in FIG. 2) is minimized.
- transformation of the upper board by the pressure (cylinder pressure) in a cylinder can be reduced, and a weight can be reduced.
- the communication hole has a circular shape when viewed from the front, and is closer to the fuel pump side side plate than the center in the height direction and the width direction of the cylinder jacket. And it may be formed so that the center is located on the lower plate side.
- the communication hole 37 has a center C in the height (vertical) direction and the width (lateral) direction of the cylinder jacket 4 (see FIG. 2). ) And on the fuel pump side (fuel pump side plate 24 side) and below (lower plate 22 side: far from the cover bolt hole 45). .
- transformation of the upper board by the pressure (cylinder pressure) in a cylinder can be reduced, and a weight can be reduced.
- the communication hole has a triangular shape in a front view, and the center is positioned at the center in the height direction and the width direction of the cylinder jacket. It may be formed.
- the communication hole 51 is at the center C (see FIG. 2) in the height (vertical) direction and the width (lateral) direction of the cylinder jacket 52. It is formed so that its center (midpoint) is located. Thereby, the deformation
- the uniflow-type two-cycle engine according to the second aspect of the present invention includes any one of the above-described cylinder jackets.
- the uniflow-type two-cycle engine according to the second aspect includes the cylinder jacket that can reduce the deformation of the upper plate due to the pressure in the cylinder (in-cylinder pressure). Thereby, it is possible to prevent the piston ring from hitting the inner peripheral surface of the cylinder liner and the outer peripheral surface of the piston from directly contacting the inner peripheral surface of the cylinder liner. Reliability can be improved.
- the deformation of the upper plate due to the pressure in the cylinder can be reduced, and the weight can be reduced.
- FIG. 1 It is sectional drawing which shows the structural example of the large sized diesel engine which comprised the cylinder jacket which concerns on one Embodiment of this invention, Comprising: It is the figure seen from the front side. It is sectional drawing which expands and shows the cylinder jacket, cylinder liner, cylinder cover, piston, and piston rod which are shown in FIG. 1, Comprising: It is the figure seen from the back side. It is the perspective view which looked at a part of cylinder jacket concerning one embodiment of the present invention from the exhaust side. It is the schematic which looked at the cylinder jacket shown in FIG. 3 from the back side. It is the schematic which looked at the cylinder jacket which concerns on other embodiment of this invention from the back side, Comprising: It is a figure similar to FIG.
- FIG. 1 is a cross-sectional view showing a structural example of a large diesel engine equipped with a cylinder jacket according to the present embodiment, viewed from the front side
- FIG. 2 is a cylinder jacket, a cylinder liner, a cylinder cover shown in FIG. It is sectional drawing which expands and shows a piston and a piston stick
- FIG. 4 is a perspective view as viewed from the left side in FIG. 1 (right side in FIG. 2), and FIG. 4 is a view as viewed from the back side of the cylinder jacket shown in FIG.
- a large diesel engine 1 shown in FIG. 1 is a uniflow type two-cycle engine typically used as a main engine for marine propulsion, and includes a base plate 2 positioned below and a frame ( A main body) 3 and a cylinder jacket 4 provided on the frame 3.
- the base plate 2, the frame 3, and the cylinder jacket 4 are integrally tightened and fixed by a plurality of tie bolts 5 extending in the vertical direction.
- the cylinder jacket 4 is provided with a cylinder liner 6, and a cylinder cover 7 is provided at the upper end of the cylinder liner 6.
- a piston 8 is provided in a space formed by the cylinder liner 6 and the cylinder cover 7 so as to reciprocate. Moreover, the upper end of the piston rod 9 is rotatably attached to the lower end of the piston 8.
- the base plate 2 is a crankcase, and a crankshaft 10 is provided. Moreover, the lower end of the connecting rod 11 is connected to the upper end of the crankshaft 10 so that rotation is possible.
- the frame 3 is provided with a crosshead 12 that rotatably connects the piston rod 9 and the connecting rod 11. That is, the lower end of the piston rod 9 and the upper end of the connecting rod 11 are connected to the cross head 12.
- a pair of sliding plates 13 extending in the vertical direction are provided on both sides (the left side and the right side in FIG. 1) of the cross head 12 in a state of being fixed to the frame 3 side.
- symbol 14 in FIG. 1 has shown the scavenging trunk arrange
- the cylinder jacket 4 has a single upper plate (top plate) 21 that has a rectangular shape in a top view (plan view) and a rectangular shape in a bottom view (bottom view).
- a cylinder liner 6 disposed for each cylinder is inserted into the upper plate 21 (first) through-hole (a hole having a circular shape in a top view for receiving and supporting the central portion in the longitudinal direction of the cylinder liner 6) 31
- a plurality are provided along the longitudinal direction of the cylinder jacket 4 (the axial direction of the crankshaft 10: the direction perpendicular to the paper surface in FIGS. 1 and 2).
- the lower plate 22 is slidably supported by a piston rod 9 which is arranged for each cylinder and reciprocates along a vertical direction (a direction perpendicular to the longitudinal direction of the cylinder jacket 4: the vertical direction in FIGS. 1 and 2).
- a piston rod gland packing box 32 to be inserted (second) through-hole (hole having a circular shape in bottom view for receiving and supporting the piston rod gland packing box 32) 33 extends along the longitudinal direction of the cylinder jacket 4.
- a plurality (seven in the case of seven cylinders) are provided.
- the exhaust side plate 23 includes two adjacent partition plates 25 (or a front plate and a partition plate 25 adjacent to the front plate or a rear plate and a partition plate 25 adjacent to the rear plate), and an exhaust side plate 23.
- the space formed by the fuel pump side plate 24 and the scavenging trunk 14 communicate with each cylinder in a substantially rectangular shape as viewed from the right side (first) communication hole (communication).
- the fuel pump side plate 24 includes two adjacent partition plates 25 (or a front plate and a partition plate 25 adjacent to the front plate or a rear plate and a partition plate 25 adjacent to the rear plate), and an exhaust side plate. 23 and a (first) opening 35 having a circular shape when viewed from the left side used when inspecting the space formed by the fuel pump side plate 24, one for each cylinder. A plurality (seven in the case of seven cylinders) are provided along the longitudinal direction (the axial direction of the crankshaft 10: the direction perpendicular to the paper surface in FIGS. 1 and 2).
- Each of the openings 35 includes a stud bolt (not shown) erected on the outer surface (front surface) of the fuel pump side plate 24, and a female screw portion screwed with a male screw portion provided on the outer peripheral surface of the stud bolt. It is closed by a (inspection) lid 36 (see FIG. 7) attached to the outer surface of the fuel pump side plate 24 via a nut (not shown).
- Each of the partition plates 25 includes two adjacent partition plates 25 (or a front plate and a partition plate 25 adjacent to the front plate or a rear plate and a partition plate 25 adjacent to the rear plate), and an exhaust side plate 23.
- a (second) communication hole (communication path) 37 that is formed by the fuel pump side plate 24 and has a circular shape in front view (back view) communicating between adjacent spaces.
- the communication hole 37 is on the fuel pump side (the fuel pump side plate 24 side) from the center C in the height (vertical) direction and the width (lateral) direction of the cylinder jacket 4 and on the lower side (the side of the lower plate 22).
- the inside of the cylinder (in-cylinder: cylinder liner 6 and cylinder cover 7) is provided via a scavenging port (hole) 38 provided along the circumferential direction at the lower end of the cylinder liner 6. And into the space formed by the piston 8) It has become (taken by) so.
- reference numeral 41 is a cover bolt
- reference numeral 42 is a nut
- reference numeral 43 is a piston ring
- reference numeral 44 in FIGS. 3 and 4 is a tie bolt hole through which the tie bolt 5 is inserted
- reference numeral 45 is a cover. This is a cover bolt hole into which the lower end (one end) of the bolt 41 is screwed (embedded).
- the communication hole 37 is more fuel than the center C in the height (vertical) direction and width (lateral) direction of the cylinder jacket 4.
- the center is formed on the pump side (fuel pump side plate 24 side) and on the lower side (lower plate 22 side: the side far from the cover bolt hole 45).
- the cylinder jacket 4 which can reduce the deformation
- the piston ring 43 can be prevented from hitting the inner peripheral surface of the cylinder liner 6 or the outer peripheral surface of the piston 8 can be prevented from directly hitting the inner peripheral surface of the cylinder liner 6.
- the reliability of the diesel engine 1 can be improved.
- the present invention is not limited to the above-described embodiments, and various changes and modifications can be made without departing from the gist of the present invention.
- the communication hole 37 is on the fuel pump side (the fuel pump side plate 24 side) with respect to the center C in the height (vertical) direction and the width (lateral) direction of the cylinder jacket 4, and It was formed so that its center was located on the lower side (the lower plate 22 side: the side far from the cover bolt hole 45).
- the present invention is not limited to such a form.
- the front view shape is triangular, and the cylinder jacket 52 is centered in the height direction and the width direction. It is good also as the communicating hole 51 in which the center is located.
- the position, shape, and size of the communication hole minimize the difference between the extension amount of the exhaust side plate 23 due to the pressure in the cylinder and the extension amount of the fuel pump side plate 24 due to the pressure in the cylinder ( Any position, frontal view shape, and size may be used as long as they can be close to the minimum.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
Description
しかしながら、排気側側板23の板厚を厚くすると、シリンダジャケット62全体の重量、および二サイクル機関全体の重量が増加し、好ましくないといった問題点があった。
本発明の第1の態様に係るシリンダジャケットは、ユニフロー方式の二サイクル機関を構成するとともに、上面視矩形状を呈する上板と、下面視矩形状を呈する下板と、正面視矩形状を呈する前板と、背面視矩形状を呈する後板と、右側面視矩形状を呈する排気側側板と、左側面視矩形状を呈する燃料ポンプ側側板と、隣り合うシリンダ間を仕切る仕切板と、を備えたシリンダジャケットであって、隣り合う二枚の仕切板、または前記前板と、前記前板と隣り合う仕切板、もしくは前記後板と、前記後板と隣り合う仕切板と、前記排気側側板と、前記燃料ポンプ側側板とで形成された、隣り合う空間内同士を連通する連通穴が、シリンダ内の圧力による前記排気側側板の伸び量と、シリンダ内の圧力による前記燃料ポンプ側側板の伸び量との差が、最小となる位置、正面視形状、大きさで、前記仕切板に形成されている。
これにより、シリンダ内の圧力(筒内圧)による上板の変形を低減させることができて、重量を低減させることができる。
これにより、シリンダ内の圧力(筒内圧)による上板の変形を低減させることができて、重量を低減させることができる。
これにより、シリンダ内の圧力(筒内圧)による上板の変形を低減させることができて、重量を低減させることができる。
図1は本実施形態に係るシリンダジャケットを具備した大型ディーゼルエンジンの構造例を示す断面図であって、正面側から見た図、図2は図1に示すシリンダジャケット、シリンダライナ、シリンダカバー、ピストン、ピストン棒を拡大して示す断面図であって、背面側から見た図(図1において紙面奥側から見た図)、図3は本実施形態に係るシリンダジャケットの一部を排気側(図1において左側:図2において右側)から見た斜視図、図4は図3に示すシリンダジャケットを背面側から見た図(図1において紙面奥側から見た図)である。
なお、図1中の符号14は、シリンダジャケット4の排気側に隣接して配置された掃気トランクを示している。
これにより、シリンダ内の圧力(筒内圧)による上板21の変形を低減させることができて、シリンダジャケット4の重量を低減させることができる。
例えば、上述した実施形態では、連通穴37を、シリンダジャケット4の高さ(縦)方向および幅(横)方向における中心Cよりも燃料ポンプ側(燃料ポンプ側側板24の側)で、かつ、下側(下板22の側:カバーボルト穴45から遠い側)に、その中心が位置するようにして形成させた。しかし、本発明はこのような形態に限定されるものではなく、例えば、図5に示すように、正面視形状を三角形状とし、かつ、シリンダジャケット52の高さ方向および幅方向における中心に、その中心が位置するような連通穴51としてもよい。
4 シリンダジャケット
21 上板
22 下板
23 排気側側板
24 燃料ポンプ側側板
25 仕切板
37 連通穴
51 連通穴
52 シリンダジャケット
Claims (4)
- ユニフロー方式の二サイクル機関を構成するとともに、上面視矩形状を呈する上板と、下面視矩形状を呈する下板と、正面視矩形状を呈する前板と、背面視矩形状を呈する後板と、右側面視矩形状を呈する排気側側板と、左側面視矩形状を呈する燃料ポンプ側側板と、隣り合うシリンダ間を仕切る仕切板と、を備えたシリンダジャケットであって、
隣り合う二枚の仕切板、または前記前板と、前記前板と隣り合う仕切板、もしくは前記後板と、前記後板と隣り合う仕切板と、前記排気側側板と、前記燃料ポンプ側側板とで形成された、隣り合う空間内同士を連通する連通穴が、シリンダ内の圧力による前記排気側側板の伸び量と、シリンダ内の圧力による前記燃料ポンプ側側板の伸び量との差が、最小となる位置、正面視形状、大きさで、前記仕切板に形成されているシリンダジャケット。 - 前記連通穴は、その正面視形状が円形状とされるとともに、当該シリンダジャケットの高さ方向および幅方向における中心よりも前記燃料ポンプ側側板の側で、かつ、前記下板の側に、その中心が位置するようにして形成されている請求項1に記載のシリンダジャケット。
- 前記連通穴は、その正面視形状が三角形状とされ、かつ、当該シリンダジャケットの高さ方向および幅方向における中心に、その中心が位置するようにして形成されている請求項1に記載のシリンダジャケット。
- 請求項1から3のいずれか一項に記載のシリンダジャケットを具備しているユニフロー方式の二サイクル機関。
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KR1020137013000A KR101464097B1 (ko) | 2011-04-07 | 2012-04-05 | 실린더 재킷 |
CN201280004026.2A CN103249937B (zh) | 2011-04-07 | 2012-04-05 | 工作缸座 |
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JP2011-085567 | 2011-04-07 | ||
JP2011085567A JP5713769B2 (ja) | 2011-04-07 | 2011-04-07 | シリンダジャケット |
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KR (1) | KR101464097B1 (ja) |
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Cited By (1)
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EP3467287A1 (en) * | 2017-10-06 | 2019-04-10 | Caterpillar Motoren GmbH & Co. KG | Cylinder liner assembly for engine |
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JP6813989B2 (ja) * | 2016-08-23 | 2021-01-13 | 三菱重工業株式会社 | クロスヘッド式内燃機関 |
JP7465634B2 (ja) * | 2019-06-14 | 2024-04-11 | 株式会社ジャパンエンジンコーポレーション | 舶用ディーゼルエンジン |
JP7403321B2 (ja) * | 2020-01-10 | 2023-12-22 | 株式会社ジャパンエンジンコーポレーション | 架構 |
JP2021156194A (ja) * | 2020-03-26 | 2021-10-07 | 株式会社ジャパンエンジンコーポレーション | 舶用エンジンの掃気室構造 |
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JPH05306647A (ja) * | 1992-03-04 | 1993-11-19 | Mitsubishi Heavy Ind Ltd | ディーゼル機関の掃気室構造 |
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JPH06280674A (ja) * | 1993-03-26 | 1994-10-04 | Mazda Motor Corp | 2サイクル内燃機関 |
JPH06306647A (ja) * | 1993-04-21 | 1994-11-01 | Hitachi Ltd | パタ−ン形成方法と薄膜磁性素子 |
US6932570B2 (en) * | 2002-05-23 | 2005-08-23 | General Electric Company | Methods and apparatus for extending gas turbine engine airfoils useful life |
CN201575142U (zh) * | 2009-12-28 | 2010-09-08 | 北京中清能发动机技术有限公司 | 用于往复-旋转运动相互转换机构的h型机体及其设备 |
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- 2012-04-05 WO PCT/JP2012/059383 patent/WO2012137873A1/ja active Application Filing
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Patent Citations (3)
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JPH01127951U (ja) * | 1988-02-26 | 1989-08-31 | ||
JPH05306647A (ja) * | 1992-03-04 | 1993-11-19 | Mitsubishi Heavy Ind Ltd | ディーゼル機関の掃気室構造 |
JP2004003485A (ja) * | 2002-05-21 | 2004-01-08 | Man B & W Diesel As | クロスヘッド型の大型2行程内燃機関 |
Cited By (1)
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EP3467287A1 (en) * | 2017-10-06 | 2019-04-10 | Caterpillar Motoren GmbH & Co. KG | Cylinder liner assembly for engine |
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KR101464097B1 (ko) | 2014-11-21 |
KR20130083914A (ko) | 2013-07-23 |
JP2012219699A (ja) | 2012-11-12 |
CN103249937B (zh) | 2016-05-04 |
CN103249937A (zh) | 2013-08-14 |
JP5713769B2 (ja) | 2015-05-07 |
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