CN103052786B - Cooling structure for internal combustion engine and internal combustion engine - Google Patents
Cooling structure for internal combustion engine and internal combustion engine Download PDFInfo
- Publication number
- CN103052786B CN103052786B CN201180037329.XA CN201180037329A CN103052786B CN 103052786 B CN103052786 B CN 103052786B CN 201180037329 A CN201180037329 A CN 201180037329A CN 103052786 B CN103052786 B CN 103052786B
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- Prior art keywords
- cylinder liner
- cylinder head
- week groove
- outer circumferential
- combustion engine
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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
- F02F1/02—Cylinders; Cylinder heads having cooling means
- F02F1/10—Cylinders; Cylinder heads having cooling means for liquid cooling
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or 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
- F02F1/24—Cylinder heads
- F02F1/26—Cylinder heads having cooling means
- F02F1/36—Cylinder heads having cooling means for liquid cooling
- F02F1/40—Cylinder heads having cooling means for liquid cooling cylinder heads with means for directing, guiding, or distributing liquid stream
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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
- F02F11/00—Arrangements of sealings in combustion engines
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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)
Abstract
A cylinder liner (10) having a plurality of first cooling holes (15) that are formed obliquely upward from the outer peripheral surface toward the inside of the wall, the cylinder liner having a first circumferential groove (16) in the center of the upper end surface in the thickness direction of the plate, the first cooling holes (15) having outlets that are oval, oblong, or circular in plan view, in the bottom surface where the first circumferential groove (16) is formed.
Description
Technical field
The present invention relates to a kind of cooling construction and the internal-combustion engine that are applicable to the internal-combustion engines such as marine diesel engine.
Background technique
As the cylinder liner being applicable to the internal-combustion engines such as marine diesel engine, there will be a known so a kind of cylinder liner: (in arm) has Cooling Holes (hereinafter referred to as " Cooling Holes ") (for example, referring to the patent documentation 1) relative to the planar tilt vertical with cylinder axis therein.
Patent documentation 1: Japanese Patent Laid-Open 5-214933 publication
Invent problem to be solved
But in the cylinder liner disclosed in above-mentioned patent documentation 1, as shown in FIG. 11 and 12, being maximum in inner peripheral surface compressive stress, is maximum in outer circumferential face tensile stress.In addition, in the cylinder liner disclosed in above-mentioned patent documentation 1, be positioned at outlet (cross section, Japanese: the wooden mouth) peripheral portion of Cooling Holes (boring, machining boreholes) of the topmost part outer circumferential face, thermal stress becomes large.Therefore, in the cylinder liner disclosed in above-mentioned patent documentation 1, be difficult to reduce wall thickness and obtain lightweight.
Summary of the invention
The present invention makes in view of the above problems, its object is to provide a kind of and can reduce wall thickness and obtain cooling construction and the internal-combustion engine of light-weighted internal-combustion engine.
For solving the means of problem
For achieving the above object, the present invention adopts following technological scheme.
The cooling construction of the internal-combustion engine of the first form of the present invention, have: cylinder liner, this cylinder liner has many first Cooling Holes also offered obliquely upward in wall from the outer circumferential face of this cylinder liner, the upper-end surface of this cylinder liner, the central part in thickness of slab direction has first week groove, the outlet of described first Cooling Holes is set as, forming the bottom surface of described first week groove, the plan view shape ovalize of this outlet or long-round-shape or circle, and cylinder head, this cylinder head has many second Cooling Holes also offered obliquely upward in wall from the lower end surface of this cylinder head, in described lower end surface, the peripheral part in thickness of slab direction has second week groove, and this cylinder head is configured on described cylinder liner, the opening of the top being positioned at described cylinder liner is sealed, the entrance of described second Cooling Holes be located at form described second week groove wall or bottom surface on, in described cylinder head, the described lower end surface of the inner circumferential side of described first week groove and described second week groove is positioned at when covering on described cylinder liner, the inner peripheral portion in thickness of slab direction has the 3rd week groove, and be provided with by between the upper-end surface of described cylinder liner and the lower end surface of described cylinder head and the combustion gas flowed in described 3rd week groove import to the exhaust passage of the opening on the outer circumferential face being located at described cylinder head.
Adopt the cooling construction of the internal-combustion engine of this structure, the necessary relief valve discharging gas pressure when abnormal combustion of conventional art can not be needed, the simplification of cylinder head surrounding structure can be realized.
In the cooling construction of the internal-combustion engine of said structure, more preferably, described exhaust passage is arranged by the vicinity of described second week groove.
Adopt the cooling construction of this internal-combustion engine, cooled by the cooling medium passed through in second week groove by the combustion gas of exhaust passage.
Thus, the temperature of the combustion gas from the opening ejection being located at cylinder head outer circumferential face can be made to decline, the safety of the operating personnel (engineer of such as boats and ships, operator) carrying out operation around internal-combustion engine can be guaranteed.
In the cooling construction of the internal-combustion engine of said structure, more preferably, have be embedded in described cylinder head outer circumferential face on and between the outer circumferential face of described cylinder head, form the cylinder cap urceolus in exhaust space, described exhaust space is formed as, and guides by described exhaust passage downwards from the combustion gas of the ejection of the outer circumferential face of described cylinder head along the outer circumferential face of described cylinder head.
Adopt the cooling construction of the internal-combustion engine of this structure, by exhaust passage from be located at cylinder head outer circumferential face opening ejection combustion gas, along cylinder head outer circumferential face and guided downwards.That is, from the combustion gas that the opening of the outer circumferential face being located at cylinder head sprays, the operating personnel (engineer of such as boats and ships, operator) carrying out operation around internal-combustion engine can not be sprayed to.
Thus, the safety of the operating personnel (engineer of such as boats and ships, operator) carrying out operation around internal-combustion engine can be guaranteed further.
In the cooling construction of the internal-combustion engine of said structure, more preferably, the 4th week groove of circumferentially accommodating O shape circle is provided with at the inner circumferential side wall forming described first week groove, the upper-end surface of the described cylinder liner relative in the inner circumferential side of this 4th week groove and with forming the bottom surface of described 3rd week groove bottom, is provided with the heat insulation groove that the lower end surface along cylinder axis to described cylinder liner is recessed into.
Adopt the cooling construction of this internal-combustion engine, utilize the air layer be trapped in heat insulation groove to reduce the heat load (be converted to temperature and be approximately 10 DEG C) of the O type circle being contained in 4th week groove.
Thus, can prevent O shape from enclosing and damage because of heat, can realize the long lifetime of O shape circle, the maintenance interval that O shape can be made to enclose is elongated.
In the cooling construction of the internal-combustion engine of said structure, more preferably, in the lower end surface of described cylinder head, be provided with the 3rd protuberance embedding 4th week groove, 3rd protuberance by formed described second week groove inner peripheral surface wall, with lower end surface described in this wall continuous print and with this lower end surface continuously and the wall forming the outer circumferential face of described 3rd week groove formed, this 4th week groove is located at the upper-end surface of the described cylinder liner of the inner circumferential side being positioned at described first week groove, is provided with the 5th week groove of circumferentially accommodating O shape circle at the outer circumferential side wall forming the 3rd protuberance.
Adopt the cooling construction of this internal-combustion engine, prevent the O shape that gas leaks from the mating face of cylinder head and cylinder liner from enclosing, be configured in the cylinder head side that temperature is lower than cylinder liner, the heat load being contained in the O shape circle of the 5th week groove is less than the heat load of above-mentioned heat insulation groove.
Thus, can prevent O shape from enclosing and damage because of heat, can realize the long lifetime of O shape circle, the maintenance interval that O shape can be made to enclose is elongated.
The internal-combustion engine of the second form of the present invention, has the cooling construction of any one internal-combustion engine above-mentioned.
Adopt the internal-combustion engine of above-mentioned second form, can reduce wall thickness owing to having and realize the path of external diameter and can realize light-weighted cylinder liner, therefore, whole internal-combustion engine can realize miniaturization and lightweight.
The effect of invention
Adopt cooling construction and the internal-combustion engine of internal-combustion engine of the present invention, play such effect: wall thickness can be made to reduce and realize lightweight.
Accompanying drawing explanation
Fig. 1 is the stereogram of the cylinder liner of first embodiment of the invention.
Fig. 2 is the sectional view of the major component of the cooling construction of the internal-combustion engine representing the cylinder liner with first embodiment of the invention.
The major component of Fig. 2 is amplified the diagram represented by Fig. 3.
Fig. 4 is the plan view of a part for the upper surface of the cylinder liner representing first embodiment of the invention.
Fig. 5 is the diagram of the top Cooling Holes on the top representing the cylinder liner being located at first embodiment of the invention viewed from the inner side of cylinder liner.
Fig. 6 is the diagram of the top Cooling Holes on the top representing the cylinder liner being located at first embodiment of the invention viewed from the outside of cylinder liner.
The major component of Fig. 2 is amplified the diagram represented by Fig. 7.
Fig. 8 is the sectional view of the major component of the cooling construction of the internal-combustion engine representing the cylinder liner with first embodiment of the invention.
Fig. 9 is that IX-IX in Fig. 8 is to sectional view.
Figure 10 is the stereogram of the major component of the cylinder liner representing first embodiment of the invention.
Figure 11 is the view of the stress for illustration of the outlet acting on conventional art and Cooling Holes of the present invention.
Figure 12 is the view of the stress for illustration of the outlet acting on conventional art and Cooling Holes of the present invention.
Figure 13 is the sectional view representing the major component but constructed that the internal-combustion engine of the cylinder liner with second embodiment of the invention is cold.
The major component of Figure 13 is amplified the diagram represented by Figure 14.
Figure 15 is the plan view of a part for the upper surface of the cylinder liner representing second embodiment of the invention.
Symbol description
10 cylinder liner
15 top Cooling Holes (the first Cooling Holes)
16 (the first) all grooves
17 (four) all grooves
20 cylinder head
21 cylinder cap urceolus
24 bottom Cooling Holes (the second Cooling Holes)
25 (the second) all grooves
27 (three) all grooves
30 exhaust spaces
31 exhaust passages
44 heat insulation grooves
50 cylinder liner
51 (four) all grooves
60 cylinder head
61 (three) protuberances
62 (the second) all grooves
63 (three) all grooves
64 (five) all grooves
Embodiment
(the first mode of execution)
Below, the cylinder liner of first embodiment of the invention is described referring to figs. 1 through Figure 12.
Fig. 1 is the stereogram of the cylinder liner of present embodiment, Fig. 2 is the sectional view of the major component of the cooling construction of the internal-combustion engine representing the cylinder liner with present embodiment, the major component of Fig. 2 is amplified the view represented by Fig. 3, Fig. 4 is the plan view of a part for the upper surface of the cylinder liner representing present embodiment, Fig. 5 is the view of the top Cooling Holes on the top of the cylinder liner being located at present embodiment viewed from the inner side of cylinder liner, Fig. 6 is the view of the top Cooling Holes on the top of the cylinder liner being located at present embodiment viewed from the outside of cylinder liner, the major component of Fig. 2 is amplified the view represented by Fig. 7, Fig. 8 is the sectional view of the major component of the cooling construction of the internal-combustion engine representing the cylinder liner with present embodiment, Fig. 9 is that IX-IX in Fig. 8 is to sectional view, Figure 10 is the stereogram of the major component of the cylinder liner representing present embodiment, Figure 11 and Figure 12 is the view of the stress for illustration of the outlet acting on conventional art and Cooling Holes of the present invention respectively.
Cylinder liner of the present invention, is applicable to the internal-combustion engines such as marine diesel engine, has piston (not shown) in the internal configurations of this cylinder liner, and this piston slides along the inner peripheral surface of this cylinder liner.
Symbol 11 in Fig. 2, Fig. 3, Fig. 7 to Figure 10 be embedding (installation) on the upper periphery face of cylinder liner, between the upper periphery face of cylinder liner, form the cylinder sleeve urceolus (water cavity accessory) of lower water chamber 12 and top water cavity 13.Lower water chamber 12 and top water cavity 13 are space (water cavity) in the form of a ring when being circumferentially formed as overlooking respectively, and lower water chamber 12 is located at the below of top water cavity 13, and top water cavity 13 is located at the top of lower water chamber 12.
In addition, the cylinder liner 10 of this example has bottom Cooling Holes 14 and top Cooling Holes (the first Cooling Holes) 15.
Bottom Cooling Holes 14 be when on the upper periphery face that cylinder sleeve urceolus 11 is embedded in cylinder liner 10, the hole of straight line shape that lower water chamber 12 is communicated with top water cavity 13, and to be circumferentially provided with many (in this example, being 14).The entrance (cross section) of bottom Cooling Holes 14 is located on the outer circumferential face of the cylinder liner 10 on the downside of the top being positioned at cylinder liner 10, the outlet (cross section) of bottom Cooling Holes 14 is located on the outer circumferential face of the cylinder liner 10 on the upside of the top being positioned at cylinder liner 10, and the length-wise axis (central axis) of bottom Cooling Holes 14 is relative to the planar tilt vertical with cylinder axis.
Top Cooling Holes 15 is when on the upper periphery face that cylinder sleeve urceolus 11 is embedded in cylinder liner 10, by the hole of top water cavity 13 with (first) all grooves while overlooking (circumferentially arrange continuously groove in the form of a ring) 16 straight line shapies be communicated with on the upper surface (end face) being located at cylinder liner 10, and is circumferentially provided with many (in this example, being 14).The entrance (cross section) of top Cooling Holes 15 be located at be positioned at cylinder liner 10 top on the upside of and on the outer circumferential face of cylinder liner 10 above the outlet of bottom Cooling Holes 14, the outlet (cross section) of top Cooling Holes 15 is located on the bottom surface of all grooves 16 formed bottom all grooves 16, and the length-wise axis (central axis) of top Cooling Holes 15 is relative to the planar tilt vertical with cylinder axis.In addition, the plan view shape ovalize (or long-round-shape or circle) being formed at the outlet (cross section) of the bottom surface of all grooves 16 of top Cooling Holes 15, and this top Cooling Holes 15 is made into midway at least bending bending connection once, is on the tangent line of the center circle of all grooves 16 of the central authorities of the width direction by all grooves 16 to make the major axis of this ellipse (or oval).
As shown in Fig. 2, Fig. 3, Fig. 7, Figure 11, week groove 16 to be cross sections be (roughly) rectangle U-shaped and from the upper surface of cylinder liner 10 along cylinder axis to the groove of the lower surface (bottom surface) of cylinder liner 10 recessed (digging down), as is illustrated by figs. 11 and 12, all grooves 16 are located near stress 0 (zero) point (point that compressive stress and tensile stress do not act on), and are located at the outer circumferential side of stress 0.
In addition, from Fig. 1 to Fig. 3, shown in Fig. 7, Fig. 8, in the upper periphery face of cylinder liner 10, be provided with all grooves 17 of circumferentially accommodating O type circle (not shown).In addition, as shown in Fig. 2, Fig. 3, Fig. 7, Fig. 8, forming the inner circumferential side wall of all grooves 16, be provided with (the 4th) all grooves 18 of circumferentially accommodating O type circle (not shown).
As shown in Fig. 2, Fig. 3, Fig. 7, be configured with cylinder head 20 on cylinder liner 10, the opening be positioned at above cylinder liner 10 is sealed (by sealing).
Symbol 21 in Fig. 2, Fig. 3, Fig. 7 be embedding (installation) on the outer circumferential face of cylinder head 20, between the outer circumferential face of cylinder head 20, form the cylinder cylinder cap urceolus (water cavity accessory) of water cavity 22.Water cavity 22 is spaces in the form of a ring when being circumferentially formed as overlooking, and is located at the central part of the axis (length direction) of cylinder head 20.
Cylinder head 20 has top Cooling Holes 23 and bottom Cooling Holes (the second Cooling Holes) 24.
Top Cooling Holes 23 is the holes of the straight line shape be communicated with top (top) central part of cylinder head 20 when cylinder cylinder cap urceolus 21 is embedded on the outer circumferential face of cylinder head 20, by water cavity 22, and is circumferentially provided with multiple (in this example, being 10).The entrance (cross section) of top Cooling Holes 23 is located on the wall of the upside (top side) forming water cavity 22, and the length-wise axis (central axis) of top Cooling Holes 23 is relative to the planar tilt vertical with cylinder axis.
Bottom Cooling Holes 24 is the holes of the straight line shape be communicated with water cavity 22 when cylinder cylinder cap urceolus 21 is embedded on the outer circumferential face of cylinder head 20, by (second) all grooves 25 being located at the lower surface (bottom surface) of cylinder head 20, and is circumferentially provided with multiple (in this example, being 10).The entrance (cross section) of bottom Cooling Holes 24 is located on the bottom surface of all grooves 25 formed bottom all grooves 25, the outlet (cross section) of bottom Cooling Holes 24 is located on the wall of the downside (bottom side) forming water cavity 22, and the length-wise axis (central axis) of bottom Cooling Holes 24 is relative to the planar tilt vertical with cylinder axis.
As shown in Fig. 2, Fig. 3, Fig. 7, all grooves 25 are that cross section is U-shaped and is recessed into the groove of (digging down) from the lower surface of cylinder head 20 along cylinder axis to the upper surface (end face) of cylinder head 20, and be set as, the outside of all grooves 16 is positioned at when covering on cylinder liner 10.
In addition, all grooves 26 of circumferentially accommodating O type circle (not shown) are provided with at the outer circumferential face of cylinder head 20.In addition, in the inner circumferential side of all grooves 25, be circumferentially provided with (the 3rd) all grooves 27 that cross section is U-shaped.
By formed all grooves 25 inner circumferential side wall, with the lower surface of this wall continuous print cylinder head 20 and with this lower surface continuously and form the outer circumferential side wall of all grooves 27, form (first) protuberance 28 embedded in all grooves 16.The gap (such as 3mm) of regulation is formed between the outer circumferential side wall (forming the inner circumferential side wall of all grooves 25) of protuberance 28 and the outer circumferential side wall forming all grooves 16, the gap of regulation is formed between the lower surface (lower surface of cylinder head 20) of protuberance 28 and the bottom surface being formed bottom all grooves 16, the inner circumferential side wall of protuberance 28 and be formed with the gap (such as 0.25mm) of regulation between (forming the outer circumferential side wall of all grooves 27) and the outer circumferential side wall forming all grooves 16, and protuberance 28 is given prominence to downwards along cylinder axis.
In addition, by formed all grooves 16 outer circumferential side wall, with the upper surface of this wall continuous print cylinder liner 10 and the outer circumferential face with this upper surface continuous print cylinder liner 10, form (second) protuberance 29 embedded in all grooves 25.The gap (such as 3mm) of regulation is formed between the inner circumferential side wall (forming the outer circumferential side wall of all grooves 16) of protuberance 29 and the inner circumferential side wall forming all grooves 25, the gap of regulation is formed between the upper surface (upper surface of cylinder liner 10) of protuberance 29 and the bottom surface being formed bottom all grooves 25, be formed with the gap (such as 0.45mm) of regulation between the outer circumferential side wall (outer circumferential face of cylinder liner 10) of protuberance 29 and the outer circumferential side wall forming all grooves 25, and protuberance 29 is given prominence to upward along cylinder axis.
As shown in Figure 7, in the inner circumferential side, underpart of cylinder cylinder cap urceolus 21, be circumferentially provided with exhaust space 30, this space 30 is communicated with by exhaust passage 31 with all grooves 27.
Exhaust passage 31 is radial and (being 45 degree of intervals this example) arrange at equal intervals to outer circumferential face from the center of cylinder head 20, have: first passage 32, this first passage 32 is forming the bottom surface opening bottom all grooves 27, and extends along cylinder axis to cylinder head 20 upper surface in cylinder head 20; And second channel 33, this second channel 33, at the upper end portion opening of first passage 32, and at the outer circumferential face opening of cylinder head 20, and extends along the direction vertical with cylinder axis in cylinder head 20.
As shown in Fig. 8 to Figure 10, in the underpart of cylinder sleeve urceolus 11, be connected with (being provided with) with bolt 37 for being connected the pipe joint 35 of cooling water supplying pipe 34 (with reference to Fig. 8 and Fig. 9) by flange 36.
Pipe joint 35 is radial and (being 90 degree of intervals this example) arrange at equal intervals to outer circumferential face from the center of cylinder head 20, one end of pipe joint 35 is formed at the underpart of cylinder sleeve urceolus 11, is inserted in lower water chamber 12 by through hole 38 through on thickness of slab direction.The opening 39 being rectangle (with reference to Fig. 8) is seen in the front that one bi-side, end of pipe joint 35 are respectively equipped with lower portion water cavity 12 opening, by the cooling water that cooling water supplying pipe 34 and pipe joint 35 supply, the outer circumferential face through opening 39 along cylinder liner 10 supplies in the circumferential.
In addition, one end (top) side of pipe joint 35 is closed, and only flows out cooling water from opening 39.In addition, cooling water supplying pipe 34 and pipe joint 35, by being located at the flange 40 of an end of cooling water supplying pipe 34, the flange 41 being located at the other end of pipe joint 35 and bolt 42, nut 43 connects.
On the other hand, as shown in Fig. 2, Fig. 3, Fig. 7, be provided with heat insulation groove 44 at the upper surface of the cylinder liner 10 relative with the bottom surface formed bottom all grooves 27.Heat insulation groove 44 is that cross section is U-shaped and from the upper surface of cylinder liner 10 along cylinder axis to all grooves of the lower surface of cylinder liner 10 recessed (digging down) (the U-shaped groove that such as width is 11mm, the degree of depth is 26mm).
Adopt the cylinder liner 10 of this example, such as shown in figure 11, the outlet of the first Cooling Holes 15 is located near central part, i.e. stress 0 (zero) point (point that compressive stress and tensile stress do not act on) in thickness of slab direction, and is located at the position (region) that acted on thermal stress is less than the thermal stress at the topmost part outer circumferential face place.
In addition, the outlet of the first Cooling Holes is set as, in the bottom surface of formation first week groove, and its plan view shape ovalize or long-round-shape or circle.
Thus, can wall thickness be reduced and realize the path of external diameter, lightweight can be realized, and the stress that can relax the outlet port of (alleviating) top Cooling Holes is concentrated.
Adopt the cooling construction with the cylinder liner 10 of this example and the internal-combustion engine of cylinder head 20, the cooling water in all grooves 16 is flowed into from the outlet of top Cooling Holes 15, by between the outer circumferential side wall (forming the inner circumferential side wall of all grooves 25) of protuberance 28 and the outer circumferential side wall forming all grooves 16 form gap and flow in all grooves 25, then, flow in bottom Cooling Holes 24 from the entrance of bottom Cooling Holes 24.
Thus, the necessary cooling medium connection fittings of conventional art can not be needed to import to the entrance of bottom cooling chamber 24 with the cooling water outlet from top cooling chamber 15 flowed out, the simplification of joining portion (joint) the place structure between cylinder liner 10 and cylinder head 20 can be realized.
In addition, due to cooling medium connection fittings can not be needed, therefore the path of joining portion (joint) the place external diameter between cylinder liner 10 and cylinder head 20 can be realized, and can lightweight be realized.
In addition, adopt the cooling construction with the cylinder liner 10 of this example and the internal-combustion engine of cylinder head 20, in cylinder head 20 lower end surface being positioned at all grooves 16 and all grooves 25 inner circumferential side when covering on cylinder liner 10, the inner peripheral portion in thickness of slab direction has all grooves 27, and be provided with and import to the exhaust passage 31 of the opening (outlet of second channel 33) on the outer circumferential face being located at cylinder head 20 by by the combustion gas flowed in all grooves 27 between cylinder liner 10 upper-end surface and cylinder head 20 lower end surface, therefore, the necessary relief valve releasing row's gas pressure when abnormal combustion of conventional art can not be needed, the simplification of cylinder head 20 surrounding structure can be realized.
In addition, adopt the cooling construction with the cylinder liner 10 of this example and the internal-combustion engine of cylinder head 20, exhaust passage 31 is set as by near all grooves 25, is cooled by by the cooling medium in all grooves 25 by the combustion gas of exhaust passage 31.
Thus, the temperature of the combustion gas that the opening from the outer circumferential face being located at cylinder head 20 can be made to spray declines, and can guarantee the safety of the operating personnel (engineer of such as boats and ships, operator) carrying out operation around internal-combustion engine.
Also have, adopt the cooling construction with the cylinder liner 10 of this example and the internal-combustion engine of cylinder head 20, have be embedded in cylinder head 20 outer circumferential face on, between the outer circumferential face of cylinder head 20, form the cylinder cylinder cap urceolus 21 in exhaust space 30, exhaust space 30 is formed as, the outer circumferential face of the combustion gas sprayed from the outer circumferential face of cylinder head 20 by exhaust passage 31 along cylinder head 20 is guided downwards, is guided downwards along the outer circumferential face of cylinder head 20 from the combustion gas of opening ejection of the outer circumferential face being located at cylinder head 20 by exhaust passage 31.That is, from the combustion gas that the opening of the outer circumferential face being located at cylinder head 20 sprays, the operating personnel (engineer of such as boats and ships, operator) carrying out operation around internal-combustion engine can not be sprayed to.
Thus, the safety of the operating personnel (engineer of such as boats and ships, operator) carrying out operation around internal-combustion engine can be guaranteed further.
Also have, adopt the cooling construction with the cylinder liner 10 of this example and the internal-combustion engine of cylinder head 20, when being provided with all grooves 18 of circumferentially accommodating O type circle at the inner circumferential side wall forming all grooves 16, in the inner circumferential side of all grooves 18 and cylinder liner 20 upper surface relative with the bottom surface formed bottom all grooves 27, be provided with the heat insulation groove 44 be recessed into along cylinder axis to cylinder liner 20 lower surface, utilize the air layer be trapped in heat insulation groove 44 to reduce the heat load (convert temperature to and be approximately 10 DEG C) of the O type circle be contained in all grooves 18.
Thus, the damage caused by heat of O type circle can be prevented, the long lifetime of O type circle can be realized, the maintaining interval of O type circle can be made elongated.
Adopt the internal-combustion engine with the cooling construction of the cylinder liner 10 of this example or the internal-combustion engine of this example, wall thickness can be made to reduce and realize the path of external diameter, and have and can realize light-weighted cylinder liner, therefore can realize miniaturization and the lightweight of overall engine.
(the second mode of execution)
The cylinder liner of the second mode of execution of the present invention is described referring now to Figure 13 to Figure 15.Figure 13 is the sectional view of the major component of the cooling construction of the internal-combustion engine representing the cylinder liner with present embodiment, the major component of Figure 13 is amplified the diagram represented by Figure 14, and Figure 15 is the plan view of a part for the upper surface of the cylinder liner representing present embodiment.
In the cylinder liner 50 of present embodiment, circumferentially be provided with (the 4th) all grooves 51 to replace heat insulation groove 44, in the cylinder head 60 of present embodiment, circumferentially be provided with (the 3rd) protuberance 61 of embedding (the 4th) all grooves 51, this point is not identical with above-mentioned first mode of execution.Other structural element is identical with above-mentioned first mode of execution, therefore, omits the explanation for these structural elements herein.
In addition, identical symbol is put on for the parts identical with above-mentioned first mode of execution.
In addition, in the present embodiment, the all groove 62 corresponding with all grooves 25 illustrated in the first mode of execution, to be cross section be (roughly) rectangle and from the lower surface of cylinder head 60 along cylinder axis to the groove of the upper surface (end face) of cylinder head 60 recessed (digging down), and be set as, the inner circumferential side of all grooves 16 is positioned at when covering in cylinder liner 50.
In addition, the all groove 63 corresponding with all grooves 27 illustrated in the first mode of execution, to be cross section be (roughly) rectangle and from the lower surface of cylinder head 60 along cylinder axis to the groove of the upper surface (end face) of cylinder head 60 recessed (digging down), and be set as, the inner circumferential side of all grooves 62 is positioned at when covering in cylinder liner 50.
In addition, in the present embodiment, protuberance 28 protrudes, the gap (such as 0.25mm) of regulation is formed between the outer circumferential side wall (wall relative with the inner circumferential side wall of protuberance 29) and the outer circumferential side wall forming all grooves 16 of protuberance 28, between the lower surface (lower surface of cylinder head 60) and the bottom surface being formed bottom all grooves 16 of protuberance 28, be formed with the gap of regulation, between the inner circumferential side wall and the inner circumferential side wall forming all grooves 16 of protuberance 28, be formed with the gap (such as 3mm) of regulation.In addition, all grooves 26 of circumferentially accommodating O shape circle (not shown) are provided with at the outer circumferential face of protuberance 28.
Also have, in the present embodiment, by formed all grooves 16 inner peripheral surface wall, form the wall of the outer circumferential face of all grooves 51 continuously with the upper surface of this wall continuous print cylinder liner 50 and with this upper surface, form (the 3rd) protuberance 52 embedding all grooves 62.Protuberance 52 is given prominence to upward along cylinder axis, and between the outer circumferential side wall (wall relative with the inner circumferential side wall of protuberance 28) and the inner circumferential side wall (forming the outer circumferential side wall of all grooves 62) forming protuberance 28 of protuberance 52, be formed with the gap (such as 0.25mm) of regulation, the gap of regulation is formed between the lower surface (lower surface of cylinder head 60) and the bottom surface being formed bottom all grooves 51 of protuberance 52, the gap (such as 0.25mm) of regulation is formed between the inner circumferential side wall (wall relative with the outer circumferential side wall of protuberance 61) and the outer circumferential side wall forming protuberance 61 of protuberance 52.
Further, by formed all grooves 62 inner peripheral surface wall, form the wall of the outer circumferential face of all grooves 63 continuously with the lower surface of this wall continuous print cylinder head 60 and with this lower surface, form (the 4th) protuberance 61 embedding all grooves 51.Protuberance 61 protrudes, the gap (such as 0.25mm) of regulation is formed between the outer circumferential side wall (wall relative with the inner circumferential side wall of protuberance 29) and the outer circumferential side wall forming all grooves 16 of protuberance 61, between the lower surface (lower surface of cylinder head 60) and the bottom surface being formed bottom all grooves 16 of protuberance 61, be formed with the gap of regulation, between the inner circumferential side wall and the inner circumferential side wall forming all grooves 16 of protuberance 61, be formed with the gap (such as 3mm) of regulation.In addition, (the 5th) all grooves 64 of circumferentially accommodating O shape circle (not shown) are provided with at the outer circumferential face of protuberance 61.
Adopt the cylinder liner 50 of present embodiment, prevent the O shape that gas leaks from cylinder head 60 and the mating face of cylinder liner 50 from enclosing, be configured in cylinder head 60 side that temperature is lower than cylinder liner 50, be contained in all grooves 64 and be formed at protuberance 28 outer circumferential face all grooves 26 O shape circle heat load, the heat load brought than the heat insulation groove 44 illustrated in the first mode of execution is low.
Thus, what can prevent O shape from enclosing damages because of heat, and O shape circle can realize long lifetime, and the maintenance interval that O shape can be made to enclose is elongated.
Other action effect is identical with above-mentioned first mode of execution, so place omits the description.
In addition, the present invention is also defined in above-mentioned mode of execution, can carry out various change, distortion without departing from the spirit and scope of the present invention.
Claims (6)
1. a cooling construction for internal-combustion engine, is characterized in that, has:
Cylinder liner, this cylinder liner has many first Cooling Holes also offered obliquely upward in wall from the outer circumferential face of this cylinder liner, the upper-end surface of this cylinder liner, the central part in thickness of slab direction has first week groove, the outlet of described first Cooling Holes is set as, forming the bottom surface of described first week groove, the plan view shape ovalize of this outlet or long-round-shape or circle; And
Cylinder head, this cylinder head has many second Cooling Holes also offered obliquely upward in wall from the lower end surface of this cylinder head, described lower end surface, the peripheral part in thickness of slab direction has second week groove, and this cylinder head is configured on described cylinder liner, the opening of the top being positioned at described cylinder liner is sealed
The entrance of described second Cooling Holes be located at form described second week groove wall or bottom surface on,
Described cylinder head, the lower end surface of the inner circumferential side that is positioned at described first week groove and described second week groove when covering on described cylinder liner, the inner peripheral portion in thickness of slab direction has the 3rd week groove, and is provided with by between the upper-end surface of described cylinder liner and the lower end surface of described cylinder head and the combustion gas flowed in described 3rd week groove import to the exhaust passage of the opening on the outer circumferential face being located at described cylinder head.
2. the cooling construction of internal-combustion engine as claimed in claim 1, is characterized in that, described exhaust passage is arranged by the vicinity of described second week groove.
3. the cooling construction of internal-combustion engine as claimed in claim 1 or 2, it is characterized in that, have be embedded in described cylinder head outer circumferential face on and between the outer circumferential face of described cylinder head, form the cylinder cap urceolus in exhaust space, described exhaust space is formed as, and the outer circumferential face of the combustion gas sprayed from the outer circumferential face of described cylinder head along described cylinder head is guided downwards by described exhaust passage.
4. the cooling construction of internal-combustion engine as claimed in claim 1 or 2, it is characterized in that, the 4th week groove of circumferentially accommodating O shape circle is provided with at the inner circumferential side wall forming described first week groove, in the inner circumferential side of this 4th week groove and the upper-end surface of the described cylinder liner relative with the bottom surface of bottom forming described 3rd week groove, be provided with the heat insulation groove that the lower end surface along cylinder axis to described cylinder liner is recessed into.
5. the cooling construction of internal-combustion engine as claimed in claim 1 or 2, it is characterized in that, in the lower end surface of described cylinder head, be provided with the 3rd protuberance embedding 4th week groove, 3rd protuberance by formed described second week groove inner peripheral surface wall, with lower end surface described in this wall continuous print and with this lower end surface continuously and the wall forming the outer circumferential face of described 3rd week groove formed, this 4th week groove is located at the upper-end surface of the described cylinder liner of the inner circumferential side being positioned at described first week groove, is provided with the 5th week groove of circumferentially accommodating O shape circle at the outer circumferential side wall forming the 3rd protuberance.
6. an internal-combustion engine, is characterized in that, has the cooling construction of internal-combustion engine as claimed in claim 1 or 2.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-182565 | 2010-08-17 | ||
| JP2010182565A JP5656506B2 (en) | 2010-08-17 | 2010-08-17 | Cylinder liner |
| PCT/JP2011/068419 WO2012023502A1 (en) | 2010-08-17 | 2011-08-12 | Cylinder liner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103052786A CN103052786A (en) | 2013-04-17 |
| CN103052786B true CN103052786B (en) | 2016-04-20 |
Family
ID=45605156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180037329.XA Expired - Fee Related CN103052786B (en) | 2010-08-17 | 2011-08-12 | Cooling structure for internal combustion engine and internal combustion engine |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5656506B2 (en) |
| KR (1) | KR101458727B1 (en) |
| CN (1) | CN103052786B (en) |
| WO (1) | WO2012023502A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2703630A1 (en) * | 2012-08-31 | 2014-03-05 | Wärtsilä Schweiz AG | Cylinder liner for a stroke piston combustion engine |
| CN112483272A (en) * | 2020-12-02 | 2021-03-12 | 潍柴动力股份有限公司 | Cylinder jacket |
| DE202023102190U1 (en) | 2023-04-25 | 2023-05-04 | Innio Jenbacher Gmbh & Co Og | Cylinder liner for an internal combustion engine |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49120036A (en) * | 1973-03-26 | 1974-11-16 | ||
| JPS5576420U (en) * | 1978-11-13 | 1980-05-26 | ||
| JPS62253945A (en) * | 1986-03-31 | 1987-11-05 | Tech Res Assoc Highly Reliab Marine Propul Plant | Cylinder cooling structure of liquid-cooling internal combustion engine |
| JPS62243944A (en) * | 1986-04-14 | 1987-10-24 | Mitsubishi Heavy Ind Ltd | Cylinder liner and cylinder cover structure |
| JPH0526103A (en) * | 1991-07-18 | 1993-02-02 | Toyota Motor Corp | Cooling device of internal combustion engine |
| JPH05214933A (en) * | 1992-02-06 | 1993-08-24 | Mitsubishi Heavy Ind Ltd | Cylinder for internal combustion engine |
| JPH05306646A (en) * | 1992-04-30 | 1993-11-19 | Suzuki Motor Corp | Cylinder sleeve holding structure |
| SE501469C2 (en) * | 1993-06-30 | 1995-02-20 | Saab Automobile | Cylinder liner supporting device |
| JPH0742611A (en) * | 1993-07-27 | 1995-02-10 | Mitsubishi Heavy Ind Ltd | Cylinder liner cooling passage |
| DE4428202A1 (en) * | 1994-08-09 | 1996-02-15 | Deutsche Forsch Luft Raumfahrt | Device for generating an image |
| JPH094452A (en) * | 1995-06-19 | 1997-01-07 | Yanmar Diesel Engine Co Ltd | Engine |
| JP2005315116A (en) * | 2004-04-27 | 2005-11-10 | Toyota Motor Corp | Air vent structure for coolant flow path |
| JP2009197698A (en) * | 2008-02-22 | 2009-09-03 | Mitsubishi Heavy Ind Ltd | Cylinder liner cooling structure |
-
2010
- 2010-08-17 JP JP2010182565A patent/JP5656506B2/en not_active Expired - Fee Related
-
2011
- 2011-08-12 KR KR1020137001433A patent/KR101458727B1/en not_active Expired - Fee Related
- 2011-08-12 CN CN201180037329.XA patent/CN103052786B/en not_active Expired - Fee Related
- 2011-08-12 WO PCT/JP2011/068419 patent/WO2012023502A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012023502A1 (en) | 2012-02-23 |
| CN103052786A (en) | 2013-04-17 |
| KR20130041911A (en) | 2013-04-25 |
| JP2012041842A (en) | 2012-03-01 |
| KR101458727B1 (en) | 2014-11-05 |
| JP5656506B2 (en) | 2015-01-21 |
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Effective date of registration: 20170913 Address after: Japan's Tokyo port harbor two chome 16 No. 5 Co-patentee after: JAPAN ENGINE Corp. Patentee after: MITSUBISHI HEAVY INDUSTRIES, Ltd. Address before: Japan's Tokyo port harbor two chome 16 No. 5 Patentee before: MITSUBISHI HEAVY INDUSTRIES, Ltd. |
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Granted publication date: 20160420 |
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