CN103052786A

CN103052786A - Cylinder liner

Info

Publication number: CN103052786A
Application number: CN201180037329XA
Authority: CN
Inventors: 门胁刚; 国弘信幸
Original assignee: Mitsubishi Heavy Industries Ltd
Current assignee: Mitsubishi Heavy Industries Ltd; Japan Engine Corp
Priority date: 2010-08-17
Filing date: 2011-08-12
Publication date: 2013-04-17
Anticipated expiration: 2031-08-12
Also published as: JP2012041842A; KR20130041911A; CN103052786B; WO2012023502A1; KR101458727B1; JP5656506B2

Abstract

Provided is a cylinder liner reduced in weight by reducing the wall thickness thereof. A cylinder liner (10) provided with: first cooling bores (15) formed obliquely upward toward the inside of the wall of the cylinder liner from the outer peripheral surface thereof; and a first circumferential groove (16) formed in the upper end surface of the cylinder liner (10) at the center in the plate thickness direction thereof. The outlets of the first cooling bores (15) are provided in the bottom surface of the first circular groove (16) in such a manner that the shape of the outlets in a plan view is an ellipse, an oval, or a circle.

Description

Cylinder sleeve

Technical field

The present invention relates to a kind of cylinder sleeve that is applicable to the internal-combustion engines such as marine diesel engine.

Background technique

As the cylinder sleeve that is applicable to the internal-combustion engines such as marine diesel engine, known have a kind of like this cylinder sleeve: section's (in arm) has the Cooling Holes (hereinafter referred to as " Cooling Holes ") (for example, with reference to patent documentation 1) that tilts with respect to the plane vertical with cylinder axis within it.

Patent documentation 1: Japanese patent laid-open 5-214933 communique

Invent problem to be solved

But, in above-mentioned patent documentation 1 disclosed cylinder sleeve, such as Figure 11 and shown in Figure 12, be maximum in the inner peripheral surface compressive stress, be maximum in the outer circumferential face tensile stress.In addition, in above-mentioned patent documentation 1 disclosed cylinder sleeve, at outlet (cross section, Japanese: the wooden mouthful) peripheral portion of the Cooling Holes that is positioned at the topmost part outer circumferential face (boring, machining boreholes), it is large that thermal stress becomes.Therefore, in above-mentioned patent documentation 1 disclosed cylinder sleeve, be difficult to reduce wall thickness and obtain lightweight.

Summary of the invention

The present invention makes in view of the above problems, and its purpose is to provide a kind of and can reduces wall thickness and obtain light-weighted cylinder sleeve.

Be used for solving the means of problem

For achieving the above object, the present invention adopts following technological scheme.

The cylinder sleeve of the first form of the present invention, have many first Cooling Holes of in wall, also offering obliquely upward from the outer circumferential face of this cylinder sleeve, the central part upper-end surface, the thickness of slab direction at this cylinder sleeve has first all grooves, the outlet of described the first Cooling Holes is set as, in the bottom surface that forms described first all grooves, the plan view shape ovalize of this outlet or long-round-shape or circle.

Adopt the cylinder sleeve of described the first form, for example, as shown in figure 11, the central part that the outlet of the first Cooling Holes 15 is arranged on the thickness of slab direction is near stress 0 (zero) point (point that compressive stress and tensile stress do not act on), and is arranged on the thermal stress that acts on less than the position (zone) of the thermal stress at the topmost part outer circumferential face place.

In addition, the outlet of the first Cooling Holes is set as, plan view shape ovalize or long-round-shape or the circle that should export in the bottom surface that forms first all grooves.

Thus, can reduce wall thickness and realize the path of external diameter, can realize lightweight, and the stress that can relax the outlet port of (alleviating) top Cooling Holes is concentrated.

The cooling construction of the internal-combustion engine of the second form of the present invention has: above-mentioned any cylinder sleeve; And cylinder head, this cylinder head has many second Cooling Holes of also offering obliquely upward from the lower end surface of this cylinder head in wall, the peripheral part lower end surface, the thickness of slab direction at this cylinder head has the second week groove, and this cylinder head is configured on the described cylinder sleeve, the opening that will be positioned at the top of described cylinder sleeve seals, and the entrance of described the second Cooling Holes is located on the wall or bottom surface that forms described second week groove.

Adopt the cooling construction of the internal-combustion engine of described the second form, flow into cooling medium (for example cooling water) in first all grooves from the outlet of the first Cooling Holes, for example the outer circumferential side wall (forming interior all side wall surfaces of all grooves 25) by being formed at protuberance shown in Figure 3 28 and the gap that forms between the outer circumferential side wall of all grooves 16 flow in the second week groove 25, and the entrance from the second Cooling Holes 24 flows in the second Cooling Holes 24 afterwards.

Thus, do not need the necessary cooling medium connection fittings of conventional art will import to from the cooling medium that the outlet of the first Cooling Holes is flowed out the entrance of the second Cooling Holes, can realize that the joining portion (joint) between cylinder sleeve and the cylinder head locates the simplification of structure.

In addition, owing to can not need the cooling medium connection fittings, locate the path of external diameter so can realize the joining portion (joint) between cylinder sleeve and the cylinder head, and can realize lightweight.

In the cooling construction of the internal-combustion engine of described the second form, better structure is: the perimembranous described lower end surface, the thickness of slab direction that is positioned at all sides of described first all grooves and described second week groove on covering on described cylinder sleeve the time has the 3rd all grooves, and is provided with the exhaust passage that the combustion gas that flow between the lower end surface with the upper-end surface by described cylinder sleeve and described cylinder head in the described the 3rd all grooves import to the opening on the outer circumferential face that is located at described cylinder head.

Adopt the cooling construction of the internal-combustion engine of this structure, can not need the necessary relief valve that the release gas pressure is used when abnormal combustion of conventional art, can realize the simplification of cylinder head surrounding structure.

In the cooling construction of the internal-combustion engine of said structure, more preferably, described exhaust passage arranges by described second week groove neighbouringly.

Adopt the cooling construction of this internal-combustion engine, the combustion gas by the exhaust passage are by the cooling medium cooling of passing through in the second week groove.

Thus, can make from the drop in temperature of the combustion gas of the opening ejection of being located at the cylinder head outer circumferential face, can guarantee around internal-combustion engine, to carry out the operating personnel's (for example engineer of boats and ships, operator) of operation safety.

In the cooling construction of the internal-combustion engine of said structure, more preferably, have on the outer circumferential face that is embedded in described cylinder head and and the outer circumferential face of described cylinder head between form exhaust with the cylinder cap urceolus in space, described exhaust forms with the space, will be by described exhaust passage outer circumferential face from the combustion gas of the ejection of the outer circumferential face of described cylinder head along described cylinder head guide downwards.

Adopt the cooling construction of the internal-combustion engine of this structure,, guided downwards along the outer circumferential face of cylinder head from the combustion gas of the opening ejection of the outer circumferential face of being located at cylinder head by the exhaust passage.That is, the combustion gas from the opening ejection of the outer circumferential face of being located at cylinder head can not spray to the operating personnel (for example engineer of boats and ships, operator) who carries out operation around internal-combustion engine.

Thus, can further guarantee around internal-combustion engine, to carry out the operating personnel's (for example engineer of boats and ships, operator) of operation safety.

In the cooling construction of the internal-combustion engine of said structure, more preferably, be provided with along the 4th week groove of circumferentially accommodating O shape circle at the interior all side wall surfaces that form described first all grooves, in the upper-end surface of interior all sides of this 4th week groove and the described cylinder sleeve relative with the bottom surface that forms described the 3rd all groove bottoms, be provided with the groove of the recessed heat insulation usefulness in lower end surface along from cylinder axis to described cylinder sleeve.

Adopt the cooling construction of this internal-combustion engine, utilize the interior air layer of groove that is trapped in heat insulation usefulness to reduce the heat load (be converted to temperature and be approximately 10 ° of C) of the O type circle that is contained in the 4th week groove.

Thus, can prevent that O shape circle from damaging because of heat, can realize the long lifetime of O shape circle, can make the maintenance interval of O shape circle elongated.

In the cooling construction of the internal-combustion engine of said structure, more preferably, lower end surface at described cylinder head, be provided with the 3rd protuberance that embeds the 4th week groove, the 3rd protuberance by the wall of the inner peripheral surface that forms described second week groove, with the continuous described lower end surface of this wall and with this lower end surface continuously and the wall that forms the outer circumferential face of described the 3rd all grooves form, this 4th week groove is located at the upper-end surface of the described cylinder sleeve of all sides that are positioned at described first all grooves, is provided with along the 5th all grooves of circumferentially accommodating O shape circle at the outer circumferential side wall that forms the 3rd protuberance.

Adopt the cooling construction of this internal-combustion engine, prevent the O shape circle that gas leaks from the mating face of cylinder head and cylinder sleeve, be configured in the temperature cylinder head side lower than cylinder sleeve, the heat load of O shape circle that is contained in the 5th all grooves is less than the heat load of the groove of above-mentioned heat insulation usefulness.

The internal-combustion engine of the 3rd form of the present invention has the cooling construction of above-mentioned any cylinder sleeve or above-mentioned any internal-combustion engine.

Adopt the internal-combustion engine of above-mentioned the 3rd form, can reduce wall thickness and realize the path of external diameter, and can realize light-weighted cylinder sleeve that therefore, whole internal-combustion engine can realize miniaturization and lightweight owing to having.

The effect of invention

Adopt cylinder sleeve of the present invention, play such effect: wall thickness is reduced and realize lightweight.

Description of drawings

Fig. 1 is the stereogram of the cylinder sleeve of first embodiment of the invention.

Fig. 2 is the sectional view of major component of cooling construction of the internal-combustion engine of the cylinder sleeve of expression with first embodiment of the invention.

Fig. 3 is the diagram that the major component of Fig. 2 is amplified expression.

Fig. 4 is the plan view of a part of upper surface of the cylinder sleeve of expression first embodiment of the invention.

Fig. 5 is the diagram of the top Cooling Holes on the expression top of seeing the cylinder sleeve of being located at first embodiment of the invention from the inboard of cylinder sleeve.

Fig. 6 is the diagram of the top Cooling Holes on the expression top of seeing the cylinder sleeve of being located at first embodiment of the invention from the outside of cylinder sleeve.

Fig. 7 is the diagram that the major component of Fig. 2 is amplified expression.

Fig. 8 is the sectional view of major component of cooling construction of the internal-combustion engine of the cylinder sleeve of expression with first embodiment of the invention.

Fig. 9 is that IX-IX among Fig. 8 is to sectional view.

Figure 10 is the stereogram of major component of the cylinder sleeve of expression first embodiment of the invention.

Figure 11 is for the view of illustration in the stress of the outlet of conventional art and Cooling Holes of the present invention.

Figure 12 is for the view of illustration in the stress of the outlet of conventional art and Cooling Holes of the present invention.

Figure 13 is the cold but sectional view of the major component of structure of the internal-combustion engine of cylinder sleeve that expression has second embodiment of the invention.

Figure 14 is the diagram that the major component of Figure 13 is amplified expression.

Figure 15 is the plan view of a part of upper surface of the cylinder sleeve of expression second embodiment of the invention.

Symbol description

10 cylinder sleeves

15 top Cooling Holes (the first Cooling Holes)

16 (the first) all grooves

The all grooves of 17 (four)

20 cylinder heads

21 cylinder cap urceolus

24 bottom Cooling Holes (the second Cooling Holes)

25 (the second) all grooves

The all grooves of 27 (three)

The space is used in 30 exhausts

31 exhaust passages

The groove of 44 heat insulation usefulness

50 cylinder sleeves

The all grooves of 51 (four)

60 cylinder heads

61 (the 3rd) protuberance

62 (the second) all grooves

The all grooves of 63 (three)

The all grooves of 64 (five)

Embodiment

(the first mode of execution)

Below, the cylinder sleeve of first embodiment of the invention is described referring to figs. 1 through Figure 12.

Fig. 1 is the stereogram of the cylinder sleeve of present embodiment, Fig. 2 is the sectional view of major component of cooling construction of the internal-combustion engine of the cylinder sleeve of expression with present embodiment, Fig. 3 is the view that the major component of Fig. 2 is amplified expression, Fig. 4 is the plan view of a part of upper surface of the cylinder sleeve of expression present embodiment, Fig. 5 is the view of top Cooling Holes of seeing the top of the cylinder sleeve of being located at present embodiment from the inboard of cylinder sleeve, Fig. 6 is the view of top Cooling Holes of seeing the top of the cylinder sleeve of being located at present embodiment from the outside of cylinder sleeve, Fig. 7 is the view that the major component of Fig. 2 is amplified expression, Fig. 8 is the sectional view of major component of cooling construction of the internal-combustion engine of the cylinder sleeve of expression with present embodiment, Fig. 9 is that IX-IX among Fig. 8 is to sectional view, Figure 10 is the stereogram of major component of the cylinder sleeve of expression present embodiment, and Figure 11 and Figure 12 are respectively for the view of illustration in the stress of the outlet of conventional art and Cooling Holes of the present invention.

Cylinder sleeve of the present invention is applicable to the internal-combustion engines such as marine diesel engine, in the internal configurations of this cylinder sleeve piston (not shown) is arranged, and this piston slides along the inner peripheral surface of this cylinder sleeve.

Symbol 11 among Fig. 2, Fig. 3, Fig. 7 to Figure 10 are embeddings (installation) on the upper periphery face of cylinder sleeve, and the upper periphery face of cylinder sleeve between form the cylinder sleeve urceolus (water cavity accessory) of bottom water cavity 12 and top water cavity 13.Bottom water cavity 12 and top water cavity 13 are respectively that bottom water cavity 12 is located at the below of top water cavity 13 along the space (water cavity) that circumferentially forms when overlooking in the form of a ring, and top water cavity 13 is located at the top of bottom water cavity 12.

In addition, the cylinder sleeve 10 of this example has bottom Cooling Holes 14 and top Cooling Holes (the first Cooling Holes) 15.

Bottom Cooling Holes 14 is when cylinder sleeve urceolus 11 is embedded on the upper periphery face of cylinder sleeve 10, bottom water cavity 12 and top water cavity 13 is communicated with the hole of the straight line shape that gets up, and along being circumferentially with many (being 14 in this example).The entrance of bottom Cooling Holes 14 (cross section) is located on the outer circumferential face of cylinder sleeve 10 of the top downside that is positioned at cylinder sleeve 10, the outlet of bottom Cooling Holes 14 (cross section) is located on the outer circumferential face of cylinder sleeve 10 of the top upside that is positioned at cylinder sleeve 10, and the length-wise axis of bottom Cooling Holes 14 (central axis) tilts with respect to the plane vertical with cylinder axis.

Top Cooling Holes 15 be when cylinder sleeve urceolus 11 is embedded on the upper periphery face of cylinder sleeve 10, with top water cavity 13 and be located at (first) all grooves on the upper surface (end face) of cylinder sleeve 10 (along circumferentially arrange continuously overlook the time in the form of a ring groove) 16 be communicated with the hole of the straight line shape that gets up, and along being circumferentially with many (being 14 in this example).The entrance of top Cooling Holes 15 (cross section) is located on the outer circumferential face of cylinder sleeve 10 of outlet top of the top upside that is positioned at cylinder sleeve 10 and bottom Cooling Holes 14, the outlet of top Cooling Holes 15 (cross section) is located on the bottom surface of all grooves 16 that form all grooves 16 bottoms, and the length-wise axis of top Cooling Holes 15 (central axis) tilts with respect to the plane vertical with cylinder axis.In addition, the plan view shape ovalize (or long-round-shape or circle) of the outlet (cross section) of the bottom surface that is formed at all grooves 16 of top Cooling Holes 15, and this top Cooling Holes 15 is made into midway at least bending bending once and connects, so that major axis that should ellipse (or oval) is on the tangent line of center circle of all grooves 16 of central authorities of the width direction by all grooves 16.

Such as Fig. 2, Fig. 3, Fig. 7, shown in Figure 11, week, groove 16 was that the cross section is (roughly) rectangle U font and from the groove of the upper surface of cylinder sleeve 10 10 the lower surface (bottom surface) recessed (digging down) along cylinder axis to cylinder sleeve, such as Figure 11 and shown in Figure 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 0 of stress.

In addition, from Fig. 1 to Fig. 3, Fig. 7, shown in Figure 8, at the upper periphery face of cylinder sleeve 10, be provided with along all grooves 17 of circumferentially accommodating O type circle (not shown).In addition, such as Fig. 2, Fig. 3, Fig. 7, shown in Figure 8, at the interior all side wall surfaces that form all grooves 16, be provided with along (the 4th) all grooves 18 of circumferentially accommodating O type circle (not shown).

Such as Fig. 2, Fig. 3, shown in Figure 7, on cylinder sleeve 10, dispose cylinder head 20, the opening that is positioned at cylinder sleeve 10 tops is sealed (sealed).

Symbol 21 among Fig. 2, Fig. 3, Fig. 7 are embeddings (installation) on the outer circumferential face of cylinder head 20, and the outer circumferential face of cylinder head 20 between form the cylinder cylinder cap urceolus (water cavity accessory) of water cavity 22.Water cavity 22 is along the space that circumferentially forms when overlooking in the form of a ring, and is located at the central part of axial (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 holes of the straight line shape that is communicated with when cylinder cylinder cap urceolus 21 is embedded on the outer circumferential face of cylinder head 20, with top (top) central part of water cavity 22 and cylinder head 20, and along being circumferentially with a plurality of (being 10 in this example).The entrance of top Cooling Holes 23 (cross section) is located on the wall of the upside (top side) that forms water cavity 22, and the length-wise axis of top Cooling Holes 23 (central axis) tilts with respect to the plane vertical with cylinder axis.

Bottom Cooling Holes 24 is when cylinder cylinder cap urceolus 21 is embedded on the outer circumferential face of cylinder head 20, will be located at (second) all grooves 25 of lower surface (bottom surface) of cylinder head 20 and the hole that water cavity 22 is communicated with the straight line shape that gets up, and along being circumferentially with a plurality of (being 10 in this example).The entrance of bottom Cooling Holes 24 (cross section) is located on the bottom surface of all grooves 25 that form all grooves 25 bottoms, the outlet of bottom Cooling Holes 24 (cross section) is located on the wall of the downside (bottom side) that forms water cavity 22, and the length-wise axis of bottom Cooling Holes 24 (central axis) tilts with respect to the plane vertical with cylinder axis.

Such as Fig. 2, Fig. 3, shown in Figure 7, week, groove 25 was that the cross section is the U font and from the groove of the lower surface of cylinder head 20 20 the upper surface (end face) recessed (digging down) along cylinder axis to cylinder head, and be set as, be positioned at the outside of all grooves 16 in the time of on covering on cylinder sleeve 10.

In addition, the outer circumferential face at cylinder head 20 is provided with along all grooves 26 of circumferentially accommodating O type circle (not shown).In addition, in interior all sides of all grooves 25, along being circumferentially with (the 3rd) all grooves 27 that the cross section is the U font.

By the interior all side wall surfaces that form all grooves 25, with the lower surface of the continuous cylinder head 20 of this wall and with this lower surface continuously and form the outer circumferential side wall of all grooves 27, form (first) protuberance 28 that embeds in all grooves 16.Be formed with the gap (for example 3mm) of regulation between the outer circumferential side wall of the outer circumferential side wall of protuberance 28 (forming interior all side wall surfaces of all grooves 25) and all grooves 16 of formation, be formed with the gap of regulation between the bottom surface of the lower surface of protuberance 28 (lower surface of cylinder head 20) and all grooves of formation 16 bottoms, be formed with the gap (for example 0.25mm) of regulation between the outer circumferential side wall of interior all side wall surfaces of protuberance 28 and (forming the outer circumferential side wall of all grooves 27) and all grooves 16 of formation, and protuberance 28 is outstanding along cylinder axis downwards.

In addition, by the outer circumferential side wall that forms all grooves 16, with the upper surface of the continuous cylinder sleeve 10 of this wall and with the outer circumferential face of the continuous cylinder sleeve 10 of this upper surface, form (second) protuberance 29 that embeds in all grooves 25.Be formed with the gap (for example 3mm) of regulation between interior all side wall surfaces of interior all side wall surfaces of protuberance 29 (forming the outer circumferential side wall of all grooves 16) and all grooves 25 of formation, be formed with the gap of regulation between the bottom surface of the upper surface of protuberance 29 (upper surface of cylinder sleeve 10) and all grooves of formation 25 bottoms, be formed with the gap (for example 0.45mm) of regulation between the outer circumferential side wall of the outer circumferential side wall of protuberance 29 (outer circumferential face of cylinder sleeve 10) and all grooves 25 of formation, and protuberance 29 is outstanding upward along cylinder axis.

As shown in Figure 7, all sides in the underpart of cylinder cylinder cap urceolus 21 are used space 30 along being circumferentially with exhaust, and this space 30 and all grooves 27 are communicated with by exhaust passage 31.

Exhaust passage 31 radial and uniformly-spaced arrange from the center of cylinder head 20 to outer circumferential face (being 45 degree intervals this example), have: first passage 32, this first passage 32 is at the bottom surface opening that forms all grooves 27 bottoms, and interior 20 upper surfaces extend along cylinder axis to cylinder head at cylinder head 20; And second channel 33, this second channel 33 is at the upper end portion of first passage 32 opening, and at the outer circumferential face opening of cylinder head 20, and the direction vertical with cylinder axis extended on cylinder head 20 interior edges.

, in the underpart of cylinder sleeve urceolus 11, are connected with bolt by flange 36 and are connected with the pipe joint 35 that (being equipped with) is used for connecting cooling water supplying pipe 34 (with reference to Fig. 8 and Fig. 9) to shown in Figure 10 such as Fig. 8.

Pipe joint 35 radial and uniformly-spaced arrange from the center of cylinder head 20 to outer circumferential face (being 90 degree intervals this example), one end of pipe joint 35 is formed at the underpart of cylinder sleeve urceolus 11, inserts in the bottom water cavity 12 by the through hole 38 that connects in the thickness of slab direction.The bi-side, one end of pipe joint 35 are respectively equipped with the opening 39 of seeing be rectangle (with reference to Fig. 8) to the front of bottom water cavity 12 openings, by the cooling water that cooling water supplying pipe 34 and pipe joint 35 are supplied with, upwards supply with in week along the outer circumferential face of cylinder sleeve 10 through opening 39.

In addition, an 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 are connected by the flange 40 of an end of being located at cooling water supplying pipe 34, the flange 41 of the other end of being located at pipe joint 35 and bolt 42, nut 43.

On the other hand, such as Fig. 2, Fig. 3, shown in Figure 7, be provided with the groove 44 of heat insulation usefulness at the upper surface of the cylinder sleeve 10 relative with the bottom surface that forms all grooves 27 bottoms.The groove 44 of heat insulation usefulness is that the cross section is the U font and from all grooves (for example width is that 11mm, the degree of depth are the U font groove of 26mm) of the upper surface of cylinder sleeve 10 10 the lower surface recessed (digging down) along cylinder axis to cylinder sleeve.

Adopt the cylinder sleeve 10 of this example, for example as shown in figure 11, the outlet of the first Cooling Holes 15 be located at the thickness of slab direction central part, be near stress 0 (zero) point (point that compressive stress and tensile stress do not act on), and be located at the thermal stress that acts on less than the position (zone) of 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 that forms first all grooves, its plan view shape ovalize or long-round-shape or circle.

Employing has the cooling construction of the internal-combustion engine of the cylinder sleeve 10 of this example and cylinder head 20, flow into cooling water in all grooves 16 from the outlet of top Cooling Holes 15, outer circumferential side wall (forming interior all side wall surfaces of all grooves 25) by protuberance 28 and form that the gap that forms flows in all grooves 25 between the outer circumferential side wall of all grooves 16, then, the entrance from bottom Cooling Holes 24 flows in the bottom Cooling Holes 24.

Thus, can not need the necessary cooling medium connection fittings of conventional art will import to from the cooling water that the outlet of top cooling chamber 15 is flowed out the entrance of bottom cooling chamber 24, can realize that the joining portion (joint) between cylinder sleeve 10 and the cylinder head 20 locates the simplification of structure.

In addition, owing to can not need the cooling medium connection fittings, locate the path of external diameter so can realize the joining portion (joint) between cylinder sleeve 10 and the cylinder head 20, and can realize lightweight.

In addition, employing has the cooling construction of the internal-combustion engine of the cylinder sleeve 10 of this example and cylinder head 20, be positioned at cylinder head 20 lower end surfaces of all grooves 16 and all grooves 25 all sides on covering on cylinder sleeve 10 time, the interior perimembranous of 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 that is located at cylinder head 20 by flowing into all groove 27 interior combustion gas between cylinder sleeve 10 upper-end surfaces and cylinder head 20 lower end surfaces, therefore, can not need that conventional art is necessary releases the relief valve that exhaust body pressure is used when abnormal combustion, can realize the simplification of cylinder head 20 surrounding structures.

In addition, adopt the cooling construction of the internal-combustion engine of cylinder sleeve 10 with this example and cylinder head 20, exhaust passage 31 is set as by near all grooves 25, and the combustion gas by exhaust passage 31 are by by the cooling mediums cooling in all grooves 25.

Thus, the drop in temperature of the combustion gas of the opening ejection from the outer circumferential face that is located at cylinder head 20 can be made, the operating personnel's (for example engineer of boats and ships, operator) of operation safety can be guaranteed around internal-combustion engine, to carry out.

Also have, employing has the cooling construction of the internal-combustion engine of the cylinder sleeve 10 of this example and cylinder head 20, have on the outer circumferential face that is embedded in cylinder head 20, and the outer circumferential face of cylinder head 20 between form exhaust with the cylinder cylinder cap urceolus 21 in space 30, exhaust forms with space 30, will be by exhaust passage 31 outer circumferential face from the combustion gas of the outer circumferential face ejection of cylinder head 20 along cylinder head 20 guide downwards, the outer circumferential face by exhaust passage 31 from the combustion gas of the opening ejection of the outer circumferential face of being located at cylinder head 20 along cylinder head 20 is guided downwards.That is, the combustion gas from the opening ejection of the outer circumferential face of being located at cylinder head 20 can not spray to the operating personnel (for example engineer of boats and ships, operator) who carries out operation around internal-combustion engine.

Also have, employing has the cooling construction of the internal-combustion engine of the cylinder sleeve 10 of this example and cylinder head 20, when being provided with at the interior all side wall surfaces that form all grooves 16 when circumferentially accommodating all grooves 18 of O type circle, at interior all sides of all grooves 18 and cylinder sleeve 20 upper surfaces relative with the bottom surface that forms all grooves 27 bottoms, be provided with the groove 44 of the heat insulation usefulness that 20 lower surfaces are recessed into along cylinder axis to cylinder sleeve, utilize the air layers in the groove 44 that is trapped in heat insulation usefulness to reduce the heat load (convert temperature to and be approximately 10 ° of C) that is contained in the O type circle in all grooves 18.

Thus, can prevent the damage that is caused by heat of O type circle, can realize the long lifetime of O type circle, can make the maintaining interval of O type circle elongated.

Employing has the internal-combustion engine of cooling construction of the internal-combustion engine of the cylinder sleeve 10 of this example or this example, wall thickness is reduced and realize the path of external diameter, and have and can realize light-weighted cylinder sleeve, therefore can realize miniaturization and the lightweight of motor integral body.

(the second mode of execution)

The cylinder sleeve 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 major component of cooling construction of the internal-combustion engine of the cylinder sleeve of expression with present embodiment, Figure 14 is the diagram that the major component of Figure 13 is amplified expression, and Figure 15 is the plan view of a part of upper surface of the cylinder sleeve of expression present embodiment.

On the cylinder sleeve 50 of present embodiment, along being circumferentially with the groove 44 of (the 4th) all grooves 51 to replace heat insulation usefulness, on the cylinder head 60 of present embodiment, along (the 3rd) protuberance 61 that is circumferentially with all grooves 51 of embedding (the 4th), this point is not identical with above-mentioned the first mode of execution.Other structural element is identical with above-mentioned the first mode of execution, therefore, omits the explanation for these structural elements herein.

In addition, put on identical symbol for the parts identical with above-mentioned the first mode of execution.

In addition, in the present embodiment, the all groove 62 corresponding with all grooves 25 that illustrate in the first mode of execution, that the cross section is (roughly) rectangle and from the groove of the lower surface of cylinder head 60 60 the upper surface (end face) recessed (digging down) along cylinder axis to cylinder head, and be set as, be positioned at all sides of all grooves 16 in the time of on covering on cylinder sleeve 50.

In addition, the all groove 63 corresponding with all grooves 27 that illustrate in the first mode of execution, that the cross section is (roughly) rectangle and from the groove of the lower surface of cylinder head 60 60 the upper surface (end face) recessed (digging down) along cylinder axis to cylinder head, and be set as, be positioned at all sides of all grooves 62 in the time of on covering on cylinder sleeve 50.

In addition, in the present embodiment, protuberance 28 protrudes, at the outer circumferential side wall (wall relative with interior all side wall surfaces of protuberance 29) of protuberance 28 and form the gap (for example 0.25mm) that is formed with regulation between the outer circumferential side wall of all grooves 16, at the lower surface (lower surface of cylinder head 60) of protuberance 28 and form the gap that is formed with regulation between the bottom surface of all grooves 16 bottoms, between interior all side wall surfaces of interior all side wall surfaces of protuberance 28 and all grooves 16 of formation, be formed with the gap (for example 3mm) of regulation.In addition, the outer circumferential face at protuberance 28 is provided with along all grooves 26 of circumferentially accommodating O shape circle (not shown).

Also have, in the present embodiment, by the wall of the inner peripheral surface that forms all grooves 16, form continuously the wall of the outer circumferential face of all grooves 51 with the upper surface of the continuous cylinder sleeve 50 of this wall and with this upper surface, form (the 3rd) protuberance 52 that embeds all grooves 62.Protuberance 52 is outstanding upward along cylinder axis, and at the outer circumferential side wall (wall relative with interior all side wall surfaces of protuberance 28) of protuberance 52 and form the gap (for example 0.25mm) that is formed with regulation between interior all side wall surfaces (forming the outer circumferential side wall of all grooves 62) of protuberance 28, at the lower surface (lower surface of cylinder head 60) of protuberance 52 and form the gap that is formed with regulation between the bottom surface of all grooves 51 bottoms, between the outer circumferential side wall of interior all side wall surfaces (wall relative with the outer circumferential side wall of protuberance 61) of protuberance 52 and formation protuberance 61, be formed with the gap (for example 0.25mm) of regulation.

Also have, by the wall of the inner peripheral surface that forms all grooves 62, form continuously the wall of the outer circumferential face of all grooves 63 with the lower surface of the continuous cylinder head 60 of this wall and with this lower surface, form (the 4th) protuberance 61 of all grooves 51 of embedding.Protuberance 61 protrudes, at the outer circumferential side wall (wall relative with interior all side wall surfaces of protuberance 29) of protuberance 61 and form the gap (for example 0.25mm) that is formed with regulation between the outer circumferential side wall of all grooves 16, at the lower surface (lower surface of cylinder head 60) of protuberance 61 and form the gap that is formed with regulation between the bottom surface of all grooves 16 bottoms, between interior all side wall surfaces of interior all side wall surfaces of protuberance 61 and all grooves 16 of formation, be formed with the gap (for example 3mm) of regulation.In addition, the outer circumferential face at protuberance 61 is provided with along (the 5th) all grooves 64 of circumferentially accommodating O shape circle (not shown).

Adopt the cylinder sleeve 50 of present embodiment, prevent the O shape circle that gas leaks from cylinder head 60 and the mating face of cylinder sleeve 50, be configured in temperature cylinder head 60 sides lower than cylinder sleeve 50, be contained in all grooves 64 and be formed at the heat load of O shape circle of all grooves 26 of the outer circumferential face of protuberance 28, the heat load of bringing than the groove 44 of the heat insulation usefulness that illustrates in the first mode of execution is low.

Thus, can prevent O shape circle because heat damages, O shape circle can be realized long lifetime, can make the maintenance interval of O shape circle elongated.

Other action effect is identical with above-mentioned the first mode of execution, so locate that description thereof is omitted.

In addition, the present invention also is defined in above-mentioned mode of execution, can carry out various changes, distortion without departing from the spirit and scope of the present invention.

Claims

1. a cylinder sleeve is characterized in that,

Have many outer circumferential faces from this cylinder sleeve in wall and the first Cooling Holes of offering obliquely upward, have first all grooves at the central part upper-end surface, the thickness of slab direction of this cylinder sleeve,

The outlet of described the first Cooling Holes is set as, in the bottom surface that forms described first all grooves, the plan view shape ovalize of this outlet or long-round-shape or circle.

2. the cooling construction of an internal-combustion engine is characterized in that, has:

Cylinder sleeve as claimed in claim 1; And

Cylinder head, this cylinder head has many second Cooling Holes of also offering obliquely upward from the lower end surface of this cylinder head in wall, has the second week groove at peripheral part described lower end surface, the thickness of slab direction, and this cylinder head is configured on the described cylinder sleeve, the opening that will be positioned at the top of described cylinder sleeve seals

The entrance of described the second Cooling Holes is located on the wall or bottom surface that forms described second week groove.

3. the cooling construction of internal-combustion engine as claimed in claim 2, it is characterized in that, have the 3rd all grooves in the perimembranous lower end surface, the thickness of slab direction described cylinder head, that be positioned at all sides of described first all grooves and described second week groove on covering on described cylinder sleeve the time, and be provided with the exhaust passage that the combustion gas that flow between the lower end surface with the upper-end surface by described cylinder sleeve and described cylinder head in the described the 3rd all grooves import to the opening on the outer circumferential face that is located at described cylinder head.

4. the cooling construction of internal-combustion engine as claimed in claim 3 is characterized in that, described exhaust passage arranges by described second week groove neighbouringly.

5. such as the cooling construction of claim 3 or 4 described internal-combustion engines, it is characterized in that, have on the outer circumferential face that is embedded in described cylinder head and and the outer circumferential face of described cylinder head between form exhaust with the cylinder cap urceolus in space, described exhaust forms with the space, will be by described exhaust passage outer circumferential face from the combustion gas of the outer circumferential face ejection of described cylinder head along described cylinder head guide downwards.

6. such as the cooling construction of each described internal-combustion engine in the claim 3 to 5, it is characterized in that, be provided with along the 4th week groove of circumferentially accommodating O shape circle at the interior all side wall surfaces that form described first all grooves, in the upper-end surface of interior all sides of this 4th week groove and the described cylinder sleeve relative with the bottom surface of the bottom that forms described the 3rd all grooves, be provided with the groove of the recessed heat insulation usefulness in lower end surface along from cylinder axis to described cylinder sleeve.

7. such as the cooling construction of each described internal-combustion engine in the claim 3 to 5, it is characterized in that, lower end surface at described cylinder head, be provided with the 3rd protuberance that embeds the 4th week groove, the 3rd protuberance is by the wall of the inner peripheral surface that forms described second week groove, with the continuous described lower end surface of this wall, and with this lower end surface continuously and the wall that forms the outer circumferential face of described the 3rd all grooves form, this 4th week groove is located at the upper-end surface of the described cylinder sleeve of all sides that are positioned at described first all grooves, is provided with along the 5th all grooves of circumferentially accommodating O shape circle at the outer circumferential side wall that forms the 3rd protuberance.

8. an internal-combustion engine is characterized in that, has the cooling construction of each described internal-combustion engine in cylinder sleeve as claimed in claim 1 or the claim 2 to 7.