CN109500361A - Salt core and piston - Google Patents
Salt core and piston Download PDFInfo
- Publication number
- CN109500361A CN109500361A CN201910059229.5A CN201910059229A CN109500361A CN 109500361 A CN109500361 A CN 109500361A CN 201910059229 A CN201910059229 A CN 201910059229A CN 109500361 A CN109500361 A CN 109500361A
- Authority
- CN
- China
- Prior art keywords
- profile
- core
- chamber
- salt
- salt core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 150000003839 salts Chemical group 0.000 title claims abstract description 174
- 238000001816 cooling Methods 0.000 claims abstract description 113
- 230000001815 facial effect Effects 0.000 claims abstract description 64
- 239000007788 liquid Substances 0.000 claims abstract description 42
- 238000003032 molecular docking Methods 0.000 claims abstract description 8
- 230000007704 transition Effects 0.000 claims description 8
- 230000001154 acute effect Effects 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 238000009499 grossing Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 11
- 238000000465 moulding Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 235000002639 sodium chloride Nutrition 0.000 description 6
- 238000005266 casting Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000001934 delay Effects 0.000 description 2
- 230000003447 ipsilateral effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical group [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- -1 when casting Chemical group 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/105—Salt cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- 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
- F02F3/00—Pistons
- F02F3/16—Pistons having cooling means
- F02F3/20—Pistons having cooling means the means being a fluid flowing through or along piston
- F02F3/22—Pistons having cooling means the means being a fluid flowing through or along piston the fluid being liquid
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The present invention provides a kind of salt core and piston.Salt core have covering salt core top upper core face and covering salt core lower part lower core face, upper core face and lower core face docking and at docking forming salt core oral area, upper core face maximum width and lower core face maximum width are all larger than oral area width；At least one axial cross section in upper core face have upper core facial contour, upper core facial contour have first profile, first profile have towards salt core outer downside and/or or inner underside protrusion guide-contour；At least one above-mentioned axial cross section in lower core face has lower core facial contour, and lower core facial contour has the second profile, and the second profile is gradually tilted to oral area during the axial direction along salt core extends from bottom to top.Interior oil cooling passage can be formed by the salt core.Oil liquid forms strong vortex in upper chamber, has longer time of contact with cavity wall in upper chamber, and interior oil cooling passage has preferable cooling effect.
Description
Technical field
The present invention relates to vehicle accessory field more particularly to a kind of salt cores and piston.
Background technique
In diesel engine or petrol engine, the heat that combustion process generates is very high, needs to carry out piston
Force cooling.Usually oil cooling passage (also referred to as inner-cooling oil recess), inside oil cooling passage fill oil liquid, oil liquid in the inside of piston is arranged
It is shaken in interior oil cooling passage, to take away the heat of piston, reduces the temperature of piston.
The forming method of oil duct in piston includes press-fitting method, is directly cast into method, water soluble salt core method etc., wherein water-soluble
Salt core method, which refers to using salt as material, is made water-soluble salt core, when casting, salt core is put into the mold of molding piston, with salt
Type core of the core as interior oil cooling passage.After aluminum piston of casting, salt core is gone out with high pressure water, to form the shape with salt core
The consistent interior oil cooling passage of shape, size.
Interior oil cooling passage is generally annular in shape, and is formed around the axis of piston at the top of piston.Type core as interior oil cooling passage
Salt core it is equally annular in shape.
It as shown in figure 11, is the salt core of kidney-shaped as the interior cold of core moulding using a kind of common cross section (axial cross section)
In oil duct 9, oil liquid sprays into interior oil cooling passage 9 below piston and transports in interior oil cooling passage 9 along axial (direction C as shown by arrows)
It is dynamic, to cool down the top of piston while concussion in interior oil cooling passage 9.
The cross sectional shape of common salt core can also be round or track type.
Summary of the invention
How the technical problem to be solved by the present invention is to improve interior oil cooling passage to the cooling effect of piston.
In order to solve the above technical problems, the present invention provides a kind of salt core, the salt core in a ring, the outer surface of the salt core
For core face, the core face has the upper core face and lower core face being mutually butted along axial direction,
The upper core face and the lower core face form the oral area of the salt core at docking, and the oral area is along the salt core
Radial to have oral area width, the upper core face has upper core face maximum width along the radial direction of the salt core, and the lower core face is along institute
The radial direction for stating salt core has lower core face maximum width, and the upper core face maximum width and the lower core face maximum width are all larger than institute
State oral area width；
At least one axial cross section in the upper core face has upper core facial contour, and the upper core facial contour has the first round
Exterior feature, the first profile have the guide-contour of the arc protruded in the radial outside of the salt core towards the outer downside of the salt core
And/or the salt core radially inner side towards the salt core inner underside protrude arc guide-contour；
At least one axial cross section in the lower core face has lower core facial contour, and the lower core facial contour, which has, to be located at
Second profile of the radial side of the salt core, the process that second profile extends from bottom to top in the axial direction along the salt core
In be increasingly towards oral area inclination.
In at least one embodiment, second profile is linear, the extended line of second profile with it is described
Upper core facial contour intersects and is formed intersection point, and the first profile is prolonged since the intersection point across the upper axial end of the salt core
It stretches；Or
Second profile is curvilinear, and the tangent line of the upper axial end of second profile intersects with the upper core facial contour
And intersection point is formed, the first profile extends since the intersection point across the upper axial end of the salt core.
In at least one embodiment, the first profile is arc-shaped.
In at least one embodiment, the upper core facial contour and the lower core facial contour, which have, removes the first profile
With other profiles except second profile, other described profiles and the first profile and the second contour smoothing mistake
It crosses.
In at least one embodiment, other described profiles are smooth curve；Or other described profiles are curve
And the combination of the smooth transition of straight line.
In at least one embodiment, second profile is linear and has 20 degree to 70 degree with the axial direction
Angle；Alternatively,
Second profile is arc-shaped, and the tangent line held in the axial direction and the axial direction have 20 degree to 70 degree of folder
Angle.
In at least one embodiment, second profile is located at the radial outside of the salt core.
In at least one embodiment, second profile and the guide-contour of the first profile are located at described
Radial the same side of salt core；Or second profile and the guide-contour of the first profile are located at the diameter of the salt core
To not ipsilateral.
In at least one embodiment, from the position with the upper core face maximum width along the axial direction to described
During oral area extends, the radial dimension of the upper core facial contour is tapered, and from the lower core face maximum width
Position along the axial direction to the oral area extend during, the radial dimension of the lower core facial contour is tapered.
In at least one embodiment, the upper core facial contour further includes retardation profile, and the retardation profile connects institute
State the lower axial end of guide-contour and extend to the oral area, the retardation profile along the salt core radially extend or with institute
It states and forms acute angle between radial direction.
In at least one embodiment, second profile and the guide-contour be located at the salt core radial direction it is same
Side, the upper axial end of second profile are located at the oral area, and the retardation profile connects the guide-contour and described second
Profile.
In at least one embodiment, the retardation profile is linear and is formed radially with described no more than 30 degree
Angle；Alternatively,
The retardation profile is arc-shaped, and the tangent line in one end close to the oral area is not more than with described be formed radially
30 degree of angle.
In at least one embodiment, the oral area width be the lower core face maximum width or the upper core face most
The 30% to 75% of big width.
In at least one embodiment, the salt core has salt core height between the axial both ends, under described
Core face maximum width and/or the upper core face maximum width are the 50% to 100% of the salt core height.
In at least one embodiment, the upper core face maximum width is identical as the lower core face maximum width, or
The upper core face maximum width is less than the lower core face maximum width.
The present invention also provides a kind of pistons, the interior oil cooling passage including annular, and the interior oil cooling passage is in the embodiment above
Described in any item salt cores form for type core.
The present invention also provides a kind of pistons, the interior oil cooling passage including annular, and the interior oil cooling passage includes along the piston
The upper chamber axially arranged and lower chambers, the upper chamber and the lower chambers are mutually butted and form oil duct junction at docking
Portion,
The upper chamber has upper chamber's maximum width, diameter of the lower chambers along the piston along the radial direction of the piston
To with lower chambers maximum width, the oil duct oral area has an oral area width along the radial direction, upper chamber's maximum width and
The lower chambers maximum width is all larger than the oral area width；
At least one axial cross section of the upper chamber has upper chamber's profile, and upper chamber's profile has the first chamber wheel
Exterior feature, the first chamber profile have the arc protruded in the radial outside of the interior oil cooling passage towards the outer downside of the interior oil cooling passage
Directed cavity profile and/or the arc that protrudes of inner underside of radially inner side towards the interior oil cooling passage in the interior oil cooling passage lead
To chamber profile；And
At least one described axial cross section of the lower chambers has lower chambers profile, and the lower chambers profile, which has, to be located at
Second chamber profile of the radial side of the interior oil cooling passage, the second chamber profile along the interior oil cooling passage it is axial from it is lower to
The oil duct oral area inclination is increasingly towards during upper extension；
Oil liquid into the interior oil cooling passage can flow on described under the guiding role of the second chamber profile
Chamber, and by the upper chamber by forming vortex under the guiding role of the first chamber profile.
In at least one embodiment, the second chamber profile is linear, the extended line of the second chamber profile with
Upper chamber's profile intersects and is formed intersection point, and the first chamber profile is since the intersection point across the axis of the interior oil cooling passage
Extend to upper end；Or
The second chamber profile is curvilinear, the tangent line of the upper axial end of the second chamber profile and upper chamber's profile
Intersect and formed intersection point, the first chamber profile extends since the intersection point across the upper axial end of the interior oil cooling passage.
In at least one embodiment, the first chamber profile is arc-shaped.
In at least one embodiment, upper chamber's profile and the lower chambers profile, which have, removes the first chamber wheel
Other chamber profiles except the wide and described second chamber profile, other described chamber profiles and the first chamber profile and second chamber
Contour smoothing transition.
In at least one embodiment, other described chamber profiles are smooth curve；Or other described chamber profiles are
The combination of the smooth transition of curve and straight line.
In at least one embodiment, the second chamber profile is linear and has 20 degree to 70 degree with the axial direction
Angle；Alternatively,
The second chamber profile is arc-shaped, and the tangent line held in the axial direction and the axial direction have 20 degree to 70 degree of folder
Angle.
In at least one embodiment, the second chamber profile is located at the radial outside of the interior oil cooling passage.
In at least one embodiment, the extended line of the second chamber profile passes through the combustion chamber throat of the piston.
In at least one embodiment, the directed cavity profile position of the second chamber profile and the first chamber profile
In radial the same side of the interior oil cooling passage；Or the directed cavity profile of the second chamber profile and the first chamber profile
Positioned at the radially different side of the interior oil cooling passage.
In at least one embodiment, from the position with upper chamber's maximum width along the axial direction to described
During oil duct oral area extends, the radial dimension of upper chamber's profile is tapered, and from the lower chambers maximum
The position of width along the axial direction to the oil duct oral area extend during, the radial dimension of the lower chambers profile is tapered.
In at least one embodiment, upper chamber's profile further includes retardation chamber profile, and the retardation chamber profile connects
It connects the lower axial end of the directed cavity profile and extends to the oil duct oral area, the retardation chamber profile is along the interior oil cooling passage
It radially extends or forms acute angle between the radial direction.
In at least one embodiment, the second chamber profile and the directed cavity profile are located at the interior oil cooling passage
Radial the same side, the upper axial end of the second chamber profile are located at the oil duct oral area, lead described in the retardation chamber profile connection
To chamber profile and the second chamber profile.
In at least one embodiment, the retardation chamber profile is linear and is formed radially with described no more than 30 degree
Angle；Or the retardation chamber profile is arc-shaped, and in the tangent line of one end close to the oil duct oral area and the radial direction
Form the angle no more than 30 degree.
In at least one embodiment, the oral area width be the lower chambers maximum width or the upper chamber most
The 30% to 75% of big width.
In at least one embodiment, the interior oil cooling passage has interior oil cooling passage high between the axial both ends
Degree, the lower chambers maximum width and/or upper chamber's maximum width are the 50% to 100% of the interior oil cooling passage height.
In at least one embodiment, upper chamber's maximum width is identical as the lower chambers maximum width, or
Upper chamber's maximum width is less than the lower chambers maximum width.
Salt core and piston provided by the invention at least have the advantages that
Oil liquid into interior oil cooling passage is oriented to by the first time of the cavity wall with the second chamber profile and reaches upper chamber simultaneously
Along the cavity wall flowing with upper chamber's profile, second guiding of the oil liquid by the cavity wall with the first chamber profile, oil liquid exists
Flow velocity increases when by oil duct oral area during the upward chamber of lower chambers, to be formed in upper chamber strong
Vortex, oil liquid have longer time of contact in upper chamber with cavity wall, and interior oil cooling passage has preferable cooling effect.
Salt core has the shape that can mold above-mentioned interior oil cooling passage.
Detailed description of the invention
Fig. 1 is to show the signal of the integrally-built solid of a specific embodiment of salt core provided by the invention
Figure.
Fig. 2 is the axial sectional view of the salt core in Fig. 1.
Fig. 3 is to show the cross section for being located at axial side of the first specific embodiment of salt core provided by the invention
Schematic diagram shows the various pieces of core facial contour and lower core facial contour.
Fig. 4 is the cross for being located at axial side shown using the salt core in Fig. 3 as the interior oil cooling passage of the piston of core moulding
The schematic diagram in section shows oil liquid in flow trace wherein.
Fig. 5 is to show the cross section for being located at axial side of the second specific embodiment of salt core provided by the invention
Schematic diagram.
Fig. 6 is to show the cross section for being located at axial side of the third specific embodiment of salt core provided by the invention
Schematic diagram.
Fig. 7 is to show the cross section for being located at axial side of the 4th specific embodiment of salt core provided by the invention
Schematic diagram.
Fig. 8 is the cross section for being located at axial side shown using the salt core in Fig. 7 as the interior oil cooling passage of core moulding
Schematic diagram shows oil liquid in flow trace wherein.
Fig. 9 is to show the cross section for being located at axial side of the 5th specific embodiment of salt core provided by the invention
Schematic diagram.
Figure 10 is the cross section for being located at axial side shown using the salt core in Fig. 9 as the interior oil cooling passage of core moulding
Schematic diagram shows oil liquid in flow trace wherein.
Figure 11 is the cross for being located at axial side shown using existing salt core as the interior oil cooling passage of the piston of core moulding
The schematic diagram in section shows oil liquid in flow trace wherein.
Description of symbols:
Oil cooling passage in 9；
1 salt core；Core facial contour on 10；11 first profiles；11a guide-contour；13 third profiles；15 the 5th profiles；Under 20
Core facial contour；22 second profiles；24 fourth contoureds；26 the 6th profiles；Oil cooling passage in 30；31 upper chamber；110 first chamber profiles；
110a directed cavity profile；130 third chamber profiles；150 the 5th chamber profiles；32 lower chambers；220 second chamber profiles；240 the 4th chamber wheels
It is wide；260 the 6th chamber profiles；A oral area width；The upper core face maximum width of c；Core face maximum width under b；H salt core height；α second takes turns
The wide angle with axial direction；The 5th profile of β and radial angle.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all implementations consistent with this disclosure.On the contrary, they be only with it is such as appended
The example of the consistent device and method of some aspects be described in detail in claims, the disclosure.
The present invention provides a kind of salt core and a kind of piston, which can be formed with the type core that the salt core is interior oil cooling passage
Type can also form and the consistent interior oil cooling passage of profile with profile and salt core by other means.
As depicted in figs. 1 and 2, salt core 1 provided by the invention is whole annular in shape, with cricoid core and surrounds core
Cricoid core face.In other words, the outer surface of core is core face.
The salt core 1 is used when forming piston as the type core of interior oil cooling passage, the shape and the salt of the interior oil cooling passage of piston
The chamfered shape of core 1 is identical, and the corresponding site of orientation of each position of interior oil cooling passage in piston and salt core 1 is in Piston mould
Orientation it is identical.
With reference to Fig. 3, herein, " top " of definition salt core 1 molds the portion at the top of the close piston of interior oil cooling passage
Divide (that is, upper chamber), " top " of salt core 1 is located at " the axial upside " of salt core 1, and " lower part " of salt core 1 molds interior oil cooling passage
Close piston bottom part (that is, lower chambers), " lower part " of salt core 1 is located at " axial downside " of salt core 1；Also define,
Salt core 1 have it is axial and with axially vertical radial direction, the axis of cricoid core and core face around salt core formed, and salt core 1 is at this
Size radially is known as salt core width, and the size in the axial direction is known as salt core height；Also define, salt core 1 radially
It is known as " radially inner side " closer to the side of the axis of salt core 1, in salt core 1 radially further from the side of the axis of salt core 1
Referred to as " radial outside ".
As shown in figure 3, core face has axially disposed a upper core face and lower core face, upper core face and lower core face are from axial two
End starts to extend axially opposedly, so that upper core face and lower core face are covered each by the upper and lower part of salt core 1.Salt core 1 is being worn
Crossing in the plane of its axis has cross section (axial cross section), and upper core face and lower core face are respectively provided with upper core face in the cross section
Profile 10 and lower core facial contour 20.Upper core face and lower core face are docked during extension, and salt core 1 is in upper core face and lower core face
Oral area is formed at docking.
As shown in figure 4, there is axially disposed upper chamber 31 and cavity of resorption by the interior oil cooling passage 30 that above-mentioned salt core 1 molds
Room 32, upper core facial contour is identical as upper chamber's profile of upper chamber 31 of interior oil cooling passage 30, lower core facial contour and interior oil cooling passage 30
Lower chambers 32 lower chambers profile it is identical, upper chamber 31 and lower chambers 32 form oil duct oral area at docking.
The oral area of salt core 1 has oral area width a along the radial direction of salt core, and upper core facial contour 10 is during axially extending
It can have different width, and there is upper core face maximum width c；Lower core facial contour 20 can be with during axially extending
With different width, and there is lower core face maximum width b.Upper core face maximum width c and lower core face maximum width b are all larger than mouth
Portion width a.
During extension from the position with upper core face maximum width c along axial direction to oral area in upper core facial contour 10, on
The radial dimension of core facial contour 10 is tapered.In lower core facial contour 20 from the position with lower core face maximum width b along axial direction to mouth
During portion extends, the radial dimension of lower core facial contour 20 is tapered.
Size each position corresponding with the salt core 1 at each position of the interior oil cooling passage 30 molded by above-mentioned salt core 1
Size is identical.
When oil liquid flows from bottom to top in interior oil cooling passage 30, narrow oil duct junction first is passed through from broad lower chambers 32
Portion, enters back into broad upper chamber 31, and oil liquid flow velocity when passing through oil duct oral area becomes larger.
When oil liquid is after before by oil duct oral area and by oil duct oral area, with round and smooth flow trace, thus right
Oil liquid forms better guiding.
Upper core facial contour 10 has first profile 11, and first profile 11 at least has in the radial outside of salt core 1 towards salt
The guide-contour 11a of the arc of outer downside (the see, for example Fig. 3) protrusion of core 1, or salt core 1 radially inner side towards salt core
The guide-contour 11a of the arc of 1 inner underside (see, for example Fig. 7) protrusion.
Lower core facial contour 20 has linear extension or curved shape extend between the axial ends of salt core 1 second
Profile 22, the second profile 22 are gradually tilted to oral area during the axial direction along salt core 1 extends from bottom to top, the second profile 22
Core facial contour 10 in direction.
The upper chamber 31 of the interior oil cooling passage 30 molded by the salt core 1 has first chamber profile corresponding with first profile 11
110, the lower chambers 32 of the interior oil cooling passage 30 molded by the salt core 1 have second chamber profile 220 corresponding with the second profile 22.
First chamber profile 110 has directed cavity profile 110a corresponding with guide-contour 11a, has directed cavity profile 110a
Cavity wall can be oriented to oil liquid and oil liquid is made to form vortex in upper chamber 31.
As shown in figure 4, the oil liquid into interior oil cooling passage 30 is led by the first time of the second chamber profile 220 of interior oil cooling passage 30
Upper chamber 30 is reached to (as shown by arrow A), oil liquid flows in upper chamber 30 along the cavity wall with upper chamber's profile, oil
Liquid is further subjected to the cavity wall second with directed cavity profile 110a (corresponding to the guide-contour 11a of the first chamber profile 110)
Secondary guiding (as shown by arrow A) and be re-directed to upper chamber 31.
In this way, oil liquid forms strong vortex in upper chamber 31 so that oil liquid have in upper chamber 31 with cavity wall compared with
Long time of contact, interior oil cooling passage 30 can preferably cool down piston.
In addition, since lower chambers are towards shrink in lip, during oil liquid is flowed from lower chambers 32 to upper chamber 31, oil
Liquid flow velocity when by oral area increases, to be conducive to form stronger vortex in upper chamber 31.
As shown in Figure 3 and Figure 5, upper core face maximum width c and lower core face maximum width b can it is identical (as shown in Figure 3) or
Person is different, and upper core face maximum width c can be less than lower core face maximum width b (as shown in Figure 5).
Second profile 22 is located at the radial side of lower core facial contour 20, and the guide-contour 11a of first profile 11 can be with
Two profiles 22 are located at radial the same side of salt core 1.
In this way, the upper and lower part of salt core 1 is substantially axially formed, to simplify the processing technology of salt core 1.
The profile in addition to first profile 11 and the second profile 22 of upper core facial contour 10 and lower core facial contour 20 is other
Profile, other profiles, first profile 11 and the second profile 22 can connect with seamlessly transitting two-by-two.Other profiles can be smooth
Curve, or the combination for smooth curve and straight line.
Interior oil cooling passage 30 has other chamber profiles corresponding with other profiles, other chamber profiles, the first chamber profile 110 and the
Two chamber profiles 220 can connect with seamlessly transitting two-by-two.
As shown in Fig. 3, Fig. 5, Fig. 6 and Fig. 9, upper core facial contour 10 and lower core facial contour 20 are in the radial other side of salt core 1
(the diametrically opposed side with the second profile 22) linear (as shown in Fig. 3, Fig. 5 and Fig. 9) or arc are (such as Fig. 6 institute
Show), the profile of linear extension is more readily processed compared with being arc-shaped for the profile of extension.
As shown in Fig. 3, Fig. 5, Fig. 6 and Fig. 9, the second profile 22 can be located at the radial outside of lower core facial contour 20, and
Guide-contour 11a can be located at the radial outside of upper core facial contour 10, i.e. the second profile 22 and guide-contour 11a is located at radial
It is ipsilateral.
Second profile 22 can be linear, and the extended line of the second profile 22 intersects with upper core facial contour 10 and forms friendship
Point, the intersection point are located at the radially inner side of upper core facial contour 10, and first profile 11 is prolonged since intersection point across the upper axial end of salt core 1
It stretches.
As shown in Figure 10, oil liquid is oriented to (as shown by arrow A) by the first time of the second chamber profile 220 of interior oil cooling passage 30
And point of intersection is reached, it is immediately exposed to second of guiding (as shown by arrow A) of the first chamber profile 110 at this time, thus by preferably
It is oriented to and preferably forms orientation vortex.
First profile 11 can be formed as arc, and first profile 11 not only includes the guiding of the radial outside positioned at salt core 1
Profile 11a further includes the curved profile of the upper axial end positioned at salt core 1 and the curved profile of the radially inner side positioned at salt core 1.
Correspondingly, the first chamber profile 110 is again formed as arc, and the first chamber profile 110 not only includes being located at interior oil cooling passage 301
Radial outside directed cavity profile 110a, further include positioned at interior oil cooling passage 30 upper axial end curved profile and be located at it is interior cold
The curved profile of the radially inner side of oil duct 30.
The profile of arc can play better guiding role.
The radian of first profile 11 can be greater than 180 degree, this is more advantageous to the epicoele in thus molding interior oil cooling passage 30
The vortex of orientation is formed in room 31.
As shown in fig. 7, in other embodiments, the diameter that the second profile 22 may be located on lower core facial contour 20 is outside
Side, and guide-contour 11a can be located at the radially inner side of salt core 1, i.e. the second profile 22 and guide-contour 11a is located at radial two
Side.
As shown in figure 8, oil liquid is located at the second of radial outside in by the molding interior oil cooling passage 30 of the salt core 1 in Fig. 7
Chamber profile 220 is directed to upper chamber 31 (as shown in the arrow A in Fig. 8), and by with directed cavity profile in upper chamber 31
The cavity wall of 110a is oriented to and forms vortex (as shown in the arrow B in Fig. 8).Such interior oil cooling passage can equally obtain preferably
Cooling effect.
Second profile 22 may be located on the radially inner side of salt core 1, the extended line of the second profile 22 and upper core facial contour 10
Intersect and formed intersection point, which is located at the radial outside of upper core facial contour 10, by the molding interior oil cooling passage 30 of such salt core 1
Equally there is preferable cooling effect.
In other modes, the second profile 22 can with curvilinear, the tangent line of the upper axial end of the second profile 22 with it is upper
Core facial contour 10 intersects and is formed intersection point, and first profile 11 is arc-shaped and extends since intersection point across the upper axial end of salt core 1.
As shown in figure 3, can have the angle α of acute angle between the second profile 22 and the axial direction of salt core 1, such as with 20 degree
To 70 degree of angle α.
As shown in figure 4, oil liquid is directed to by the second chamber profile 220 in by the molding interior oil cooling passage 30 of such salt core 1
The interior top of interior oil cooling passage 30, oil liquid can be conducive to improve interior cold oil intensively to cooling down around the aditus laryngis of combustion chamber
Cooling effect of the road 30 to piston.
As shown in Fig. 3, Fig. 5, Fig. 6 and Fig. 9, upper core facial contour 10 can also have the 5th profile 15 (retardation profile), the
The upper axial end of two profiles 22 can be located at oral area, and the 5th profile 15 can radially extend or have in advance relative to radial
Fixed slope trend simultaneously connects first profile 11 and the second profile 22.
As shown in Fig. 4 and Figure 10, interior oil cooling passage 30 have with the consistent 5th chamber profile 150 of 15 shape of the 5th profile, the
Five chamber profiles 150 can delay the oil liquid being oriented to by the first chamber profile 110 to leave upper chamber 31.
In this way, in interior oil cooling passage 30, via 110 second of the oil liquid being oriented to of the first chamber profile again by the 5th chamber profile
150 third times are oriented to, and extend oil liquid in the residence time of upper chamber 31.
As shown in fig. 7, in other embodiments, the 5th profile 15 can not also be in the second profile 22 and first profile 11
Between connect, and the lower axial end of first profile 11 is connected on oral area.
In order to form above-mentioned slope trend, the 5th profile 15 can be linear and be not more than 30 degree with being formed radially
Angle β；Or the 5th profile 15 it is arc-shaped, and the tangent line and radial shape of one end that the 5th profile 15 is connect with the second profile 12
At the angle β for being not more than 30 degree.
It should be appreciated that the 5th chamber profile 150 of the 5th profile 15/ is located at 22/ second chamber wheel of the second profile with radial angle β
It is positive when the top of the upper end of exterior feature 220, is negative when positioned at the lower section of the upper end of 22/ second chamber profile 220 of the second profile.
When angle β spends for 0 to 30, the 5th chamber profile 150, which has oil liquid, preferably delays effect, only can in processing
There can be certain difficulty.When angle β spends for 0 to -30, processing is more convenient but delays effect slightly poor oil liquid.When
When five chamber profiles 150 radially extend, it can delay to be compromised between effect and difficulty of processing to oil liquid.
When the 5th profile 15 is linear, tangentially it connect with first profile 11, was arc-shaped with the second profile 22
It connects with crossing, in such manner, it is possible to be effectively relieved due to the problem of finish dimensional is smaller and bring salt 1 remitted its fury of core.
Oral area width a can be the 30% to 75% of lower core face maximum width b.
In this way, by the way that the intensity of salt core 1 and the guiding of oil liquid can be taken into account in the molding interior oil cooling passage 30 of the salt core 1
Two aspects of effect.
Lower core face maximum width b and/or upper core face maximum width c can be the 50% to 100% of salt core height h.
In such manner, it is possible to guarantee that salt core 1 has enough intensity, and in passing through the molding interior oil cooling passage 30 of the salt core 1,
The flowing space of oil liquid and the guide effect to oil liquid can be taken into account.
The other details of salt core 1 and interior oil cooling passage 30 provided by the invention are introduced referring to Fig. 9 and Figure 10.
In the cross section of salt core 1, the radial outside at oral area successively through upper core facial contour 10, oral area at
Radially inner side, lower core facial contour 20 are back in the path (path clockwise in such as Fig. 9) of the radial outside of oral area, core face wheel
Exterior feature successively include the 5th profile 15 of linear, the first profile 11 of arc, the third profile 13 of linear, linear the
Four profiles 24, the 6th profile 26 of linear, linear the second profile 22.Each profile is in arc transition in junction, thus
Each junction is round and smooth without sharp.
The both ends of first profile 11 are located at the radial outside and radially inner side of core facial contour 10, and first profile 11 has
There are the outermost radial outside of upper core facial contour 10 and the radially inner most of upper core facial contour 10.First profile 11 and the 5th profile 15 exist
The radial outside of salt core 1 connects, and the radially inner side with third profile 13 in salt core 1 is connect.
Third profile 13 and fourth contoured 24 are along the linear extension of axial direction of salt core 1, and in the radially inner side of salt core 1
Connection.
The radial direction linear annular that extends and form axial direction perpendicular to salt core 1 of 6th profile 26 along salt core 1
Plane.
Second profile 22 extends between the 5th profile 15 of radial outside of salt core 1 and the 6th profile 26, the second profile 22
Acute angle, the second profile 22 gradually introversion during extending axially upward, thus second are formed between the axial direction of salt core 1
The upper axial end of profile 22 is located at the radially inner side of lower axial end.
First profile 11 has the upper axial end of upper core facial contour 10, forming salt between the upper axial end and the 6th profile 26
Core height h.
When machining piston, above-mentioned salt core 1 is installed in Piston mould, goes out salt core 1 in be formed after pouring
The consistent interior oil cooling passage 30 of profile of chamber shape and core face.1 part of salt core more than oral area molds the epicoele of interior oil cooling passage 30
Room 31, oral area 1 part of salt core below mold the lower chambers 32 of interior oil cooling passage 30.Interior oil cooling passage 30 has identical as salt core 1
Axially and radially.
As shown in Figure 10, interior oil cooling passage 30, which removes, has the first chamber profile 110, the second chamber profile 220 and the 5th chamber profile 150
In addition, also have and the corresponding third chamber profile 130 of third profile 13, the 4th chamber profile 240 corresponding with fourth contoured 24 and
The corresponding 6th chamber profile 260 of 6th profile 26.
The lower end interval about 180 degree of interior oil cooling passage 30 has oil inlet and oil outlet, and oil liquid enters interior cold from oil inlet
Oil duct, and from oil outlet flow out in oil cooling passage, can by oil inlet and oil outlet setting with the 6th profile 26 the corresponding 6th
Chamber profile 260.
It should be appreciated that above-mentioned salt core 1 can have above-mentioned core facial contour throughout the circumferential, it can also be in a part of circumference
It is upper that there is above-mentioned core facial contour.
Correspondingly, oil liquid can all have above-mentioned nowed forming in the whole circumference of interior oil cooling passage 30, can also be cold inside
There is above-mentioned nowed forming on a part of circumference of oil duct 30.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to its of the disclosure
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or
Person's adaptive change follows the general principles of this disclosure and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the disclosure are by appended
Claim is pointed out.
It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and
And it can carry out various modifications and change in the case where without departing from the scope.The scope of the present disclosure is only by the attached claims
To limit.
Claims (32)
1. a kind of salt core, in a ring, the outer surface of the salt core is core face to the salt core, and the core face is along axial with mutually right
The upper core face and lower core face connect, which is characterized in that
The upper core face and the lower core face form the oral area of the salt core, radial direction of the oral area along the salt core at docking
With oral area width, the upper core face has upper core face maximum width along the radial direction of the salt core, and the lower core face is along the salt
The radial direction of core has lower core face maximum width, and the upper core face maximum width and the lower core face maximum width are all larger than the mouth
Portion's width；
At least one axial cross section in the upper core face has upper core facial contour, and the upper core facial contour has first profile, institute
State first profile have the salt core radial outside towards the salt core outer downside protrude arc guide-contour and/or
In the guide-contour for the arc that the inner underside of radially inner side towards the salt core of the salt core protrudes；
At least one axial cross section in the lower core face has lower core facial contour, and the lower core facial contour has positioned at described
Second profile of the radial side of salt core, second profile during axial direction along the salt core extends from bottom to top by
Gradually tilted towards the oral area.
2. salt core according to claim 1, which is characterized in that second profile is linear, second profile
Extended line intersects and is formed intersection point with the upper core facial contour, and the first profile is since the intersection point across the salt core
Upper axial end extends；Or
Second profile is curvilinear, and the tangent line of the upper axial end of second profile intersects with the upper core facial contour and shape
Commercial base, the first profile extend since the intersection point across the upper axial end of the salt core.
3. salt core according to claim 2, which is characterized in that the first profile is arc-shaped.
4. salt core according to claim 1, which is characterized in that the upper core facial contour and the lower core facial contour, which have, to be removed
Other profiles except the first profile and second profile, other described profiles and the first profile and described second
Contour smoothing transition.
5. salt core according to claim 4, which is characterized in that other described profiles are smooth curve；Or it is described its
His profile is the combination of the smooth transition of curve and straight line.
6. salt core according to claim 1, which is characterized in that second profile is linear and has with the axial direction
20 degree to 70 degree of angle；Alternatively,
Second profile is arc-shaped, and the tangent line held in the axial direction and the axial direction have 20 degree to 70 degree of angle.
7. salt core according to claim 1, which is characterized in that second profile is located at the radial outside of the salt core.
8. salt core according to claim 1, which is characterized in that the guiding of second profile and the first profile
Profile is located at radial the same side of the salt core；Or second profile and the guide-contour of the first profile are located at
The radially different side of the salt core.
9. salt core according to claim 1, which is characterized in that from the position with the upper core face maximum width along institute
State it is axial extend to the oral area during, the radial dimension of the upper core facial contour is tapered, and from under described
The position of core face maximum width along the axial direction to the oral area extend during, the radial dimension of the lower core facial contour is gradually
Contracting.
10. salt core according to claim 1, which is characterized in that the upper core facial contour further includes retardation profile, described to prolong
Stagnant profile connects the lower axial end of the guide-contour and extends to the oral area, radial direction of the retardation profile along the salt core
Extend or forms acute angle between the radial direction.
11. salt core according to claim 10, which is characterized in that second profile and the guide-contour are positioned at described
Radial the same side of salt core, the upper axial end of second profile are located at the oral area, and the retardation profile connects the guiding
Profile and second profile.
12. salt core according to claim 10, which is characterized in that the retardation profile it is linear and with the radial shape
At the angle for being not more than 30 degree；Alternatively,
The retardation profile is arc-shaped, and is formed radially with described no more than 30 degree in the tangent line of one end close to the oral area
Angle.
13. salt core according to claim 1, which is characterized in that the oral area width be the lower core face maximum width or
The 30% to 75% of upper core face maximum width described in person.
14. salt core according to claim 1, which is characterized in that the salt core has salt between the axial both ends
Core height, the lower core face maximum width and/or the upper core face maximum width are the 50% to 100% of the salt core height.
15. salt core according to claim 1, which is characterized in that the upper core face maximum width and the lower core face are maximum
The of same size or described upper core face maximum width is less than the lower core face maximum width.
16. a kind of piston, the interior oil cooling passage including annular, which is characterized in that the interior oil cooling passage in claim 1 to 15 to appoint
Salt core described in one forms for type core.
17. a kind of piston, the interior oil cooling passage including annular, the interior oil cooling passage includes the epicoele axially arranged along the piston
Room and lower chambers, the upper chamber and the lower chambers are mutually butted and form oil duct oral area at docking, which is characterized in that
The upper chamber has upper chamber's maximum width, radial direction tool of the lower chambers along the piston along the radial direction of the piston
There is a lower chambers maximum width, the oil duct oral area has an oral area width along the radial direction, upper chamber's maximum width and described
Lower chambers maximum width is all larger than the oral area width；
At least one axial cross section of the upper chamber has upper chamber's profile, and upper chamber's profile has the first chamber profile,
The first chamber profile has the arc protruded in the radial outside of the interior oil cooling passage towards the outer downside of the interior oil cooling passage
The guiding for the arc that the inner underside of directed cavity profile and/or radially inner side towards the interior oil cooling passage in the interior oil cooling passage protrudes
Chamber profile；And
At least one described axial cross section of the lower chambers has lower chambers profile, and the lower chambers profile has positioned at described
Second chamber profile of the radial side of interior oil cooling passage, the second chamber profile prolong from bottom to top in the axial direction along the interior oil cooling passage
The oil duct oral area inclination is increasingly towards during stretching；
Oil liquid into the interior oil cooling passage can flow into the upper chamber under the guiding role of the second chamber profile,
And by the upper chamber by forming vortex under the guiding role of the first chamber profile.
18. piston according to claim 17, which is characterized in that the second chamber profile is linear, second chamber
The extended line of profile intersects and is formed intersection point with upper chamber's profile, and the first chamber profile is since the intersection point across institute
The upper axial end for stating interior oil cooling passage extends；Or
The second chamber profile is curvilinear, and the tangent line of the upper axial end of the second chamber profile intersects with upper chamber's profile
And intersection point is formed, the first chamber profile extends since the intersection point across the upper axial end of the interior oil cooling passage.
19. piston according to claim 18, which is characterized in that the first chamber profile is arc-shaped.
20. piston according to claim 17, which is characterized in that upper chamber's profile and the lower chambers profile have
Other chamber profiles in addition to the first chamber profile and the second chamber profile, other described chamber profiles and the first chamber wheel
The wide and described second chamber contour smoothing transition.
21. piston according to claim 20, which is characterized in that other described chamber profiles are smooth curve；Or institute
State the combination for the smooth transition that other chamber profiles are curve and straight line.
22. piston according to claim 17, which is characterized in that the second chamber profile it is linear and with the axial direction
With 20 degree to 70 degree of angle；Alternatively,
The second chamber profile is arc-shaped, and the tangent line held in the axial direction and the axial direction have 20 degree to 70 degree of angle.
23. piston according to claim 17, which is characterized in that the second chamber profile is located at the diameter of the interior oil cooling passage
Outward.
24. piston according to claim 17, which is characterized in that the extended line of the second chamber profile passes through the piston
Combustion chamber throat.
25. piston according to claim 17, which is characterized in that the institute of the second chamber profile and the first chamber profile
State radial the same side that directed cavity profile is located at the interior oil cooling passage；Or the second chamber profile and the first chamber profile
The directed cavity profile is located at the radially different side of the interior oil cooling passage.
26. piston according to claim 17, which is characterized in that from the position edge with upper chamber's maximum width
During the axial direction extends to the oil duct oral area, the radial dimension of upper chamber's profile is tapered, and from having
The position of the lower chambers maximum width along the axial direction to the oil duct oral area extend during, the lower chambers profile
Radial dimension is tapered.
27. piston according to claim 17, which is characterized in that upper chamber's profile further includes retardation chamber profile, institute
It states retardation chamber profile to connect the lower axial end of the directed cavity profile and extend to the oil duct oral area, the retardation chamber profile edge
The interior oil cooling passage radially extends or forms acute angle between the radial direction.
28. piston according to claim 27, which is characterized in that the second chamber profile and the directed cavity profile are located at
The upper axial end of radial the same side of the interior oil cooling passage, the second chamber profile is located at the oil duct oral area, the retardation chamber
Profile connects the directed cavity profile and the second chamber profile.
29. piston according to claim 27, which is characterized in that the retardation chamber profile it is linear and with the radial direction
Form the angle no more than 30 degree；Or the retardation chamber profile is arc-shaped, and in one end close to the oil duct oral area
Tangent line and the angle being formed radially no more than 30 degree.
30. piston according to claim 17, which is characterized in that the oral area width be the lower chambers maximum width or
The 30% to 75% of upper chamber's maximum width described in person.
31. piston according to claim 17, which is characterized in that the interior oil cooling passage has between the axial both ends
There is interior oil cooling passage height, the lower chambers maximum width and/or upper chamber's maximum width are the interior oil cooling passage height
50% to 100%.
32. piston according to claim 17, which is characterized in that upper chamber's maximum width and the lower chambers are maximum
Of same size or described upper chamber maximum width is less than the lower chambers maximum width.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910059229.5A CN109500361A (en) | 2019-01-22 | 2019-01-22 | Salt core and piston |
| CN201910440840.2A CN110076294A (en) | 2019-01-22 | 2019-05-24 | Salt core and piston |
| CN201920760454.7U CN210139037U (en) | 2019-01-22 | 2019-05-24 | Salt core and piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910059229.5A CN109500361A (en) | 2019-01-22 | 2019-01-22 | Salt core and piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109500361A true CN109500361A (en) | 2019-03-22 |
Family
ID=65758140
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910059229.5A Pending CN109500361A (en) | 2019-01-22 | 2019-01-22 | Salt core and piston |
| CN201910440840.2A Pending CN110076294A (en) | 2019-01-22 | 2019-05-24 | Salt core and piston |
| CN201920760454.7U Active CN210139037U (en) | 2019-01-22 | 2019-05-24 | Salt core and piston |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910440840.2A Pending CN110076294A (en) | 2019-01-22 | 2019-05-24 | Salt core and piston |
| CN201920760454.7U Active CN210139037U (en) | 2019-01-22 | 2019-05-24 | Salt core and piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN109500361A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810410A (en) * | 2022-05-10 | 2022-07-29 | 潍柴动力股份有限公司 | Piston and engine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109500361A (en) * | 2019-01-22 | 2019-03-22 | 马勒汽车技术（中国）有限公司 | Salt core and piston |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101371313B1 (en) * | 2012-05-03 | 2014-03-10 | 자동차부품연구원 | Salt core for forming engine piston cooling gallery and Method of manufacturing the same |
| DE102012014193A1 (en) * | 2012-07-18 | 2014-05-15 | Mahle International Gmbh | Piston for an internal combustion engine |
| DE102012017217A1 (en) * | 2012-08-31 | 2014-05-15 | Mahle International Gmbh | Piston for an internal combustion engine |
| DE102017205717A1 (en) * | 2017-04-04 | 2018-10-04 | Mahle International Gmbh | Piston of an internal combustion engine |
| CN109500361A (en) * | 2019-01-22 | 2019-03-22 | 马勒汽车技术（中国）有限公司 | Salt core and piston |
-
2019
- 2019-01-22 CN CN201910059229.5A patent/CN109500361A/en active Pending
- 2019-05-24 CN CN201910440840.2A patent/CN110076294A/en active Pending
- 2019-05-24 CN CN201920760454.7U patent/CN210139037U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810410A (en) * | 2022-05-10 | 2022-07-29 | 潍柴动力股份有限公司 | Piston and engine |
| CN114810410B (en) * | 2022-05-10 | 2023-08-18 | 潍柴动力股份有限公司 | Piston and engine |
| WO2023217100A1 (en) * | 2022-05-10 | 2023-11-16 | 潍柴动力股份有限公司 | Piston and engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110076294A (en) | 2019-08-02 |
| CN210139037U (en) | 2020-03-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5103784A (en) | Squish jet combustion chamber | |
| US6047950A (en) | Throttle valve body with a tapered channel on one side of its axis and a tapered flap on the opposite side thereof | |
| US4889080A (en) | Cylinder head for an internal combustion engine | |
| CN110076294A (en) | Salt core and piston | |
| CN101668599B (en) | Casting core for forming a cooling channel in a piston produced by casting | |
| US5065715A (en) | Squish jet combustion chamber | |
| US7380536B2 (en) | Combustion bowl in the crown of a piston for a diesel engine | |
| JP2015522138A (en) | Piston for internal combustion engine | |
| JP2010014067A (en) | Cylinder block for internal combustion engine | |
| US11459976B2 (en) | Cylinder head | |
| JP2018503770A (en) | Piston cooling for opposed piston engines | |
| EP1251260B1 (en) | Internal combustion engine | |
| CN106837583A (en) | The cylinder structure of cylinder body insert and the vehicle motor including cylinder body insert | |
| KR100545693B1 (en) | Cylinder Head for Internal Combustion Engine | |
| JP2004316609A (en) | Internal combustion engine having intake port for forming tumble flow | |
| FI102491B (en) | Oil-cooled, multi-part plunger for internal combustion engines | |
| JP4869121B2 (en) | Piston for internal combustion engine | |
| JPH11287154A (en) | Piston for internal combustion engine | |
| JPS6030423Y2 (en) | internal combustion engine intake port | |
| WO2024036547A1 (en) | Internal combustion engine cast iron piston | |
| JPH06147004A (en) | Piston for internal combustion engine | |
| JP3140652B2 (en) | Structure of elbow pipe for cooling water inlet in internal combustion engine | |
| KR100249881B1 (en) | Engine Piston and Metal Mold | |
| JPH0451020Y2 (en) | ||
| JPS6321687Y2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190322 |
|
| WD01 | Invention patent application deemed withdrawn after publication |