WO2010002293A1 - Piston for an internal combustion engine - Google Patents
Piston for an internal combustion engine Download PDFInfo
- Publication number
- WO2010002293A1 WO2010002293A1 PCT/SE2008/000426 SE2008000426W WO2010002293A1 WO 2010002293 A1 WO2010002293 A1 WO 2010002293A1 SE 2008000426 W SE2008000426 W SE 2008000426W WO 2010002293 A1 WO2010002293 A1 WO 2010002293A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- oil
- piston
- cooling channel
- top surface
- cooling
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/06—Arrangements for cooling pistons
- F01P3/10—Cooling by flow of coolant through pistons
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J1/00—Pistons; Trunk pistons; Plungers
- F16J1/09—Pistons; Trunk pistons; Plungers with means for guiding fluids
Definitions
- the present invention relates to a cooling structure for an internal combustion engine piston according to the preambles of the independent claims .
- Cooled pistons having an oil inlet are known from example US 3221718 and DE 3733964.
- the oil inlets used as catch funnels for cooling oil that is dispensed from an oil spraying nozzle connected with the engine housing have inners walls that are configured to be funnel shaped, cylindrical, oval or in the form of a venture jet.
- additional dividers are inserted into the wall of the cooling duct, which lie opposite the exit surface of the oil inlet.
- US 7 051 684 tries to overcome the above mentioned problems and shortcomings.
- US 7 051 684 there is still a problem with the fill level in the oil cooling duct and the amount of oil circulating in said oil cooling duct in said piston for achieve sufficient cooling of the piston.
- the oil level in the oil duct in said piston becomes to small.
- the small oil level may cause too much air to be mixed with the oil when the engine rev is in a higher range. Air is a very bad thermal conductor, which decreases the cooling efficiency dramatically.
- Another problem with the design of US 7 051 684 is that the circulation of oil in the oil cooling duct is too low. A too low circulation of oil in the oil cooling duct will further decrease the cooling efficiency.
- An object of the invention therefore is to provide a cooling structure for an internal combustion piston which is more efficient compared to the conventional structures.
- a cooling structure for an internal combustion engine piston comprising an oil cooling channel integrated in said piston.
- Said oil cooling channel having a bottom surface facing towards a top surface of said piston and a top surface facing away from said top surface of the piston, said oil cooling channel is provided with an oil inlet and an oil outlet which are laterally separated from each other.
- Said bottom surface and/or said top surface of said oil cooling channel is slanted relative to a central axis of wrist pin opening provided in said piston.
- An advantage of this aspect is that the oil flow can be better controlled resulting in improved cooling efficiency. Another advantage is that oil may be forced from the oil inlet to the oil outlet in almost a complete rotation of a crank axle in said internal combustion engine.
- said bottom surface is slanted downwards, relative to said wrist pin opening, from the oil inlet to the oil outlet.
- An advantage of this embodiment is that oil is forced to the outlet automatically while the piston is moved from a Bottom Dead Centre (BDC) to a Top Dead Centre (TDC) .
- said top surface is slanted upwards, relative to said wrist pin opening, from the oil inlet to the oil outlet.
- An advantage of this embodiment is that oil is forced to the outlet automatically while the piston is moved from the TDC to the BDC.
- said oil outlet is provided with a mechanical stop.
- An advantage of this embodiment is that the oil level can be better controlled.
- said oil inlet is provided with a mechanical stop.
- An advantage of this embodiment is that the oil circulation can be better controlled.
- a method of cooling a piston in an internal combustion engine comprising the steps of: providing an oil cooling channel in said piston, providing oil into said oil cooling channel via an oil inlet, transferring oil from said oil inlet to an oil outlet provided in said oil channel, forcing said oil from said oil inlet to said oil outlet by a bottom surface of said oil cooling channel which is slanted relative to a central axis of a wrist pin opening provided in said piston while said piston is moving from a Bottom Dead Centre (BDC) to a Top Dead Centre (TDC) and/or by a top surface of said oil cooling channel which is slanted in an opposite direction relative said bottom surface while said piston is moving from the TDC to the BDC.
- BDC Bottom Dead Centre
- TDC Top Dead Centre
- fig. 1 is a schematic cross sectional view of an example embodiment of a cooling structure for an internal combustion engine piston according to the present invention
- Figure 1 depicts schematically a cross sectional view of an example embodiment according to the present invention of a cooling structure for an internal combustion engine piston 100.
- Said piston 100 comprising a body 101, a top surface 112, a combustion chamber cavity 114, an oil cooling channel 102, a wrist pin opening 104, an oil inlet 121, an oil inlet mechanical stop 120, an oil outlet 131, and an oil outlet mechanical stop 130.
- Oil is provided to the oil cooling channel 102 in said piston by a nozzle 145 attached to an oil pump 140.
- the oil is injected into the oil inlet 121 in the piston from below as indicated by arrows 147 in figure 1.
- the oil pump 140 may be the same pump as used to circulate oil to the engine bearings.
- a separate pump 140 may also be used for injecting oil to the pistons.
- the combustion chamber cavity is typical for self igniting engines such as diesel engines.
- a top portion in natural aspirated gasoline engines may very well have the opposite, i.e., instead of a cavity a dome for increasing the compression ratio.
- the body 101 of the piston 100 may be manufactured of any material which can resist the temperatures in the combustion chamber, mainly aluminum alloys are used for that purpose though other alloys may be seen.
- the position of the wrist pin hole 104 is located below the oil cooling channel 102.
- the position of the wrist pin hole may vary between different piston designs and may be arranged close to the top of the piston, in the middle or closer to the bottom of the piston.
- the oil cooling channel 102 is integrated in the piston 100. Said oil cooling channel 102 having a bottom surface facing towards the top surface 112 of said piston 100 and provided with an oil inlet 121 and an oil outlet 131 which are laterally separated to each other. The bottom surface of said oil cooling channel 102 is slanted relative to a central axis of a wrist pin opening 104 provided in said piston 100.
- said slanted bottom surface of said oil cooling channel 102 is better understood from lines 180 and 182.
- Line 184 is a line representing the central axis of the piston 100.
- Line 182 represents a line perpendicular to said central axis 184 of the piston 100.
- Line 180 represents a line in parallel with the bottom surface of said oil cooling channel 102.
- the bottom surface is slanted downwards from the oil inlet 121 to the oil outlet 131 in figure 1.
- a slope is indicated is denoted by 108 may be in the range of 0.1-20 degrees.
- a top surface of said oil cooling channel 102 may be slanted in an opposite direction compared to the bottom surface, i.e., when the piston is moved from is moved from the TDC to the BDC oil is forced to the top surface of the oil cooling channel and due to its slope forced from the oil inlet 121 to the oil outlet 131.
- the oil outlet is provided with the mechanical stop 130. This mechanical stop 130 serves to prohibit all oil from escaping from the oil cooling channel 102, i.e., the stop will make sure that there is always some oil in the oil cooling channel 102 for cooling the piston 100. By selecting a suitable slope of the bottom surface of the oil cooling channel one may optimize the cooling efficiency to ones desire.
- the oil inlet 121 is also provided with a mechanical stop 120.
- This mechanical stop 120 has the functionality to prevent oil from escaping out of the oil inlet 121, i.e., forcing the oil to circulate from the oil inlet 121 to the oil outlet 131.
- a height of the mechanical stop 130 is denoted with 110, which may be selected out of the desired performance, i.e., a higher mechanical stop will make sure that more oil is collected within the oil cooling channel at a given moment.
- a height of the mechanical stop 120 is denoted with 106 and a higher mechanical stop 106 may result in more oil circulating to the outlet 131 at a given moment compared to if one is using a lower mechanical stop 120.
- the amount of oil injected to the oil cooling channel 102 may be determined from a pump pressure and flow from the pump 140. This may be adjusted for different purposes, i.e., a higher pump pressure may be used if one wants more cooling efficiency and/or the nozzle may be exchanged to one with more flow capacity.
- the cooling structure may be provided in a vehicle such as a lorry, truck, bus, personal car, wheel loader, construction equipment vehicles etc.
- the invention may be applied to any internal combustion engine such as diesel engine, gasoline engine, bifuel/flexifuel engine with one or a plurality of cylinders .
Abstract
The present invention relates to a cooling structure for an internal combustion engine piston. Said piston comprising an oil cooling channel integrated in said piston. Said oil cooling channel having a bottom surface facing towards a top surface of said piston and a top surface facing away from said top surface of the piston. Said oil cooling channel is provided with an oil inlet and an oil outlet which are laterally separated from each other. Said bottom surface and/or said top surface of said oil cooling channel is slanted relative to a central axis of a wrist pin opening provided in said piston.
Description
TITLE:
Piston for an internal combustion engine
TECHNICAL FIELD
The present invention relates to a cooling structure for an internal combustion engine piston according to the preambles of the independent claims .
BACKGROUND OF THE INVENTION:
Cooled pistons having an oil inlet are known from example US 3221718 and DE 3733964. The oil inlets used as catch funnels for cooling oil that is dispensed from an oil spraying nozzle connected with the engine housing have inners walls that are configured to be funnel shaped, cylindrical, oval or in the form of a venture jet. In order to achieve better distribution, in the cooling duct, of the oil captured in this manner, additional dividers are inserted into the wall of the cooling duct, which lie opposite the exit surface of the oil inlet.
Using such shaping structures, the result supposed to be achieved is that the oil stream that widens from the oil spraying nozzle is captured and passed to the cooling duct. These structures demonstrates defects in achieving a continuous oil fill level of the cooling duct, due to disadvanatageous flow and friction conditions during entry of the cooling oil into the inlet.
US 7 051 684 tries to overcome the above mentioned problems and shortcomings. However, in US 7 051 684 there is still a problem with the fill level in the oil cooling duct and the amount of oil circulating in said oil cooling duct in said piston for achieve sufficient
cooling of the piston. Especially, there is a problem if the oil level in the oil duct in said piston becomes to small. The small oil level may cause too much air to be mixed with the oil when the engine rev is in a higher range. Air is a very bad thermal conductor, which decreases the cooling efficiency dramatically. Another problem with the design of US 7 051 684 is that the circulation of oil in the oil cooling duct is too low. A too low circulation of oil in the oil cooling duct will further decrease the cooling efficiency.
SUMMARY OF THE INVENTION:
An object of the invention therefore is to provide a cooling structure for an internal combustion piston which is more efficient compared to the conventional structures.
This object is achieved by the features of the independent claims. The other claims and the description disclose advantageous embodiments of the invention.
According to a first aspect of the invention it is provided a cooling structure for an internal combustion engine piston comprising an oil cooling channel integrated in said piston. Said oil cooling channel having a bottom surface facing towards a top surface of said piston and a top surface facing away from said top surface of the piston, said oil cooling channel is provided with an oil inlet and an oil outlet which are laterally separated from each other. Said bottom surface and/or said top surface of said oil cooling channel is slanted relative to a central axis of wrist pin opening provided in said piston.
An advantage of this aspect is that the oil flow can be better controlled resulting in improved cooling efficiency.
Another advantage is that oil may be forced from the oil inlet to the oil outlet in almost a complete rotation of a crank axle in said internal combustion engine.
In another example embodiment of the present invention said bottom surface is slanted downwards, relative to said wrist pin opening, from the oil inlet to the oil outlet.
An advantage of this embodiment is that oil is forced to the outlet automatically while the piston is moved from a Bottom Dead Centre (BDC) to a Top Dead Centre (TDC) .
In another example embodiment of the present invention said top surface is slanted upwards, relative to said wrist pin opening, from the oil inlet to the oil outlet.
An advantage of this embodiment is that oil is forced to the outlet automatically while the piston is moved from the TDC to the BDC.
In still another example embodiment of the present invention said oil outlet is provided with a mechanical stop.
An advantage of this embodiment is that the oil level can be better controlled.
In yet another example embodiment of the present invention said oil inlet is provided with a mechanical stop.
An advantage of this embodiment is that the oil circulation can be better controlled.
In another aspect of the present invention it is provided a method of cooling a piston in an internal combustion engine, comprising the steps of: providing an oil cooling channel in said piston, providing oil into said oil cooling channel via an oil inlet, transferring oil from said oil inlet to an oil outlet provided in said oil channel, forcing said oil from said oil inlet to said oil outlet by a bottom surface of said oil cooling channel which is slanted relative to a central axis of a wrist pin opening provided in said piston while said piston is moving from a Bottom Dead Centre (BDC) to a Top Dead Centre (TDC) and/or by a top surface of said oil cooling channel which is slanted in an opposite direction relative said bottom surface while said piston is moving from the TDC to the BDC.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention together with the above mentioned and other objects and advantages may best be understood from the following detailed description of the embodiments, but not restricted to the embodiments, wherein is shown schematically:
fig. 1 is a schematic cross sectional view of an example embodiment of a cooling structure for an internal combustion engine piston according to the present invention,
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Figure 1 depicts schematically a cross sectional view of an example embodiment according to the present invention of a cooling structure for an internal combustion engine piston 100. Said piston 100 comprising a body 101, a top surface 112, a combustion chamber cavity 114, an oil cooling channel 102, a wrist pin opening 104, an oil inlet
121, an oil inlet mechanical stop 120, an oil outlet 131, and an oil outlet mechanical stop 130.
Oil is provided to the oil cooling channel 102 in said piston by a nozzle 145 attached to an oil pump 140. The oil is injected into the oil inlet 121 in the piston from below as indicated by arrows 147 in figure 1. The oil pump 140 may be the same pump as used to circulate oil to the engine bearings. A separate pump 140 may also be used for injecting oil to the pistons.
The combustion chamber cavity is typical for self igniting engines such as diesel engines. However, a top portion in natural aspirated gasoline engines may very well have the opposite, i.e., instead of a cavity a dome for increasing the compression ratio. These two examples illustrates that there are numerous different design of the top portion of a piston depending on which fuel is used and which purpose or performance one wants to optimize.
The body 101 of the piston 100 may be manufactured of any material which can resist the temperatures in the combustion chamber, mainly aluminum alloys are used for that purpose though other alloys may be seen.
In figure 1, the position of the wrist pin hole 104 is located below the oil cooling channel 102. The position of the wrist pin hole may vary between different piston designs and may be arranged close to the top of the piston, in the middle or closer to the bottom of the piston.
The oil cooling channel 102 is integrated in the piston 100. Said oil cooling channel 102 having a bottom surface facing towards the top surface 112 of said piston 100 and provided with an oil inlet 121 and an oil outlet 131 which are laterally separated to each other. The bottom surface
of said oil cooling channel 102 is slanted relative to a central axis of a wrist pin opening 104 provided in said piston 100.
In figure 1 said slanted bottom surface of said oil cooling channel 102 is better understood from lines 180 and 182. Line 184 is a line representing the central axis of the piston 100. Line 182 represents a line perpendicular to said central axis 184 of the piston 100. Line 180 represents a line in parallel with the bottom surface of said oil cooling channel 102. The bottom surface is slanted downwards from the oil inlet 121 to the oil outlet 131 in figure 1. A slope is indicated is denoted by 108 may be in the range of 0.1-20 degrees. When the piston is moved from a Bottom Dead Centre (BDC) to a Top Dead Centre (TDC) oil is forced to the bottom surface of the oil cooling channel and due to its slope forced from the oil inlet 121 to the oil outlet 131.
A top surface of said oil cooling channel 102 may be slanted in an opposite direction compared to the bottom surface, i.e., when the piston is moved from is moved from the TDC to the BDC oil is forced to the top surface of the oil cooling channel and due to its slope forced from the oil inlet 121 to the oil outlet 131.
In one example embodiment there is only a slope of the bottom surface of the oil cooling channel 102. In another example embodiment there is only a slope in the top surface of the oil cooling channel 102. In still another example embodiment there is a slope of the bottom surface as well as the top surface of the oil cooling channel 102. The slope of the top surface of the oil cooling channel may have a different inverse slope angle compared to the bottom surface.
The oil outlet is provided with the mechanical stop 130. This mechanical stop 130 serves to prohibit all oil from escaping from the oil cooling channel 102, i.e., the stop will make sure that there is always some oil in the oil cooling channel 102 for cooling the piston 100. By selecting a suitable slope of the bottom surface of the oil cooling channel one may optimize the cooling efficiency to ones desire.
The oil inlet 121 is also provided with a mechanical stop 120. This mechanical stop 120 has the functionality to prevent oil from escaping out of the oil inlet 121, i.e., forcing the oil to circulate from the oil inlet 121 to the oil outlet 131.
A height of the mechanical stop 130 is denoted with 110, which may be selected out of the desired performance, i.e., a higher mechanical stop will make sure that more oil is collected within the oil cooling channel at a given moment. A height of the mechanical stop 120 is denoted with 106 and a higher mechanical stop 106 may result in more oil circulating to the outlet 131 at a given moment compared to if one is using a lower mechanical stop 120. The amount of oil injected to the oil cooling channel 102 may be determined from a pump pressure and flow from the pump 140. This may be adjusted for different purposes, i.e., a higher pump pressure may be used if one wants more cooling efficiency and/or the nozzle may be exchanged to one with more flow capacity.
The cooling structure may be provided in a vehicle such as a lorry, truck, bus, personal car, wheel loader, construction equipment vehicles etc.
The invention may be applied to any internal combustion engine such as diesel engine, gasoline engine,
bifuel/flexifuel engine with one or a plurality of cylinders .
The invention must not be regarded as being limited to the examples of embodiment described above, a number of further variants and modifications being feasible without departing from the scope of the following claims.
Claims
1. A cooling structure for an internal combustion engine piston comprising an oil cooling channel integrated in said piston, said oil cooling channel having a bottom surface facing towards a top surface of said piston and a top surface facing away from said top surface of the piston, said oil cooling channel is provided with an oil inlet and an oil outlet which are laterally separated from each other, characterized in that said bottom surface and/or said top surface of said oil cooling channel is slanted relative to a central axis of a wrist pin opening provided in said piston.
2. The cooling structure according to claim 1, wherein said bottom surface is slanted downwards, relative to said wrist pin opening, from the oil inlet to the oil outlet.
3. The cooling structure according to claim 1, wherein said top surface is slanted upwards, relative said wrist pin opening, from the oil inlet to the oil outlet.
4. The cooling structure according to claim 1, 2 or 3, wherein said oil outlet is provided with a mechanical stop.
5. The cooling structure according to any one of claims 1-4, wherein said oil inlet is provided with a mechanical stop.
6. A method of cooling a piston in an internal combustion engine, comprising the steps of - providing an oil cooling channel in said piston,
- providing oil into said oil cooling channel via an oil inlet, - transferring oil from said oil inlet to an oil outlet provided in said oil channel,
- forcing said oil from said oil inlet to said oil outlet by a bottom surface of said oil cooling channel which is slanted relative to a central axis of a wrist pin opening provided in said piston while said piston is moving from a Bottom Dead Centre (BDC) to a Top Dead Centre (TDC) and/or by a top surface of said oil cooling channel which is slanted in an opposite direction relative said bottom surface while said piston is moving from the TDC to the BDC.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08767098A EP2310649A4 (en) | 2008-07-03 | 2008-07-03 | Piston for an internal combustion engine |
US13/002,339 US20110265743A1 (en) | 2008-07-03 | 2008-07-03 | Piston for an internal combustion engine |
PCT/SE2008/000426 WO2010002293A1 (en) | 2008-07-03 | 2008-07-03 | Piston for an internal combustion engine |
CN2008801301672A CN102076936A (en) | 2008-07-03 | 2008-07-03 | Piston for an internal combustion engine |
US14/192,586 US20140174384A1 (en) | 2008-07-03 | 2014-02-27 | Piston for an internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/SE2008/000426 WO2010002293A1 (en) | 2008-07-03 | 2008-07-03 | Piston for an internal combustion engine |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/002,339 A-371-Of-International US20110265743A1 (en) | 2008-07-03 | 2008-07-03 | Piston for an internal combustion engine |
US14/192,586 Continuation US20140174384A1 (en) | 2008-07-03 | 2014-02-27 | Piston for an internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010002293A1 true WO2010002293A1 (en) | 2010-01-07 |
Family
ID=41466175
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2008/000426 WO2010002293A1 (en) | 2008-07-03 | 2008-07-03 | Piston for an internal combustion engine |
Country Status (4)
Country | Link |
---|---|
US (2) | US20110265743A1 (en) |
EP (1) | EP2310649A4 (en) |
CN (1) | CN102076936A (en) |
WO (1) | WO2010002293A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104160137A (en) * | 2011-10-24 | 2014-11-19 | 马勒国际公司 | Piston for an internal combustion engine |
ITUB20154005A1 (en) * | 2015-09-29 | 2017-03-29 | Fpt Motorenforschung Ag | PISTON COOLING SYSTEM FOR AN INTERNAL COMBUSTION ENGINE |
WO2017050606A1 (en) * | 2015-09-25 | 2017-03-30 | Mahle International Gmbh | Piston for an internal combustion engine |
EP3382170A1 (en) | 2017-03-29 | 2018-10-03 | FPT Motorenforschung AG | Lubricating and cooling system for an internal combustion engine |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102269649B (en) * | 2010-06-04 | 2013-04-17 | 广西玉柴机器股份有限公司 | Online test method of piston cooling spraying hook of engine |
DE102011076369A1 (en) * | 2011-05-24 | 2012-11-29 | Mahle International Gmbh | Lower cover, particularly one- or multipart ring-shaped cover, for cooling channel of piston of internal combustion engine, has stand pipe-shaped inlet and stand pipe-shaped outlet, where inlet and outlet are formed in single piece |
DE102012215543A1 (en) * | 2012-08-31 | 2014-03-06 | Mahle International Gmbh | Casting mold of a piston |
DE102013013962A1 (en) * | 2013-08-23 | 2015-02-26 | Mahle International Gmbh | Assembly of a piston and a Anspritzdüse for an internal combustion engine |
KR20170095297A (en) | 2014-12-19 | 2017-08-22 | 페더럴-모걸 엘엘씨 | Piston with cooling gallery having enhaced oil inlet and method of construction thereof |
KR101934941B1 (en) | 2016-05-02 | 2019-01-04 | 동양피스톤 주식회사 | Piston for internal combustion engine and cooling channel core |
KR101912764B1 (en) | 2016-05-02 | 2018-10-29 | 동양피스톤 주식회사 | Piston for internal combustion engine and cooling channel core |
DE102017201137A1 (en) | 2017-01-25 | 2018-07-26 | Volkswagen Aktiengesellschaft | Piston for an internal combustion engine |
CN110513182A (en) * | 2019-09-25 | 2019-11-29 | 深圳臻宇新能源动力科技有限公司 | Piston looling system |
CN110878721B (en) * | 2019-12-05 | 2021-08-24 | 宁波吉利罗佑发动机零部件有限公司 | Piston temperature control system and method and vehicle |
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WO2007063899A1 (en) * | 2005-11-30 | 2007-06-07 | Komatsu Ltd. | Engine piston, and method for cooling the engine piston |
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2008
- 2008-07-03 EP EP08767098A patent/EP2310649A4/en not_active Withdrawn
- 2008-07-03 US US13/002,339 patent/US20110265743A1/en not_active Abandoned
- 2008-07-03 WO PCT/SE2008/000426 patent/WO2010002293A1/en active Application Filing
- 2008-07-03 CN CN2008801301672A patent/CN102076936A/en active Pending
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2014
- 2014-02-27 US US14/192,586 patent/US20140174384A1/en not_active Abandoned
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WO2007063899A1 (en) * | 2005-11-30 | 2007-06-07 | Komatsu Ltd. | Engine piston, and method for cooling the engine piston |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104160137A (en) * | 2011-10-24 | 2014-11-19 | 马勒国际公司 | Piston for an internal combustion engine |
WO2017050606A1 (en) * | 2015-09-25 | 2017-03-30 | Mahle International Gmbh | Piston for an internal combustion engine |
US10352444B2 (en) | 2015-09-25 | 2019-07-16 | Mahle International Gmbh | Piston for an internal combustion engine |
ITUB20154005A1 (en) * | 2015-09-29 | 2017-03-29 | Fpt Motorenforschung Ag | PISTON COOLING SYSTEM FOR AN INTERNAL COMBUSTION ENGINE |
EP3150821A1 (en) | 2015-09-29 | 2017-04-05 | FPT Motorenforschung AG | Internal combustion engine provided of a piston cooling system |
EP3382170A1 (en) | 2017-03-29 | 2018-10-03 | FPT Motorenforschung AG | Lubricating and cooling system for an internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
EP2310649A4 (en) | 2012-07-04 |
US20110265743A1 (en) | 2011-11-03 |
EP2310649A1 (en) | 2011-04-20 |
US20140174384A1 (en) | 2014-06-26 |
CN102076936A (en) | 2011-05-25 |
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