WO2005116462A2 - Bearing - Google Patents
Bearing Download PDFInfo
- Publication number
- WO2005116462A2 WO2005116462A2 PCT/IB2005/002353 IB2005002353W WO2005116462A2 WO 2005116462 A2 WO2005116462 A2 WO 2005116462A2 IB 2005002353 W IB2005002353 W IB 2005002353W WO 2005116462 A2 WO2005116462 A2 WO 2005116462A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bearing
- ramped
- internal
- crankshaft
- lubricating fluid
- Prior art date
Links
Classifications
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/106—Details of distribution or circulation inside the bearings, e.g. details of the bearing surfaces to affect flow or pressure of the liquid
- F16C33/1075—Wedges, e.g. ramps or lobes, for generating pressure
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/06—Lubricating systems characterised by the provision therein of crankshafts or connecting rods with lubricant passageways, e.g. bores
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
- F16C3/06—Crankshafts
- F16C3/14—Features relating to lubrication
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
- F16C9/02—Crankshaft bearings
Definitions
- This invention relates to a novel bearing and methods for recovering lubricating fluid pressure in rotating machinery, and engines containing such bearings.
- the entering oil undergoes a pressure drop between the external pressure gallery and the big end bearing; for instance, the oil may drop in pressure from 60psi (4 bar) in the external pressure gallery down to 30psi (2 bar) at the big end bearing, in a common automotive engine.
- T us because of this pressure drop, in order to achieve a desired oil pressure at the big end bearing, the external gallery must have a high oil pressure. Therefore, large pumps must be used to pressurize the external gallery, which add cost and weight to the engine. To alleviate such problems, attempts have been made to force oil through the end of the crankshaft, but these techniques have proved awkward and expensive.
- a bearing for passage of a lubricating fluid comprising at least one opening communicating between an interior of the bearing and an exterior of the bearing, the opening being shaped to increase a pressure of the lubricating fluid as it flows past the opening, such that the bearing acts to urge the lubricating fluid in one direction between the interior and the exterior of the bearing.
- the or each opening may comprise a ramped cavity on an internal surface such that it acts to urge the lubricating fluid toward the interior of the bearing.
- the or each opening may be ramped in two directions, to form an internal cavity comprising on one side of the opening first a long ramp and a second relatively short ramp on the other side of the opening.
- the or each ramp may be curved.
- a first ramp may comprise a long radius of curvature and a second ramp may comprise a relatively short radius of curvature.
- the or each ramp may be substantially flat.
- the bearing may be provided in an engine.
- the bearing may be a main bearing of a crankshaft of an internal combustion engine.
- the bearing may act to urge oil from the exterior of the main bearing to an internal pressure gallery of the crankshaft.
- the method comprises forming a plurality of openings communicating between an interior of the bearing and an exterior of the bearing, the openings being shaped to increase a pressure of the lubricating fluid as it flows past the openings, such that the shape of the openings acts to urge the lubricating fluid in one direction between the interior and the exterior of the bearing.
- the method may comprise forming a plurality of ramped openings.
- the method may also comprise forming each of the plurality of ramped openings by forming a first ramp having a longer radius of curvature and a second ramp having a shorter radius of curvature.
- the method also may comprise forming the ramped openings on the interior surface of the bearing.
- the bearing may act to urge the lubricating fluid into or out of the interior of the bearing.
- the or each ramp may be substantially flat.
- the bearing may be a main bearing of a crankshaft of an internal combustion engine.
- the bearing may act to urge oil from the exterior of the main bearing to an internal pressure gallery of the crankshaft.
- a bearing and rotatable shaft supported within the bearing, the bearing comprising at least one external opening communicating with an exterior of the bearing, wherein at least one of the bearing and shaft comprises a ramped cavity, each cavity communicating with one of the at least one external openings and an interior of the shaft such that, in use, a lubricating fluid is urged in one direction between the external opening and the interior of the shaft.
- the rotating shaft may comprise an internal pressure gallery for receiving lubricating fluid pressurized in the at least one ramped cavity as the shaft rotates.
- the bearing may comprise the main bearing of a crankshaft and the or each ramped cavity may be provided on an internal surface thereof.
- Each of the at least one ramped cavities may comprise a longer portion having a greater radius of curvature than a radius of curvature of a shorter portion of the ramped cavities.
- the bearing may comprise
- the bearing may comprise four ramped cavities on one side of the centreline and two ramped internal cavities on the other side of the centreline.
- the bearing may comprise a shell bearing.
- the bearing may comprise a material selected from steel, metal alloy, carbon fibre, and a ceramic material.
- an engine comprising a rotating shaft, the engine comprising: a first bearing on the rotating shaft, the first bearing comprising at least one external opening communicating with an external pressure gallery, and at least one ramped internal cavity, each cavity communicating with one of the at least one external openings and an interior of the first bearing; and an internal pressure gallery of the rotating shaft for receiving lubricating fluid pressurized in the at least one ramped internal cavity as the rotating shaft rotates, the internal pressure gallery communicating with a second bearing on the rotating shaft.
- the rotating shaft may comprise a crankshaft of an internal combustion engine.
- the first bearing may comprise a main bearing of the crankshaft, and the second bearing may comprise a big end bearing of the crankshaft.
- Each of the at least one ramped internal cavities may comprise a longer portion having a greater radius of curvature than a radius of curvature of a shorter portion of the ramped internal cavities.
- the first bearing may comprise more of the at least one ramped internal cavities on one side of a centreline in a radial plane of the first bearing than on the other side of the centreline.
- the first bearing may comprise four ramped internal cavities on one side of the centreline and two ramped internal cavities on the other side of the centreline.
- the first bearing may comprise a shell bearing.
- the first bearing may comprise a material selected from steel, metal alloy, carbon fibre, and a ceramic material.
- the crankshaft may comprise a drilling selected from a low pressure drilling, an intermediate pressure drilling, and a high pressure drilling.
- In-another-embodiment-according-to-the-inventionrthere-is-disclosed-a-method for urging a lubricating fluid into an internal pressure gallery of a rotating shaft the method comprising: forming a first bearing to surround the rotating shaft, the first bearing comprising at least one external opening communicating with an exterior of the first bearing, and at least one ramped internal cavity, each cavity communicating with one of the at least one external openings and an interior of the first bearing, such that, in use, lubricating fluid in the at least one ramped internal cavity is pressurized as the rotating shaft rotates such that the lubricating fluid is urged into the internal pressure gallery.
- the internal pressure gallery may communicate between the at least one ramped internal cavity and a second bearing on the rotating shaft.
- the rotating shaft may comprise a crankshaft of an internal combustion engine.
- the first bearing may comprise a main bearing of a crankshaft on an internal combustion engine, and the second bearing may comprise a big end bearing of the crankshaft.
- Each of the at least one ramped internal cavities may comprise a longer portion having a greater radius of curvature than a radius of curvature of a shorter portion of the ramped internal cavities.
- the first bearing may comprise more of the at least one ramped internal cavities on one side of a centreline in a radial plane of the first bearing than on the other side of the centreline.
- the first bearing may comprise four ramped internal cavities on one side of the centreline and two ramped internal cavities on the other side of the centreline.
- the first bearing may comprise a shell bearing.
- the first bearing may comprise a material selected from steel, metal alloy, carbon fibre, and a ceramic material.
- the internal pressure gallery comprises a drilling selected from a low pressure drilling, an intermediate pressure drilling, and a high pressure drilling. Additional advantages and novel features of the invention will be set forth in part in " the ⁇ descripti ⁇ n ⁇ frich ⁇ follo ⁇ s7md " i ⁇ rpa in the art upon examination of the following and accompanying drawings or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS
- Fig. 1 is a three-dimensional view of a crankshaft, with which a bearing according to an embodiment of the invention may be used;
- Fig. 2A is a cross-section of a main bearing according to an embodiment of the invention, through a plane perpendicular to a radial plane of the bearing;
- Fig. 2B is a side view of a main bearing according to an embodiment of the invention;
- FIG. 2C is a cross-section of a main bearing according to an embodiment of the invention, through a plane perpendicular to a radial plane of the bearing, viewed in a direction opposite to that of Fig. 2A;
- Fig. 2D is a three-dimensional view of a main bearing according to an embodiment of the invention, looking from above a set of external openings in the bearing;
- Fig. 2E is a cross-section of a main bearing according to an embodiment of the invention, in a plane parallel to the radial plane of the bearing;
- Fig. 3 is a cross-section of the main bearing surrounding the crankshaft, in accordance with an embodiment of the invention;
- Fig. 4 is a crankshaft having an intermediate pressure drilling, with which an embodiment according to the invention may be used;
- Fig. 5 is a crankshaft having a high pressure drilling, with which an embodiment according to the invention may be used; and
- -Eig ⁇ 6- is a-crankshaft-having -low-pressure ⁇ dr-illing r with- ⁇ vhich an embodiment according to the invention may be used.
- Fig. 1 shows a three-dimensional view of a crankshaft of an internal combustion engine, with which an embodiment of the invention may be used.
- a main bearing surrounds a main bearing section 100 of the crankshaft; and a big end bearing surrounds a big end section 101 of the crankshaft, which drives the pistons via connecting rods.
- the big end sections 101 are followed by counterweights 102.
- prior art techniques for lubricating the crankshaft bearings required high oil pressures in the external galleries surrounding the main bearing, necessitating the use of large oil pumps, with attendant weight and expense.
- a main bearing 200 uses a plurality of ramped internal cavities 201-206 to assist in pumping oil into the main bearing 200, thereby reducing the external oil pressure required to achieve a given oil pressure at the big end bearing.
- Incoming oil from outside the bearing travels in through external openings 207-212, and the opening of the crankshaft's internal gallery rotates past the bearing's internal cavities 201-206. As it does so, the oil is squeezed up ramped internal cavities 201-206, creating a hydrodynamic film, and increasing the local oil pressure.
- the ramped shape of the internal cavities 201-206 thereby effectively assists in pumping the oil through the bearing 200 and into the crankshaft's internal gallery.
- the main bearing 200 of the embodiments of Figs. 2A-2E has a number of advantages over prior art techniques for lubricating the crankshaft bearings. Because in use, the ramped internal cavities 201-206 assist in urging oil through the bearing and into the crankshaft's internal gallery, the oil pressure drop between the external pressure gallery and the big end bearing is reduced. For example, a previous technique may have required an external oil pressure of 60psi (4 bar) to achieve a big end bearing pressure of 30psi (2 bar) for a given crankshaft design, in a typical automotive engine. However, using a main bearing 200 according to the embodiment of Figs.
- an external oil pressure of only 40psi (2 2/3 bar) is required to achieve the same 30psi (2 bar) pressure at the big end bearing.
- the pump used to pressurize the oil in the external gallery can be smaller; which means that the engine can be lighter, less expensive, and use less material.
- the engine can have a smaller oil volume, so that the engine loses less heat to the oil and a leaner fuel mixture can be used, thereby increasing fuel economy.
- the reduced oil volume also requires less oil pumping during the engine's use; and less scavenging-out.
- the durability of components, such as the big end bearings, is increased. Smaller oil cooling mechanisms can be used.
- Fig. 2E shows a cross-section C-C of main bearing 200 through axis 213 of Fig. 2C.
- the main bearing 200 has a plurality of ramped internal cavities 201-206, each opening into one of a plurality of external openings 207-212. Oil passes from an external pressure gallery surrounding the main bearing 200, through the external openings 207-212, and into the ramped internal cavities 201-206.
- the main bearing 200 preferably has six cavities 201-206, with four on one side of a centreline and two on the other side of the centreline; but other numbers of cavities, and spacings of the cavities around the bearing, may be used.
- the main bearing 200 is here a -shell bearing,-butthe-invention may-also-be adapted-to-other-forms-of"bearingsr ⁇
- the main bearing 200 may have a thickness 214 of 1.5mm from the inside of the shell to the outside; the radius of curvature of the longer portion 215 of the ramped internal cavities may be 18.63mm; the radius of curvature of the shorter portion 216 of the ramped internal cavities may be 5.03mm; and the distance 217 between the centreline 218 and the edge line 219 of the longer curve of the ramped internal cavities, may be 11.47mm.
- these dimensions are not limiting, and other dimensions may be used in accordance with embodiments of the invention.
- the ramped channel(s) or cavities may be flats as opposed to curved.
- Fig. 2A shows a cross-section A-A of main bearing 200 through axis 220 of Fig. 2B;
- Fig. 2B shows a side-view of the main bearing 200;
- Fig. 2C shows a cross-section B-B through axis 220 of Fig. 2B;
- Fig. 2D shows a three-dimensional view of bearing 200 from above external openings 208-210.
- Fig. 3 shows a cross-section of the main bearing 300 surrounding the crankshaft 301, in accordance with an embodiment of the invention.
- oil in the external gallery 302 flows through an external opening 303 in the main bearing, and into a ramped internal cavity 304, which has a portion with a longer radius of curvature 305 and a portion with a shorter radius of curvature 306.
- a ramped internal cavity 304 which has a portion with a longer radius of curvature 305 and a portion with a shorter radius of curvature 306.
- frictional forces drag inbound oil along the internal surface of the long ramp.
- the pressure towards the lower volume end of the cavity 304 grows the oil is urged in the direction of arrows 308 (i.e. with a major component of motion towards the centre of rotation of the crankshaft).
- This arrangement in effect uses a hydrodynamic pressure action which "pumps" the oil in the direction of the drilling 309 and against the action of the centripetal forces generated by the rotation of the crankshaft and oil. Because of the increased oil pressure 308 in the ramped internal cavity -304 r the-oil-will-be-urged-down-into-the-internal-pressure-gallery-309-ofthe crankshaft s the internal pressure gallery 309 rotates past the ramped internal cavity 304. From the internal gallery 309, the oil is conducted to the big end bearing further along the crankshaft.
- an embodiment according to the invention assists the flow of oil from external gallery 302 into the internal pressure gallery 309 and to the big end bearing, thereby reducing the oil pressure required in the external gallery 302.
- a main bearing 200 according to an embodiment of the invention may be used with a variety of different crankshaft designs, see for example, the embodiments of Figs. 4-6.
- an intermediate pressure drilling 401 is used for the crankshaft internal gallery, which connects a main bearing section 402 with a big end bearing section 403.
- a drilling 404 may connect the crankshaft internal gallery with the big end bearing.
- a main bearing according to an embodiment of the invention may be used with a mirror drilled crankshaft 500, in which a high pressure drilling 501 connects the main bearing section to the big end bearing section 502.
- a main bearing according to an embodiment of the invention may be used with a low pressure drilled crankshaft 600, in which a low pressure drilling 601 connects the main bearing section 602 to the big end bearing section 603.
- Other crankshaft designs may be used in accordance with the invention.
- an embodiment according to the invention may be used in other contexts in which it is useful to reduce the lubricating fluid pressure in rotating machinery, by assisting the flow of the fluid through a bearing.
- suitable materials such as steel or metal alloys, carbon-fibFe-mater-ialSrand-eeramic-materialsr-This-list-is-not-limiting: It is also possible, in accordance with an embodiment of the invention, to use a bearing and ramped channel to assist in urging fluid from the inside of a bearing to its outside. In this case, for example, the ramped cavities of Fig. 2E can be positioned on the outside of the crank opposite an opening in the bearing.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Sliding-Contact Bearings (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002566657A CA2566657A1 (en) | 2004-05-14 | 2005-05-16 | Bearing |
EP05766620A EP1745218A2 (en) | 2004-05-14 | 2005-05-16 | Bearing |
AU2005248150A AU2005248150A1 (en) | 2004-05-14 | 2005-05-16 | Bearing |
JP2007512599A JP2007537410A (en) | 2004-05-14 | 2005-05-16 | bearing |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0410875.9 | 2004-05-14 | ||
US10/845,889 | 2004-05-14 | ||
US10/845,889 US7194995B2 (en) | 2004-05-14 | 2004-05-14 | Bearing |
GB0410875A GB2416005B (en) | 2004-05-14 | 2004-05-14 | Bearing |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005116462A2 true WO2005116462A2 (en) | 2005-12-08 |
WO2005116462A3 WO2005116462A3 (en) | 2007-01-25 |
Family
ID=35149451
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2005/002353 WO2005116462A2 (en) | 2004-05-14 | 2005-05-16 | Bearing |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1745218A2 (en) |
JP (1) | JP2007537410A (en) |
KR (1) | KR20070072427A (en) |
AU (1) | AU2005248150A1 (en) |
CA (1) | CA2566657A1 (en) |
WO (1) | WO2005116462A2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2896553A1 (en) * | 2006-01-26 | 2007-07-27 | Vianney Rabhi | Crankshaft for e.g. internal combustion engine, has hydrodynamic bearings that are lubricated by pressurized oil brought by orifices, and does not comprise balance weight, where each hydrodynamic bearing has smooth cylindrical surface |
FR2910091A1 (en) * | 2006-12-19 | 2008-06-20 | Renault Sas | HYDRODYNAMIC BEARING |
CN107061965A (en) * | 2016-12-27 | 2017-08-18 | 北京首钢国际工程技术有限公司 | Rim lubricating device oiling guide rail |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB889194A (en) * | 1958-02-12 | 1962-02-07 | Ass Elect Ind | Improvements in oil-lubricated bearings |
GB1060387A (en) * | 1964-05-13 | 1967-03-01 | Vseojuzny Teplotekhnichesky Ni | Self-lubricating fluid bearing |
GB1313195A (en) * | 1969-12-19 | 1973-04-11 | Sulzer Ag | Internal combustion piston engines |
US6202620B1 (en) * | 1998-09-04 | 2001-03-20 | Nissan Motor Co., Ltd. | Lubricating structure for internal combustion engine |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06272708A (en) * | 1993-03-16 | 1994-09-27 | Nissan Motor Co Ltd | Piston cooling device for internal combustion engine |
-
2005
- 2005-05-16 CA CA002566657A patent/CA2566657A1/en not_active Abandoned
- 2005-05-16 KR KR1020067026297A patent/KR20070072427A/en not_active Application Discontinuation
- 2005-05-16 EP EP05766620A patent/EP1745218A2/en not_active Withdrawn
- 2005-05-16 WO PCT/IB2005/002353 patent/WO2005116462A2/en active Application Filing
- 2005-05-16 JP JP2007512599A patent/JP2007537410A/en active Pending
- 2005-05-16 AU AU2005248150A patent/AU2005248150A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB889194A (en) * | 1958-02-12 | 1962-02-07 | Ass Elect Ind | Improvements in oil-lubricated bearings |
GB1060387A (en) * | 1964-05-13 | 1967-03-01 | Vseojuzny Teplotekhnichesky Ni | Self-lubricating fluid bearing |
GB1313195A (en) * | 1969-12-19 | 1973-04-11 | Sulzer Ag | Internal combustion piston engines |
US6202620B1 (en) * | 1998-09-04 | 2001-03-20 | Nissan Motor Co., Ltd. | Lubricating structure for internal combustion engine |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2896553A1 (en) * | 2006-01-26 | 2007-07-27 | Vianney Rabhi | Crankshaft for e.g. internal combustion engine, has hydrodynamic bearings that are lubricated by pressurized oil brought by orifices, and does not comprise balance weight, where each hydrodynamic bearing has smooth cylindrical surface |
WO2007085738A1 (en) * | 2006-01-26 | 2007-08-02 | Vianney Rabhi | Crankshaft for a variable compression ratio engine |
US20100224164A1 (en) * | 2006-01-26 | 2010-09-09 | Vianney Rabhi | Crankshaft for a variable compression ratio engine |
FR2910091A1 (en) * | 2006-12-19 | 2008-06-20 | Renault Sas | HYDRODYNAMIC BEARING |
WO2008074949A1 (en) * | 2006-12-19 | 2008-06-26 | Renault S.A.S. | Hydrodynamic bearing |
CN107061965A (en) * | 2016-12-27 | 2017-08-18 | 北京首钢国际工程技术有限公司 | Rim lubricating device oiling guide rail |
CN107061965B (en) * | 2016-12-27 | 2022-05-27 | 北京首钢国际工程技术有限公司 | Oiling guide rail of wheel rim lubricating device |
Also Published As
Publication number | Publication date |
---|---|
KR20070072427A (en) | 2007-07-04 |
AU2005248150A1 (en) | 2005-12-08 |
JP2007537410A (en) | 2007-12-20 |
CA2566657A1 (en) | 2005-12-08 |
EP1745218A2 (en) | 2007-01-24 |
WO2005116462A3 (en) | 2007-01-25 |
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