GB2319582A - Assembly for lubricating a small connecting-rod eye - Google Patents
Assembly for lubricating a small connecting-rod eye Download PDFInfo
- Publication number
- GB2319582A GB2319582A GB9724394A GB9724394A GB2319582A GB 2319582 A GB2319582 A GB 2319582A GB 9724394 A GB9724394 A GB 9724394A GB 9724394 A GB9724394 A GB 9724394A GB 2319582 A GB2319582 A GB 2319582A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lubricating
- oil
- rod eye
- bore
- rod
- 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.)
- Granted
Links
Classifications
-
- 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
- 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
- F16J7/00—Piston-rods
-
- 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
- F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
- F01M2001/086—Lubricating systems characterised by the provision therein of lubricant jetting means for lubricating gudgeon pins
-
- 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
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/02—Constructions of connecting-rods with constant length
- F16C7/023—Constructions of connecting-rods with constant length for piston engines, pumps or the like
-
- 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
- F16C9/04—Connecting-rod bearings; Attachments thereof
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
An assembly is for lubricating a small connecting-rod eye 4 of a connecting rod 5 of an internal combustion engine. Cooling oil is conveyed from the engine lubricating-oil circuit via a nozzle 9 into an annular cooling chamber 7, extending circularly in the piston head 6. The annular cooling chamber 7 has at least one inlet bore 8 and at least one outlet bore 10, and at least one radially extending oil feed bore 12, 13 being provided in the connecting-rod eye 4, which oil feed bore 12, 13 is connected to lubricating-oil pockets 18, 19 in the form of recesses in the wall 20 of the receiving bore. Apart from the two oil feed bores 12, 13 arranged above a transverse axis 11 of the connecting-rod eye 4, the connecting-rod eye is configured as a self-contained bearing housing, and that furthermore the lubricating-oil pockets 18, 19 have a gap depth which decreases towards the connecting rod and can be acted upon by cooling oil emerging as lubricant without pressure from the outlet bore 10 of the annular cooling chamber 7. The wall of the receiving bore is coated by sputtering in the main load areas located between the lubricating-oil pocket areas.
Description
1 Arrangement for lubricating a small connecting-rod Eye 2319582 The
invention relates to an arrangement for lubricating a small connecting-rod eye of a connecting rod of internal combustion engines with cooling oil.
A device for lubricating a small connecting-rod eye with cooling oil is known from DE 41 35 237 AI. The small connecting-rod eye has a receiving bore and a circumferential groove with a radial bore. The circumferential groove is connected via oil feed bores to lubricating-oil pockets formed in the wall of the receiving bore. Mounted in the receiving bore is a piston which has an annular cooling chamber which extends circularly in the piston head and has an inlet bore and an outlet bore. For the lubrication of the small connecting-rod eye, the lubricating oil passes under pressure through a central longitudinal bore in the shank of the connecting rod into the circumferential groove of the connecting-rod eye. From the circumferential groove, the lubricating oil for the lubrication of the piston-pin bearing flows via the oil feed bores into the lubricating-oil pockets of the receiving bore. Some of the lubricating oil is passed on, as cooling oil, via the radial bore adjoining the circumferential groove and the inlet bore to the annular cooling chamber. The heated cooling oil is conducted away out of the annular cooling chamber through an outlet bore back into the piston interior. The feeding of the cooling oil from the lubricating-oil circuit of the internal combustion chamber under pressure via a longitudinal bore in the shank of the connecting rod is complex. Moreover, the longitudinal bore weakens the shank of the connecting rod.
For the general technical background, reference is also made to DE-C 1 745 863, DE 36 03 106 Cl and DE-B 1013 129.
The present invention seeks to provide, with the simplest means possible, a pressureless supply of lubricating oil to the connecting-rod eye, which supply can be acted upon from the cooling-oil circuit of the piston.
According to the invention, there is provided an arrangement for lubricating a small connecting-rod eye of a connecting rod of reciprocating piston internal combustion engines with cooling oil which is conveyed from the lubricating-oil circuit of the internal combustion engine into a receiving bore of the connecting-rod eye and into an annular cooling chamber, extending circularly in the piston head, of a piston mounted in the receiving bore of the small connecting-rod eye, the annular 2 cooling chamber having at least one inlet bore and at least one outlet bore, and at least one radially extending oil feed bore being provided in the connecting-rod eye, which oil feed bore is connected to lubricatingoil pockets in the form of recesses in the wall of the receiving bore, wherein, apart from the two oil feed bores arranged above a transverse axis of the connecting-rod eye, the connecting-rod eye is configured as a self-contained bearing housing, and the lubricating-oil pockets have a gap depth which decreases towards the connecting rod and are adapted to be acted upon by cooling oil emerging as lubricant without pressure from the outlet bore of the annular cooling chamber.
An advantage of the lubricating device according to the invention lies in the dual use of the oil; as cooling oil for the cooling of the piston and subsequently as lubricating oil for the lubrication of the small connecting-rod eye, the cooling device being independent of the connecting rod. The cooling oil is injected in a specifically directed manner into the annular cooling chamber, thus obviating the need for a longitudinal bore and further oil inlet ducts in the connecting rod for feeding the oil. This not only dispenses with the production outlay for these oil feeding devices, but avoids weakening the connecting rod by making the longitudinal bore in it. The connecting rod can be of a lighter construction without reducing the fatigue strength. In the event of a cracked connecting rod, complex operations for disassembly and assembly of the connecting rod bearing cap are avoided. The heated cooling oil emerging from the annular cooling chamber is subsequently used in a specifically directed manner for lubricating the small connecting-rod eye before it drips into the oil reservoir of the internal combustion engine, the oil feed bore being acted upon without exerting any pressure. The quantity of oil for the lubrication is provided without additional equipment by the cooling-oil injection nozzle of the piston. The gap depth of the lubricating-oil pockets, which decreases towards the maximum-load point of the connecting rod, causes a hydrodynamic oil cushion to be built up and prevents breakdown of the oil film. In addition, the lubricating-oil pockets provide space for the piston pin which becomes flattened under high pressure.
The lubricating-oil pockets are preferably provided on both sides of a longitudinal axis of the connecting rod and symmetrically relative to the transverse axis of the connecting-rod eye over areas of in each case about 100' in the wall of the 3 receiving bore and therefore lie outside the main load areas of the connecting-rod eye and thus in areas of the connecting-rod eye which are hardly subjected to any stress in terms of forces. They are dimensioned to be sufficiently large for good lubrication of the connecting-rod eye, without the bearing surface of the piston pin being inadmissibly small in the main load areas.
The coating of the wall of the receiving bore by sputtering in the main load areas located between the lubricating-oil pocket areas constitutes a further possibility and has the advantage that the wall material of the receiving bore becomes more resistant to wear in the main load areas, and an additional connecting-rod bush between the wall of the receiving bore and the piston pin can thus be dispensed with.
Further refinements and advantages of the invention emerge from the following description, in which an embodiment is explained more precisely with reference to the drawing which shows a section through a piston 1 of an internal combustion engine (not illustrated in detail), which is mounted by means of a piston pin 2 in a receiving bore 3 of a small connecting-rod eye 4 of a connecting rod 5, which is only partially shown.
The piston 1 has at least one cooling chamber 7 arranged in the piston head 6 and having at least one inlet bore 8, via which cooling oil is injected into the cooling chamber 7 by a cooling-oil injection nozzle 9 for cooling the piston 1. The cooling-oil injection nozzle 9 is connected to the lubricating-oil circuit of the internal combustion engine (not illustrated). The cooling oil injected into the annular cooling chamber 7 extending circularly in the piston head 6 is distributed inside the chamber and absorbs heat from the piston 1. The heated cooling oil is conducted away out of the cooling chamber 7 through at least one outlet bore 10 to the interior of the piston 1.
Apart from two radially extending oil feed bores 12, 13 arranged above a transverse axis 11 of the connecting-rod eye 4, the connecting-rod eye 4 is configured as a self-contained bearing housing 14. The oil feed bores 12, 13 may be arranged in the connecting-rod eye 4 either symmetrically or asymmetrically in relation to a longitudinal axis 15 of the connecting rod and are each provided with a collecting funnel 16, 17 to collect lubricating oil emerging from the cooling chamber 7 and splashing off the piston head 6. In this case, the outlet bore 10 is disposed obliquely 4 relative to a longitudinal axis 15 of the connecting rod and is aligned with the connecting-rod eye 4 in such a way that the jet of cooling oil emerging from the outlet bore 10 impacts on the top part 14a of the bearing housing. The oil feed bores 12, 13 are likewise disposed obliquely upwards in relation to the longitudinal axis 15 of the connecting rod, so that a large proportion of the cooling oil emerging from the cooling chamber 7 or the cooling oil splashing off the piston head 6 can be received by the collecting funnels 16, 17. In the region of the bottom dead centre and top dead centre, the outlet bore 10 is congruent with the oil feed bore 12, so that the oil emerging from the outlet bore 10 passes directly into the oil feed bore 12.
The oil feed bores 12, 13 of the connecting-rod eye 4 open into lubricating-oil pockets 18, 19 in the wall 20 of the receiving bore 3 of the connectingrod eye 4. The cooling oil passes as lubricant without pressure from the outlet bore 10 of the annular cooling chamber 7 and, after splashing off the piston head 6, via the oil feed bore 12 into the lubricating-oil pocket 18 of the connecting-rod eye 4. The excess oil flowing back from the inlet bore 8 during the injection of the cooling oil into the cooling chamber 7 passes via the oil feed bore 13 into the lubricating-oil pocket 19 of the connecting-rod eye 4. The lubricating oil builds up in the lubricating-oil pockets 18, 19 to form a hydrodynamic oil cushion. The lubricating-oil pockets 18, 19 are provided on both sides of the longitudinal axis 15 of the connecting rod and symmetrically relative to a transverse axis 11 of the connecting-rod eye 4 over areas 21 of in each case about 1000 in the wall 20 of the receiving bore 3, so that they are not located in the main load areas 22 of the connecting-rod eye 4. In this case, the lubricating-oil pockets 18, 19 form oil reservoir compartments, from which lubricating oil can be fed continuously to the main load areas 22 of the connecting-rod eye 4 in the relief phases of the connecting rod 5. The lubricating-oil pockets 18, 19 have a gap depth t which decreases towards the connecting rod 5, as a result of which they are capable of retaining lubricating oil which has flowed in and of introducing it into a gap between the piston pin 2 and the wall 20 of the receiving bore 3, which gap arises in the main load areas 22 in an unstressed state of the connecting rod 5. By means of the alternating stressing and relieving of the connecting rod 5, a pumping effect occurs, which ensures efficient lubrication of the connecting-rod eye 4. The lubricating-oil pockets 18, 19 not only serve to lubricate the small connecting-rod eye 4, but also provide space for the piston pin 2 which becomes flattened under high pressure in the direction of the transverse axis 11.
To reduce wear, the wall 20 of the receiving bore 3 can be coated by sputtering in the main load areas 22 located between the lubricating-oil pocket areas 2 1. The lubricating-oil pockets 18, 19 can be produced with almost any desired contour using the cost-effective broaching operation. The lubricating-oil pockets 18, 19 can likewise be made in a connectingrod bush which is inserted in the receiving bore 3 of the connecting-rod eye 4.
6
Claims (6)
1. An arrangement for lubricating a small connecting-rod eye of a connecting rod of reciprocating piston internal combustion engines with cooling oil which is conveyed from the lubricating-oil circuit of the internal combustion engine into a receiving bore of the connecting-rod eye and into an annular cooling chamber, extending circularly in the piston head, of a piston mounted in the receiving bore of the small connecting-rod eye, the annular cooling chamber having at least one inlet bore and at least one outlet bore, and at least one radially extending oil feed bore being provided in the connecting-rod eye, which oil feed bore is connected to lubricating-oil pockets in the form of recesses in the wall of the receiving bore, wherein, apart from the two oil feed bores arranged above a transverse axis of the connecting- rod eye, the connecting-rod eye is configured as a self-contained bearing housing, and the lubri cating-oil pockets have a gap depth which decreases towards the connecting rod and are adapted to be acted upon by cooling oil emerging as lubricant without pressure from the outlet bore of the annular cooling chamber.
2. An arrangement for lubricating a small connecting-rod eye according to Claim 1, wherein the lubricating-oil pockets are in a connecting-rod bush which is inserted in the receiving bore of the connecting-rod eye.
3. An arrangement for lubricating a small connecting-rod eye according to Claim 1 or 2, wherein the lubricating-oil pockets are provided on both sides of a longitudinal axis of the connecting rod and symmetrically relative to the transverse axis of the connecting-rod eye over areas of in each case about 100' in the wall of the receiving bore.
4. An arrangement for lubricating a small connecting-rod eye according to any one of Claims 1 to 3, wherein the wall of the receiving bore is coated by sputtering in the main load areas located between the lubricating-oil pocket areas.
7 5. An arrangement for lubricating a small connecting-rod eye of a connecting rod of reciprocating piston internal combustion engines, substantially as described herein with reference to, and as illustrated in, the accompanying drawings.
Amendments to the claims have been filed as fokms 8 Claims 1. An assembly for lubricating a small connecting-rod eye of a connecting rod of reciprocating piston internal combustion engines with cooling oil which is conveyed from the lubricating-oil circuit of the internal combustion engine into a receiving bore of the small connecting-rod eye by way of an annular cooling chamber which extends circularly in the piston head of a piston, said piston being mounted by means of the receiving bore of the small connecting-rod eye, the annular cooling chamber having at least one inlet bore and at least one outlet bore, and at least one radially extending oil feed bore leads to the receiving bore of the small connecting-rod eye, which oil feed bore is connected to lubricating-oil pockets in the form of recesses in the wall of the receiving bore, wherein, apart from the at least one oil feed bore being arranged above a transverse axis of the small connecting-rod eye, the small connecting-rod eye is configured as a self-contained bearing housing, and the lubri cating-oil pockets have a gap depth which decreases towards the connecting rod and are adapted to be acted upon by cooling oil emerging as lubricant without pressure from the outlet bore of the annular cooling chamber.
2. An assembly for lubricating a small connecting-rod eye according to Claim 1, wherein two oil feed bores are connected to the lubricating-oil pockets.
3. An assembly for lubricating a small connecting-rod eye according to Claim 1 or claim 2, wherein the lubricating-oil pockets are in a connecting-rod bush which is inserted in the receiving bore of the small connecting-rod eye.
4. An assembly for lubricating a small connecting-rod eye according to any preceding claim, wherein the lubricating-oil pockets are provided on both sides of a longitudinal axis of the connecting rod and symmetrically relative to the transverse axis of the connecting-rod eye over areas of in each case about 1000 in the wall of the receiving bore.
5.
An assembly for lubricating a small connecting-rod eye according to any Cl preceding claim, wherein the wall of the receiving bore is coated by sputtering in the main load areas located between the lubricating-oil pocket areas.
6. An assembly for lubricating a small connecting-rod eye of a connecting rod of reciprocating piston internal combustion engines, substantially as described herein with reference to, and as illustrated in, the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19647735A DE19647735C1 (en) | 1996-11-19 | 1996-11-19 | Device for lubricating small end of connecting rod of internal combustion engine |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9724394D0 GB9724394D0 (en) | 1998-01-14 |
| GB2319582A true GB2319582A (en) | 1998-05-27 |
| GB2319582B GB2319582B (en) | 1998-10-28 |
Family
ID=7812065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9724394A Expired - Fee Related GB2319582B (en) | 1996-11-19 | 1997-11-18 | Assembly for lubricating a small connecting-rod eye |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE19647735C1 (en) |
| FR (1) | FR2756007B1 (en) |
| GB (1) | GB2319582B (en) |
| IT (1) | IT1296128B1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8245687B2 (en) | 2010-01-07 | 2012-08-21 | Mahle International Gmbh | Profiled connecting rod bore with micro-dimples |
| US8424445B2 (en) | 2009-06-02 | 2013-04-23 | Mahle International Gmbh | Connecting rod bore |
| US8613137B2 (en) | 2004-11-16 | 2013-12-24 | Mahle International Gmbh | Connecting rod lubrication recess |
| WO2016104171A1 (en) * | 2014-12-24 | 2016-06-30 | 三菱自動車工業株式会社 | Connecting rod and lubrication structure therefor |
| US9920787B2 (en) | 2015-03-05 | 2018-03-20 | Dr. Ing. H.C.F. Porsche Aktiengesellschaft | Connecting rod and internal combustion engine |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6250275B1 (en) * | 1999-08-16 | 2001-06-26 | Caterpillar Inc. | Internal combustion engine piston pin lubrication |
| DE10230746B4 (en) * | 2002-07-09 | 2015-10-01 | Ks Kolbenschmidt Gmbh | piston |
| US6745742B2 (en) * | 2002-10-07 | 2004-06-08 | Siegfried Meyer | Connecting rod structure |
| US20070074695A1 (en) * | 2005-10-04 | 2007-04-05 | Mahle Technology, Inc. | Piston having improved cooling characteristics |
| DE102013113333A1 (en) * | 2013-12-02 | 2015-06-03 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Connecting rod of a reciprocating internal combustion engine and piston connecting rod assembly of a reciprocating internal combustion engine |
| DE102015103201A1 (en) * | 2015-03-05 | 2016-09-08 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Connecting rod and internal combustion engine |
| DE102016218171A1 (en) | 2016-09-21 | 2018-03-22 | Mtu Friedrichshafen Gmbh | Engine of an internal combustion engine, internal combustion engine and method for lubricating a piston and Pleuelbolzenlagerung during operation of the engine |
| DE202020100567U1 (en) | 2020-02-03 | 2020-04-15 | Mahle International Gmbh | Connecting rod and connecting rod-piston arrangement |
| CN114251152B (en) * | 2020-09-22 | 2022-12-20 | 马勒汽车技术（中国）有限公司 | Lubrication mechanism for pin joint pair of internal combustion engine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB617224A (en) * | 1946-08-21 | 1949-02-02 | Harry Ralph Ricardo | Improvements in or relating to pistons |
| GB1479175A (en) * | 1973-09-28 | 1977-07-06 | Maschf Augsburg Nuernberg Ag | Multipart piston assembly for internal-combustion engines |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1013129B (en) | 1954-10-07 | 1957-08-01 | Kloeckner Humboldt Deutz Ag | Piston pin bearings in connecting rods |
| DE1745863U (en) * | 1957-03-25 | 1957-05-29 | Heinkel Ag Ernst | ARRANGEMENT FOR LUBRICATING A CONNECTING ROD BEARING. |
| DE1576354A1 (en) * | 1967-03-11 | 1970-04-16 | Daimler Benz Ag | Base bearing of an internal combustion engine |
| FR1536056A (en) * | 1967-09-07 | 1968-08-09 | Daimler Benz Ag | Lubrication of piston pins |
| DE1576387C3 (en) * | 1967-11-22 | 1978-04-20 | Kloeckner-Humboldt-Deutz Ag, 5000 Koeln | Splash oil lubrication of the piston pin bearing in the connecting rod eye of a connecting rod for reciprocating engines and machines |
| DE2539470C2 (en) * | 1975-09-05 | 1984-09-20 | Daimler-Benz Ag, 7000 Stuttgart | Liquid-cooled piston for an internal combustion engine |
| JPS5776312A (en) * | 1980-10-28 | 1982-05-13 | Sanshin Ind Co Ltd | Cap for greater end of connecting rod in two stroke cycle internal combustion engine |
| DE3603106C1 (en) * | 1986-02-01 | 1987-05-07 | Opel Adam Ag | Connecting rod |
| DE4135237A1 (en) * | 1991-10-25 | 1993-04-29 | Mak Maschinenbau Krupp | Piston and connecting rod for IC-engine - facilitates transfer of oil from duct in connecting rod to cooling chamber in piston |
-
1996
- 1996-11-19 DE DE19647735A patent/DE19647735C1/en not_active Expired - Fee Related
-
1997
- 1997-11-17 IT IT97RM000708A patent/IT1296128B1/en active IP Right Grant
- 1997-11-18 FR FR9714423A patent/FR2756007B1/en not_active Expired - Fee Related
- 1997-11-18 GB GB9724394A patent/GB2319582B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB617224A (en) * | 1946-08-21 | 1949-02-02 | Harry Ralph Ricardo | Improvements in or relating to pistons |
| GB1479175A (en) * | 1973-09-28 | 1977-07-06 | Maschf Augsburg Nuernberg Ag | Multipart piston assembly for internal-combustion engines |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8613137B2 (en) | 2004-11-16 | 2013-12-24 | Mahle International Gmbh | Connecting rod lubrication recess |
| US8424445B2 (en) | 2009-06-02 | 2013-04-23 | Mahle International Gmbh | Connecting rod bore |
| US8245687B2 (en) | 2010-01-07 | 2012-08-21 | Mahle International Gmbh | Profiled connecting rod bore with micro-dimples |
| WO2016104171A1 (en) * | 2014-12-24 | 2016-06-30 | 三菱自動車工業株式会社 | Connecting rod and lubrication structure therefor |
| JP2016121702A (en) * | 2014-12-24 | 2016-07-07 | 三菱自動車工業株式会社 | Connecting rod and lubrication structure of the same |
| US9920787B2 (en) | 2015-03-05 | 2018-03-20 | Dr. Ing. H.C.F. Porsche Aktiengesellschaft | Connecting rod and internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19647735C1 (en) | 1998-02-12 |
| IT1296128B1 (en) | 1999-06-09 |
| ITRM970708A1 (en) | 1999-05-17 |
| FR2756007A1 (en) | 1998-05-22 |
| FR2756007B1 (en) | 1999-12-24 |
| GB9724394D0 (en) | 1998-01-14 |
| GB2319582B (en) | 1998-10-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |