EP1516136A1 - Kolbensegment für verbrennungs- und dieselmotor, diesen umfassender zylinder und motor - Google Patents
Kolbensegment für verbrennungs- und dieselmotor, diesen umfassender zylinder und motorInfo
- Publication number
- EP1516136A1 EP1516136A1 EP03761631A EP03761631A EP1516136A1 EP 1516136 A1 EP1516136 A1 EP 1516136A1 EP 03761631 A EP03761631 A EP 03761631A EP 03761631 A EP03761631 A EP 03761631A EP 1516136 A1 EP1516136 A1 EP 1516136A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- segment
- piston
- cylinder
- internal combustion
- compression ignition
- 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.)
- Withdrawn
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 15
- 230000006835 compression Effects 0.000 title claims abstract description 12
- 238000007906 compression Methods 0.000 title claims abstract description 12
- 238000005299 abrasion Methods 0.000 claims description 7
- 238000004939 coking Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 241000826860 Trapezium Species 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000004299 exfoliation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/12—Details
Definitions
- the present invention relates to a piston ring for an internal combustion engine and compression ignition, a cylinder equipped with a. such segment as well as an engine as mentioned above containing such a segment.
- the present invention relates more particularly to a segment for a diesel engine.
- Exfoliation is a characteristic phenomenon of internal combustion and compression ignition engines such as diesel engines.
- the term “exfoliation” refers to the locking segment by the scale inside the piston groove in which it is inserted.
- the scale comes from the coking of the heated oil and mixed with the combustion residues.
- the coking of the oil is generated by the flow of burnt gases bypassing the piston, this flow is also commonly called “blow by”.
- the segment which seals the combustion chamber, is an annular part housed in a groove formed in the wall of the piston.
- the segment is normally guided by an axial (vertical along the axis of the cylinder) and radial clearance in the cylinder. The “gumming” of the segment results in detachment from the barrel and loss of tightness of the combustion chamber.
- Another solution is to protect the groove containing the segment by a reduced clearance between the piston and the cylinder.
- Another solution is to increase the axial backlash against the groove in the piston and the segment.
- trapezium segments and l X trapezoids are relatively expensive and their use generates a flow of burnt gases bypassing the larger piston and an increase in oil consumption.
- the object of the present invention is to provide a segment for an internal combustion engine and compression ignition whose structure makes it possible to avoid its blocking in the groove of the piston in which it is housed.
- This object is achieved by means of a segment for the piston of an internal combustion engine and compression ignition which, typically according to the invention, includes abrasion means at its internal diameter.
- the scale is no longer prevented from entering the groove containing the piston, but the thickness of the layer of scale in formation by abrasion is eliminated or limited.
- the abrasion means are not limited. They can thus be reported or trained in the segment.
- the abrasion means comprise a helical thread.
- the rotation of the segment in its groove thus makes it possible to rub the layer of scale in formation and therefore to wear it thus limiting its thickness and avoiding the gumming of the segment.
- the pitch of the thread is, for example, between 0.04 mm and 0.6 mm
- the present invention also relates to a cylinder for an internal combustion engine and compression ignition comprising a piston contained in a cylinder, said piston being equipped with a segment according to the invention and an internal combustion engine and compression ignition comprising at least one cylinder comprising a piston fitted with a segment according to the invention.
- FIG. 1 shows a partial perspective view of the embodiment of the invention shown in Figure 1.
- the segment 1 of the invention comprises an upper flank 3, a lower flank 5, an internal diameter 7 and an external diameter 9 or bearing which comes, in FIG. 1, to bear against the surface internal link 11a of a cylinder 11.
- This segment 1 is housed in a groove 13a formed in the wall of a piston 13.
- the lower and upper sides 3 and 5 are, in section, parallel to each other and parallel to the walls 13b and 13c of the groove 13a.
- the inner diameter 7 comprises abrasion means 15 which, in the particular example shown, have the form of a helical thread 15a extending over the entire height h of the inner diameter 7.
- the pitch p of this thread 15a is of the order of 0.3 mm.
- the depth d of the thread is of the order of 0.3 mm.
- the net -15 a consists of a first portion 15b substantially parallel to the sides 3 and 5 and of a second portion 15c forming with the portion 15a an angle of approximately 60 °.
- the present invention is however not limited to this particular configuration.
- FIG. 2 shows in more detail the helical thread 15a.
- This thread 15a can be obtained by tapping a conventional segment with an ordinary tapping tool whose speed of rotation is adapted so as to obtain the desired pitch.
- the manufacturing cost of the segment of the invention is low compared to the manufacturing cost of a segment of the trapezoid or l ⁇ trapezoid type.
- Zone C represents the layer of scale.
- the segment 1 is brought into rotation in its groove 13a around the axis ZZ which is also the axis of symmetry of the piston 13.
- the friction of the thread 15a against the scale continuously starts the layer of scale C thus preventing it from forms a too thick layer which would block the segment 1 in the groove 13a.
- the helical shape makes it possible to erode a zone of scale each time different by the rotation of segment 1 and thus ensuring the homogeneity of the destruction of the scale layer.
- the scale residues formed by abrasion are then driven downwards, in the direction of arrow F, by the flow of burnt gases bypassing the piston.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0207933 | 2002-06-26 | ||
| FR0207933A FR2841600B1 (fr) | 2002-06-26 | 2002-06-26 | Segment pour piston de moteur a combustion interne et allumage par compression, cylindre et moteur contenant un tel segment |
| PCT/FR2003/001936 WO2004003408A1 (fr) | 2002-06-26 | 2003-06-24 | Segment pour piston de moteur a combustion interne et allumage par compression, cylindre et moteur contenant un tel segment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1516136A1 true EP1516136A1 (de) | 2005-03-23 |
Family
ID=29724898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03761631A Withdrawn EP1516136A1 (de) | 2002-06-26 | 2003-06-24 | Kolbensegment für verbrennungs- und dieselmotor, diesen umfassender zylinder und motor |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1516136A1 (de) |
| FR (1) | FR2841600B1 (de) |
| WO (1) | WO2004003408A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006028778A1 (de) * | 2006-06-23 | 2007-12-27 | Inficon Gmbh | Lecksuchgerät |
| CN108999717A (zh) * | 2018-08-15 | 2018-12-14 | 全椒县全动机械有限公司 | 一种柴油机活塞结构 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1375095A (en) * | 1921-04-19 | Piston-ring | ||
| US1499571A (en) * | 1920-11-11 | 1924-07-01 | Morris A Davis | Piston ring |
| DE3000146A1 (de) * | 1980-01-04 | 1981-07-09 | Mahle Gmbh, 7000 Stuttgart | Kompressionsring fuer kolben von verbrennungsmotoren |
-
2002
- 2002-06-26 FR FR0207933A patent/FR2841600B1/fr not_active Expired - Fee Related
-
2003
- 2003-06-24 WO PCT/FR2003/001936 patent/WO2004003408A1/fr not_active Ceased
- 2003-06-24 EP EP03761631A patent/EP1516136A1/de not_active Withdrawn
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2004003408A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2841600B1 (fr) | 2005-05-06 |
| WO2004003408A1 (fr) | 2004-01-08 |
| FR2841600A1 (fr) | 2004-01-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20041108 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR |
|
| RBV | Designated contracting states (corrected) |
Designated state(s): DE ES GB IT |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: STROJNY, DIDIER Inventor name: BALD, ARNAUD |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20081231 |