EP2841738A1 - Dispositif d'obturation d'un alesage realise dans le bloc-cylindres ou la culasse d'un moteur a combustion interne - Google Patents
Dispositif d'obturation d'un alesage realise dans le bloc-cylindres ou la culasse d'un moteur a combustion interneInfo
- Publication number
- EP2841738A1 EP2841738A1 EP13719929.5A EP13719929A EP2841738A1 EP 2841738 A1 EP2841738 A1 EP 2841738A1 EP 13719929 A EP13719929 A EP 13719929A EP 2841738 A1 EP2841738 A1 EP 2841738A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bore
- skirt
- shutter device
- lid
- chamber
- 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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/005—Plugs
Definitions
- the present invention relates to a device for closing a bore made in the cylinder block or the cylinder head of an internal combustion engine, this bore communicating with the oil circuit of this engine.
- This closure device comprises in itself known manner a cap which is force-fitted into the bore mentioned above.
- This seal comprises a bottom and a side skirt which is in elastic contact with the cylindrical side face of the bore.
- the object of the present invention is to create a shutter device to remove the leaks above.
- This object is achieved, according to the invention, with a device for closing a bore made in the cylinder block or the cylinder head of an internal combustion engine, this bore communicating with the oil circuit of this motor, this device comprising a cover comprising a bottom and a side skirt which is in contact with the cylindrical side face of the bore, characterized in that the bore comprises an annular chamber which partially surrounds the lateral skirt of the lid.
- This annular chamber reduces the contact area between the skirt of the lid and the bore and therefore to reduce the risk of seizing when fitting the cap in the bore.
- This chamber also allows to create, at the boundary between the side face of the bore and the annular chamber, an annular zone in which the skirt bears with a very high pressure on the lateral face of the bore, which provides a very strong connection between these two parts and thus an excellent seal between them.
- said annular chamber is at least partially filled with glue.
- the radial depth of said chamber may be between 0.5 and 1, 5 tenth of a mm.
- the peripheral edge of the skirt of the lid, opposite the bottom thereof, is oriented towards the inlet of the bore.
- said annular chamber is limited by an annular shoulder of the side face of the bore surrounding the skirt of the lid. Said annular shoulder therefore surrounds the skirt of the lid in a circle.
- This circle may be located at a distance from the peripheral edge of the skirt between quarter and half the height of the skirt.
- said chamber opens out by an annular slot between the side face of the annular chamber and the peripheral edge of the skirt of the operculum, opposite the bottom thereof.
- the skirt of the lid is frustoconical, the large base of the truncated cone being located at the peripheral edge of the skirt.
- the skirt of this cap is in contact with the lateral face of the bore in two circles centered on the axis of the bore located between the annular shoulder which limits said chamber and the bottom of the lid.
- the seal is preferably made of steel and the bore is preferably made in a cylinder block or a cylinder head of aluminum-based alloy and silicon.
- FIG. 1 is a view in axial section showing a cap in the closed position of a bore connected to the oil circuit of an internal combustion engine
- FIG. 2 is an enlarged view of the detail F of FIG. 1,
- Figures 3 to 5 are sectional views similar to Figure 1 showing three successive phases of mounting of the cap in the bore.
- Figure 1 shows, in axial section, a closure device of a bore 1 made in the cylinder block or the cylinder head of an internal combustion engine.
- the device comprises a cap 2 comprising a bottom 3 and a side skirt 4 which is in contact under high pressure with the cylindrical side face 1a of the bore 1.
- the bore 1 comprises, as shown in Figure 2, an annular chamber 5 which partially surrounds the lateral skirt 4 of the lid 2.
- This annular chamber 5 is preferably at least partially filled with glue to complete the seal between the lid 2 and the bore 1.
- the radial depth of the chamber 5 may be between 0.5 and 1, 5 tenth of a mm.
- peripheral edge 4a of the skirt 4 of the lid 2, opposite the bottom 3 thereof, is oriented towards the inlet 1b of the bore 1.
- annular chamber 5 is limited by an annular shoulder 6 of the side face 1a of the bore 1 surrounding the skirt 4 of the lid 2.
- This annular shoulder 6 surrounds the skirt 4 in a circle located at a distance from the peripheral edge 4a of the skirt 4 which may be between one quarter and one half of the height of the skirt 4.
- Figure 2 also shows that the chamber 5 opens out by an annular slot 7 between the side face of the bore 1 and the peripheral edge 4a of the skirt 4 of the lid, opposite the bottom 3 of it.
- skirt 4 of the cover 2 is slightly frustoconical, the large base of the truncated cone being located at the peripheral edge 4a of the skirt 4.
- the skirt 4 is in contact with the lateral face 1a of the bore 1 in two circles centered on the axis of the bore 1 located between the annular shoulder 6 which limits the chamber 5 and the bottom 3 of the skirt 4, as will be explained in more detail below.
- the seal 2 is preferably stamped steel.
- the bore 1 is preferably made in a cylinder block or an alloy cylinder based on aluminum and silicon.
- the skirt 4 Due to the widening of the bore 1 due to the annular chamber 5, the skirt 4 is not likely to seize in the bore and thus generate a risk of leakage.
- the cover 2 engages in the narrowed portion of the bore 1 located beyond the shoulder 6 which limits the annular chamber, the skirt 4, because of its conicity, deforms radially exerting a very high pressure on the side face 1a of the bore 1.
- This very high pressure is concentrated on two circular lines 11, 12 located on the skirt 4 respectively near the bottom 3 of this skirt and near the shoulder 6 of the annular chamber 5.
- the means of the invention namely the annular chamber, are simple and inexpensive to produce.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1253716A FR2989738B1 (fr) | 2012-04-23 | 2012-04-23 | Dispositif d'obturation d'un alesage realise dans le bloc-cylindres ou la culasse d'un moteur a combustion interne |
| PCT/FR2013/050645 WO2013160574A1 (fr) | 2012-04-23 | 2013-03-26 | Dispositif d'obturation d'un alesage realise dans le bloc-cylindres ou la culasse d'un moteur a combustion interne |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2841738A1 true EP2841738A1 (fr) | 2015-03-04 |
| EP2841738B1 EP2841738B1 (fr) | 2016-03-23 |
Family
ID=48237085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13719929.5A Active EP2841738B1 (fr) | 2012-04-23 | 2013-03-26 | Dispositif d'obturation d'un alesage realise dans le bloc-cylindres ou la culasse d'un moteur a combustion interne |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2841738B1 (fr) |
| ES (1) | ES2566654T3 (fr) |
| FR (1) | FR2989738B1 (fr) |
| WO (1) | WO2013160574A1 (fr) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3635369A (en) * | 1969-08-19 | 1972-01-18 | Tull C Lasswell | Precoated plug |
| GB2068093B (en) * | 1980-01-24 | 1983-08-17 | Potterton Int Ltd | Heat exchangers |
| US4930459A (en) * | 1989-07-21 | 1990-06-05 | Sdi Operating Partners, L.P. | Freeze plug |
-
2012
- 2012-04-23 FR FR1253716A patent/FR2989738B1/fr not_active Expired - Fee Related
-
2013
- 2013-03-26 WO PCT/FR2013/050645 patent/WO2013160574A1/fr not_active Ceased
- 2013-03-26 ES ES13719929.5T patent/ES2566654T3/es active Active
- 2013-03-26 EP EP13719929.5A patent/EP2841738B1/fr active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2013160574A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2989738A1 (fr) | 2013-10-25 |
| ES2566654T3 (es) | 2016-04-14 |
| FR2989738B1 (fr) | 2014-05-16 |
| WO2013160574A1 (fr) | 2013-10-31 |
| EP2841738B1 (fr) | 2016-03-23 |
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