FR3069027A1 - FUEL PROTECTION SCREEN FOR HIGH ENGINE - Google Patents

Abstract

The invention relates to an arrangement (200) for an internal combustion engine (2) comprising a protection (20) of the fuel supply rail and an oil decanter (10) at least partially capped by the protection (20). ) of the fuel supply rail, characterized in that the arrangement (200) comprises a screen (100) extending at a junction between the fuel rail protection (20) and the oil settling tank (10) to mask an orifice (O) between the fuel rail protection (20) and the oil settling tank (10).

Description

Fuel protection screen for high engine

The invention relates to an arrangement for an internal combustion engine comprising a protection for the fuel supply rail and an oil decanter. The invention also relates to an internal combustion engine comprising such an arrangement. Finally, the invention relates to a motor vehicle comprising such an internal combustion engine or such an arrangement.

An internal combustion engine equipping for example a motor vehicle comprises parts intended for the fuel supply. These parts, for example injectors, high pressure and low pressure pipes and a fuel supply manifold, are generally placed on the high engine, on a crankcase. Such parts obviously contain fuel.

Generally, these parts are covered by a protection of the fuel supply ramp which comes to bear on the crankcase and an oil decanter, for example an oil decanter provided with an upper element and an element inferior. Such a configuration then creates an enclosure for the parts mentioned above containing fuel. This enclosure must avoid any risk of fuel, for example diesel, being sprayed onto the components outside the high engine.

Only, even by interposing a foam seal between a rib of the oil decanter and a groove in the protection of the fuel supply manifold, holes remain. Indeed, the foam gasket does not seal over the entire length of the interface between these two assembled parts, or even three parts in the case of an oil decanter comprising a lower element and an upper element. Indeed, an oil decanter is generally composed of two parts, a lower element and an upper element assembled by a plastic weld, in particular for producing and integrating internal components of the oil decanter. Such an assembly generally requires a welded assembly sidewalk (parting line) starting from the bottom to the top of the oil decanter.

Figure 1 partially illustrates such a high engine configuration of an internal combustion engine according to the prior art. Due to its complex shape or geometry, the oil decanter is manufactured in two parts, a lower element 11 ’and an upper element 13’. An opening O 'extends between these two elements, for example over a height of the order of 14 mm. FIG. 2 illustrates a protection 20 ′ of the fuel supply ramp coming to cover both the lower element 11 ’and the upper element 13 ′ of the oil decanter. Despite the presence of the foam gasket (not shown) as explained above, part of the O 'hole remains. In fact, only about 40% of the height of port O ’is covered by the foam seal.

Thus, this configuration does not prevent any fuel splashing towards the outside of the enclosure formed by the assembly of the protection of the fuel supply ramp and the oil decanter, in particular facing the zones say hot such as the exhaust. Such fuel splashes are dangerous since they can have serious consequences, such as a fire.

Such a configuration leaving an open area at a junction between the protection of the fuel supply manifold and the oil decanter is not acceptable.

The object of the invention is to provide a solution overcoming the above drawbacks and improving the arrangements of a high internal combustion engine engine known from the prior art. In particular, the invention provides a simple and economical arrangement of an oil decanter associated with a protection of the fuel supply rail eliminating any possibility of splashing fuel, in particular on the exhaust side.

To achieve this objective, the invention relates to an arrangement for an internal combustion engine comprising a protection of the fuel supply ramp and an oil decanter covered at least partially by the protection of the fuel supply ramp, the arrangement comprising a screen extending at a junction between the protection of the fuel supply ramp and the oil decanter in order to mask an orifice between the protection of the fuel supply ramp and the oil decanter.

The oil decanter may include an upper element and a lower element.

The screen can comprise several parts, in particular several parts overlapping at least partially one on the other.

The screen can include:

a first part extending from the lower element of the oil decanter in the direction of the protection of the fuel supply ramp, and

- a second part extending from the protection of the fuel supply ramp in the direction of the lower element of the oil decanter.

The screen may include a third part extending from the upper element of the oil decanter towards the first part of the screen and / or towards the second part of the screen.

At least one space may remain between the first part and the second part, and / or between the first part and the third part, and / or between the second part and the third part.

The first part of the screen may have come from the material of the lower element of the oil separator, and / or the second part of the screen may have come from the material of the protection of the fuel supply rail, and / or the third part of the screen may have come from the upper element of the oil separator.

The invention also relates to an internal combustion engine comprising an arrangement as defined above.

Finally, the invention relates to a motor vehicle comprising an internal combustion engine as defined above and / or an arrangement as defined above.

These objects, characteristics and advantages of the present invention will be explained in detail in the following description of an embodiment of an arrangement for an internal combustion engine comprising a protection of the fuel supply manifold and an oil decanter made without limitation in relation to the attached figures among which:

FIG. 1 represents a partial front view of a configuration of a high engine according to the prior art.

FIG. 2 represents a sectional view of a detail, along a plane A, of the configuration of the high engine according to the prior art.

FIG. 3 represents a schematic view of a motor vehicle according to an embodiment of the invention.

FIG. 4 represents a partial perspective view of an arrangement according to an embodiment of the invention.

FIG. 5 represents a perspective view of the arrangement according to the embodiment of the invention.

FIG. 6 represents another perspective view of the arrangement according to the embodiment of the invention.

Figure 7 shows a partial top view of the arrangement according to the embodiment of the invention.

Figure 8 shows a sectional view along a plane C of the arrangement according to the embodiment of the invention.

FIG. 9 represents another sectional view along a plane B of the arrangement according to the embodiment of the invention.

Figure 10 shows another sectional view along plane B of the arrangement according to the embodiment of the invention.

Figure 11 shows a sectional view along a plane D of the arrangement according to the embodiment of the invention.

A motor vehicle 1 according to an embodiment of the invention is illustrated in FIG. 3. The motor vehicle 1 comprises an internal combustion engine 2 according to an embodiment of the invention. The internal combustion engine 2 includes an arrangement 200 according to an embodiment of the invention.

As illustrated in FIGS. 4 to 11, the arrangement 200 notably comprises a protection 20 for the fuel supply manifold and an oil decanter 10. This oil decanter 10 is covered, at least partially, by the protection 20 of the fuel supply rail. As mentioned above, the oil decanter 10 generally comprises an upper element 13 and a lower element

11.

According to one embodiment of the invention, the arrangement 200 comprises a protection 20 of the fuel supply ramp, an oil decanter 10 and a screen 100 extending at a junction between the protection 20 of the fuel supply rail and the oil decanter 10. The purpose of this screen 100 is to partially or completely mask an orifice O between the protection 20 of the fuel supply rail and the oil decanter 10 Hiding the orifice O aims to stop any projection so that none can leave the enclosure in the form of a jet, or even leave the enclosure delimited by the protection 20 of the fuel supply ramp associated with the oil decanter. 10.

According to variants not illustrated, the screen 100 comprises a single part extending either:

- from the lower element 11 in the direction of the protection 20 of the fuel supply ramp and / or in the direction of the upper element 13,

- from the upper element 13 in the direction of the lower element 11 and / or in the direction of the protection 20 of the fuel supply ramp,

- From the protection 20 of the fuel supply ramp in the direction of the lower element 11 and / or of the upper element 13.

Ί

Indeed, depending on the geometry of the parts and the position of the orifice O, the screen 100 can be connected to other parts of the lower element 11 or of the upper element 13 or of the protection 20 of the ramp. fuel supply.

Preferably, the screen 100 comprises several parts, for example several parts overlapping at least partially on each other once the protection 20 of the fuel supply manifold and the oil decanter 10 assembled. Indeed, the interest of the screen 100 is to prevent fuel splashes from reaching the orifice O, or even passing through it. Thus, during the assembly of the lower element 11, of the upper element 13 and of the protection 20 of the fuel supply rail, one or more overlaps of the parts of the screen 100 prevent access from projections to the orifice O. To do this, the screen 100 is advantageously arranged so that it intercepts any straight line which can be positioned in the passage formed by the orifice O.

Thus, the screen 100 may for example comprise a first part 111 extending from the lower element 11 of the oil decanter 10 in the direction of the protection 20 of the fuel supply ramp. The screen 100 then comprises a second part 120 extending from the protection 20 of the fuel supply ramp in the direction of the lower element 11 of the oil decanter 10.

More preferably, the screen 100 comprises a third part 113 extending from the upper element 13 of the oil decanter 10 in the direction of the first part 111 of the screen 100 and / or in the direction of the second part 120 of screen 100.

FIGS. 6 and 7 illustrate more particularly spaces E remaining between the first part 111 and the second part 120, and / or between the first part 111 and the third part 113, and / or between the second part 120 and the third part 113 Such spaces E constitute games which facilitate the assembly of the parts. Sealing is not sought after the screen 100 is in place. In other words, the assembly of the protection 20 of the fuel supply ramp on the oil decanter 10 and, optionally the cap casing, does not generate a sealed enclosure. Thus, the assembly of the screen 100 with the protection 20 of the fuel supply ramp guarantees the masking of the orifice O of the enclosure outlet towards the outside and in particular above the exhaust face. The enclosure is not waterproof a fortiori and the orifice is necessary for the assembly of the oil decanter. A seal is in place in the upper part but cannot close the O port in its entirety. There is therefore a need to mask this orifice O.

Preferably, the first part 111 of the screen 100 has come from the lower element 11 of the oil decanter 10. The second part 120 of the screen 100 may also have come from the material of the protection 20 of the fuel supply rail. The third part 113 of the screen 100 may also have come from the upper element 13 of the oil decanter 10.

The screen 100 can alternatively form an independent part.

Figures 5, 9 and 11 illustrate in particular the first part 111 preferably comprising a notch 112 intended for the passage of an edge 21 of the protection 20 of the fuel supply manifold.

Figures 7 and 10 illustrate in particular the first part 111 associated with the lower element 11 creating a chute 12 by junction or vis-à-vis a surface 14 on the upper element 13. This chute 12 preferably extends up to the orifice O. Thus, the chute 12, and possibly the orifice O, have a width equal, or substantially equal, to the value of the space E.

Note that the first part 111 extends from a first end 111 'distant, or substantially distant, from a space E of the third part 113, to a second end 111 ”coming at the level, or substantially at the level, of the orifice O. FIG. 7 illustrates in particular the space E between the first end 111 'of the first part 111 and the third part 113.

Note that the second part 120 may include a first clearance 121 for the passage of the upper element 13. Thus, the space E also extends between this first clearance 121 and the third part 113, as illustrated in FIG. 6 A second clearance 122 can also be provided on the second part 120.

Finally, the third part 113, for example of the protuberance type of parallelepiped shape, or substantially parallelepiped shape, extends from the surface 14 of the upper element 13. This third part 113 extends opposite, or substantially opposite, the entry of the chute 12 if we consider its exit at the orifice O. Although a space E separates the third part 113 from the first end 111 'from the first part 111, the third part 113 prevents fuel splashes to access the chute 12.

Preferably, the first part 111 and / or the second part 120 have curved shapes.

Thus, the screen 100 comprising the first part 111, the second part 120 and the third part 113 prevents any projection of fuel from accessing the orifice O. The screen 100 creates real baffles stopping the propagation of the fuel projections .

In a variant not shown, the third part 113 may have a curved shape, the first part 111 and / or the second part 120 may not then have a curved shape.

As a note, the solution therefore achieves the desired object of providing a high engine equipped with an oil decanter comprising a lower element and an upper element assembled with a protection of the fuel supply rail preventing any projection of fuel. In particular, it relates to a screen preventing any projection towards an orifice disposed between the upper element, the lower element and the protection of the fuel supply manifold, near the exhaust.

In addition, the solution has the following advantages:

- It improves security.

- The additions of the first part 111 and / or the second part 120 and / or the third part 113 requiring little additional material, they have a low impact in terms of costs.

The invention can be applied to petrol or diesel engines.

In summary, the arrangement 200 comprising a screen 100 is particularly well suited to a motor vehicle 1 needing to improve the safety linked to fuel splashes in the high engine.

Claims (9)

claims 1. Arrangement (200) for an internal combustion engine (2) comprising a protection (20) of the fuel supply manifold and an oil decanter (10) covered at least partially by the protection (20) of the manifold supply system, characterized in that the arrangement (200) comprises a screen (100) extending at a junction between the protection (20) of the fuel supply ramp and the decanter of oil (10) in order to mask an orifice (O) between the protection (20) of the fuel supply manifold and the oil decanter (10). 2. Arrangement (200) according to claim 1, characterized in that the oil decanter (10) comprises an upper element (13) and a lower element (11). 3. Arrangement (200) according to one of the preceding claims, characterized in that the screen (100) comprises several parts (111, 120, 113), in particular several parts (111, 120, 113) overlapping at least partially on top of each other. 4. Arrangement (200) according to claims 2 and 3, characterized in that the screen (100) comprises: a first part (111) extending from the lower element (11) of the oil decanter (10) in the direction of the protection (20) of the fuel supply ramp, and - A second part (120) extending from the protection (20) of the fuel supply ramp in the direction of the lower element (11) of the oil decanter (10). 5. Arrangement (200) according to the preceding claim, characterized in that the screen (100) comprises a third part (113) extending from the upper element (13) of the oil decanter (10) in the direction of the first part (111) of the screen (100) and / or in the direction of the second part (120) of the screen (100). 6. Arrangement (200) according to claim 5, characterized in that at least one space (E) remains between the first part (111) and the second part (120), and / or between the first part (111) and the third part (113), and / or between the second part (120) and the third part (113). 7. Arrangement (200) according to one of claims 5 or 6, characterized in that the first part (111) of the screen (100) came from the lower element (11) of the oil separator (10), and / or the second part (120) of the screen (100) came from the material of the protection (20) of the fuel supply ramp, and / or the third part (113) of the 'screen (100) is made of the upper element (13) of the oil separator (10). 8. Internal combustion engine (2), characterized in that it comprises an arrangement (200) according to one of the preceding claims. 9. Motor vehicle (1), characterized in that it comprises an internal combustion engine (2) according to claim 8 and / or an arrangement (200) according to one of claims 1 to 7.