BG62500B1 - Device for the introduction of small quantities of oxides of rare earth metals, in particular of cerium oxide in the combustion chamber of an internal combustion engine - Google Patents

Abstract

The device includes one tank (2, 4) containing dried andair-conducting content (50) in the form of fibres and/or powderwith or of oxides of rare earth metals and connected by at leastone hole (20) to the atmosphere, and through one outlet (52), bymeans of an intake duct, to the fuel chamber of the internalcombustion engine. A tube (34) for the introduction of intake airto the content of the tank across filter (48) is also designedwhich is immersable in the content (50) of the tank, beingconnected through hole (20). Tube (34) is enveloped on itsexternal side of at least part of its length by a cylinder-likefilter (48). At least one connection of the flow (42) is providedin the device through the tube wall between the interior ofanother tube (36) and the cavity between the external tube wall(34) and filter (48), this cavity beeing sealed.10 claims, 4 figures

Description

Technical field

The invention relates to a device for introducing small amounts of rare earth oxides, in particular cerium oxide, into the combustion chamber of an internal combustion engine.

BACKGROUND OF THE INVENTION

Such a device is known from EP 485 551. It enables the addition of a small amount of a mixture of dry earth oxides in the dry state into the air inlet of an internal combustion engine at low installation and maintenance costs. Renewal of the contents of a reservoir of a mixture of rare earth oxides is mandatory only after a long run of an internal combustion engine, eg after 80000 km. By introducing a very small amount of rare earth oxides, hazardous harmful substances, in particular CO, CO ₂ , HC and NOx are reduced, and the fuel consumption is reduced so that the same result is obtained with the action of a regulating catalyst. at a significantly lower cost.

Technical nature

It is an object of the invention to provide a device which, in a simple and easy-to-maintain design, distributes the intake air very uniformly through the contents of the tank and thus does not allow the penetration of foreign substances (dust, moisture) contained in the suction air.

The problem is solved by a device of the type in the restrictive part of claim 1 with a pipe enclosed on its outer side by at least one part of its length by a cylindrical filter, providing at least one connection of the flow through the pipe wall between the inside of the tube and the space between the outside of the tube and the filter and this space is sealed.

One embodiment of the invention with a number of advantages is characterized in that the tube at its free end is closed, a flow connection is made from at least one transverse opening near the closed free end of the tube and one sealing ring 10, sealing between the outer The wall of the pipe and the inside of the filter is built in place between the transverse opening and the closed end of the pipe.

The sealing ring, which can preferably be made as an arbitrary 0-ring, has two functions. On the one hand, it seals the annular space between the cylindrical filter and the outer wall of the pipe so that the suction air that is sucked through the pipe can be introduced into the contents of the tank, passing exclusively through the filter. On the other hand, the sealing ring through a friction connection prevents the cylindrical filter from leaking out of the pipe.

According to another embodiment of the invention, the space between the outside of the tube and the inside of the filter is enlarged by longitudinal channels in the outer tube 30 through which the intake air in the space is distributed uniformly along the length and range of the tube filter and so can quickly reach all areas of the 35 available filter surface. This improves the distribution of the intake air in the contents of the tank.

According to another embodiment of the invention, the air intake section has 40 one air intake housing, and inside the housing there is a bell, the outside of which forms with the housing a bell whose outer side forms a collecting space with the housing. for humidity and contaminants contained in the exhaust air. Between the opening of the bell and the open end of the pipe on the side of the stream there is an inlet filter, whereby the bell connects to the collecting space through another upwardly displaced air intake port. Prior to the intake air entering the pipe, a first filtration is achieved to prevent moisture and contaminants from entering the pipe.

For maintenance, in particular for the subsequent filling of the tank after a longer run, e.g. 80000 km per vehicle equipped with an internal combustion engine has the advantage of one embodiment of the invention, wherein the end of the flow side pipe is secured by a flap comprising the air intake portion of the housing and the flap is sealed. , respectively disassembled, e.g. by screwing, with one main body containing at least part of the contents of the tank. In the subsequent filling, this main body is unscrewed, filled and screwed again with the lid.

Description of the attached figures

The invention is better explained by the following figures, of which:

Figure 1 shows a perspective view of a device according to the invention obliquely from above;

2 is a vertical sectional view through the device of FIG. 1;

Figure 3 is a section along line III-III of Figure 2;

FIG. 4 is a perspective oblique view of a main body of the device according to FIGS. 1 and 2.

Example of implementation

The device includes one tank with lid 2 and one, in the form of a pot, main body 4 for receiving the dry content 50 of the dust tank of rare earth metals or fibers, which are screwed with thread 6. One seal provides gas-tight insulation of the interior of the tank relative to the outside environment. An anchor bracket 10 enables the tank to be anchored to an unspecified fixed position in the engine compartment of an unspecified motor vehicle.

Cover 2 has a generally designated air inlet section 12. This air intake section is provided on its upper side with a female thread 14 indentation, in which a corresponding housing 16 has a screw housing 16 which is sealed by a 0 ring 18. The housing 16 has two coaxial, one-on-one lines. , air intake opening 20. Inside the housing 16 there is a bell 22, which is flush over the housing through the flange not shown in the drawings, 12 being lowered to one location of the air intake section 12. The lower opening of the bell 22 is pointing to a central aperture 13 of the air intake section ha 12 and is therefore separated by a sieve on the inlet filter 15. An 0-ring 18 is pressed below that sieve on the inlet filter 15 by an unmarked enclosing the opening of the bell, a flange of the bell 22 at one, respectively unmarked, location of the section for air intake 12 through the lower face of the housing 16.

The bell 22 has at its upper narrow end an opening 24 which is connected to the inner space of the casing 16. The inner space in its lower region, between the outer wall of the bell and the inner wall of the casing, forms a collecting space 26 for moisture and dust entering the casing. housing through the openings 20 air. By displacing the height of the openings 20 and the opening 24, the flow of the suction air entering through the opening 20 swirls and deflects upward to the opening 24 of the bell 22 so that the dust particles entrained by the airflow and the droplets contained in the air collect in the assembly space 26 without being transported inwardly into the opening 24 of the bell 22.

The lower end of the opening 13 of the air inlet section 12 is narrowed to form a section to which, through the 0 ring 28, the head of an inlet nozzle 30 is fitted with the nozzle neck 32. The inlet nozzle 30 is screwed with the upper conical end of a pipe. 34, which with its cavity 36 is aligned with the opening 13 of the air intake section 12 and extends to one closed lower end 38 of the pipe 34.

Immediately above its lower end 38, the tube 34 has an annular groove 40. In this annular groove, the cross-shaped transverse openings 42 terminate below 90 °, thereby connecting the cavity 36 of the tube 34 to its outer side. Below the annular groove 40, the tube 34 is enclosed by an 0-ring 44 which is housed in a narrower annular groove. Figure 3 shows that there are further provided longitudinal ducts 46, in the exemplary embodiment shown, eight, which serve to distribute the flowing air from the inside through the transverse openings 42 and the annular duct 40 with suction air along the pipe 34. These longitudinal ducts 46 terminate above the 0-ring 44. A filter in the form of a metal sieve 50 is pushed through the pipe 34, with a mesh distribution of 80 mesh over the entire length of the pipe, so that it touches the lower end of the air inlet section 12 and is maintained below. and is sealed by the friction connection of the 0-ring 44. In this way, the suction air exiting through the lower annular groove 40 is formed in the space between the outer region of the tube 34 and the inner wall of the metal sieve 48 and is quickly and uniformly distributed and can only pass through the filter sieve 48 out into the contents 50 of the dust tank of rare earth oxides or such fibers. This ensures that the contents are blown evenly 50.

Through the outer wall of the lid 2 is passed a valve 52, which through the thread 54 is tightly screwed into the wall of the lid 2 and sealed through the 0-ring 56. In the area of this screw assembly is provided a throttle 58. The valve 52, whose opening 60 is connected to the suction line not shown in the drawing to the combustion chamber of the internal combustion engine, is protected during transportation by an elastomeric lid 62.

Application of the invention

During operation, the enriched particulate matter of rare earth metal oxide through the exhaust and the suction line is sucked into the combustion chamber of the internal combustion engine due to the fact that there is a reduced pressure (partial vacuum) in the suction phase.

The two views described below provide information on the selection of the contents of the tank 50 used in the invention.

1. The particle size of a rare earth metal oxide material is between 0.25 mm / 60 mesh - ie. pass through a sieve with dimensions of 60 mesh and 0.5 meshes, with one recommended size being 0.048 mm (300 mesh).

2. It is generally understood that the compounds used must contain as much Seg / CeO / as can be easily and economically efficiently achieved, and this naturally depends on the practical difficulties involved in the separation of the various rare earth oxides. .

The weight fraction of Seg content in the mixture ranges from 30%, practically to 100%. Below the description are three examples of recommended compounds.

Further analysis provides weight compositions of three examples of recommended mixtures that can be used as contents 50 of the tank according to the invention.

Composition 1 Cerium oxide 45.0% Lanthanum oxide 22,5% Neodymium oxide 17.9% Prezodine oxide 5.7% Thorium oxide 0.25% Sulphate as SO 1.5% Other Oxides / YO, ScO) 2.9% Phosphate as PO 0,8% Limestone and magnesium oxide 1.0% Composition 2 Cerium oxide 90.0% Lanthanum oxide 2.0% Neodymium oxide 1.3% Prezodine oxide 0.4% Other rare earth oxides 1.0% metals Thorium oxide 0.25% Iron and aluminum oxide 0.25% Limestone and magnesium oxide 4.0% Silica 0.05% Phosphate 0.5% Sulphate 0.5% Composition 3 Cerium oxide 45,6% Lanthanum oxide 22,8% Neodymium oxide 16.2% Prezodine oxide 4.7% Other rare earth oxides metals 5.7% Thorium oxide 0.2% Iron and aluminum oxide 1.0%

Limestone and magnesium oxide 0.2% Silica 0.1% Phosphate 0.5% Sulphate 1-2,0% Loss of ignition 0-1,0%

Claims

Claims (10)

1. A device for introducing small amounts of rare earth oxides, especially cerium oxide, into the combustion chamber of an internal combustion engine, wherein a tank / 2,4 containing, containing air-permeable content / 50 / in the form of fibers and / or dust with or from rare earth oxides, is connected through at least one opening (20) to the atmosphere and through one exhaust 1521 with a suction line to the combustion chamber of an internal combustion engine, providing one submersible in the contents / 50 / of the tank and connecting with is through the opening (20), pipe (34) for introducing sucked air into the contents of the tank through a filter (48), characterized in that the pipe (34) is enclosed on its outside by at least a portion of its length by a cylindrical filter (48), at least one connection of the flow (42) is provided through the pipe wall between the inside of the pipe (36) and the space between the outside of the pipe (34) and the filter (48), and this space is sealed , A device according to claim 1, characterized in that the tube (34) is closed from its free end (38), the flow connection being realized from at least one transverse opening (42) near the closed free end (2). 38 / of the pipe and one sealing ring / 44 /, sealing between the outside of the pipe / 34 / and the inside of the filter / 48 / is incorporated in one place between the transverse opening / 42 / and the closed free end (38) of the pipe. Apparatus according to claim 1 or 2, characterized in that the space between the outer side of the tube (34) and the filter (48) comprises longitudinal grooves (46) in the outer wall of the tube (34) for uniform distribution along the length and circumference of the cylindrical filter / 48 / of the air supplied through the transverse opening / 42 / into the space. Device according to one of Claims 1 to 3, characterized in that an inlet nozzle (30) is installed at the end of the pipe (34) on the suction side. Device according to one of Claims 1 to 4, characterized in that the end of the pipe (34) on the side of the stream is fixed in a lid (2) of the tank, covering one section for air intake (12). A device according to claim 5, characterized in that the air intake section (12) has a housing (16) with air intake openings (20), with a bell (16) inside the housing (16). 22 /, the outside of which forms with the housing / 16 / a collecting space / 26 / for moisture and contaminants contained in the suction air and that the bell / 22 / connects to the collecting space / 26 / through one another, moved upwards to the openings for air intake / 20 /, aperture / 24 /. Device according to claim 6, characterized in that there is an inlet filter (15) between the opening of the bell (22) and the open end of the pipe (34) on the side of the stream. Apparatus according to claims 5,6 and 7, characterized in that the tube (34) is vertically disposed in the tank (2,4), immersed in the free end (38) near the deepest part of the tank. Device according to one of Claims 5 to 8, characterized in that the lid (2) is connected by a gas seal, respectively disassembled to one main body (4), which contains at least part of the contents (50) of the tank . Device according to one of Claims 1 to 9, characterized in that the filter (48) is a wire mesh sieve with a mesh width of preferably 80 mesh.