DE202007003941U1 - Body made of a sound absorbing material - Google Patents

Abstract

body (1) for mounting in an internal combustion engine containing Engine or engine room and / or in an air intake system of an internal combustion engine, the body (1) being made of sound-absorbing sounds consists of damping material, characterized in that the body (1) on its surface and / or in its interior at least one hydrocarbon adsorbing Adsorbent (11).

Description

The The present invention relates to a body for assembly in an engine or engine room containing an internal combustion engine and / or in an air intake system of an internal combustion engine, wherein the Body of a sound-absorbing, noises dampening material.

Internal combustion engines cause a considerable noise level during operation, due to legal requirements and due to comfort requirements from Z. B. motor vehicle users to a predetermined or acceptable Measure must be damped. For this it is general known to use sound-absorbing materials, for example be installed in the engine compartment and in the interior of motor vehicles, to the noise emission by airborne and structure-borne noise out into the environment as well as into a passenger compartment to reduce an associated motor vehicle.

One source of operating noise from an internal combustion engine is its air intake system. In this area is from the DE 10 2005 044 169 A1 an air filter housing with a filter cartridge and with a damping plate known. The damping plate is spaced from a wall of the air cleaner housing and has a plurality of through openings. In this case, the damping plate is a relatively thin plate made of a generally rigid material, such as plastic or metal. In addition to this damping plate can be arranged between this and the adjacent housing wall, a sound-absorbing material, which is preferably a foam.

With The aforementioned means can airborne sound and structure-borne noise in the environment of internal combustion engines, in particular motor vehicles, be reduced to a desired level.

simultaneously arises in internal combustion engines, in particular in motor vehicles, the problem, a release of hydrocarbons into the environment to avoid at standstill of the internal combustion engine. An exit Hydrocarbons take place at standstill of an internal combustion engine in particular by the air intake system, in which case the gaseous Hydrocarbons against the direction of air intake through the intake tract flow and through an air filter, which with the connected to the surrounding area. To this harmful leakage of hydrocarbons into the environment To avoid it is known hydrocarbons adsorbing materials to be arranged at a suitable place.

The DE 10 2005 016 393 A1 shows an air filter system for internal combustion engines, with an air filter housing followed by clean air line. In the housing and / or in the clean air line, a throughflow in the main stream and / or flows through in the secondary flow and / or an overflow or flow around adsorber element for hydrocarbons is provided. Here are folded, wabenförmi ge or even surface adsorber elements in the form of nonwovens, paper or PTFE insert.

The DE 101 63 922 A1 shows an air intake of an internal combustion engine, wherein in the device within the space through which a hydrocarbon adsorbing material is provided, which contacts a flowing through the device flow medium. The adsorbent material may be at least partially formed as an inner wall panel of the air intake. As the adsorbing material, a plate-shaped, tick-shaped folded active carbon-containing nonwoven is used concretely here.

With the funds according to the last two Although writings can escape from hydrocarbons from a Internal combustion engine can be reduced or prevented in the environment however, the hydrocarbons used here have adsorbing properties Materials no sound-absorbing function or effect. Therefore, you need to connect to an internal combustion engine or Components or always independent in a machine or engine room from one another on the one hand means of noise reduction and on the other hand means for preventing the escape of hydrocarbons be provided in the area, each for their own Means must be manufactured and installed. this leads to apparent to a high production and assembly costs, what with correspondingly high costs.

For The present invention sets itself the task of a body of the type mentioned above, in addition to a noise damping function takes on additional functions, in particular for reduction or avoiding leakage of hydrocarbons from one Internal combustion engine contributes to the environment. The solution This object succeeds according to the invention with a Body of the type mentioned, characterized is that he is on his surface and / or inside him at least one adsorbent adsorbing hydrocarbons having.

Of the inventive body combines advantageous two functions with each other, namely a noise damping function and an adsorption function for hydrocarbons, so that a single body combines two functions, for which up to now different means had to be provided. This reduces the manufacturing and assembly costs. Furthermore will total for the fulfillment of the two functions less space is needed, which in the often confined spaces, For example, in the engine compartment of a motor vehicle, an important Advantage is.

In order to the body has its function in terms of adsorption of Hydrocarbons as reliable as possible, in particular as long as possible and without maintenance can, is preferably further provided that in the installed state of the body at the and / or in the body Adsorbent at standstill of the associated internal combustion engine are adsorbed by this emitted hydrocarbons and that during operation of the internal combustion engine by means of wind, ventilation and / or combustion air intake of moving fresh air, the adsorbent can be regenerated on and / or in the body. Becomes advantageous achieved in this embodiment that without special measures the adsorbent is regenerated regularly. The regeneration takes place by means of fresh air, which is the body swept with the previously adsorbed hydrocarbons or flows through, the delivery of the first adsorbed hydrocarbons in such a dilution that no more harmful effects occur. When the engine is turned off, the adsorbent is ready for the adsorption of at standstill of the internal combustion engine, especially shortly after their shutdown, leaving hydrocarbons. A special maintenance associated with time and effort, is not required.

Prefers the body consists of a foam plastic, because a Foam plastic on the one hand good noise damping properties and on the other hand has a large surface, which is advantageous for the adsorption function. Furthermore can be a body of foam plastic in virtually any Molds are either preformed or placed during installation, which facilitates the accommodation.

Further it is envisaged that the adsorbent in powder and / or granular form adhered to the surface of the body is. For example, in this embodiment conventional noise damping body used in addition to their surface be provided with the adsorbent.

Prefers becomes the adsorbent by means of an adhesive on the surface the body attached to a secure hold of the adsorbent even in the operation of an internal combustion engine or a so equipped motor vehicle vibrations occur to ensure.

alternative can the adsorbent in powder and / or granular form in the the body forming material needs to be. To this Way, can a larger volume of the adsorbent in the body, causing the adsorption capacity is increased.

Around can integrate the adsorbent into the body the adsorbent before foaming the body in a starting material used for foaming the body be mixed.

expedient is further provided that the foam plastic porous is, so that the adsorbed hydrocarbons in the Inside the body or flow through it can and thereby come into contact with the adsorbent.

alternative can the adsorbent after a foaming of the body be used in existing in the body pores. The introduction can be done here, for example, by mechanical incorporation, wherein then the adsorbent after incorporation within the pores the body is trapped. Through the open-mouthedness and the elasticity of the foam forming the body The adsorbent can be introduced into the interior of the body be and then kept in the body without z. B. an adhesive must be used. If necessary can also be Adhesive used to fix the adsorbent. At the same time, the porosity ensures that the hydrocarbons make the body with low flow resistance flow through and come into contact with the adsorbent can.

One preferred adsorbent is activated carbon, since this good adsorption properties has and is a low-priced material.

Further, it is preferably provided that the foam plastic is a soft foam. As a flexible foam, the foamed plastic has particularly good noise-damping properties. Except This allows the body to be well adapted to parts of an internal combustion engine or of a motor or engine room that are carrying it, without requiring a great deal of effort.

One for the intended use well suited foam plastic is polyurethane (PUR).

In In a simple execution, the body has the Form of insulation and adsorption mat or plate. In this form, the body can work well on surfaces an internal combustion engine or components of the internal combustion engine or flat on surfaces of an engine or engine room be attached.

alternative The body may be preformed in its manufacture and / or be formable molded body when mounted. In this embodiment, the body can be special predetermined contours of its mounting locations are adjusted.

In order to the body effectively fulfills the functions intended for it, it is envisaged that in the installed state at least one the engine facing surface of the engine or Engine room is mounted so that it comes from the engine or engine room flowing through gases and / or flowed through is. The arrangement is thus chosen so that the hydrocarbons, which are to be adsorbed on their technically prescribed or natural flow path inevitably overflow or flow through the body have to.

A cheap concrete arrangement is that the body attached to the underside of a hood of a motor vehicle is. At this point, the body acts both as an adsorber for exiting from the internal combustion engine, due to their Temperature rising hydrocarbons as well as Noise attenuation element on the usually relatively large and thus easy to vibrate Engine Hood.

additionally or alternatively to the previously stated arrangement, the Body in a housing of a component the internal combustion engine forming air filter and / or Ansauggeräuschdämpfers and / or in an air filter housing and / or the intake silencer attached to the internal combustion engine air intake tract so attached Be it from the air cleaner housing and / or the intake silencer and / or the air intake tract flowing through gases and flowing air over and / or through-flow is. In this arrangement, an adsorption of the hydrocarbons takes place already within the air intake system of the internal combustion engine, so that escape into the ambient air avoided from the outset becomes.

Around Being able to renew the body when needed is he preferred in the housing of the air filter or Ansauggeräuschdämpfers or detachably mounted and replaceable in the air intake tract.

Farther The present invention relates to an internal combustion engine with a Air intake system. For the internal combustion engine is provided according to the invention, that in the air intake system at least one body of the above arranged type is arranged.

After all The invention also relates to a motor vehicle with an engine compartment and an internal combustion engine disposed therein. For the Motor vehicle is provided according to the invention, that at the internal combustion engine and / or in the engine compartment at least a body of the type described above is arranged.

in the Below is an embodiment of the invention based explained a drawing. The only figure of the drawing shows a schematic cross-section of one on the hood a motor vehicle mounted body.

According to the drawing figure, the body has 1 made of a porous plastic foam 10 exists, the shape of a flat mat or plate. By means of an adhesive layer 12 is the body 1 with its top at the bottom of a hood 2 attached.

On its underside, that of an internal combustion engine, not shown here, in a through the hood 2 covered engine compartment is facing, is a layer of adsorbent 11 attached, for example, glued. The layer of the adsorbent 11 on the free surface of the body 1 ensures adsorption of hydrocarbons, according to the flow arrows 13 from the internal combustion engine in their off state ascend and the body 1 overflow. On the flow path, the hydrocarbons get in contact with the adsorbent 11 and are going through this adsorbed as long as the internal combustion engine is switched off.

During operation of the internal combustion engine is fresh air through the adsorbent by wind or ventilation or Verbrennungsluftansaugung 11 led, whereby the adsorbent 11 is regenerated. In this regeneration, the adsorbed hydrocarbons are removed in a significant dilution, so that they pose no hazard. The next time you turn off the engine is the adsorbent 11 then again for the adsorption of at standstill of the engine from these exiting hydrocarbons available. LIST OF REFERENCE NUMBERS character description 1 body 10 Plastic foam 11 adsorbent 12 adhesive 13 flow arrows 2 Engine Hood

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• DE 102005044169 A1 [0003]
• DE 102005016393 A1 [0006]
• - DE 10163922 A1 [0007]

Claims (20)

Body ( 1 ) for mounting in an engine or engine room containing an internal combustion engine and / or in an air intake system of an internal combustion engine, wherein the body ( 1 ) consists of a sound-absorbing, noise-damping material, characterized in that the body ( 1 ) at its surface and / or in its interior at least one adsorbent adsorbing hydrocarbons ( 11 ) having. Body according to claim 1, characterized in that in the installed state of the body ( 1 ) on and / or in the body ( 1 ) Adsorbents ( 11 ) are adsorbed at standstill of the associated internal combustion engine from this released hydrocarbons and that during operation of the internal combustion engine by means of moving air, ventilation and / or combustion air intake fresh air moving the adsorbent ( 11 ) on and / or in the body ( 1 ) is regenerable. Body according to claim 1 or 2, characterized in that it consists of a foam plastic ( 10 ) consists. Body according to claim 1, 2 or 3, characterized in that the adsorbent ( 11 ) in powder and / or granular form on the surface of the body ( 1 ) is attached. Body according to claim 4, characterized in that the adsorbent ( 11 ) by means of an adhesive on the surface of the body ( 1 ) is attached. Body according to claim 1, 2 or 3, characterized in that the adsorbent ( 11 ) in powder and / or granular form into which the body ( 1 ) forming material is introduced. Body according to claims 3 and 6, characterized in that the adsorbent ( 11 ) before foaming of the body ( 1 ) in a for foaming the body ( 1 ) used starting material is mixed. Body according to one of claims 3 to 7, characterized in that the foam plastic ( 10 ) is porous. Body according to claims 3, 6 and 8, characterized in that the adsorbent ( 11 ) after a foaming of the body ( 1 ) in the body ( 1 ) existing pores is introduced. Body according to one of the preceding claims, characterized in that the adsorbent ( 11 ) Activated carbon is. Body according to one of claims 3 to 10, characterized in that the foam plastic ( 10 ) is a soft foam. Body according to one of claims 3 to 11, characterized in that the foam plastic ( 10 ) consists of polyurethane (PUR). Body according to one of the claims 1 to 12, characterized in that it takes the form of a Dämm- and Adsorption mat or plate has. Body according to one of the claims 1 to 12, characterized in that it is preformed during its manufacture and / or is moldable molded body when mounted. Body according to one of the preceding claims, characterized in that it in the installed state at least one of the engine facing surface of the engine or engine room is mounted so that it from the engine or Engine room flowing gases overflow and / or flowed through is. Body according to claim 15, characterized in that it is attached to the underside of a bonnet ( 2 ) of a motor vehicle is mounted. Body according to one of claims 1 to 14, characterized in that it is housed in a housing of a a component of the internal combustion engine forming air filter and / or Ansauggeräuschdämpfers and / or in a the air filter housing and / or the Ansauggeräuschdämpfer with the internal combustion engine connecting air intake tract is mounted so that it by the air filter housing and / or the Ansauggeräuschdämpfer and / or the air intake tract gases flowing through and flowing Air can be overflowed and / or flowed through. Body according to claim 17, characterized that it is in the housing of the air filter or intake silencer or detachably mounted and replaceable in the air intake tract is. Internal combustion engine with an air intake system, characterized in that in the air intake system at least one body ( 1 ) is arranged according to one of claims 1 to 18. Motor vehicle with an engine compartment and an internal combustion engine arranged therein, characterized in that on the internal combustion engine and / or in the engine compartment at least one body ( 1 ) is arranged according to one of claims 1 to 18.