• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to an oil pan for an internal combustion engine. The oil pan (1) comprises a housing (4a-f) which they have an internal space for receiving oil and a sound-absorbing insert (6) which is adapted to be applied in contact with an internal wall surface of the housing (4a-f) in an area where oil flows into the oil pan (1) from the internal combustion engine. The sound-absorbing insert (6) comprises a material body with open pores so that oil flowing down into the oil pan (1) in said area passes through the sound-absorbing insert (6) before it accumulates on a bottom surface in the interior space. The sound-absorbing insert (6) dampens vibrations in the housing (4a-t) and the resulting sound from the oil pan in an effective way the pores are filled with oil, (Fig. 1)
    公开号:SE1150097A1
    申请号:SE1150097
    申请日:2011-02-09
    公开日:2012-08-10
    发明作者:Bengt Neiglick
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    SUMMARY OF THE INVENTION The object of the present invention is to provide an oil pan for an internal combustion engine with a sound-absorbing construction which in a simple and effective manner counteracts the occurrence of vibrations in the walls of the oil pan and thus the disturbing sounds which such vibrations give rise to. .
    This seam is achieved with the oil tray device of the type mentioned in the introduction, which is characterized by the features stated in the characterizing part of claim 1. The sound-absorbing insert is thus applied in contact with an internal wall surface in the oil pan in an area where oil flows down into the oil pan from the internal combustion engine. The sound-absorbing insert comprises a material body with open pores. Open pores refer to cavities that have orifices in the outer surfaces of the material body. The open pores also form pathways of fate for the oil so that it can flow down through the sound-absorbing insert. The oil from the internal combustion engine which reaches an upper end surface of the sound-absorbing insert is led into the sound-absorbing insert via the mouths of the pores in the upper end surface. The oil flows downwards inside the sound-absorbing insert through the pathways of fate formed by the pores.
    The oil is led downwards by means of gravity. When the oil has flowed through the sound-absorbing insert, it is led out of it via the mouths of the pores in a lower end surface of the sound-absorbing insert. By choosing a sound-absorbing insert with open pores that is of a suitable size, internal ban pathways can be created where the oil flows downwards in the sound-absorbing insert at a predetermined relatively low speed. The oil is advantageously given a speed so that the pores of the sound-absorbing insert are substantially always completely filled with oil during operation of the internal combustion engine. Thus, the oil together with the sound-absorbing insert forms a mass which abuts against one or more of the inner wall surfaces of the oil pan. The sound-absorbing insert and the enclosed oil create a sound-absorbing zone in connection with at least one of the walls of the oil pan, which effectively counteracts the formation of vibrations in the walls and thus the disturbing sound normally emitted from the oil pan during operation of the internal combustion engine. In this case, the oil abuts to a greater extent in contact with the walls of the oil pan than in a conventional oil pan. This results in a more efficient heat exchange between the oil in the oil pan and the surrounding air and an improved cooling of the oil in the oil pan.
    According to an embodiment of the present invention, the sound-absorbing insert is relatively rigid and has a contact surface which has a corresponding shape as the area 10 of the inner wall surface where it is applied. A rigid sound-absorbing insert that has a corresponding shape as an interior wall surface constitutes a very stable support for the wall.
    The sound-absorbing insert thus counteracts the wall from vibrating in a very effective way. However, it is possible to use sound-absorbing inserts with open pores of ibexable materials. Preferably, the sound-absorbing insert has contact surfaces with all internal wall surfaces of the oil pan where vibrations normally occur. The sound-absorbing insert can be arranged in an area of the oil trough where the inner wall surface has a substantially vertical extension. It is in particular the vertical side walls of the oil pan that vibrate during operation. The bottom surface of the oil pan is normally covered with oil which forms a mass which prevents vibrations from occurring in the horizontal bottom part of the oil pan.
    According to a preferred embodiment of the present invention, the sound-absorbing insert is attached to the inner wall surface by means of an adhesive. The sound-absorbing insert can, for example, be glued to the inner wall surface. Thus, the sound-absorbing insert obtains a substantially continuous fixed contact surface with the inner wall surface. As a result, relative movements between the sound-absorbing insert and the wall surface are prevented, which in a very effective manner prevents vibrations from occurring in the wall. Alternatively, the insert may comprise other types of fasteners such as rivets or screws that secure the sound-absorbing insert in a predetermined mounting position within the oil pan. According to a further alternative, the sound-absorbing insert can have an external shape that is completely adapted to the inner surface of the oil pan, both vertically, longitudinally and transversely. In this case, the sound-absorbing insert can be lowered into the oil pan and held in a mounting position by means of gravity requirements. The sound-absorbing insert consists advantageously of a unit that is applied in the oil pan in the form of a continuous piece. However, it is possible that the sound-absorbing insert consists of fl your parts that are applied in different positions in the oil pan. According to a preferred embodiment of the present invention, the sound-absorbing insert has an upper end surface which is located at substantially the same level as an upper end surface of the oil pan. Thus, the sound-absorbing insert can provide a damping of vibrations in the walls of the oil pan all the way up to the fastening position of the oil pan in the internal combustion engine. The sound-absorbing insert may have a lower end surface which is located at a lower or the same level as a normal oil level in the oil pan during operation of the internal combustion engine. The oil in the oil pan dampens vibrations at the bottom of the oil pan and a bit up along the side walls of the oil pan. By giving the sound-absorbing insert a stretch 10 15 20 25 30 35 down to the oil level i, the vertical side walls of the oil pan can be given an effective vibration damping.
    According to a preferred embodiment of the present invention, the sound-absorbing insert consists of a metal foam. Metal foams are rigid materials that can be made with open pores of varying sizes. Metal foam can also be given a desired, substantially arbitrary shape in a relatively simple manner. Metal foams are light and stiff. They also have a high energy absorbing ability. Arranging a sound-absorbing insert of a metal foam in the oil pan thus adds a very small weight to the oil pan. The rigidity of the metal foam means that the sound-absorbing insert forms a very stable internal support for the walls of the oil pan. The energy-absorbing properties of the metal foam mean that the sound-absorbing insert reduces vibrations in a very effective way. Advantageously, the volume of the metal foam can consist of open pores to 75-95%. The majority of the metal foam thus consists of open pores, which makes the sound-absorbing insert very light. The sound-absorbing insert can thus also receive a large amount of oil. Advantageously, the metal foam contains aluminum or alumina. Aluminum foam is a material that has rigid properties while being extremely light. It also has a good ability to absorb large amounts of energy. A sound-absorbing insert in the form of an aluminum foam thus has very suitable properties for eliminating vibrations in an oil pan.
    According to a preferred embodiment of the present invention, the sound-absorbing insert has a thickness which exceeds the thickness of the wall structure in the oil pan. Thus, the sound-absorbing insert occupies a relatively large volume that can mainly be filled with oil. The sound-absorbing insert thus provides very good internal support for the walls of the oil pan and a mass that effectively counteracts the occurrence of vibrations in the walls. The sound-absorbing insert can have a thickness of at least 5 mm. Advantageously, the sound-absorbing insert has a thickness of at least 10 mm.
    BRIEF DESCRIPTION OF THE DRAWINGS In the following, as an example, a preferred embodiment of the invention is described with reference to the accompanying drawing, in which: Fig. 1 shows an oil pan with a sound-absorbing insert according to the present invention and Fig. 2 shows a cross-sectional view of the sound-absorbing insert in the oil pan in Fig. 1 when attached to an internal combustion engine.
    DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION Fig. 1 shows an oil pan 1 for an internal combustion engine. The oil pan 1 comprises an upper end surface 2 with a number of holes 3 for fastening the oil pan to a lower part of an engine block of the internal combustion engine by means of bolts or the like. The oil pan 1 consists of a housing 4a-f which forms a bowl-shaped space for receiving and storing oil from the internal combustion engine. The oil pan 1 is advantageously made in one piece from a suitable metal material such as, for example, aluminum or a plastic material. The housing 4a-f comprises a bottom portion 4a having a substantially horizontal extension in the mounted state of the oil pan, the bottom portion 4a being surrounded by a first short side wall 4b, a second short side wall 4c, a first long side wall 4d and a second long side wall 4e. The side walls 4b, d-e are inclined substantially vertically upwards from the bottom portion 4a to the upper edge portion 2 of the oil pan.
    However, the second short side wall 4c merges, at an upper portion, into a raised wall portion 4f which has a substantially horizontal extension. A pipeline (not shown) extends into the space for sucking up oil from the bottom portion 4a of the oil pan, by means of an oil pump (not shown). The absorbed oil is transported through oil channels to the places where the internal combustion engine is to be lubricated. The used oil then flows back from the internal combustion engine to the oil pan 1.
    A problem with conventional oil trays 1 is that during operation of the internal combustion engine vibrations arise in particular in the vertical side walls 4b-e of the oil pan. Such vibrations result in the creation of a loud disturbing sound. The bottom portion 4a is more spared from vibrations as these are usually damped by the oil accumulated on the bottom of the oil pan 1. To counteract the occurrence of vibrations in the vertical side walls 4b-e of the oil pan, a sound-absorbing insert 6 has been applied in contact with the inner surfaces of the side walls 4b. . The sound-absorbing insert 6 comprises a rigid body of material with open pores.
    The open pores have orifices in the outer surfaces of the sound-absorbing insert. The open pores form fl fate channels for the oil so that it can flow through the sound-absorbing insert 6. The sound-absorbing insert 6 can be mounted in the oil pan 1 only by lowering it into the oil pan 1 to a designated mounting position as it has a corresponding contact surface as the side walls. 4b-e interior surfaces. Alternatively, the sound-absorbing insert 6 can be glued to the internal surfaces 4b-e of the vertical walls of the oil pan in the mounting position. The sound-absorbing insert 6 is advantageously made of a metal foam. The metal foam can be an aluminum foam consisting of aluminum or alumina with open pores. The pores advantageously make up the largest part of the aluminum foam. The pores can advantageously constitute 75-95% of the volume of the sound-absorbing insert 6. This makes the sound-absorbing insert 6 extremely light. The sound-absorbing insert 6 therefore adds substantially no weight to the oil pan 1. The pores are adapted to be filled with oil during operation. As the damping insert 6 mainly consists of pores, it does not substantially reduce the capacity of the oil pan 1 to receive and store oil.
    Fig. 2 shows the oil pan 1 in an assembled condition. The upper end surface 2 of the oil pan is here attached to a lower part 7 of the engine block of the internal combustion engine. The sound-absorbing insert 6 has an upper end surface 6a which in the mounted state is located at substantially the same level as the upper end surface 2 of the oil pan. The sound-absorbing insert 6 has a lower end surface 6b which is located at a lower or the same level as the oil level 8 in the oil pan during normal operation of the internal combustion engine 7. During operation of the internal combustion engine 7, the oil used for lubrication of various parts of the internal combustion engine splashes around and sticks largely to the inner wall surfaces of the engine block. The oil flows mainly downwards along the inner wall surfaces of the engine block and down into the oil trough 1 via the inner vertical walls 4a-e of the oil trough. Pilarna i F ig. 2 shows how the oil normally flows into the oil pan 1 from the internal combustion engine 7. The oil which reaches the oil pan 1 initially hits the upper end surface 6a of the sound-absorbing insert. The upper end surface 6a contains orifices for pores extending through the sound-absorbing insert 6. The oil flows down into the pores at the upper end surface 6a of the sound-absorbing insert 6. The oil then continues to flow downwards through the pores of the sound-absorbing insert 6 by means of the gravity claw . The pores of the sound-absorbing insert 6 form fl fate paths for the oil which are dimensioned so that the oil obtains a relatively low speed as it flows downwards through the sound-absorbing insert 6. The oil eventually leaves the sound-absorbing insert 6 via pores which open at the lower end surface 6b. The lower end surface 6b is located at a lower or the same level as a normal oil level 8 in the oil pan during operation of the internal combustion engine.
    The open pores of the sound-absorbing insert 6 have a size and structure which means that the oil is slowed down when it reaches the sound-absorbing insert 6. Since the oil here has a lower speed than before it reaches the sound-absorbing insert 6, it can fill essentially all pores in the sound-absorbing insert 6 even if the sound-absorbing insert 6 occupies a relatively large volume. The sound-absorbing insert 6 has at least a thickness which exceeds the thickness of the wall structure 4a-e in the oil trough 1. The sound-absorbing insert 10 has a thickness so that it can receive a relatively large amount of oil. The thickness of the sound-absorbing insert 6 should exceed 5 mm and preferably be at least 10 mm. A sound-absorbing insert 6 of a metal foam such as an aluminum foam has very good sound-absorbing properties. In addition, when its pores are filled with oil, a relatively large mass is created which abuts against the vertical walls 4b-e. The sound-absorbing insert 6 thus counteracts vibration movements in the vertical walls 4a-f of the oil pan in a very effective manner. Another positive effect with the sound-absorbing insert 6 is that the oil which abuts in contact with the vertical wall surfaces 4b-e of the oil pan provides a good cooling of the surrounding lu fi.
    The invention is in no way limited to the embodiment described in the drawing but can be varied freely within the scope of the claims. The sound-absorbing insert 6 may alternatively consist of fl your separate parts which are fastened to the inner vertical wall surfaces 4b-e of the oil pan 1 in areas where oil flows down into the oil pan. The sound-absorbing insert 6 may consist of materials other than metal foams which have open pores for receiving oil.
    权利要求:
    Claims (10)
    [1]
    An oil pan for an internal combustion engine, the oil pan (1) comprising a housing (4a-f) defining an interior space for receiving oil and a sound-absorbing insert (6) adapted to be applied in contact with an interior wall surface of the housing (4a-f) in an area where oil flows into the oil trough (1) from the internal combustion engine, characterized in that the sound-absorbing insert (6) comprises a body of material with open pores so that oil flowing into the oil trough (1) in said area passes through the sound-absorbing insert (6) before it accumulates on a bottom surface in the interior space.
    [2]
    Oil pan according to claim 1, characterized in that the sound-absorbing insert (6) is rigid and that it has a contact surface which has a corresponding shape as the area of the inner wall surface where it is applied.
    [3]
    Oil pan according to claim 1 or 2, characterized in that the sound-absorbing insert (6) is arranged in contact with an internal wall surface (4b-e) which has a substantially vertical extension when the oil pan (1) is in a mounted condition under an internal combustion engine ( 7).
    [4]
    Oil pan according to one of the preceding claims, characterized in that the sound-absorbing insert (6) is fastened to the inner wall surface by means of a fastening means (10).
    [5]
    Oil pan according to one of the preceding claims, characterized in that the sound-absorbing insert (6) has an upper end surface (6a) which is located at substantially the same level as an upper end surface (2) of the oil pan (1).
    [6]
    Oil pan according to one of the preceding claims, characterized in that the sound-absorbing insert (6) has a lower end surface (6b) which is located at a lower or the same level as a normal oil level (8) in the oil pan (1) during operation of the internal combustion engine. (7).
    [7]
    Oil pan according to one of the preceding claims, characterized in that the volume of the sound-absorbing insert consists of 75-95% open pores.
    [8]
    Oil pan according to one of the preceding claims, characterized in that the sound-absorbing insert (6) consists of a metal foam.
    [9]
    Oil pan according to Claim 8, characterized in that the metal foam contains aluminum or alumina.
    [10]
    Oil pan according to one of the preceding claims, characterized in that the sound-absorbing insert (6) has a thickness which exceeds the thickness of the casing in the oil pan (1),
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    同族专利:
    公开号 | 公开日
    SE535449C2|2012-08-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2021-09-28| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1150097A|SE535449C2|2011-02-09|2011-02-09|Oil trough for an internal combustion engine|SE1150097A| SE535449C2|2011-02-09|2011-02-09|Oil trough for an internal combustion engine|
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