Abstract:
The invention relates to a suction housing ( 1 ) for an internal combustion engine, especially for arranging between a first ( 2 ) and a second ( 3 ) compressor of an internal combustion engine, characterized in that the suction housing ( 1 ) comprises an inner space ( 8 ) defined by a bottom element ( 9 ), a first ( 10 ) and a second ( 11 ) opposing lateral wall elements projecting from the bottom element ( 9 ), and a first ( 12 ) and a second ( 13 ) opposing front wall elements projecting from the bottom element. An open end ( 14 ) having an inlet ( 14   a ) via which charge air can enter the inner space ( 8 ) of the suction housing ( 1 ) is formed opposite the bottom element ( 9 ), and a web element ( 17 ) projecting from the bottom element ( 9 ) and arranged between the first ( 10 ) and the second ( 11 ) lateral wall elements is located in the inner chamber, said web element interconnecting the first ( 12 ) and the second ( 13 ) front wall elements. The first lateral wall element ( 10 ) has a first outlet ( 15 ) and the second lateral wall element ( 11 ) has a second outlet ( 16 ) for respective flow towards a compressor inlet ( 2   b   , 3   b ).

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to German Patent Application 10 2009 052 163.1 filed on Nov. 6, 2009 and PCT/EP2010/006729 filed on Nov. 4, 2010, which are hereby incorporated by reference in their entireties. 
     TECHNICAL FIELD 
     The present disclosure concerns a suction housing. 
     BACKGROUND 
     For combustion engines or motors, occasionally several charger groups or turbo charger groups are provided. In particular, it is known with diesel motors in V-design with two-step charging by means of turbo chargers (e.g., low-pressure and high-pressure chargers) to provide one cylinder bank for each charger group, while one charger group generally comprises several turbo chargers, e.g., for multi-step compression. In a package-optimal configuration, the air inlets of the first compressor steps are therein mostly arranged exactly opposite from each other, while the compressors can rotate in the same or opposite direction. 
     A compressor of the first charger group of the first cylinder bank and a compressor of the second charger group of the second cylinder bank must aspire the charge air (coming from the air filter) in such a way that no reciprocal influence and no shifting of the stabilization of compressor characteristics takes place because of the 90-degree deflection, e.g., in consequence of thrust or flow separation upstream from the compressor. 
     In order to supply both compressors with charge air, the charge air must be deflected very sharply in the known configurations, which often leads to a significant worsening of the stabilization of compressor characteristics. A deflection is achieved, for example, by means of Y-pipes, which are arranged between the compressors. In this kind of solution the induction pipe branches off, e.g., to two compressors. What is disadvantageous therein is especially the considerable assembly space, which is required for the large induction radius. 
     On this basis, the present disclosure has the purpose of proposing a suction housing, which overcomes the aforementioned disadvantages, and which can be embodied by a charger arrangement that saves significant space, or which can achieve a narrower package dimensioning within the combustion engine. 
     SUMMARY 
     According to the disclosure, a suction housing for a combustion engine is proposed, in particular for arrangement between a first and a second compressor of a combustion engine, wherein the suction housing has an internal space, which comprises a floor element, a first and second side wall element that are located opposite from each other and protrude from the floor element, as well as a first and second front wall element that are located opposite from each other and protrude from the floor element, while an open end with an inlet opening for the inflow of charge air into the internal space of the suction housing is provided opposite from the floor element, wherein a bar element is formed in the internal space that is arranged between the first and second side wall element and protrudes from the floor element while connecting the first and the second front wall element with each other, and wherein respectively the first side wall element has a first outlet opening and the second side wall element has a second outlet opening for inflow into a compressor inlet. 
     In an embodiment of the suction housing, the bar element protrudes essentially vertically from the floor element. 
     In an additional embodiment of the suction housing, the first and the second side wall element as well as the first and second front wall element protrude essentially vertically from the floor element. 
     Furthermore, a suction housing is proposed wherein the bar element connects the first and second front wall element in such a way that a profile is formed from the first and second front wall element as well as the bar element, which essentially has an H-shape, in particular an H-shape with a bar arranged centered between the first and second flank of the H-shape. 
     According to another embodiment of the suction housing, the floor element has a rib element, which protrudes from the floor element in the direction toward the internal space and which is arranged transversely, in particular vertically, to the bar element. 
     In an embodiment of the suction housing, the first outlet opening of the first side wall element is arranged opposite from the second outlet opening of the second side wall element. At this the first and second outlet opening can have identical outlet cross-sections. 
     Furthermore, in an additional embodiment, the first and second outlet openings have the same distance to the floor element and/or a front wall element and/or the bar element. 
     A suction housing is also proposed wherein the floor element in connection with the first and second front wall element essentially forms a U-shape in the cross-section. 
     Furthermore, a suction housing is proposed wherein the first and/or second outlet opening in the direction from the floor to the inlet opening is formed above the rib element. 
     In an embodiment of the suction housing, the first and/or second side wall element in the area of the first and second outlet opening in the direction of the outlet have a funnel shape or a funnel shaped cross-section. 
     Furthermore, a suction housing is proposed wherein the bar element divides the internal space of the suction housing into two chambers, in particular such that they are identical in volume. 
     In another embodiment of the suction housing, the suction housing has a fastening element on the open end. 
     In yet another embodiment of the suction housing, the side wall element has a fastening device on an outside wall that is arranged opposite from the inside wall, in particular for fastening a bellows. 
     Also proposed is a combustion engine with a first and second compressor, wherein a suction housing is arranged between the first and second compressor. 
     In another embodiment of the combustion engine, the first compressor is arranged with a compressor inlet on the first outlet opening and/or the second compressor with a compressor inlet on the second outlet opening. 
     In yet another embodiment of the combustion engine, a bellows is arranged between a compressor and the suction housing. 
     Additional characteristics and advantages are shown in the following description of exemplifying embodiments, by means of the figures and drawings and in the Claims. The individual characteristics can each be embodied by themselves or in several optional combinations. 
     Preferred embodiments of the invention are explained in more detail in the following by means of the enclosed drawings. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  shows a possible embodiment of a suction housing that is arranged between two compressors; 
         FIG. 2  shows a possible embodiment of the suction housing that is arranged between two compressors according to  FIG. 1 ; 
         FIG. 3  shows a cross-section view as an example for the suction housing arranged between two compressors along the A-A line of  FIG. 2 ; and 
         FIG. 4  shows a cross-section view as an example for the suction housing arranged between two compressors along the B-B line of  FIG. 2 . 
     
    
    
     DETAILED DESCRIPTION 
     In the following description and in the drawings, identical reference characters refer to elements of same or comparable function. 
       FIG. 1  shows a suction housing  1 , which is arranged between a first compressor  2  and a second compressor  3 . The first  2  compressor is, for example, the compressor of a first turbo charger  4 , the second  3  compressor is, for example, a compressor of a second turbo charger  5 , wherein the first  4  and second  5  turbo charger are, for example, exhaust gas turbo chargers in a combustion engine, or alternatively, e.g., mechanical chargers, e.g., drive chargers. The compressors  2 ,  3  can be provided for implementation of a multi-step charging wherein the air is compressed through several compressors that are connected in series. The compressors  2 ,  3  can therein be according to known method, e.g., each a compressor of a first compression stage. 
     The compressors  2 ,  3  each have, e.g., one compressor wheel (not shown), each of which is arranged in a compressor housing  6 ,  7  for rotation, and each of which is driven by a turbine wheel that is arranged in the exhaust gas flow of the turbo charger  4 ,  5  or in another known way. At this the compressor wheels in an arrangement upstream from the first  2  and second  3  compressor can turn, e.g., in same or opposite rotation direction. The compressors  2 ,  3 , for example, each have an inlet side  2   a ,  3   a  with a compressor inlet or inlet opening  2   b ,  3   b  ( FIG. 3 ) for charge air that is inflowing or, e.g., to be transported in the direction of the combustion chamber, and each also have an outlet side for discharge of the charge air. In the present configuration of the suction housing  1  between the first  2  and second  3  compressor, e.g., each inlet side  2   a ,  3   a  of the compressors  2 ,  3  is arranged adjacent to the suction housing  1 . 
     The suction housing  1  comprises an internal space  8 , which is embodied, e.g., as a hollow space. The internal space  8  is limited or closed by a floor element  9 , in particular toward the bottom. The floor element  9 , for example, has an essentially square profile, e.g., with a vault or bulge in the direction of an exterior side of the suction housing  1 . A first  10  and a second  11  wall element or side wall element protrude from the floor element  9 , and they are arranged opposite from each other, e.g., each on one edge of the floor element  9  or lateral from it. The first  10  and the second  11  side wall element, for example, protrude vertically or essentially vertically from the floor element  9 , and are each, for example, plate-shaped. The internal space  8  is provided between the first  10  and second  11  side wall element, e.g., in form of the hollow space. 
     Furthermore, the internal space  8  is enclosed or surrounded by a third and fourth wall element, or a first  12  and a second  13  front wall element, each of which protrudes likewise from the floor element  9  or extends in upward direction. The first  12  and a second  13  front wall elements are arranged opposite from each other on the floor element  9 , e.g., each on one edge of the floor element  9  and, e.g., each connected with a first  10  and a second  11  side wall element, e.g., in a gas-resistant way, e.g., by means of an edge section. The front wall elements  12 ,  13 , e.g., are also formed in plate-shape. The first  10  and second  11  side wall elements as well as the first  12  and a second  13  front wall elements enclose or extend around the internal space  8  and protrude, e.g., each vertically or essentially vertically from the floor element  9 . They thereby form, e.g., an essentially square cross-section and are, e.g., integrally connected with the floor element  9 . 
     One end of the suction housing  1  located opposite from the floor element  9  is, for example, embodied as an open end  14 , which has an inlet opening  14   a  for a charge airflow, which, e.g., originates from a charge air cooler or, e.g., an air filter of a combustion engine. Through the inlet opening  14   a , in particular during the combustion engine operation, e.g., charge air flows into the internal space  8  of the suction housing  1 , thus from the open end  14  in the direction of the floor element  9 . The charge air can for this purpose be led or carried into the internal space  8  through the inlet opening  14   a , e.g., from an induction pipe, which, e.g., is installed with one end or, e.g., an adapter piece, on the open end  14 . 
     The charge air is, for example, aspired by the first  2  and second  3  compressor, each of which is arranged on the suction housing  1  with their inlet side  2   a ,  3   a , e.g., adjacent to it. In order for a compressor  2 ,  3  to be able to aspire the charge air through the suction housing  1 , the suction housing  1  comprises, e.g., a first outlet opening  15 , which, e.g., is provided in the first front wall element  10  and an additional, second outlet opening  16 , which, e.g., is provided in the second side wall element  11 . By means of the first  15  and second  16  outlet opening, a charge air flow from the open end  14  through the outlet openings  15 ,  16  to one of the compressors  2 ,  3  that are connected with them, or their inlet openings  2   b ,  3   b  can be designed, e.g., if the suction housing  1  is charged with underpressure from the respective compressor  2 ,  3  by means of the outlet openings  15 ,  16 . 
     In the internal space  8  of the suction housing  1  a bar element  17  is provided, which, for example, protrudes from the floor element  9 , e.g., vertically or essentially vertically from it. The bar element  17  is, for example, plate-shaped and embodies, for example, the function of a partition wall. The bar element  17  divides, for example, the internal space  8  into two chambers  18  and  19 , in particular hollow chambers  18 ,  19 , each of which are connected with an outlet opening  15  or  16  and the open end  14  in terms of flow, and e.g., have the same volume, e.g., each an internal space  18   a ,  19   a . The bar element  17  connects the first  12  and the second  13  front wall element and is arranged between the first  10  and a second  11  front wall element, e.g., essentially in parallel and centered between the side wall elements  10 ,  11 . The bar element  17  in this respect forms an H-shaped profile with the first  12  and second  13  front wall element, in particular with an H-bar and H-flanks that are aligned vertically to each other. At this the H-flank is arranged in particular centered between the H-flanks, wherein the H-bar lengths can exceed that of the H-flanks. 
     By means of the bar element  17 , as mentioned above, two chambers  18 ,  19  are separated in the internal space  8  of the suction housing  1 , in each of which a charge airflow can be created that is to greatest extent unaffected by the charge air flow of the other chamber  18 , or, respectively  19 . Thus a compressor  2 ,  3  arranged on the outside wall of the side wall element  10 ,  11  of the respective chamber  18 ,  19  does not exert interrupting influence on the respective compressor  3 ,  2  that are respectively arranged on the side wall element  11 ,  10  of the other chamber  19 ,  18 . 
     In, e.g., the operation of the combustion engine, the charge air, as mentioned above, flows in from the open end  14  into the suction housing  1 , wherein the charge airflow is divided by the bar element  17  or distributed to the chambers  18 ,  19  that are formed in the internal space  8 . In order to allow for the charge air of the respective chambers  18 ,  19  or that of the respective internal space  18   a ,  19   a  to flow through the respective outlet opening  15 ,  16  into the designated compressor  2 ,  3 , or in order to achieve a homogenous flow conduction, the internal space  8  of the suction housing  1 , in particular in the area of the outlet openings  15 ,  16  or around the outlet openings  15 ,  16  is, e.g., designed for large volume. 
     For this purpose, e.g., a circular volume can be designed in the area of the outlet openings  15 ,  16 , e.g., the first  10  and/or second  11  side wall element in the area of the respective outlet opening  15 ,  16  in the outlet direction  20  can have a funnel shape or a funnel-shaped profile  21 , which, e.g., supports the flow conduction. The side wall element  10 ,  11  can for this purpose, e.g., have a bulge  22  around each of the outlet openings  15 ,  16  (toward the external side opposite from the internal space  8 ), e.g., a bulge  23  around each outlet opening  15 ,  16 , or a large volume in another way that supports the flow, or which creates a circular volume. Thus the air can not only flow from the top or the inlet opening  14   a  into the compressor  2 ,  3 . At this, a diameter of the outlet openings  15 ,  16  has, e.g., significantly smaller dimensions relative to a distance from the front wall elements  12 ,  13  (or the H-bar length). 
     In order to be able to create an airflow in the suction housing  1  that has, e.g., low spin or no spin, the internal space  8  or each hollow chamber  18 ,  19  can have, e.g., a profile tampered in the direction of the lower interior end  24  ( FIG. 1 ), which can be formed by the floor element  9  or by the connection with the front wall elements  12 ,  13 . For example, the first  12  and a second  13  front wall element can together with the floor element  9  enclose the internal space  8  in the cross section in a U-shape, wherein the bar of the U-shape arranged at the bottom can bulge to the bottom or into the inlet direction  25 . This can be achieved, e.g., by a bulge of the floor element  9  into the inlet direction  25  (vault in the direction of the inlet). 
     Furthermore, one or several connecting points or joints  26  can also be provided in the internal space, each of which are to be rounded or designed in a bend shape, e.g., between a side wall element  10 ,  11  and a front wall element  12 ,  13 , between a side wall element  10 ,  11  and a floor element  9 , between a front wall element  12 ,  13  and the floor element  9 , between the bar element  17  and a front wall element  12 ,  13 , as well as between the bar element  17  and the floor element  9  (inside corners in cross-section) in order to avoid disrupting swirls in the charge airflow. 
     In order to reduce the spin of inflowing air or charge air, in particular, e.g., a backflow of charge air into the direction of the open end  14   a , a rib element  27  can be arranged on the floor element  9 , which protrudes from it in the direction of the internal space  8 , counter to the inlet direction  25 , and which thereby works, e.g., on the airflow, to prevent spin on the floor side. The rib element  27  is, for example, arranged vertically or transversely to the bar element  17  (e.g., offset by 90 degrees) and encompasses, e.g., only a fraction of its extent in the direction of the inlet opening  14   a , e.g., up to slightly below the inlet openings  15 ,  16 . The rib element  27  is, for example, arranged on both sides of the bar element  17 , each on the floor element  9  or in each chamber  18 ,  19 , e.g., centered between the first  12  and a second  13  front wall element and e.g., essentially parallel with each of these. 
     So that the airflow in the two chambers  18 ,  19  can be designed essentially identical, the first  15  and the second  16  outlet opening (in outlet direction) are opposite each other and/or have the same outlet cross-section. In particular, e.g., the first  15  and the second  16  outlet opening have the same distance from the floor element  9 , and are arranged above the same, thus at equal height. It is furthermore intended that the first  15  and the second  16  outlet opening have the same distance from the respective front wall element  12 ,  13  and/or to the bar element  17 . In this respect, the suction housing  1 , for example, is symmetrical to a center axis A, which, e.g., runs through the bar element  17 . 
     Around the compressors  2 ,  3 , each of which is to be connected with an outlet opening  15 ,  16  of the suction housing  1 , it is provided that one or one side wall element  10 ,  11  each has a fastening device  28 , in particular on one of the external sides opposite from the internal space  8 , by means of which, for example, a bellows  29  can be fastened to the side wall element  10 ,  11  around the outlet opening  15 ,  16  and so that the compressor inlet can be fastened permanently, e.g., permanently so that it cannot be loosened without destructive intervention. 
     So to be able to connect the suction housing  1  with additional components of the combustion engine, additionally provided are, for example, one or several fastening device(s)  30  on the open end  14  and/or a side or front wall element and/or the floor element  9 , each of which allow for a permanent fastening, e.g., permanently so that it cannot be loosened without destructive intervention. The fastening device  30  can, e.g., be designed as a flange element  31 , e.g., for screw connection with a corresponding flange element. 
     So to embody a combustion engine, e.g., a suction housing  1  is arranged between a first  2  and a second  3  compressor. At this the inlet opening  2   b  of the first compressor  2  is arranged, e.g., adjacent to the outlet opening  15  of the first side wall element  10  and the inlet opening  3   b  of the second compressor  3 , e.g., adjacent to the outlet opening  16  of the second side wall element  11 , in particular for a flow connection. The compressor  2 ,  3  can therein each be in a fixed connection with the suction housing  1 , e.g., by means of a fastening device  28  of the suction housing  1 . At this, common fastening methods can be used. 
     It is provided to arrange the compressor, e.g., by means of a bellows  29  on the suction housing  1 , so that sealing is achieved by the bellows  29 , as applies by using an additional seal, e.g., a ring seal, and so that, e.g., a simultaneous decoupling of the compressor  2 ,  3  from the suction housing  1 , e.g., a vibration decoupling, is facilitated. A bellows  29  is, e.g., a tubular configuration that is variable in its longitudinal and/or cross extension in consequence of folding, and which can follow suit to the longitudinal and/or cross extension of the components that are connected by it. One end of the bellows  29  is arranged or fastened, e.g., around the compressor inlet or a compressor inlet opening  2   b  or  3   b . The second end is, e.g., arranged around the outlet opening  15  or  16  to be connected for flow on the outside of the side wall element  10  or  11  and the suction housing  1 , e.g., by means of the fastening device  28  and a corresponding fastening means  32  that is, e.g., arranged on the bellows.