Exhaust line for automobile

Abstract

An exhaust line connected to the engine of an automobile, includes: a manifold ( 5 ) including at least one exhaust gas circulation channel ( 16 ) having an exhaust gas outlet ( 19 ), the manifold ( 5 ) including an outlet flange ( 13 ) through which the exhaust gas outlet ( 19 ) extends; a downstream apparatus ( 7 ) having an exhaust gas inlet ( 27 ) connected to the exhaust gas outlet ( 19 ) of the manifold ( 5 ), the downstream apparatus ( 7 ) being rigidly connected to the outlet flange ( 13 ) of the manifold ( 5 ). The engine ( 3 ) includes an engine block and a cylinder head ( 15 ), and the exhaust line ( 1 ) includes attachment elements ( 33 ) for attaching the outlet flange ( 13 ) of the manifold ( 5 ) directly to the engine block or the cylinder head ( 15 ).

1 . An exhaust line provided to be connected to the engine of an automobile, the exhaust line ( 1 ) comprising:
 a manifold ( 5 ) inwardly including at least one exhaust gas circulation channel ( 16 ) having an exhaust gas outlet ( 19 ), the manifold ( 5 ) comprising an outlet flange ( 13 ) through which the exhaust gas outlet ( 19 ) extends;   a downstream apparatus ( 7 ) having an exhaust gas inlet ( 27 ) connected to the exhaust gas outlet ( 19 ) of the manifold ( 5 ), the downstream apparatus ( 7 ) being rigidly connected to the outlet flange ( 13 ) of the manifold ( 5 ),   characterized in that the engine ( 3 ) comprises an engine block and a cylinder head ( 15 ), the exhaust line ( 1 ) comprising attaching means ( 33 ) for attaching the outlet flange ( 13 ) of the manifold ( 5 ) directly to the engine block or the cylinder head ( 15 ).   
     
     
         2 . The exhaust line according to  claim 1 , characterized in that the attaching means ( 33 ) comprises at least one elongated attaching member ( 35 ), having a first end portion ( 37 ) connected to the outlet flange ( 13 ) and a second end portion ( 39 ) connected to the engine block or the cylinder head ( 15 ). 
     
     
         3 . The exhaust line according to  claim 2 , characterized in that the attaching means ( 33 ) comprises at least one spacer ( 43 ) inserted along the or each attaching member ( 35 ) between the outlet flange ( 13 ) and the engine block or cylinder head ( 15 ), with or without the insertion of an inlet flange ( 9 ) of the manifold ( 5 ). 
     
     
         4 . The exhaust line according to  claim 2 , characterized in that the elongated attaching member ( 35 ) is of the type chosen from the group comprising a screw, a threaded rod, a lug stud, or a tierod. 
     
     
         5 . The exhaust line according to  claim 2 , characterized in that the circulation channel ( 16 ) of the exhaust gases has at least one exhaust gas inlet ( 17 ) capable of being connected to an outlet of the combustion chamber of the engine, the manifold ( 5 ) including at least one inlet flange ( 9 ) passed through by the exhaust gas inlet ( 17 ), the attaching member ( 35 ) passing through the inlet flange ( 9 ). 
     
     
         6 . The exhaust line according to  claim 5 , characterized in that the outlet flange ( 13 ) is substantially parallel to the or each inlet flange ( 9 ). 
     
     
         7 . The exhaust line according to  claim 5 , characterized in that the outlet flange ( 13 ) is inclined in relation to the or each inlet flange ( 9 ). 
     
     
         8 . The exhaust line according to  claim 1 , characterized in that the manifold ( 5 ) includes an enclosure ( 11 ) inwardly defining the exhaust gas circulation channel ( 16 ), the outlet flange ( 13 ) being welded to the enclosure ( 11 ). 
     
     
         9 . The exhaust line according to  claim 8 , characterized in that the downstream apparatus ( 7 ) has a companion flange ( 29 ) passed through by the exhaust gas inlet ( 27 ) of the downstream apparatus ( 7 ), the companion flange ( 28 ) being rigidly attached to the outlet flange ( 13 ) of the manifold. 
     
     
         10 . The exhaust line according to  claim 9 , characterized in that the companion flange ( 29 ) is attached to the outlet flange ( 18 ) of the manifold ( 5 ) using the means ( 33 ) for attaching the outlet flange ( 13 ) to the engine block or the cylinder head ( 15 ). 
     
     
         11 . The exhaust line according to  claim 8 , characterized in that the downstream apparatus ( 7 ) has an inlet duct ( 25 ) defining the exhaust gas inlet ( 27 ), the inlet duct ( 27 ) being welded on the outlet flange ( 13 ) of the manifold ( 5 ). 
     
     
         12 . The exhaust line according to  claim 1 , characterized in that the manifold ( 5 ) includes an enclosure ( 11 ) inwardly defining the exhaust gas circulation channel ( 16 ) and an intermediate flange ( 55 ) welded to the enclosure ( 11 ), the outlet flange ( 13 ) being rigidly attached to the intermediate flange ( 55 ) of the manifold ( 5 ). 
     
     
         13 . The exhaust line according to  claim 3 , characterized in that the elongated attaching member ( 35 ) is of the type chosen from the group comprising a screw, a threaded rod, a lug stud, or a tierod. 
     
     
         14 . The exhaust line according to  claim 3 , characterized in that the circulation channel ( 16 ) of the exhaust gases has at least one exhaust gas inlet ( 17 ) capable of being connected to an outlet of the combustion chamber of the engine, the manifold ( 5 ) including at least one inlet flange ( 9 ) passed through by the exhaust gas inlet ( 17 ), the attaching member ( 35 ) passing through the inlet flange ( 9 ). 
     
     
         15 . The exhaust line according to  claim 4 , characterized in that the circulation channel ( 16 ) of the exhaust gases has at least one exhaust gas inlet ( 17 ) capable of being connected to an outlet of the combustion chamber of the engine, the manifold ( 5 ) including at least one inlet flange ( 9 ) passed through by the exhaust gas inlet ( 17 ), the attaching member ( 35 ) passing through the inlet flange ( 9 ).