Exhaust manifold and internal combustion engine comprising an exhaust manifold

Abstract

An exhaust manifold assembly ( 40 ) including an exhaust manifold ( 17 ) that is at least partially surrounded by a cooling jacket ( 18 ) and combustion engine including such an exhaust manifold assembly.

1 . An exhaust manifold assembly ( 40 ) comprising: 
 an exhaust manifold ( 17 ) which is at least partially surrounded by a cooling jacket ( 18 ), wherein said cooling jacket ( 18 ) includes a first exhaust manifold cooling jacket outlet ( 21   d ), a second exhaust manifold cooling jacket outlet ( 21   e ) and a thermostat space ( 32   a ) at which a coolant outlet duct ( 21 ) is forked into said first and second exhaust manifold cooling jacket outlets ( 21   d,    21   e );    said exhaust manifold ( 17 ) includes a set of exhaust inlet ducts ( 17   a ) arranged to form part of an exhaust outlet leading from a set of cylinders ( 12 ); and    said coolant jacket ( 13 ) includes a coolant inlet duct ( 20 ) provided with a set of inlet openings ( 22   a - 22   d ) including at least one inlet opening ( 22   a - 22   d ) for each cylinder in said set of cylinders ( 12 ).    
   
   
       2 . The exhaust manifold assembly as recited in  claim 1 , wherein said set of inlet openings ( 22   a - 22   d ) are arranged to be connected to a corresponding set of outlet ports ( 6   a - 6   d ) arranged on a cylinder head ( 1 ).  
   
   
       3 . The exhaust manifold assembly as recited in  claim 2 , wherein said coolant inlet duct ( 20 ) is provided with an outlet opening ( 20   a ) which is arranged to be connected to an inlet opening ( 27 ) of coolant chamber ( 28 ) arranged in a turbo charger assembly ( 28 ).  
   
   
       4 . The exhaust manifold assembly as recited in  claim 2 , wherein said exhaust manifold cooling jacket ( 18 ) is divided by a partitioning wall ( 19 ) into said coolant inlet duct ( 20 ) and a coolant outlet duct ( 21 ).  
   
   
       5 . The exhaust manifold assembly as recited in  claim 4 , wherein said coolant inlet duct ( 20 ) and coolant outlet duct ( 21 ) are flow connected via at least one bypass opening ( 24 ).  
   
   
       6 . The exhaust manifold assembly as recited in  claim 5 , wherein said exhaust manifold ( 17 ) includes a set of exhaust inlet ducts ( 17   a ) in which at least one bypass opening ( 24 ) is provided per exhaust inlet duct ( 17   a ).  
   
   
       7 . The exhaust manifold assembly as recited in  claim 2 , wherein said coolant outlet duct ( 21 ) has a larger cross section than said coolant inlet duct ( 20 ).  
   
   
       8 . The exhaust manifold assembly as recited in  claim 1 , wherein said coolant outlet duct ( 21 ) extends between an inlet opening ( 21   a ) of said coolant outlet duct ( 21 ) and said first and second exhaust manifold cooling jacket outlets ( 21   d ,  21   e ).  
   
   
       9 . The exhaust manifold assembly as recited in  claim 8 , wherein said inlet opening of said coolant outlet duct ( 21 ) is arranged to be connected to an outlet opening ( 29 ) from a coolant chamber ( 28 ) arranged in a turbo charger assembly ( 26 ).  
   
   
       10 . An internal combustion engine ( 11 ) comprising: 
 a cylinder block ( 14 ) having a plurality of cylinders ( 12 ), a cylinder head ( 1 ) sealing said cylinder block ( 14 ) and an exhaust manifold assembly ( 40 );    said exhaust manifold assembly ( 40 ) comprising an exhaust manifold ( 17 ) which is at least partially surrounded by a cooling jacket ( 18 ) that includes a first exhaust manifold cooling jacket outlet ( 21   d ), a second exhaust manifold cooling jacket outlet ( 21   e ) and a thermostat space ( 32   a ) at which a coolant outlet duct ( 21 ) is forked into said first and second exhaust manifold cooling jacket outlets ( 21   d,    21   e );    said exhaust manifold ( 17 ) includes a set of exhaust inlet ducts ( 17   a ) forming part of an exhaust outlet leading from said plurality of cylinders ( 12 ); and    said coolant jacket ( 18 ) includes a coolant inlet duct ( 20 ) provided with a set of inlet openings ( 22   a - 22   d ) that include at least one inlet opening ( 22   a - 22   d ) for each cylinder in said plurality of cylinders ( 12 ).    
   
   
       11 . The internal combustion engine as recited in  claim 10 , wherein said set of inlet openings ( 22   a - 22   d ) are connected to a corresponding set of outlet ports ( 6   a - 6   d ) arranged on said cylinder head ( 1 ).  
   
   
       12 . The internal combustion engine as recited in  claim 11 , wherein said coolant inlet duct ( 20 ) is provided with an outlet opening ( 20   a ) connected to an inlet opening ( 27 ) to a coolant chamber ( 25 ) arranged in a turbo charger assembly ( 26 ).  
   
   
       13 . The internal combustion engine as recited in  claim 11 , wherein said exhaust manifold cooling jacket ( 18 ) is divided by a partitioning wall ( 19 ) into said coolant inlet duct ( 20 ) and coolant outlet duct ( 21 ).  
   
   
       14 . The internal combustion engine as recited in  claim 11 , wherein said coolant inlet duct ( 20 ) and coolant outlet duct ( 21 ) are flow connected via at least one bypass opening ( 24 ).  
   
   
       15 . The internal combustion engine as recited in  claim 14 , wherein said exhaust manifold ( 17 ) includes a set of exhaust inlet ducts ( 17   a ) wherein at least one bypass ( 24 ) opening is provided per exhaust inlet duct ( 17   a ).  
   
   
       16 . The internal combustion engine as recited in  claim 11 , wherein said coolant outlet duct ( 21 ) has a larger cross section than said coolant inlet duct ( 20 ).  
   
   
       17 . The internal combustion engine as recited in  claim 10 , wherein said coolant outlet duct ( 21 ) extends between an inlet opening ( 21   a ) of said coolant outlet duct ( 21 ) and said first and second exhaust manifold cooling jacket outlets ( 21   d,    21   e ).  
   
   
       18 . The internal combustion engine as recited in  claim 17 , wherein said inlet opening ( 21   a ) of said coolant outlet duct ( 21 ) is connected to art outlet opening ( 29 ) from a coolant chamber ( 28 ) arranged in a turbo charger assembly ( 26 ).  
   
   
       19 . The internal combustion engine as recited in  claim 11 , wherein said cylinder head ( 1 ) includes a top face ( 1   a ), a bottom face ( 1   b ) connected to said cylinder block ( 14 ), a lateral exhaust flange face ( 1   c ) connected to said exhaust manifold assembly ( 40 ), a second lateral face ( 1   d ) being opposed to said lateral exhaust flange face ( 1   c ), a front face ( 1   e ) and an end face ( 1   f ), said cylinder head ( 1 ) being provided with an integral coolant cross over passage ( 2 ) providing a first port ( 2   a ) connected to said first exhaust manifold cooling jacket outlet ( 21   d ) and extending between said first port ( 2   a ) arranged at said lateral exhaust flange face ( 1   c ) of said cylinder head ( 1 ) and a first coolant outlet duct ( 2   b ) arranged at another of said faces ( 1   a ,  1   b ,  1   d ,  1   e ,  1   f ).  
   
   
       20 . The internal combustion engine as recited in  claim 19 , wherein said first coolant outlet duct ( 2   b ) is arranged on said second lateral face ( 1   d ).  
   
   
       21 . The internal combustion engine as recited in  claim 20 , wherein said second lateral face ( 1   d ) is an intake flange face connected to an intake manifold ( 7 ).  
   
   
       22 . The internal combustion engine as recited in  claim 19 , wherein said integral coolant cross over passage ( 2 ) is connected to a coolant pump ( 37 ) via a heat exchanger ( 36 ).  
   
   
       23 . The internal combustion engine as recited in  claim 19 , wherein said cylinder head ( 1 ) is provided with an integral coolant short circuit passage ( 3 ) providing a second port ( 3   a ) connected to a second outlet ( 21   e ) of said exhaust manifold cooling jacket ( 18 ) and extending between said second port ( 3   a ) arranged at said lateral exhaust flange face ( 1   c ) and a second coolant outlet duct ( 3   b ) arranged at another of said faces ( 1   a,    1   b .  1   d ,  1   e ,  1   f ) leading to a coolant pump ( 36 ) inlet.  
   
   
       24 . The internal combustion engine as recited in  claim 23 , wherein said second port ( 3   b ) is provided at said bottom face ( 1   b ).  
   
   
       25 . The internal combustion engine as recited in  claim 19 , wherein said cylinder head ( 1 ) is provided with a coolant chamber ( 23 ) arranged for cooling a plurality of exhaust channels ( 5   a - 5   h ) provided in said cylinder head ( 1 ), wherein said lateral exhaust flange face ( 1   c ) is provided with at least one outlet port ( 6   a - 6   d ) for each cylinder in said plurality of cylinders ( 12 ), said outlet ports ( 6   a - 6   d ) being connected to said coolant chamber ( 23 ) and provide connections to a corresponding set of inlets ( 22   a - 22   d ) arranged on said exhaust manifold cooling jacket ( 18 ).