Exhaust manifold with shielded cooling

Abstract

An exhaust manifold configured to be coupled to a cylinder head of an internal combustion engine includes a manifold section. The manifold section includes a manifold tube configured to receive exhaust gas from the cylinder head, and a water jacket tube at least partially defining a tube configured to receive cooling fluid. The manifold tube is received in the water jacket tube. The manifold section further includes a support in a gap between the manifold tube and the water jacket tube, and an adaptor tube coupled to the water jacket tube and configured to provide flow communication between the cylinder head and the manifold tube.

1 . An exhaust manifold configured to be coupled to a cylinder head of an internal combustion engine, the exhaust manifold comprising:
 a manifold section including:
 a manifold tube configured to receive exhaust gas from the cylinder head, 
 a water jacket tube at least partially defining a tube configured to receive cooling fluid, the manifold tube being received in the water jacket tube, 
 a support in a gap between the manifold tube and the water jacket tube, and 
 an adaptor tube coupled to the water jacket tube and configured to provide flow communication between the cylinder head and the manifold tube. 
   
     
     
         2 . The exhaust manifold of  claim 1 , wherein the manifold tube defines a longitudinal axis and includes a manifold tube wall extending along the longitudinal axis, and wherein the manifold tube wall defines a manifold tube aperture receiving an end of the adaptor tube, such that flow communication is provided between the cylinder head and the manifold tube. 
     
     
         3 . The exhaust manifold of  claim 2 , wherein the water jacket tube defines a longitudinal axis and includes a water jacket tube wall extending along the longitudinal axis of the water jacket tube, wherein the water jacket tube wall defines a water jacket tube aperture receiving an end of the adaptor tube, wherein the adaptor tube and the water jacket tube are coupled to one another in a sealed manner, and wherein clearance is provided between the adaptor tube and the manifold tube. 
     
     
         4 . The exhaust manifold of  claim 3 , wherein the manifold tube wall includes a flange extending outwardly around the manifold tube aperture. 
     
     
         5 . The exhaust manifold of  claim 3 , wherein the adaptor tube and the manifold tube aperture are configured to provide flow communication between the adaptor tube and the gap between the manifold tube and the water jacket tube. 
     
     
         6 . The exhaust manifold of  claim 1 , wherein the adaptor tube includes a flange configured to be coupled to the water jacket tube, and a tube portion extending through the water jacket tube aperture and into the manifold tube aperture. 
     
     
         7 . The exhaust manifold of  claim 1 , wherein the support includes an annular ring, wherein the manifold tube is received in the annular ring, wherein the annular ring and the manifold tube are received in the water jacket tube, wherein the annular ring includes a longitudinally extending portion and a radially extending flange, and wherein the radially extending flange includes sections circumferentially separated from one another. 
     
     
         8 . An exhaust manifold configured to be coupled to a cylinder head of an internal combustion engine, the exhaust manifold comprising:
 a first manifold section and a second manifold section, wherein the first manifold section includes:
 a manifold tube configured to receive exhaust gas from the cylinder head, 
 a water jacket tube at least partially defining a tube configured to receive cooling fluid, the manifold tube being received in the water jacket tube, 
 a support in a gap between the manifold tube and the water jacket tube, and 
 an adaptor tube coupled to the water jacket tube and configured to provide flow communication between the cylinder head and the manifold tube, 
   wherein the first and second manifold sections are coupled to one another.   
     
     
         9 . The exhaust manifold of  claim 8 , wherein the first manifold section includes a first water jacket tube including a first flange and the second manifold section includes a second water jacket tube including a second flange, wherein the first manifold section and the second manifold section are coupled to one another via the first flange and the second flange, wherein the first manifold section includes a first manifold tube and the second manifold section includes a second manifold tube, and wherein the first manifold tube and the second manifold tube are coupled to one another via a slip joint. 
     
     
         10 . The exhaust manifold of  claim 8 , wherein the second manifold section includes a riser manifold section, wherein the riser manifold section is configured to provide flow communication between the first manifold section and a turbocharger of the engine, wherein the riser manifold section includes:
 a housing including a riser water jacket in flow communication with the water jacket tube of the first manifold section,   a riser manifold tube in flow communication with the manifold tube of the first manifold section, the riser manifold tube being received in the housing, and   a spacer between the housing and the riser manifold tube, the spacer extending across a gap between the housing and the riser manifold tube.   
     
     
         11 . The exhaust manifold of  claim 10 , wherein the riser manifold tube includes a Y-section configured to provide flow communication between the first manifold section and two turbochargers of the engine. 
     
     
         12 . An internal combustion engine comprising:
 a cylinder block defining a cylinder;   a cylinder head coupled to the cylinder block; and   an exhaust manifold coupled to the cylinder head, the cylinder head providing flow communication between the cylinder and the exhaust manifold, wherein the exhaust manifold includes:
 a manifold section including:
 a manifold tube configured to receive exhaust gas from the cylinder head, 
 a water jacket tube at least partially defining a tube configured to receive cooling fluid, the manifold tube being received in the water jacket tube, 
 a support in a gap between the manifold tube and the water jacket tube, and 
 an adaptor tube coupled to the water jacket tube and configured to provide flow communication between the cylinder head and the manifold tube. 
 
   
     
     
         13 . The internal combustion engine of  claim 12 , wherein the cylinder block defines a first cylinder and a second cylinder spaced longitudinally with respect to one another, and the cylinder head provides flow communication between the first and second cylinders and the exhaust manifold, and wherein the manifold section includes first and second adaptor tubes coupled to the cylinder head to provide flow communication between the cylinder head and the manifold tube. 
     
     
         14 . The internal combustion engine of  claim 13 , wherein the cylinder head includes a first cylinder head module associated with the first cylinder and a second cylinder head module associated with the second cylinder, wherein the first cylinder head module and the second cylinder head module are separate from one another, wherein the first and second adaptor tubes are coupled to the first and second cylinder head modules, and wherein the first cylinder head module is configured to be individually decoupled from the first adaptor tube without decoupling the second cylinder head module from the second adaptor tube, such that the first cylinder head module is removed from the cylinder block without removing the manifold section. 
     
     
         15 . The internal combustion engine of  claim 13 , wherein the cylinder block defines four cylinders spaced longitudinally from one another, and the exhaust manifold includes first and second manifold sections coupled to the cylinder head, wherein each of the first and second manifold sections includes first and second adaptor tubes configured to provide flow communication between the four cylinders and the manifold tubes of the first and second manifold sections. 
     
     
         16 . The internal combustion engine of  claim 15 , wherein the first manifold section includes a first water jacket tube including a first flange and the second manifold section includes a second water jacket tube including a second flange, wherein the first manifold section and the second manifold section are coupled to one another via the first flange and the second flange, wherein the first manifold section includes a first manifold tube and the second manifold section includes a second manifold tube, and wherein the first manifold tube and the second manifold tube are coupled to one another via a slip joint. 
     
     
         17 . The internal combustion engine of  claim 16 , wherein the engine includes a turbocharger, and wherein the exhaust manifold further includes a riser manifold section coupled to an end of one of the first and second manifold sections, wherein the riser manifold section provides flow communication between the first and second manifold sections and the turbocharger, wherein the engine extends between longitudinal ends, and wherein the turbocharger is located at one end of the engine. 
     
     
         18 . The internal combustion engine of  claim 16 , wherein the engine includes two turbochargers, and wherein the exhaust manifold further includes a riser manifold section coupled to an end of one of the first and second manifold sections, wherein the riser manifold section includes a Y-section configured to provide flow communication between the first and second manifold sections and the two turbochargers. 
     
     
         19 . The internal combustion engine of  claim 16 , wherein the exhaust manifold includes a removable end cap coupled to one end of one of the first and second manifold sections, the end cap preventing flow communication from the manifold tubes and the water jacket tubes of the first and second manifold sections and the surroundings. 
     
     
         20 . The internal combustion engine of  claim 12 , wherein the cylinder block includes water jacket passages configured to receive coolant, and wherein the water jacket tube of the manifold section is in flow communication with the water jacket passages of the cylinder block.