Exhaust gas cooling adapter

Abstract

An exhaust gas cooling adapter arranged between an exhaust port opening to a cylinder head of an engine and an exhaust manifold is equipped with an exhaust gas flow channel which is provided inside the exhaust gas cooling adapter and through which an exhaust gas from the exhaust port flows to the exhaust manifold, and a cooling liquid flow channel which is formed in a wall portion of the exhaust gas cooling adapter that surrounds the exhaust gas flow channel to cool the exhaust gas flowing through the exhaust gas flow channel. The wall portion has a blockage portion formed by blocking a through-hole provided between an outside and the cooling liquid flow channel. This blockage portion has a region located in the cooling liquid flow channel and arranged at a position other than a collision position of a cooling liquid flowing through the cooling liquid flow channel.

1 . An exhaust gas cooling adapter arranged between an exhaust port opening to a cylinder head of an internal combustion engine and an exhaust manifold, comprising:
 an exhaust gas flow channel which is provided inside the exhaust gas cooling adapter and through which an exhaust gas from the exhaust port flows to the exhaust manifold; and   a cooling liquid flow channel formed in a wall portion of the exhaust gas cooling adapter that surrounds the exhaust gas flow channel, to cool the exhaust gas flowing through the exhaust gas flow channel, wherein   the wall portion of the exhaust gas cooling adapter has a blockage portion formed by blocking a through-hole provided between an outside and the cooling liquid flow channel, and   the blockage portion has a region located in the cooling liquid flow channel and arranged at a position other than a collision position of a cooling liquid flowing through the cooling liquid flow channel.   
     
     
         2 . The exhaust gas cooling adapter according to  claim 1 , wherein the wall portion where the blockage portion is formed is provided above the cooling liquid flow channel in a vertical direction in a state of being arranged between the exhaust port opening to the cylinder head of the internal combustion engine and the exhaust manifold. 
     
     
         3 . The exhaust gas cooling adapter according to  claim 1 , wherein the wall portion is cast,
 the through-hole is a sand removal hole for removing cast sand constituting a core forming the cooling liquid flow channel, and   the blockage portion is blocked with a plug body.   
     
     
         4 . The exhaust gas cooling adapter according to  claim 1 , wherein a plurality of the exhaust gas flow channel are provided in arrangement, and
 the collision position of the cooling liquid is a position where a cooling liquid flow channel formed between the arranged exhaust gas flow channels is connected to another cooling liquid flow channel formed around the arranged exhaust gas flow channels.   
     
     
         5 . The exhaust gas cooling adapter according to  claim 4 , wherein the region of the blockage portion located in the cooling liquid flow channel is arranged at the position other than the collision position of the cooling liquid by being deviated in at least one of a direction of arrangement of the exhaust gas flow channels and a direction of exhaust gas flow in the exhaust gas flow channels from the collision position of the cooling liquid flowing through the cooling liquid flow channel. 
     
     
         6 . The exhaust gas cooling adapter according to  claim 5 , wherein the region of the blockage portion located in the cooling liquid flow channel is deviated in the direction of exhaust gas flow in the exhaust gas flow channels from the collision position of the cooling liquid flowing through the cooling liquid flow channel. 
     
     
         7 . The exhaust gas cooling adapter according to  claim 5 , wherein the region of the blockage portion located in the cooling liquid flow channel is deviated in the direction of arrangement of the exhaust gas flow channels from the collision position of the cooling liquid flowing through the cooling liquid flow channel. 
     
     
         8 . The exhaust gas cooling adapter according to  claim 5 , wherein the region of the blockage portion located in the cooling liquid flow channel is deviated both in the direction of exhaust gas flow in the exhaust gas flow channels and in the direction of arrangement of the exhaust gas flow channels from the collision position of the cooling liquid flowing through the cooling liquid flow channel. 
     
     
         9 . The exhaust gas cooling adapter according to  claim 1 , wherein the through-hole is positioned, before being blocked, such that an interior of the cooling liquid flow channel with which the cooling liquid collides is visible via the through-hole.