Heat exchange apparatus for exhaust gas

Abstract

In an EGR module including a tank, an EGR gas cooler arranged on the downstream side of the flow of the exhaust gas inside the tank, a bypass arranged in parallel with the EGR gas cooler and an exhaust gas flow rate ratio regulating valve arranged on the downstream side of the flow of the exhaust gas of the EGR gas cooler and the bypass, wherein the inlet port is arranged at a position of the tank at which at least an area of a portion of the inlet port opposing the bypass is greater than an area of a portion of the inlet port opposing the EGR gas cooler.

1 . A heat exchange apparatus for an exhaust gas including: 
 a tank which has an inlet port through which an exhaust gas generated by combustion passes and into which said exhaust gas flows from said inlet port;    a heat exchanger for an exhaust gas connected to said tank on the downstream side of the flow of said exhaust gas inside said tank, for executing heat exchange between said exhaust gas flowing from inside said tank and a cooling fluid;    a bypass connected to said tank on the downstream side of the flow of said exhaust gas inside said tank, for said exhaust gas inside said tank bypass said exhaust gas heat exchanger; and    an exhaust gas flow rate ratio regulating valve arranged on the downstream side of the flow of said exhaust gas of said exhaust gas heat exchanger and said bypass, for regulating a ratio of the flow rate of said exhaust gas flowing inside said exhaust gas heat exchanger and the flow rate of said exhaust gas flowing inside said bypass;    wherein said inlet port is arranged at a position of said tank at which at least an area of a portion of said inlet port opposing said bypass is greater than an area of a portion of said inlet port opposing said exhaust gas heat exchanger.    
   
   
       2 . A heat exchange apparatus for an exhaust gas according to  claim 1 , wherein said inlet port is formed in said tank at a position opposing only said bypass of said exhaust gas heat exchanger and said bypass.  
   
   
       3 . A heat exchange apparatus for an exhaust gas according to  claim 2 , wherein said inlet port is formed in said tank at a position at which an open end of said inlet port positioned on the side of said exhaust gas heat exchanger and an open end of said bypass positioned on the side of aid exhaust gas heat exchanger oppose each other.  
   
   
       4 . A heat exchange apparatus for an exhaust gas according to  claim 1 , wherein said tank includes a first outlet port to which said heat exchanger is connected, for guiding said exhaust gas inside said tank to said exhaust gas heat exchanger, and a second outlet port to which said bypass is connected, for guiding said exhaust gas inside said tank into said bypass.