Radiator with internal header tank oil cooler

Abstract

A vehicle header tank of the type in which most or all of the header tank is metal and brazed concurrently with the rest of the core includes a simplified oil cooler structure integrated with the tank and brazed concurrently with the rest of the core. A section of tubing similar to the radiator coolant flow tubes passes into and out of the header tank through a pair of slots with a geometry similar to that in the regular slotted tank header plate that accommodates the coolant flow tubes. Consequently, the oil cooler tube can be installed in leak proof fashion inside the header tank concurrently with the main core braze operation.

1 . In an engine cooling radiator with a brazed core having a series of coolant flow tubes inserted into a slotted header plate of a header tank that are brazed to said slotted header plate to form leak proof joints, the improvement comprising, 
 a wall portion of said header tank having at least a pair of oil cooler slots formed therein of a geometry similar to said header plate slots, and,    an integrated oil cooler comprising a sealed tube having a pair of ends extending through said header tank oil cooler slots to the exterior of said header tank, said oil cooler tube ends being brazed concurrently with said core to form leak proof joints to said header tank.    
     
     
         2 . A radiator according to  claim 1 , further characterized in that said header tank wall portion is a header tank end cap.  
     
     
         3 . A radiator according to  claim 1 , further characterized in that said oil cooler tube is formed as a substantially flat metal extrusion.  
     
     
         4 . A radiator according to  claim 3 , further characterized in that said oil cooler tube is bent into a sinuous shape.  
     
     
         5 . A radiator according to  claim 1 , further characterized in that said oil cooler tube ends are proximate to one another and a single oil inlet-outlet fitting is joined thereto.