Engine valve

Abstract

A valve for use in an internal combustion engine is provided. The valve includes a valve head. The valve head includes a combustion face configured to face a combustion chamber of the internal combustion engine. The combustion face includes an angular side portion. The combustion face also includes a central recess portion defining an inner diameter and an outer diameter. The inner diameter and the outer diameter together define a depth of the central recess portion. The valve also includes a neck portion configured to connect the valve head with a valve stem of the valve.

What is claimed is: 
     
         1 . A valve for use in an internal combustion engine, the valve comprising:
 a valve head comprising:
 a combustion face configured to face a combustion chamber of the internal combustion engine, the combustion face comprising:
 an angular side portion; and 
 a central recess portion defining an inner diameter and an outer diameter, wherein the inner diameter and the outer diameter together define a depth of the central recess portion; and 
 
   a neck portion configured to connect the valve head with a valve stem of the valve.   
     
     
         2 . The valve of  claim 1 , wherein the valve includes at least one of an intake valve and an exhaust valve. 
     
     
         3 . The valve of  claim 1 , wherein a deflection of the combustion face relative to an imaginary plane is between 0.07 mm and 0.082 mm. 
     
     
         4 . The valve of  claim 1 , wherein the depth of the central recess portion is between 3 mm and 4 mm. 
     
     
         5 . The valve of  claim 1 , wherein a radius of the neck portion is between 12 mm and 20 mm. 
     
     
         6 . The valve of  claim 5 , wherein the radius of the neck portion is 17 mm. 
     
     
         7 . The valve of  claim 1 , wherein an angle defined between the angular side portion of the combustion face and a planar surface of the combustion face is between 9° and 10°, the planar surface being disposed between the angular side portion and the central recess portion. 
     
     
         8 . An engine comprising:
 a cylinder block having at least one combustion chamber;   a cylinder head positioned on the cylinder block, the cylinder head defining at least one passage; and   a gas exchange valve received within the at least one passage defined in the cylinder head, the gas exchange valve configured to allow selective fluid communication between the at least one combustion chamber and the at least one passage, the gas exchange valve comprising:
 a valve head comprising:
 a combustion face configured to face the at least one combustion chamber of the engine, the combustion face comprising:
 an angular side portion; and 
 a central recess portion defining an inner diameter and an outer diameter, wherein the inner diameter and the outer diameter together define a depth of the central recess portion; 
 
 
 a neck portion extending from the valve head; and 
 a valve stem connected to the neck portion. 
   
     
     
         9 . The engine of  claim 8 , wherein the gas exchange valve includes at least one of an intake valve and an exhaust valve. 
     
     
         10 . The engine of  claim 8 , wherein a deflection of the combustion face relative to an imaginary plane is between 0.07 mm and 0.082 mm. 
     
     
         11 . The engine of  claim 8 , wherein the depth of the central recess portion is between 3 mm and 4 mm. 
     
     
         12 . The engine of  claim 8 , wherein a radius of the neck portion is between 12 mm and 20 mm. 
     
     
         13 . The engine of  claim 12 , wherein the radius of the neck portion is 17 mm. 
     
     
         14 . The engine of  claim 8 , wherein an angle defined between the angular side portion of the combustion face and a planar surface of the combustion face is between 9° and 10°, the planar surface being disposed between the angular side portion and the central recess portion. 
     
     
         15 . A valve for use in an internal combustion engine, the valve comprising:
 a valve head comprising:
 a combustion face configured to face a combustion chamber of the internal combustion engine, the combustion face comprising:
 an angular side portion; and 
 a central recess portion defining an inner diameter and an outer diameter, wherein the inner diameter and the outer diameter together define a depth of the central recess portion; and 
 
   a neck portion configured to connect the valve head with a valve stem of the valve,   wherein a deflection of the combustion face relative to an imaginary plane is between 0.07 mm and 0.082 mm.   
     
     
         16 . The valve of  claim 15 , wherein the valve includes at least one of an intake valve and an exhaust valve. 
     
     
         17 . The valve of  claim 15 , wherein the depth of the central recess portion is between 3 mm and 4 mm. 
     
     
         18 . The valve of  claim 15 , wherein a radius of the neck portion is between 12 mm and 20 mm. 
     
     
         19 . The valve of  claim 18 , wherein the radius of the neck portion is 17 mm. 
     
     
         20 . The valve of  claim 15 , wherein an angle defined between the angular side portion of the combustion face and a planar surface of the combustion face is between 9° and 10°, the planar surface being disposed between the angular side portion and the central recess portion.