| 摘要 |
A piston (10) includes a piston structure being unitarily formed in a powder metallurgy process, the piston structure having a crown assembly (250) and a skirt assembly (252), at least a partial combustion chamber 256 being formed intersecting a piston crown surface (254) during the powder metallurgy process. The skirt assembly (252) depends from the crown assembly (250) and has two spaced apart pin bosses (278(a)), (278(b)), each pin boss having a pin bore (284(a)) defined therein, a pair of opposed semi-circular skirt (292(a)), (292(b)) members, each skirt member extending outwardly from and being integrally joined to both of the pin bosses (278(a)), (278(b)). The piston (10) may be formed by executing a powder metallurgy process on at least two different metallic constituents to define a non-homogenous piston structure. A method of forming a piston (10) is further included. |
