Patent ID: 6223701
Filing Date: 2001-05-01
Classification: F02F,F05C

Abstract:
A cooled one piece piston, comprising:a piston body having a top surface and a longitudinal axis;a support portion extending in a direction longitudinally from said piston body and defining a pair of spaced apart pin bosses, said pin bosses having a pin bore and a pin bore axis oriented transverse the longitudinal axis, said pin bore axis being spaced from said top surface;a flange portion extending in a direction radially outwardly from said piston body at a preselected location between the top surface and the pin bore;a piston ring belt portion disposed about said piston body, said piston ring belt portion being connected to said piston body and to said flange portion by welding;a piston cooling gallery disposed annularly in and about said piston body, said piston cooling gallery being located between the top surface and the pin bore, said piston cooling gallery being closed by said ring belt portion and said flange portion to define a closed piston cooling gallery therein, said closed piston cooling gallery being adapted to carry a cooling fluid therein, said closed piston cooling gallery having first and second spaced apart extreme end locations defining a preselected gallery length ""L"" sufficient to provide a preselected maximum amount of cooling fluid shaking space, said second extreme end location terminating at said flange portion; anda plurality of spaced apart piston ring grooves disposed in said piston ring belt, said piston ring grooves being spaced axially relative to the longitudinal axis between the first and second extreme end locations of the closed piston cooling gallery defining said gallery length ""L"", each piston ring groove of said plurality of piston ring grooves being cooled by the cooling fluid disposed in the closed piston cooling gallery located adjacent each piston ring groove.