Engine piston assembly and forged piston member therefor...

Details Engine piston assembly and forged piston member therefor... Engine piston assembly and forged piston member therefor...

F - Mech Eng,Light,Heat,Weapons

02

F

123/245

F02F 3/00 (2006.01) F02B 3/06 (2006.01)

Patent

CA 1322500

Abstract of the Disclosure ENGINE PISTON ASSEMBLY AND FORGED PISTON MEMBER THEREFOR HAVING A COOLING RECESS Present day diesel engines having aluminum piston assemblies are limited to combustion chamber pressure of approximately 12,410 kPa (1,800 psi) whereas the desire is to increase such pressures up to the 15,170 kPa (2,200 psi) range. To reach such levels the instant piston assembly includes a steel piston member having an upper cylindrical portion defining a top surface, a depending tubular wall and an annular cooling recess having one or more machined surfaces of revolution about n central axis. The cooling recess is located beneath the top surface and juxtaposed to the top ring groove for removing heat away therefrom in use. The piston member is preferably forged and subsequently machined to precisely controllable dimensions. Moreover, the piston assembly is preferably of the articulated type and includes a forged aluminum piston skirt connected to the piston member through a common wrist pin.

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