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    ENGINE PISTON ASSEMBLY AND FORGED PISTON MEMBER THEREFOR HAVING A COOLING RECESS
    2.
    发明专利
    ENGINE PISTON ASSEMBLY AND FORGED PISTON MEMBER THEREFOR HAVING A COOLING RECESS 未知

    公开(公告)号：CA1322500C

    公开(公告)日：1993-09-28

    申请号：CA607246

    申请日：1989-08-01

    Applicant: CATERPILLAR INC

    Inventor： COOPER BRUCE C ,  ERICKSON KENTON L ,  GREEN JAMES A ,  NYCZ DAVID S

    IPC: F01P3/08 ,  F02B3/06 ,  F02F3/00 ,  F02F3/22 ,  F16J1/00

    Abstract: 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.

    ENGINE PISTON ASSEMBLY AND FORGED PISTON MEMBER THEREFOR HAVING A COOLING RECESS
    5.
    发明专利
    ENGINE PISTON ASSEMBLY AND FORGED PISTON MEMBER THEREFOR HAVING A COOLING RECESS 未知

    公开(公告)号：AU3215889A

    公开(公告)日：1990-05-14

    申请号：AU3215889

    申请日：1989-02-23

    Applicant: CATERPILLAR INC

    Inventor： COOPER BRUCE C ,  ERICKSON KENTON L ,  GREEN JAMES A ,  NYCZ DAVID S

    IPC: F01P3/08 ,  F02B3/06 ,  F02F3/00 ,  F02F3/22 ,  F16J1/00

    Abstract: Present day diesel engines having aluminum piston assemblies are limited to combustion chamber pressures 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 a 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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