公开(公告)号：US20170241473A1

公开(公告)日：2017-08-24

申请号：US15048333

申请日：2016-02-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Dale E. Murrish ,  John B. Fisher ,  Scott A. Hucker ,  Amit Kumar ,  Balakrishna Chinta ,  James Dwight Cremonesi

IPC: F16C3/06 ,  B23B41/00 ,  B22D25/02 ,  B22D19/00 ,  B22D29/00

CPC classification number: F16C3/06 ,  B22D19/00 ,  B22D25/02 ,  B22D29/001 ,  B23B41/00 ,  B23B2215/20 ,  F16C3/10 ,  F16C3/14 ,  F16C2360/22

Abstract: A method of manufacturing a crankshaft assembly includes configuring a crankshaft with a crankpin journal having a cavity extending at least partially from a first axial side to a second axial side of the crankpin journal, and opening at at least one of the first axial side and the second axial side. The method includes disposing a core plug in the cavity. The crankshaft has a first density and the core plug may have a second density which may be less than the first density. A crankshaft assembly includes the crankshaft and the core plug.

公开(公告)号：US20170114898A1

公开(公告)日：2017-04-27

申请号：US14923597

申请日：2015-10-27

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Alan W. Hayman ,  Rodney E. Baker ,  Dale E. Murrish ,  Amit Kumar ,  Balakrishna Chinta

IPC: F16J1/16

CPC classification number: F16J1/16 ,  F02F3/00 ,  F04B39/0005 ,  F04B53/14 ,  F04B53/147

Abstract: An assembly such as a piston assembly for an engine includes a piston pin that has an outer member and a core. The outer member has a cavity extending lengthwise therethrough. The cavity has a first volume. The core is fit to the outer member in the cavity, and has a second volume less than the first volume. For example, the second volume may be less than the first volume because the core has an opening, because the core is shorter in length than the cavity, or both. A method of manufacturing a piston pin includes providing an outer member having a first density and a first length, creating a cavity that extends lengthwise through the outer member, providing a core having a second density and a second length, and inserting the core into the cavity of the outer member.