公开(公告)号：US11767804B1

公开(公告)日：2023-09-26

申请号：US18161516

申请日：2023-01-30

Applicant: GM Global Technology Operations LLC

Inventor： Lokesh Choudhary ,  Qigui Wang ,  Brian D Kaminski ,  Gregory Melekian ,  Ronald C. Daul ,  Kurt T. Hilvers

IPC: F02F1/00 ,  F02F1/18 ,  F02F7/00

CPC classification number: F02F1/18 ,  F02F7/0085

Abstract: An engine for a vehicle. The engine includes a cast engine block having a hybrid insert disposed in a fastener bore having rolled internal threads. The hybrid insert includes an internal surface having cut inner diameter (ID) threads and an external surface having rolled outer diameter (OD) threads. The rolled OD threads of the hybrid insert are received in the rolled internal threads of the fastener bore. The hybrid threaded insert may include a bi-metal in which the ID threads are formed of one metal alloy and the OD threads are formed of another metal alloy. Alternatively, the external surface of the hybrid insert may define locking features and the engine block is cast onto these locking features, thereby locking the hybrid insert to the engine block.

公开(公告)号：US11654476B2

公开(公告)日：2023-05-23

申请号：US17034530

申请日：2020-09-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Lokesh Choudhary ,  Tiruttani Munikamal ,  Qigui Wang ,  Liang Wang

IPC: B22C9/10 ,  B22D15/00 ,  B22D17/22

CPC classification number: B22C9/103 ,  B22D15/00 ,  B22D17/22

Abstract: A hybrid core for manufacturing a cast component, the hybrid core including a sand core portion having an exterior shape configured to define an interior feature of the cast component. The hybrid core also includes a metal chill element embedded within the sand core portion. The metal chill element is configured to locally absorb heat energy from the cast component during cooling of the cast component and solidification thereof. The metal chill element is constructed and arranged within the sand core portion to be removed during shake out from the cast component subsequent to the solidification thereof. A system and a method for manufacturing a cast component using such a hybrid core are also envisioned.

公开(公告)号：US11577331B2

公开(公告)日：2023-02-14

申请号：US17134986

申请日：2020-12-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Lokesh Choudhary ,  Qigui Wang ,  Tiruttani Munikamal ,  David A. Wulbrecht ,  Gregory Melekian ,  Anil K. Sachdev

IPC: B23G5/20 ,  B23G5/06 ,  B23G9/00

Abstract: A method of manufacturing a threaded hole in a workpiece includes providing the workpiece having a region with a hole. The method also includes cutting a threading for the hole. Furthermore, the method includes, independent of cutting the threading, densifying the region proximate the hole to reduce material porosity in the region.

公开(公告)号：US20220266366A1

公开(公告)日：2022-08-25

申请号：US17181438

申请日：2021-02-22

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Lokesh Choudhary ,  Tiruttani Munikamal ,  Qigui Wang ,  David A. Wulbrecht

IPC: B23G5/06

Abstract: A hybrid threading tap includes a reamer portion and a thread cutting portion having a plurality of cutting teeth. The thread cutting portion is arranged with the reamer portion along the longitudinal axis. The reamer portion is configured to be advanced within a hole of a workpiece to plastically deform and expand the hole to an expanded hole and provide the expanded hole with a zone of residual compressive stress. The plurality of cutting teeth is configured to cut a threading into the expanded hole within the zone.

公开(公告)号：US10781769B2

公开(公告)日：2020-09-22

申请号：US16214739

申请日：2018-12-10

Applicant: GM Global Technology Operations LLC

Inventor： Lokesh Choudhary ,  Su Jung Han ,  Martin S. Kramer ,  Brian W. Geiser ,  Brian Christopher Leuenhagen

IPC: F02F1/04 ,  F02F1/10 ,  B22D19/00 ,  F02F7/00 ,  B22D15/02 ,  F02F1/00 ,  F02B75/18

Abstract: A cylinder block for use in an internal combustion engine includes a first and second cylinder bores, a first and second cylinder bore liners, and a Siamese insert. The first and second cylinder bores are disposed adjacent to each other. The first and second cylinder bores each comprise a first cylinder bore wall and a second cylinder bore wall, respectively, and a shared cylinder bore wall. The first cylinder bore liner is disposed on a first inner surface of the first cylinder bore wall and the second cylinder bore liner is disposed on a second inner surface of the second cylinder bore wall. The Siamese insert is disposed in a top portion of the shared cylinder bore wall.