公开(公告)号：US12241431B1

公开(公告)日：2025-03-04

申请号：US18586986

申请日：2024-02-26

Applicant: GM Global Technology Operations LLC

Inventor： Yi Liu ,  Qigui Wang ,  Richard L. Metcalf ,  Angela Zsidi Alksninis ,  Devin R. Hess ,  Purushotham Kunduru ,  Cherng-chi Chang

IPC: F02F7/00 ,  B23K26/352 ,  C21D1/09 ,  B23K101/00 ,  B23K103/06 ,  F02F1/00

Abstract: An engine block for a vehicle includes a bore surface defining a cylinder bore. The bore surface exhibits a first microstructure and includes a pattern of a plurality of cycloidal features formed in the bore surface. The plurality of cycloidal features each exhibit a first length in a first axis and a second length in a second axis arranged 90 degrees from the first axis. The plurality of cycloidal features also exhibit a ratio of the first length to the second length in a range of 1:1.5 to 1.5:1. The plurality of cycloidal features further exhibit a second microstructure including tempered martensite, wherein the second microstructure is different from the first microstructure. The engine block is included in a vehicle. The cycloidal features are formed with a laser.

公开(公告)号：US10253721B2

公开(公告)日：2019-04-09

申请号：US15485430

申请日：2017-04-12

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Qigui Wang ,  Bhuvaneswara R Dharmavarapu ,  Cherng-chi Chang

IPC: F02F1/00 ,  B22D19/00 ,  F02F1/02 ,  F02F1/16 ,  F04B39/12 ,  F02B23/06

Abstract: A cylinder liner for an engine block includes a first engine block bonding surface, and a second engine block bonding surface that provides a lower heat transfer coefficient between the cylinder liner and an adjacent engine block material than the first engine block bonding surface. The second engine block bonding surface extends a substantial portion of the axial length of the cylinder liner.

公开(公告)号：US20180298842A1

公开(公告)日：2018-10-18

申请号：US15485430

申请日：2017-04-12

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Qigui Wang ,  Bhuvaneswara R. Dharmavarapu ,  Cherng-chi Chang

IPC: F02F1/00

CPC classification number: F02F1/004 ,  F05C2251/048

Abstract: A cylinder liner for an engine block includes a first engine block bonding surface, and a second engine block bonding surface that provides a lower heat transfer coefficient between the cylinder liner and an adjacent engine block material than the first engine block bonding surface. The second engine block bonding surface extends a substantial portion of the axial length of the cylinder liner.