公开(公告)号：US20230399994A1

公开(公告)日：2023-12-14

申请号：US18034237

申请日：2021-10-08

Applicant: Cummins Inc.

Inventor： Robert G. Sperry ,  Jordan E. Kelleher ,  Jeffrey A. Wheitner ,  Jeffrey D. Olmstead ,  Myron T. Rickard ,  David J. Eckroth

IPC: F02F1/22 ,  F02B75/28

CPC classification number: F02F1/22 ,  F02B2075/025 ,  F02F2200/06 ,  F02B75/28

Abstract: A method for finishing at least one port within a cylinder of a two-stroke engine, comprising tracing a curvature of an existing port hole for the at least one port using a force sensing tool, wherein forming an engine block for a two-stroke engine, comprising: casting the engine block, wherein the cast engine block includes at least one intake port and at least one exhaust port; rough machining a cylinder of the engine block, wherein at least one of the at least one intake port and the at least one exhaust port is positioned along a wall of the cylinder and both of the at least one intake port and the at least one exhaust port are fluidly coupled to the cylinder; and finishing an edge of at least one of the at least one intake port and the at least one exhaust port to provide a smooth surface.

公开(公告)号：US12129810B2

公开(公告)日：2024-10-29

申请号：US18034237

申请日：2021-10-08

Applicant: Cummins Inc.

Inventor： Robert G. Sperry ,  Jordan E. Kelleher ,  Jeffrey A. Wheitner ,  Jeffrey D. Olmstead ,  Myron T. Rickard ,  David J. Eckroth

IPC: F02F1/22 ,  F02B75/28 ,  F02B75/02

CPC classification number: F02F1/22 ,  F02B75/28 ,  F02B2075/025 ,  F02F2200/06

Abstract: A method for finishing at least one port within a cylinder of a two-stroke engine, comprising tracing a curvature of an existing port hole for the at least one port using a force sensing tool, wherein forming an engine block for a two-stroke engine, comprising: casting the engine block, wherein the cast engine block includes at least one intake port and at least one exhaust port; rough machining a cylinder of the engine block, wherein at least one of the at least one intake port and the at least one exhaust port is positioned along a wall of the cylinder and both of the at least one intake port and the at least one exhaust port are fluidly coupled to the cylinder; and finishing an edge of at least one of the at least one intake port and the at least one exhaust port to provide a smooth surface.