公开(公告)号：US20250052219A1

公开(公告)日：2025-02-13

申请号：US18720790

申请日：2022-12-20

Applicant: Cummins Inc.

Inventor： Romaine O. Edwards ,  Jason R. Garcia ,  Steve W. Gillespie

IPC: F02M47/02 ,  F02M55/00 ,  F02M63/00

Abstract: A fuel injector including a flow balanced injector needle seal is provided. The fuel injector includes a needle in a fuel passage of the fuel injector body. The needle moves longitudinally in the fuel passage to selectively stop and start fuel injection from the fuel passage. The fuel injector includes a check valve assembly that maintains pressurized fuel in the fuel passage and permits fuel flow out of the fuel passage in response to a fuel injection event. The needle seal is provided between the check valve assembly and a sleeve that extends around the proximal end of the needle. The needle seal includes multiple inlet orifices for receiving a fuel flow into the needle seal that are positioned relative to one another so that net lateral forces on the needle are effectively offset from one another.

公开(公告)号：US20240084770A1

公开(公告)日：2024-03-14

申请号：US18519527

申请日：2023-11-27

Applicant: Cummins Inc.

Inventor： Romaine O. Edwards ,  Jason R. Garcia ,  Steve W. Gillespie

IPC: F02M61/16 ,  B23B35/00 ,  F02M61/18

CPC classification number: F02M61/168 ,  B23B35/00 ,  F02M61/1806 ,  F02M2200/80

Abstract: A method for hard machining at least one orifice into a heat-treated fuel system component can include mounting the component into a holding fixture. The at least one orifice can include a first orifice. The method can include determining a desired orifice size of the at least one orifice based on a desired flow rate. The method can include hard machining the first orifice into the component. The method can include forming a first portion of the first orifice. The method can include forming, at an end of the first portion, a second portion of the first orifice. A diameter of the second portion can be smaller than a diameter of the first portion. The method can include forming a corner between the first portion and the second portion. The corner can have an edge condition having a dimension of 50 microns or less.

公开(公告)号：US20230003183A1

公开(公告)日：2023-01-05

申请号：US17784435

申请日：2019-12-19

Applicant: Mustafa Utku UNAL ,  Cummins Inc.

Inventor： Romaine O. Edwards ,  Mustafa Utku Unal ,  Aleksandr E. Lesin ,  Chin-Pei Wang ,  Neil Jeffries ,  Jason R. Garcia

IPC: F02M59/10 ,  F16H53/06 ,  F16H57/04

Abstract: A tappet roller assembly in which a roller shoe has a roller bore shaped to receive and retain a roller. The roller is sized and configured to rotate within the roller bore. The roller shoe may have a lubricating passage extending from a peripheral surface of the roller shoe to the roller bore to lubricate the roller.