公开(公告)号：US11674487B2

公开(公告)日：2023-06-13

申请号：US17304127

申请日：2021-06-15

Applicant: Caterpillar Inc.

Inventor： Cory Andrew Brown ,  Adam L. Stecklein

IPC: F02M61/10 ,  F02M61/20

CPC classification number: F02M61/10 ,  F02M61/20 ,  F02M2200/9053

Abstract: A fuel injector includes a needle valve including a spring-retaining section and a guide section that is adjacent to the spring-retaining section. The spring-retaining section includes an elongated portion and a flange that are together configured to support a spring assembly. The guide section includes a plurality of constricted portions alternatingly arranged with a plurality of expanded portions to define an undulating shape of the guide section. Each of the plurality of expanded portions includes a plurality of indentations to permit fuel to travel therealong to exit an outlet of the fuel injector. The guide section has a length that is substantially equal to a length of the spring-retaining section.