公开(公告)号：US09822748B2

公开(公告)日：2017-11-21

申请号：US14292860

申请日：2014-05-31

Applicant: CUMMINS INC.

Inventor： Marian Trocki ,  Donald J. Benson ,  Tamas Rauznitz ,  Vijaygandeeban Subbaihaannadurai ,  Deepak Sahini

IPC: F02M61/12 ,  F02M61/04 ,  F02M45/12 ,  F02M63/00

CPC classification number: F02M61/042 ,  F02M45/12 ,  F02M61/12 ,  F02M63/0056 ,  F02M2200/28 ,  F02M2200/306

Abstract: An injector has an injector body including an injector cavity defining an inner wall and a longitudinal axis, an injector orifice and a plunger slidably disposed within the injector cavity. The plunger has an outer portion and an inner portion at different locations longitudinally along the plunger. The inner portion has a plurality of surface portions including a guiding portion configured to substantially mate with the inner wall of the injector cavity, guide the plunger to slidably move in a direction along the longitudinal axis and substantially prevent the plunger from laterally translating within the injector cavity. The plurality of surface portions also includes a restriction portion configured to form a restrictive cavity between an exterior surface of the inner portion and the inner wall of the injector cavity axially along a length of the inner portion.