公开(公告)号：US09644590B2

公开(公告)日：2017-05-09

申请号：US14170129

申请日：2014-01-31

Applicant: Cummins Inc.

Inventor： Paul Peavler ,  Donald J. Benson ,  Paul Douglas Free ,  Jeffrey C. Huang ,  Eric Benham ,  C. Edward Morris, Jr.

IPC: F02M55/00 ,  F02M69/04 ,  F02M47/02

CPC classification number: F02M69/04 ,  F02M47/027 ,  F02M55/008 ,  F02M2200/28 ,  F02M2200/315

Abstract: A fuel injector has a plurality of injection fuel delivery passages, which transport fuel from a proximate end to an injector cavity near the distal end of the fuel injector, wherein less than a total number of injection fuel delivery passages include an orifice. This configuration provides a reduction in fueling variation from pulse to pulse (multi-pulse) with respect to pulse separation due to pressure variation while allowing a sufficient amount of fuel flow to the injector cavity. Thus, the consistency of Start-Of-Injection (SOI) and opening rate both improve significantly and advantageously. For compactness, the orifices may be positioned in a cover plate used to retain the components of the injection control valve assembly and may further be arranged in an arc segment when viewed along a longitudinal axis.