公开(公告)号：US20160177900A1

公开(公告)日：2016-06-23

申请号：US14580820

申请日：2014-12-23

Applicant: Cummins Inc.

Inventor： Donald J. Benson ,  Ahmad M. Sabri ,  Hanumantharao Konakanchi

IPC: F02M55/00 ,  F02M63/00

CPC classification number: F02M55/002 ,  F02M47/027 ,  F02M63/0012 ,  F02M63/0225

Abstract: A fuel injector, comprising an injector body having a longitudinal axis, an injector cavity, an injector orifice at a distal end of the injector cavity, and an inlet conduit configured to supply fuel into the injector cavity, a nozzle valve in the injector cavity, a drain circuit configured to drain fuel from the injector cavity to a low pressure drain, a pilot valve in flow communication with the drain circuit, a chamber housing having an inlet passage to receive fuel from the injector cavity, a return port in flow communication with the pilot valve to drain fuel to the drain circuit, and an abutting surface surrounding the return port, and a control body slidably disposed in the chamber housing, the control body having, a distal end, a proximal end, and a longitudinal axis parallel with the injector body longitudinal axis, a first depression at the distal end defining a first control chamber in which one end of the nozzle valve is guided, a second depression at the proximal end defining a second control chamber in flow communication with the return port, and an annular seal disposed radially of the second depression having a first diameter at an inner surface and a second diameter at an outer surface, wherein the first diameter is smaller than the second diameter.

Abstract translation: 一种燃料喷射器，包括具有纵向轴线的喷射器主体，喷射器腔体，喷射器腔体的远端处的喷射器孔口以及被构造成将燃料供应到喷射器腔体中的入口导管，喷射器腔体中的喷嘴阀， 排水回路，其构造成将来自所述喷射器腔的燃料排出到低压排放口，与所述排放回路流体连通的先导阀，具有用于从所述喷射器腔接收燃料的入口通道的腔室壳体， 所述先导阀将燃料排放到所述排水回路，以及围绕所述返回端口的邻接表面以及可滑动地设置在所述腔室壳体中的控制体，所述控制体具有与所述控制主体平行的远端，近端和纵向轴线 所述喷射器主体纵向轴线，所述远端处的第一凹陷限定了其中所述喷嘴阀的一端被引导的第一控制室，所述近端处的第二凹陷定义 与所述返回端口流动连通的第二控制室，以及设置在所述第二凹部的径向上的环形密封件，所述第二凹部在内表面具有第一直径，在外表面具有第二直径，其中所述第一直径小于所述第二直径 。

公开(公告)号：US10077748B2

公开(公告)日：2018-09-18

申请号：US14580820

申请日：2014-12-23

Applicant: Cummins Inc.

Inventor： Donald J. Benson ,  Ahmad M. Sabri ,  Hanumantharao Konakanchi

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

CPC classification number: F02M55/002 ,  F02M47/027 ,  F02M63/0012 ,  F02M63/0225

Abstract: A fuel injector, comprising an injector body having a longitudinal axis, an injector cavity, an injector orifice at a distal end of the injector cavity, and an inlet conduit configured to supply fuel into the injector cavity, a nozzle valve in the injector cavity, a drain circuit configured to drain fuel from the injector cavity to a low pressure drain, a pilot valve in flow communication with the drain circuit, a chamber housing having an inlet passage to receive fuel from the injector cavity, a return port in flow communication with the pilot valve to drain fuel to the drain circuit, and an abutting surface surrounding the return port, and a control body slidably disposed in the chamber housing, the control body having, a distal end, a proximal end, and a longitudinal axis parallel with the injector body longitudinal axis, a first depression at the distal end defining a first control chamber in which one end of the nozzle valve is guided, a second depression at the proximal end defining a second control chamber in flow communication with the return port, and an annular seal disposed radially of the second depression having a first diameter at an inner surface and a second diameter at an outer surface, wherein the first diameter is smaller than the second diameter.