公开(公告)号：WO2013178443A1

公开(公告)日：2013-12-05

申请号：PCT/EP2013/059511

申请日：2013-05-07

Applicant: DELPHI TECHNOLOGIES HOLDING S.À.R.L.

Inventor： HARCOMBE, Anthony ,  MEEK, George

IPC: F02M47/02

CPC classification number: F02M61/042 ,  F02M47/027 ,  F02M47/06

Abstract: The present invention relates to a fuel injector (1) for use in delivering fuel to an internal combustion engine. The fuel injector (1) includes a nozzle having at least one nozzle outlet. A valve needle is moveable with respect to a valve needle seating through a range of movement between a closed position and an open position to control fuel delivery through the at least one nozzle outlet. The movement of the nozzle needle is controlled by fuel pressure within a control chamber (18). The injector (1) has first and second nozzle control valves (8, 10) for controlling fuel flow into and out of the control chamber (18) to pressurise and depressurise the control chamber, respectively. The first nozzle control valve (10) can operate selectively to place the control chamber (18) in fluid communication with a fuel drain (28). The first nozzle control valve (8) can also operate selectively to place the control chamber (18) in fluid communication with a high pressure supply line (26). The second nozzle control valve (10) can operate selectively to place the control chamber (18) in fluid communication with a fuel drain (30). In an alternate arrangement, a filling valve (80) can be provided selectively to place a high pressure supply line (24) in fluid communication with the control chamber (18). The present invention also relates to a method of operating a fuel injector (1); and a fuel injector control system.

Abstract translation: 本发明涉及一种用于向内燃机输送燃料的燃料喷射器（1）。 燃料喷射器（1）包括具有至少一个喷嘴出口的喷嘴。 阀针可相对于阀针运动，该阀针位于关闭位置和打开位置之间的运动范围内，以控制通过至少一个喷嘴出口的燃料输送。 喷嘴针的移动由控制室（18）内的燃料压力控制。 喷射器（1）具有第一和第二喷嘴控制阀（8,10），用于控制进入和离开控制室（18）的燃料流量，以分别对控制室进行加压和减压。 第一喷嘴控制阀（10）可以选择性地操作以将控制室（18）与燃料排放管（28）流体连通。 第一喷嘴控制阀（8）还可以选择性地操作以使控制室（18）与高压供应管线（26）流体连通。 第二喷嘴控制阀（10）可以选择性地操作，以将控制室（18）与燃料排出口（30）流体连通。 在替代布置中，可以选择性地设置填充阀（80）以将高压供应管线（24）与控制室（18）流体连通。 本发明还涉及一种操作燃料喷射器（1）的方法; 和燃料喷射器控制系统。