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公开(公告)号：WO2011054613A1
公开(公告)日：2011-05-12
申请号：PCT/EP2010/064853
申请日：2010-10-05
Applicant: DELPHI TECHNOLOGIES HOLDING S.À.R.L. , DINGLE, Philip
Inventor： DINGLE, Philip
CPC classification number: F02M47/027 , F02M45/12 , F02M63/004
Abstract: A fuel injector (100; 200; 300) for an internal combustion engine is disclosed. The injector includes a slave piston (130; 230; 330) provided with a control bore (144; 244; 344) and associated with a valve needle (110; 210; 310), such that movement of the slave piston causes movement of the valve needle. An end of the slave piston remote from the valve needle is exposed to fuel pressure in a control chamber (152; 252; 352) of the injector, in use. A control piston (148; 348) is operable to move relative to the slave piston so as to control fuel flow through first and second control ports that connect the control bore to a high-pressure fuel supply and a low-pressure drain respectively. By suitable positioning of the control piston, the valve needle can be biased in an opening direction and in a closing direction and, optionally, the valve needle can be held in one or more intermediate positions between its fully-lifted and fully-seated positions. Proportional control of the position and velocity of the valve needle is possible, and a low-force actuator can be used to control the valve needle.
Abstract translation: 公开了一种用于内燃机的燃料喷射器（100; 200; 300）。 喷射器包括设置有控制孔（144; 244; 344）并与阀针（110; 210; 310）相关联的从动活塞（130; 230; 330），使得从动活塞的运动引起 阀针。 远离阀针的从活塞的一端在使用中暴露于喷射器的控制室（152; 252; 352）中的燃料压力。 控制活塞（148; 348）可操作以相对于从动活塞移动，以便控制通过分别将控制孔连接到高压燃料供应和低压排放的第一和第二控制口的燃料流。 通过控制活塞的适当定位，阀针可以沿打开方向和关闭方向偏置，并且可选地，阀针可以保持在其完全提升和完全就位之间的一个或多个中间位置。 可以对阀针的位置和速度进行比例控制，并且可以使用低力致动器来控制阀针。
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公开(公告)号：EP2188517B1
公开(公告)日：2012-08-01
申请号：EP08789576.9
申请日：2008-08-07
Applicant: Delphi Technologies Holding S.à.r.l.
Inventor： DINGLE, Philip
CPC classification number: F02M61/168 , F02D41/2467 , F02D41/3827 , F02D41/40 , F02D2041/1433 , F02D2200/0602 , F02D2200/0604 , F02M57/005 , F02M2200/21 , F02M2200/24 , F02M2200/247 , F02M2200/8092 , Y02T10/44
Abstract: A fuel injector for an internal combustion engine, the fuel injector comprising an injector body, a fuel supply passage defined in the injector body, the fuel supply passage containing fuel under high pressure in use of the injector, a pressure sensor for measuring the pressure of fuel in the passage in use, wherein the pressure sensor is situated within the injector body and is separated from fuel in the passage in use, and a method of fuel injection, comprising constructing an hydraulic behaviour profile by fuel pressure measurement, using the hydraulic behaviour profile to predict fuel pressure that will prevail in a fuel injector during an injection event, and supplying a control signal to the fuel injector to control the amount of fuel injected during the injection event in accordance with the predicted fuel pressure. By predicting the fuel pressure that will prevail during an injection event, the fuel delivered during the injection event can be accurately controlled.
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公开(公告)号：EP2188517A2
公开(公告)日：2010-05-26
申请号：EP08789576.9
申请日：2008-08-07
Applicant: Delphi Technologies Holding S.à.r.l.
Inventor： DINGLE, Philip
CPC classification number: F02M61/168 , F02D41/2467 , F02D41/3827 , F02D41/40 , F02D2041/1433 , F02D2200/0602 , F02D2200/0604 , F02M57/005 , F02M2200/21 , F02M2200/24 , F02M2200/247 , F02M2200/8092 , Y02T10/44
Abstract: A fuel injector for an internal combustion engine, the fuel injector comprising an injector body, a fuel supply passage defined in the injector body, the fuel supply passage containing fuel under high pressure in use of the injector, a pressure sensor for measuring the pressure of fuel in the passage in use, wherein the pressure sensor is situated within the injector body and is separated from fuel in the passage in use, and a method of fuel injection, comprising constructing an hydraulic behaviour profile by fuel pressure measurement, using the hydraulic behaviour profile to predict fuel pressure that will prevail in a fuel injector during an injection event, and supplying a control signal to the fuel injector to control the amount of fuel injected during the injection event in accordance with the predicted fuel pressure. By predicting the fuel pressure that will prevail during an injection event, the fuel delivered during the injection event can be accurately controlled.
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