公开(公告)号：US5765755A

公开(公告)日：1998-06-16

申请号：US787963

申请日：1997-01-23

申请人： Lester L. Peters ,  Julius P. Perr ,  A. S. Ghuman ,  Benjamin M. Yen ,  Chad L. Buchanan ,  Robert Samuel ,  Kevin L. Vogt ,  John T. Carroll, III ,  James E. Denton ,  David E. Schisler

发明人： Lester L. Peters ,  Julius P. Perr ,  A. S. Ghuman ,  Benjamin M. Yen ,  Chad L. Buchanan ,  Robert Samuel ,  Kevin L. Vogt ,  John T. Carroll, III ,  James E. Denton ,  David E. Schisler

IPC分类号： F02M45/10 ,  F02M61/04 ,  F02M61/16 ,  F02M61/18 ,  B05B9/00 ,  F02M47/02

CPC分类号： F02M61/18 ,  F02M45/10 ,  F02M61/042 ,  F02M61/168

摘要： An injection rate shaping nozzle assembly for a fuel injector is provided which includes a closed nozzle valve element and a rate shaping control device including an injection spill circuit for spilling a portion of the fuel to be injected to produce a predetermined time varying change in the flow rate of fuel injected into a combustion chamber. The spill circuit includes a spill passage integrally formed in the nozzle valve element. The rate shaping control device may include a spill accelerating chamber in formed in the nozzle valve element for creating a rapid increase in the spill flow rate. A spill circuit purge device is provided to remove fuel from the spill circuit and accelerating chamber between each of the injection events thereby ensuring an unimpeded, effective spill fuel flow during the next spill event. The purge device includes a purge passage formed of a predetermined size for restricting the flow of purge gas to ensure sufficient fuel removal from the injection spill circuit while avoiding excessive purge gas flow. The purge passage may include an annular clearance gap formed between the nozzle valve element and the nozzle housing wall, or alternatively, may include an orifice passage formed in the inner portion of the nozzle valve element. An improved method for forming a nozzle valve element having an axial center passage is also disclosed.

摘要翻译： 提供了一种用于燃料喷射器的喷射率成形喷嘴组件，其包括封闭的喷嘴阀元件和速率整形控制装置，该速率整形控制装置包括用于溢出待喷射的燃料的一部分以产生流量的预定时变变化的喷射泄漏电路 喷入燃烧室的燃料的速率。 泄漏回路包括一体形成在喷嘴阀元件中的溢流通路。 速率整形控制装置可以包括形成在喷嘴阀元件中的溢流加速室，用于产生溢流量的快速增加。 提供溢流回路吹扫装置以在每次喷射事件之间从泄漏回路和加速室中除去燃料，从而确保在下一个溢出事件期间不受阻碍地有效地溢出燃料流。 净化装置包括由预定尺寸形成的吹扫通道，用于限制净化气体的流动，以确保足够的燃料从喷射泄漏电路中移除，同时避免过多的吹扫气体流动。 净化通道可以包括形成在喷嘴阀元件和喷嘴壳体壁之间的环形间隙，或者可以包括形成在喷嘴阀元件的内部中的孔口通道。 还公开了一种用于形成具有轴向中心通道的喷嘴阀元件的改进方法。

公开(公告)号：US6029913A

公开(公告)日：2000-02-29

申请号：US144970

申请日：1998-09-01

申请人： Bradlee J. Stroia ,  Dennis M. Ashwill ,  Chad L. Buchanan

发明人： Bradlee J. Stroia ,  Dennis M. Ashwill ,  Chad L. Buchanan

IPC分类号： F02M61/18 ,  F02M61/16

CPC分类号： F02M61/1806

摘要： A swirl tip injector nozzle housing is provided for a fuel injector which includes a fuel atomization enhancing feature for creating effective fuel atomization and breakup during discharge from the injector. The fuel atomization enhancing feature includes a plurality of curvilinear spray holes having an angle of curvature equal to approximately 90 degrees. Fuel flowing from the inlet of each spray hole to the outlet is induced, by the 90 degree angle of curvature, to flow through a tangential flow path or swirl within the spray hole causing rapid spreading and breakup of the fuel jet spray upon exiting the outlet of the spray hole. The fuel atomization enhancing feature may also include positioning each spray hole so as to extend orthogonally from the interior surface of the fuel cavity to create optimal entry of the fuel into the tangential flow path.

摘要翻译： 为燃料喷射器设置有旋转喷嘴喷嘴壳体，其包括用于在从喷射器排出的过程中产生有效的燃料雾化和分解的燃料雾化增强特征。 燃料雾化增强特征包括具有等于大约90度的曲率角的多个曲线喷雾孔。 通过90度曲率的角度引导从每个喷孔的入口流出到出口的燃料流过喷流孔内的切向流动路径或涡流，导致喷射喷嘴在离开出口时迅速扩散和分解 的喷孔。 燃料雾化增强特征还可以包括定位每个喷射孔，以便从燃料腔的内表面正交地延伸以产生燃料进入切向流动路径的最佳进入。