公开(公告)号：EP2179169A1

公开(公告)日：2010-04-28

申请号：EP08750807.3

申请日：2008-06-05

Applicant: Delphi Technologies Holding S.à.r.l.

Inventor： GREEVES, Godfrey

IPC: F02M65/00

CPC classification number: F02M65/001

Abstract: An apparatus and method is described for testing a multi-hole fuel injector nozzle. The apparatus comprises mounting means for the multi-hole nozzle and fuel supply means for supplying fuel to the multi-hole nozzle. The multi-hole nozzle is mounted outside a measurement chamber for capturing the fuel spray from an individual spray hole outlet of the multi-hole nozzle. In one embodiment, the apparatus includes a spray target plate, located within the measurement chamber, at which the fuel spray is directed. The spray target plate (28) is connected to a remote pressure sensor, which is used to determine the spray force of the fuel spray acting on the spray target plate. The apparatus is further arranged to determine the mass flow rate of the fuel spray. A new parameter, referred to as ‘momentum efficiency’ is defined, and calculated using the determined values of spray force and mass flow rate.

Abstract translation: 描述了一种用于测试多孔燃料喷射器喷嘴的装置和方法。 该装置包括用于多孔喷嘴的安装装置和用于向多孔喷嘴供应燃料的燃料供给装置。 多孔喷嘴安装在测量室外部，用于从多孔喷嘴的单个喷射孔出口捕获燃料喷雾。 在一个实施例中，该装置包括位于测量室内的喷射目标板，燃料喷雾被引导到该喷射目标板。 喷射目标板（28）连接到远程压力传感器，用于确定作用在喷射目标板上的燃料喷雾的喷射力。 该装置还被布置成确定燃料喷雾的质量流量。 定义了一个称为“动量效率”的新参数，并使用确定的喷射力和质量流量值进行计算。

公开(公告)号：EP2268913A1

公开(公告)日：2011-01-05

申请号：EP09733295.1

申请日：2009-03-30

Applicant: Delphi Technologies Holding S.à.r.l.

Inventor： GREEVES, Godfrey ,  TULLIS, Simon

IPC: F02M45/08 ,  F02M61/18 ,  F02M63/00

CPC classification number: F02M45/086 ,  F02M61/1813 ,  F02M61/182 ,  F02M2200/46

Abstract: A fuel injector mountable with respect to a combustion chamber for delivering fuel thereto, the combustion chamber comprising a chamber ceiling (30) and a chamber wall, the fuel injector comprising a nozzle body (21) having a primary nozzle axis (A- A); a first outlet opening (23; 33) having a first axis (27; 37); a second outlet opening (24; 34) having a second axis (28; 38); and means for controlling fuel delivery through the first and second outlet openings (23, 24; 33, 34). The means for controlling fuel delivery comprises an inner valve needle and an outer valve needle, and is arranged to permit fuel delivery from only the first outlet opening (23, 33), or through both the first and second outlet openings (23, 24; 33, 34) together. The first and second outlet openings (23, 24; 33, 34) are oriented such that, in use, when fuel delivery is permitted through only said first outlet opening (23; 33), a first spray formation is injected along the first axis (27; 37), the first spray formation reaching a first target distance below said chamber ceiling (30) at a radial distance from the primary nozzle axis (A-A). When fuel delivery is permitted through both openings (23, 24; 33, 34) together, respective first and second spray formations are injected along the respective first and second axes (27, 28; 37, 38) to merge externally of the injector so as to give rise to a combined spray formation having a third axis (29; 39). The combined spray formation reaches a second targetdistance below said chamber ceiling (30) at said radial distance from the primary nozzle axis (A-A), and is substantially equivalent to a spray formation delivered as if from a single outlet opening having a diameter greater than that of the first outlet opening (23; 33). The first target distance is less than the second target distance.