INSTANTANEOUS FLOW MEASURING INSTRUMENT OF GAS FUEL INJECTOR
    1.
    发明公开
    INSTANTANEOUS FLOW MEASURING INSTRUMENT OF GAS FUEL INJECTOR 有权
    MOMENTAN-STRÖMUNGSESSINSTRUMENTEINES GASBRENNSTOFFINJEKTORS

    公开(公告)号:EP1876429A4

    公开(公告)日:2008-11-19

    申请号:EP06730318

    申请日:2006-03-22

    IPC分类号: G01F9/00 G01F1/42

    摘要: A gas fuel injector (3) supplies gas fuel from a gas cylinder (1) into a measuring section thin tube (5), and a pressure measuring device (4) measures pressure variation in the tube through a small hole provided in the thin tube (5). On the downstream side of the measuring section thin tube (5), an extension thin tube (6) for removing the influence of reflected wave is provided. At the downstream side end of the extension thin tube, a back pressure valve (13) for increasing the pressure in the tube uniformly and bringing it close to the actual environment in the engine cylinder is provided. Furthermore, a tapered nozzle is arranged in the measuring section thin tube (5). Pressure measured by the pressure measuring device (4) is converted into the flow rate in the thin tube according to a predetermined calculation expression. Consequently, instantaneous flow rate of gas fuel being ejected from the gas fuel injector (3) can be measured.

    摘要翻译: 一个气体燃料喷射器(3)将来自气瓶(1)的气体燃料供应到测量部分细管(5)中,并且压力测量装置(4)通过设置在细管中的小孔测量管中的压力变化 (5)。 在测量部分细管(5)的下游侧,设置用于消除反射波影响的延伸细管(6)。 在延伸细管的下游侧端部设置有用于使管内的压力均匀地增加并使其接近发动机气缸内的实际环境的背压阀(13)。 此外,在测量部分细管(5)中设置锥形喷嘴。 根据预定的计算表达式将由压力测量装置(4)测量的压力转换成细管中的流量。 因此,可以测量从气体燃料喷射器(3)喷出的气体燃料的瞬时流量。