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在大多数的现代汽化器中,不论主油系的燃油量孔和空气量孔或是怠速油系的各量孔几乎都参与发动机的全部工况的燃油配剂作用.因之正确的选配上述系统中各量孔的流通截面对形成汽化器的特性有重要的意义.如能预先进行理论计算来分析量孔尺寸对汽化器特性的影响,则选配量孔试验的艰巨工作即可减轻不少. 在建立计算的特性时,必须预先确定作用于各量孔处的真空度.由于怠速系统参与可燃混合气成份的调整,因之计算汽化器油路内真空度的方程式可通过主配剂系统及怠速系统的
In most modern carburettors, almost all of the metering holes in the main oil gallery, the air holes, or the idle oil lines participate in the action of the fuel agent in all operating conditions of the engine. Therefore, The flow cross section of each hole in the system is of great importance to the formation of carburetor.If the theoretical calculation can be used to analyze the influence of the hole size on the carburetor characteristics, the arduous work of the optional hole test can be reduced a lot. In establishing the calculated characteristics, it is necessary to determine in advance the degree of vacuum acting on each orifice. Since the idle system is involved in the adjustment of the composition of the combustible mixture, the equation for calculating the degree of vacuum in the carburetor oil passage can be determined by the main compounding system and idling systematic