在使用玉河50型轻便摩托车时,笔者发现二个问题:一是化油器极易被堵塞,清洗过于频繁;二是实际耗油量比较大。该车的化油器采用的是PZ—15式平吸柱塞式化油器。它主要由以下部分组成:主量孔、怠速量孔、主空气通道、主空气量孔,节气门,油针,油杯等等(如图1所示)。它的工作原理是,通过把手上的油门转把使节气门上下移动,以达到调节开度的目的。节气门上装有油 In the use of Yuhe 50 light motorcycles, I found two problems: First, carburetors can easily be blocked, cleaned too often; second, the actual fuel consumption is relatively large. Car carburetor is PZ-15-type piston pump carburetor. It is mainly composed of the following parts: the main hole, idle hole, the main air passage, the main air hole, throttle, needle, cup and so on (Figure 1). Its working principle is, through the handle on the throttle to move the throttle up and down, in order to achieve the purpose of adjusting the opening. Throttle with oil