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发动机冷机在外力推动下启动时,转速较低,空气流速低,燃油在化油器中雾化不良,再加上进气系统及气缸、活塞等壁面温度低,从而造成燃油的汽化比例很低,气缸内混合气过稀,以至无法着火启动。启动系统的作用就是在启动时供给过量的汽油,以保证启动。启动系统一般有三种形式:阻风门启动系、手动旁路启动系、自动旁路启动系(俗称“电风门”)。 1.阻风门启动系在WY125系列摩托车的化油器上采用阻风门启动系,其结构如图1所示。当关闭阻风门启动
Engine cold when driven by external force, low speed, low air velocity, poor atomization of fuel in the carburetor, coupled with the intake system and the cylinder, the piston wall temperature is low, resulting in a very high percentage of fuel vaporization Low, too dilute mixture in the cylinder, and even unable to start the fire. The function of starting the system is to supply excess gasoline at start-up to ensure start-up. Start the system in general there are three forms: choke start system, manual bypass start system, automatic bypass start system (commonly known as “electric damper”). 1. The choke door start-up system uses the choke door start-up system on the carburetor of the WY125 series motorcycle, and its structure is shown in FIG. 1. When closing the choke starts