“化学火柴”在本文中指的是一种拖拉机冷起动装置,它能使冷状态的发动机在—40℃的情况下,几秒钟、最多也不过十几秒钟内快速可靠地起动着。人们不禁要问:冷起动装置怎能称为“化学火柴”呢?这得从这种装置的结构和起动特点说起。冷起动装置由起动液、压力瓶和喷射器组成。压力瓶内装有165毫升起动液并压入二氧化碳气体,使瓶内保持5～8公斤/厘米~2的气压。起动液的主要成分是乙醚65%、丙酮20%、航空煤油7%和润滑油、抗爆剂、抗氧化剂等。喷射器由单向阀和喷嘴组成,用以雾化喷射和控制。当发动机起动时,按动压力瓶的单向阀嘴,起动液就通过喷嘴向进气管或空气滤清 “Chemical match” in this context refers to a tractor cold start device that enables a cold state engine to start up quickly and reliably at -40 ° C in seconds, up to a dozen or seconds . One can not but ask: How can a cold start device be called a “chemical matchstick?” This starts with the structure and start-up features of this device. Cold starting device consists of starter fluid, pressure bottle and ejector. The pressure bottle is equipped with 165 milliliters of starting solution and pressed into the carbon dioxide gas, so that the bottle to maintain 5 ~ 8 kg / cm ~ 2 pressure. The main components of the starting solution is ether 65%, acetone 20%, aviation kerosene 7% and lubricants, antiknock agents, antioxidants. The ejector consists of a check valve and a nozzle for atomizing the spray and control. When the engine starts, press the one-way valve pressure bottle mouth, the starter fluid through the nozzle to the intake pipe or air filtration