可能有些新手朋友也是各种汽车零件、用品傻傻分不清楚，不过没关系，今天就给大家科普几个汽车上容易混淆的部件和常用品，不知道的赶紧收藏起来吧。
玻璃水；防冻液
玻璃水，顾名思义擦玻璃的，作用于前挡风玻璃；防冻液，冷却发动机，润滑冷却系统，防止冷却系统结冰、结垢的作用。
气门；节气门
气门是专门负责向发动机内输入燃料并排出废气，安装在发动机气缸体内。
节气门是控制空气进入发动机的一道阀门，与油门之间有根金属线连接，加油松油其实就是改变节气门开度的大小来控制进气量的大小，气体充分燃烧做功来实现加速减速。
差速器；差速锁
在汽车直线行驶的过程中，两个驱动轮的转速是相同的，但在转弯时因为车轮行驶距离不等长，转速肯定不相同，差速器的作用就在于允许左右两边的驱动轮以不同的转速运行。
差速锁是差速器上的一个配件，但作用正好和差速器相反，目的是不让差速器工作，不允许两侧驱动轮转速相同。
半轴；传动轴
半轴又叫驱动桥，是差速器和驱动轮之间传递扭矩的实心轴，一般分为全浮式和半浮式。
传动轴是轴管、伸缩套和万向节组成，是汽车传动系中传递动力的部件，主要作用与变速箱，驱动桥一起将发动机的动力传递给车轮。
爆震；爆燃
爆震主要是一种现象，发动机出现问题，产生一种高频敲击声，也叫敲缸。
爆燃是在气缸内因为积碳、燃油量过低，燃烧后气缸里的压力过高造成高频震荡。
（转自辽宁省道路交通安全协会）
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