自动挡车停车时一般建议先拉手刹,再挂p档。从驻车可靠性来说,P挡要好过手刹,很多人学车时都遇到过忘记松手刹的情况,但车辆依然可以行驶。如果挂了P挡,那车辆是完全不能行驶的。
处于P档的时,安装在变速箱壳体上的棘爪与变速器内部的齿轮啮合,卡住整个变速器的传动部件,从而卡住汽车整个传动系统,防止忘记拉手刹时出现遛车的情况。
如果先挂P档,再拉手刹,那么承担固定车辆工作的是变速器上棘轮和齿轮啮合。
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