它用来储存电，用于启动以及在发动机关闭时为钟、收音机和CD播放机等辅助装置供电。
It is used to store electricity, start and provide electricity for clock, radio and CD player and other accessary devices when the engine is closed.
根据液力耦合器的结构和工作原理，分析了液力耦合器辅助启动时驱动装置的力矩传递关系及数学模型，并以动态信号流程图的形式进行直观表达；
According to couplings' structure and operating principle, it analyzed the drive system dynamics with coupling, described the transmission process of torque, and showed the dynamical signal flow.
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