随着配备液压混合动力系统的机动车数量的增加，描述这些系统各种部件的术语、缩写和首字母缩略词的数量也在增加。为了实现行业标准化，并为此类术语、缩写和首字母缩略词的扩散带来一些秩序，SAE卡车和客车液压混合动力委员会编制了本文件。

As the number of Hydraulic Hybrid Powertrain equipped motor vehicles has increased, the number of terms, abbreviations, and acronyms which describe various components of these systems has increased. For the sake of industry standardization and to bring some order to the proliferation of such terms, abbreviations, and acronyms, the SAE Truck and Bus Hydraulic Hybrid committee prepared this document.