ISO 8178-7:2015规定了用于确定发动机系列中可能包括哪些发动机规格以及选择该系列的主发动机的参数。 ISO 8178-7:2015适用于陆上、铁路牵引和海上使用的往复式内燃机，不包括主要设计用于道路运行的机动车辆发动机。它可用于发电和/或推进发动机，例如农业设备、道路施工和土方机械、工业卡车、发电机组等。

ISO 8178-7:2015 specifies the parameters to be applied for the determination of which engine specifications may be included in an engine family and for the selection of the parent engine of the family. ISO 8178-7:2015 is applicable to reciprocating internal combustion engines for land, rail traction, and marine use, excluding engines for motor vehicles primarily designed for on-road operation. It may be applied to engines for power production and/or propulsion, e.g. agricultural equipment, road construction and earth moving machines, industrial trucks, generating sets, etc.