测功机上的试验条件范围应足以确定与车辆全范围运行相对应的主要运行特性。待确定的特性为:a转矩比与速度比和输出速度b输入速度与速度比与输出速度c效率与速度比及输出速度d容积系数与速度比输出速度输入扭矩与输入速度注意:有关这些特性和液力传动设计的更多信息，请参阅“设计实践:乘用车自动变速器”，SAE工程进展，AE- 18（第三版）或AE-29（第四版）。

The range of test conditions on the dynamometer shall be sufficient to determine the primary operating characteristics corresponding to the full range of vehicle operations.The characteristics to be determined are:aTorque ratio versus speed ratio and output speedbInput speed versus speed ratio and output speedcEfficiency versus speed ratio and output speeddCapacity factor versus speed ratio and output speedeInput torque versus input speedNOTE: For more information about these characteristics and the design of hydrodynamic drives, refer to “Design Practices: Passenger Car Automatic Transmissions,” SAE Advances in Engineering, AE-18 (Third Ed.) or AE-29 (Fourth Ed.).