分别采用ＰＩＤ控制法和状态空间控制法对Ｂ１１３５柴油机—水力测功器系统进行数字控制，并基于准稳定模型建立了该柴油机的动态运动方程．实验表明，二种控制法都能使发动机稳定在预定工况点上，其转速偏差量小于±５ｒ／ｍｉｎ，扭矩偏差量小于±０．４Ｎ·ｍ．实验确定出ＰＩＤ控制法中的６个参数值．由于状态空间控制法的实现，还证实了发动机—水力测功器系统是一个非线性时变系统． The PID control method and the state space control method are respectively used to digitally control the B1135 diesel-hydro dynamometer system. Based on the quasi-steady model, the dynamic equation of motion of the diesel engine is established. Experiments show that the two control methods can make the engine stable at the predetermined operating point, the speed deviation less than ± 5r / min, torque deviation less than ± 0.4N · m. Experiments to determine the PID control method in six parameters. Due to the implementation of the state space control method, it is also confirmed that the engine-hydro dynamometer system is a nonlinear time-varying system.