针对发动机瞬时转速的测量方法及测试系统进行了研究。分析了发动机转速对测量结果的影响,以及两种测量方法的精度。提出了对发动机瞬时转速分段测量的优化方案,并进行了模拟测试试验。 Aiming at the measurement method and test system of engine instantaneous speed, The influence of engine speed on the measurement results and the accuracy of the two measurement methods were analyzed. The optimization scheme for measuring the instantaneous speed of the engine is proposed and the simulation test is carried out.