一种汽油机有效功率测量不确定度的评定方法

测量不确定度对发动机性能评定有着重要影响。根据性能试验方法的要求,确定影响不确定度的分量并建立数学模型。在发动机试验台架上按照确定好的方法进行测量。对试验数据分析处理后得到各分量的标准不确定度,再算出合成不确定度和扩展不确定度。为后续汽油发动机台架测量的有效功率不确定评定提供参考。

Evaluation Method on Measurement Uncertainty of Net Power of Petrol Engine

The measurement uncertainty has an important eff ect on the performance evaluation of the engine.According to the requirements of the performance test method,the paper determines the component of the uncertainty and the mathematical model.According to bench test data,the standard uncertainty and component uncertainty are calculated in the mathematical model,which will give the reference to engine output power test on engine test bench.