关键词: 发动机台架；排放测试；碳平衡；颗粒物

Abstract: Engine bench emission test has strict requirements for test environment, test boundary, test equipment and test methods. This paper will analyze the influence of relevant factors on emission test results from the aspects of engine bench layout, emission equipment and report analysis. Carbon balance method is an important means to verify whether the whole emission test system is normal. This paper discusses the effects of system leakage, delay time and analyzer accuracy on it. The constant volume sampling equipment, filter paper weighing and intercooler which affect the particle test results are analyzed; Find out the failure reason of emission test by comparing the test results and analyzing the real-time data.

Key words: Engine bench; Emission test; Carbon balance; Particle