Sensitivity of diesel engine thermodynamic cycle calculation to measurement errors and estimated parameters |
| |
| Affiliation: | 1. Departamento de Mecánica Aplicada e Ingenierı́a de Proyectos, Universidad de Castilla-La Mancha. Ave. Camilo José Cela s/n. 13071, Ciudad Real, Spain;2. Departamento de Máquinas y Motores Térmicos, Universidad Politécnica de Valencia. II Edificio de Investigación. Campus de Vera. Av. Los Naranjos s/n. 46022, Valencia, Spain;1. School of Urban Construction and Environmental Engineering, Chongqing University, Chongqing 400045, China;2. Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education of China, Chongqing 400044, China;3. Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China;4. College of Mechanical and Power Engineering, Chongqing University of Science & Technology, Chongqing 401331, China;1. Department of Automotive Engineering, State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, PR China;2. China North Vehicle Corporation Ltd., Beijing 100084, PR China |
| |
| Abstract: | The use of thermodynamic models for the calculation of the heat release law from the experimental in-cylinder pressure signal has been a common practice as a way to study the combustion process of internal combustion engines. However, the results of this procedure depend mainly on two factors: the validity of the assumed hypothesis and the quality of the measurement of the experimental parameters (both mean and instantaneous ones) used as input data. In this work a sensitivity study of a thermodynamic diagnostic model is presented, with the objective of evaluating the influence of errors in the measuring techniques or in the estimation of parameters on the main results, such as mean gas temperature, heat release and rate of heat release. In order to eliminate the effect of the uncertainty associated with the combustion process itself, the study focused on motored engine conditions. Otherwise, the effect of the inadequacy of the assumed hypothesis was eliminated by using as input in the diagnostic thermodynamic model the results from a predictive thermodynamic model with the same hypothesis as the diagnostic one, instead of an experimental pressure signal. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
