A Semi-Empirical Model for Fast Residual Gas Fraction Estimation in Gasoline Engines
2006-01-3236
10/16/2006
- Event
- Content
- Accurate accounting for fresh charge (fuel and air) along with trapped RGF is essential for the subsequent thermodynamic analysis of combustion in gasoline engines as well as for on-line and real-time quantification as relevant to engine calibration and control. Cost and complexity of such techniques renders direct measurement of RGF impractical for running engines.In this paper, an empirically-based approach is proposed for on-line RGF, based on an existing semi-empirical model [1]. The model developed expands the range over which the semi-empirical model is valid and further improves its accuracy. The model was rigorously validated against a well correlated GT-POWER model as well as results from 1D gas exchange model [2]. Overall, using this model, RGF estimation error was within ∼1.5% for a wide range of engine operating conditions. The model will be implemented in Dyno development and calibration at Chrysler Group.
- Pages
- 11
- Citation
- Amer, A., and Zhong, L., "A Semi-Empirical Model for Fast Residual Gas Fraction Estimation in Gasoline Engines," SAE Technical Paper 2006-01-3236, 2006, https://doi.org/10.4271/2006-01-3236.