Self-tuning gross heat release computation for internal combustion engines

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title = "Self-tuning gross heat release computation for internal combustion engines",
abstract = "The paper describes a novel method for self-tuning gross heat release computation in internal combustion engines suitable for both online usage in combustion phasing control applications and post-processing of cylinder pressure measurements. The method estimates the polytropic exponents and cylinder pressure offsets immediately preceding and succeeding the combustion event, respectively, using a fast nonlinear least-squares method. The polytropic exponent and the pressure offset are subsequently interpolated during the combustion event and a net heat release computation is performed based on the interpolated exponent and pressure. The result is a self-tuning gross heat release algorithm with no need to model heat losses, crevice losses and blow-by explicitly. (C) 2008 Elsevier Ltd. All rights reserved.",
keywords = "Nonlinear, squares, Least, Estimation, Engine control, Cylinder pressure, Heat release",
author = "Per Tunest{\aa}l",
year = "2009",
doi = "10.1016/j.conengprac.2008.09.012",
language = "English",
volume = "17",
pages = "518--524",
journal = "Control Engineering Practice",
issn = "0967-0661",
publisher = "Elsevier",
number = "4",