Self-tuning gross heat release computation for internal combustion engines

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Self-tuning gross heat release computation for internal combustion engines. / Tunestål, Per.

In: Control Engineering Practice, Vol. 17, No. 4, 2009, p. 518-524.

Research output: Contribution to journalArticle

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TY - JOUR

T1 - Self-tuning gross heat release computation for internal combustion engines

AU - Tunestål, Per

PY - 2009

Y1 - 2009

N2 - 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.

AB - 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.

KW - Nonlinear

KW - squares

KW - Least

KW - Estimation

KW - Engine control

KW - Cylinder pressure

KW - Heat release

U2 - 10.1016/j.conengprac.2008.09.012

DO - 10.1016/j.conengprac.2008.09.012

M3 - Article

VL - 17

SP - 518

EP - 524

JO - Control Engineering Practice

JF - Control Engineering Practice

SN - 0967-0661

IS - 4

ER -