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A Mean-Value Model for Estimating Exhaust Manifold Pressure in Production Engine Applications
Technical Paper
2008-01-1004
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A key quantity for use in engine control is the exhaust manifold pressure. For production applications it is an important component in the calculation of the engine volumetric efficiency, as well as EGR flow and residual fraction. For cost reasons, however, it is preferable to not have to measure the exhaust manifold pressure for production applications. For that reason, it is advantageous to develop a model for estimating the exhaust manifold pressure in production application software that is small, accurate, and simple to calibrate.
In this paper, a mean-value model for calculating the exhaust manifold pressure is derived from the compressible flow equation, treating the exhaust system as a fixed-geometry restriction between the exhaust manifold and the outlet of the tailpipe. Validation data from production applications is presented.
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Citation
Olin, P., "A Mean-Value Model for Estimating Exhaust Manifold Pressure in Production Engine Applications," SAE Technical Paper 2008-01-1004, 2008, https://doi.org/10.4271/2008-01-1004.Also In
References
- Heywood, J.B. “Internal Combustion Engine Fundamentals,” McGraw-Hill 1988
- Maloney, P. J. Olin P.M. “Pneumatic and Thermal State Estimators for Production Engine Control and Diagnostics,” SAE 980517 1997
- Olin, P. M. Maloney P. J. “Barometric Pressure Estimator for Production Engine Control and Diagnostics,” SAE 1999-01-0206 1999
- Müller, M. “Estimation and Control of Turbocharged Engines,” SAE 2008-01-1013 2008