A Mean-Value Model for Estimating Exhaust Manifold Pressure in Production Engine Applications

2008-01-1004

04/14/2008

Event
SAE World Congress & Exhibition
Authors Abstract
Content
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.
Meta TagsDetails
DOI
https://doi.org/10.4271/2008-01-1004
Pages
9
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.
Additional Details
Publisher
Published
Apr 14, 2008
Product Code
2008-01-1004
Content Type
Technical Paper
Language
English