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Exhaust Backpressure Estimation for an Internal Combustion Engine with a Variable Geometry Turbo Charger
Technical Paper
2009-01-0732
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Exhaust gas recirculation (EGR) is one of the key approaches applied to reduce emissions for an internal combustion engine. Recirculating a desired amount of EGR requires accurately estimating EGR mass flow. This can be calculated either from the gas flow equation of an orifice, or from the difference between charge air mass flow and fresh air mass flow. Both calculations need engine exhaust pressure as an input variable. This paper presents a method to estimate exhaust pressure for a variable geometry turbo charged diesel engine. The method is accurate and simple to fit production ECU application, therefore, saves cost of using a physical sensor.
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Wang, Y. and Gangopadhyay, A., "Exhaust Backpressure Estimation for an Internal Combustion Engine with a Variable Geometry Turbo Charger," SAE Technical Paper 2009-01-0732, 2009, https://doi.org/10.4271/2009-01-0732.Also In
References
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