Title: A mean value model for calculating the exhaust temperature drop of an internal combustion engine

Authors: Bo Liu; Kangyao Deng

Addresses: Key Laboratory for Power Machinery and Engineering of Ministry of Education, Shanghai JiaoTong University, 800 Dongchuan Road, Shanghai 200240, China. ' Key Laboratory for Power Machinery and Engineering of Ministry of Education, Shanghai JiaoTong University, 800 Dongchuan Road, Shanghai 200240, China

Abstract: A mean value model for calculating the exhaust temperature drop of an internal combustion engine is developed in this paper, from which a simple general formula is derived. Using the one-dimensional engine simulation software GT-POWER, the pending parameters in the general formula are determined particularly for a two-stroke spark ignition (SI) engine with good correlation and precision. Then the formula is verified by experimental results. The errors between calculated results and experimental data are less than 1% at high speed, and 2% at low speed. Although the error in middle engine speed can reach 8%, this model is appropriate to be used in the engineering applications, such as exhaust system design and turbocharging system match. In addition, this model is simple enough to be embedded into the engine management system. The factors that influence the exhaust temperature drop are also discussed.

Keywords: internal combustion engines; exhaust temperature drop; mean value model; heat transfer; modelling; simulation; two-stroke SI engines; spark ignition; exhaust system design; turbocharging system match; engine management.

DOI: 10.1504/IJVSMT.2011.042391

International Journal of Vehicle Systems Modelling and Testing, 2011 Vol.6 No.2, pp.89 - 101

Received: 15 Jul 2010
Accepted: 05 Dec 2010
Published online: 16 Oct 2014 *

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