Technical Paper

Authors: G. P. Blair, D. O. Mackey, M. C. Ashe, G. F. Chatfield
Title: On Improving the Accuracy of the Simulation of Reciprocating Engines
Date: November 1-2, 2000
Published: International Conference on Computational and Experimental Methods in Reciprocating Engines, IMechE - C587/001/2000

This paper emphasizes the need to simulate with great precision the geometry of engines and their ducting if accuracy of correlation with performance characteristics and with measured pressure diagrams is to be expected. A high-performance, single-cylinder, motocross motorcycle engine of 400 cm3 capacity is instrumented and the performance characteristics are measured over a wide speed range as well as pressure diagrams in the intake and exhaust systems. These measurements are correlated with the theoretical results given by a sophisticated 1D engine simulation package. The modeling of the absorption silencer attached to this engine is studied in detail.

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