Three-dimensional simulation techniques for application to internal combustion (IC) engines have progressed rapidly in recent years, due in part to further advances in computer performance. Such simulation techniques are now being used extensively in R&D work on IC engines, including analyses of in-cylinder gas flow, mixture distribution and other aspects. Research on techniques for predicting combustion phenomena in spark-ignition engines has also been increasing, and the possibility of developing an engine without conducting any experiments and using only a computer-based 3-D virtual engine is becoming increasingly more feasible. This paper describes the present status and future oudook for a 3-D virtual engine that is capable of predicting the combustion performance of an engine under development, including its knock and emission performance.
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