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The paper describes procedures for predicting the course of reaction and the onset of autoignition in homogeneous fuel-air mixtures, using detailed chemical kinetic data and considering hydrogen gas as a fuel. Experimental results from both a motored autoigniting engine and a pneumatically driven compression apparatus are then compared with computational predictions. It is shown that, depending on the reliability and completeness of the kinetic scheme employed, reasonably good agreement between computed and observed pressure development records can be obtained.