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This paper reports on a theoretical investigation of the transient response of a turbocharged and intercooled diesel engine. A comprehensive computer program has been written to simulate the performance characteristics of the several elements of the engine in order to study the operating characteristic of the total system. Numerical solutions of the influence of the thermal effects of some components on the transient processes of the engine have been determined. The potential of the simulation is illustrated by predictions of the engine transient performance in the standard build condition and also with changes in component design and performance.

A comprehensive computer simulation has been developed to predict the transient performance of a rotary engine. An adiabatic throttling process has been assumed to account for crevice leakage. The simulation has been tuned to fit experimental data obtained from tests upon a NORTON NR 601 engine. The potential of the model as an aid to engine design and development is illustrated by means of predictions of the effects of changes in some of the design parameters.

A comprehensive computer simulation has been developed to predict the transient performance of a spark ignition engine. The model has been tuned to fit experimental data obtained from tests upon a FORD SIERRA engine. The potential of the model as an aid to engine design and development is illustrated by means of predictions of the effects of changes in moment of inertia and ignition advance.