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A two phase, global combustion model has been developed for quiescent chamber, direct injection diesel engines. The first stage of the model is essentially a spark ignition engine flame spread model which has been adapted to account for fuel injection effects. During this stage of the combustion process, ignition and subsequent flame spread/heat release are confined to a mixing layer which has formed on the injected jet periphery during the ignition delay period. Fuel consumption rate is dictated by mixing layer dynamics, laminar flame speed, large scale turbulence intensity, and local jet penetration rate. The second stage of the model is also a time scale approach which is explicitly controlled by the global mixing rate. Fuel-air preparation occurs on a large-scale level throughout this phase of the combustion process with each mixed fuel parcel eventually burning at a characteristic time scale as dictated by the global mixing rate.

The incorporation of semiactive suspension technology into military vehicles is shown to be a win-win proposition. Extensive test results are presented for five comparable pairs of passive and semiactive suspension equipped vehicle configurations. The cross-country ride and platform stability performance for these 19 metric ton tracked vehicles demonstrates the substantial gains achievable with a semiactive suspension. The test results are augmented with simulation results assessing the respective suspension system power losses and evaluating the performance potential achievable by equipping an M2 Bradley Fighting Vehicle with a semiactive suspension system. It is further shown that such a semiactive suspension equipped Bradley will have cross country mobility equivalent to the M1A1 Abrams Main Battle Tank.