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- W888678777 abstract "A zero-dimensional model for simulation the performance of a four-stroke direct-injection (DI) diesel engine is developed. The simulation model includes detailed sub-models for fuel burning rate, combustion products, thermodynamic properties of working fluid, heat transfer, fluid flow, and both soot and NOx formation mechanisms. To validate the model, comparisons between experimental and predicted results for different engines, operating under different conditions were conducted. Comparisons show that there is a good concurrence between measured and predicted values. An optimization analysis is conducted for seeking an optimum variation of compression ratio to achieve pre-set objective target of constant maximum brake torque. The optimization analysis is performed under the constrain that the maximum pressure and temperature inside the cylinder not exceed the maximum allowable pressure and temperature of the conventional engine (constant compression ratio, rc).Varying compression ratio is optimized with the previous condition. Results indicated that optimum brake torque is achieved when the value of, rc, ranged between 16.4 and 19.3, where the brake specific fuel consumption, bsfc, and soot emission are reduced by about 4.6% and 12 %, respectively. Furthermore, the brake torque is increases by about 5.4%; NOx, maximum pressure (pmax) , and maximum temperature (Tmax) are increased by about 90.7 %, 10.3% and 3.6 %, respectively." @default.
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- W888678777 date "2012-01-01" @default.
- W888678777 modified "2023-09-24" @default.
- W888678777 title "Zero-dimensional model for a 4-stroke, direct injection, variable compression ratio for maximum torque" @default.
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