Development of a Simulation based Powertrain Design Framework for Evaluation of Transient Soot Emissions from Diesel Engine Vehicles.

[摘要] This dissertation presents the development of a modeling and simulation frameworkfor diesel engine vehicles to enable soot emissions as a constraint in powertrain designand control. To this end, numerically efficient models for predicting temporallyresolvedtransient soot emissions are identified in the form of a third-order dual-inputsingle-output (DISO) Volterra series from transient soot data recorded by integratingreal-time (RT) vehicle level models in Engine-in-the-loop (EIL) experiments. It isshown that the prediction accuracy of transient soot significantly improves over thesteady-state maps, while the model remains computationally efficient for systemslevelwork.The evaluation of powertrain design also requires a systematic procedure for dealingwith the issue that drivers potentially adapt their driving styles to a given design. Inorder to evaluate the implications of different powertrain design changes on transientsoot production it is essential to compare these design changes on a consistent basis.This problem is explored in the context of longitudinal motion of a vehicle following a standard drive-cycle repeatedly. This dissertation develops a proportional-derivative(PD) type iterative learning based algorithm to synthesize driver actuator inputs thatseek to minimize soot emissions using the Volterra series based transient soot models.The solution is compared to the one obtained using linear programming. Resultsshow that about 19% reduction in total soot can be achieved for the powertrain designconsidered in about 40 iterations.The two contributions of this dissertation: development of computationally efficientsystem level transient soot models and the synthesis of driver inputs via iterativelearning for reducing soot, both contribute to improving the art of modeling andsimulation for diesel powertrain design and control.

[发布机构] University of Michigan

[效力级别] Transmission Modeling

[关键词] Transient Soot Modeling;Transmission Modeling;Engine-in-The-loop;Driving Algorithm;Vehicle Modeling;Real-time Models;Mechanical Engineering;Engineering;Mechanical Engineering