The development of a vehicle and road load sumulation for an engine dynamometer intended for emissons testing and powertrain development

摘要

This dissertation documents the development and evaluation of a vehicle and road loadudsimulation program for an engine dynamometer intended for emissions testing and powertrainuddevelopment. The document summarizes the reviewed vehicle emissions testing,udengine testing and test equipment documentation, as part of the conducted literatureudstudy. It continues to describe the existing dynamic test cell at Cape Advanced Engineeringudused for the development and evaluation of the described system as well as the changesudthat were implemented to the test cell to enable full transient vehicle simulation. Theuddevelopment of an offline simulation model, a preprocessing simulation model and realudtime hardware in the loop simulation model are discussed. The progression made from oneuddeveloped model to the next as well as the reasons for the progression are stated anduddiscussed. The evaluation process of the hardware in the loop model as well as theudconducted evaluation by the simulation of the European Communities Transient Test Cycleudis discussed and the derived simulation accuracy of 7% based on fuel consumption over theudduration of the test cycle is documented. Improvements made to the simulation modeludduring the evaluation and the vehicle and power-train effective rotational inertia that wasudused in the model are reviewed and their effects discussed. Fields of application as well asudfuture recommendations to the derived system are provided.