Abstract:

The aim of this study is to model fuel consumption according to the speed transitions in such a way that it does not depend on a particular vehicle and motor characteristics and to determine the impact of the speed change strategies on fuel consumption using this model. For modeling fuel consumption according to the Vites transitions, the moment and power characteristic curves of the internal combustion engine are first modeled. Using the engine characteristics obtained and the speed rates of the vehicle, submodels that obtain the vehicle speed, the required check force and the engine's unique fuel consumption for each speed rate have been developed. The fuel consumption has been modeled according to the output of this submodel and the speed transition. The developed model has identified the impact on fuel consumption of two different speeds change strategies based on geometric and progressive series. For this, using these two methods the speed rates were calculated and the fuel consumption curves were obtained according to the speed rates. The reason for the differences according to one of the fuel consumption currents of both strategies has been investigated by check diagrams. The modeling method developed so that the geometry series and progressive directory’s impact on fuel consumption were determined based on the check diagram.

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