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Emission and efficiency estimation of hybrid powertrains with continuous Vehicle Specific Power analysis

The high complexity and large number of hybrid vehicle configurations make it difficult to analyse and evaluate the efficiency and emissions of their propulsion systems. This paper presents a novel mathematical formulation for estimating the gains of hybrid powertrain in the form of exhaust emissions and fuel efficiency. According to the defined energy flow diagram, the mathematical formulation of each emission or fuel consumption source is given as a function of the most influential parameter. The input data are obtained by measuring emissions under real driving conditions or on a test bench which are mandatory during vehicle type approval. This approach is suitable for use as a stand-alone method or as part of simulation software.

Hybrid powertrain, Vehicle Specific Power analysis, Life cycle analysis

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