A Comparative Study on Performance of Conventional and Series Hybrid Power Train for Passenger Car in Taxi Service

Abstract

The main objective of the study presented in this paper was to perform a comparison of a conventional power train system (CPS) with a diesel engine and a series hybrid electric power train system (SHEPS) and analyse the feasibility of the implementation of hybrid power train in taxi service. Development software package AMESim was used to create detailed mathematical models of a passenger car powered by conventional high-tech Common-Rail supercharged CI engine and a SHE power train system based on the same type of CI engine. The vehicle used to perform the comparative numerical study was set as a C-segment passenger car which is intended to be applied as taxi service vehicle. Simulation of both vehicle power train systems has been accomplished on the basis of New European Driving Cycle (NEDC), the custom, purposely extended NEDC for battery configuration and charging system evaluation and real driving cycles, which were obtained experimentally. Simulation models were applied in order to conduct parametric analysis and investigate battery charging strategy and its influence on performance, fuel economy and emission of the SHEPS compared to CPS. The reduction of 20 - 60% of total fuel consumption was observed in case of SHEPS. Accordingly, total exhaust gas emissions are reduced as well.