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International Journal of Automotive Technology > Volume 19(6); 2018 > Article
International Journal of Automotive Technology 2018;19(6): 1091-1101.
ELECTRICALLY ASSISTED INTERNAL COMBUSTION ENGINES: A COMPARATIVE ANALYSIS
Carlo Scaffidi, Salvatore De Caro, Salvatore Foti, Tommaso Scimone, Antonio Testa
University of Messina
PDF Links Corresponding Author.  Salvatore De Caro , Email. sdecaro@unime.it
ABSTRACT
An electrically assisted internal combustion engine is obtained by combining a conventional engine and one or more electrical motors of considerably smaller size. A key feature of such an innovative vehicle hybridization approach is that the torque generated by electric machines is not transmitted to the wheels. The electric motors are, in fact, intended only to assist the internal combustion engine in low efficiency, low performance, or high polluting working conditions. They however, draw extra power and energy from the battery. This paper presents a tool to evaluate different possible solutions in terms of energy balance, efficiency, battery stress and battery ageing. The method, which is based on suitable mathematical models and specific analysis criteria is also exploited to compare eight different configurations of a C-segment vehicle, pointing out limits and capabilities of traditional 12−14 V systems.
Key Words: Battery lifetime, Electric turbo-charger, Fuel saving, Hybridization, Micro-cycles, Vehicle modelization
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