Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Mechanical efficiency determination of a Dedicated Hybrid Transmission using graph and screw theories: a case study
Submission Author:
Marina Baldissera de Souza , SC , Brazil
Co-Authors:
Rodrigo de Souza Vieira, Daniel Martins, Humberto Cazangi, Luis Paulo Laus, Marina Baldissera de Souza
Presenter: Marina Baldissera de Souza
doi://10.26678/ABCM.COBEM2017.COB17-0405
Abstract
Hybridization is a promising solution to reduce regulated emissions without compromising fuel consumption, what makes the development of transmission systems for Hybrid Electric Vehicles a relevant and prolific study field. Inside this scenario, one new transmission category emerges: the Dedicated Hybrid Transmission (DHT), which includes transmission systems that use at least two sources of propulsion, an internal combustion engine (ICE) and at least one electric motor (EM), and whose functionality depends on both propulsion sources. One important aspect to be studied is the gear trains’ mechanical efficiency of DHTs. In this paper, a DHT available on the market was selected as a case study. In order to determine the gear set efficiency for each driving mode, graph and screw theories and the Kirchhoff laws were applied, through an electromechanical analogy where the friction losses are taken into account by considering them analogues of the electrical resistance. The objective is to determine the most efficient driving mode and to identify the features in the transmission’s topology which compromise the global efficiency.
Keywords
Efficiency, Automotive transmission, Hybrid electric vehicles, Graph and screw theories, Electromechanical analogy
