Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux

Type de document

COMMUNICATION AVEC ACTES INTERNATIONAL (ACTI)

Langue

anglais

Auteur

BADIN ; JEANNERET ; TRIGUI ; HAREL ; ROUMEGOUX ; JULLIEN ; PERIOT ; D'USSEL

Résumé / Abstract

Hybrid drive trains are one potential alternative to reduce energy consumption and pollutant emissions from public transport vehic1es. The objectives set in a number of programmes and the vehic1emeasurement results obtained nevertheless indicate significant discrepancies in terms of energy consumption. In the aim of providing objective elements of evaluation, INRETS, in co-operation with Alstom and SAFT, carried out a simulation study to assess the performance of a series hybrid drive train installed on a bus. The simulated vehic1e consists of an Alstom drive train equipped with electric in-wheel motors, used in the diesel electric bus and trolleybus projects conducted jointly with Renault VI. The hybrid vehicle studied was fitted with a Lithium-Ion battery developed by SAFT. Vehicle simulations were performed under real operating conditions of a bus route in a French city, considering a 50% and a 100% occupancy rate. Several IC engine management laws were tested, under steady or regulated power conditions, and inc1uding or not zero emission zones. The results recorded substantially depend on the energy management laws applied and on the occupancy rate. The simulations show that the best results are obtained with steady engine operating conditions, which can be considered as a problem in terms of battery constraints (ageing) and sound nuisances when the vehicule is at stop. An energy gain of about 15% could be reached. These values should be corroborated by in-progress studies into power battery ageing and IC engine behavior (chemical pollutant and noise emissions). Keywords: bus, energy consumption, hybrid strategy, lithium ion, series REV, simulation, wheel hub motor.