Hot passenger car emissions modelling as a function of instantaneous speed and acceleration
JOUMARD ; JOST ; HICKMAN ; HASSEL
Type de document
COMMUNICATION ORALE SANS ACTES (COM)
Langue
anglais
Auteur
JOUMARD ; JOST ; HICKMAN ; HASSEL
Résumé / Abstract
As part of the ec drive programme, a study was carried out to determine the most important vehicle parameters that influence the emissions and fuel consumption of passager cars. Emission measurements have been conducted in the three laboratories in France, Germany and UK on the basis of 14 driving cycles specially designed to cover the whole range of vehicle speed and acceleration in urban traffic. 150 vehicles, representating the European 1995 fleet, were tested, and the emissions of co, hc, nox and co2 continuously recorded. Subsequently, a model was developed to calculate emissions during an urban trip as a function of the vehicle type and its instantaneous speed and acceleration. Average unit emissions are presented as a function of average speed and vehicle type. The model is given in the form of a two dimentional function with the variables speed and speed times acceleration for all vehicles types. An attempt to test this model with on-board sampling system was made but without success. The paper briefly descibes some typical applications.
