Development of an Estimation Model for NOx Emissions Considering the Travel Modes of a Vehicle

Current models for estimating the amount of NOx emissions use a variable of the average speed of a vehicle for a specific length of time or have variables of a vehicle's speed and acceleration at just times. The former does not describe the difference in the amount of emissions between open roa...

Full description

Saved in:
Bibliographic Details
Published inJournal of Japan Society for Atmospheric Environment / Taiki Kankyo Gakkaishi Vol. 40; no. 4; pp. 137 - 147
Main Authors KASHIMA, Shigeru, YOKOTA, Hisashi, KOKURYO, Kazuo
Format Journal Article
LanguageEnglish
Japanese
Published Japan Society for Atmospheric Environment 2005
Subjects
Automotive Exhausts
Environmental impact
NOx emissions
Travel modes
Trip Segment
Online AccessGet full text

Cover

More Information
Summary:Current models for estimating the amount of NOx emissions use a variable of the average speed of a vehicle for a specific length of time or have variables of a vehicle's speed and acceleration at just times. The former does not describe the difference in the amount of emissions between open road driving, congested driving, or stop and go driving. On the other hand, the latter makes it difficult to aggregate the amount of emissions for a specific length of road. This research shows that it is possible to create a model to solve these existing issues with current emission models by proposing models with more intermediate details. In this model, the trip segment is defined as the period between a vehicle's starts points: from when it begins moving for the first time to when it begins moving for the second time and it is used to estimate the amount of NOx emissions. In the estimation, nine variables, travel time of the four trip modes (acceleration, cruising, deceleration, idling), average acceleration in acceleration mode, and average speed of the four trip modes are used to make the estimates. The accuracy of this method is high (the coefficient of determination is over 0.85).
ISSN:1341-4178
2185-4335
DOI:10.11298/taiki1995.40.4_137