ITEMS

modern scholarly publishers in the finest tradition

Journals

	Search

Clean Air: International Journal on Energy for a Clean Environment

ISSN for PRINT: 1561-4417

Institutional price:	$451.00
Issues per year:	4

Best Paper Award Selection - Editorial Board Site

2005, Volume6

99 pages

DOI: 10.1615/InterJEnerCleanEnv.v6.i1

Issue price - $108.00

MOBILE EMISSION MEASUREMENTS FOR ASSESSING LOW EMITTING VEHICLES EXEMPLIFIED ON A CRT-EQUIPPED BUS

G. Lenaers
Vito — Flemish Institute for Technological Research, Vehicle Technology, Mol, Belgium

M. Van Poppel
Vito — Flemish Institute for Technological Research, Vehicle Technology, Mol, Belgium

ABSTRACT

An on-board system capable of determining ppm level emissions of carbon monoxide (CO), total hydrocarbons (THC), and nitrogen oxides (NO_x) is developed. The data acquisition allows for the simultaneous retrieval of engine and vehicle parameters to calculate on-line mass based time resolved emissions that can be quickly linked to relevant parameters of the emission control system. The on-board system is validated by 160 comparative measurements on three Constant Volume Sampling (CVS) chassis dynamometers. The tests are executed on a Heavy Duty diesel truck and on three modern Light Duty vehicles. The differences in emissions are generally below 10% until 0.02 g/km. A real life performance evaluation is executed on a Eminox/Johnson Matthey Continuous Regenerating Trap (CRT) equipped VanHool A308 city bus. All tests are performed with, and without, CRT. The CRT reduces, almost eliminating, PM emissions to over 90% CO and THC to over 85%. It is found that the resulting THC ppm concentrations yield mass emissions as low as 0.03 g/km. No significant effect of fuel sulphur content was found in the tests without CRT.