Title: Analysis of NH3 emission characteristics from three-way catalyst cars

Authors: S. Hori, T. Sato, T. Abe

Addresses: Traffic Nuisance Division, Traffic Safety and Nuisance Research Institute, Ministry of Transport, 38-1, 6-chome, Shinkawa, Mitaka-shi, Tokyo 181, Japan. ' Traffic Nuisance Division, Traffic Safety and Nuisance Research Institute, Ministry of Transport, 38-1, 6-chome, Shinkawa, Mitaka-shi, Tokyo 181, Japan. ' Traffic Nuisance Division, Traffic Safety and Nuisance Research Institute, Ministry of Transport, 38-1, 6-chome, Shinkawa, Mitaka-shi, Tokyo 181, Japan

Abstract: From the viewpoint of environmental protection, it has become important to estimate the emission of unregulated material from vehicles and to develop countermeasures which minimise these emissions. Ammonia is one such unregulated material which is emitted from three-way catalyst-equipped passenger cars. Thus, as described in this article, analyses of NH3 emission characteristics were carried out. Through engine and chassis dynamometer tests, the relationship between engine operating conditions and NH3 emission characteristics, as well as the influences of the air-fuel ratio control performance on NH3 emissions, were clarified.

Keywords: air-fuel meter; catalyst; constant volume sampler; conversion efficiency; Federal LA-4 cycle; impinger; indophenol method; ion-electrode method; NH3 emissions; ammonia emissions; vehicle emissions; three-way catalytic converters.

DOI: 10.1504/IJVD.1990.061616

International Journal of Vehicle Design, 1990 Vol.11 No.2, pp.188 - 200

Published online: 26 May 2014 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article