Abstract
The total emissions of NOx, PM, SO2, CO, NMHC, NH3 and CO2 from road vehicles in Japan were estimated for the period of 1980 - 2010. The applied emission model consisted of hot running exhaust emissions, cold start exhaust emissions and evaporative NMHC emissions. The estimated historical changes in the emissions are affected by various historical changes such as changing traffics, increasing number of diesel buses and trucks, temporary prevailing diesel passenger cars, retirement of two reduced stroke minicars, step-by-step reinforcing of emission regulations and corresponding renovations of countermeasures, and sulfur content and lowering of the Reid vapor pressure in fuels. This information about the historical changes in atmospheric emissions is thought to be useful for the data analysis of environmental concentrations, reproduction of the concentrations by simulation models and/or evaluation of its sociological history.
