NONMETHANE HYDROCARBON COMPOSITION OF CAR EXHAUST IN HUNGARY

A one-day tunnel experiment was performed in downtown Budapest to meas ure the average nonmethane hydrocarbon composition of the exhaust of t he Hungarian car fleet. It was found that the exhaust is richer in gas oline-originated alkanes in Hungary than in the United States of Ameri ca For which data for comparison were available. This phenomenon may b e caused by the extended usage of cars equipped with two-stroke engine s and by the lower efficiency of the engines in general but the effect of the different composition of the gasoline cannot be excluded eithe r.