Abstract
Modified real world model for estimating evaporative emissions from gasoline vehicles in Japan has been developed. Daily maximum and minimum temperatures at each prefecture were used to estimate the emissions. We have assumed evaporative emissions consist of permeations from fuel tank and piping and breakthrough emissions from canister. Estimated total amount of evaporative emissions was 31337 ton per year and it is 20 % lower than the past estimation. However, it is still higher emitter, emitting almost 5.5 percent of total amount from stationary sources in Japan. Estimated emissions from motorcycles with this model were almost 3000 ton and it will be reduced to 1000 ton by introducing 1 day Diurnal Breathing Loss (DBL) test for type approval tests.
