Abstract
The ambient conditions in the emission measurement test procedure for light duty vehicles are defined as an almost constant temperature (23 deg C) and humidity (50%RH). However, in the real driving situation, the temperature and humidity are widely dispersed. Therefore, several couples of temperature and humidity conditions were adopted for the emission measurements and the correction methods were considered in the previous study. In this study, the considered methods were applied to the emission results of a driving test. As the result, the correction factor for the exhaust emission during the driving test was calculated as around 1.05. It has corrected the basic nature of exhaust emissions from engines. Thus, it is necessary to correct the effects caused by the engine control related to the surrounding temperature and humidity, as a next task.
