Abstract
The effects of the modification of hybrid vehicle components on diesel exhaust emissions were investigated in this study. We examined the changes in exhaust emissions and the fuel consumption (FC) caused by the modification of generator (alternator) and motors. Exhaust emissions such as black carbon (BC), HC, <TEX>$NO_X$</TEX> and <TEX>$C</TEX><TEX>O_2$</TEX> were measured not only in idle state but also on an actual urban road as well as on a chassis dynamometer. BC, <TEX>$NO_X$</TEX> and HC emissions increased by 95%, 27% and 34% respectively when the generator charged the battery in the idle condition. BC and FC decreased in hybrid mode on the actual urban road partly because the motors were used to assist the diesel engine. In addition, the decreases in exhaust emissions and FC were also evident in the hybrid mode when the vehicle was tested on the chassis dynamometer.
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