Abstract
KEYWORDS – Front End Auxiliary Drive, FMEP, Fuel consumption, Belt Tension, Alternator
ABSTRACT
A continuous development to improve fuel efficiency led to optimization of internal combustion engine in the automotive vehicle. For the actual fuel saving, it is necessary to investigate loss of auxiliaries and a belt drive system in a variety of driving status, those are not included in the fuel economy test mode. The systematic investigation on the FEAD [Front End Auxiliary Drive] was done for reducing driving torque to get the better fuel economy. The individual power consumption measurement of main auxiliaries such as alternator and air con compressor was also done after reproducing the actual driving conditions. The study of this paper is two-fold; first, to develop devised ideas for reducing the friction in FEAD without auxiliary load; second, to develop the method to measure the real driving torque in the road for air con compressor and alternator.
A special experiment rig was widely used to assess the FEAD function and energy loss. In the paper, experimental result and applicable ideas were presented after satisfying functional performances. The main finding is that the quantitative amount of power consumption can be reduced after modifying FEAD. The driving torque map of auxiliaries such as air con compressor and alternator were established, to figure out the effect of auxiliaries in fuel economy. The idea inducing lower belt tension and technologies to reduce power consumption can make less fuel consumption on the road.