Department of Mechanical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad (FUM) campus, Azadi Sq., P.O. Box: 9177948974, Mashhad, Khorasan Razavi, Iran
Automotive emission is becoming a critical
threat to today’s human health. Many researchers are
studying engine designs leading to less fuel consumption.
Gearbox selection plays a key role in an engine design. In
this study, Taguchi quality engineering method is
employed, and optimum gear ratios in a five speed gear box
is obtained. A table of various gear ratios is suggested by
design of experiment techniques. Fuel consumption is
calculated through simulating the corresponding combustion
dynamics model. Using a 95 % confidence level,
optimal parameter combinations are determined using the
Taguchi method. The level of importance of the parameters
on the fuel efficiency is resolved using the analysis of
signal-to-noise ratio as well as analysis of variance.