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In recent times, automobile scientists have focused a lot upon the
fuel economy and energy conservation in motor vehicles. The
search for alternate fuels and the minimization of thermal and
mechanical losses in motor engines has been a major topic of
research for the past several decades. In an automobile, one of the
most complicated systems in terms of mechanical losses is the
engine valve train. Several theoretical and experimental models
have been used to calculate the losses in engine valve train and
the effect of various engine parameters on the frictional losses.
The work presented in this article focuses upon the drive and
friction torque values for four different commercially available
oils of the same grade i.e., 10W-40. These oils are Shell, Castrol,
Kixx and ZIC. The tests are carried out on a Suzuki swift RS413
gasoline engine cylinder head. The variation in drive and friction
torques with oil temperature and camshaft speed is presented. The
results show the comparisons of these four oils for the drive and
friction torque values and based on these results, conclusions are
given regarding the best oil in terms of friction performance of
the given engine valve train. It is thus concluded in this thesis that
Kixx is the oil with the least value of average friction torque for
the given experimental conditions and is therefore the best one
among the four oils compared.