Abstract:
The fuel efficiency of a TOYOTA ECHO PLUS-2ZZ-GE-02 model light-duty vehicle was investigated
experimentally based on the wheel alignment system. The light vehicle has been analyzed with the
variation of vehicle speed under three different road pavement conditions. A computerized wheel
alignment machine (Best-5800) was used to measure the wheel alignment condition of the light vehicle.
The experimental results show that the fuel efficiency of the vehicle depends on the state of the road and
the alignment of the wheels. The result also noted that proper wheel alignment and good road pavement
conditions with a recommended speed limit can significantly enhance the safety of suspension system
component life, reduce tire wear, and boosts vehicle mileage and driver satisfaction. The Pearson’s
correlation coefficients (rzy) suggest that vehicle speed and fuel consumption are strongly correlated for
fair and poor pavement conditions, however, a moderate correlation was observed in very poor pavement
conditions.
