Evaluating the Dynamic Performance of Passenger Cars Having CNG Cylinders

The most major physical effect imposed on a car due to the 
addition of a CNG cylinder, in addition to the increased sprung 
mass of the car, is the longitudinal and altitudinal 
displacements of the vehicle&rsquos center of mass, which increases 
the vehicle&rsquos under steering, changes its roll stability on turns, 
and increases its moment of inertia around the z axis. Also, the 
altitudinal increase in the vehicle&rsquos center of mass, increases the 
chance of rear axle wheels to lock up, and increases the 
vehicle's risk of instability in severe braking, which is 
undesirable. In this paper, we investigated the effects of the 
increased mass of a CNG cylinder on the main components of 
the vehicle&rsquos performance from a dynamic perspective, and 
then compared the results of the dynamic analysis with those of 
the practical tests. The results of the dynamic analyses were 
consistent with those of the practical tests.