Evaluating the Dynamic Performance of Passenger Cars Having CNG Cylinders

摘要

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's center of mass, which increases the vehicle's 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's 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's 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.