Driving Dynamic Performance
Part of the
Mechanical Engineering Series
book series (MES)
When computing the performance of a vehicle in longitudinal motion (maximum speed, gradeability, fuel consumption, braking, etc.), the vehicle is modelled as a rigid body, or in an even simpler way, as a point mass.
The presence of suspensions and the compliance of tires are then neglected and motion is described by a single equation, the equilibrium equation in the longitudinal direction. If the x
-axis is assumed to be parallel to the ground, the longitudinal equilibrium equation reduces to
are the various forces acting on the vehicle in the longitudinal direction (aerodynamic drag, rolling resistance, traction, braking forces, etc.).
KeywordsFuel Consumption Aerodynamic Drag Gear Ratio Transmission Ratio Rolling Resistance
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© Springer Science+Business Media B.V. 2009