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Published in:
2009 | OriginalPaper | Chapter
Braking Dynamic Performance
Published in: The Automotive Chassis
Publisher: Springer Netherlands
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The study of braking on straight road is performed using mathematical models similar to those seen in Chapter 23 for longitudinal dynamics. But in this case, the presence of suspensions and the compliance of tires are neglected and the motion is described by the longitudinal equilibrium equation (23.1) alone
(24.1)
$$m\ddot x = \sum\limits_{\forall i} {F_{x_i }}.$$
Apart from cases in which the vehicle is slowed by the braking effect of the engine, which can dissipate a non-negligible power (lower part of the graph of Fig. 22.2), and by regenerative braking in electric and hybrid vehicles, braking is performed in all modern vehicles on all wheels. Subscript
i
thus extends to all wheels or, when thinking in terms of axles, as is usual for motion in symmetrical conditions, on all axles.