Experimental evidence shows that a self-excited vibration may appear during braking manoeuvres performed by road-racing motorcycles. It involves vertical oscillation of front and rear wheel axles as well as angular oscillation of the driveline in a frequency range between 17 and 22 Hz. As a consequence, severe oscillations of the tyre-ground vertical loads can be observed, leading to a loss of grip and ultimately weakening the vehicle overall performance. Several contributions on this topic can be accounted for in the literature; however, a comprehensive description of the phenomenon has not been given yet. The present work is aimed at simulating the above vibration with a planar multibody motorcycle model, and then at analyzing its driving mechanism. Stability maps are drawn for time-invariant braking manoeuvres, and validated with respect to time domain simulations.

Driveline instability of racing motorcycles in straight braking manoeuvre / Leonelli, Luca; Cattabriga, Stefano; Sorrentino, Silvio. - In: PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS. PART C, JOURNAL OF MECHANICAL ENGINEERING SCIENCE. - ISSN 0954-4062. - 232:17(2018), pp. 3045-3061. [10.1177/0954406217730093]

Driveline instability of racing motorcycles in straight braking manoeuvre

CATTABRIGA, STEFANO;SORRENTINO, Silvio
2018-01-01

Abstract

Experimental evidence shows that a self-excited vibration may appear during braking manoeuvres performed by road-racing motorcycles. It involves vertical oscillation of front and rear wheel axles as well as angular oscillation of the driveline in a frequency range between 17 and 22 Hz. As a consequence, severe oscillations of the tyre-ground vertical loads can be observed, leading to a loss of grip and ultimately weakening the vehicle overall performance. Several contributions on this topic can be accounted for in the literature; however, a comprehensive description of the phenomenon has not been given yet. The present work is aimed at simulating the above vibration with a planar multibody motorcycle model, and then at analyzing its driving mechanism. Stability maps are drawn for time-invariant braking manoeuvres, and validated with respect to time domain simulations.
2018
28-set-2017
232
17
3045
3061
Driveline instability of racing motorcycles in straight braking manoeuvre / Leonelli, Luca; Cattabriga, Stefano; Sorrentino, Silvio. - In: PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS. PART C, JOURNAL OF MECHANICAL ENGINEERING SCIENCE. - ISSN 0954-4062. - 232:17(2018), pp. 3045-3061. [10.1177/0954406217730093]
Leonelli, Luca; Cattabriga, Stefano; Sorrentino, Silvio
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1146682
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