A study on the stability of a motorcycle wheel–swingarm suspension with chain transmission

Sorrentino, Silvio; Leonelli, Luca

doi:10.1080/00423114.2017.1319962

Cited by 9 publications

(16 citation statements)

References 5 publications

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“…The results of the analysis carried out with the multibody motorcycle model are compared with those of the simplified linearized model proposed by Sorrentino and Leonelli. 6 The latter is a rear motorcycle suspension model with 2-DoFs (rear wheel angular and vertical displacements), travelling at constant imposed speed under the action of chain transmission and tyre ground forces (longitudinal and vertical). These two models present relevant differences; nevertheless the resulting unstable behaviours appear to be closely related.…”

Section: Stability Thresholdmentioning

confidence: 99%

“…In this application, particular attention should be paid when assessing the structural parameters of the transmission model, since it has been found that the associated mode may become unstable causing chatter. 4–6 As a consequence, the total stiffness of the spring k tot is evaluated considering the chain (subscript c ) disposed in series with the sprocket torsional shock absorber (subscript ws ) …”

Section: Model Descriptionmentioning

confidence: 99%

“…On the other hand, Cossalter et al 1,4,5 found that the driveline mode can become unstable during a straight running braking manoeuvre, due to interaction between chain and rear tyre. Finally, Sorrentino and Leonelli 6 proved that the actual values assumed by the rear tyre slip stiffness during a braking manoeuvre may yield instability in the driveline mode of a simplified planar model.…”

Section: Introductionmentioning

confidence: 99%

“…Eigenvalue analysis is then applied to the resulting time-invariant system, and stability maps are drawn (Stability threshold section). Finally, the results of the analysis of the multibody model are compared and discussed with respect to those of the simplified linear 2 degrees of freedom (DoFs) model presented by Sorrentino and Leonelli 6 (Comparison with a simplified model section).…”

Section: Introductionmentioning

confidence: 99%

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Driveline instability of racing motorcycles in straight braking manoeuvre

Leonelli

Cattabriga

Sorrentino

2017

Proceedings of the Institution of Mechanical Engineers, Part C:

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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

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Section: Stability Thresholdmentioning

confidence: 99%

Section: Model Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Driveline instability of racing motorcycles in straight braking manoeuvre

Leonelli

Cattabriga

Sorrentino

2017

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Thus, in the paper [11] there are experimental investigations regarding the chain transmission defects from a Bucket wheel excavator. In the paper [12], a simplified model of a motorcycle rear suspension with the chain transmission is proposed and its stability in equilibrium configurations is studied through eigenvalue analysis. In his paper, Jula [13,14] analyses some aspects concerning the chain transmissions.…”

Section: Introductionmentioning

confidence: 99%

Actions to increase the reliability of the chain transmissions

Ghimişi

Nicula

2018

MATEC Web Conf.

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Correct analysis of a malfunction is a very important step in the remediation process of a product. It is necessary to have a clear vision, especially to determine the cause of the malfunction, although sometimes it can be masked by other defects. Quality Management offers many classic and modern tools to help find solutions that ensure quality improvement. This paper presents a modern method of quality management, called the tree diagram, applied to the issue of increasing the reliability of the chain transmissions. The advantage of using this chart is that it offers the possibility of logically and chronologically examining the objectives and actions that solve a quality or non-quality problem. In the proposed case study, the overall objective is to increase the reliability of the chain transmissions. Specific objectives are set and for each specific objective, we identify potential solutions that can be adopted. For the proposed general objective, the following three specific objectives have been identified: Reduction of chain wheel wear and chain joints, Ensuring proper fitting, Adoption of optimal chain tensioning solutions. On the basis of the presented measures, the tree diagram was made on three levels. The tree chart made outlines the relationship between the overall goal pursued and the actions taken to achieve them. This tool can be used in planning and solving quality assurance problems in the case of the chain transmissions.

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