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2020 | OriginalPaper | Chapter

Directional Stability of a Front Wheel Drive Passenger Car with Preemptive Use of the Direction Sensitive Locking Differential (DSLD)

Authors: Mathias Lidberg, Jonas Alfredson

Published in: Advances in Dynamics of Vehicles on Roads and Tracks

Publisher: Springer International Publishing

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Abstract

The topic of this paper is the bigger picture of vehicle dynamics and handling characteristics of cars, with a focus on driving safety. More specifically, the directional stability gain obtained using the semi-active differential (DSLD) is experimentally verified in transient steering maneuvers using a prototype in a FWD Saab 9-3 Aero.
Stemming from the obvious need to enable low speed maneuvering, the open differential was developed already in the beginning of the automotive era and it has ever since maintained a position as the unquestioned solution almost irrespective of the driving situation. However, due to the inherent compromise between low speed maneuverability and high speed stability in road vehicle design, there are fundamental benefits of locking the differential more or less preemptively during for example expressway driving.
In recent decades electronic stability control (ESC) has become the go-to solution to improve driving safety by increasing the directional stability in transient maneuvers. However, similar but significantly greater stability gains can be accomplished by utilizing controllable differentials. All in all this means that the mentioned inherent compromise between maneuverability and stability can be circumvented and the overall handling characteristics of cars can be fundamentally improved.
Literature
1.
go back to reference Alfredson, J.: Locking differential. United States Patent US 7,654,934B2, 2 February 2010 Alfredson, J.: Locking differential. United States Patent US 7,654,934B2, 2 February 2010
2.
go back to reference Lidberg, M., Alfredson, J.: Control of the direction sensitive differential (DSLD) for front wheel drive passenger car in transient cornering. In: Proceedings of the 21st International Symposium on Dynamics of Vehicles on Roads and Tracks (IAVSD 2009), Stockholm, Sweden, 14–18 August 2009 (2009) Lidberg, M., Alfredson, J.: Control of the direction sensitive differential (DSLD) for front wheel drive passenger car in transient cornering. In: Proceedings of the 21st International Symposium on Dynamics of Vehicles on Roads and Tracks (IAVSD 2009), Stockholm, Sweden, 14–18 August 2009 (2009)
3.
go back to reference Alfredson, J., Lidberg, M.: A method and a system for controlling the stability and yaw response of a vehicle by locking a differential at elevated speeds. Swedish Patent SE 539 607 C2, 17 October 2017 (2017) Alfredson, J., Lidberg, M.: A method and a system for controlling the stability and yaw response of a vehicle by locking a differential at elevated speeds. Swedish Patent SE 539 607 C2, 17 October 2017 (2017)
4.
go back to reference Maeda, T., Irie, N., Hidaka, K., Nishimura, H.: Performance of driver-vehicle system in emergency avoidance. SAE Technical Paper 770130. SAE International, Warrendale, PA, USA (1977) Maeda, T., Irie, N., Hidaka, K., Nishimura, H.: Performance of driver-vehicle system in emergency avoidance. SAE Technical Paper 770130. SAE International, Warrendale, PA, USA (1977)
Metadata
Title
Directional Stability of a Front Wheel Drive Passenger Car with Preemptive Use of the Direction Sensitive Locking Differential (DSLD)
Authors
Mathias Lidberg
Jonas Alfredson
Copyright Year
2020
DOI
https://doi.org/10.1007/978-3-030-38077-9_147

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