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Evaluation Criteria for AWD Vehicles System Analysis
Technical Paper
2004-01-2086
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Handling behaviour is a very important aspect of modern cars, which need to reach high levels of lateral acceleration maintaining good stability and driveability. The presence of an AWD powertrain changes the response of the vehicle and then it is very important to qualify the car behavior in terms of perceived performances through objective indexes. The paper presents the development of evaluation criteria for AWD vehicles objective assessment; simulation tools and SW standard procedure has been optimised for AWD performances virtual evaluation and different architectures (locking, self-locking, visco-coupling, active differentials) are compared in terms of longitudinal, lateral and cross-coupling dynamics performances. Through the proposed methods it is possible to make vehicle system analysis using simulation model and standard procedures to classify different AWD architectures. It is also a powerful tool for target setting-deployment-achieving in order to traduce AWD vehicle performance in terms of architecture choice and component specifications. The same criteria could be used to support control strategies development and on road AWD systems experimental tuning through simulation analysis. In the paper the application of the method to a virtual upgrade of the Alfa Romeo car is also described: the AWD layouts of interest have been simulated on the virtual car, as a support to the choices of a new Fiat platform.
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Citation
Borio, P., Delcaro, U., Frediani, S., Ricci, C. et al., "Evaluation Criteria for AWD Vehicles System Analysis," SAE Technical Paper 2004-01-2086, 2004, https://doi.org/10.4271/2004-01-2086.Also In
SAE 2004 Transactions Journal of Passenger Cars: Mechanical Systems
Number: V113-6; Published: 2005-07-05
Number: V113-6; Published: 2005-07-05
References
- Data, S. Frigerio, F. Objective evaluation of handling quality Proc. Instn Mech. Engrs, Part D: Journal of Automobile Engineering 2002 216 D4 297 306
- ISO 4138 Road Vehicles - Steady state circular test procedure
- ISO 7401 Road Vehicles - Lateral transient response test method
- ISO 3888-1 Road Vehicles - Test procedure for a severe lane change manoeuvre
- Avenatti R. Campo S. Ippolito L. “A rear active differential: Theory and practice of a new type of controlled splitting differential and its impact on vehicle behaviour” GPC '98 Detroit Ottobre 1998
- ISO 9816 Passangers cars - Power-off reactions of a vehicle in a turn - Open-loop test method