This paper deals with the study of the dynamic behavior of a F1 car gear selection hydraulic circuit, when involved in different shift transients.In the first part of the paper the actual circuit is described, and the main hypotheses adopted for the numerical modeling of the hydraulic power unit, of the control valves, of hydraulic pipes and of the actuators involved in the gear shift cycles are introduced. Particular attention is devoted to the actuators actual sequences, as applied by the Electronic Control Unit (ECU) to the servo-valves deputed to actuators control. The strategy to define each gear shift cycle in terms of actuators working position in time domain is chosen, using the frequency map of each servo-valve.A numerical vs. experimental comparison of the behavior of the actuators involved in the gear selection (during about 50 ms for an up shifting and 100 ms for a down shifting) is performed, with the target to define the validity limits of the numerical model results.Finally, the paper reports the analysis of those hydraulic variables not controlled by the on board diagnostic, with the aim to analyze the behavior of the power unit and of the pipes when submitted to the sudden hydraulic power request correspondent to a gear shift.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Analysis of a F1 Car Hydraulic Circuit Dynamic Behavior


    Additional title:

    Sae Technical Papers


    Contributors:
    Borghi, M. (author) / Flandoli, M. (author) / Milani, M. (author) / Piraccini, M. (author)

    Conference:

    SAE 2001 World Congress ; 2001



    Publication date :

    2001-03-05




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Analysis of a F1 car hydraulic circuit dynamic behavior

    Borghi,M. / Milani,M. / Piraccini,M. et al. | Automotive engineering | 2001


    2001-01-1162 Analysis of a F1 Car Hydraulic Circuit Dynamic Behavior

    Borghi, M. / Milani, M. / Piraccini, M. et al. | British Library Conference Proceedings | 2001


    Dynamic Simulation and Analysis System for Electro-Hydraulic Circuit

    Hara, Keiichi / Oniuda, Kouichi / Iida, Satoshi | SAE Technical Papers | 1992


    Dynamic simulation and analysis system for electro-hydraulic circuit

    Iida,S. / Hara,K. / Oniuda,K. et al. | Automotive engineering | 1992


    Hydraulic dynamic analysis

    Gale, R. L. / Nease, A. W. / Nelson, D. J. | NTRS | 1978