The Advanced Light-Duty Powertrain and Hybrid Analysis (ALPHA) tool was created by EPA to estimate greenhouse gas (GHG) emissions from light-duty (LD) vehicles [1]. ALPHA is a physics-based, forward-looking, full vehicle computer simulation capable of analyzing various vehicle types combined with different powertrain technologies. The software tool is a MATLAB/Simulink based desktop application. In order to model the behavior of current and future vehicles, an algorithm was developed to dynamically generate transmission shift logic from a set of user-defined parameters, a cost function (e.g., engine fuel consumption) and vehicle performance during simulation.This paper presents ALPHA's shift logic algorithm and compares its predicted shift points to actual shift points from a mid-size light-duty vehicle and to the shift points predicted using a static table-based shift logic as calibrated to the same vehicle during benchmark testing. An explanation of, and a process for tuning, the user defined parameters is presented and example applications of the algorithm in transmission and engine sensitivity studies are described.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Development and Testing of an Automatic Transmission Shift Schedule Algorithm for Vehicle Simulation


    Additional title:

    Sae Int. J. Engines


    Contributors:

    Conference:

    SAE 2015 World Congress & Exhibition ; 2015


    Published in:

    Publication date :

    2015-04-14


    Size :

    11 pages




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Development and testing of an automatic transmission shift schedule algorithm for vehicle simulation

    Newman,K. / Kargul,J. / Barda,D. et al. | Automotive engineering | 2015


    Optimal Efficiency Shift Schedule of Automatic Transmission for Construction Vehicle

    Kang, Huai-Liang / Gong, Jie / Zhao, Ding-Xuan et al. | Tema Archive | 2012


    Optimal Efficiency Shift Schedule of Automatic Transmission for Construction Vehicle

    Kang, Huai Liang ;Gong, Jie ;Zhao, Ding Xuan | Trans Tech Publications | 2012


    Automatic transmission shift schedule control using fuzzy logic

    Yamaguchi,H. / Narita,Y. / Takahashi,H. et al. | Automotive engineering | 1993


    Automatic Transmission Shift Schedule Control Using Fuzzy Logic

    Takahashi, Hiroshi / Yamaguchi, Hiroshi / Narita, Yasushi et al. | SAE Technical Papers | 1993