The driver of a heavy-duty vehicle with unsynchronized manual transmission has been required to make several precise movements in order to make a ratio change. Driver error during shifting, due to inexperience or carelessness, can cause damage to the transmission which increases maintenance cost. To overcome these problems in an efficient and economical manner, a system of controls has been added to a basic mechanical transmission which will complete the shift at the command of the driver. Electronic logic is used as a controlling media over an electropneumatic shifting system and an electromechanical synchronizing system. The various new components of the system and how they interreact will be presented.


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    Title :

    Electronically Controlled Semi-Automatic Transmissions for Heavy-Duty Trucks


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    1974 Automotive Engineering Congress and Exposition ; 1974



    Publication date :

    1974-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





    AUTOMATIC TRANSMISSIONS IN HEAVY DUTY TRUCKS

    SCHAEFER, R. M. | SAE Technical Papers | 1957


    Automatic transmissions in heavy duty trucks

    Schaeffer, R.M. | Engineering Index Backfile | 1957


    Electronically Controlled Mechanical Automatic Transmission for Heavy Duty Trucks and Buses

    Tanaka,S. / Momiyama,F. / Terasawa,M. et al. | Automotive engineering | 1986


    Electronically Controlled Mechanical Automatic Transmission for Heavy Duty Trucks and Buses

    Momiyama, Fujio / Terasawa, Michitaka / Tanaka, Shigemitsu et al. | SAE Technical Papers | 1986