An investigation on the sequential turbocharging (ST) of a Kelvin TFSC6 medium speed diesel engine developing 320 kW at 1200 r/min is reported in this paper. The sequential turbocharging (ST) system, utilising turbochargers of unequal size, resulted in significant improvement when compared with previously designed systems. The engine test results show that the new ST system improves the engine performance at both high and low speeds except, at or near to, the ‘transfer’ speed. The engine low speed performance is improved with fuel saving of up to 7 g/kwh for the 1st sequence. However, the improvement of the high engine speed performance at the 2nd sequence was limited by some boost air leakage from a flexible connecting pipe from the peak unit compressor outlet to the intercooler inlet. An optimised sequence transfer control mode is also proposed in this research. Two control valves designed for this ST system, one at the peak unit turbine inlet and the other at the compressor outlet, work very well during the engine test period


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    Title :

    Investigation on a Computer Controlled Sequential Turbocharging System for Medium Speed Diesel Engines


    Additional title:

    Sae Technical Papers


    Contributors:
    Yang, J. (author) / Campbell, T. (author) / Ren, Z. (author)

    Conference:

    SAE Earthmoving Industry Conference & Exposition ; 1998



    Publication date :

    1998-04-08




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Investigation on a computer controlled sequential turbocharging system for medium speed diesel engines

    Ren,Z. / Campbell,T. / Yang,J. et al. | Automotive engineering | 1998



    Turbocharging high speed, high output diesel engines

    Reiners, N.M. / Woollenweber, W.E. | Engineering Index Backfile | 1956


    Turbocharging automotive diesel engines

    Lohr,F.W. / Opel,Ruesselsheim,DE | Automotive engineering | 1989


    TURBOCHARGING HIGH SPEED, HIGH OUTPUT DIESEL ENGINES

    REINERS, N. M. / WOOLLENWEBER, W. E. | SAE Technical Papers | 1956