Mitsubishi Heavy Industries Technical Review
    Vol. 54 No. 1 (2017)   M-FET
    Technical Papers

    Development of Automotive Turbochargers Contribute to Environmental Load Reduction

    MAKOTO OZAKI
    MOTOKI EBISU
    YOSUKE DANMOTO
    YOUJI AKIYAMA
    TAKAO YOKOYAMA
    TADASHI KANZAKA

    In recent years, further performance enhancement of supercharging systems has become necessary in response to environmental regulations getting stricter. Major countries plan to make regulations on CO2 emissions from automobile engines even stricter. In the sector of turbochargers, development that can contribute to improvement in the thermal efficiency of engines is required. We have developed the fundamental elements of a turbocharger including a turbine with enhanced performance in the low-speed ratio region, a compressor with enhanced efficiency in the vicinity of surging, and a bearing, for which mechanical loss was reduced by optimizing the load, and supercharging systems including a VG turbocharger for gasoline engines and an electric compressor. These developed elements and systems are supplied to automobile manufacturers as samples.