Mitsubishi Heavy Industries Technical Review
    Vol. 52 No. 1 (2015)   New Products & Technologies
    Technical Papers

    Development of Two-stage Electric Turbocharging system for Automobiles

    BYEONGIL AN
    NAOMICHI SHIBATA
    HIROSHI SUZUKI
    MOTOKI EBISU

    Engine downsizing using supercharging is progressing to cope with tightening global environmental regulations. In addition, further improvement in fuel consumption is expected with such applications as ultra-high EGR, Miller cycle, and lean combustion. Mitsubishi Heavy Industries, Ltd. (MHI) has developed a two-stage electric turbocharging system to balance better drivability and improved fuel consumption by increasing the turbocharging pressure and improving the transient response.