Two-stage turbocharger system

  • 03-Mar-2010 05:27 EST

Improved gasoline-engine fuel efficiency and reduced CO2 emissions without sacrificing power are claimed to be enabled by FEV’s two-stage turbocharging system. In addition to a emissions reduction of approximately 17%, the GT2 unit offers a considerable increase in torque compared to single-stage units, according to the company. The two-stage turbo is designed for use with smaller-displacement engines, giving them the power of a much higher displacement unit. By providing high torque at low engine speeds, fuel consumption is also reduced under real driving conditions, the company claims. For its 1.8-L SI test engine, FEV handled exhaust manifold design; BorgWarner contributed some of the system hardware. The system is currently installed in a demonstrator vehicle.

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