BorgWarner’s optimized turbocharging technology powers all new four-cylinder gasoline engines from Volvo. The backbone of Volvo’s gasoline Drive-E powertrain family, the fuel-efficient engines are available for nearly all models in four different variants and achieve a power output of 152 HP (112 kW) to 320 HP (236 kW). While delivering a maximum torque of 250 to 400 Nm, BorgWarner’s turbochargers help these gasoline engines set new standards of efficiency and performance. All of BorgWarner’s optimized turbochargers feature an integrated sheet-metal turbine housing for improved thermal insulation and reduced surface temperature. The compact and lightweight turbochargers have a modular design to meet Volvo’s powertrain strategy.
To provide a high degree of commonality between engine parts in a compact design, BorgWarner engineers developed an air-gap insulated sheet metal turbine housing for the turbochargers with a virtually identical external geometry suitable for use in all engines. The innovative housing consists of several stamped sheet-metal parts that are welded together, resulting in improved thermal insulation and reduced surface temperature to withstand exhaust temperatures of up to 1,796 F (980°C).
Further benefits of the design are a wider performance range from a low-inertia turbine wheel and a better transient response due to the improved utilization of exhaust gas pulsation. As a result, the catalytic converter is activated more rapidly during cold starts for significantly reduced emissions. To prevent charge pressure at very high engine power, the turbochargers are fitted with a wastegate. Built to deliver powerful yet efficient performance, these turbocharging technologies provide excellent torque characteristics over the entire engine speed range while improving fuel economy.
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