BorgWarner is providing its regulated two-stage (R2S) turbocharging technology for Volkswagen’s new high-performance Euro 6 diesel engine.
The R2S turbocharging system consists of two series-connected turbochargers and features a variable turbine geometry (VTG) turbocharger for the high-pressure stage combined with a larger B03 water-cooled turbocharger optimised for low-pressure exhaust gas recirculation (LP EGR).
By combining two series-connected turbochargers of different sizes, the company says its R2S technology provides high boost pressures over the entire engine speed range.