Flexibility in Charge Composition
Just as the SuperTurbo’s™ ability to control air flow to the engine allows for greater engine efficiency, this same feature allows for more flexibility for engine tuning to improve emissions. For diesel engines with high pressure EGR, air flow and EGR flow can be varied largely independently. This more precise control over the charge flow composition can help engine manufacturers tune engines for lower emissions.
Lower emissions are also possible during transient engine operation. The quick rise in boost pressure provided by the SuperTurbo reduces over-fueling during transients, improving particulate and smoke emissions. The improvement in air flow during the transient also allows for more EGR flow that would cause excessive amounts of turbo lag in a standard turbocharger, which in turn reduces NOx emissions during transient engine operation.