Vta Technology Shows Fuel Sayings

摘要

The term VTA denotes a system of adjustable nozzle ring vanes which replace the fixed vane nozzle rings fitted in MAN Diesel's standard axial TCA and radial TCR turbochargers. Adjusting vane pitch regulates the pressure of the exhaust gases on the turbocharger turbine to vary the output of the compressor. With VTA the quantity of charge air entering the cylinder can thus be more precisely matched to the quantity of fuel injected, so that combustion can be optimised at all points on the engine's operating profile. In this way specific fuel consumption and related emissions can be minimised at all engine speeds and loads, combined with improved dynamic behaviour of the engine-turbocharger system ie better engine response.