Multistage Supercharging for Downsizing with Reduced Compression Ratio

Abstract

Downsizing remains one of the key technologies for reducing CO 2 emissions in diesel engines. A variable compression ratio makes it possible to achieve a further increase in specific power output while staying within the thermo-mechanical stress limits, although this is necessarily linked with a further rise in boost pressures. Against this background, IAV has examined the potential of multi-stage supercharging for achieving a specific power output of 110 kW/l on the basis of steady-state and transient simulations.COVER STORY SUPERCHARGING COVER STORY SUPERCHARGING