Clever. The air hybrid powertrain that Citroen will be bringing to the Geneva Motor Show next month is nicknamed N-Air-Gy. Or, at least, that's what it says in the rendering that Citroen released today in preparation for the Swiss event. We've heard about this technology before, with the hint that it might some day go into one of PSA Citroen's B-segment compact hatchbacks. In Geneva, the powertrain will be displayed in a C3 VTi 82 hatchback.