Dualjet – Suzuki injection system

Good evening, only by chance I stumbled over the fact that at Suzuki, at least for some models, one works with two injection nozzles per cylinder. Thus the engine reaches very favorable EU consumption values (1.2 – liter with 90 hp has 4.3 l / 100 km, for comparison, VW Polo 1.2 TSI Blue Motion Technology with 90 hp has 4.7 l / 100 km and a Ford Fiesta 1.0 Eco Boost with 100 hp reaches 4.5 l / 100 km). So Suzuki achieves better EU consumption without direct injection and without turbocharger. I am now thinking about where the savings potential is supposed to slumber. I know that Opel once had a similar system some time ago, the “Twinport” – engines with two-part inlet curvatures and very high AGR – rate used a filling, – and a drift channel, which is why the high proportion of exhaust gas in the fresh gas could be equalized (and thus a high degree of dethrottle was achieved), but there was only one injection nozzle per cylinder installed. White jema and details about Suzuki ́s technique and the background? Here definitely the driving report.