Volkswagen Might Develop a Cylinder Deactivation System for 1.4-liter Engines
However, it seems that the Germans are considering taking the concept even further. You, see, until now, it has been announced for vehicles with V8 engines, but VW engineers want to use it for a future 1.4-liter TSI four-pot unit that will debut on the seventh generation of the Golf, allowing the compact to offer impressive efficiency figures.
When power isn't needed, the engine will only use two cylinders, thus offering increased efficiency, with the cycle due to be used 1,400 and 4,000 rpm.
Neither the deactivation itself nor the fuel efficiency increase are the problem, However, the process has to be almost imperceptible to the driver, and this is where the most engineering efforts are needed.
The systems monitors parameters such as the throttle pedal's position, engine load, accessories usage level and others in order to switch between the two- and four-cylinder modes.
However, all this is still only a rumor, so we can't go too far yet. Should the development make it into production, we expect to see it on multiple VW Group models that use this engine, such as the VW Polo and the Audi A1.