Wolfsburg, Germany – Volkswagen has become the world’s first manufacturer to implement cylinder shut-off on a four-cylinder TSI engine in high-volume production. Under the right conditions, the company’s 1.4-litre TSI will deactivate two of its cylinders for improved fuel economy.
The 1.4-litre TSI (Twincharger) is used in several of Volkswagen’s models globally, including the Golf, Scirocco and Eos. The company said that the shut-off system reduces fuel consumption overall by 0.4 L/100 km, and up to about 0.6 L/100 km when the start/stop functionality is included. At 50 km/h in third or fourth gear, fuel savings amount to nearly 1.0 L/100 km.
Cylinder shut-off is active whenever the engine speed is between 1,400 and 4,000, which Volkswagen said applies to nearly 70 per cent of the driving distance in the European Union fuel economy driving cycle. The system takes its information from the accelerator pedal sensor and reactivates cylinders 2 and 3 when the throttle pedal is pressed sufficiently hard. If the driver exhibits a non-uniform pattern, such as driving in a roundabout or in sporty style on a country road, the shut-off functionality is automatically suppressed.