A sedan version of its earlier Passat TSI EcoFuel wagon concept was recently introduced by Volkswagen, featuring the vehicle at the Bologna Motor Show this week. The vehicle can utilize either gasoline or natural gas for fuel, the EcoFuel vehicles are propelled by a 1.4 liter TSI engine that generates about 150 hp (112 kW).
The engine comes with both a supercharger and a turbocharger operating in sequence to offer relatively high energy yields from its small facility. To permit the engine to manage the extra loading encountered due to the burning of natural gas instead of gasoline, considerable alterations have been done.
The valves, piston rings and the pistons themselves are all upgraded to cope, at the same time the turbocharger has also been substituted with a smaller unit.
A new management computer controls the switch between typical fuel and natural gas. A trio of tanks with a total capacity of 22 kilograms located under the trunk stores the natural gas. This is supported by a 31 liter tank of gasoline. The Passat TSI EcoFuel is given a theoretical range of around 500 miles (800km) between these two fuel tanks.
It has a ceiling speed of 130mph and an accelaration rate of 0 to 62mph in 9.8 seconds, making it practical for daily use. In typical situations the car utilizes 4.5kg of natural gas per 100km.
Outfitted with a DSG dual-clutch gearbox, the Passat EcoFuel will discharge lower than 120g of CO2/km, roughly equivalent to a much smaller compact hatchback. Although VW has yet to announce its plans for producing its EcoFuel technology, considering its remarkable fuel efficiency it will come soon enough.