|The 3-cylinder, 1.2L diesel in the Polo BlueMotion. Click to enlarge.|
The Polo’s 1.2-liter three-cylinder TDI is derived from the 1.6-liter four-cylinder TDI of the new Golf and Passat BlueMotion. This smaller TDI is also remarkably quiet thanks to the latest generation of common rail injection. Despite its relatively small displacement, the 1.2L 55kW (74 hp) TDI engine can deliver a torque of 180 N·m (133 lb-ft) at 2,000 rpm.
The new engine and other specific modifications have delivered fuel savings of 0.9 liters per 100 kilometers in the Polo BlueMotion. This represents a 22% reduction in fuel consumption, from 4.2 to 3.3 liters per 100 km (56 mpg US to 71 mpg US), compared to a conventional Polo TDI with 75 PS. CO2 emissions are similarly reduced from 109 to 87 g/km.
The specification for the new 3-cylinder TDI called for the greatest possible dynamic engine performance with reduced displacement, maximum acoustic comfort and systematic weight reduction, without compromising the engine’s thermodynamic efficiency.
In addition to its reduced weight, the three-cylinder engine also offers reduced friction power loss.
In his lecture at the Vienna symposium, Professor Dr. Wolfgang Steiger, Head of Future Technologies in Group Communications, said that:
Attitudes toward mobility are changing—not least of all due to the effects of the economic crisis and climate change—and are moving toward a sustainability perspective. Political entities around the globe react very differently to these issues, but they nearly always end up focusing on the promotion of electric mobility.
However, Steiger added, long distance and freight transportation will continue to rely on internal combustion engines with highly efficient drive systems in the foreseeable future, so a long period of coexistence can be expected between E-technology and classic internal combustion engines.
The new 1.2 TDI engine is a proof point, Volkswagen said, that such internal combustion engines can meet current and future demands.