|Scania’s third-generation CI ethanol engine.|
Scania is now extending the application of its third-generation heavy-duty, ethanol-fueled engines to a range of trucks.
Scania’s ethanol engines work according to the diesel principle (compression-ignition, CI). At 43%, the thermal efficiency of Scania’s new ethanol engine is on a par with its diesel engines (44% thermal efficiency). The ethanol used for diesel combustion contains 5-7% additives that improve ignition and lubrication.
The new ethanol engine is an adaptation of Scania’s 9-liter diesel engine with charge-cooling and exhaust gas recirculation (EGR). The engine meets the enhanced environmentally friendly vehicle (EEV) standard, which is slightly stricter than Euro 5, the exhaust standard being introduced in the European Union in October 2009.
The engine delivers 270 hp (201 kW) of power and torque of 1,200 Nm (885 lb-ft).
Scania regards ethanol as the most cost-efficient renewable fuel currently available for urban operation. (Earlier post.)
Scania has built 600 ethanol-powered city buses since 1989, supplying most of them to Swedish cities. According to Stockholm Public Transport (SL), there are no operational drawbacks as long as scheduled maintenance requirements are followed. The buses are completely standard, using regular Scania components.
Scania is working together with other interested parties in establishing an infrastructure for ethanol fuel distribution. Once the fuel infrastructure is in place, the company says, it will also be possible for smaller transport companies to invest in ethanol-powered vehicles.