“When we launched the Drive-E powertrain family, our aim was to deliver the most advanced four-cylinder engines in the industry based on emissions and fuel consumption relative to performance and drivability. We knew that 235kW in our petrol configuration was just a starting point. The 331kW high performance Drive-E powertrain concept demonstrates this ambition and the versatility,” said Dr Peter Mertens, senior vice president for research and development at Volvo Car Group.
The vehicle’s engine makes use of two parallel turbochargers, which are fed by an electrically powered turbo-compressor. The compressed air from this unit, rather than being fed to the cylinders, is instead used to spool up the two parallel turbochargers. Fuel is fed by a dual fuel pump working at 250-bar pressure. With this kind of power density, this triple boost installation and unique fuel system enables driveability without any turbo lag when compared to a mono-turbo.
“There are several high power small size applications where one large turbo is used to create a high level of power available from other manufacturers, but the driving experience suffers due to slow engine response. We felt that with our heritage of being among the first car companies to embrace and offer a broad range of turbo technology since 1981, that we could improve this,” said Michael Fleiss, vice president of powertrain engineering at Volvo Car Group.