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" Engineers have been throwing a lot of energy recently at eliminating turbo lag and making turbocharging more efficient and flexible overall. Volvo&amp;#039;s Drive-E concept engine takes several converging technologies and brings them together in a single, extremely power-dense, and allegedly lag-free package.  RELATED: Meet the 2016 Volvo XC90 ... and then watch it roll over Volvo they started with their standard 320-hp Drive-E engine, which is already dual-charged (that is, a supercharger operates at lower RPM and a turbocharger takes over to provide boost at higher RPM\u2014fairly exotic for a mainstream engine), and they tweaked the forced induction setup. Gone is the mechanical supercharger, and an electric supercharger instead compresses air and uses it to pre-spool twin parallel turbochargers, providing good low-speed response and a robust output figure.  The electric supercharger has gone from being the stuff of snake-oil salesmen and forum inside jokes to a real technology. And it opens the door to unusual configurations like this\u2014which isn&amp;#039;t to say it doesn&amp;#039;t have a downside. As we know, energy storage technologies are still problematic, with low storage densities and high weight\u2014I&amp;#039;m referring to conventional batteries. Perhaps Volvo will couple this technology with lighter capacitors. Either way, the other tradeoff will be cost. It will be interesting to see, if the engine goes into production, what products it will debut in and what sort of premium it will command. RELATED: Jaguar goes all in on a new engine family called Ingenium Until then, it&amp;#039;s a fascinating idea from a company trying mightily to stay relevant in a tough marketplace. "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.roadandtrack.com/new-cars/videos/a8812/volvo-drive-e-2-liter-triple-charged-engine-concept/>