While any self-respecting futurist foretells a world of electric driving, the engineers dedicated to making the internal combustion engine ever more efficient aren’t throwing in the oily towel. Good thing, because electric cars remain years away from offering the affordability, performance, and practicality needed to truly displace conventional automobiles. Until that combination arrives, automakers will continue relying on the internal combustion engine. The challenge lies in keeping up with ever stricter emissions and fuel economy regulations in the US and Europe, while delivering the power and performance consumers demand. Automakers have several ways of doing that, and industry supplier BorgWarner just developed another. It’s called the e-booster, and the company claims it could improve fuel efficiency by up to 10 percent without a corresponding drop in performance, by making turbochargers even more effective. First, a word about turbochargers. They’re essentially a small turbine, driven by exhaust gasses, that forces more air into the combustion chamber. More oxygen means more power from the same amount of fuel. Voila, greater power without a decrease in f...