Just the Facts: Despite promises that the Chevy Volt will operate as an electric car at all times, it will in fact at times be directly driven in part by its internal combustion engine. The mechanical link between Ecotec internal combustion engine and drive wheels will be at high speed. DETROIT — It's the big headline currently on GM's media news site: "2011 Chevrolet Volt Reinvents Automotive Transportation IN A Complete No Compromises Electric Package" Um, well, no. Even conceding that all engineering projects involve compromise and chalking that phrase up to marketing hyperbole, the Chevy Volt isn't as electric...