2011 Buick Regal Turbo gets flex fuel capability
Compared to earlier versions of the 2.0-liter Ecotec turbo, GM powertrain engineers have significantly upgraded the new engine with turbo power and direct fuel injection to accommodate E85 fuel and to incorporate refinements.
Aside from the direct injection, which most other companies have, the basic component set that makes up the Buick Regal's 2.0L success with variable fuel mixes includes a fuel rail and injectors, a high pressure cam-driven fuel pump and the important E39 engine control module containing the “Viper” 32 bit microprocessor.
That level of sensing and metering now allows the 2011 Buick Regal Turbo to join more than 5 million flex-fuel models General Motors which has produced over the last 15 years.
According to the GM news release out of Pontiac, Michigan, the turbocharged Ecotec 2.0-liter inline four-cylinder engine that powers the Regal will help GM reach its goal of offering more than 50 percent of its production in flex-fuel models by the end of 2012.
For the record, ethanol requires a richer air-fuel mixture than gasoline; meaning flex-fuel engines need higher flow-rate injectors. Problem is, a flex-fuel engine can potentially have any combination of gasoline or up to 85 percent ethanol in the tank at a given time, so a sensor in the fuel system is required to measures the blend in real-time.