Direct injection gasoline engines
Posted: Thu 18 Dec 2008, 22:24:30
This seems promising, though not revolutionary. GM will be producing two forms of direct injecton gasoline engines next year, and they promise substantial fuel savings, about 134 gallons per year on a small SUV used for 15,000 miles. (Well, assuming GM is producing anything, that is.)
The mystery to me is that this idea seems so basic, its just a mimic of diesel technology, so why has it not been applied to gasoline engines before? But, kudos to GM all the same, maybe the public will get some payback for the retooling bailout.
See article at Detroit Free Press
" An advanced engine technology will improve fuel consumption and power for three key vehicles General Motors will unveil at the North American international Auto Show in Detroit next month.
Direct fuel injection will push EPA fuel economy ratings for the new 2010 Chevrolet Equinox compact crossover to at least 30 m.p.g. on the highway, GM will promise today when it reveals two new engines that use the system. Direct injection saves fuel and improves power by allowing very precise control of how and when fuel is injected into the engine's cylinders.
"It's a win-win for the consumer," said Jim Hall, managing director of 2953 Analytics, a Birmingham forecasting firm.
The 2010 Equinox will come with either a 2.4-liter four-cylinder engine or a 3.0-liter V6. GM hasn't revealed fuel economy figures for the V6, but the engine will produce 255 horsepower, an impressive output for a small V6. The V6 also is to be available in the Buick Lacrosse and Cadillac SRX.
By 2010, GM says it will offer direct-injection engines in 38 vehicles around the world. The company expects to sell 500,000 direct-injection gasoline engines in 2009. GM estimates the all-new 2010 Equinox will save its owners $270 to $400 a year.
The Equinox, LaCrosse midsize sedan and SRX crossover all will feature DI engines and six-speed automatic transmissions. Combined with other technologies that GM already uses, like variable-valve timing and cylinder deactivation, GM says the net result will be that the vehicles it builds in 2009 will use 700 million gallons of gasoline less over their lifetimes than their 2008 counterparts.
The 2.4-liter four-cylinder engine is part of GM's Ecotec global family of four-cylinder engines.
It will come from GM's Spring Hill, Tenn., plant. The 3.0-liter V6, which comes from the same family as the 3.6-liter V6 used in the Cadillac CTS, Chevrolet Traverse and other models, is to be produced in Ramos Arizpe, Mexico, and St. Catharines, Ontario."
The mystery to me is that this idea seems so basic, its just a mimic of diesel technology, so why has it not been applied to gasoline engines before? But, kudos to GM all the same, maybe the public will get some payback for the retooling bailout.
See article at Detroit Free Press
" An advanced engine technology will improve fuel consumption and power for three key vehicles General Motors will unveil at the North American international Auto Show in Detroit next month.
Direct fuel injection will push EPA fuel economy ratings for the new 2010 Chevrolet Equinox compact crossover to at least 30 m.p.g. on the highway, GM will promise today when it reveals two new engines that use the system. Direct injection saves fuel and improves power by allowing very precise control of how and when fuel is injected into the engine's cylinders.
"It's a win-win for the consumer," said Jim Hall, managing director of 2953 Analytics, a Birmingham forecasting firm.
The 2010 Equinox will come with either a 2.4-liter four-cylinder engine or a 3.0-liter V6. GM hasn't revealed fuel economy figures for the V6, but the engine will produce 255 horsepower, an impressive output for a small V6. The V6 also is to be available in the Buick Lacrosse and Cadillac SRX.
By 2010, GM says it will offer direct-injection engines in 38 vehicles around the world. The company expects to sell 500,000 direct-injection gasoline engines in 2009. GM estimates the all-new 2010 Equinox will save its owners $270 to $400 a year.
The Equinox, LaCrosse midsize sedan and SRX crossover all will feature DI engines and six-speed automatic transmissions. Combined with other technologies that GM already uses, like variable-valve timing and cylinder deactivation, GM says the net result will be that the vehicles it builds in 2009 will use 700 million gallons of gasoline less over their lifetimes than their 2008 counterparts.
The 2.4-liter four-cylinder engine is part of GM's Ecotec global family of four-cylinder engines.
It will come from GM's Spring Hill, Tenn., plant. The 3.0-liter V6, which comes from the same family as the 3.6-liter V6 used in the Cadillac CTS, Chevrolet Traverse and other models, is to be produced in Ramos Arizpe, Mexico, and St. Catharines, Ontario."