Buick unveils the 2012 LaCrosse with eAssist,™ a new fuel-saving technology that increases fuel economy by 25 percent compared to the four-cylinder/six-speed powertrain in the 2011 LaCrosse.
Photo: 2012 Buick LaCrosse eAssist -
The eAssist technology provides class-leading highway fuel economy of 37 mpg, while maintaining the luxury, performance and value expected from Buick’s flagship sedan.
Photo: 2012 Buick LaCrosse eAssist
The eAssist system becomes the standard powertrain on LaCrosse starting next summer. The system uses a state-of-the-art lithium-ion battery system and electric motor-generator to enable regenerative braking capability to improve LaCrosse fuel economy by an estimated 25 percent.
Photo: 2012 Buick LaCrosse eAssist
“The LaCrosse with eAssist technology is the latest example of how this successful car – with sales up more than 200 percent for the year – is shaking up the segment and helping to reinvent Buick,” said John Schwegman, vice president of Buick marketing. “It is the smart choice for those who want great fuel economy and performance in a luxury vehicle, with excellent value – the LaCrosse with eAssist will cost thousands less than competitors with similar technologies.”
Photo: 2012 Buick LaCrosse eAssist
Mated to a 2.4L Ecotec direct injection four-cylinder engine and next-generation six-speed automatic transmission, the eAssist system uses power stored in the battery to provide needed electrical boost in various driving scenarios, optimizing engine and transmission operation. An advanced 115V lithium-ion battery and latest-generation 15-kW motor-generator unit help increase fuel economy through:
Regenerative braking, which provides up to 15 kW of electricity to charge the battery
Providing up to 11 kW (15 hp) of electric power assistance during acceleration
Automatic engine shut-off when the vehicle is stopped
Aggressive fuel cut-off during deceleration down to zero vehicle speed, enabled by the torque smoothing provided by the motor-generator unit
Intelligent charge/discharge of the high-voltage battery.
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