Like its mechanical twin, the 2010 Chevrolet Equinox, the new GMC Terrain is getting an engine lineup that consists entirely of direct injected engines. The base 2.4-liter EcoTec four cylinder is expected to give the Terrain an EPA highway fuel economy of 30 mpg and get cleaner cold-start emissions. Cold starts are when engines produce the vast majority of emissions and GM is using a two pulse strategy with it’s direct injection system to help warm up the cylinder walls and catalytic converter faster. A richer primary pulse is injected allowing the spark plug to light it off faster. This is followed by a leaner secondary pulse. Once the engine warms up, only the second pulse is used. The optional engine in the Terrain will be the new 3.0-liter direct injected V6 that’s also going into the new Buick LaCrosse and Cadillac SRX. There are two videos and a press release after the jump.
[Source: General Motors]
New York 2009: GMC Terrain gets all-DI engine lineup originally appeared on AutoblogGreen on Wed, 08 Apr 2009 10:17:00 EST. Please see our terms for use of feeds.