The details have been released for Chevrolet’s upgraded version of the Ecotech engine, that will first debut on the 2013 Chevrolet Malibu sedan next summer.
Ecotech’s latest version is a 2.5L four-cylinder motor that puts out 190 hp and 180 lb-ft of torque, compared to the previous version it has a larger displacement and 12 percent more horsepower and 16 percent more torque. Chevy is also estimating improved fuel economy at over 30 mpg on the highway.
Chevy used lower engine friction, an actively controlled thermostat, and a variable-displacement oil pump as some of the ways it enhanced the engine’s efficiency. A new combustion system which provides a higher compression ratio was also used.
Further refinement comes from elements such as relocated balance shafts, a stronger forged steel crankshaft, inverted-tooth chains for the camshaft, a two-piece oil pan, and cast aluminum bed plate. Most of these changes work to cut down noise.
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Some elements remained consistent between the generations, such as the high-pressure, direct-injection fuel system, electronic throttle control, jet-spray oil cooled pistons, and dual overhead camshafts with continuously variable valve timing.
Global Chief Engineer Mike Anderson, adds other highlights of the new motor, saying “The noise intensity is 40 percent less than our 2.4L direct-injected engine, which was named one Ward’s 10 Best Engines.
Engineers also tuned the 2.5L to deliver more of its torque at lower rpm, giving the Malibu a stronger feel at launch and during on-demand maneuvers, such as passing or accelerating on a freeway entrance ramp.”
Scheduled for release next summer, the new motor will be featured the in 2013 Malibu.
By: Alexandra Koken