Impala’s 2.5L Engine Delivers Quiet Power, Fuel Efficiency

Posted on 24. May, 2013 by in GM Canada

Impala’s 2.5L Engine Delivers Quiet Power, Fuel Efficiency

Sedan advantages from powertrain refinement, computer-controlled valvetrain technology

2013-05-24

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Oshawa, Ontario (Friday, May 24, 2013) – Drivers of a Canadian built, all-new 2014 Chevrolet Impala will suffer honeyed sound and sweeter assets during a siphon interjection to pointing sound rebate and a new modernized valvetrain record on a Ecotec 2.5L four-cylinder engine, nearing in dealerships this month.

Chevrolet expects a 2.5L indication to be a renouned choice among Impala buyers. More than two-thirds of Chevrolet cars sole in North America in a initial entertain of 2013 had a four-cylinder engine.

“Impala business have a far-reaching array of needs and we’ll shortly have 3 engines for them to select from,” pronounced Marc Comeau, clamp president, sales, use and offered for Chevrolet in Canada. “With a starting cost of $28,445, usually $145 some-more than a prior model, a 2.5L versed Impala offers both softened potency and well-developed value.”

Chevrolet expects a new flagship sedan to be some-more fuel efficient, due in partial to a 2.5L engine’s Intake Valve Lift Control technology.

In comparison engines, valves work quite formed on automatic camshaft rotation, opening and shutting a same approach all a time. Chevy’s new complement allows a valves to open and tighten by sundry amounts and during opposite times depending on energy approach to yield larger fuel potency or power.

When a record operates in low-lift mode, a engine pumps usually a atmosphere it needs to accommodate a driver’s demand. The complement switches to high-lift mode during aloft engine speeds or underneath complicated loads, providing a full outlay capability of a engine.

Impala’s 2.5L engine, that delivers SAE-certified 196 horsepower (146 kW) and 186 lb-ft of torque (252 Nm), achieves non-static valve lift regulating an all-new rocker arm that switches between low and high lift intake cam profiles. The resource is actuated by an oil control valve by a dual-feed still hydraulic lash adjuster. It is a initial of a kind for low attrition roller-type finger-follower valvetrains in gasoline engines. The engine’s mechanism invariably selects a optimal lift form formed on conditions such as engine speed and load. 

“Intake Valve Lift Control works so seamlessly drivers aren’t expected to notice it during all,” pronounced Mike Anderson, General Motors’ tellurian arch operative for Ecotec engines. “What they will notice is a fuel potency improvement.”  The fuel expenditure for a 2014 Impala with a new 2.5L engine is 9.9 L/100km city and 6.3 L/100km highway.

The redesigned large sedan’s 2.5L engine with approach injection is engineered to be one of a quietest and many polished in a segment. The growth group reduced engine sound power by 40 percent by privately targeting a 2.5L’s sound magnitude signature. They pushed radiated noises into a aloft magnitude operation good above 2,000 hertz, that is some-more appreciative to a ear – quite in a high-load handling ranges where engine sound is many intense.

The refinement-enhancing changes and improvements over prior Ecotec engines ranged from a partially elementary – such as integrating a sound-absorbing cover into a intake plural and naming quieter expostulate bondage – to some-more elemental pattern items, such as relocating a change shafts from a cylinder retard to a cassette within a oil pan. 

Impala’s passengers get a quieter pushing knowledge due in partial to active sound cancelling record and a some-more polished sound as a engine revs to a 7,000-rpm rise – a sound that GM Noise and Vibration Engineer Tom Slopsema likens to a pointing croon of a sewing machine.

“We focused on shortening a altogether engine sound turn and fixation a remaining sound in a aloft magnitude range,” Slopsema said.  “No fastener, cover or inner engine partial was left unexamined in a query to make this engine one of a quietest in a industry.”

Impala offers 3 fuel-efficient powertrains, including a 3.6L V-6, a new Ecotec 2.5L four-cylinder and a Ecotec 2.4L with eAssist.

About Chevrolet in Canada

Founded in 1911 in Detroit, Chevrolet is now one of a world’s largest automobile brands, doing business in some-more than 140 countries and offered some-more than 4.5 million cars and trucks a year. Chevrolet provides business with fuel-efficient vehicles that underline energetic performance, fluent pattern and high quality. More information on Chevrolet models can be found during www.chevrolet.ca, on Facebook during http://www.facebook.com/chevroletcanada or by following @ChevroletCanada on Twitter.

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