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2011 Chevrolet Cruze Eco Literally Morphs Into 40MPG Leader

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The new 2011 Chevrolet Cruze ‘Eco’ model has been touted as one of the most fuel-efficient small cars on the market. To accomplish this, the new Cruze Eco has a new innovative feature that can automatically shutter air literally changing the vehicles shape based on wind and temperature conditions. The new shutter system uses an electric motor to open and close the shutters redirecting air thus allowing for better fuel efficiency up to an estimated 40mpg on the highway. That means the Cruze Eco gets hybrid-like efficiency without the hybrid cost.

2011 Chevrolet Cruze Eco Press Release

DETROIT – Squeezing out every last drop of fuel efficiency is one of the key tasks for Greg Fadler, aerodynamics engineering group manager at Chevrolet.

Fadler and his team worked on making the 2011 Chevrolet Cruze Eco one of the most fuel-efficient small cars on the market, achieving up to an estimated 40 MPG on the highway – hybrid-like efficiency without the hybrid cost.

Engineers used some of the proven approaches to making the Cruze Eco a gas sipper, trimming its overall weight and lowering the ride height. But the real innovation is behind the front grill where an automatic air shutter system allows the car to change shape and cut through the air more smoothly.

The air shutter system uses sensors to feel and sense wind and temperature conditions. The sensors are married to electric motors that open and close the shutters automatically.  With the shutters closed at high speeds, wind drag is reduced. At lower speeds, the shutters open to maximize engine-cooling air flow, contributing nearly half a mile per gallon in combined city and highway driving.

The cooling systems for all GM vehicles are designed for the worst-case scenario, which is Death Valley, Calif., at 110 F, pulling a trailer up a 7 percent grade. The shutter allows them to significantly improve fuel economy, while still providing the cooling needed in that extreme case.

“The real fun of the job is when we discover something new or innovative that allows us to do something better than we or our competition has done before,” Fadler said.

[source: General Motors]

2011 Chevrolet Cruze Eco Specifications

VEHICLE TYPE: front-engine, front-wheel-drive, 5-passenger, 4-door sedan


ENGINE TYPES: DOHC 16-valve inline-4, aluminum block and head, port fuel injection; turbocharged and intercooled DOHC 16-valve inline-4, aluminum block and head, port fuel injection

Displacement: 110 cu in, 1796 cc/83 cu in, 1364 cc
Power (SAE net): 138 bhp @ 6300 rpm (1.8)/138 bhp @ 4900 rpm (turbo 1.4)
Torque (SAE net): 125 lb-ft @ 3800 rpm (1.8)/148 lb-ft @ 1850 rpm (turbo 1.4)

EPA city/highway driving: 26–28/40 mpg

Wheelbase: 105.7 in Length: 181.0 in
Width: 70.7 in Height: 58.1 in
Curb weight (C/D est): 2850–3000 lb

TRANSMISSIONS: 6-speed automatic with manumatic shifting, 6-speed manual


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