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Chrysler Introduces All-New Pentastar V-6 Engine

April 09, 2009

On April 8, Chrysler LLC introduced an all-new line of V-6 engines that will improve fuel efficiency across the Chrysler, Jeep and Dodge lineup by 8 percent on average compared with previous Chrysler V-6 engines. This more refined and fuel-efficient V-6 engine will ultimately replace seven current Chrysler V-6 engines.

The new 3.6-liter V-6 engine--named Pentastar--is part of the company's overall $3 billion powertrain offensive. It will first be offered in the all-new 2011 Jeep Grand Cherokee.

The Pentastar is an all-new design, featuring double-overhead camshafts (DOHC) and a high-pressure die-cast aluminum cylinder block in a 60-degree configuration.

In the all-new 2011 Jeep Grand Cherokee, the all-new 3.6-liter Pentastar V-6 engine will deliver 280 horsepower (209 kW) at 6,400 rpm and 260 pounds.-feet. (353 Nm) of torque at 4,800 rpm-an increase of 33 percent in horsepower and 11 percent in torque over its predecessor-while providing an 11 percent fuel economy improvement.

The new Pentastar V-6 also will contribute a 2 mpg increase to Chrysler's CAFE by 2015, resulting in fewer greenhouse gas emissions and a reduction in oil dependence.

During the initial goal setting for the Pentastar program, Chrysler engineers benchmarked the industry's leading engines to set functional targets. The result is an all-new engine that delivers truly world-class customer attributes.

Chrysler's all-new 3.6-liter Pentastar V-6 engine design features a double-overhead cam (DOHC), narrow included valve angle, cylinder head and high-flow intake and exhaust ports. This design, combined with dual independent cam phasing, allows optimum volumetric and combustion efficiency over the full speed and load range, resulting in an exceptional, flat torque curve along with high specific power-the engine's torque exceeds 90 percent of its peak value from 1,600 to 6,400 rpm-which will provide customers with outstanding drivability and responsiveness, without the need for premium fuel.

The advanced oil filter system eliminates oil spills and contains an incinerable filter element-more efficient disposal than the typical spin-on filters, which are disposed of in landfill sites. The use of long-life spark plugs and a high-energy coil-on-plug ignition system also helps to reduce cost of ownership.

The Pentastar V-6 is designed to run on regular gasoline, offering a 10 percent reduction in fuel cost compared with premium fueled engines. The engine also is fully flex fuel capable, offering consumers the choice of gasoline or E85 fuel without any degradation in performance or emissions.

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