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Diesel-powered Cruze can drive for 10 hours on a single tank of fuel

The EPA has handed down its fuel economy estimates for Chevrolet's new 2014 Cruze Clean Turbo Diesel. The EPA is estimating the vehicle will get 46 mpg on the highway, making it the most fuel-efficient non-hybrid vehicle in America. General Motors says that the car will be available in certain cities this spring and around the country and Canada early this fall.

The turbodiesel version of the Cruze is equipped with a six-speed automatic transmission and has an estimated range of 700 highway miles on a single tank of diesel fuel.
The 2.0-liter turbodiesel engine is rated for 148 hp and 258 pound-feet of torque (the engine features a special over boost function that can increase torque to 280 pound-foot for short bursts as needed). The vehicle is capable of accelerating from a stop to 60 mph in 8.6 seconds.

“We harnessed generations of diesel expertise to adapt our world-class global engine for the North American market,” said Gary Altman, chief engineer, Chevrolet Cruze Diesel. “The Cruze Diesel is the best diesel passenger car out there. Chevrolet is redefining the meaning of great fuel economy with this car.”

The starting price for the car is $25,695 including the $810 destination charge. The Cruze Clean Turbo Diesel also features the Chevrolet MyLink infotainment system, 17-inch wheels, leather seating, a five-year 100,000-mile powertrain warranty, and a two-year maintenance plan as standard equipment.

Source: GM

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RE: Nice but...
By Solandri on 4/18/2013 2:48:01 PM , Rating: 2
It affects handling a bit (IIRC better for racing worse for passenger comfort)

Yeah, more rim, less tire means a stiffer tire (relatively) and less dampening of bumps on the road. Very analogous to stiffer shocks.

Italian tire maker Pirelli is predicting that over the next decade or two standard tires will change to really tall (>20" rims) narrow tires that look similar to the wagon wheel inspired ones used on early cars. Doing this will let them make the tires significantly narrower (for reduced drag/rolling resistance leading to better fuel economy) while maintaining a similar size contact patch so that traction remains similar to current tires.

I have a hard time seeing that coming about. To maintain the contact patch size while moving to a narrower tire, the tire has to deform more when it hits the road. Tire deformation is the primary source of rolling resistance. So it would defeat the purpose of moving to narrower tires.

I'm curious if something analogous to an interferometer would work here. If two narrow tires placed side-by-side (so your car would have 8 tires in total) can provide similar performance to one fat tire of equal width, while giving most of the fuel economy savings of a narrow tire.

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