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Fracking to thank for lower emissions, API says

Fracking to thank for lower emissions, API says

WASHINGTON, April 16 (UPI) -- The American Petroleum Institute said hydraulic fracturing of shale reserves helped lead to the gas production increase credited with lowering U.S. emissions.
Daniel J. Graeber
Tesla wants to replace side-view mirrors with cameras

Tesla wants to replace side-view mirrors with cameras

PALO ALTO, Calif., April 3 (UPI) -- Tesla Motors is known to be ahead of the technology curve and now wants to replace side-view mirrors with cameras on its cars.
Ananth Baliga
Ford adding 300 new jobs at upgraded engine facility

Ford adding 300 new jobs at upgraded engine facility

March 28 (UPI) -- Ford's Americas president Joe Hinrichs says as March sales improve, they will be adding 300 jobs and upgrading Ohio facility to produce new V6 engine.
Aileen Graef
Consumer Reports 2014 Top Picks, elderly drivers safer

Consumer Reports 2014 Top Picks, elderly drivers safer

It's nearly April -- time for Consumer Reports best cars picks.
AL SWANSON, UPI Auto Writer
UAW organizing loss in Tennessee not final word

UAW organizing loss in Tennessee not final word

The UAW's failed bid to organize hourly workers at the sprawling Volkswagen plant near Chattanooga, Tenn., is having repercussions in Germany.
AL SWANSON, UPI Auto Writer
Obama announces new fuel standards for medium, heavy trucks

Obama announces new fuel standards for medium, heavy trucks

UPPER MARLBORO, Md., Feb. 18 (UPI) -- The next phase of tighter fuel standards for medium- and heavy-duty vehicles is in the works, U.S. President Barack Obama said Tuesday.
Better fuel economy a 'win-win-win,' Obama says

Better fuel economy a 'win-win-win,' Obama says

UPPER MARLBORO, Md., Feb. 18 (UPI) -- A tighter fuel efficiency standard for medium- and heavy-duty vehicles is a "win-win-win" situation for the U.S. economy, President Barack Obama said Tuesday.
Lexus most dependable for 3rd year, new GM chief royalty

Lexus most dependable for 3rd year, new GM chief royalty

Complaints about vehicles with 4-cylinder engines and transmissions led to the first decline in the J.D. Power & Associates yearly dependability study in 15 years.
AL SWANSON, UPI Auto Writer

Ford takes a chance with 2015 F-150 pickup truck

DETROIT, Jan. 13 (UPI) -- Ford Motor Co. Chairman Bill Ford Jr. said the automaker was taking a risk with its aluminum body F-150 pickup truck, which it plans to launch this year.

USAF, Boeing transforming B-52 weapons capacity

TINKER AIR FORCE BASE, Okla., Jan. 9 (UPI) -- The "smart weapons" payload of U.S. Air Force B-52H bombers is being increased 50 percent under a USAF-Boeing program.
Ford plans 2014 as a growth year

Ford plans 2014 as a growth year

DEARBORN, Mich., Dec. 13 (UPI) -- U.S. automaker Ford Motor Co. said Friday it was preparing for a growth spurt in 2014.

Global energy demand to increase 35 percent: ExxonMobil

IRVING, Texas, Dec. 13 (UPI) -- Global energy demand is on course to be about 35 percent higher in 2040 than it was in 2010, says Exxon Mobil in its annual long-term energy forecast.

Model year 2012 vehicles set fuel efficiency record

WASHINGTON, Dec. 12 (UPI) -- Model year 2012 vehicles sold in the United States achieved a record high of 23.6 miles per gallon, the Environmental Protection Agency said Thursday.

Study of stingray swimming could improve underwater vehicles

BUFFALO, N.Y., Nov. 13 (UPI) -- Mimicking the swimming expertise of stingrays could improve the agility and fuel efficiency of unmanned underwater vehicles, U.S. engineers say.
Boeing to increase B-52 smart weapon capacity

Boeing to increase B-52 smart weapon capacity

OKLAHOMA CITY, Nov. 7 (UPI) -- The smart weapons capacity of B-52 bombers is to be expanded by 50 percent under a new $24.6 million contract to Boeing from the U.S. Air Force.
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Wiki

Fuel efficiency, is a form of thermal efficiency, meaning the efficiency of a process that converts chemical potential energy contained in a carrier fuel into kinetic energy or work. Overall fuel efficiency may vary per device, which in turn may vary per application, and this spectrum of variance is often illustrated as a continuous energy profile. Non-transportation applications, such as industry, benefit from increased fuel efficiency, especially fossil fuel power plants or industries dealing with combustion, such as ammonia production during the Haber process. The United States Department of Energy and the EPA maintain a Web site with fuel economy information, including testing results and frequently asked questions.

In the context of transportation, "fuel efficiency" more commonly refers to the energy efficiency of a particular vehicle model, where its total output (range, or "mileage" ) is given as a ratio of range units per a unit amount of input fuel (gasoline, diesel, etc.). This ratio is given in common measures such as "liters per 100 kilometers" (L/100 km) (common in Europe and Canada) or "litres per mil" (Norway/Sweden) or "miles per gallon" (mpg) (prevalent in the USA, UK, and often in Canada, using their respective gallon measurements) or "kilometres per litre"(kmpl) (prevalent in Asian countries such as India and Japan). Though the typical output measure is vehicle range, for certain applications output can also be measured in terms of weight per range units (freight) or individual passenger-range (vehicle range / passenger capacity).

This ratio is based on a car's total properties, including its engine properties, its body drag, weight, and rolling resistance, and as such may vary substantially from the profile of the engine alone. While the thermal efficiency of petroleum engines has improved in recent decades, this does not necessarily translate into fuel economy of cars, as people in developed countries tend to buy bigger and heavier cars (i.e. SUVs will get less range per unit fuel than an economy car).

This article is licensed under the GNU Free Documentation License.
It uses material from the Wikipedia article "Fuel Efficiency."
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