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Fuel efficiency (or fuel economy) is a form of thermal efficiency, meaning the ratio of effort to result 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.
In the context of transport, fuel economy is the energy efficiency of a particular vehicle, given as a ratio of distance traveled per unit of fuel consumed. It is dependent on several factors including engine efficiency, transmission design, and tire design. In most countries, using the metric system, fuel economy is stated as "fuel consumption" in liters per 100 kilometers (L/100 km) or kilometers per liter (km/L or kmpl). In a number of countries still using other systems, fuel economy is expressed in miles per gallon (mpg), for example in the US and usually also in the UK (imperial gallon); there is sometimes confusion as the imperial gallon is 20% larger than the US gallon so that mpg values are not directly comparable. Traditionally, litres per mil were used in Norway and Sweden, but both have aligned to the EU standard of L/100 km. [1]
Fuel consumption is a more accurate measure of a vehicle's performance because it is a linear relationship while fuel economy leads to distortions in efficiency improvements.[2] Weight-specific efficiency (efficiency per unit weight) may be stated for freight, and passenger-specific efficiency (vehicle efficiency per passenger) for passenger vehicles.
^"Information on the fuel consumption of new cars". Archived from the original on 8 September 2019. Retrieved 7 November 2019.
^"Learn More About the Fuel Economy Label for Gasoline Vehicles". Archived from the original on 2013-07-05.
Fuelefficiency (or fuel economy) is a form of thermal efficiency, meaning the ratio of effort to result of a process that converts chemical potential...
to compare them. The fuelefficiency of motor vehicles can be expressed in multiple ways: Fuel consumption is the amount of fuel used per unit distance;...
Energy efficiency in transport is often described in terms of fuel consumption, fuel consumption being the reciprocal of fuel economy. Nonetheless, fuel consumption...
The fuel economy in aircraft is the measure of the transport energy efficiency of aircraft. Fuelefficiency is increased with better aerodynamics and...
Engine efficiency of thermal engines is the relationship between the total energy contained in the fuel, and the amount of energy used to perform useful...
average fuel economy of cars and light trucks (trucks, vans and sport utility vehicles) produced for sale in the United States. More recently, efficiency standards...
reduce fuel consumption. The issue has been re-examined by modern economists studying consumption rebound effects from improved energy efficiency. In addition...
different ways: energy efficiencyfuel/propellant consumption (brake specific fuel consumption for shaft engines, thrust specific fuel consumption for jet...
hydrogen as fuel, and limit the diffusion of nitrogen into the anode via the proton exchange membrane, which forms NOx. The energy efficiency of a fuel cell...
light Fuelefficiency, the efficiency of converting potential energy in a fuel into kinetic energy Energy efficiency in transportation, the fuel economy...
structure to maximize fuelefficiency and minimize emissions. Until 2015, the first generation Insight ranks as the most fuel-efficient United States...
Table chart for Gasoline-fueled or LPG- fueled Motor Vehicles, Diesel-Powered Motor Vehicles, and Vehicle FuelEfficiency Standards. From 1 January 2024...
complex high-bypass turbofan engines. They give higher speed and greater fuelefficiency than piston and propeller aeroengines over long distances. A few air-breathing...
and 1. Energy conversion efficiency depends on the usefulness of the output. All or part of the heat produced from burning a fuel may become rejected waste...
by wingtip vortices and improve lift-to-drag ratio. This increases fuelefficiency in powered aircraft and increases cross-country speed in gliders, in...
electrolyte. Advantages of this class of fuel cells include high combined heat and power efficiency, long-term stability, fuel flexibility, low emissions, and...
amount of fuel that is injected, and the air-fuel ratio is usually high. The diesel engine has the highest thermal efficiency (engine efficiency) of any...
attendant weight penalty, but at the cost of increased fuel consumption (decreased fuelefficiency) which limits its use to short periods. This aircraft...
where a fuel is burned, there are two types of thermal efficiency: indicated thermal efficiency and brake thermal efficiency. This form of efficiency is only...
specific fuel consumption in Wiktionary, the free dictionary. Specific fuel consumption may refer to: Brake-specific fuel consumption, fuelefficiency within...
Combining two or more thermodynamic cycles improves overall efficiency, which reduces fuel costs. The principle is that after completing its cycle in the...
uses light truck as a vehicle class in regulating fuel economy through the Corporate Average Fuel Economy (CAFE) standard. The class includes vans, minivans...
recognition of energy efficiency as the "first fuel", meaning the ability to replace or avoid the consumption of actual fuels. In fact, International...
percent better fuelefficiency than Mazda's R2 2.2 MZR-CD These engines are subjected to a number of recalls world-wide relating to leaking fuel injectors...
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