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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 ...
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 work. There are two classifications of thermal engines-
The energy efficiency of a fuel cell is generally between 40 and 60%; however, if waste heat is captured in a cogeneration scheme, efficiencies of up to 85% can be obtained. [24] World average fossil fuel electricity generation power plant as of 2008 [25] Chemical to electrical Gross output 39%, Net output 33% Electricity storage: Lithium-ion ...
For battery electric vehicles, the U.S. Environmental Protection Agency's formula to calculate the well-to-wheel MPGe is based on energy standards established by the U.S. Department of Energy in 2000: [2] [13] [14] The well-to-wheel conversion is used in calculation of corporate-average fuel economy (CAFE) but not for window sticker (Monroney ...
Thrust-specific fuel consumption (TSFC) is the fuel efficiency of an engine design with respect to thrust output. TSFC may also be thought of as fuel consumption (grams/second) per unit of thrust (newtons, or N), hence thrust-specific .
To calculate the actual efficiency of an engine requires the energy density of the fuel being used. Different fuels have different energy densities defined by the fuel's heating value. The lower heating value (LHV) is used for internal-combustion-engine-efficiency calculations because the heat at temperatures below 150 °C (300 °F) cannot be ...
For example, the fuel economy target for the 2012 Honda Fit with a footprint of 40 sq ft (3.7 m 2) is 36 miles per US gallon (6.5 L/100 km), equivalent to a published fuel economy of 27 miles per US gallon (8.7 L/100 km) (see #Calculations of MPG overestimated for information regarding the difference), and a Ford F-150 with its footprint of 65 ...
Fuel consumption monitor from a 2006 Honda Airwave.The displayed fuel economy is 18.1 km/L (5.5 L/100 km; 43 mpg ‑US). A Briggs and Stratton Flyer from 1916. Originally an experiment in creating a fuel-saving automobile in the United States, the vehicle weighed only 135 lb (61.2 kg) and was an adaptation of a small gasoline engine originally designed to power a bicycle.