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  2. Engine efficiency - Wikipedia

    en.wikipedia.org/wiki/Engine_efficiency

    They determined that the cost of a ton of oil fuel used in steam engines was $5.04 and yielded 20.37 train miles system wide on average. Diesel fuel cost $11.61 but produced 133.13 train miles per ton. In effect, diesels ran six times as far as steamers utilizing fuel that cost only twice as much.

  3. Volumetric efficiency - Wikipedia

    en.wikipedia.org/wiki/Volumetric_efficiency

    Many high performance cars use carefully arranged air intakes and tuned exhaust systems that use pressure waves to push air into and out of the cylinders, making use of the resonance of the system. Two-stroke engines are very sensitive to this concept and can use expansion chambers that return the escaping air-fuel mixture back to the

  4. Otto cycle - Wikipedia

    en.wikipedia.org/wiki/Otto_cycle

    Expansion of working fluid takes place isentropically and work is done by the system on the piston. The volume ratio / is called the "isentropic expansion ratio". (For the Otto cycle is the same as the compression ratio /). Mechanically this is the expansion of the hot gaseous mixture in the cylinder known as expansion (power) stroke.

  5. The Most Fuel-Efficient Cars (That Aren't Hybrids) - AOL

    www.aol.com/most-fuel-efficient-cars-arent...

    When gas prices soar, the Sentra's small fuel tank can make filling up less heartbreaking than larger cars with even bigger ones. Base price: $21,745 EPA combined/city/highway: 34/30/40 mpg

  6. Fuel efficiency - Wikipedia

    en.wikipedia.org/wiki/Fuel_efficiency

    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. [12] The fuel economy of an automobile relates to the distance traveled by a vehicle and the amount of fuel consumed. Consumption ...

  7. Flame speed - Wikipedia

    en.wikipedia.org/wiki/Flame_speed

    The flame speed is the measured rate of expansion of the flame front in a combustion reaction. Whereas flame velocity is generally used for a fuel, a related term is explosive velocity, which is the same relationship measured for an explosive. Combustion engineers differentiate between the laminar flame speed and turbulent flame speed.

  8. Diesel cycle - Wikipedia

    en.wikipedia.org/wiki/Diesel_cycle

    The net work produced is also represented by the area enclosed by the cycle on the p–V diagram. The net work is produced per cycle and is also called the useful work, as it can be turned to other useful types of energy and propel a vehicle (kinetic energy) or produce electrical energy. The summation of many such cycles per unit of time is ...

  9. Consumption map - Wikipedia

    en.wikipedia.org/wiki/Consumption_map

    A consumption map or efficiency map [1] is a chart that displays the brake-specific fuel consumption of an internal combustion engine at a given rotational speed and mean effective pressure, in grams per kilowatt-hour (g/kWh). The map contains each possible condition combining rotational speed and mean effective pressure.