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  2. Natural gas vehicle - Wikipedia

    en.wikipedia.org/wiki/Natural_gas_vehicle

    The inherent advantage of autogas over CNG is that it requires far less compression (20% of CNG cost), [21] is denser and easier to store as at this lower pressure it is a liquid at room temperature, and thus requires far cheaper tanks (consumer) and fuel compressors (provider) than CNG.

  3. Hydrogen internal combustion engine vehicle - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_internal...

    Therefore, depending on how the fuel is metered, the maximum output for a hydrogen engine can be either 15% higher or 15% less than that of gasoline if a stoichiometric air/fuel ratio is used. However, at a stoichiometric air/fuel ratio, the combustion temperature is very high and as a result it will form a large amount of nitrogen oxides ( NO ...

  4. Autogas - Wikipedia

    en.wikipedia.org/wiki/Autogas

    Since, 2003, when the subsidies disappeared, the number of cars running on LPG has decreased and the number of cars running on diesel has increased. This was partly due to the tax incentives to purchase diesel cars. In recent years, the use of autogas as a vehicle fuel has accounted for less than 2% of vehicle fuel use in Belgium.

  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. Alternative fuel vehicle - Wikipedia

    en.wikipedia.org/wiki/Alternative_fuel_vehicle

    LPG or liquefied petroleum gas (LPG) is a low pressure liquefied gas mixture composed mainly of propane and butane which burns in conventional gasoline combustion engines with less CO 2 than gasoline. Gasoline cars can be retrofitted to LPG aka Autogas and become bifuel vehicles as the gasoline tank is not removed, allowing drivers to switch ...

  7. Hydrogen vehicle - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_vehicle

    Many large rockets use liquid hydrogen as fuel, with liquid oxygen as an oxidizer (LH2/LOX). An advantage of hydrogen rocket fuel is the high effective exhaust velocity compared to kerosene/LOX or UDMH/NTO engines. According to the Tsiolkovsky rocket equation, a rocket with higher exhaust velocity uses less propellant to accelerate. Also the ...

  8. Hybrid vehicle - Wikipedia

    en.wikipedia.org/wiki/Hybrid_vehicle

    Though hybrid cars consume less fuel than conventional cars, there is still an issue regarding the environmental damage of the hybrid car battery. [ 75 ] [ 76 ] Today, most hybrid car batteries are Lithium-ion , which has higher energy density than nickel–metal hydride batteries and is more environmentally friendly than lead-based batteries ...

  9. Nitrous oxide engine - Wikipedia

    en.wikipedia.org/wiki/Nitrous_oxide_engine

    The system increases the engine's power output by allowing fuel to be burned at a higher-than-normal rate, because of the higher partial pressure of oxygen injected with the fuel mixture. [1] Nitrous injection systems may be "dry", where the nitrous oxide is injected separately from fuel, or "wet" in which additional fuel is carried into the ...

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