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Fuel economy improvement by on board electrolytic hydrogen production

 Fuel economy is a major area of interest for the public and policy makers. There are several reasons for this interest [1]:

    •  fuel economy is directly related to CO2 emissions which constitute a greenhouse gas that traps the Earth's heat and contributes to the potential for global warming;
    •  most of the fuel consumed is derived from crude oil and world crude oil reserves are depleting fast;
    •  fuel economy is related to vehicle travel cost and world vehicle travel has doubled since 1970.

Therefore, it is of great importance to increase the fuel economy to the extent of the current level of technology limits. Many scientists and researchers tried to develop new technologies to achieve low fuel consuming cars and vehicles. Some came up with the utilisation of alternative fuels, some improved the engine designs and some invented new ways to power the vehicles. This study presents a hydrogas system, basically a hydrogen generator by the electrolysis of water. The system can be used for both spark ignited and compression ignition internal combustion engines. Within the compact structure of the system, tap water is electrolysed by so called ``closed cell electrode technology''. Coal particles bonded together by a novel material constitute one pole of the electrolyser circuitry making non-corrosive and wear free operation possible for years, without using any catalysers like caustics and acids. Thus, produced hydrogen gas along with oxygen are fed to the intake manifold. Due to the simultaneous production and consumption of hydrogen, no storage is necessary, which results in safe operation.

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Ecosceptor - Fuel Economy Technical Report

The attached document covers a variety of different technologies and techniques used in order to obtain gains in fuel economy.  It helps to give a general overview of how these techniques work and the practicality of implimenting them into modern day vehicles.

Listed below is a brief summary of the topics discussed.

    1. Is improved fuel economy possible?
      1. How efficient are today's vehicles?
      2. Has anybody ever done it before?
        1. Pogue
        2. Ogle
        3. Others
    2. How did they do it?
      1. Vaporizing the fuel
      2. Merely heating 
      3. Chemical additives
      4. Tuning
      5. Engine Modifications
      6. Hydrogen (and variations thereof)
      7. Thermal Catalytic Cracking (TCC)
      8. Plasma
      9. Magnets
      10. Turbocharging
      11. Water injection
    3. How combustion works
    4. Can it be improved?
      1. Improve flame propagation speed
        1. Better vaporize the fuel
        2. Better homogenize the fuel with the air
        3. Add a combustion accelerant
        4. Increase combustibles turbulence velocity
      2. Improve combustion rate
        1. Better vaporize the fuel
        2. Better homogenize the fuel with the air
        3. Add a combustion accelerant
        4. Increase combustibles turbulence velocity
      3. Improve themal-to-pressure / kinetic conversion efficiency
        1. Engine design parameters
        2. Expansion medium
        3. Controlling moment of peak cylinder pressure
        4. Increasing peak pressure at CCA while lowering overall temperature
    5. How does the HHO improve efficiency?
      1. Add hydrogen / oxygen blend to the combustion process
      2. Tuning
    6. Conclusion
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