Cold Fusion
    Fuel Cell hydrogen powered class 8 truck from Nikola Motor Company

    A Homogeneous Charge Compression Ignition runs on gasoline but ignites its fuel using compression like a diesel. The result is an engine that gives you the best of both worlds.The biggest challenge with an HCCI engine is that it can only control that combustion when its internal temperature is kept within a small window. Otherwise, you have knock problems and fuel detonation issues.

    This technology has been underdevelopment for many years, hopefully they will eventually solve the management problems.

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    The following video does a great job of explaining it.

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    NISSAN

    Steps Toward Practical Application of HCCI

    Control of the gas temperature inside the combustion chamber is vital to HCCI combustion range expansion. Nissan has developed the following technologies to deliver this:
    1. Technology for Measuring Gas Temperature inside Combustion Chamber
    2. To accurately measure the gas temperature inside the combustion chamber, which is key to HCCI combustion, Nissan and Stanford University jointly developed technology to measure the real-time gas temperature inside the engine. T
    3. This technology is being utilized for the development of HCCI.
    • 3D HCCI Simulation Technology
      As the ignition mechanism for HCCI combustion does not depend on spark plugs, it is necessary to control the auto-ignition timing and combustion duration. Nissan has newly developed technology to accurately simulate HCCI three-dimensionally.
    • Utilization of VVEL
      To control the gas temperature inside the combustion chamber, it is necessary to change the amount of residual exhaust gas accordingly to driving conditions. Nissan uses VVEL, which allows free-control of the valve timing and lift, for both intake and exhaust valves, to control temperature by effectively using internal EGR.

    This is another interesting video talking about the software and management issues

     

     

     

     

     

     

    Cold Fusion
    Fuel Cell hydrogen powered class 8 truck from Nikola Motor Company
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