Honda has developed the Compressed Natural Gas (CNG) engine with Variable Valve Timing Electronic Control. This new engine was designed to further enhance power and efficiency: increased engine displacement and the use of a variable-length air intake manifold have achieved a 15% enhancement in power. In addition, engine fuel consumption has been reduced by 5% through a combination of reduced pumping loss due to inlet valve control for delayed closure, and charging stroke injection timing that harnesses the properties of gaseous fuel. As a countermeasure for tail pipe emissions, an exhaust manifold integrated with the cylinder head and a close coupled two bed catalyst have been used. As a result, the use of precious metals has been reduced by approximately 30%, and the vehicle with the new engine complies with CARB's AT-PZEV standard.


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    Title :

    Development of CNG Engine with Variable Valve Timing Electronic Control


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    Asia Pacific Automotive Engineering Conference ; 2007



    Publication date :

    2007-08-05




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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