Development of Fugine Based on Supermulti-Jets Colliding with Pulse: Leading to Stable Plug-Less Start and Improvement of HCCI with Satisfactory Strength of Structure

Ken Naitoh, Kenya Hasegawa, Tomoaki Kubota, Taiki Hashimoto, Yoshiyuki Nojima, Masato Tanaka, Kentaro Kojima

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    9 Citations (Scopus)

    Abstract

    In our previous reports based on computational experiments and fluid dynamic theory, we proposed a new compressive combustion principle for an inexpensive, lightweight, and relatively quiet engine reactor that has the potential to achieve incredible thermal efficiency over 60% even for small combustion chambers having less than 100 cc. This level of efficiency can be achieved with colliding supermulti-jets that create complete air insulation to encase burned gas around the chamber center, thereby avoiding contact with the chamber walls, including the piston. We originally developed an actual prototype engine system for gasoline. The engine has a strongly-asymmetric double piston and the supermulti-jets colliding with pulse, although there are no poppet valves. The number of jets pulsed for intake and exhaust is eight, while both of bore and stroke are about 40mm. The present prototype engine can widely vary point-compression strength due to the supermulti-jets and mechanical homogeneous compression level, by changing the phase of two gears and size ratio of two gears between the double piston. Experimental data obtained by combustion tests with a traditional starter motor indicates a possibility of stable engine start for gasoline without any plugs in case of mechanical compression ratio less than 10:1.

    Original languageEnglish
    Title of host publicationSAE Technical Papers
    PublisherSAE International
    Volume2014-October
    DOIs
    Publication statusPublished - 2014 Oct 13
    EventSAE 2014 International Powertrains, Fuels and Lubricants Meeting, FFL 2014 - Birmingham, United Kingdom
    Duration: 2014 Oct 202014 Oct 22

    Other

    OtherSAE 2014 International Powertrains, Fuels and Lubricants Meeting, FFL 2014
    CountryUnited Kingdom
    CityBirmingham
    Period14/10/2014/10/22

    ASJC Scopus subject areas

    • Automotive Engineering
    • Safety, Risk, Reliability and Quality
    • Pollution
    • Industrial and Manufacturing Engineering

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  • Cite this

    Naitoh, K., Hasegawa, K., Kubota, T., Hashimoto, T., Nojima, Y., Tanaka, M., & Kojima, K. (2014). Development of Fugine Based on Supermulti-Jets Colliding with Pulse: Leading to Stable Plug-Less Start and Improvement of HCCI with Satisfactory Strength of Structure. In SAE Technical Papers (Vol. 2014-October). SAE International. https://doi.org/10.4271/2014-01-2639