Physical Theory of the Single-Point Auto-Ignition Engine Based on Supermulti-Jets Colliding with Pulse: Leading to Thermal Efficiency over 60% at Various Engine Speeds and Loads of Automobiles

Ken Naitoh, Kentaro Kojima, Takuma Okamoto, Kan Yamagishi, Taro Tamura, Kouichi Ishida, Shouhei Nonaka

    研究成果: Conference contribution

    10 引用 (Scopus)

    抄録

    This paper proposes 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 engines having strokes shorter than 100mm, whereas eco-friendly gasoline engines for today's automobiles use less than 35% of the supplied energy for work on average. This level of efficiency can be achieved with colliding supermulti-jets that create air insulation to encase burned gas around the chamber center, thereby avoiding contact with the chamber walls, including the piston. Emphasis is also placed on the fact that higher compression results in less combustion noise because of the encasing effect. We will first show that numerical computations done for two jets colliding in line quantitatively agree with shock-tube experiment and theoretical value based on compressible fluid mechanics. Next, computations for colliding of many pulse jets distributed with point-symmetry show a high compression ratio over 30:1, pressure ratio over 100:1, and compression temperature over 1200K. A new P-V diagram extended for this engine concept is also shown, which is between the Otto and Lenoir cycles.

    元の言語English
    ホスト出版物のタイトルSAE Technical Papers
    出版者SAE International
    2014-October
    DOI
    出版物ステータスPublished - 2014 10 13
    イベントSAE 2014 International Powertrains, Fuels and Lubricants Meeting, FFL 2014 - Birmingham, United Kingdom
    継続期間: 2014 10 202014 10 22

    Other

    OtherSAE 2014 International Powertrains, Fuels and Lubricants Meeting, FFL 2014
    United Kingdom
    Birmingham
    期間14/10/2014/10/22

    Fingerprint

    Automobiles
    Ignition
    Engines
    Shock tubes
    Fluid mechanics
    Acoustic noise
    Pistons
    Contacts (fluid mechanics)
    Gasoline
    Insulation
    Hot Temperature
    Air
    Gases
    Experiments
    Temperature

    ASJC Scopus subject areas

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

    これを引用

    Physical Theory of the Single-Point Auto-Ignition Engine Based on Supermulti-Jets Colliding with Pulse : Leading to Thermal Efficiency over 60% at Various Engine Speeds and Loads of Automobiles. / Naitoh, Ken; Kojima, Kentaro; Okamoto, Takuma; Yamagishi, Kan; Tamura, Taro; Ishida, Kouichi; Nonaka, Shouhei.

    SAE Technical Papers. 巻 2014-October SAE International, 2014.

    研究成果: Conference contribution

    Naitoh, K, Kojima, K, Okamoto, T, Yamagishi, K, Tamura, T, Ishida, K & Nonaka, S 2014, Physical Theory of the Single-Point Auto-Ignition Engine Based on Supermulti-Jets Colliding with Pulse: Leading to Thermal Efficiency over 60% at Various Engine Speeds and Loads of Automobiles. : SAE Technical Papers. 巻. 2014-October, SAE International, SAE 2014 International Powertrains, Fuels and Lubricants Meeting, FFL 2014, Birmingham, United Kingdom, 14/10/20. https://doi.org/10.4271/2014-01-2640
    Naitoh, Ken ; Kojima, Kentaro ; Okamoto, Takuma ; Yamagishi, Kan ; Tamura, Taro ; Ishida, Kouichi ; Nonaka, Shouhei. / Physical Theory of the Single-Point Auto-Ignition Engine Based on Supermulti-Jets Colliding with Pulse : Leading to Thermal Efficiency over 60% at Various Engine Speeds and Loads of Automobiles. SAE Technical Papers. 巻 2014-October SAE International, 2014.
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