Privious Issue

Volume 48 Number 4 (2017.12)

Special Feature

Challenges of Internal Combustion Engines for Achieving Low-carbon Society

Part I. Special Feature


Research Reports

  • 2. Concept of Thermo-swing Heat Insulation on Combustion Chamber Walls and Required Thermo-physical Properties for Heat Insulation CoatingPDF(1013kB)

    pages 1-10
    Hidemasa Kosaka, Yoshifumi Wakisaka, Yoshihiro Nomura, Yoshihiro Hotta, Makoto Koike, Kiyomi Nakakita and Akio Kawaguchi

    This study focuses on the investigation of heat insulation by thermo-swing coating with large fluctuations of the surface temperature, following the gas phase temperature. The dependence of surface temperature fluctuations on the thermophysical properties are analytically characterized. In addition, the proposed structure of the thermo-swing coating is experimentally demonstrated.

  • 3. Development of Thermo-swing Insulation Coat "SiRPA" (Sirica Reinforced Porous Anodized Aluminum)PDF(1038kB)

    pages 11-17
    Toshio Horie, Fumio Shimizu and Naoki Nishikawa

    The application of porous anodized aluminum films to thermo swing wall insulation technology was examined. Such films require high porosity and sufficient strength to withstand conditions in a combustion chamber. Increasing porosity typically results in embrittlement, but the present study overcame this trade-off by reinforcing the anodized film with silica.

  • 4. Reduction of Cooling Heat Loss and Improvement of Thermal Efficiency by Application of “TSWIN” to Direct-injection Diesel EnginesPDF(2038kB)

    pages 19-30
    Yoshifumi Wakisaka, Minaji Inayoshi, Kenji Fukui, Hidemasa Kosaka, Yoshihiro Hotta, Akio Kawaguchi, Hiroki Iguma, Hideo Yamashita, Noriyuki Takada and Chikanori Yamashita

    This paper focuses on the experimental verification of “Thermo-swing Wall Insulation Technology (TSWIN)”. A four-cylinder turbocharged diesel engine with insulation coating shows the reduction of cooling loss and the increases of not only exhaust energy but also piston work without any deteriorations of engine performances.

  • 5. Verification of Thermo-swing Temperature Cyclic Fluctuation by Laser-induced Phosphorescence ThermometryPDF(3186kB)

    pages 31-41
    Kenji Fukui, Yoshifumi Wakisaka, Kazuaki Nishikawa, Yoshiaki Hattori, Hidemasa Kosaka and Akio Kawaguchi

    To verify thermo-swing temperature fluctuations on a combustion chamber wall, we developed a technique to measure the temperature using laser-induced phosphorescence. This technique was applied to an optically accessible engine. Temperature measurements of the thermo-swing coating revealed a steep temperature rise during the combustion period and a temperature drop during the intake stroke.

  • 6. Catalytic Conversion of Botryococcus Braunii Oil to Drop-in Fuel under Mild Reaction ConditionsPDF(816kB)

    pages 43-53
    Seiji Yamamoto, Yoshiyuki Mandokoro, Susumu Nagano, Kinya Atsumi and Makoto M. Watanabe

    The aim of this research was to develop an on-site process to convert the oil extracted from the Bot-22 strain of Botryococcus braunii to a diesel fuel, a so-called “drop-in” fuel. The results of experimental analysis for catalytic conversion under mild conditions indicate that further development of the conversion technology is required to produce a drop-in fuel, although the physical properties of the converted oil did satisfy the grade No. 2, specified by the Japan Industrial Standards diesel fuel specification (JIS K 2204) with a high yield.

  • 7. Ionic Liquid-based Consolidated Bioprocessing (i-CBP) for Cellulosic Ethanol ProductionPDF(1301kB)

    pages 55-64
    Nobuhiro Ishida, Noriho Kamiya, Chiaki Ogino and Toru Onishi

    A novel concept of ionic liquid-based consolidated bioprocessing (i-CBP) was established for the efficient production of ethanol from biomass. We have demonstrated that biomass pretreated with ionic liquids can be easily hydrolyzed to glucose and directly converted to ethanol using functional transgenic yeasts.

Part II.

Special Review

  • 8. Human Characteristics Models for Automobile Design PDF(2288kB)

    pages 65-85
    Toshihiro Wakita

    Human characteristics models are important for development of high-quality vehicles reflecting human characteristics effectively and efficiently. There are two basic approaches to developing these models: physical and statistical. Each approach has advantages and disadvantages. In this paper, four previous studies of automobile human characteristics models are reviewed and discussed.