Výsledky vyhledávání - "Nobuyuki Kawahara"

Akademický článek

CO2 concentration measurements inside expansion-compression engine under high EGR conditions using an infrared absorption method

Autor: Fatma B.M. Ahmed, Mohamed F.C. Esmail, Nobuyuki Kawahara, Eiji Tomita

Publikováno v: Ain Shams Engineering Journal, Vol 11, Iss 3, Pp 787-793 (2020)

The purpose of this study is to measure the high concentrations of CO2 near a spark plug inside an internal combustion engine, and an infrared absorption method is used for the measurement. The spark plug sensor was adapted to a compression-expansion

Externí odkaz: https://doaj.org/article/59f4b039c52145d2a46f3da947be7220

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Akademický článek

Measurement of Cyclic Variation of the Air-to-Fuel Ratio of Exhaust Gas in an SI Engine by Laser-Induced Breakdown Spectroscopy

Autor: Yuji Ikeda, Nobuyuki Kawahara

Publikováno v: Energies, Vol 15, Iss 9, p 3053 (2022)

Temporally and spatially resolved laser-induced breakdown spectroscopy (LIBS) was applied to a four-stroke, single-cylinder test engine’s cyclic exhaust gas to demonstrate engine performance. The LIBS technique provided quantitative air-to-fuel rat

Externí odkaz: https://doaj.org/article/ae6a660f908a432ab4a7e28564a005ad

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Akademický článek

Effects of Compression Ratio and Simulated EGR on Combustion Characteristics and Exhaust Emissions of a Diesel PCCI Engine

Autor: Robert KIPLIMO, Eiji TOMITA, Nobuyuki KAWAHARA, Sumito YOKOBE

Publikováno v: Journal of Thermal Science and Technology, Vol 6, Iss 3, Pp 463-474 (2011)

The effects of compression ratio and simulated exhaust-gas recirculation (EGR) on combustion characteristics and exhaust emissions of a diesel PCCI engine were investigated using a single-cylinder test engine. Tests were carried out under constant sp

Externí odkaz: https://doaj.org/article/0e3f318f09b44f3484e78f1784ec35a0

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Akademický článek

Evaluation of the Flame Lift-off Length in Diesel Spray Combustion Based on Flame Extinction

Autor: Ulugbek AZIMOV, Nobuyuki KAWAHARA, Eiji TOMITA, Kazuya TSUBOI

Publikováno v: Journal of Thermal Science and Technology, Vol 5, Iss 2, Pp 238-251 (2010)

The interaction of spray and combustion processes forms a complex system of physical phenomena undergoing in IC engines. Studying this interaction is important to determine strategies for simultaneously reducing soot and NOx emissions from diesel eng

Externí odkaz: https://doaj.org/article/fe0a44bbcead4615b69388998b34d55d

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Akademický článek

Characterization of the Spray of the DISI Multi-hole Injector by Means of Phase Doppler Anemometer

Autor: Fatma AHMED, Nobuyuki KAWAHARA, Eiji TOMITA, Mamoru SUMIDA

Publikováno v: Journal of Thermal Science and Technology, Vol 5, Iss 1, Pp 36-50 (2010)

The spray from a multi-hole injector applied to direct injection spark ignition (DISI) engine was investigated. In order to understand the detailed structure of the transient spray near the nozzle a combined LDA/PDA system was used. PDA system was op

Externí odkaz: https://doaj.org/article/e6368fdcf82b4ab1b09bc76fc88372e2

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