Search Results - "Tomita, Eiji"

Improvement of thermal efficiency and reduction of NOx emissions by burning a controlled jet plume in high-pressure direct-injection hydrogen engines by Takagi, Yasuo, Mori, Hiroki, Mihara, Yuji, Kawahara, Nobuyuki, Tomita, Eiji

“…A new combustion process called the Plume Ignition Combustion Concept (PCC), in which the plume tail of the hydrogen jet is spark-ignited immediately after the…”
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Visualization of auto-ignition and pressure wave during knocking in a hydrogen spark-ignition engine by Kawahara, Nobuyuki, Tomita, Eiji

“…Visualizations of auto-ignition inside the end-gas region due to flame propagation and pressure waves that occur during knocking were carried out in a hydrogen…”
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Extension of PREMIER combustion operation range using split micro pilot fuel injection in a dual fuel natural gas compression ignition engine: A performance-based and visual investigation by Aksu, Cagdas, Kawahara, Nobuyuki, Tsuboi, Kazuya, Kondo, Morio, Tomita, Eiji

“…•Split injection can suppress knocking to PREMIER combustion.•Split injection can promote normal combustion to PREMIER combustion.•Maximum of usable thermal…”
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Effect of syngas composition on combustion and exhaust emission characteristics in a pilot-ignited dual-fuel engine operated in PREMIER combustion mode by Azimov, Ulugbek, Tomita, Eiji, Kawahara, Nobuyuki, Harada, Yuji

“…The objective of this study was to investigate the performance and emissions of a pilot-ignited, supercharged, dual-fuel engine powered by different types of…”
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End-gas autoignition characteristics of PREMIER combustion in a pilot fuel-ignited dual-fuel biogas engine by Valipour Berenjestanaki, Alireza, Kawahara, Nobuyuki, Tsuboi, Kazuya, Tomita, Eiji

“…•The PI value of PREMIER combustion was proposed to characterize the end-gas autoignition.•End-gas autoignition of a premixed mixture occurred earlier with…”
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Combustion characteristics of wet ethanol ignited using a focused Q-switched Nd:YAG nanosecond laser by Rahman, Kazi Mostafijur, Kawahara, Nobuyuki, Tsuboi, Kazuya, Tomita, Eiji

“…Ethanol is a particularly promising bio-fuel, which is already widely used in the transportation sector. Much research has focused on laser ignition in…”
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Local fuel concentration measurement through spark-induced breakdown spectroscopy in a direct-injection hydrogen spark-ignition engine by Rahman, Kazi Mostafijur, Kawahara, Nobuyuki, Matsunaga, Daichi, Tomita, Eiji, Takagi, Yasuo, Mihara, Yuji

“…Quantitative measurements of local fuel concentrations were conducted in a direct-injection hydrogen spark-ignition research engine using the spark-induced…”
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Comparison of performance and emissions of a supercharged dual-fuel engine fueled by hydrogen and hydrogen-containing gaseous fuels by Roy, Murari Mohon, Tomita, Eiji, Kawahara, Nobuyuki, Harada, Yuji, Sakane, Atsushi

“…This study investigated the engine performance and emissions of a supercharged engine fueled by hydrogen (H 2), and three other hydrogen-containing gaseous…”
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Jet-guided combustion characteristics and local fuel concentration measurements in a hydrogen direct-injection spark-ignition engine by Roy, Mithun Kanti, Kawahara, Nobuyuki, Tomita, Eiji, Fujitani, Takashi

“…Spark-ignition (SI) hydrogen engines based on direct injection (DI) promise significant advantages in terms of thermal efficiency and power output, and present…”
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Effect of ambient pressure on local concentration measurement of transient hydrogen jet in a constant-volume vessel using spark-induced breakdown spectroscopy by Abdul Rahman, Md Tasyrif, Kawahara, Nobuyuki, Tsuboi, Kazuya, Tomita, Eiji

“…We report an investigation of the effects of the ambient pressure on fuel concentration measurements of an injected jet of hydrogen using spark-induced…”
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CO2 concentration measurements inside expansion-compression engine under high EGR conditions using an infrared absorption method by Fatma B.M. Ahmed, Mohamed F.C. Esmail, Nobuyuki Kawahara, Eiji Tomita

“…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…”
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Visualization and concentration measurement of a direct-injection hydrogen jet in a constant-volume vessel using spark-induced breakdown spectroscopy by Abdul Rahman, Md Tasyrif, Kawahara, Nobuyuki, Tsuboi, Kazuya, Tomita, Eiji

“…In this work, spark-induced breakdown spectroscopy (SIBS) was employed to investigate the mixing process of a hydrogen jet in a constant-volume vessel. The…”
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Densitometry and temperature measurement of combustion gas by X-ray Compton scattering by Sakurai, Hiroshi, Kawahara, Nobuyuki, Itou, Masayoshi, Tomita, Eiji, Suzuki, Kosuke, Sakurai, Yoshiharu

“…Measurement of combustion gas by high‐energy X‐ray Compton scattering is reported. The intensity of Compton‐scattered X‐rays has shown a position dependence…”
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Laser-induced plasma generation and evolution in a transient spray by Kawahara, Nobuyuki, Tsuboi, Kazuya, Tomita, Eiji

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Effects of Compression Ratio and Simulated EGR on Combustion Characteristics and Exhaust Emissions of a Diesel PCCI Engine by Robert KIPLIMO, Eiji TOMITA, Nobuyuki KAWAHARA, Sumito YOKOBE

“…The effects of compression ratio and simulated exhaust-gas recirculation (EGR) on combustion characteristics and exhaust emissions of a diesel PCCI engine were…”
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Evaluation of the Flame Lift-off Length in Diesel Spray Combustion Based on Flame Extinction by Ulugbek AZIMOV, Nobuyuki KAWAHARA, Eiji TOMITA, Kazuya TSUBOI

“…The interaction of spray and combustion processes forms a complex system of physical phenomena undergoing in IC engines. Studying this interaction is important…”
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High-Pressure Hydrogen Jet and Combustion Characteristics in a Direct-Injection Hydrogen Engine by Roy, Mithun Kanti, Kawahara, Nobuyuki, Tomita, Eiji, Fujitani, Takashi

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PREMIER combustion characteristics of a pilot fuel-ignited dual-fuel biogas engine with consideration of cycle-to-cycle variations by Imamoto, Taku, Kawahara, Nobuyuki, Tomita, Eiji

“…[Display omitted] •The unburned gas temperature was re-estimated by considering the effect of the cycle-to-cycle variations.•The decreased fuel mass at end-gas…”
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Characterization of the Spray of the DISI Multi-hole Injector by Means of Phase Doppler Anemometer by Fatma AHMED, Nobuyuki KAWAHARA, Eiji TOMITA, Mamoru SUMIDA

“…The spray from a multi-hole injector applied to direct injection spark ignition (DISI) engine was investigated. In order to understand the detailed structure…”
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Effects of spray impingement, injection parameters, and EGR on the combustion and emission characteristics of a PCCI diesel engine by Kiplimo, Robert, Tomita, Eiji, Kawahara, Nobuyuki, Yokobe, Sumito

“…The effects of spray impingement, injection parameters, and exhaust gas recirculation (EGR) on the combustion characteristics and exhaust emissions of a…”
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