Effect of PM Reduction due to Hydrogen Oxygen Gas addition to intake air in Diesel Engines

Kanta Kasugai･Takafumi Kato･Ryosei Takeda･Ryoma Ohnishi･Kensei Kurita･Yoshiaki Nishijima (Aichi Institute of Technology)

It is expected to improve fuel efficiency by using of addition of the generated Hydrogen Oxygen GAS in the intake air of an engine. We use the hydrogen oxygen gas produced by electrolysis of water. As a result, we measure a reduction in the mass of particulate matter ad PM in the exhaust gas.

Visualization and Analysis of Formaldehyde Formation and Consumption in Diesel Spray Combustion

Toshiaki Hijima･Tomohiro Hayashi (SOKEN)･Sho Fukuda･Takashi Kawachi･Yuto Tsutsui (Toyota Industries)

With the advancement of fuel diversification driven by carbon neutrality, variations in fuel properties significantly affect combustion and emission characteristics in diesel auto-ignition combustion. In this study, focusing on in-cylinder formaldehyde distribution as an effective indicator of combustion state, a visualization and analysis technique based on chemiluminescence and laser-induced fluorescence (LIF) using a rapid compression expansion machine (RCEM) was developed.

Effects of Intake Gas Conditions on the Carbon Crystallite Size of Soot Particles from a Diesel Engine

Mao Takeuchi･Miyu Yamamoto･Yu Kuroshima･Kazuki Inaba･Kazuhiro Hayashida (Kitami Institute of Technology)

In this study, the effects of intake gas conditions (pressure, temperature, and oxygen concentration) on the carbon crystallite size (La) of soot particles emitted from a diesel engine were investigated. Diesel fuel and hydrotreated vegetable oil (HVO) were used. Regardless of fuel type, La varied with intake gas conditions, and the qualitative trends in its variation were consistent across both fuels.