A simulative investigation for transient engine development involving methanol and ammonia fuel blends

Bhawandeep Sharma･Madan Kumar (Guangdong Technion Israel Institute of Technology)

Transient operated vehicles have significantly contributed to higher GHG emissions due to combustion complexity. Considering this challenge, renewable fuels such as methanol and ammonia are studied in transient conditions. The work includes comprehensive experimental and numerical analysis of methanol-ammonia blends for genset engine. The analysis focuses on the performance, combustion and emissions by tuning load, injection timing, spark timing, and blend ratio. Results indicate that increasing ammonia in the fuels increases indicated efficiency. Moreover, more ammonia percentage in the fuels leads to decrement in NOx and CO2. However, BSFC and combustion duration increased due to slow combustion properties of ammonia.

Development of elemental technologies using ethanol-containing fuel

Tomohiro Nakayama･Kenu Takahashi･Takahiro Seino･Yuuki Itou･Masami Shiki･Ryo Iwashita･Shohei Matsuoka (SUBARU)

This paper describes the results of actual verification of fuel characteristics such as power output and exhaust gas emissions, as well as reliability using ethanol-containing fuel (E30 or higher), as well as issues and countermeasures.

Multi-Cylinder Demonstration of a Pre-Chamber Lean-Burn Gasoline Combustion System Using Real-Time Fuel Reforming

MAKOTO KANEKO (Chiba University)･TOSHIO YAMADA (Sustainable Engine Research Center Co., Ltd.)･TATSUYA KUBOYAMA･YASUO MORIYOSHI (Chiba University)

In the two preceding reports, we demonstrated low NOx emissions and highly efficient combustion in a single-cylinder engine using a high-pressure storage tank containing the same composition as the experimentally verified reformed gas and mechanical supercharging.
In this study, we conducted a feasibility study on a four-cylinder system using real-time fuel reforming with high controllability achieved through improved warm-up heating using halogen lamps. Through a 1D simulation study, we confirmed that this can be achieved even with a small single-stage turbocharger.

Research on Small Two-stroke Opposed Piston Power Unit

Akira Iijima･Yoshiaki Yamazaki･Jinru Liu･Shumpei Fukushima･Yusuke Otaki･Ikumi Okawara･Sou Watanabe (Nihon University)

Internal combustion engines for electric powertrains are required to have high power density, high thermal efficiency, and low vibration and noise characteristics. As an engine that can achieve such characteristics, we focused on the two-stroke opposed piston engine. In this study, a small two-stroke opposed piston engine have prototyped and investigated its basic combustion characteristics.