This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Methanol Lean Burn in an Auto-Ignition DI Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 23, 1998 by SAE International in United States
Annotation ability available
A new combustion system targeting a drastic decrease in NOx emission and a brake specific energy consumption equivalent to that of a DI diesel engine has been developed. In this new combustion system, a lean burn system using early injection was employed to reduce NOx emission and an auto-ignition DI engine system was employed to achieve the low energy consumption. Methanol was used as the fuel for reducing NOx emission. The objective of this study is to clarify the possibility of the system for the auto-ignition of a premixed lean mixture of methanol fuel.
This study shows that the gas temperature at ignition, Tig, is the predominant factor affecting auto-ignition. Auto-ignition occurs when Tig exceeds approximately 1000K. The methanol lean burn system in an auto-ignition DI engine drastically decreased NOx emission with almost the same brake specific energy consumption as a diesel engine in the middle load region. In particular, a NOx emission of 2 g/kWh or less was achieved at the brake specific energy consumption in the range from 10.5 MJ/kWh to 11MJ/kWh in the middle load region.
CitationSeko, T., Kuroda, E., and Hamano, Y., "Methanol Lean Burn in an Auto-Ignition DI Engine," SAE Technical Paper 980531, 1998, https://doi.org/10.4271/980531.
- Takeda, Y., Nakagome, K. a n d Niimura, K. “Emission Characteristics of Premixed Lean Diesel Combustion with Extremely Early Staged Fuel Injection”, SAE paper 961163
- Yanagihara, H., Satou, Y. and Mizutani, J. “A Simultaneous Reduction of NOx and Soot in Diesel Engines under a New Combustion System (Uniform Bulky Combustion System-UNIBUS)”, 17th Int. Viena Motor Symposium, 1996.
- Tsuchiya, K. and Seko, T. “Combustion Improvement of Heavy-Duty Methanol Engine by Using Auto-ignition System”, SAE paper 950060, Transactions.
- Onishi, S., et al., “Active Thermo-Atmosphere Combustion (ATAC) - A New Combustion Process for Internal Combustion Engines”, SAE paper 790501
- Ishibashi, Y., et al., “Improving the Exhaust Emissions of Two-Stroke Engine by Applying the Activated Radical Combustion”, SAE paper 960742
- Najt, P.M., and Foster, D.E., “Compression-Ignited Homogeneous Charge Combustion”, SAE paper 830264
- Thring, R.H., “Homogeneous Charge Compression Ignition (HCCI) Engines”, SAE paper 892068
- lida, N., “Combustion Analysis of Methanol-Fueled Active Thermo-Atmosphere Combustion (ATAC) Engine Using a Spectroscopic Observation”, SAE paper 94068